Connection device, terminal device and backplane connector

Abstract

The embodiment of the application discloses a connecting device, a terminal device and a backboard connector, the connecting device comprises a first spring piece group and a second spring piece group, the first spring piece group comprises two first spring pieces, the width faces of the two first spring pieces are oppositely arranged, the second spring piece group comprises two second spring pieces, the width faces of the two second spring pieces are oppositely arranged, the width face of the first spring piece is oppositely arranged with the width face of the second spring piece, and the free end of the first spring piece is attached to the second spring piece, and the free end of the second spring piece is attached to the first spring piece. The connecting device has the advantages of simple structure, small impedance fluctuation, low processing and manufacturing cost and the like.

Description

Technical Field

[0001] This invention relates to the field of connector technology, specifically to a connection device, a connection device, and a backplane connector. Background Technology

[0002] Backplane connectors are mainly used in communication equipment, servers and other products to realize the electrical connection between the backplane and various plug-in cards or cable modules. They are responsible for high-speed signal and part of the power transmission, and ensure stable and reliable data interaction within the system. They are key components to ensure high-frequency transmission, structural integration and long-term stable operation of the equipment.

[0003] In related technologies, backplane connectors have long stubs, making it difficult to achieve excellent high-frequency transmission characteristics. Furthermore, their impedance is highly sensitive to changes in structural dimensions and manufacturing tolerances, resulting in stringent requirements for product processing precision and low production yield. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a connection device that can reduce the length of the shrapnel residue and has low impedance sensitivity.

[0006] This invention provides a terminal device with low manufacturing cost and high frequency.

[0007] This invention provides a backplane connector with low production cost and simple structure.

[0008] According to an embodiment of the present invention, a connecting device includes: a first, a connecting device, characterized in that it includes: a first spring sheet group and a second spring sheet group, the first spring sheet group includes two first spring sheets, the width surfaces of the two first spring sheets are spaced apart and arranged opposite to each other, the second spring sheet group includes two second spring sheets, the width surfaces of the two second spring sheets are spaced apart and arranged opposite to each other, the width surfaces of the first spring sheets and the width surfaces of the second spring sheets are arranged opposite to each other, and the free ends of the first spring sheets are attached to the second spring sheets, and the free ends of the second spring sheets are attached to the first spring sheets.

[0009] The connecting device of this invention has a structure in which the first spring and the second spring are arranged at intervals along the thickness direction and their free ends are attached to each other. This not only makes the electromagnetic field distribution more uniform and reduces impedance fluctuations, but also improves the signal transmission stability and high-frequency bandwidth. It can also reduce signal reflection caused by residual pile effect, reduce the requirements for processing accuracy, improve production yield and save manufacturing costs.

[0010] In some embodiments, the free end of the first spring forms a first bend, the first bend being bent toward a side away from the second spring, and / or, the free end of the second spring forms a second bend, the second bend being bent toward a side away from the first spring.

[0011] In some embodiments, a fitting portion is provided between the first spring and the second spring, the fitting portion being disposed on one of the first spring and the second spring, the fitting portion being fitted to the other of the first spring and the second spring, and the fitting portion being located between the first spring and the second spring in a projection plane orthogonal to the width direction of the first spring.

[0012] In some embodiments, the bonding portion includes: a first bonding portion disposed on the first spring sheet, the first bonding portion being bonded to the second spring sheet, and the first bonding portion being located between the first spring sheet and the second spring sheet in a projection plane orthogonal to the width direction of the first spring sheet; and / or, a second bonding portion disposed on the second spring sheet, the second bonding portion being bonded to the first spring sheet, and the second bonding portion being located between the first spring sheet and the second spring sheet in a projection plane orthogonal to the width direction of the second spring sheet.

[0013] In some embodiments, the first spring includes a first segment, a second segment, and a first bend connected in sequence. The first segment extends in a direction adjacent to the second segment and is inclined in a direction away from the second spring. The two ends of the second segment are respectively connected to the first segment and the first bend. The second segment extends in a direction away from the first segment and is inclined in a direction adjacent to the second spring.

[0014] In some embodiments, the second spring sheet includes a third segment, a fourth segment, and a second bent portion connected in sequence. The third segment extends in a direction adjacent to the fourth segment and is inclined in a direction away from the second spring sheet. The two ends of the fourth segment are respectively connected to the third segment and the second bent portion. The fourth segment extends in a direction away from the third segment and is inclined in a direction adjacent to the second spring sheet. The first bent portion is in contact with the third segment, and the second bent portion is in contact with the first segment.

[0015] In some embodiments, the width of the first segment is greater than the width of the second segment and the width of the first bend, and / or the width of the third segment is greater than the width of the fourth segment and the width of the second bend.

[0016] In some embodiments, the connecting device further includes a first shell and a second shell, two first spring pieces are disposed in the first shell, two second spring pieces are disposed in the second shell, the first shell has a mounting cavity on the side facing the second shell, the two first spring pieces are disposed inside the first shell, the second shell has a protrusion, the protrusion passes through the mounting groove, the two second spring pieces are disposed on both sides of the protrusion and both second spring pieces abut against the sides of the protrusion.

[0017] The terminal device of this invention includes the connection device described in any of the above embodiments.

[0018] The backplane connector of this invention includes the connection device described in any one of the above embodiments, or includes the terminals described in the above embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection device according to an embodiment of the present invention.

[0020] Figure 2 This is a front view of the connection device according to an embodiment of the present invention.

[0021] Figure 3 This is an assembly diagram of the first and second springs of the connecting device according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the energy distribution of the first and second springs of the connecting device according to an embodiment of the present invention.

[0023] 100. Connecting device;

[0024] 1. First shrapnel; 11. First bend; 12. First segment; 13. Second segment; 2. Second shrapnel; 21. Second bend; 22. Third section; 23. Fourth section; 3. First shell; 31. Mounting cavity; 4. Second shell; 41. Protrusion. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The connecting device 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0027] like Figures 1-3 As shown, the connecting device 100 according to an embodiment of the present invention includes a first spring group and a second spring group.

[0028] The first spring group includes two first springs 1, with their width surfaces spaced apart and arranged opposite each other. The second spring group includes two second springs 2, with their width surfaces spaced apart and arranged opposite each other. The width surfaces of the first springs 1 and the second springs 2 are attached to each other, and the free ends of the first springs 1 and the second springs 2 are attached to each other.

[0029] Specifically, such as Figure 1 As shown, one of the first and second spring groups can be connected to a server, and the other can be set on another server, so that the two servers can transmit data through the first and second spring groups.

[0030] The first spring group includes two vertical metal first springs 1 arranged at intervals in the left-right direction, and the second spring group includes two vertical metal second springs 2 arranged at intervals in the left-right direction. The two second springs 2 are inserted between the two first springs 1, and together the two first springs 1 and the two second springs 2 form a closed transmission circuit with symmetrical structure and stable electrical performance.

[0031] The width surface of the first spring 1 is positioned opposite to the width surface of the second spring 2. In this arrangement, the electromagnetic field (e.g., electromagnetic field) of the first spring 1 is mainly distributed on its front and rear sides in the width direction (e.g., ...). Figure 4 As shown in the diagram (the electromagnetic field is represented by the red area), similarly, the electromagnetic field of the second spring 2 is also mainly distributed on its front and rear sides along its width. Compared to the structure where the thickness surfaces of the first spring 1 and the second spring 2 are arranged opposite each other, causing their electromagnetic fields to concentrate in the narrow space between them, this embodiment of the invention effectively disperses the electromagnetic fields of the first spring 1 and the second spring 2 by arranging their width surfaces opposite each other. Therefore, through the dispersed arrangement of the electromagnetic field, the impedance fluctuations caused by the concentration effect of the electromagnetic field are reduced, thereby improving the stability of signal transmission.

[0032] Furthermore, the first spring 1 is arranged above the second spring 2, with its lower end in contact with the outer peripheral surface of the second spring 2 and its upper end in contact with the outer peripheral surface of the first spring 1. This effectively reduces the stub effect of the first spring 1 and the second spring 2. The reduction of the stub effect means a reduction in signal reflection and an optimization of the transmission path, which suppresses high-frequency signal reflection and resonance, and improves the upper limit of the operating frequency and bandwidth performance of the connection device 100.

[0033] Finally, because the sensitivity of impedance to process deviations is significantly reduced, the processing tolerance requirements of the first spring 1 and the second spring 2 are reduced, the manufacturability and production yield of the contact are improved, and the processing, assembly and overall manufacturing costs are significantly reduced.

[0034] The connecting device 100 of this embodiment of the invention is provided with a first spring 1 and a second spring 2. The first spring 1 and the second spring 2 are spaced apart along the thickness direction and their free ends are attached to each other. This structural layout effectively disperses the electromagnetic field of the springs, reduces impedance fluctuations, and improves signal transmission stability. At the same time, it weakens the stub effect, reduces signal reflection and resonance, optimizes the transmission path, improves the upper limit of the device's operating frequency and bandwidth performance, and reduces the sensitivity of impedance to process deviations, relaxes processing tolerance requirements, improves product manufacturability and production yield, and significantly reduces processing, assembly and overall manufacturing costs.

[0035] In some embodiments, the free end of the first spring piece 1 forms a first bent portion 11, which bends toward a side away from the second spring piece 2, and / or, the free end of the second spring piece 2 forms a second bent portion 21, which bends toward a side away from the first spring piece 1. Specifically, as Figures 1-3 As shown, the free end of the first spring 1 is a first bent portion 11 facing away from the second spring 2, and the free end of the second spring 2 is a second bent portion 21 facing away from the first spring 1. The first bent portion 11 abuts against the outer peripheral surface of the second spring 2, and the second bent portion 21 abuts against the outer peripheral surface of the first spring 1. Thus, by setting the first bent portion 11 and the second bent portion 21, on the one hand, the first spring 1 and the second spring 2 can form a smooth and stable elastic surface contact through the bent portion, ensuring contact reliability and reducing contact resistance, while avoiding plating scratches, structural interference or insertion / removal jamming caused by direct rigid contact of the free ends; on the other hand, it can effectively reduce the stub effect of the free end, reduce high-frequency signal reflection and impedance change, improve signal transmission quality, and optimize the elastic force distribution of the springs, enhancing structural durability and assembly fault tolerance.

[0036] In some embodiments, a fitting portion (not shown in the figure) is provided between the first spring 1 and the second spring 2. The fitting portion is disposed on one of the first spring 1 and the second spring 2, and the fitting portion is fitted with the other of the first spring 1 and the second spring 2. In a projection plane orthogonal to the width direction of the first spring 1, the fitting portion is located between the first spring 1 and the second spring 2. Specifically, the fitting portion can adopt a bent structure or a protruding structure, and its specific form and arrangement position can be flexibly configured according to actual design requirements: the fitting portion can be disposed on the side of the first spring 1 facing the second spring 2 and form a fitting contact with the second spring 2, or it can be disposed on the side of the second spring 2 facing the first spring 1 and form a fitting contact with the first spring 1, or the fitting portion can be provided on both the first spring 1 and the second spring 2 and achieve mutual fitting. By adding a bonding part, the number of electrical contact points between the first spring 1 and the second spring 2 can be increased, the distance between the first bending part 11 and the second bending part 21 in the vertical direction can be reduced, and the fundamental frequency resonance problem caused by the excessive length of the first bending part 11 and the second bending part 21 in the vertical direction can be suppressed, thereby avoiding the adverse effects of resonance on the working bandwidth and high frequency transmission performance of the connecting device 100.

[0037] In some embodiments, the bonding portion includes a first bonding portion and / or a second bonding portion.

[0038] The first bonding portion is disposed on the first spring piece 1, and the first bonding portion is bonded to the second spring piece 2. In a projection plane orthogonal to the width direction of the first spring piece 1, the first bonding portion is located between the first spring piece 1 and the second spring piece 2. The second bonding portion is disposed on the second spring piece 2, and the second bonding portion is bonded to the first spring piece 1. In a projection plane orthogonal to the width direction of the second spring piece 2, the second bonding portion is located between the first spring piece 1 and the second spring piece 2. Specifically, the arrangement of the first bonding portion and the second bonding portion can be flexibly selected according to actual design requirements: the first bonding portion can be provided only on the side of the first spring piece 1 facing the second spring piece 2 and bonded to the second spring piece 2; the second bonding portion can be provided only on the side of the second spring piece 2 facing the first spring piece 1 and bonded to the first spring piece 1; or the first bonding portion and the second bonding portion can be provided on the first spring piece 1 and the second spring piece 2 respectively, so that the two are bonded to each other to achieve reliable contact.

[0039] By setting the first and second bonding parts, a stable and reliable auxiliary contact structure can be formed between the spring sheets, effectively shortening the effective electrical length of the bending part in the vertical direction, reducing the distance between the first bending part 11 and the second bending part 21, and improving the working bandwidth and high-frequency signal integrity of the connecting device 100. At the same time, the bonding parts can also increase the number of contact points, optimize the contact pressure distribution, improve contact reliability and structural stability, reduce sensitivity to processing and assembly tolerances, and improve product manufacturability.

[0040] In some embodiments, the first spring 1 includes a first segment 12, a second segment 13, and a first bent portion 11 connected in sequence. The first segment 12 extends along a direction adjacent to the second segment 13 and is inclined in a direction away from the second spring 2. The two ends of the second segment 13 are respectively connected to the first segment 12 and the first bent portion 11. The second segment 13 extends along a direction away from the first segment 12 and is inclined in a direction adjacent to the second spring 2. Specifically, as shown... Figure 2 As shown, the first segment 12, the second segment 13 and the first bending part 11 are arranged sequentially in the vertical direction. The upper and lower ends of the second segment 13 are connected to the first segment 12 and the first bending part 11 respectively. The first segment 12 is inclined outward from top to bottom, and the second segment 13 is inclined inward from top to bottom.

[0041] The second spring 2 includes a third segment 22, a fourth segment 23, and a second bent portion 21 connected in sequence. The third segment 22 extends along the direction adjacent to the fourth segment 23 and is inclined in a direction away from the second spring 2. The two ends of the third segment 22 are respectively connected to the fourth segment 23 and the second bent portion 21. The second segment 13 extends along the direction away from the third segment 22 and is inclined in a direction adjacent to the second spring 2. The first bent portion 11 is attached to the third segment 22, and the second bent portion 21 is attached to the first segment 12. Specifically, as shown... Figure 2 As shown, the second bend 21, the fourth segment 23, and the third segment 22 are connected sequentially from top to bottom. The upper and lower ends of the fourth segment 23 are connected to the second bend 21 and the third segment 22, respectively. The third segment 22 slopes inward from bottom to top, and the fourth segment 23 slopes outward from bottom to top. The first bend 11 is in contact with the third segment 22, and the second bend 21 is in contact with the first segment 12. The first segment 12 and the fourth segment 23 are arranged alternately in the inward and outward directions, and the second segment 13 and the third segment 22 are arranged alternately in the inward and outward directions. Thus, the first segment 12, the second segment 13, the third segment 22, and the fourth segment 23 together form a cavity structure, thereby enabling the first spring 1 and the second spring 2 to form a double-contact structure, improving the high-frequency signal transmission performance and operating bandwidth.

[0042] In some embodiments, the width of the first segment 12 is greater than the width of the second segment 13 and the width of the first bend 11, and / or, the width of the third segment 22 is greater than the width of the fourth segment 23 and the width of the second bend 21. Specifically, as Figures 1-3As shown, the dimensions of the first segment 12 in the front-back direction are greater than those of the second segment 13 and the first bend 11 in the front-back direction. The dimensions of the third segment 22 in the front-back direction are greater than those of the fourth segment 23 and the second bend 21 in the front-back direction. This ensures that the first bend 11 can slide up and down on the first segment 12, and the second bend 21 can slide up and down on the third segment 22. This provides a stable displacement space for the insertion and removal process, avoids skewing, jamming, or contact offset during insertion and removal, ensures uniform and stable wiping stroke, and improves the contact reliability and electrical performance consistency of the connector after multiple insertions and removals.

[0043] In some embodiments, the connecting device 100 further includes a first shell 3 and a second shell 4. Two first spring tabs 1 are disposed in the first shell 3, and two second spring tabs 2 are disposed in the second shell 4. The first shell 3 has a mounting cavity 31 on the side facing the second shell 4, and the two first spring tabs 1 are disposed within the first shell 3. The second shell 4 has a protrusion 41 that passes through a mounting groove. Two second spring tabs 2 are disposed on both sides of the protrusion 41, and both second spring tabs 2 abut against the sides of the protrusion 41. Specifically, as shown... Figures 1-3 As shown, the first shell 3 is located above the first spring piece 1 and forms a downward-opening mounting cavity 31. Two first spring pieces 1 are disposed in the mounting cavity 31. The second shell 4 is located below the second spring piece 2, and its upper end face forms a protrusion 41 structure. Two second spring pieces 2 are respectively disposed on both sides of the protrusion 41 in the left-right direction. When the protrusion 41 is inserted into the mounting cavity 31, the two first spring pieces 1, the two second spring pieces 2 and the protrusion 41 are arranged sequentially in the inward and outward directions. The protrusion 41 positions, supports and limits the two second spring pieces 2, ensuring that the spacing of the second spring pieces 2 is uniform and the position is stable, avoiding displacement, shaking or excessive deformation during insertion and removal, ensuring stable contact with the first spring piece 1 and achieving a reliable wiping stroke. In addition, the protrusion 41 and the mounting cavity 31 of the first shell 3 can form a guiding fit during insertion and removal, making insertion and removal smooth and accurate, while enhancing the overall structural rigidity, reducing the risk of spring piece failure under stress, and improving the mechanical stability and service life of the connecting device 100.

[0044] The terminal device of this invention includes the connection device 100 of any of the above embodiments.

[0045] The terminal device of this invention includes a connecting device 100, which enables the terminal to have excellent mechanical connection strength and assembly stability while effectively suppressing impedance changes and high-frequency resonance caused by stubs. This significantly improves the signal transmission performance and operating bandwidth of the terminal, reduces sensitivity to processing and assembly tolerances, and improves manufacturability and reliability. It is suitable for high-speed interconnects, server interfaces, and other scenarios with high requirements for signal integrity.

[0046] The backplane connector of this invention includes the connection device 100 of any of the above embodiments, or includes the terminals in the embodiments.

[0047] The backplane connector of this invention has excellent high-frequency transmission performance, low impedance sensitivity to processing and assembly deviations, and improves product manufacturability and mass production yield, with more reliable and stable overall performance.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A connecting device, characterized in that, include: A first spring group and a second spring group. The first spring group includes two first springs with their width surfaces spaced apart and arranged opposite each other. The second spring group includes two second springs with their width surfaces spaced apart and arranged opposite each other. The width surfaces of the first springs and the second springs are arranged opposite each other, and the free ends of the first springs are attached to the second springs, and the free ends of the second springs are attached to the first springs.

2. The connecting device according to claim 1, characterized in that, The free end of the first spring forms a first bend, which bends toward a side away from the second spring, and / or the free end of the second spring forms a second bend, which bends toward a side away from the first spring.

3. The connecting device according to claim 1, characterized in that, A fitting portion is provided between the first spring and the second spring. The fitting portion is disposed on one of the first spring and the second spring and is fitted to the other of the first spring and the second spring. In a projection plane orthogonal to the width direction of the first spring, the fitting portion is located between the first spring and the second spring.

4. The connecting device according to claim 3, characterized in that, The bonding portion includes: The first bonding portion is disposed on the first spring piece and is bonded to the second spring piece. In a projection plane orthogonal to the width direction of the first spring piece, the first bonding portion is located between the first spring piece and the second spring piece. And / or, a second bonding portion, the second bonding portion being disposed on the second spring piece, the second bonding portion being bonded to the first spring piece, and the second bonding portion being located between the first spring piece and the second spring piece in a projection plane orthogonal to the width direction of the second spring piece.

5. The connecting device according to claim 1, characterized in that, The first spring includes a first segment, a second segment, and a first bend that are connected in sequence. The first segment extends in a direction adjacent to the second segment and is inclined in a direction away from the second spring. The two ends of the second segment are respectively connected to the first segment and the first bend. The second segment extends in a direction away from the first segment and is inclined in a direction adjacent to the second spring.

6. The connecting device according to claim 6, characterized in that, The second spring sheet includes a third segment, a fourth segment, and a second bent portion connected in sequence. The third segment extends in a direction adjacent to the fourth segment and is inclined in a direction away from the second spring sheet. The two ends of the fourth segment are respectively connected to the third segment and the second bent portion. The fourth segment extends in a direction away from the third segment and is inclined in a direction adjacent to the second spring sheet. The first bent portion is in contact with the third segment, and the second bent portion is in contact with the first segment.

7. The connecting device according to claim 6, characterized in that, The width of the first segment is greater than the width of the second segment and the width of the first bend, and / or the width of the third segment is greater than the width of the fourth segment and the width of the second bend.

8. The connecting device according to claim 1, characterized in that, It also includes a first shell and a second shell, with two first spring contacts disposed in the first shell and two second spring contacts disposed in the second shell. The first shell has a mounting cavity on the side facing the second shell, and the two first spring contacts are disposed inside the first shell. The second shell has a protrusion that passes through the mounting groove. Two second spring pieces are located on both sides of the protrusion and abut against both sides of the protrusion.

9. A terminal device, characterized in that, The connecting device includes any one of claims 1-8.

10. A backplane connector, characterized in that, It includes the connecting device as described in any one of claims 1-8, or the terminal as described in claim 9.

Images