Patent Description:
In a current communications system, an interconnection system based on a combination of a backplane and a subcard that are of a printed circuit board (printed circuit board, PCB) is a most common interconnection architecture. As a bridge between the backplane and the subcard, a signal connector is a key component that affects signal transmission. With continuous improvement of a signal transmission rate, a higher requirement is raised on transmitted signal integrity. A key factor that affects signal integrity is a shielding structure in the signal connector. A currently used shielding structure is only a metal shielding piece, and cannot achieve a good shielding effect. Therefore, a connector with a good shielding effect is needed to reduce signal crosstalk between signal terminals.

In addition, a ratio of a quantity of ground pins to a quantity of signal pins needs to be continuously increased, to ensure that a connector signal has a better return path. Usually, the ratio is ensured to be not less than <NUM>. Currently, in application of some connectors, a ground shielding module and a signal module are alternately disposed, to enable a shielding function between transmitted signals. In addition, a return path is also provided for the transmitted signal. Therefore, a design of the ground shielding module is very important.

Currently, the ground shielding module is usually designed as a separate shielding piece, to enable the ground shielding module to provide a good return current and reduce or avoid insertion loss resonance. Because the shielding piece is closer to a plane, that the plane is used as a signal return path helps reduce a loop self-inductance. Therefore, a transient impedance change that a signal faces is smaller, and impedance is easier to control. This helps reduce insertion loss ripples and the insertion loss resonance.

However, due to limitation of a size of a communications device, a separate design of the ground shielding module doubles a size of the connector, and assembly is more complex. In addition, when a differential signal terminal pair is disposed near an edge of the shielding piece, a signal between different terminal pairs can still cause coupling at an edge field outside the edge of the shielding piece.

Therefore, a signal connector with a new shielding structure needs to be urgently provided.

Further, <CIT> refers to a signal connector comprising a first plug-in connector and a second plug-in connector, wherein the first plug-in connector comprises a signal transmission unit comprising a signal transmission part, a first shielding component and a second shielding component, and a first matched fixing end for containing the signal transmission unit; the second plug-in connector comprises a second matched fixing end for containing a second signal terminal pair and a third shielding component; and when the first plug-in connector is in plug-in connection with the second plug-in connector, a first signal terminal pair and the second signal terminal pair are arranged in a connection way, the third shielding component and a first clamping joint of the signal transmission unit are arranged in a clamping way, the third shielding component is connected with the first shielding component and the second shielding component in a clamping way, so as to form an O-shaped shielding cavity structure coating the first signal terminal pair and the second signal terminal pair, and the O-shaped shielding cavity structure is used for shielding the signals transmitted by the first signal terminal pair and the second signal terminal pair. Document <CIT> discloses a signal connector comprising a plurality of subcard connection units , wherein each connection unit comprises a first and second grounding plates forming a cavity, wherein the first grounding plate of each connection unit comprises an elastic finger in the direction of the cavity configured to be pressed against a corresponding shielding piece of the first grounding plate of an adjacent connection unit.

This application provides a connector and a terminal device, to resolve a problem of signal crosstalk in a signal transmission process and to improve transmitted signal integrity. This problem is solved by the subject matter of the independent claim.

Further implementation forms are provided in the dependent claims.

According to an aspect, a signal connector is provided, including a backplane connection part. The backplane connection part includes a first base, and at least one through hole is disposed on a bottom surface of the first base. The backplane connection part includes at least one signal terminal pair. A first contact end of the first signal terminal pair is inserted into the through hole and fastened, and a second contact end is configured to combine with a second signal terminal pair located in a subcard connection unit. The backplane connection part includes at least one first shielding piece. The first shielding piece is disposed in parallel with the first signal terminal pair. The backplane connection part includes at least one subcard connection unit. The subcard connection unit includes at least one second signal terminal pair, including a first contact end. The second signal terminal pair and the first signal terminal pair are in a one-to-one correspondence. The backplane connection part includes a fastening module. The fastening module is configured to fasten the at least one second signal terminal pair. The at least one second signal terminal pair is arranged in parallel, and the first contact end of the second signal terminal pair extends outwards from a side surface of the fastening module. The subcard connection unit includes a second shielding piece. The second shielding piece is parallel to the second signal terminal pair and is disposed at a periphery of the second signal terminal pair, and the second shielding piece and the first shielding piece are in a one-to-one correspondence. When the subcard connection unit cooperates with the backplane connection part, the second contact end of the first signal terminal pair is combined with the first contact end of the second signal terminal pair in a one-to-one manner, and the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped.

According to the signal connector provided in embodiments of this application, the first shielding piece and the second shielding piece that cooperate with each other to form the shielding cavity when the backplane connection part cooperates with the subcard connection part are respectively disposed on the backplane connection part and the subcard connection unit, to form the shielding cavity at each signal terminal or a periphery of a signal terminal pair. This avoids crosstalk of signals transmitted on different signal terminals or signal terminal pairs, and part and the subcard connection unit, to form the shielding cavity at each signal terminal or a periphery of a signal terminal pair. This avoids crosstalk of signals transmitted on different signal terminals or signal terminal pairs, and improves transmitted signal integrity. In addition, a shielding piece is separately disposed on the backplane connection part and the subcard connection unit. This can reduce processing complexity and facilitate processing.

With reference to the first aspect, in some implementations of the first aspect, the first shielding piece and the second shielding piece are of a C-shaped, U-shaped, or L-shaped piece structure. That the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped includes: The first shielding piece cooperates with the second shielding piece, to form an annular shielding cavity that is wrapped around peripheries of the first signal terminal pair and the second signal terminal pair, or the first shielding piece cooperates with the second shielding piece, to form a rectangular shielding cavity that is wrapped around the peripheries of the first signal terminal pair and the second signal terminal pair.

According to the invention, the subcard connection unit further includes a third shielding piece and a fourth shielding piece. The third shielding piece and the fourth shielding piece respectively cover two sides of the fastening module, to form a first cavity that accommodates the second signal terminal pair.

With reference to the first aspect, in some implementations of the first aspect, at least one first protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction facing the first cavity, to enable the third shielding piece and the fourth shielding piece to form at least one contact position.

According to the signal connector provided in the embodiments of this application, protrusion structures facing each other are disposed on two side surfaces of the subcard connection unit, to enable the two side-surface shielding pieces to be connected through the protrusion structures. In this way, a signal return path can be increased, crosstalk between signals can be reduced, and signal integrity can be improved.

According to the invention, at least one second protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction opposite to the first cavity, to enable that when being disposed in parallel, a plurality of subcard connection units can be connected to each other through the at least one second protrusion.

According to the signal connector provided in the embodiments of this application, a protrusion structure in the direction opposite to the first cavity is disposed on at least one side surface of the subcard connection unit, to enable that when the plurality of subcard connection units are arranged in parallel, adjacent subcard connection units can be in contact with each other through the second protrusion. In this way, the signal return path is increased, the crosstalk between the signals is reduced, and the signal integrity is improved.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: At least one spring is disposed on the second shielding piece, and when the first shielding piece cooperates with the second shielding piece, the spring is in contact with a side surface of the second shielding piece.

According to the invention, a signal connector is provided, including a plurality of subcard connection units. The plurality of subcard connection units include a first cavity. Two opposite side surfaces of the first cavity are respectively a third shielding piece and a fourth shielding piece. At least one first protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction facing the first cavity, to enable the third shielding piece and the fourth shielding piece to form at least one contact position. The plurality of subcard connection units include at least one second signal terminal pair. The second signal terminal pair is disposed in the first cavity and is basically parallel to the third shielding piece and/or the fourth shielding piece. A first contact end of the second signal terminal pair extends outwards from a side surface of the first cavity. The plurality of subcard connection units include at least one second shielding piece. The second shielding piece is disposed in parallel with the second signal terminal pair, and the second shielding piece and a first shielding piece are in a one-to-one correspondence.

According to the signal connector provided in embodiments of this application, protrusion structures facing each other are disposed on two side surfaces of the subcard connection unit, to enable the two side-surface shielding pieces to be connected through the protrusion structures. In this way, a signal return path can be increased, crosstalk between signals can be reduced, and signal integrity can be improved.

With reference to the second aspect, in some implementations of the second aspect, the connector further includes a backplane connection part, including a first base. At least one through hole is disposed on a bottom surface of the first base. The backplane connection part includes at least one signal terminal pair. A first contact end of the first signal terminal pair is inserted into the through hole and fixed, and a second contact end is configured to combine with the first contact end of the second signal terminal pair. The backplane connection part includes at least one first shielding piece. The first shielding piece is disposed in parallel with the first signal terminal pair, and is wrapped around a periphery of the first signal terminal pair. When the subcard connection unit cooperates with the backplane connection part, the second contact end of the first signal terminal pair is combined with the first contact end of the second signal terminal pair in a one-to-one manner, and the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped.

According to the backplane connection part and the subcard connection unit provided in embodiments of this application, the first shielding piece and the second shielding piece that cooperate with each other to form the shielding cavity when the backplane connection part cooperates with the subcard connection part are respectively disposed on the backplane connection part and the subcard connection unit, to form the shielding cavity at each signal terminal or a periphery of a signal terminal pair. This avoids crosstalk of signals transmitted on different signal terminals or signal terminal pairs, and improves transmitted signal integrity. In addition, a shielding piece is separately disposed on the backplane connection part and the subcard connection unit. This can reduce processing complexity and facilitate processing.

With reference to the second aspect, in some implementations of the second aspect, the first shielding piece and the second shielding piece are of a C-shaped, U-shaped, or L-shaped piece structure. That the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped includes: The first shielding piece cooperates with the second shielding piece, to form an annular shielding cavity that is wrapped around peripheries of the first signal terminal pair and the second signal terminal pair, or the first shielding piece cooperates with the second shielding piece, to form a rectangular shielding cavity that is wrapped around the peripheries of the first signal terminal pair and the second signal terminal pair.

With reference to the second aspect, in some implementations of the second aspect, at least one second protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction opposite to the first cavity, to enable that when being disposed in parallel, a plurality of subcard connection units can be connected to each other through the at least one second protrusion.

According to the signal connector provided in the embodiments of this application, a protrusion structure in the direction opposite to the first cavity is disposed on at least one side surface of the subcard connection unit, to enable that when the plurality of subcard connection units are arranged in parallel, adjacent subcard connection units can be in contact with other through the second protrusion. In this way, the signal return path is increased, the crosstalk between the signals is reduced, and the signal integrity is improved.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: At least one spring is disposed on the second shielding piece, and when the first shielding piece cooperates with the second shielding piece, the spring is in contact with a side surface of the second shielding piece.

According to a third aspect, a signal connector is provided, including a plurality of subcard connection units. The plurality of subcard connection units include a first cavity. Two opposite side surfaces of the first cavity are respectively a third shielding piece and a fourth shielding piece, and at least one second protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction opposite to the first cavity, to enable that when being disposed in parallel on the backplane connection part, the plurality of subcard connection units can be connected to adjacent subcard connection units through the at least one second protrusion. The plurality of subcard connection units include at least one second signal terminal pair. The second signal terminal pair is disposed in the first cavity and is basically parallel to the third shielding piece and/or the fourth shielding piece. A first contact end of the second signal terminal pair extends outwards from a side surface of the first cavity. The plurality of subcard connection units include at least one second shielding piece. The second shielding piece is disposed in parallel with the second signal terminal pair, and the second shielding piece and a first shielding piece are in a one-to-one correspondence.

According to the signal connector provided in embodiments of this application, a protrusion structure in the direction opposite to the first cavity is disposed on at least one side surface of the subcard connection unit, to enable that when the plurality of subcard connection units are arranged in parallel, adjacent subcard connection units can be in contact with each other through the second protrusion. In this way, a signal return path is increased, crosstalk between signals is reduced, and signal integrity is improved.

With reference to the third aspect, in some implementations of the third aspect, the connector further includes a backplane connection part, including a first base. At least one through hole is disposed on a bottom surface of the first base. The backplane connection part includes at least one first signal terminal pair. A first contact end of the first signal terminal pair is inserted into the through hole and fixed, and a second contact end is configured to combine with the first contact end of the second signal terminal pair. The backplane connection part includes at least one first shielding piece. The first shielding piece is disposed in parallel with the first signal terminal pair. When the subcard connection unit cooperates with the backplane connection part, the second contact end of the first signal terminal pair is combined with the first contact end of the second signal terminal pair in a one-to-one manner, and the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped.

With reference to the third aspect, in some implementations of the third aspect, the first shielding piece and/or the second shielding piece is of a C-shaped, U-shaped, or L-shaped piece structure. That the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped includes: The first shielding piece cooperates with the second shielding piece, to form an annular shielding cavity that is wrapped around peripheries of the first signal terminal pair and the second signal terminal pair, or the first shielding piece cooperates with the second shielding piece, to form a rectangular shielding cavity that is wrapped around the peripheries of the first signal terminal pair and the second signal terminal pair.

With reference to the third aspect, in some implementations of the third aspect, at least one first protrusion is disposed on the third shielding piece and/or the fourth shielding piece in a direction facing the first cavity, to enable the third shielding piece and the fourth shielding piece to form at least one contact position.

According to the signal connector provided in the embodiments of this application, protrusion structures facing each other are disposed on two side surfaces of the subcard connection unit, to enable the two side-surface shielding pieces to be connected through the protrusion structures. In this way, the signal return path can be increased, the crosstalk between signals can be reduced, and the signal integrity can be improved.

With reference to the third aspect, in some implementations of the third aspect, the method further includes: At least one spring is disposed on the second shielding piece, and when the first shielding piece cooperates with the second shielding piece, the spring is in contact with a side surface of the second shielding piece.

According to a fourth aspect, a terminal device is provided. The terminal device includes the signal connector according to any one of the first aspect to the third aspect.

A signal connector provided in this application may be used in a PCB-based interconnection system combining a backplane and a subcard.

<FIG> is a schematic structural diagram of a signal connector according to an embodiment of this application. As shown in <FIG>, the signal connector <NUM> includes a backplane connection part <NUM> and a subcard connection unit <NUM>. There may be a plurality of subcard connection units <NUM>, and the backplane connection part <NUM> and the subcard connection unit <NUM> may cooperate with each other as shown in <FIG>, to form the signal connector <NUM>.

<FIG> is a schematic structural diagram of a backplane connection part according to an embodiment of this application. The backplane connection part <NUM> may be formed by assembling a first base <NUM>, at least one first signal terminal pair <NUM> (not shown in <FIG>) disposed on the first base <NUM>, and at least one first shielding piece <NUM>. The following describes a specific structure of the backplane connection part <NUM> with reference to the accompanying drawing.

<FIG> is a schematic structural diagram of a backplane connection part according to an embodiment of this application. Components of the backplane connection part <NUM> are: a first base <NUM>, at least one first signal terminal <NUM>, at least one first shielding piece <NUM>, an electroplated plastic plate <NUM>, and a metal piece <NUM>.

The first base <NUM> is an insulated housing of a main accommodation cavity structure. The first base <NUM> is configured to provide strength support for a connector, and provide guidance for cooperation between the first base <NUM> and a subcard connection unit <NUM> that are of the connector. A plurality of through holes <NUM> are disposed on a bottom surface of the first base <NUM>. The through hole <NUM> is configured to fasten the first signal terminal <NUM>.

Optionally, a quantity of through holes <NUM> is corresponding to a quantity of first signal terminal pairs <NUM>, and a shape and a size of the through hole <NUM> are in a one-to-one correspondence with a shape and a size of a first contact end of the first signal terminal pair <NUM>, so that the first signal terminal pair <NUM> can be inserted into and fastened to the through hole <NUM>.

The first signal terminal pair <NUM>: The first signal terminal pair <NUM> may be a differential signal terminal pair. The first signal terminal pair <NUM> is configured to transmit a signal, and the first signal terminal pair <NUM> includes the first contact end and a second contact end. The first contact end is inserted into the through hole <NUM>, so that the first signal terminal pair <NUM> is fastened on the bottom surface of the first base <NUM>. The second contact end is configured to: when the backplane connection part <NUM> cooperates with the subcard connection unit <NUM>, combine with a first contact end of a second signal terminal pair <NUM>. A specific combining manner is described in the following. In addition, it should be understood that, if a single signal terminal or a plurality of signal terminals are used in application, a signal connector structure provided in this embodiment of this application may also be applied.

The first shielding piece <NUM>: The first shielding piece <NUM> is in a one-to-one correspondence with the first signal terminal pair <NUM>, to be specific, one first shielding piece <NUM> is disposed at a periphery of one first signal terminal pair <NUM>. In addition, the first shielding piece <NUM> is wrapped around the periphery of the first signal terminal pair <NUM>, and is distributed in a cross manner with the first signal terminal <NUM>. The first shielding piece <NUM> is configured to form an isolation barrier between the first signal terminal pairs <NUM> to avoid interference between signals.

For example, as shown in <FIG>, the first shielding piece <NUM> may be disposed, in parallel with the first signal terminal pair <NUM>, on the bottom surface of the first base <NUM>. Specifically, both the first signal terminal pair <NUM> and the first shielding piece <NUM> may be perpendicular to the bottom surface of the first base <NUM>. The first shielding piece <NUM> is disposed at the periphery of the first signal terminal pair <NUM>, and the first signal terminal pair <NUM> corresponding to the first shielding piece <NUM> is wrapped inside the first shielding piece <NUM>.

Optionally, the first shielding piece <NUM> may have a plurality of structures. For example, the first shielding piece <NUM> may be of a C-shaped piece-like structure shown in <FIG>, or may be of a U-shaped piece-like structure, an L-shaped piece-like structure, or the like. This is not limited in this application.

It should be understood that the backplane connection part <NUM> includes the foregoing parts. For example, the first contact end of the first signal terminal pair <NUM> is inserted into a corresponding through hole on the bottom surface of the first base <NUM>, so that the first signal terminal pair <NUM> is perpendicularly fastened on the bottom surface of the first base <NUM>. The first shielding piece <NUM> is parallel to the first signal terminal pair <NUM> and fastened on the bottom surface of the first base <NUM>, and is configured to isolate the first signal terminal pairs <NUM>. The first shielding piece <NUM> is in the one-to-one correspondence with the first signal terminal pair <NUM> and is not in contact with the first signal terminal pair <NUM>. The electroplated plastic plate <NUM> and the metal piece <NUM> are respectively disposed on two sides of the bottom surface of the first base <NUM>. A through hole that enables the first signal terminal pair <NUM> and the first shielding piece <NUM> to pass through is disposed on the metal piece. In this way, the metal piece <NUM> can pass through the first signal terminal pairs <NUM> and the first shielding pieces <NUM> and be fastened above the base. Similarly, a through hole corresponding to the through hole <NUM> of the base may be disposed on the electroplated plastic plate, and the electroplated plastic plate is fastened under the base.

<FIG> is a schematic structural diagram of a subcard connection unit according to an embodiment of this application. As shown in <FIG>, the subcard connection unit <NUM> includes at least one second signal terminal pair <NUM>, at least one second shielding piece <NUM>, a third shielding piece <NUM> and a fourth shielding piece <NUM> that cover the second signal terminal pair <NUM> and the second shielding piece <NUM>, and a fastening module <NUM>.

The second signal terminal pair <NUM>: The second signal terminal pair <NUM> may be a differential signal terminal pair. The second signal terminal pair <NUM> is configured to transmit a signal, and includes a first contact end and a second contact end. The first contact end is configured to combine with a second contact end of a first signal terminal <NUM> when a backplane connection part <NUM> cooperates with the subcard connection unit <NUM>. In addition, it should be understood that, if a single signal terminal or a plurality of signal terminals are used in actual application, a signal connector structure provided in this embodiment of this application may also be applied.

The second shielding piece <NUM>: The second shielding piece <NUM> may be disposed in parallel with the second signal terminal pair <NUM>, and disposed between the third shielding piece <NUM> and the fourth shielding piece <NUM>, that is, the third shielding piece <NUM>, the second shielding piece <NUM>, and the fourth shielding piece <NUM> are arranged from top to bottom, and are fastened together by riveting or in another manner. The third shielding piece <NUM> may be used as a first plane for signal backflow, the second shielding piece <NUM> may be used as a second plane for the signal backflow, and the fourth shielding piece <NUM> may be used as a third plane for the signal backflow. In this way, a signal can be flowed back through a closest ground shielding piece, and this improves a crosstalk resonance point of a signal connector.

Optionally, the second shielding piece <NUM> has a structure corresponding to the first shielding piece <NUM>. Therefore, when the backplane connector <NUM> and the subcard connector <NUM> cooperate with each other, the first shielding piece <NUM> and the second shielding piece <NUM> can form, by sleeving, plugging, buckling, or the like, a shielding cavity in which a first signal terminal pair <NUM> and a second signal terminal pair <NUM> are wrapped. Because the second shielding piece <NUM> and the first shielding piece <NUM> have different structures, correspondingly, the shielding cavity has different shapes in appearance. For example, the shielding cavity may be an annular shielding cavity. In this case, the first signal terminal pair <NUM> and the second signal terminal pair <NUM> are located inside the annular shielding cavity. Alternatively, the shielding cavity may be a rectangular shielding cavity, that is, a cross section of the shielding cavity is in a rectangular shape, and the like. The shape of the shielding cavity is not limited in this application.

Optionally, the second shielding piece <NUM> is a C-shaped, U-shaped, or L-shaped piece structure.

Optionally, a half-wrapped shielding structure <NUM> corresponding to a shape and a position of the second signal terminal pair <NUM> may be disposed on the second shielding piece <NUM>. Specifically, the shielding structure <NUM> may be a plurality of C-shaped, U-shaped, or L-shaped shielding piece structures arranged in parallel. A connection position <NUM> may be disposed on each shielding piece structure at intervals.

The third shielding piece <NUM> and the fourth shielding piece <NUM> may form, in a mating surface near the backplane connector <NUM> and the subcard connection unit <NUM>, a first cavity together with a local structure of the fastening module <NUM>. Preferably, the first cavity is a cubic cavity, the third shielding piece <NUM> and the fourth shielding piece <NUM> are two opposite side surfaces of the first cavity, and the second signal terminal pair <NUM> and the second shielding piece <NUM> are both disposed inside the first cavity.

The fastening module <NUM>: The fastening module <NUM> may be a terminal plastic injection module, and is configured to fasten the second signal terminal pair <NUM>. For ease of description, a part formed by the fastening module <NUM> and the second signal terminal is referred to as a signal transmission part.

The following describes a structure of the subcard connection unit <NUM> in detail with reference to the accompanying drawings.

<FIG> are schematic structural diagrams of different components of a subcard connection unit according to an embodiment of this application.

<FIG> is a schematic structural diagram of a signal transmission part of a subcard connection unit according to this application.

The signal transmission part includes at least one second signal terminal pair <NUM> and a fastening module <NUM>. Specifically, as shown in <FIG>, a plurality of second signal terminal pairs <NUM> may be arranged on the fastening module <NUM> in parallel, and the second signal terminal pairs <NUM> are connected and fastened through the fixing module <NUM>. In addition, a first contact end of the second signal terminal pair <NUM> extends outwards from one side surface of the fastening module <NUM>.

Optionally, the first contact end of the second signal terminal pair <NUM> is corresponding to a second contact end of a first signal terminal pair <NUM>. For example, a spacing, a structure, and the like of the first contact end of the second signal terminal pair <NUM> are separately corresponding to that of the second contact end of the first signal terminal pair <NUM>. That is, when a backplane connection part <NUM> cooperates with a subcard connection unit <NUM>, the first contact end of the second signal terminal pair <NUM> can be correspondingly combined with the second contact end of the first signal terminal pair <NUM>, to form a signal transmission path. This ensures normal signal transmission.

<FIG> is a schematic structural diagram of a third shielding piece in the subcard connection unit according to this application. <FIG> is a schematic structural diagram of a fourth shielding piece in the subcard connection unit according to this application.

The third shielding piece <NUM> and the fourth shielding piece <NUM> separately cover the signal transmission part formed by the second signal terminal pair <NUM> and the fastening module <NUM>. The third shielding piece <NUM>, the fourth shielding piece <NUM>, and the side surface of the fastening module <NUM> jointly form a first cavity. The third shielding piece <NUM> may be used as a lower bottom surface of the first cavity, and the fourth shielding piece <NUM> may be used as an upper bottom surface of the first cavity, to wrap the second signal terminal pair <NUM> in the first cavity.

Optionally, a plurality of first protrusion structures <NUM> in a direction facing inside the first cavity are further disposed on the third shielding piece <NUM>, and/or a plurality of first protrusion structures <NUM> in the direction facing inside the first cavity are further disposed on the fourth shielding piece <NUM>.

Optionally, a plurality of through holes <NUM> are further disposed on the third shielding piece <NUM> and/or the fourth shielding piece <NUM>. Therefore, when the third shielding piece <NUM> and the fourth shielding piece <NUM> are assembled into the first cavity, the third shielding piece <NUM> and the fourth shielding piece <NUM> may be fastened through the through hole by a component such as a rivet.

Optionally, a plurality of second protrusions <NUM> in a direction opposite to the first cavity may be disposed on the third shielding piece <NUM>, and/or a plurality of second protrusions <NUM> in the direction opposite to the first cavity may be disposed on the fourth shielding piece <NUM>. When the plurality of subcard connection units <NUM> are arranged in parallel, adjacent subcard connection units <NUM> are connected to each other through the second protrusion.

<FIG> is a schematic structural diagram of a second shielding piece in the subcard connection unit according to this application.

A structure of the second shielding piece <NUM> is corresponding to a structure of a first shielding piece <NUM>. When the backplane connection part <NUM> cooperates with the subcard connection unit <NUM>, the first shielding piece <NUM> and the corresponding second shielding piece <NUM> may form, by plugging, sleeving, buckling, or the like, a shielding cavity in which the first signal terminal pair <NUM> and the second signal terminal pair <NUM> are wrapped.

It should be understood that the second shielding piece <NUM> may have a plurality of structures. The structure of the second shielding piece <NUM> may be corresponding to that of the second signal terminal pair <NUM> and that of the fastening module <NUM>. In other words, when the second shielding piece <NUM> is combined with the second signal terminal pair <NUM> and the terminal plastic injection module <NUM>, the second shielding piece <NUM> may be parallel to the second signal terminal pair <NUM> and fastened on the fastening module <NUM>, and the second shielding piece <NUM> is disposed at a periphery of the second signal terminal pair <NUM>. The second shielding piece <NUM> partially wraps the second signal terminal pair <NUM>.

According to the backplane connection part <NUM> and the subcard connection unit <NUM> provided in this embodiment of this application, the first shielding piece <NUM> and the second shielding piece <NUM> that cooperate with each other to form the shielding cavity when the backplane connection part <NUM> cooperates with the subcard connection part <NUM> are respectively disposed on the backplane connection part <NUM> and the subcard connection unit <NUM>, to form the shielding cavity at each signal terminal or a periphery of a signal terminal pair. This avoids crosstalk of signals transmitted on different signal terminals or signal terminal pairs, and improves transmitted signal integrity. In addition, a shielding piece is separately disposed on the backplane connection part <NUM> and the subcard connection unit <NUM>. This can reduce processing complexity and facilitate processing.

<FIG> is a schematic structural diagram of a subcard connection unit according to an embodiment of this application.

<FIG> is a side view of the subcard connection unit in an A-A direction in <FIG>.

It should be understood that, as described above, the subcard connection unit <NUM> may be formed by assembling a second signal terminal pair <NUM>, a second shielding piece <NUM>, a third shielding piece <NUM>, a fourth shielding piece <NUM>, and a fastening module <NUM>. The third shielding piece <NUM>, the fourth shielding piece <NUM>, and the terminal plastic injection module <NUM> form a first cavity. The third shielding piece <NUM> and the fourth shielding piece <NUM> are two opposite side surfaces of the first cavity.

Optionally, at least one protrusion structure in a direction facing inside the first cavity is disposed on the third shielding piece <NUM> and/or the fourth shielding piece <NUM>, so that when being used as the two opposite side surfaces of the first cavity, the third shielding piece <NUM> and the fourth shielding piece <NUM> may be in contact through the at least one first protrusion. Specifically, at least one first protrusion structure <NUM> in the direction facing inside the first cavity is disposed on the third shielding piece <NUM>, and the fourth shielding piece <NUM> is a planar structure. In addition, a height of the first protrusion structure <NUM> just enables the first protrusion structure <NUM> to be connected to the fourth shielding piece <NUM>, namely, in this case, the height of the first protrusion structure <NUM> is equivalent to a thickness of the first cavity. Alternatively, at least one first protrusion structure <NUM> in the direction facing inside the first cavity is disposed on the fourth shielding piece <NUM>, and the third shielding piece <NUM> is the planar structure. A height of the first protrusion structure <NUM> just enables the first protrusion structure <NUM> to be connected to the third shielding piece <NUM>, namely, in this case, the height of the first protrusion structure <NUM> is equivalent to the thickness of the first cavity. Alternatively, at least one protrusion structure (the first protrusion structures <NUM> and <NUM>) is disposed on both the third shielding piece <NUM> and the fourth shielding piece <NUM>. In addition, a position of the protrusion structure on the third shielding piece <NUM> is corresponding to a position of the protrusion structure on the fourth shielding piece <NUM>. Therefore, when the third shielding piece <NUM> and the fourth shielding piece <NUM> can be assembled into the two opposite side surfaces of the first cavity, the protrusion structure on the third shielding piece <NUM> is connected to the protrusion structure in a corresponding position on the fourth shielding piece <NUM>. In addition, a sum of the height of the protrusion structure on the third shielding piece <NUM> and the height of the protrusion structure in the corresponding position on the fourth shielding piece <NUM> is exactly the thickness of the first cavity.

According to the subcard connection unit provided in this embodiment, there is at least one connection part on a relative side surface of the subcard connection unit. This can increase a signal backflow path and improves integrity in a signal transmission process.

<FIG> is a schematic structural diagram of another subcard connection unit according to an embodiment of this application.

It can be seen that a second protrusion structure is disposed on a surface of a shielding piece of the subcard connection unit provided in this embodiment. Therefore, when a plurality of subcard connection units cooperate with a backplane connection part, adjacent subcard connection units <NUM> arranged in parallel may be connected to each other through the second protrusion structure, to implement electrical conduction. To be specific, third shielding pieces <NUM> and fourth shielding pieces <NUM> of all subcard connection units in a connector may be connected through the second protrusion structure, to improve a crosstalk resonance point of the connector <NUM>. A schematic structure in which the adjacent subcard connection units <NUM> are connected to each other through the second protrusion structure is shown in <FIG>.

Optionally, the second protrusion structure may be a protrusion structure disposed on a surface of the third shielding piece <NUM>, and protrudes in a direction opposite to a first cavity; and/or the second protrusion structure may be a protrusion structure (for example, a protrusion <NUM> shown in <FIG>) disposed on a surface of the fourth shielding piece <NUM>, and protrudes in the direction opposite to the first cavity.

Optionally, the second protrusion structure and a second signal terminal pair <NUM> may have a same or similar shape, a same or similar direction, and the like. For example, as shown in <FIG>, the second protrusion structure may be parallel to the second signal terminal pair <NUM> and disposed at a projection position of the second signal terminal pair <NUM> on the surface of the third shielding piece <NUM> and/or the surface of the fourth shielding piece <NUM>. In this way, a second protrusion at a closest position may be selected as a signal return path for a transmitted signal.

It should be understood that the second protrusion structure is disposed to implement electrical conduction between the third shielding piece <NUM> and the fourth shielding piece <NUM> of each subcard connection unit <NUM>. A specific shape, location, size, and the like of the second protrusion structure are not limited to those shown in <FIG>.

<FIG> is a schematic structural diagram of a shielding piece according to an embodiment of this application. The shielding piece shown in <FIG> may be the first shielding piece <NUM> or the second shielding piece <NUM> described above.

As described above, when a backplane connection part <NUM> and a subcard connection unit <NUM> are assembled, the first shielding piece <NUM> and the second shielding piece <NUM> are assembled as a shielding cavity wrapped around a periphery of a first signal terminal pair <NUM> and a second signal terminal pair <NUM>. The first shielding piece <NUM> and the second shielding piece <NUM> may be assembled by sleeving, plugging, buckling, or the like. The first shielding piece <NUM> and the second shielding piece <NUM> may be in contact with each other by assembling the first shielding piece <NUM> and the second shielding piece <NUM>.

For example, at least one metal spring is disposed on at least one side surface of the first shielding piece <NUM>, and when the first shielding piece <NUM> is sleeved or plugged with the second shielding piece <NUM>, a contact point can be formed between the first shielding piece <NUM> and the second shielding piece <NUM> through the metal spring, so that the first shielding piece <NUM> and the second shielding piece <NUM> form at least one contact position; and/or, at least one metal spring is disposed on at least one side surface of the second shielding piece <NUM>, and when the second shielding piece <NUM> is sleeved or plugged with the first shielding piece <NUM>, a contact point is formed between the second shielding piece <NUM> and the first shielding piece <NUM> through the metal spring plate, so that the first shielding piece <NUM> and the second shielding piece <NUM> form at least one contact position. <FIG> is a schematic diagram of the contact position formed between the first shielding piece <NUM> and the second shielding piece <NUM> through the metal spring.

It should be understood that, in this application, a size of the first shielding piece <NUM> and a size of the second shielding piece <NUM> may be further set to enable that when being sleeved or plugged, the first shielding piece <NUM> and the second shielding piece <NUM> may be just in contact through the side surface, to implement connection between the first shielding piece <NUM> and the second shielding piece <NUM>. To enable the first shielding piece <NUM> and the second shielding piece <NUM> to be in contact with each other after being assembled, there may be a plurality of specific structures of the first shielding piece <NUM> and/or the second shielding piece <NUM>. This is not limited in this application.

Claim 1:
A signal connector (<NUM>) comprising a plurality of subcard connection units (<NUM>), wherein the subcard connection units (<NUM>) comprise:
• a first cavity, wherein two opposite side surfaces of the first cavity are respectively a third shielding piece (<NUM>) and a fourth shielding piece (<NUM>), and at least one second protrusion is disposed on the third shielding piece (<NUM>) and/or the fourth shielding piece (<NUM>) in a direction opposite to the first cavity, to enable that when being disposed in parallel on a backplane connection part (<NUM>), the plurality of subcard connection units (<NUM>) can be connected to adjacent subcard connection units through the at least one second protrusion;
• at least one second signal terminal pair (<NUM>), wherein the second signal terminal pair (<NUM>) is disposed in the first cavity and is basically parallel to the third shielding piece (<NUM>) and/or the fourth shielding piece (<NUM>), and a first contact end of the second signal terminal pair (<NUM>) extends outwards from a side surface of the first cavity; and
• at least one second shielding piece (<NUM>), wherein the second shielding piece (<NUM>) is disposed in parallel with the second signal terminal pair (<NUM>), and the second shielding piece (<NUM>) is corresponding to a first shielding piece (<NUM>),
wherein the third shielding piece and the fourth shielding piece and the plurality of subcard connection units are connected through the at least one second protrusion.