CN212304122U - USB concentrator - Google Patents

Abstract

The utility model discloses a USB concentrator, including the USB interface, the power cord, the PCB board, USB socket and casing, the USB interface passes through the power cord and is connected with the PCB board, the PCB board front side sets up a plurality of USB sockets, the casing sets up IN the PCB board outside and set up the through-hole corresponding with USB socket on the casing, all set up the buffer circuit IN USB interface and USB socket department, the buffer circuit includes input IN, magnetic bead FB, first electric capacity C1, second electric capacity C2, third electric capacity C3, transient state diode D, output OUT and earthing terminal GND, set up magnetic bead FB between input IN and the output OUT, set up parallel connection's first electric capacity C1 between input IN and the earthing terminal GND, second electric capacity C2 and transient state diode D, set up third electric capacity C3 between output OUT and the earthing terminal GND. The utility model discloses a set up buffer circuit in USB interface and USB socket department, reduced the influence that source end input power source's interference caused follow-up circuit, strengthened the protecting effect, make the circuit more stable.

Description

USB concentrator

Technical Field

The utility model relates to a network equipment technical field especially relates to USB concentrator.

Background

The USB hub is widely applied among electronic devices, and has the main function of expanding one USB interface into a plurality of USB interfaces which work independently to realize relatively independent connection of a single interface and a plurality of devices.

At present, USB expanders in the market are generally in commercial grade, and have no way of well protecting various interference signals, lightning surge and the like in industrial environment, so that the stability of a circuit is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a USB concentrator has solved one or more among the prior art problem.

The utility model provides a USB concentrator, which comprises a USB interface, a power line, a PCB board, USB sockets and a shell, wherein the USB interface is connected with the PCB board through the power line, the front surface of the PCB board is provided with a plurality of USB sockets, the shell is arranged at the outer side of the PCB board and is provided with through holes corresponding to the USB sockets,

all set up isolation circuit at USB interface and USB socket, isolation circuit includes input IN, magnetic bead FB, first electric capacity C1, second electric capacity C2, third electric capacity C3, transient state diode D, output OUT and ground terminal GND, set up magnetic bead FB between input IN and the output OUT, set up parallel connection's first electric capacity C1 between input IN and the ground terminal GND, second electric capacity C2 and transient state diode D, set up third electric capacity C3 between output OUT and the ground terminal GND.

The beneficial effects are as follows: through set up the magnetic bead, first electric capacity, second electric capacity, third electric capacity and the buffer circuit that transient state diode constitutes at USB interface and USB socket department, weaken the interference on the input power and cause the influence to follow-up circuit, the protective effect is better, makes the circuit more stable.

In some embodiments, a shield wire loop is disposed on the PCB board. Therefore, one end of the shielding wire is connected to the shielding wire ring, and the other end of the shielding wire is grounded, so that the existence of interference signals is reduced, and the anti-interference performance is improved.

In some embodiments, the housing is made of aluminum. Therefore, the aluminum shell is conducted with the ground wire, the interference signal is conducted to the ground, the interference signal is further reduced, and the anti-interference performance is improved.

In some embodiments, the housing includes a main body having an opening at one side thereof, the PCB board is disposed inside the main body, and a cover plate covering the opening of the main body.

In some embodiments, the four corners of the cover plate are respectively provided with mounting holes.

In some embodiments, the bottom of the housing is provided with a through hole for passing a power line.

In addition, in the technical solutions of the present invention, the technical solutions can be implemented by adopting conventional means in the art, which are not specifically described.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a USB hub according to an embodiment of the present invention.

Fig. 2 is a circuit diagram of an isolation circuit in the USB hub according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a PCB board in the USB hub according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of but not limiting of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and may be used for purposes of simplicity in more clearly distinguishing between different components and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in FIGS. 1 to 3, the utility model provides a USB concentrator, which comprises a USB interface 1, a power cord 2, a PCB 3, USB sockets 4 and a shell 5, wherein the USB interface 1 is connected with the PCB 3 through the power cord 2, the PCB 3 is provided with a plurality of USB sockets 4 on the front surface, the shell 5 is arranged on the outer side of the PCB 3 and the shell 5 is provided with through holes 6 corresponding to the USB sockets 4,

all set up isolation circuit at USB interface 1 and USB socket 4 department, isolation circuit includes input IN, magnetic bead FB, first electric capacity C1, second electric capacity C2, third electric capacity C3, transient diode D, output OUT and ground terminal GND, set up magnetic bead FB between input IN and the output OUT, set up parallel connection's first electric capacity C1 between input IN and the ground terminal GND, second electric capacity C2 and transient diode D, set up third electric capacity C3 between output OUT and the ground terminal GND.

IN an alternative embodiment, the input terminal IN may be connected to a 5V power supply accessed from the USB interface 1 or the USB socket 4, and the output terminal OUT may be connected to a power supply input terminal of other circuits IN the USB hub.

In an alternative embodiment, the number of the USB sockets 4 may be adjusted according to actual situations, and an isolation circuit is disposed at each USB socket 4.

In an alternative embodiment, the magnetic bead FB is selected from BLM18EG221SN1, and is disposed in the circuit to absorb the uhf signal.

In an alternative embodiment, the first capacitor C1 is an electrolytic capacitor of 22 μ F/50V, the second capacitor C2 is a 0.1 μ F patch capacitor, and the third capacitor C3 is a 1000pF patch capacitor. Therefore, the effect of filtering can be realized, high-frequency ripples can be removed, and the filtering effect is better.

In an alternative embodiment, the transient diode D is a TVS transistor model SMBJ6.5CA. Therefore, the precise component in the circuit can be effectively protected, and damage of surge pulse is avoided.

In an alternative embodiment, the shield wire loop 7 is provided on the PCB board 3. Therefore, one end of the shielding wire is connected to the shielding wire ring, and the other end of the shielding wire is grounded, so that the existence of interference signals is reduced, and the anti-interference performance is improved.

In an alternative embodiment, the housing 5 is made of aluminum. Therefore, the aluminum shell is conducted with the ground wire, the interference signal is conducted to the ground, the interference signal is further reduced, and the anti-interference performance is improved.

In an alternative embodiment, the housing 5 includes a main body 51 and a cover plate 52, one side of the main body 51 is open, the PCB board 3 is disposed inside the main body 51, and the cover plate 52 covers the opening of the main body 51.

In an alternative embodiment, the cover plate 52 is provided with mounting holes 53 at four corners.

In an alternative embodiment, the bottom of the housing 5 is provided with a through hole for passing the power cord 2. The shape of the through hole can be set to be circular, so that the shape of the power line can be better matched.

The utility model provides a USB concentrator is through setting up the isolating circuit who comprises magnetic bead FB, first electric capacity C1, second electric capacity C2, third electric capacity C3 and transient state diode D to set up isolating circuit in USB interface 1 and USB socket 4 departments, reduced the influence that source input power source's interference caused follow-up circuit, strengthened the protecting effect, make the circuit more stable.

The above embodiments of the present invention are only intended to illustrate the technical solutions of the present invention, but not to limit the same, it should be understood that, for those skilled in the art, modifications or substitutions can be made according to the above description without departing from the inventive concept, and all such modifications and substitutions shall fall within the scope of the appended claims. In this case all the details may be replaced with equivalent elements, and the materials, shapes and dimensions may be any.

Claims (6)

1. A USB hub, characterized in that,

   comprises a USB interface (1), a power line (2), a PCB (3), USB sockets (4) and a shell (5), wherein the USB interface (1) is connected with the PCB (3) through the power line (2), the PCB (3) is provided with a plurality of the USB sockets (4) on the front surface, the shell (5) is arranged on the outer side of the PCB (3) and the shell (5) is provided with through holes (6) corresponding to the USB sockets (4),

   the USB interface (1) and the USB socket (4) are respectively provided with an isolation circuit, the isolation circuit comprises an input end IN, a magnetic bead FB, a first capacitor C1, a second capacitor C2, a third capacitor C3, a transient diode D, an output end OUT and a ground end GND, the magnetic bead FB is arranged between the input end IN and the output end OUT, the first capacitor C1, the second capacitor C2 and the transient diode D which are connected IN parallel are arranged between the input end IN and the ground end GND, and the third capacitor C3 is arranged between the output end OUT and the ground end GND.
2. 2. USB hub according to claim 1, characterized in that a shield wire loop (7) is provided on the PCB board (3).
3. 3. USB hub according to claim 1, wherein the housing (5) is made of aluminium.
4. 4. The USB hub according to claim 1, wherein the housing (5) comprises a main body (51) and a cover plate (52), the main body (51) is open on one side, the PCB board (3) is disposed inside the main body (51), and the cover plate (52) covers the opening of the main body (51).
5. 5. The USB hub according to claim 4, wherein the cover plate (52) is provided with mounting holes (53) at four corners, respectively.
6. 6. USB hub according to claim 1, wherein the housing (5) is provided with a through hole at the bottom for the power supply line (2) to pass through.

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