CN217821572U

CN217821572U - KVM switching device supporting hot key function

Info

Publication number: CN217821572U
Application number: CN202221927370.6U
Authority: CN
Inventors: 张炜翔
Original assignee: Shenzhen Haiying Zhilian Industrial Co ltd
Current assignee: Shenzhen Haiying Zhilian Industrial Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-15
Anticipated expiration: 2032-07-20

Abstract

The utility model provides a support KVM auto-change over device of hotkey function, include: the video switching device comprises a plurality of first VGA interfaces and first USB interfaces for connecting a computer, a second VGA interface for connecting a display, a video switching unit respectively connected with the second VGA interface and the first VGA interfaces, a USB signal switching unit connected with the first USB interface, a KVM controller respectively connected with the USB signal switching unit and the video switching unit, a USB concentrator respectively connected with the video switching unit and the KVM controller, a plurality of second USB interfaces connected with the KVM controller, and a plurality of third USB interfaces connected with the USB concentrator. And the equipment connected with the second VGA interface, the second USB interface and the third USB interface is used by a plurality of computers. And the USB concentrator can be used for expanding a plurality of third USB interfaces, so that a user can conveniently use the third USB interfaces by externally connecting equipment such as a printer, a card reader, a hard disk, a U disk and the like, the performance of a computer is improved, and the practicability of the KVM switching device is improved.

Description

KVM switching device supporting hot key function

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the technique of computer peripheral equipment and specifically relates to a KVM auto-change over device who supports hotkey function is related to.

[ background of the invention ]

As is well known, a KVM switch, also called a KVM controller, can implement a set of mouse, keyboard, and display screen for 2, 3, 4, etc. more computers or servers, so as to facilitate users who need to use multiple computers, and reduce the occupied space for configuring a set of mouse, keyboard, and display screen on a host. However, the existing KVM switch only has the function of switching computers, and is not suitable for other devices, and cannot meet the requirements of users.

Accordingly, the prior art is in need of improvement and development.

[ Utility model ] content

An object of the utility model is to provide a KVM switch device of support hotkey function for solve current KVM switch function singleness and can not satisfy user's demand.

The technical scheme of the utility model as follows: a KVM switch supporting hotkey functionality, comprising: the video display system comprises a plurality of first VGA interfaces used for connecting a computer, a second VGA interface used for connecting a display, a video screen switching unit respectively connected with the second VGA interface and the first VGA interfaces, a plurality of first USB interfaces used for connecting the computer, a USB signal switching unit connected with the first USB interface, a KVM controller respectively connected with the USB signal switching unit and the video switching unit, a USB concentrator respectively connected with the video switching unit and the KVM controller, a plurality of second USB interfaces connected with the KVM controller and a plurality of third USB interfaces connected with the USB concentrator;

the second USB interface is used for connecting one of a keyboard and a mouse, the KVM controller supports keyboard hot key switching, the KVM controller outputs switching signals to the video switching unit and the USB signal switching unit respectively according to signals fed back by the keyboard, the video switching unit connects one of the first VGA interfaces with the second VGA interface according to the switching signals, the USB signal switching unit connects one of the first USB interfaces with the USB hub and the KVM controller respectively according to the switching signals, and the USB hub is used for expanding a group of USB signals input by the KVM controller into a plurality of groups of USB signals and supplying the USB signals to a third USB interface.

Furthermore, the KVM switch device further comprises a power circuit connected with the first USB interface, wherein the power circuit obtains power from the computer through the first USB interface, rectifies and filters the power input from the first USB interface, and then respectively outputs the power to the second VGA interface, the second USB interface, the third USB interface, the video switch unit, the USB hub, and the USB signal switch unit.

Furthermore, the video switching unit comprises a first analog switch chip respectively connected with the first VGA interface, the second VGA interface, the power circuit and the KVM controller, and the first analog switch chip connects one of the first VGA interfaces with the second VGA interface according to a switching signal output by the KVM controller.

Furthermore, the USB signal switching unit includes a second analog switch chip respectively connected to the power circuit, the KVM controller, and the first USB interface.

Furthermore, the KVM switch device further includes a detection circuit respectively connected to the KVM controller and a first VGA interface, and the detection circuit feeds back a first signal to the KVM controller according to a signal output by the first VGA interface.

Furthermore, the video switching unit further comprises a first switch circuit electrically connected with the power circuit, the first analog switch chip and the KVM controller respectively; the first switch circuit drives the first analog switch chip to conduct one of the first VGA interface and the second VGA interface according to the switching signal.

Furthermore, the first switch circuit comprises a second triode, a collector of the second triode is respectively connected with the power circuit and the first analog switch chip, an emitter of the second triode is grounded, and a base of the second triode is connected with the KVM controller.

Furthermore, the detection circuit comprises a third triode, a collector of the third triode is respectively connected with the power circuit and the KVM controller, an emitter of the second triode is grounded, and a base of the second triode is connected with the first VGA interface.

Furthermore, the number of the first VGA interface and the number of the first USB interfaces are both two.

Furthermore, the number of the second USB interfaces is two, and the second USB interfaces are respectively used for connecting a mouse and a keyboard; the number of the third USB interfaces is two.

The beneficial effects of the utility model reside in that: compared with the prior art, the utility model discloses a second USB interface is used for connecting mouse, a second USB interface is used for connecting the keyboard, the keyboard hotkey switch function of cooperation KVM controller, all can feed back key signal for the KVM controller when the user is through the combination of pressing certain button on the keyboard several seconds or a plurality of buttons, the KVM controller then gives according to this key signal and looks the screen switching list, USB signal switch unit output switching signal, at this moment, look the screen switch unit according to switching signal with second VGA interface and a first VGA interface connection, USB signal switch unit is according to switching signal with a first USB interface respectively with the USB concentrator, the KVM controller is connected, with this, through a plurality of first VGA interfaces, a plurality of first USB interface connection different computers, can realize that the equipment that supplies a set of second VGA interface, second USB interface and third USB interface to use a plurality of computers. And the USB concentrator is respectively and electrically connected with the USB signal switching unit and the KVM controller, so that a plurality of third USB interfaces can be expanded, a user can conveniently use the external printer, the card reader, the hard disk, the USB flash disk and other equipment, the performance of a computer is improved, and the practicability of the KVM switching device is improved.

[ description of the drawings ]

Fig. 1 is a schematic circuit diagram of the present invention;

fig. 2 is a circuit diagram of a first switching circuit of the present invention;

fig. 3 is a circuit diagram of the detection circuit of the present invention.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

Referring to fig. 1, a KVM switch supporting a hot key function according to an embodiment of the present invention is shown.

The KVM switch device supporting the hot key function comprises: the KVM controller 5, the video switching unit 2, the USB signal switching unit 11, the USB hub 9, the second VGA interface 3, the plurality of first VGA interfaces 1, the plurality of first USB interfaces 14, the plurality of second USB interfaces 15 and the plurality of third USB interfaces 10. The video screen switching unit 2, the USB signal switching unit 11 and the USB hub 9 are all connected with the KVM controller 5, the second VGA interface 3 and the plurality of first VGA interfaces 1 are all connected with the video screen switching unit 2, the plurality of first USB interfaces 14 and the plurality of second USB interfaces 15 are all connected with the USB signal switching unit 11, and the plurality of third USB interfaces 10 and the USB hub 9. The plurality of first VGA interfaces 1 are used for connecting different computers, the plurality of first USB interfaces 14 are used for connecting different computers, the second VGA interface 3 is used for connecting a display, the second USB interface 15 and the third USB interface 10 are respectively used for connecting one of a mouse, a keyboard, a printer, a USB disk and the like, the KVM controller 5 supports keyboard hot key switching, and the USB hub 9 is used for expanding a group of USB signals input by the KVM controller 5 into a plurality of groups of USB signals and supplying the USB signals to the third USB interface 10.

The utility model discloses a second USB interface 15 is used for connecting mouse, a second USB interface 15 is used for connecting the keyboard, the keyboard hotkey switch function of cooperation KVM controller 5, when the user presets the combination of the button on the keyboard for several seconds or a plurality of buttons through pressing KVM controller 5, then can trigger KVM controller 5 and give video switch unit 2, USB signal switch unit 11 output switching signal, at this moment, video switch unit 2 is connected second VGA interface 3 and a first VGA interface 1 according to switching signal, USB signal switch unit 11 is with a first USB interface 14 respectively with USB concentrator 9 according to switching signal, KVM controller 5 is connected, with this, through a plurality of first VGA interfaces 1, a plurality of first USB interfaces 14 connect different computers, can realize that the equipment that one set of second VGA interface 3, second USB interface 15 and third USB interface 10 are connected supplies a plurality of computers to use promptly. And the USB hub 9 is electrically connected to the USB signal switching unit 11 and the KVM controller 5, respectively, so as to expand a plurality of third USB interfaces 10, which is convenient for a user to use by external devices such as a printer, a card reader, a hard disk, and a USB disk, so as to improve the performance of the computer and improve the practicability of the KVM switching device.

In this embodiment, the display is a display screen, a projector, a television, and the like, the KVM switch device further includes a power circuit 8 connected to the first USB interface 14, the power circuit 8 obtains power from the computer through the first USB interface 14, and rectifies and filters the power input from the first USB interface 14 and outputs the power to the second VGA interface 3, the second USB interface 15, the third USB interface 10, the video switch unit, the USB hub 9, and the USB signal switch unit 11, respectively. In other embodiments, the video switch unit further includes a power interface for connecting a power source, and the power interface transmits the power source to the power circuit 8 to supply power to the KVM switch device.

In one embodiment, the video switch unit includes a first analog switch chip 13 respectively connected to the first VGA interface 1, the second VGA interface 3, the power circuit 8 and the KVM controller 5, and the first analog switch chip 13 connects a first VGA interface 1 to the second VGA interface 3 according to the switch signal output by the KVM controller 5. Wherein, the switching signal is high level or low level, and first analog switch chip 13 connects different first VGA interface 1 respectively through the passageway of inside difference to this, first analog switch chip 13 switches the passageway that corresponds according to the high level or the low level of KVM controller 5 output, is connected with second VGA interface 3 with the first VGA interface 1 that realizes switching the difference, realizes promptly that the utility model discloses the display is applicable to and switches two different computers and uses.

In one embodiment, the video switch unit further includes a first switch circuit 12 electrically connected to the power circuit 8, the first analog switch chip 13 and the KVM controller 5, respectively. The first switch circuit 12 drives the first analog switch chip 13 to conduct a first VGA interface 1 and a second VGA interface 3 according to the switching signal. Specifically, referring to fig. 2, the first switch circuit 12 includes a second transistor Q2, a collector of the second transistor Q2 is connected to the power circuit 8 and the first analog switch chip 13, an emitter of the second transistor Q2 is grounded, and a base of the second transistor Q2 is connected to the KVM controller 5. The power supply circuit 8 supplies power to the enable pin of the first analog switch chip 13, so that the enable pin of the first analog switch chip 13 is at a high level, when the KVM controller 5 outputs a level to the second triode Q2 to control the conduction of the second triode Q2, the level of the enable pin of the first analog switch chip 13 is pulled down, that is, the level of the enable pin of the first analog switch chip 13 becomes a low level, and the switching of the internal channel is realized based on the level.

In one embodiment, the USB signal switching unit 11 includes a second analog switch chip (not shown) respectively connected to the power circuit 8, the KVM controller 5 and the first USB interface 14. The second analog switch chip is connected to different first USB interfaces 14 through different internal channels, so that the second analog switch chip switches corresponding channels according to the high level or the low level output by the KVM controller 5, so as to access different first USB interfaces 14 for use, that is, the devices connected to the second USB interface 15 and the third USB interface 10 are switched to different computers for use.

In one embodiment, the KVM switch further includes a detection circuit 4 respectively connected to the KVM controller 5 and a first VGA interface 1, and the detection circuit 4 feeds back the first signal to the KVM controller 5 according to the signal output by the first VGA interface 1. Specifically, referring to fig. 3, the detection circuit 4 includes a third transistor Q3, a collector of the third transistor Q3 is connected to the power circuit 8 and the KVM controller 5, an emitter of the second transistor Q2 is grounded, and a base of the second transistor Q2 is connected to the first VGA interface 1. When the first VGA interface 1 corresponding to the detecting circuit 4 has a signal input, the second transistor Q2 is turned on to pull down the power level of the pin connected to the KVM controller 5, and the KVM controller 5 determines which computer is currently used according to the power level of the pin.

In the above embodiment, the first analog switch chip 13 and the second analog switch chip are both single-pole double-throw low-resistance analog switch chips, and the KVM controller 5 is a two-port USB KVM controller chip.

The KVM switching device comprises a first indicator light 6 and a second indicator light 7 which are respectively electrically connected with the KVM controller 5 and the power circuit 8, and the detection circuit 4 is matched with the KVM switching device, so that the first indicator light 6 and the second indicator light 7 can respectively indicate which computer is currently used, and the KVM switching device is convenient for a user to distinguish.

Specifically, the number of the first VGA interfaces 1 is two, and the first VGA interface a1a and the first VGA interface b1b are respectively; the number of the first USB interfaces 14 is two, namely a first USB interface a14a and a first USB interface b14b; the detection circuits 4 are two, namely a detection circuit a4a and a detection circuit b4b. The first VGA interface a1a and the first USB interface a14a are connected to the same computer a, the first VGA interface b1b and the first USB interface b14b are connected to the same computer b, the detection circuit a4a is electrically connected to the first VGA interface a1a and the KVM controller 5, and the detection circuit b4b is electrically connected to the first VGA interface b1b and the KVM controller 5. When the first VGA interface a1a has a signal input, the third transistor Q3 in the detection circuit a4a is turned on and pulls down the level fed back to the KVM controller 5, and the KVM controller 5 drives the first indicator 6 to light according to the level, so as to indicate that the computer a is connected. When the first VGA interface b1b has a signal input, the third transistor Q3 in the detection circuit b4b is turned on and pulls down the level fed back to the KVM controller 5, and the KVM controller 5 drives the second indicator light 7 to light according to the level to indicate that the computer b is connected.

The above description is only for the embodiments of the present invention, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A KVM switch supporting hot key functionality, comprising: the video switching device comprises a plurality of first VGA interfaces used for connecting a computer, a plurality of second VGA interfaces used for connecting a display, a video switching unit respectively connected with the second VGA interfaces and the first VGA interfaces, a plurality of first USB interfaces used for connecting the computer, a USB signal switching unit connected with the first USB interfaces, a KVM controller respectively connected with the USB signal switching unit and the video switching unit, a USB concentrator respectively connected with the video switching unit and the KVM controller, a plurality of second USB interfaces connected with the KVM controller and a plurality of third USB interfaces connected with the USB concentrator;

2. The KVM switch supporting hotkey function as claimed in claim 1, further comprising a power circuit connected to the first USB interface, wherein the power circuit gets power from the computer through the first USB interface, and rectifies and filters the power inputted from the first USB interface and outputs the rectified and filtered power to the second VGA interface, the second USB interface, the third USB interface, the video switching unit, the USB hub and the USB signal switching unit, respectively.

3. The KVM switch apparatus for supporting hot key function according to claim 2, wherein the video switch unit comprises a first analog switch chip connected to the first VGA interface, the second VGA interface, the power circuit and the KVM controller respectively, wherein the first analog switch chip connects a first VGA interface to a second VGA interface according to the switching signal outputted from the KVM controller.

4. The KVM switch supporting hot key function according to claim 3, wherein the USB signal switching unit comprises a second analog switch chip connected to the power circuit, the KVM controller and the first USB interface respectively.

5. The KVM switch for supporting hotkey function as claimed in claim 4, further comprising a detection circuit connected to the KVM controller and a first VGA interface respectively, wherein the detection circuit feeds back the first signal to the KVM controller according to the signal outputted by the first VGA interface.

6. The KVM switch supporting hot key function according to claim 5, wherein said video switch unit further comprises a first switch circuit electrically connected to the power circuit, the first analog switch chip and the KVM controller, respectively; the first switch circuit drives the first analog switch chip to conduct one of the first VGA interface and the second VGA interface according to the switching signal.

7. The KVM switch for supporting hotkey function according to claim 6, wherein said first switch circuit comprises a second transistor, wherein a collector of said second transistor is connected to the power circuit and the first analog switch chip, respectively, an emitter of said second transistor is connected to ground, and a base of said second transistor is connected to the KVM controller.

8. The KVM switch for supporting hot key function according to claim 7, wherein said detecting circuit comprises a third transistor, wherein a collector of said third transistor is connected to said power circuit and said KVM controller, respectively, an emitter of said second transistor is connected to ground, and a base of said second transistor is connected to said first VGA interface.

9. The KVM switch supporting hot key function according to claim 8, wherein the number of the first VGA interface and the first USB interface is two.

10. The KVM switch supporting hot key function according to claim 9, wherein said second USB interface is two in number and is used for connecting mouse and keyboard, respectively; the number of the third USB interfaces is two.