CN204087119U - The shatter-proof keyboard of waterproof of high availability - Google Patents
The shatter-proof keyboard of waterproof of high availability Download PDFInfo
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- CN204087119U CN204087119U CN201420488843.6U CN201420488843U CN204087119U CN 204087119 U CN204087119 U CN 204087119U CN 201420488843 U CN201420488843 U CN 201420488843U CN 204087119 U CN204087119 U CN 204087119U
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- keyboard
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- master chip
- pcb board
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Abstract
The utility model discloses a kind of shatter-proof keyboard of waterproof of high availability, belong to a kind of computer entry device, comprise rubber keyboard and pcb board, described pcb board sealing is arranged on the inside of rubber keyboard, described pcb board is provided with multiple conductive bumps corresponding with button on rubber keyboard, described pcb board is provided with master chip and reset chip, described master chip and reset chip access matrix circuit respectively, described matrix circuit also distinguishes incoming communication interface and debugging interface, and described master chip and reset chip also access power module.By reset chip master chip cannot normally run or matrix circuit automatic conducting time reset in time, avoid the keyboard that causes in severe operating environments without response case, namely overcome from circuit and technological design face, ensure the normal operation of highly difficult operator's console, as nuclear power plant, waterborne and run monomer in the air, effectively reduce keyboard and use requirement to objective environment, be comparatively suitable for using on the notebook computer of embedded environment.
Description
Technical field
The utility model relates to a kind of computer entry device, and in particular, the utility model relates generally to a kind of shatter-proof keyboard of waterproof of high availability.
Background technology
At present, waterproff keyboard on the market adopts singlechip controller, and operating voltage is generally 4.0V to 5.5V, under host voltage exports unstable situation, and keyboard None-identified when may cause startup.Thus be necessary to do further improvement for the circuit structure of existing waterproff keyboard.
Utility model content
One of the purpose of this utility model is for above-mentioned deficiency, there is provided a kind of waterproof of high availability shatter-proof keyboard, to connect or under the bad environment of the larger temperature difference, the keyboard that causes is without response to expect to solve multiple device, cause device power-up failure, and cannot the technical matters of manually pluggable mode restarting equipment.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
The shatter-proof keyboard of waterproof of a kind of high availability provided by the utility model, comprise rubber keyboard and pcb board, described pcb board sealing is arranged on the inside of rubber keyboard, described pcb board is provided with multiple conductive bumps corresponding with button on rubber keyboard, described pcb board is provided with master chip and reset chip, described master chip and reset chip access matrix circuit respectively, described matrix circuit also distinguishes incoming communication interface and debugging interface, described master chip and reset chip also access power module, after being powered on by master chip, first BIT self-inspection is carried out to matrix circuit, after the not automatic conducting of self-inspection judgment matrix circuit, by master chip, communication interface is enumerated, thus set up the communication link with main frame, then working stage is entered.
As preferably, further technical scheme is: described communication interface is USB interface.
Further technical scheme is: described reset chip also accesses master chip, for checking the current state of master chip within the unit interval, resets to it.
Further technical scheme is: described rubber keyboard is divided into two parts, and two parts are screwed and are integrated, and are also provided with the rubber for sealing between described two parts rubber keyboard.
Further technical scheme is: described two parts rubber keyboard is provided with the screw matched with screw, and the inside of rubber keyboard is provided with the fixed hole position matched with pcb board.
Further technical scheme is: be also provided with filtering circuit between described master chip and power module.
Further technical scheme is: the inwall of described rubber keyboard is also provided with screen layer.
Compared with prior art, one of the beneficial effects of the utility model are: by reset chip master chip cannot normally run or matrix circuit automatic conducting time reset in time, avoid the keyboard that causes in severe operating environments without response case, namely overcome from circuit and technological design face, ensure the normal operation of highly difficult operator's console, as nuclear power plant, waterborne and run monomer in the air, effectively reduce the requirement of keyboard use to objective environment, comparatively be suitable for using on the notebook computer of embedded environment, the shatter-proof keyboard structure of waterproof of a kind of high availability provided by the utility model is simple simultaneously, can be used as the keyboard of all kinds of notebook computer, range of application is wide.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram for illustration of the utility model embodiment;
Fig. 2 is the keyboard operational flow diagram for illustration of another embodiment of the utility model;
Fig. 3 is for illustration of another embodiment keyboard working state figure of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
Shown in figure 1, an embodiment of the present utility model is a kind of shatter-proof keyboard of waterproof of high availability, comprise rubber keyboard and pcb board, described pcb board sealing is arranged on the inside of rubber keyboard, described pcb board is provided with multiple conductive bumps corresponding with button on rubber keyboard, described pcb board is provided with master chip and reset chip, described master chip and reset chip access matrix circuit respectively, described matrix circuit also distinguishes incoming communication interface and debugging interface, described master chip and reset chip also access power module, after being powered on by master chip, first BIT self-inspection is carried out to matrix circuit, after the not automatic conducting of self-inspection judgment matrix circuit, by master chip, communication interface is enumerated, thus set up the communication link with main frame, then working stage is entered.Inventor considers the custom interface of active computer keyboard, adopts USB interface as above-mentioned communication interface.
In the present embodiment, by reset chip master chip cannot normally run or matrix circuit automatic conducting time reset in time, avoid the keyboard that causes in severe operating environments without response case, namely overcome from circuit and technological design face, ensure the normal operation of highly difficult operator's console, as nuclear power plant, waterborne and run monomer in the air, effectively reduce the requirement of keyboard use to objective environment, be comparatively suitable for using on the notebook computer of embedded environment.
In another embodiment of the present utility model, above-mentioned reset chip also accesses master chip, for checking the current state of master chip within the unit interval, resets to it, and shown in figure 2, concrete workflow is as follows:
1) power up phase:
Master chip and copy chip carry out self-inspection and reset to chip itself;
2) the BIT self-inspection stage:
From checking: carry out self-inspection to keyboard matrix circuit, guarantee the situation not having automatic conducting.If there is the situation of automatic conducting, system lights all LED and automatic retry, until just can extinguish all LED from the situation of conducting, then enters next step.All LED can not be lighted under normal circumstances.
Master chip status checking: after reset chip powers on, and Master Keyboard is by after checking, reset chip regular inspection looks into the duty of master chip, if continuous working is at non-camp key-press status (equipment working state is shown in Fig. 3) in the N continuous time cycle, reset chip will reset to master chip.(being so no matter that chip is died or USB communication breaks down and can realize automatically reseting to equipment).
3) USB enumeration stage: the communication link setting up main frame and equipment.
4) automatically reset: the current condition of automatically reseting is, master chip is not responded within 0.5 second, and reset coil sector-meeting starts the program that automatically resets, and re-powers keyboard.Automatically reset and by customization, can arrange when keyboard dispatches from the factory, also can by the on-the-spot burning of technician.
5) working stage:
When master chip has detected that keyboard is pressed, carry out Key dithering and gone to disturb processing; Then whether judged result is still down state, if key corresponding to systems inspection matrix circuit trigger coordinate generate usb data bag and then send USB report; If button is not down state after Key dithering, then block this event.When equipment receives Host Command, response Host Command.As: Num Lck, CapsLock state etc. is set.
6) dynamic push definition
According to user's needs, F13 ~ F24 key assignments can be customized.This operation can be specified before keyboard dispatches from the factory, also can by user technician's field upgrade.
In the utility model the above embodiments, for improving the reliability and stability of equipment, this device interior is integrated with BIT system.Be that equipment is stable, reliability service provides support at device start and operational process.Can effectively solve following problem:
1) by hardware damage or aging cause short circuit, from conducting.
2) the USB communication disorder caused by extreme electromagnetic environment, master chip disabler or deadlock;
3) analytical equipment abnormal conditions, quick solution problem;
Fault detect adopts BIT detection method.BIT is used for the self-inspection of system and module, and this program mainly carries out full test to the CPU duty, communication interface, intermodule communication link, keyboard matrix circuit etc. of processor.BIT has higher fault coverage, by BIT, positions fault, then by switching, realizes System reorganization, recovery system function, reporting fault phenomenon.In working order, carry out cycle self-inspection, localization of fault is made tentative recovery action to module level;
In another embodiment of the present utility model, inventor also improves the structure of keyboard, is specially and rubber keyboard is set to two parts, and two parts are screwed and are integrated, and are also provided with the rubber for sealing between described two parts rubber keyboard.
Two parts rubber keyboard is provided with the screw matched with screw, and the inside of rubber keyboard is provided with the fixed hole position matched with pcb board.
And be the common mode radiation of the differential mode radiation and system cable of avoiding printed wiring board (PCB), shielding can be adopted to solve with the mode of filtering, be specially and set up filtering circuit between master chip and power module, the inwall of rubber keyboard is also provided with screen layer.Specifically can adopt following measure:
Specifically take following measures:
A) multilayer board stepped construction, the wiring of concern clock line and PCB EMC Design with Rule can reduce the differential mode radiation of printed board effectively;
B) power import place adds power-supply filter, while suppression power supply noise, note computing machine high-frequency signal through power lead coupling, conduct outside radiation.
Further, to the requirement of button and possible concurrent characteristic when taking into full account that user uses during above-mentioned core control circuit design, Redundancy Design is carried out to keyboard matrix circuit, the more concurrent button of keyboard support is triggered.
Power supply part, adopts wide input voltage design, and keyboard can be better operated in the environment of power supply supply more complicated.
The selection of components and parts, adopts the industrial level of satisfied temperature requirement, the device of military products grade.To the device of satisfied temperature requirement carrying out Select to use.
Humid test screening is carried out to module, meets low temperature requirements.
In addition, airborne vibration, shock environment, on the impact of equipment, mainly contain two aspects: one is that instantaneous of short duration impact produces instantaneous open circuit when causing modular connector and backplane interconnect.Constantly long-term vibration causes printed board, component's feet and solder joint fatigue to destroy.This equipment intends vibration resistance, impact capacity from pcb board thickeies, material angle improves equipment.
In addition, Supportability design of the present utility model mainly considers support equipment, technical information and computer resource guarantee.
Support equipment: adopt general-purpose chip, device and Open architecture complete develop equip maintenance, reduce the dependence to specialized equipment;
Adopt mature technology when the design of product, complete technical information and necessary use training be provided, guarantee that scene can reasonable employment and maintenance, ensure the continuity of equipment use technically, be convenient to safeguard, expansion and upgrading, extend the life cycle of equipment.
Resource guarantee: the supply carrying out standby redundancy, requires long-term stock to general-purpose device and purchases in advance, select ripe production domesticization components and parts, improve overall support capability, the technical service troop kept relative stability, carries out technical guarantee work as far as possible.
Above-mentioned safeguard and means are that shatter-proof 114 keyboards of ZY high availability military discipline waterproof provide good guarantee, can meet the demands.
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also drop in scope of the present utility model to realize this feature, structure or feature in conjunction with other embodiments.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (7)
1. the shatter-proof keyboard of the waterproof of a high availability, comprise rubber keyboard and pcb board, described pcb board sealing is arranged on the inside of rubber keyboard, described pcb board is provided with multiple conductive bumps corresponding with button on rubber keyboard, it is characterized in that: described pcb board is provided with master chip and reset chip, described master chip and reset chip access matrix circuit respectively, described matrix circuit also distinguishes incoming communication interface and debugging interface, described master chip and reset chip also access power module, after being powered on by master chip, first BIT self-inspection is carried out to matrix circuit, after the not automatic conducting of self-inspection judgment matrix circuit, by master chip, communication interface is enumerated, thus set up the communication link with main frame, then working stage is entered.
2. the shatter-proof keyboard of the waterproof of high availability according to claim 1, is characterized in that: described communication interface is USB interface.
3. the shatter-proof keyboard of the waterproof of high availability according to claim 1 and 2, is characterized in that: described reset chip also accesses master chip, for checking the current state of master chip within the unit interval, resetting to it.
4. the shatter-proof keyboard of the waterproof of high availability according to claim 3, is characterized in that: described rubber keyboard is divided into two parts, and two parts are screwed and are integrated, and are also provided with the rubber for sealing between described two parts rubber keyboard.
5. the shatter-proof keyboard of the waterproof of high availability according to claim 4, is characterized in that: described two parts rubber keyboard is provided with the screw matched with screw, and the inside of rubber keyboard is provided with the fixed hole position matched with pcb board.
6. the shatter-proof keyboard of the waterproof of high availability according to claim 4, is characterized in that: be also provided with filtering circuit between described master chip and power module.
7. the shatter-proof keyboard of waterproof of the high availability according to claim 4 or 6, is characterized in that: the inwall of described rubber keyboard is also provided with screen layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488843.6U CN204087119U (en) | 2014-08-28 | 2014-08-28 | The shatter-proof keyboard of waterproof of high availability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488843.6U CN204087119U (en) | 2014-08-28 | 2014-08-28 | The shatter-proof keyboard of waterproof of high availability |
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| Publication Number | Publication Date |
|---|---|
| CN204087119U true CN204087119U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420488843.6U Expired - Fee Related CN204087119U (en) | 2014-08-28 | 2014-08-28 | The shatter-proof keyboard of waterproof of high availability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109255265A (en) * | 2018-08-01 | 2019-01-22 | 武汉普利商用机器有限公司 | Self-recovery method and device when reading identity card information exception |
-
2014
- 2014-08-28 CN CN201420488843.6U patent/CN204087119U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109255265A (en) * | 2018-08-01 | 2019-01-22 | 武汉普利商用机器有限公司 | Self-recovery method and device when reading identity card information exception |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20170828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |