CN2485692Y - Device for preventing hand computer from hot connection - Google Patents
Device for preventing hand computer from hot connection Download PDFInfo
- Publication number
- CN2485692Y CN2485692Y CN 01229578 CN01229578U CN2485692Y CN 2485692 Y CN2485692 Y CN 2485692Y CN 01229578 CN01229578 CN 01229578 CN 01229578 U CN01229578 U CN 01229578U CN 2485692 Y CN2485692 Y CN 2485692Y
- Authority
- CN
- China
- Prior art keywords
- plug
- palm
- card
- toggle switch
- add
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Coupling Device And Connection With Printed Circuit (AREA)
- Power Sources (AREA)
Abstract
The utility mode provides a device for preventing hand computer from hot connection, which is arranged in the socket of an external card of hand computer, comprising a slide switch and a plug limit device, wherein, the slide switch has two signal input terminals and a signal output terminal, and the plug limit device is connected with the slide switch; when the slide switch slides to the opening or closing place, the plug limit device is positioned at a place for limiting or permitting the plug of the external card. The utility model ensures that when plugging the external card, the power of the hand computer is close, effectively preventing the problem of crashing and circuit burning caused by the hot plug; meanwhile, the utility model decreases the complexity in designing the circuit, saving the producing cost of the hand computer.
Description
The utility model relates to a kind of device of avoiding the charged plug of palm PC, refers to especially a kind ofly can avoid the user when using palm PC, with the charged device that causes burning circuit from the palm PC plug of external connection of storage card.
Present palm PC (as Win CE product) mainly is the access situation by the circuit judges add-on card in the palm PC when solving charged hot-swappable problem, and whether decision provides power supply then.Generally speaking, the bus of add-on card and internal system bus separate by buffer circuit.Do not having under the state of add-on card, palm PC is not to the add-on card circuit supply.After add-on card was inserted, palm PC just began to power to add-on card after detecting; Simultaneously, interface circuit cushions bus, influences bus state when preventing removable card.This method makes whole buffer circuit complexity, and the control difficulty is very big, and the price of palm PC is very high.
Fundamental purpose of the present utility model is to provide a kind of device of avoiding the charged plug of palm PC, and this device reduces the complex circuit designs degree when preventing palm PC add-on card warm swap, save the manufacturing cost of palm PC.
The purpose of this utility model realizes by the following technical solutions:
A kind of device of avoiding the charged plug of palm PC, this device are located in the palm PC add-on card slot, and it comprises a toggle switch and a plug stop means; This toggle switch is provided with two signal input parts and a signal output part at least, this plug stop means is connected with toggle switch, and when this toggle switch was struck to the position that opens or closes, this plug stop means was positioned at restriction or allows the position of add-on card plug.
Two signal input parts of this toggle switch are connected with the power supply and the power supply ground of palm PC respectively, and its signal output part is connected with the off signal input end of palm PC.
This plug stop means is a pin, and this pin is provided with a protuberance that matches with the stopper slot of palm PC add-on card.
The utility model is by above-mentioned device, guaranteed when palm PC plug add-on card, the power supply of palm PC is in closed condition, thereby deadlock that causes because of charged plug and the problem of burning circuit have been prevented effectively, make the complexity of circuit design reduce the manufacturing cost of having saved palm PC simultaneously.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the synoptic diagram of the utility model one embodiment.
As shown in Figure 1, the utility model is provided with a toggle switch 12 and a plug stop means 11 in palm PC add-on card slot 1; This toggle switch 12 is provided with two signal input parts and a signal output part at least, this plug stop means 11 is connected with toggle switch 12, and when this toggle switch 12 was struck to the position that opens or closes, this plug stop means 11 was positioned at restriction or allows the position of add-on card plug.
Two signal input parts of this toggle switch are connected with the power supply VCC and the power supply ground of palm PC respectively, and the signal output part of toggle switch is connected with the off signal input end of palm PC.In embodiment of the present utility model, the signal output part of toggle switch is connected with the off signal input end of palm PC by a change-over circuit 13 back, this change-over circuit 13 can for a signal transformation circuit (for example: a reverser).
Plug stop means 11 is a pin, and this pin is provided with a protuberance that matches with the stopper slot 21 of palm PC add-on card 2.
When to palm PC plug add-on card 2, at first toggle switch 12 to be adjusted to the position of pass, otherwise the protuberance of the pin that is connected with toggle switch 12 is owing to be in the position of restriction add-on card plug, guaranteed that therefore add-on card is when the position that toggle switch 12 is in out and can't insert; To export the off signal of palm PC by the output terminal of toggle switch 12 when stirring this toggle switch 12, palm PC cuts out therefrom.After add-on card 2 insertions were extracted, with the position that toggle switch 12 is adjusted to out, the starting-up signal of the output terminal of toggle switch 12 output palm PC, palm PC could normally start started shooting.
Thus, the utility model has reduced the complexity of circuit design, has saved the manufacturing cost of palm PC, has improved reliability, by physical construction and cooperating of circuit having solved the problem that prevents warm swap palm PC add-on card.Make that palm PC is in off-mode when the plug add-on card.
Claims (3)
1, a kind of device of avoiding the charged plug of palm PC is characterized in that: this device is located in the palm PC add-on card slot, and it comprises a toggle switch and a plug stop means; This toggle switch is provided with two signal input parts and a signal output part at least, this plug stop means is connected with toggle switch, and when this toggle switch was struck to the position that opens or closes, this plug stop means was positioned at restriction or allows the position of add-on card plug.
2, the device of avoiding the charged plug of palm PC as claimed in claim 1, it is characterized in that: two signal input parts of this toggle switch are connected with the power supply and the power supply ground of palm PC respectively, and its signal output part is connected with the off signal input end that palm PC leaves.
3, the device of avoiding the charged plug of palm PC as claimed in claim 1 is characterized in that: this plug stop means is a pin, and this pin is provided with a protuberance that matches with the stopper slot of palm PC add-on card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01229578 CN2485692Y (en) | 2001-07-03 | 2001-07-03 | Device for preventing hand computer from hot connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01229578 CN2485692Y (en) | 2001-07-03 | 2001-07-03 | Device for preventing hand computer from hot connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2485692Y true CN2485692Y (en) | 2002-04-10 |
Family
ID=33644414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01229578 Expired - Fee Related CN2485692Y (en) | 2001-07-03 | 2001-07-03 | Device for preventing hand computer from hot connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2485692Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866385A (en) * | 2015-06-09 | 2015-08-26 | 广东欧珀移动通信有限公司 | Mobile terminal and method for hot plug of memory card thereof |
-
2001
- 2001-07-03 CN CN 01229578 patent/CN2485692Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866385A (en) * | 2015-06-09 | 2015-08-26 | 广东欧珀移动通信有限公司 | Mobile terminal and method for hot plug of memory card thereof |
| CN104866385B (en) * | 2015-06-09 | 2017-11-17 | 广东欧珀移动通信有限公司 | Mobile terminal and its storage card hot plug method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |