CN203563163U - Set top box with switch capable of popping up automatically when power failure happens - Google Patents
Set top box with switch capable of popping up automatically when power failure happens Download PDFInfo
- Publication number
- CN203563163U CN203563163U CN201320776597.XU CN201320776597U CN203563163U CN 203563163 U CN203563163 U CN 203563163U CN 201320776597 U CN201320776597 U CN 201320776597U CN 203563163 U CN203563163 U CN 203563163U
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- China
- Prior art keywords
- top box
- set top
- power
- electromagnetic relay
- automatically
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- Expired - Fee Related
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Abstract
The utility model discloses a set top box with a switch capable of popping up automatically when power failure happens. The set top box includes a switch module and an electromagnetic relay module. The switch module is connected with an electromagnetic relay control end and controls on-off of a power supply of the electromagnetic relay control end. The set top box is also provided with a power conversion circuit, an input end of which is connected with an external power supply. En electromagnetic relay contact end is connected with the external power supply and a set top box power-supply circuit. When power failure happens suddenly, a power supply of the set top box can be cut off automatically and when the power is recovered, automatic work of the set top box can be prevented so that damages on electrical appliances are reduced.
Description
Technical field
The utility model relates to cable digital TV set-top box field, especially relates to the Set Top Box that a kind of power-off can automatic spring switch.
Background technology
Even if science and technology is in develop rapidly now, the situation of the unexpected power-off in place of living still can happen occasionally, after power recovery after power-off, the Set Top Box of prior art all can be resumed work automatically, power recovery in a flash, voltage unstable, may cause the electrical equipment of energising suddenly to burn, heavy cause fire.Based on this present situation, how effectively to protect the power interruption recovering electric power safety of Set Top Box later, be this improvement purpose.
Utility model content
The purpose of this utility model be just to provide a kind of can automatic spring after power-off switch realize the Set Top Box of power-off.
The technical solution of the utility model is: the Set Top Box that a kind of power-off can automatic spring switch, comprise switch module and electromagnetic relay module, described switch module is connected the break-make of controlling electromagnetic relay control end power supply with electromagnetic relay control end, described in described electromagnetic relay tip side connection external power source and Set Top Box power circuit, switch module comprises power-switching circuit, and its input connects external power source.
The utility model compared with prior art has following significant beneficial effect: when power-off suddenly, can automatically shut down Set Top Box power supply, during power recovery, can prevent Set Top Box automatic operation, can reduce electrical equipment and damage.
Accompanying drawing explanation
Accompanying drawing 1 forms schematic diagram for the utility model embodiment.
Embodiment
In order to allow those skilled in the art better understand the technical solution of the utility model, below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, power-off shown in this embodiment can automatic spring switch Set Top Box, comprise electromagnetic relay module and Set Top Box switch module, described electromagnetic relay module comprises control circuit, electromagnet, armature, spring, contact, and wherein control circuit connects low-tension supply, and is connected with electromagnet coil, spring connects armature and electromagnet, drawing armature, during no power, moving contact and fixed contact are off-state; Described Set Top Box switch module, one end is connected with armature, and the other end is connected with operating circuit, and wherein operating circuit connects high voltage source.After external power source access, through power-switching circuit, convert the power supply that is applicable to relay work to, be connected to the coil control end of relay, in connection line, be connected in series switch.
When switch contact and lower contact join, operating circuit is connected, otherwise disconnects.Manually press Set Top Box switch, force electromagnetic relay armature to be connected with iron core, Set Top Box power turn-on, in electromagnetic relay coil, there is electric current to flow through, produce galvanomagnetic effect, armature will overcome the pulling force of return spring under the effect of electromagnetic attracting force to be inhaled to iron core, thereby further with moving contact and fixed contact (normally-closed contact) adhesive of moving armature.
After unexpected power-off, current vanishes in circuit, relay coil power-off, the suction of electromagnetism also disappears thereupon, armature will return to original position under the reaction force of spring, and moving contact and original fixed contact (normally-closed contact) are discharged, and the armature of electromagnetic relay returns to original position simultaneously under spring reaction power, Set Top Box switch is ejected, reach the technique effect of automatic spring switch.
The above; it is only embodiment of the present utility model; but the protection range of utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.
Claims (2)
1. the Set Top Box that a power-off can automatic spring switch, it is characterized in that: comprise switch module and electromagnetic relay module, described switch module is connected the break-make of controlling electromagnetic relay control end power supply with electromagnetic relay control end, described electromagnetic relay tip side connects external power source and Set Top Box power circuit.
2. the Set Top Box that power-off according to claim 1 can automatic spring switch, is characterized in that: described switch module comprises power-switching circuit, and its input connects external power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320776597.XU CN203563163U (en) | 2013-12-02 | 2013-12-02 | Set top box with switch capable of popping up automatically when power failure happens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320776597.XU CN203563163U (en) | 2013-12-02 | 2013-12-02 | Set top box with switch capable of popping up automatically when power failure happens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203563163U true CN203563163U (en) | 2014-04-23 |
Family
ID=50512853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320776597.XU Expired - Fee Related CN203563163U (en) | 2013-12-02 | 2013-12-02 | Set top box with switch capable of popping up automatically when power failure happens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203563163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712158A (en) * | 2016-11-24 | 2017-05-24 | 张双全 | Automatic power-on device installed on freezer |
-
2013
- 2013-12-02 CN CN201320776597.XU patent/CN203563163U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712158A (en) * | 2016-11-24 | 2017-05-24 | 张双全 | Automatic power-on device installed on freezer |
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Legal Events
| 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: 20140423 Termination date: 20141202 |
|
| EXPY | Termination of patent right or utility model |