CN2829660Y - Dental silver amalgam mixer safety door - Google Patents
Dental silver amalgam mixer safety door Download PDFInfo
- Publication number
- CN2829660Y CN2829660Y CN 200520014942 CN200520014942U CN2829660Y CN 2829660 Y CN2829660 Y CN 2829660Y CN 200520014942 CN200520014942 CN 200520014942 CN 200520014942 U CN200520014942 U CN 200520014942U CN 2829660 Y CN2829660 Y CN 2829660Y
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- CN
- China
- Prior art keywords
- safety door
- hall element
- control circuit
- tooth
- section
- 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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Abstract
The utility model discloses a safety door of a dental silver mercury mixer. The utility model comprises a safety door body and a control circuit, wherein magnetic steel with permanent magnetism is arranged on a fixing component of a mixer and a Hall element is arranged on the safety door. When the safety door is closed, the Hall element is right opposite to the magnetic steel with permanent magnetism. The control circuit comprises the Hall element, a differential amplifier, a trigger, a switch tube and a single chip computer which are orderly connected. The control signal output by the single chip computer controls the rotation and stop of a motor of the mixer. The control circuit which is composed of the Hall element has very high sensitivity on a magnetic field, and the control circuit is a contactless switch circuit which has high reliability and high sensitivity. When the safety door is opened, the Hall element and the magnetic steel with permanent magnetism are staggered, the switch tube outputs high electric level and the single chip computer controls the stop of the motor. The motor is allowed to be started until a foot detects low electric level.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically a kind of tooth section argental mercury dispenser safety door.
Background technology
Tooth section argental mercury dispenser is a kind of tooth section medical apparatus and instruments commonly used, and its effect is to carry out " ∞ " font high speed vibration by the vibrations head in housing, and filling tooth material is fully concocted.In the vibrations process, if safety door is opened, the possible device argental mercury material in the apparatus may damage the operator after being contacted by human body.
Summary of the invention
To be solved in the utility model is existing tooth section argental mercury dispenser safety door does not stop the measure to shake when accident is opened defective, a kind of follow-on tooth section argental mercury dispenser safety door is provided, stop machine run when being intended to make safety door to open immediately, and do not have to close under the state that puts in place at safety door, motor can not start.
The technical scheme that addresses the above problem employing is: a kind of tooth section argental mercury dispenser safety door, comprise safety door body and control circuit, described dispenser fixed part is provided with permanent magnetic steel, on described safety door, be provided with Hall element, and described Hall element is just in time relative with described permanent magnetic steel when safety door is fastened; Described control circuit comprises Hall element, difference amplifier, trigger, switching tube and the single-chip microcomputer that connects successively, and described single-chip microcomputer output control signal is controlled the rotation of dispenser motor and stopped.
The position that tooth of the present utility model section argental mercury dispenser safety door selects for use Hall element to detect safety door reaches the control purpose.By the control circuit that Hall element constitutes, high to the sensitivity in magnetic field, be a kind of high reliability, highly sensitive non-contact switch circuit.Hall element can produce Hall voltage under the action of a magnetic field poor, and this signal is delivered to the trigger shaping after difference amplifier amplifies, and trigger upset output high level makes the switching tube conducting, output low level when magnetic field reaches certain value.Single-chip microcomputer judges that this foot is a low level, just continues original program.When safety door opened, Hall element and permanent magnetic steel were staggered, and the magnetic flux on the Hall element disappears, switching tube output high level, and at this moment, single-chip microcomputer detects high level with regard to disable motor at this foot, just allows electric motor starting after detecting low level at this foot.Thereby this utility model can guarantee to stop machine run immediately in the moment that safety is opened, and does not have to close under the state that puts in place at safety door, and motor keeps stall.
Permanent magnetic steel of the present utility model can be fixed on any one position relative with described safety door on the dispenser, as with the involutory edge of described safety door on, perhaps directly be embedded in the rotating shaft of safety door, because dispenser is relatively-stationary, when safety door was opened, the Hall element that is arranged on the safety door will stagger with permanent magnetic steel, produced a sensing variable, and export to control circuit, and then reach the purpose of control motor.
As further improvement of the utility model, described trigger can be monostable flipflop or Schmidt trigger, the preferred latter.Described switching tube can be audion, metal-oxide-semiconductor or field effect transistor, and preferred audion can make circuit more simple like this, and can reduce product cost.
Further improve as of the present utility model, described control circuit is connected to power supply by voltage regulator.Described control circuit is an integrated circuit.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a frame for movement sketch map of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
The specific embodiment
With reference to Fig. 1, tooth of the present utility model section argental mercury dispenser safety door, comprise safety door body 1 and control circuit 2, on the doorframe inboard of described safety door, be provided with Hall element 5, on the dispenser housing, be provided with permanent magnetic steel 4, and described Hall element 5 is just in time relative with described permanent magnetic steel 4 when safety door is fastened with the involutory edge of described safety door.
With reference to Fig. 2, described control circuit 2 comprises Hall element, difference amplifier, Schmidt trigger, audion T and the single-chip microcomputer that connects successively, is connected to power supply by voltage regulator.Described single-chip microcomputer output control signal is controlled the rotation of dispenser motor and is stopped.
When safety door 1 closure, Hall element 5 and described permanent magnetic steel 4 over against, under the action of a magnetic field, can produce the signal of telecommunication and after difference amplifier amplifies, deliver to the Schmidt trigger shaping and export high level, make audion T conducting, output low level, the Single-chip Controlling motor runs well.When safety door opens, Hall element 5 is staggered with permanent magnetic steel 4, magnetic flux on the Hall element 5 disappears, Schmidt trigger upset output low level, audion T ends, colelctor electrode output high level, the stall of Single-chip Controlling motor, this state remains to always and just allows electric motor starting after single-chip microcomputer detects low level.
What should be understood that is: the foregoing description is just to explanation of the present utility model, rather than to restriction of the present utility model, any innovation and creation that do not exceed in this utility model connotation scope all fall within the protection domain of the present utility model.
Claims (7)
1, a kind of tooth section argental mercury dispenser safety door, comprise safety door body (1) and control circuit, it is characterized in that on described dispenser fixed part, being provided with permanent magnetic steel (4), on described safety door, be provided with Hall element (5), and described Hall element (5) is fastened at safety door good relative with described permanent magnetic steel (4) at present; Described control circuit comprises Hall element, difference amplifier, trigger, switching tube and the single-chip microcomputer that connects successively, and described single-chip microcomputer output control signal is controlled the rotation of dispenser motor and stopped.
2, tooth as claimed in claim 1 section argental mercury dispenser safety door is characterized in that described permanent magnetic steel (4) is embedded in the top edge of described dispenser housing.
3, tooth as claimed in claim 2 section argental mercury dispenser safety door is characterized in that described Hall element (5) is arranged on the doorframe inboard of described safety door.
4, tooth as claimed in claim 1 section argental mercury dispenser safety door is characterized in that described trigger is a Schmidt trigger.
5, tooth as claimed in claim 1 section argental mercury dispenser safety door is characterized in that described switching tube is an audion.
6, as any one described tooth section argental mercury dispenser safety door of claim 1-5, it is characterized in that described control circuit is connected to power supply by voltage regulator.
7, tooth as claimed in claim 6 section argental mercury dispenser safety door is characterized in that described control circuit is an integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014942 CN2829660Y (en) | 2005-09-15 | 2005-09-15 | Dental silver amalgam mixer safety door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014942 CN2829660Y (en) | 2005-09-15 | 2005-09-15 | Dental silver amalgam mixer safety door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2829660Y true CN2829660Y (en) | 2006-10-25 |
Family
ID=37134583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520014942 Expired - Fee Related CN2829660Y (en) | 2005-09-15 | 2005-09-15 | Dental silver amalgam mixer safety door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2829660Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127965A (en) * | 2013-03-19 | 2013-06-05 | 上海博迅实业有限公司 | Control system of pollution-free biosafety cabinet |
| CN103127966A (en) * | 2013-03-19 | 2013-06-05 | 上海博迅实业有限公司 | Control system utilizing photocatalyst to sterilize biosafety cabinet |
-
2005
- 2005-09-15 CN CN 200520014942 patent/CN2829660Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127965A (en) * | 2013-03-19 | 2013-06-05 | 上海博迅实业有限公司 | Control system of pollution-free biosafety cabinet |
| CN103127966A (en) * | 2013-03-19 | 2013-06-05 | 上海博迅实业有限公司 | Control system utilizing photocatalyst to sterilize biosafety cabinet |
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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: 20061025 Termination date: 20140915 |
|
| EXPY | Termination of patent right or utility model |