CN2428094Y - Electronic medical stethophone for teaching - Google Patents
Electronic medical stethophone for teaching Download PDFInfo
- Publication number
- CN2428094Y CN2428094Y CN 00213874 CN00213874U CN2428094Y CN 2428094 Y CN2428094 Y CN 2428094Y CN 00213874 CN00213874 CN 00213874 CN 00213874 U CN00213874 U CN 00213874U CN 2428094 Y CN2428094 Y CN 2428094Y
- Authority
- CN
- China
- Prior art keywords
- pick
- circuit
- mic
- operatic tunes
- teaching
- 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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- Media Introduction/Drainage Providing Device (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
The utility model discloses an electronic stethoscope for teaching use, which comprises ear pieces and a chestpiece, wherein, the chestpiece is provided with a cylindrical casing, the lower part has a metallic diaphragm, the upper part of the metallic diaphragm is a voice-aid cavity in which a sensor is positioned, one side of the sensor is provided with a single side metal conduit which is led out of the voice-aid cavity and connected with the ear pieces, the sound received from the inside of the sound-aid cavity by the sensor receives the power amplification of a sound-electricity translation circuit and an audio amplification circuit, and sensor drives a loudspeaker to produce sound. Through the loudspeaker on the chestpiece, teachers can enable a plurality of students to simultaneously auscultate an identical diseased part in auscultation teaching.
Description
This utility model relates to a kind of stethoscope that is exclusively used in clinical diagnosis teaching usefulness.
Current, cardiac auscultation is the emphasis and the difficult point of clinical medicine teaching, owing to be subjected to stethoscopic up till now restriction, teacher and student can only take turns auscultation, can not accomplish teacher, the same diseased region of student's auscultation simultaneously, has influenced teaching efficiency.
The purpose of this utility model is exactly the problem that exists in clinic at existing stethoscope, and a kind of electronic stethoscope that can make teacher and the same diseased region of numerous students auscultation simultaneously of design.
The purpose of this utility model is to realize like this, the sub-stethoscope of this teaching consuming energy comprises ear piece and chest piece, chest piece has a cylinder blanket, one metallic membrane is arranged at the bottom, and metallic membrane top is to help the operatic tunes, and pick off is positioned at and helps the operatic tunes, pick off one side has a metal catheter to link from helping to draw in the operatic tunes with ear piece, pick off links with the printed circuit board (PCB) on top again, and printed circuit board (PCB) is provided with acoustic-electric change-over circuit, audio amplifier circuit, pulse-generating circuit, counting circuit and display circuit, MICR
1V
1Form the acoustic-electric change-over circuit, field effect transistor V
1And resistance R
1The constant-current source that is constituted is taken on the load of pick off MIC, and MIC converts faint ticktock to the signal of telecommunication, and the signal of telecommunication is through C
1, R
1Be coupled to IC
1, R
3, R
4, R
5, C
3, C
4The amplifier that constitutes is done preposition amplification, low noise amplifier IC
1(LF356) be connected into anti-phase active Wen's wave filter, audio signal is passed through R from the output of 2 feet and from the input of 2 ' foot
7, R
8And C
6, C
7Deng the two-stage low-pass filter network of forming, deliver to IC through volume potentiometer RP again through filtered audio signal
2(M386) carry out power amplification, promote sound horn.
Owing to adopt such scheme, the teacher can make the same diseased region of numerous students auscultation simultaneously by the loudspeaker on the chest piece when auscultation.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing
Fig. 1 is the chest piece sectional view
1, metallic membrane 2, pick off 3, help the operatic tunes 4, metal catheter 5, circuit printing plate 6, three core sockets 7, switch
The chest piece appearance is cylindrical, the bottom is close to the metallic membrane 1 of skin during for auscultation, and metallic membrane 1 top is for helping the operatic tunes 3, and pick off 2 is positioned at and helps the operatic tunes 3, one side of pick off 2 have draw in the self-service operatic tunes 3 of a metal catheter and and ear piece link, pick off 2 tops and printed circuit board (PCB) link.
Fig. 2 is the acoustic-electric change-over circuit
MIC R
1V
1Form the acoustic-electric change-over circuit, field effect transistor V
1And resistance R
1The constant-current source that is constituted is taken on the load of pick off MIC, and MIC converts faint ticktock to the signal of telecommunication, and the signal of telecommunication is through C
1, R
1Be coupled to IC
1, R
3, R
4, R
5, C
3, C
4The amplifier that constitutes is done preposition amplification, low noise amplifier IC
1(LF356) be connected into anti-phase active Wen's wave filter, C
5, R
6Play output stopping direct current and stable phase angle respectively, R
5The distribution capacity of coaxial cable and IC
1Feedback network keep apart, avoid producing the higher-order of oscillation, audio signal is exported from 2 feet, D, C
2Be used for decoupling.
Fig. 3 is an audio amplifier circuit
Audio signal is passed through R from the input of 2 ' foot
7, R
8And C
6, C
7Deng the two-stage low-pass filter network of forming, the high audio composition that the elimination part is unnecessary improves tonequality, delivers to IC through volume potentiometer RP again through filtered audio signal
2(M386) carry out power amplification, promote sound horn.C
10Be power filtering capacitor, K
2Be on and off switch.
Claims (1)
1, the sub-stethoscope of a kind of teaching consuming energy, comprise ear piece and chest piece, it is characterized in that chest piece has a cylinder blanket, one metallic membrane is arranged at the bottom, and metallic membrane top is to help the operatic tunes, and pick off is positioned at and helps the operatic tunes, pick off one side has a metal catheter to link from helping to draw in the operatic tunes with ear piece, pick off links with the printed circuit board (PCB) on top again, and printed circuit board (PCB) is provided with acoustic-electric change-over circuit, audio amplifier circuit, pulse-generating circuit, counting circuit and display circuit, MIC R
1V
1Form the acoustic-electric change-over circuit, field effect transistor V
1And resistance R
1The constant-current source that is constituted is taken on the load of pick off MIC, and MIC converts faint ticktock to the signal of telecommunication, and the signal of telecommunication is through C
1, R
1Be coupled to IC
1, R
3, R
4, R
5, C
3, C
4The amplifier that constitutes is done preposition amplification, low noise amplifier IC
1(LF356) be connected into anti-phase active Wen's wave filter, audio signal is passed through R from the output of 2 feet and from the input of 2 ' foot
7, R
8And C
6, C
7Deng the two-stage low-pass filter network of forming, deliver to IC through volume potentiometer RP again through filtered audio signal
2(M386) carry out power amplification, promote sound horn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00213874 CN2428094Y (en) | 2000-03-08 | 2000-03-08 | Electronic medical stethophone for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00213874 CN2428094Y (en) | 2000-03-08 | 2000-03-08 | Electronic medical stethophone for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428094Y true CN2428094Y (en) | 2001-05-02 |
Family
ID=33580085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00213874 Expired - Fee Related CN2428094Y (en) | 2000-03-08 | 2000-03-08 | Electronic medical stethophone for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428094Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725782A (en) * | 2009-11-12 | 2012-10-10 | 拉尔多医疗公司 | Pulse simulation unit |
-
2000
- 2000-03-08 CN CN 00213874 patent/CN2428094Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725782A (en) * | 2009-11-12 | 2012-10-10 | 拉尔多医疗公司 | Pulse simulation unit |
| CN102725782B (en) * | 2009-11-12 | 2014-12-31 | 拉尔多医疗公司 | Pulse simulation unit |
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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 |