CN202634392U - Sewing machine reflective photoelectric switch - Google Patents
Sewing machine reflective photoelectric switch Download PDFInfo
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- CN202634392U CN202634392U CN 201220157461 CN201220157461U CN202634392U CN 202634392 U CN202634392 U CN 202634392U CN 201220157461 CN201220157461 CN 201220157461 CN 201220157461 U CN201220157461 U CN 201220157461U CN 202634392 U CN202634392 U CN 202634392U
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- China
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- sewing machine
- transparent conductive
- photoelectric switch
- reflective photoelectric
- platen
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Abstract
The utility model provides a sewing machine reflective photoelectric switch, comprising a transparent conductive member embedded with a sewing machine platen and penetrating the platen until to the cloth on the upside of the platen; a photoelectric switch body arranged under the sewing machine platen and comprising a transmitting tube for emitting infrared lights through the transparent conductive member to the upside of the platen and a receiving tube receiving lights reflected by the cloth on the upside of the platen through the transparent conductive member and lights reflected in the transparent conductive member self. The sewing machine reflective photoelectric switch can conveniently and reliably detect cloth, is adaptable to local conditions and can avoid great change to a sewing machine itself. The detection effects are good and have high reliability.
Description
Technical field
The utility model relates to a kind of use in sewing machine reflective photoelectric switch.
Background technology
In the sewing machine field, reflective photoelectric switch generally uses now, and emission can be made an assembly with reception, the convenient installation.
The all reflective photoelectric switches in present market all are to be installed in parallel in emission with reception, and infrared transmitter is launched infrared light, block if any object and will launch infrared light, and receiving tube receives the just existence of ability judgment object of infrared light of reflection.Fig. 1 is the operation principle sketch map of a kind of use in sewing machine reflective photoelectric switch in the prior art, and present most of producers all adopt this mode.
As shown in Figure 1, optoelectronic switch 101 is installed on the top of platen 102, and infrared transmitter 103 constantly transmits light to platen 102.No matter have or not cloth 105 on the platen 102, infrared receiving tube 104 can both receive signal.Because cloth 105 is variant slightly with the reflection characteristic of platen 102, so the signal that infrared receiving tube 104 receives is variant slightly, reliability is not fine.Moreover optoelectronic switch 101 must be installed perpendicular to platen 102, and angled slightly difference will be brought very big influence to the reliability that detects.Sometimes in order to improve the reliability of detection, on platen 102, post reflective membrane, its shortcoming that life-span weak point is arranged easy to wear, the raising of reliability is also not obvious.Have, the sewing machine top must be provided with fixing position again, but this often has significant limitation.
Better way is installed in optoelectronic switch below the platen.Fig. 2 is the operation principle sketch map of another kind of use in sewing machine reflective photoelectric switch in the prior art, and its mounting means is also as shown in the figure.
In Fig. 2, cloth 205 is positioned on the platen 202, is equipped with the hole on the platen 202, and the size diameter in hole must be greater than the transmitting tube 203 of optoelectronic switch 201 and the summation of receiving tube 204.Shown in Fig. 2 was last, emission was different with the light path that receives, and the angle between them again can not be too big, otherwise the reliability of detection cloth 205 can be very poor.Like this, transmitting tube 203 and receiving tube 204 will be installed in the distant place of destage plate 202, and the maximum problem of this mode is that the hole on the platen 202 is easy to blocked and ineffective by dust.
Summary of the invention
The utility model technical problem to be solved provides a kind of use in sewing machine reflective photoelectric switch, can make things convenient for and detects cloth reliably.
For solving the problems of the technologies described above, the utility model provides a kind of use in sewing machine reflective photoelectric switch, comprising:
The transparent conductive part is inlayed with sewing machine table and to be installed together, and said transparent conductive part penetrates the cloth of said platen until said platen top;
The optoelectronic switch body is arranged at the below of sewing machine table, and it comprises:
Transmitting tube is launched infrared light through said transparent conductive part to said platen top;
Receiving tube, receive through said transparent conductive part said platen top the cloth reflection light and at the light of said transparent conductive part self internal reflection.
Alternatively, said transparent conductive part has a cavity, and the emission of said light is all carried out in said cavity with reflection.
Alternatively, the Circuits System of said reflective photoelectric switch comprises:
Power supply provides supply of electric power;
Microcontroller is connected with said receiving tube with said power supply respectively, receives the current signal that said receiving tube returns, and calculates the reflected current of said cloth;
Constant-current source is connected with said power supply, said microcontroller and said transmitting tube respectively, exports constant electric current according to the instruction of said microcontroller to said transmitting tube.
Alternatively, the material of said transparent conductive part is wear-resisting animi resin.
Alternatively, said microcontroller adopts the C8051F330 chip, and said constant-current source adopts can provide 545 milliamperes constant operating current source.
Compared with prior art, the utlity model has following advantage:
The utility model can make things convenient for and detect cloth reliably, suits measures to local conditions, and avoids sewing machine itself is done very big change.The detection of the utility model is respond well, and reliability is high, obtains good economic benefit.
Description of drawings
The utility model above-mentioned and other characteristic, character and advantage will become more obvious through the description below in conjunction with accompanying drawing and embodiment, wherein:
Fig. 1 is the operation principle sketch map of a kind of use in sewing machine reflective photoelectric switch in the prior art;
Fig. 2 is the operation principle sketch map of another kind of use in sewing machine reflective photoelectric switch in the prior art;
Fig. 3 is the mounting structure sketch map of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model;
Fig. 4 is the structural representation of transparent conductive part of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model;
Fig. 5 is the light path principle sketch map of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model;
Fig. 6 is the module frame chart of workflow of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the utility model is described further; Set forth more details in the following description so that make much of the utility model; But the utility model obviously can be implemented with the multiple alternate manner that is different from this description; Therefore those skilled in the art can do similar popularization, deduction according to practical situations under the situation of the utility model intension, should be with the protection range of content constraints the utility model of this specific embodiment.
Fig. 3 is the mounting structure sketch map of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model.As shown in the figure, this use in sewing machine reflective photoelectric switch 300 mainly comprises: optoelectronic switch body 301 and transparent conductive part 306.Wherein, transparent conductive part 306 is inlayed with sewing machine table 302 and is installed together, and transparent conductive part 306 penetrates the cloth 305 of platen 302 until platen 302 tops.And optoelectronic switch body 301 can be arranged at the below of sewing machine table 302, and it further can comprise transmitting tube 303 and receiving tube 304.Transmitting tube 303 is used for seeing through transparent conductive part 306 to platen 302 tops emission infrared light; Receiving tube 304 is used for seeing through the light of light and transparent conductive part 306 self internal reflection that transparent conductive part 306 receives cloth 305 reflections of platens 302 tops.
In the present embodiment, the thickness of platen 302 can 1.8 millimeters, lowly a bit reduce wear.The diameter of receiving tube 304 can be 1.6 millimeters, and the diameter of transmitting tube 303 can be 0.8 millimeter.In addition, Fig. 4 is the structural representation of transparent conductive part of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model, and this transparent conductive part 306 has a cavity, and in order to reach effective utilization of light, light is emission as much as possible entirely in this cavity.As shown in Figure 4, the material of this transparent conductive part 306 can be wear-resisting animi resin, and the angle of angle R must can be 29 degree less than 34 degree (refractive index of resin is generally about 1.5) in the present embodiment.The emission that characteristics of the present invention are exactly light is all carried out in same cavity with reflection.
Fig. 5 is the light path principle sketch map of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model.As shown in Figure 5, launch infrared lights when the infrared transmitting tube 503 of optoelectronic switch body 501 and in the cavity of transparent conductive part 506, make progress.Wherein light F is the reverberation of infrared light when running into the cloth 505 on the platen 502, and light G is the light of loss when not running into cloth 505, and light H is the reflects light in the cavity of transparent conductive part 506.When not having cloth 505 on the platen 502, light H that receiving tube 504 receives and extraneous stray light (following easy, that the influence removal of stray light is not considered) for setting forth; When on the platen 502 cloth 505 being arranged, emission light run into cloth 505 in cavity from reverberation H, more than by the light of cloth 505 emission, be received pipe 504 and receive together, thereby detect the cloth signal.
Fig. 6 is the module frame chart of workflow of the use in sewing machine reflective photoelectric switch of an embodiment of the utility model.As shown in Figure 6, the Circuits System 600 that this reflective photoelectric switch 300 needs to cooperate with it could be worked together.This Circuits System comprises at least: power supply 601, microcontroller 602 and constant-current source 603.Wherein, power supply 601 provides the supply of electric power of whole system.Microcontroller 602 is connected with receiving tube 605 with power supply 601 respectively, is used to receive the current signal that receiving tube 605 returns, and calculates the reflected current of cloth 305.Constant-current source 603 is connected with power supply 601, microcontroller 602 and transmitting tube 604 respectively, is used for exporting constant operating current according to the instruction of microcontroller 602 to transmitting tube 604.
In the present embodiment, microcontroller 602 can adopt the C8051F330 chip, also can adopt similar device; Constant-current source 603 can adopt can provide 545 milliamperes constant current source, and its objective is provides reliable electric current.It can not receive environment, temperature, device aging and the influence of the detection sensitivity brought constant-current source 603, and the constant current of general transmitting tube 604 is 20 milliamperes, and adopting so big electric current here is in order to improve the emissive porwer of infrared light.The operating efficiency of some reflective switch is not high, and most of light is absorbed by the external world, and rare reflection improves electric current and can improve reliability, also can reduce the influence (following elaboration) of surround lighting on the other hand.If so big electric current continues output, transmitting tube will lose efficacy for more than 604 seconds, adopted pulse mode here, duty ratio 1: 500, and average current will drop to the 545/500=1.1 milliampere, guarantees that the life-span of device has big emission current again.
Suppose the pulse of microcontroller 602 per 10 milliseconds of output 20 microseconds in the present embodiment; Photoelectric current when not having pulse is A1 (environmental interference), and the photoelectric current that records when pulse is arranged is A2 (cloth is arranged), no matter be A1 or A2; The influence of surround lighting is wherein all arranged; Suppose the internal reflection electric current A3 (light H) of the cavity of itself, the reflected current A4 when cloth is arranged (light F), A2=A3+A4+A1 so; If detect primary photoelectric current A5 when not having cloth, A5=A1+A3 then, so,
A2-A5
＝(A3+A4+A1)-(A1+A3)
=A4 (reflected current when cloth is arranged, the influence of self reflection interference has been eliminated automatically in surround lighting and the cavity)
In Circuits System, can also be furnished with the potentiometer (not shown) of setting above-mentioned A4 size, regulate suitable value and just can detect cloth very reliably.
The utility model can make things convenient for and detect cloth reliably, suits measures to local conditions, and avoids sewing machine itself is done very big change.The detection of the utility model is respond well, and reliability is high, obtains good economic benefit.
Though the utility model with preferred embodiment openly as above, it is not to be used for limiting the utility model, and any those skilled in the art can make possible change and modification in spirit that does not break away from the utility model and scope.Therefore, every content that does not break away from the utility model technical scheme, all falls within the protection range that the utility model claim defined any modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.
Claims (5)
1. a use in sewing machine reflective photoelectric switch is characterized in that, comprising:
The transparent conductive part is inlayed with sewing machine table and to be installed together, and said transparent conductive part penetrates the cloth of said platen until said platen top;
The optoelectronic switch body is arranged at the below of sewing machine table, and it comprises:
Transmitting tube is launched infrared light through said transparent conductive part to said platen top;
Receiving tube receives light and the light of said transparent conductive part self internal reflection of the cloth reflection of said platen top through said transparent conductive part.
2. use in sewing machine reflective photoelectric switch according to claim 1 is characterized in that, said transparent conductive part has a cavity, and the emission of said light is all carried out in said cavity with reflection.
3. use in sewing machine reflective photoelectric switch according to claim 1 and 2 is characterized in that, the Circuits System of said reflective photoelectric switch comprises:
Power supply provides supply of electric power;
Microcontroller is connected with said receiving tube with said power supply respectively, receives the current signal that said receiving tube returns, and calculates the reflected current of said cloth;
Constant-current source is connected with said power supply, said microcontroller and said transmitting tube respectively, exports constant electric current according to the instruction of said microcontroller to said transmitting tube.
4. use in sewing machine reflective photoelectric switch according to claim 1 and 2 is characterized in that, the material of said transparent conductive part is for transmitting the wear-resisting animi resin material of infrared light.
5. use in sewing machine reflective photoelectric switch according to claim 3 is characterized in that, said microcontroller adopts the C8051F330 chip, and said constant-current source adopts can provide 545 milliamperes constant operating current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157461 CN202634392U (en) | 2012-04-13 | 2012-04-13 | Sewing machine reflective photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157461 CN202634392U (en) | 2012-04-13 | 2012-04-13 | Sewing machine reflective photoelectric switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634392U true CN202634392U (en) | 2012-12-26 |
Family
ID=47387533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220157461 Expired - Fee Related CN202634392U (en) | 2012-04-13 | 2012-04-13 | Sewing machine reflective photoelectric switch |
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| Country | Link |
|---|---|
| CN (1) | CN202634392U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897237A (en) * | 2016-05-30 | 2016-08-24 | 宁波星宇极光传感科技有限公司 | Regression reflection photoelectric switch |
| CN106199752A (en) * | 2016-06-22 | 2016-12-07 | 浙江众邦机电科技有限公司 | A kind of cloth is by detection device |
-
2012
- 2012-04-13 CN CN 201220157461 patent/CN202634392U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897237A (en) * | 2016-05-30 | 2016-08-24 | 宁波星宇极光传感科技有限公司 | Regression reflection photoelectric switch |
| CN105897237B (en) * | 2016-05-30 | 2018-11-13 | 星宇电子(宁波)有限公司 | A kind of retroreflecting optoelectronic switch |
| CN106199752A (en) * | 2016-06-22 | 2016-12-07 | 浙江众邦机电科技有限公司 | A kind of cloth is by detection device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20160413 |