CN110677147B - High-reliability photoelectric switch with micro-switch characteristic - Google Patents
High-reliability photoelectric switch with micro-switch characteristic Download PDFInfo
- Publication number
- CN110677147B CN110677147B CN201910769338.6A CN201910769338A CN110677147B CN 110677147 B CN110677147 B CN 110677147B CN 201910769338 A CN201910769338 A CN 201910769338A CN 110677147 B CN110677147 B CN 110677147B
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- switch
- base
- phototriode
- emitting diode
- light emitting
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- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
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- 239000000725 suspension Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- KTXUOWUHFLBZPW-UHFFFAOYSA-N 1-chloro-3-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C=C(Cl)C=CC=2)=C1 KTXUOWUHFLBZPW-UHFFFAOYSA-N 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Landscapes
- Push-Button Switches (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The invention provides a high-reliability photoelectric switch with a micro-switching characteristic, which comprises a base, a switch cover, a positioning card, a pressure spring and a photoelectric component, wherein the base is provided with a micro-switching mechanism; the working mode of the photoelectric switch is opposite-type, the photoelectric switch has the characteristic of contactless control, the service life of the switch is greatly prolonged, the high-precision control of the switch travel is ensured through the internal limiting structure, the switch output is reliable and stable, meanwhile, the switch is compatible with the action characteristic and the appearance of the micro switch, and the switch can be directly replaced in a control part using the micro switch; the problem that the reliability of the switch is affected due to suspension, poor contact of a low-level load, fusion welding of a high-current load contact and the like of the micro switch is solved by directly connecting the conducting strip with the light-emitting component, and the reliability of the switch can be greatly improved.
Description
Technical Field
The invention relates to a high-reliability photoelectric switch with a micro-switching characteristic.
Background
The high-reliability photoelectric switch with the micro-switch characteristic is characterized in that the key is used for pushing the positioning card, so that the light-transmitting hole on the positioning card moves up and down in the limiting block, light rays in the middle of the transmitter and the receiver are transmitted and blocked, and the switching action is realized. The device is mainly used for automatic control and monitoring in electronic, instrument, aviation, aerospace and mechanical appliances; the device is characterized in that when the device is arranged in an instrument in working, most of the time is in an initial free state, namely the output of the 3 feet of the switch is low level, when a key is pressed, the key pushes the positioning card to move downwards, the light-passing hole on the positioning card is turned on when the light-passing hole is moved to be overlapped with the light-transmitting hole at the receiver end of the limiting block, namely the switch is turned on, and the receiver outputs high level from the 3 feet of the switch; when the key is released, the pressure spring pushes the positioning card to move upwards, the light passing hole on the positioning card moves to be separated from the light passing hole at the receiver end of the limiting block, namely the switch is closed, the receiver outputs low level from the 3 feet of the switch, and the switch is restored to the initial state.
The common reversing mechanism of the micro switch is a tension spring type or a reed type, and the contact mode is contact. The reversing mechanism has low service life times, the reliability of switching is mainly dependent on the high precision of parts, the reliability is poor, and the problems of suspension, unstable contact, low repetition precision, large differential stroke and the like are easily caused; meanwhile, the contact mode is easy to cause the problems of poor contact of a low-level load, fusion welding of a high-current load contact and the like, and the reliability of the switch is affected.
The publication number is: the contactless photoelectric micro-switch device of CN201440649U eliminates the use of a tension spring or reed as a reversing mechanism, resets the switch by the thrust of a magnet,
but the on-off structure is complex, which is unfavorable for the manufacture of the parts of the product and the integral assembly of the product.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-reliability photoelectric switch with a micro-switch characteristic.
The invention is realized by the following technical scheme.
The invention provides a high-reliability photoelectric switch with a micro-switching characteristic, which comprises a base, a switch cover, a positioning card, a pressure spring and a photoelectric component, wherein the base is provided with a micro-switching mechanism;
the base is a supporting part, a photoelectric assembly is fixedly installed, and a conductive element is arranged to lead out signals of the photoelectric assembly;
the switch cover is arranged on the base to seal the element in the base in the space between the base and the switch cover;
the positioning card is an on-off device of a photoelectric component in the photoelectric component and slides in a limit groove arranged in the base;
the pressure spring is arranged in the base and provides resetting power for the positioning card.
The photoelectric assembly comprises an infrared light emitting diode and a phototriode which are oppositely arranged, the infrared light emitting diode and the phototriode are respectively arranged on two PCBs, a current limiting resistor is further arranged on the PCB connected with the infrared light emitting diode, and a pull-down resistor is further arranged on the PCB connected with the phototriode.
The conductive element comprises a short conductive piece and a long conductive piece, the short conductive piece and the long conductive piece are respectively provided with two groups corresponding to the infrared light emitting diode and the phototriode, the short conductive piece is connected with the negative electrode of the infrared light emitting diode or the output end of the phototriode through a jumper wire, and the long conductive piece is connected with the positive electrode of the infrared light emitting diode or the input end of the phototriode through the jumper wire.
The base middle part processing has the cylinder groove of installation pressure spring, and cylinder groove upper portion processing has the square groove, and square groove upper end both sides rigid coupling respectively has a stopper, and the opposite face of two stoppers is on the coplanar with the inner wall of square groove, installs the conducting strip in cylinder groove upper end, and the inner circle rigid coupling of conducting strip is on the outer wall of two stoppers, and the opposite both ends of outer lane of conducting strip are connected with infrared emitting diode and phototriode's negative pole respectively, and the same position is still processed respectively on two stoppers has the light trap of centre of a circle on same straight line, and two light trap correspond with infrared emitting diode's transmitting end and phototriode's receiving end respectively.
The positioning card is square plate, and the positioning card is installed between two stoppers, and processing has the through-hole on the positioning card, and when the bottom of positioning card contacted with the square groove bottom of installing pressure spring cylinder groove upper end, the through-hole position on the positioning card is between the light trap on two stoppers.
The cross section of the switch cover is U-shaped, an opening of the switch cover is arranged at the edge of the base, a step hole is processed in the middle of the switch cover, a key is arranged in the step hole, a limit table is processed along the maximum diameter of the step hole and perpendicular to the inside of the switch cover, the inner side of the limit table is in contact with the key, and the outer side of the limit table is in contact with two PCB boards.
The inner end of the key is provided with a directional groove, and one end of the positioning card is arranged in the directional groove.
The infrared light emitting diode and the phototriode are fixed on the base through epoxy resin.
The diameter of the light hole on the limiting block, which corresponds to the infrared light emitting diode, is not more than 9mm, and the diameter of the light hole on the limiting block, which corresponds to the phototriode, is not more than 5mm.
The invention has the beneficial effects that: the working mode of the photoelectric switch is opposite-type, the photoelectric switch has the characteristic of contactless control, the service life of the switch is greatly prolonged, the high-precision control of the switch travel is ensured through an internal limiting structure, the switch output is reliable and stable, meanwhile, the switch is compatible with the action characteristic and the appearance of the micro switch, and the switch can be directly replaced in a control part using the micro switch; the problem that the reliability of the switch is affected due to suspension, poor contact of a low-level load, fusion welding of a high-current load contact and the like of the micro switch is solved by directly connecting the conducting strip with the light-emitting component, and the reliability of the switch can be greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a switching circuit of the present invention;
in the figure: the device comprises a base, a 2-short conducting piece, a 3-long conducting piece, a 4-switch cover, a 5-positioning card, a 6-limiting block, a 7-infrared light emitting diode, an 8-phototriode, a 9-pull-down resistor, a 10-current limiting resistor, an 11-PCB (printed circuit board), a 12-key, a 13-pressure spring, a 14-jumper, a 15-conducting piece, a 16-emitter positive electrode, a 17-public grounding end, a 18-receiver positive electrode and a 19-receiver output end.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
A high-reliability photoelectric switch with micro-switch characteristics comprises a base 1, a switch cover 4, a positioning card 5, a pressure spring 13 and a photoelectric component;
the base 1 is a supporting part, is fixedly provided with a photoelectric component and is provided with a conductive element to lead out signals of the photoelectric component;
the switch cover 4 is arranged on the base 1 to seal the elements in the base 1 in the space between the base 1 and the switch cover 4;
the positioning card 5 is an on-off device of a photoelectric component in the photoelectric component and slides in a limit groove arranged in the base 1;
the pressure spring 13 is arranged in the base 1 and provides resetting power for the positioning card 5.
The photoelectric assembly comprises an infrared light emitting diode 7 and a phototriode 8 which are oppositely arranged, the infrared light emitting diode 7 and the phototriode 8 are respectively arranged on two PCB boards 11, a current limiting resistor 10 is further arranged on the PCB board 11 connected with the infrared light emitting diode 7, and a pull-down resistor 9 is further arranged on the PCB board 11 connected with the phototriode 8.
The conductive element comprises a short conductive piece 2 and a long conductive piece 3, the short conductive piece 2 and the long conductive piece 3 are respectively provided with two groups corresponding to the infrared light emitting diode 7 and the phototriode 8, the short conductive piece 2 is connected with the negative electrode of the infrared light emitting diode 7 or the output end of the phototriode 8 through a jumper 14, and the long conductive piece 3 is connected with the positive electrode of the infrared light emitting diode 7 or the input end of the phototriode 8 through the jumper 14.
The middle part processing of base 1 has the cylinder groove of installation pressure spring 13, cylinder groove upper portion processing has the square groove, square groove upper end both sides rigid coupling respectively has a stopper 6, the opposite face of two stoppers 6 is on the coplanar with the inner wall of square groove, install conducting strip 15 in cylinder groove upper end, the inner circle rigid coupling of conducting strip 15 is on the outer wall of two stoppers 6, the opposite both ends of outer lane of conducting strip 15 are connected with infrared emitting diode 7 and the negative pole of phototriode 8 respectively, the light trap that the centre of a circle is on same straight line is still processed respectively to the same position on two stoppers 6, two light traps correspond with the transmitting end of infrared emitting diode 7 and the receiving end of phototriode 8 respectively.
The positioning card 5 is a square plate, the positioning card 5 is arranged between the two limiting blocks 6, a through hole is formed in the positioning card 5, and when the bottom of the positioning card 5 is contacted with the bottom of the square groove at the upper end of the cylinder groove provided with the pressure spring 13, the position of the through hole in the positioning card 5 is between the light holes in the two limiting blocks 6.
The cross-section of switch cover 4 is the U type, and the edge at base 1 is installed to the opening of switch cover 4, and the middle part processing of switch cover 4 has the step hole, and button 12 is installed in the step hole, and the maximum diameter along the step hole is perpendicular to the inside processing of switch cover 4 has the spacing platform, and spacing inboard contacts with button 12, and spacing platform outside contacts with two PCB boards 11.
The inner end of the key 12 is provided with a directional groove, and one end of the positioning card 5 is arranged in the directional groove.
The infrared light emitting diode 7 and the phototriode 8 are fixed on the base 1 through epoxy resin.
The diameter of the light hole on the limiting block 6 corresponding to the infrared light emitting diode 7 is not more than 9mm, and the diameter of the light hole on the limiting block 6 corresponding to the phototriode 8 is not more than 5mm.
The high-reliability photoelectric switch with the micro-switching characteristic structurally comprises a switch cover 4, a base 1, an infrared light-emitting diode 7, a phototriode 8, a current limiting resistor 10, a pull-down resistor 9, a PCB 11, a limiting block 6, a positioning card 5, a key 12, a pressure spring 13, a jumper 14, a conducting plate 15, a short conducting piece 2 and a long conducting piece 3.
The base 1 of the base component is internally provided with the pressure spring 13, the conducting strip 15 is arranged at the upper end of the pressure spring 13 and is clung to the base 1 of the base component, meanwhile, the two ends of the conducting strip 15 are respectively welded at the negative ends of the illuminator and the receiver of the base component, the conducting strip 15 is led out through the No. 2 pin of the switch, the limiting block 6 is connected with the conducting strip 15 and is tightly pressed on the base 1 of the base component, the lower end of the positioning card 5 passes through the limiting hole of the limiting block 6 and is pressed on the pressure spring 13, the upper end of the positioning card 5 is connected with the lower end of the key 12, the top end of the key 12 passes through the limiting hole of the top end of the switch cover 4 and is clung to the limiting table on the inner wall of the switch cover 4, and the lower end of the switch cover 4 is connected with the base 1 of the base component.
The base assembly is composed of a base 1, a transmitter, a receiver, a jumper 14, a short conductive member 2 and a long conductive member 3. Wherein the emitter positive terminal is welded to the long conductive member 3 via jumper 14 and is fitted into the No. 1 hole of the base 1, the emitter negative terminal is welded to the short conductive member 2 via jumper 14 and is fitted into the No. 2 hole of the base 1, the receiver positive terminal is welded to the long conductive member 3 via jumper 14 and is fitted into the No. 4 hole of the base 1, the receiver output terminal is welded to the short conductive member 2 via jumper 14 and is fitted into the No. 3 hole of the base 1, and the receiver negative terminal is bridged to the emitter negative terminal via conductive sheet 15 at the rear. All long conducting pieces 3 and short conducting pieces 2 which are arranged on the base 1 are required to be riveted through special fixtures and then fastened by epoxy resin glue, and a transmitter and a receiver which are arranged at the upper end of the base 1 are clamped through special precision fastening fixtures and fixed by epoxy resin glue, so that the high-precision requirement of the size is ensured.
The emitter is welded on a corresponding bonding pad on a PCB 11 by an infrared light emitting diode 7 as shown in FIG. 2 to be used as the front surface of the emitter; the current limiting resistor 10 is soldered to a corresponding pad of the PCB 11 to form an emitter.
The receiver is welded on a corresponding bonding pad on the PCB 11 by the photosensitive transistor 8, and is used as the front face of the receiver, and the pull-down resistor 9 is welded on the corresponding bonding pad on the PCB 11 to be combined into the receiver.
Claims (1)
1. The utility model provides a high reliable photoelectric switch with micro-gap switch characteristic, includes base (1), switch cover (4), locator card (5), pressure spring (13), photoelectric element, its characterized in that:
the base (1) is a supporting part, is fixedly provided with a photoelectric assembly and is provided with a conductive element to lead out signals of the photoelectric assembly;
the switch cover (4) is arranged on the base (1) to seal elements in the base (1) in a space between the base (1) and the switch cover (4);
the positioning card (5) is an on-off device of a photoelectric component in the photoelectric component and slides in a limit groove arranged in the base (1);
the pressure spring (13) is arranged in the base (1) and provides resetting power for the positioning card (5);
the positioning card (5) is a square plate, the positioning card (5) is arranged between the two limiting blocks (6), a through hole is formed in the positioning card (5), and when the bottom of the positioning card (5) is in contact with the bottom of the square groove at the upper end of the cylindrical groove provided with the pressure spring (13), the through hole in the positioning card (5) is positioned between the light holes in the two limiting blocks (6);
the diameter of a light hole corresponding to the infrared light emitting diode (7) on the limiting block (6) is not more than 9mm, and the diameter of a light hole corresponding to the phototriode (8) on the limiting block (6) is not more than 5mm;
the section of the switch cover (4) is U-shaped, an opening of the switch cover (4) is arranged at the edge of the base (1), a step hole is processed in the middle of the switch cover (4), a key (12) is arranged in the step hole, a limit table is processed along the maximum diameter of the step hole and perpendicular to the inside of the switch cover (4), the inner side of the limit table is contacted with the key (12), and the outer side of the limit table is contacted with two PCB boards (11);
the photoelectric assembly comprises an infrared light emitting diode (7) and a phototriode (8) which are oppositely arranged, wherein the infrared light emitting diode (7) and the phototriode (8) are respectively arranged on two PCB boards (11), a current limiting resistor (10) is further arranged on the PCB board (11) connected with the infrared light emitting diode (7), and a pull-down resistor (9) is further arranged on the PCB board (11) connected with the phototriode (8);
the conductive element comprises a short conductive piece (2) and a long conductive piece (3), wherein the short conductive piece (2) and the long conductive piece (3) are respectively provided with two groups corresponding to the infrared light emitting diode (7) and the phototriode (8), the short conductive piece (2) is connected with the negative electrode of the infrared light emitting diode (7) or the output end of the phototriode (8) through a jumper wire (14), and the long conductive piece (3) is connected with the positive electrode of the infrared light emitting diode (7) or the input end of the phototriode (8) through the jumper wire (14);
the middle part of the base (1) is provided with a cylindrical groove for installing a pressure spring (13), the upper part of the cylindrical groove is provided with a square groove, two sides of the upper end of the square groove are respectively fixedly connected with a limiting block (6), the opposite surfaces of the two limiting blocks (6) are on the same plane with the inner wall of the square groove, the upper end of the cylindrical groove is provided with a conducting strip (15), the inner ring of the conducting strip (15) is fixedly connected with the outer walls of the two limiting blocks (6), two opposite ends of the outer ring of the conducting strip (15) are respectively connected with the infrared light emitting diode (7) and the negative electrode of the phototriode (8), the same positions of the two limiting blocks (6) are respectively provided with light holes with the centers on the same straight line, and the two light holes respectively correspond to the emitting end of the infrared light emitting diode (7) and the receiving end of the phototriode (8);
a directional groove is formed in the upper inner end of the key (12), and one end of the positioning card (5) is arranged in the directional groove;
the infrared light emitting diode (7) and the phototriode (8) are fixed on the base (1) through epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769338.6A CN110677147B (en) | 2019-08-20 | 2019-08-20 | High-reliability photoelectric switch with micro-switch characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769338.6A CN110677147B (en) | 2019-08-20 | 2019-08-20 | High-reliability photoelectric switch with micro-switch characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110677147A CN110677147A (en) | 2020-01-10 |
| CN110677147B true CN110677147B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910769338.6A Active CN110677147B (en) | 2019-08-20 | 2019-08-20 | High-reliability photoelectric switch with micro-switch characteristic |
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| Country | Link |
|---|---|
| CN (1) | CN110677147B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203014768U (en) * | 2013-01-24 | 2013-06-19 | 衢州昀睿工业设计有限公司 | Non-contact button switch for controlling work in positive direction and negative direction |
| CN203261307U (en) * | 2013-03-30 | 2013-10-30 | 钱江 | Electronic microswitch |
| CN105374599A (en) * | 2015-08-31 | 2016-03-02 | 东莞市长资实业有限公司 | Leveraged input device micro switch key |
| CN206135869U (en) * | 2016-09-26 | 2017-04-26 | 杨洪 | Photoelectric conversion switch module |
| CN107180719A (en) * | 2017-07-11 | 2017-09-19 | 东莞市高特电子有限公司 | One kind heavy board-like ultra-thin photoelectric mechanical keyboard switch and keyboard |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8772658B2 (en) * | 2011-11-03 | 2014-07-08 | Ching-Hsiung Chu | Electrically conductive structure of micro switch |
-
2019
- 2019-08-20 CN CN201910769338.6A patent/CN110677147B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203014768U (en) * | 2013-01-24 | 2013-06-19 | 衢州昀睿工业设计有限公司 | Non-contact button switch for controlling work in positive direction and negative direction |
| CN203261307U (en) * | 2013-03-30 | 2013-10-30 | 钱江 | Electronic microswitch |
| CN105374599A (en) * | 2015-08-31 | 2016-03-02 | 东莞市长资实业有限公司 | Leveraged input device micro switch key |
| CN206135869U (en) * | 2016-09-26 | 2017-04-26 | 杨洪 | Photoelectric conversion switch module |
| CN107180719A (en) * | 2017-07-11 | 2017-09-19 | 东莞市高特电子有限公司 | One kind heavy board-like ultra-thin photoelectric mechanical keyboard switch and keyboard |
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| Publication number | Publication date |
|---|---|
| CN110677147A (en) | 2020-01-10 |
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