TWI550665B - To enhance the electrical insulation of the multi-command switch - Google Patents

Description

Multi-instruction switch for improving electrical insulation

The invention relates to a multi-instruction switch, in particular to a multi-instruction switch capable of improving electrical insulation.

As the volume of electronic devices becomes smaller and smaller, the design of electronic components is also miniaturized. For the switching components that output control signals, the current switching components can be found in the structure of the Republic of China No. M350087. No. 507921, No. 289485, and the like, wherein the switching element structure illustrated in FIG. 1 is used for description. The conventional switching element has a switch housing, a common pin 1, a normally closed pin 2, and a The switch housing 42 has an accommodating space, an elastic spring 41 disposed in the accommodating space, and a support frame 42 disposed in the accommodating space. The support frame 42 has a The elastic reed 41 is displaced by the displacement rail 421 therein, and an insulating stopper 422 disposed in the displacement rail 421. The common pin 1 extends through the accommodating space and is in conductive contact with the elastic spring 41. The normally open pin 3 is partially embedded in the support frame 42 and extends to The displacement rail 421 abuts against one side of the insulating block 422. The normally open pin 3 is formed with the switch housing portion exposed in the displacement rail 421, and the exposed portion abuts against the other side of the insulating block 422 and the normally closed pin 2. When the elastic reed 41 is pressed and displaced by the external force in the displacement rail 421, the elastic reed 41 crosses the insulating block 422 from the normally closed pin 2 that is originally in contact with the normally open pin 3 .

However, the elastic reed 41 contacts the normally closed pin 2 or the normally open pin 3 during the up and down movement, and the arc is melted by the discharge, and the carbon residue is sprayed around and accumulated on the insulating block. Above the 422, after a long time of accumulation, the carbon residue forms a conductive layer connecting the normally closed pin 2 and the normally open pin 3 on the insulating block 422. When the conductive layer is tested in the high voltage of the safety regulation, the normally closed pin 2 and the normally open pin 3 are electrically connected, so that the micro switch cannot be operated normally, and the safety regulation of the higher amperage cannot be ensured, and the product cannot be ensured. Yield.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a problem that overcomes the conventional switch structure and is susceptible to switch failure due to accumulation of carbon residue on the insulating block.

To achieve the above object, the present invention provides a multi-instruction switch for improving electrical insulation, a housing, a common pin and a switching pin set. The housing has an accommodating space, a conductive reed which is disposed on the accommodating space by a user to perform a reciprocating pressing stroke, and a support frame disposed in the accommodating space, the conductive reed has A normal connection segment and a switching connection segment, the support frame having a restriction track for the switching connection segment to be displaced therein. The common pin is disposed through the housing and extends in the accommodating space, and the normal state is in conductive contact with the normal connection segment. The switch pin set is disposed in the housing and extends in the accommodating space. The switch pin set includes a first pin and a second pin disposed on the support frame, and the first pin The foot has a contact segment located in the restriction track, the second pin having a trigger segment located in the restriction track, the restriction track having a first portion disposed between the contact segment and the trigger segment An insulating sheet, a second insulating sheet disposed between the contact portion and the triggering portion, and an insulating space between the first insulating sheet and the second insulating sheet.

In an embodiment, the support frame has a first support portion for fixing the first pin and a second support portion for fixing the second pin.

In one embodiment, the first support portion has a first fitting groove embedded in the first pin, and the second support portion has a pair of first fitting grooves and the first pin a second fitting groove embedded.

In an embodiment, the second support portion has a fixing groove for fixing the second pin.

In an embodiment, the first pin has a connecting portion that is embedded in the first supporting portion and connected to the contact portion.

In one embodiment, the first insulating sheet is connected to the first supporting portion and the second supporting portion, and the second insulating sheet is connected to the first supporting portion and the second supporting portion.

In one embodiment, the housing is a combination of a bottom case and a top cover.

In one embodiment, the housing has a plurality of pressing members that mount the conductive reed.

In one embodiment, the pressing member has a flexible support member that is deformed by the user during the reciprocating pressing stroke.

In one embodiment, the housing has a return spring disposed in the accommodating space and sleeved with the common pin and the conductive reed.

The structure of the present invention has the following features as compared with the conventional multi-instruction switch structure:

1. The multi-instruction switch for improving electrical insulation of the present invention utilizes the first insulating sheet, the second insulating sheet and the insulating space located in the limiting rail to improve insulation, and the first insulating sheet and the second insulating sheet can isolate the conductive spring Non-essential contact between the chip and the switching pin set, and the insulating space can avoid the carbon residue generated by the conductive reed during the switching process, causing the contact segment and the trigger segment to be indirectly turned on, thereby causing the switch to fail. . Therefore, the present invention can effectively improve the electrical insulation capability of the switch.

1‧‧‧Common feet

2‧‧‧Normally closed feet

3‧‧‧Normally open pins

41‧‧‧Flexible reeds

42‧‧‧Support frame

421‧‧‧displacement orbit

422‧‧‧Insulation stop

5‧‧‧Shell

51‧‧‧ accommodating space

52‧‧‧Electrical reeds

521‧‧‧Normal connection segment

522‧‧‧Switch connection segment

53‧‧‧Support frame

531‧‧‧Restricted orbit

532‧‧‧First support

533‧‧‧Second support

534‧‧‧First mating slot

535‧‧‧Second fitting groove

536‧‧‧fixed slot

537‧‧‧First insulation sheet

538‧‧‧Second insulation sheet

54‧‧‧ bottom case

55‧‧‧Top cover

56‧‧‧Pressing parts

561‧‧‧Flexible support

57‧‧‧Return spring

6‧‧‧Common feet

7‧‧‧First pin

71‧‧‧ Connection section

72‧‧‧Contact section

8‧‧‧second pin

81‧‧‧ trigger segment

S1‧‧‧Insulated space

Figure 1 is a partial schematic view of a conventional switch structure of the present invention.

2 is a schematic exploded view of the multi-instruction switch structure for improving electrical insulation of the present invention.

3 is a schematic exploded view of the multi-instruction switch structure for improving electrical insulation of the present invention.

4 is a schematic cross-sectional view of a multi-instruction switch for improving electrical insulation according to the present invention.

Figure 5-1 is a schematic cross-sectional view showing the release position of the A-A line segment in Figure 4 of the present invention.

Figure 5-2 is a cross-sectional view showing the pressing position of the A-A line segment of Figure 4 of the present invention.

FIG. 6 is a schematic view showing the structure of a bottom case of a multi-instruction switch for improving electrical insulation according to the present invention.

Figure 7 is a cross-sectional view showing the bottom case of the multi-instruction switch for electrically insulating the present invention.

The detailed description and technical contents of the present invention will now be described as follows:

The invention improves the electrically insulated multi-instruction switch, and the implementation aspect thereof has various implementation manners according to different application requirements, and the existing multi-instruction switch usually has at least two pins to switch and output a plurality of different instructions. The invention is exemplified only by a multi-instruction switch having a three-pin implementation, but is not limited thereto.

Referring to FIG. 2 to FIG. 4, FIG. 6 and FIG. 7, the multi-instruction switch for improving electrical insulation of the present invention comprises a housing 5, a common pin 6 and a first pin 7 and a second pin. 8 switch pin set. The housing 5 is hollowly formed with an accommodating space 51, a conductive reed 52 disposed in the accommodating space 51 and detachably received in the accommodating space 51 by an external force, and a connecting body 5 and disposed on the housing The support frame 53 in the accommodation space 51. More specifically, the housing 5 may be a combination of a bottom case 54 and a top cover 55. The conductive spring 52 has a normal connection section 521 and a switching connection section 522 connected to the normal connection section 521. . The support frame 53 can extend integrally from the bottom case 54 to the top cover 55, and the support frame 53 corresponds to the position of the connection connecting section 522, and has a restriction rail 531 for the switching connection section 522 to be displaced therein. The support frame 53 has a first support portion 532 for fixing the first pin 7 and a second support portion 533 for fixing the second pin 8 on the two sides of the limiting rail 531, and the first support portion 533 The support portion 532 has a first fitting groove 534 embedded in the first pin 7 , and the second support portion 533 has a pair of first fitting grooves 534 open for the first pin 7 to be embedded. The second fitting groove 535 and a fixing groove 536 for fixing the second pin 8. The common pin 6 , the first pin 7 and the second pin 8 respectively extend through the housing 5 and extend into the accommodating space 51 . The common pin 6 is normally and the normal state of the conductive reed 52 . The connecting portion 521 is in conductive contact, and the first pin 7 has a connecting portion 71 embedded in the first supporting portion 532, and a contact portion 72 extending from the connecting portion 71 into the limiting rail 531, the contact The segment 72 is normally electrically connected to the switching connection segment 522. The second pin 8 has a trigger segment 81 located within the limiting track 531. The limiting rail 531 has a first insulating sheet 537 disposed between the contact portion 72 and the triggering portion 81. The triggering portion 81 is disposed between the contact portion 72 and the triggering portion 81. The second insulating sheet 538 and an insulating space S1 between the first insulating sheet 537 and the second insulating sheet 538. In the embodiment, the first insulating sheet 537 is connected to the first supporting portion 532 and the second supporting portion 533 , and the second insulating sheet 538 is connected to the first supporting portion 532 and the second supporting portion 533 . In other embodiments, the first insulating sheet 537 and the second insulating sheet 538 can be two separate parts and are respectively joined to the first supporting portion 532 and the second supporting portion 533, but not in this embodiment. Limited. The thickness of the first insulating sheet 537 is greater than the thickness of the contact portion 72, and the thickness of the second insulating sheet 538 is greater than the thickness of the trigger segment 81. Further, the conductive reed 52 is generated during the switching process. The carbon slag cannot be accumulated between the contact section 72 and the trigger section 81, so that the carbon slag can be effectively prevented from conducting the contact section 72 and the trigger section 81. In addition, the housing 5 further has a plurality of pressing members 56 for mounting the conductive springs 52 and a return spring 57 disposed in the accommodating space 51 and sleeved with the common pins 6 and the conductive springs 52. The pressing member 56 further has a flexible support member 561 which is deformed by a user to deform.

Referring to FIG. 5-1 and FIG. 5-2 together, the conductive spring 52 is biased by the user in the accommodating space 51 for a reciprocating pressing stroke, and the conductive reed 52 has a reciprocating pressing stroke. The release position where the return spring 57 is abutted without being subjected to force, and a pressed position pressed by force. More specifically, the contact segment 72 of the first pin 7 and the trigger segment 81 of the second pin 8 are respectively located on the reciprocating pressing stroke. When the conductive spring 52 is in the release position, that is, the conductive spring 52 is not pressed, the switching connection portion 522 is in contact with the contact portion 72, so that the common pin 6 and the first pin 7 are Turn on. When the conductive spring 52 is displaced to the pressing position, the switching connection portion 522 is separated from the contact portion 72 and sequentially passes through the first insulating sheet 537, the insulating space S1 and the second insulating sheet 538, thereby The trigger segment 81 of the second pin 8 is in contact with the triggering portion 81 to be displaced to the pressing position, so that the common pin 6 and the second pin 8 are electrically connected.

The multi-instruction switch for improving electrical insulation of the present invention utilizes the first insulating sheet, the second insulating sheet, and the insulating space located in the limiting rail to improve insulation. When the conductive reed is displaced by the limiting rail, the first insulating sheet and the second insulating sheet can isolate unnecessary contact between the conductive reed and the switching pin group, and the insulating space can isolate the contact segment With the trigger segment. Therefore, the present invention can effectively improve the electrical insulation capability of the switch.

In summary, the present invention provides an electrically insulated multi-instruction switch comprising a housing, a common pin and a switching pin set. The housing has an accommodating space, a conductive reed disposed in the accommodating space, and a support frame disposed in the accommodating space and having a limiting track. The switch pin group is disposed in the accommodating space, and the switch pin set includes a first pin and a second pin disposed on the support frame, the first pin There is a contact segment located within the restriction track, the second pin having a trigger segment located within the restriction track, the restriction track having an insulating space between the trigger segment and the contact segment. Thereby, the carbon residue generated by the conductive reed during the switching process cannot be accumulated between the trigger segment and the contact segment, and can be surely applied to a higher amperage electronic device.

5‧‧‧Shell

52‧‧‧Electrical reeds

53‧‧‧Support frame

531‧‧‧Restricted orbit

532‧‧‧First support

533‧‧‧Second support

534‧‧‧First mating slot

535‧‧‧Second fitting groove

536‧‧‧fixed slot

537‧‧‧First insulation sheet

538‧‧‧Second insulation sheet

54‧‧‧ bottom case

55‧‧‧Top cover

56‧‧‧Pressing parts

561‧‧‧Flexible support

57‧‧‧Return spring

6‧‧‧Common feet

7‧‧‧First pin

72‧‧‧Contact section

8‧‧‧second pin

81‧‧‧ trigger segment

S1‧‧‧Insulated space

Claims (11)

A multi-instruction switch for improving electrical insulation, including:
a housing having an accommodating space, a conductive reed disposed on the accommodating space by a user to perform a reciprocating pressing stroke, and a support frame disposed in the accommodating space, the conductive reed Having a normal connection segment and a switching connection segment, the support frame has a restriction track for the switching connection segment to be displaced therein;
a common pin is disposed through the housing and extends in the accommodating space, and the normal state is in conductive contact with the normal connecting portion; and a switching pin group is disposed through the housing and extends in the accommodating space. The switching pin set includes a first pin and a second pin disposed on the support frame, the first pin has a contact segment located in the limiting track, and the second pin has a Limiting a trigger segment in the track, the limiting track has a first insulating sheet disposed between the contact segment and the trigger segment, and the trigger segment is disposed between the contact segment and the trigger segment a second insulating sheet, and an insulating space between the first insulating sheet and the second insulating sheet. The multi-instruction switch for improving electrical insulation according to Item 1, wherein the support frame has a first support portion for fixing the first pin and a second support portion for fixing the second pin. The multi-instruction switch for improving electrical insulation according to Item 2, wherein the first support portion has a first fitting groove embedded with the first pin, and the two supporting portions have a pair of first a fitting groove is formed in the second fitting groove that is embedded with the first pin. The multi-instruction switch for improving electrical insulation as described in claim 2, wherein the second support portion has a fixing groove for fixing the second pin. The multi-instruction switch for improving electrical insulation as described in claim 2, wherein the first pin has a connecting portion embedded in the first supporting portion and connected to the contact portion. The multi-instruction switch for improving electrical insulation according to Item 2, wherein the first insulating sheet is connected to the first supporting portion and the second supporting portion, and the second insulating sheet is connected to the first supporting portion and the first Two support parts. The multi-instruction switch for improving electrical insulation according to Item 1 or 6, wherein the thickness of the first insulating sheet is greater than the thickness of the contact portion, and the thickness of the second insulating sheet is greater than the thickness of the trigger portion. The multi-instruction switch for improving electrical insulation as described in claim 1, wherein the housing is a combination of a bottom case and a top cover. The multi-instruction switch for improving electrical insulation as described in claim 1, wherein the housing has a plurality of pressing members mounted with the conductive reed. The multi-instruction switch for improving electrical insulation according to claim 7, wherein the pressing member has a flexible support member that is deformed by the user during the reciprocating pressing stroke. The multi-instruction switch for improving electrical insulation as described in claim 1, wherein the housing has a return spring disposed in the accommodating space and sleeved with the common pin and the conductive reed.