CN109935478B - Mechanical switch with contact isolation safety - Google Patents
Mechanical switch with contact isolation safety Download PDFInfo
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- CN109935478B CN109935478B CN201910007742.XA CN201910007742A CN109935478B CN 109935478 B CN109935478 B CN 109935478B CN 201910007742 A CN201910007742 A CN 201910007742A CN 109935478 B CN109935478 B CN 109935478B
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- 238000002955 isolation Methods 0.000 title claims abstract description 94
- 230000003068 static effect Effects 0.000 claims abstract description 47
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a mechanical switch with contact isolation insurance, which comprises a push rod, bridge frames, contact bridges, movable contacts and a static spring, wherein the bridge frames are connected through elastic sheets and are configured at two sides of the push rod in the moving direction; in the two bridge frames, grooves which are opened outwards along the horizontal direction are respectively arranged on the opposite outer sides, isolation bosses are arranged in the outer side spaces corresponding to the grooves of the bridge frames, when the elastic sheet connected with one bridge frame is broken, the bridge frame on the other side moves towards the outer side direction along the horizontal direction under the action of the other elastic sheet, the isolation bosses on the other side enter the grooves of the bridge frame on the other side, and the movable contact corresponding to the bridge frame on the other side is kept isolated from the corresponding static spring through mutual limitation between the isolation bosses and the grooves. After the structure is adopted, when one of the elastic sheets is broken, effective isolation between the movable contact and the static spring can be realized.
Description
Technical Field
The invention relates to the technical field of switches, in particular to a mechanical switch with contact isolation insurance.
Background
A mechanical switch is a device that opens, closes, or switches a circuit by mechanical manipulation of contacts. A mechanical switch of the prior art, as shown in fig. 1 to 3, fig. 1 is a schematic view of a state when a normally closed end of the mechanical switch of the prior art is operated, fig. 2 is a schematic view of a state when the normally open end of the mechanical switch of the prior art is operated, and fig. 3 is a schematic view of a state when a spring piece of the mechanical switch of the prior art is broken, the mechanical switch comprises a housing and two normally closed fixed springs 101, 102, two normally closed movable contacts 201, 202, two normally open fixed springs 301, 302, two normally open movable contacts 401, 402, two bridge frames 501, 502, two spring pieces 601, 602, a push rod 700 and two contact bridges 801, 802 installed in the housing; the contact bridge 801 is connected between the two normally closed movable contacts 201, 202, and the contact bridge 802 is connected between the two normally open movable contacts 401, 402; the pushing rod 700 is arranged approximately vertically, the two contact bridges 801 and 802 are arranged approximately transversely, the two bridge frames 501 and 502 are respectively fixed with the two contact bridges 801 and 802 and are respectively arranged at two sides of the pushing rod 700, one elastic sheet 601 is connected between the pushing rod 700 and the bridge frame 501, and the other elastic sheet 602 is connected between the pushing rod 700 and the bridge frame 502, so that a mechanical switch is formed. When the push rod 700 moves, the push rod 700 drives the bridges 501 and 502 to move through the elastic sheets 601 and 602, the bridges 501 and 502 drive the contact bridges 801 and 802 and drive the normally-closed movable contacts 201 and 202 and the normally-open movable contacts 401 and 402 to move through the contact bridges 801 and 802, so that contact switching is realized, when the mechanical switch is in a normally-closed end working state, a circuit formed by the normally-closed movable springs 101-201-801-202-102 is conducted (shown in fig. 1), when the mechanical switch is in a normally-open end working state, a circuit formed by the normally-open movable springs 301-401-802-402-302 is conducted (shown in fig. 2), when the elastic sheets (such as the elastic sheet 602 in fig. 3) are broken, the balance of the bridge is broken, and the connected contact groups (such as the normally-closed movable contacts 201 and 202 and the normally-closed movable springs 101 and 102 in fig. 1) cannot be influenced and isolated through the push rod 700, so that adverse effects on external control caused by long switching cannot be avoided. In order to avoid the defect caused by the broken bridge balance, in the prior art, an isolating contact structure is adopted to avoid the influence, a wedge block is designed on the bridge frames 501 and 502, a sliding ramp is designed on the shell, as shown in fig. 3, when one of the elastic sheets 601 and 602 breaks, the other elastic sheet 601 pushes the wedge block of the bridge frame 501 to slide along the transverse direction (i.e. perpendicular to the moving direction of the push rod 700), so that the normally-closed movable contact 201 and the normally-closed fixed spring 101 are misplaced, and when the whole assembly formed by the bridge frames 501 and 502 and the contact bridges 801 and 802 falls down, the normally-closed movable contact 201 and the normally-closed fixed spring 101 are not contacted, thereby achieving the purpose of making the normally-closed movable contact 101-normally-closed movable contact 201-normally-closed movable contact 202-normally-closed fixed spring 102 non-conductive. However, in the isolating contact structure of the mechanical switch, since the normally closed movable contact 201 is required to be separated from the normally closed fixed spring 101, the bridges 501 and 502 are required to slide for a long distance, the long sliding distance may cause the elastic sheet 601 to drop from between the bridge 501 and the pushing rod 700, and the falling of the elastic sheet 601 will cause the wedge-shaped block of the bridge 501 connected with the elastic sheet to not realize the isolation between the normally closed movable contact 201 and the normally closed fixed spring 101, that is, the non-conduction of the normally closed fixed spring 101-normally closed movable contact 201-contact bridge 801-normally closed movable contact 202-normally closed fixed spring 102 circuit cannot be realized, thereby affecting the normal use of the mechanical switch.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a mechanical switch with contact isolation safety, which can effectively ensure that when bridge balance is broken, namely one elastic sheet is broken, the effective isolation between a movable contact and a static spring is realized and the safety function is realized through structural improvement.
The technical scheme adopted for solving the technical problems is as follows: a mechanical switch with contact isolation insurance comprises a push rod capable of being controlled by external mechanical action to move vertically, bridge frames connected with corresponding elastic sheets and configured at two sides of the push rod in the moving direction, a contact bridge transversely connected to the two bridge frames, movable contacts arranged at two ends of the contact bridge and a static spring configured at the position corresponding to the movable contacts; in the two bridge frames, through grooves which are outwards opened along the horizontal direction are respectively arranged on the opposite outer sides, isolation bosses are arranged in the outer side spaces corresponding to the positions of the grooves of the bridge frames, when the elastic piece connected with one bridge frame is broken, the bridge frame on the other side moves towards the outer side direction of the other side along the horizontal direction under the action of the other elastic piece, the isolation bosses on the other side enter the grooves of the bridge frame on the other side, and the movable contact corresponding to the bridge frame on the other side is kept isolated from the corresponding static springs through mutual limitation between the isolation bosses and the grooves.
The number of the contact bridges is two, and the two contact bridges are connected to the two bridge frames in parallel approximately; the static springs comprise two normally closed static springs and two normally open static springs, and the movable contacts comprise two normally closed movable contacts and two normally open movable contacts; the two normally-closed movable contacts and the two normally-open movable contacts are respectively connected to two ends of the two contact bridges and distributed on the upper side of one contact bridge and the lower side of the other contact bridge, the normally-closed static spring is arranged at a position opposite to the normally-closed movable contact, and the normally-open static spring is arranged at a position opposite to the normally-open movable contact; the isolation boss is arranged between the normally closed movable contact and the normally open movable contact on the same side.
The two bridges respectively comprise an upper clamping part for assembling one contact bridge at the upper side and a lower clamping part for assembling one contact bridge at the lower side; the groove is arranged between the upper clamping part and the lower clamping part.
And an arc-shaped surface or an inclined surface which is convenient for guiding into the corresponding groove is arranged in the isolation boss.
The two bridges are respectively provided with a groove at two sides corresponding to the horizontal moving direction, and each groove is respectively corresponding to one isolation boss; openings which are communicated to the corresponding sides are further arranged in the grooves on the two sides of the bridge frame, which correspond to the horizontal moving direction, so that the isolation bosses on the corresponding sides can move along the openings; in the isolation lug boss of the corresponding side, the surface of the opening leading to the corresponding side is an arc-shaped surface or an inclined surface.
The cross section of the isolation boss corresponding to the cross section direction of the contact bridge is triangular or circular or elliptical.
Further, the bridge frame, the contact bridge, the movable contact and the static spring are accommodated in a shell in a cavity, and two isolation bosses of the bridge frame arranged on the same side are respectively integrally arranged at two opposite side walls of the shell.
Further, the device further comprises stop blocks arranged outside the opposite outer sides of the two bridge frames, and the stop blocks are arranged at positions corresponding to the upper clamping parts and/or the lower clamping parts of the bridge frames and used for limiting the bridge frames to excessively move towards the outer sides along the horizontal direction, so that the elastic sheets are kept within a preset compression range.
The stop block and the isolation boss are integrally connected.
In the upper clamping part and the lower clamping part of the bridge, inclined planes are respectively arranged on two sides of a central line moving along the horizontal direction of the bridge, and each inclined plane corresponds to one stop block.
Two stop blocks arranged on two sides of the upper clamping part and/or the lower clamping part of the bridge frame on the same side are respectively integrally arranged on two opposite side walls of the shell, and the distance from the stop block to the center line is smaller than the distance from the edge of the upper clamping part or the lower clamping part to the center line.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the through type grooves which are opened outwards along the horizontal direction and are respectively arranged at the opposite outer sides of the two bridge frames, and the isolation lug boss is arranged in the outer space corresponding to the groove position of the bridge frame, when the elastic sheet connected with one bridge frame breaks to enable the bridge frame on the other side to move towards the outer side direction of the other side along the horizontal direction under the action of the other elastic sheet, the isolation lug boss on the other side enters the groove of the bridge frame on the other side, and the movable contact corresponding to the bridge frame on the other side is kept isolated from the corresponding static spring through the mutual limit between the isolation lug boss and the groove. The structure of the invention uses the matching of the isolation boss and the groove of the bridge as the isolation contact structure, when one side spring piece is broken, the other side spring piece is driven by the movement of the push rod, so that the isolation boss on the other side enters the groove of the bridge on the other side, and the isolation between the movable contact corresponding to the bridge on the other side and the corresponding static spring is kept by the mutual limit between the isolation boss and the groove, thereby effectively ensuring the isolation between the movable contact and the static spring and playing a role of safety when the spring piece is broken.
2. The invention adopts the structure that the stop blocks are arranged outside the bridge frame relatively, and the stop blocks are arranged at the positions corresponding to the upper clamping part and/or the lower clamping part of the bridge frame so as to limit the bridge frame to excessively move towards the outer side along the horizontal direction, thereby keeping the elastic sheet within the preset compression range. The structure of the invention takes the stop block and the upper clamping part and/or the lower clamping part of the bridge as the supplementary structure of the isolation contact, and can limit the falling off of the elastic sheet from the bridge and the pushing rod caused by the excessive movement of the bridge in the outer direction along the horizontal direction, thereby further effectively ensuring the isolation between the movable contact and the static spring and playing a role of safety when the elastic sheet breaks.
The invention is described in further detail below with reference to the drawings and examples; a mechanical switch with contact isolation fuse of the present invention is not limited to the embodiments.
Drawings
FIG. 1 is a schematic diagram of a prior art mechanical switch in a normally closed end operating condition;
FIG. 2 is a schematic diagram of a state of the art mechanical switch when in normal-open operation;
FIG. 3 is a schematic diagram of a state of the art mechanical switch spring at break;
FIG. 4 is a schematic view of the normally closed operating condition of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken along line B-B in FIG. 4;
FIG. 7 is a schematic diagram of the instant breaking of the normally closed spring in the working state of the present invention;
FIG. 8 is a cross-sectional view taken along line C-C in FIG. 7;
FIG. 9 is a schematic perspective view of the bridge of the present invention;
FIG. 10 (a) is an enlarged schematic view of portion D of FIG. 8 (first step of isolating the boss from the recess);
FIG. 10 (b) is an enlarged schematic view of portion D in FIG. 8 (isolation of the boss from the groove process two);
FIG. 10 (c) is an enlarged schematic view of portion D of FIG. 8 (isolation of the lands and grooves, process three);
FIG. 10 (D) is an enlarged schematic view of portion D in FIG. 8 (isolation of land and groove process IV);
FIG. 11 is a schematic diagram of the breaking state of the normally closed operating state spring of the present invention;
FIG. 12 is a cross-sectional view taken along line E-E in FIG. 11;
FIG. 13 is a cross-sectional view taken along line F-F in FIG. 11;
FIG. 14 is a schematic diagram of the normally open operating condition of the present invention;
FIG. 15 is a cross-sectional view taken along line G-G in FIG. 14;
FIG. 16 is a schematic diagram of a normally open operating state dome rupture state according to the present invention;
FIG. 17 is a cross-sectional view taken along line H-H in FIG. 16;
fig. 18 is a schematic of the normally closed operating condition of the present invention (including the housing).
Detailed Description
Examples
Referring to fig. 4 to 18, a mechanical switch with contact isolation safety according to the present invention includes a push rod 1 capable of being vertically moved under the control of an external mechanical action, bridges 21, 22 disposed at both sides of the moving direction of the push rod through corresponding elastic sheet connection, contact bridges 31, 32 laterally connected to both bridges 21, 22, movable contacts disposed at both ends of the contact bridges, and a stationary spring disposed at a position corresponding to the movable contacts; in this embodiment, the elastic sheet 61 is connected between the pushing rod 1 and the bridge 21, the elastic sheet 62 is connected between the pushing rod 1 and the bridge 22, and the number of contact bridges is two, namely, the contact bridge 31 and the contact bridge 32, the contact bridge 31 is on the upper side, the contact bridge 32 is on the lower side, and the two contact bridges 31 and 32 are connected to the two bridges 21 and 22 in parallel approximately; the static springs comprise two normally closed static springs 411 and 412 and two normally open static springs 421 and 422, and the movable contacts comprise two normally closed movable contacts 511 and 512 and two normally open movable contacts 521 and 522; the two normally-closed movable contacts 511 and 512 are respectively connected to two ends of the lower contact bridge 32, and are distributed below the lower contact bridge 32, the two normally-open movable contacts 521 and 522 are respectively connected to two ends of the upper contact bridge 31, and are distributed above the upper contact bridge 31, the normally-closed fixed spring 411 is disposed at a position opposite to the normally-closed movable contact 511, that is, below the normally-closed movable contact 511, the normally-closed fixed spring 412 is disposed at a position opposite to the normally-closed movable contact 512, that is, below the normally-closed movable contact 512, the normally-open fixed spring 421 is disposed at a position opposite to the normally-open movable contact 521, that is, above the normally-open movable contact 521, and the normally-open fixed spring 422 is disposed at a position opposite to the normally-open movable contact 522, that is, above the normally-open movable contact 522. When the mechanical switch is in a normally-closed end working state, the loop normally-closed static spring 411, the normally-closed movable contact 511, the contact bridge 32, the normally-closed movable contact 512 and the normally-closed static spring 412 are conducted (shown in fig. 4), and when the mechanical switch is in a normally-open end working state, the loop normally-open static spring 421, the normally-open movable contact 521, the contact bridge 31, the normally-open movable contact 522 and the normally-open static spring 422 are conducted (shown in fig. 14); in the two bridge frames 21 and 22, through grooves 71 and 72 which are opened outwards along the horizontal direction are respectively arranged at the opposite outer sides, isolation bosses 81 and 82 are arranged in the outer side space corresponding to the groove positions of the bridge frames, when the elastic sheet 62 connected with one bridge frame 22 breaks to enable the bridge frame 21 on the other side to move towards the outer side direction along the horizontal direction under the action of the other elastic sheet 61, the isolation boss 81 on the other side enters the groove 71 of the bridge frame 21 on the other side (as shown in fig. 10), and the movable contact corresponding to the bridge frame 21 on the other side is kept isolated from the corresponding static spring through mutual limitation between the isolation boss 81 and the groove 71. That is, the normally closed movable contact 511 is kept isolated from the normally closed fixed spring 411, and the normally open movable contact 521 is kept isolated from the normally open fixed spring 421 (as shown in fig. 11), so that the loop normally closed fixed spring 411-normally closed movable contact 511-contact bridge 32-normally closed movable contact 512-normally closed fixed spring 412 is not open, and the loop normally open fixed spring 421-normally open movable contact 521-contact bridge 31-normally open movable contact 522-normally open fixed spring 422 is not open.
In the present embodiment, the normally closed movable contacts 511 and 512 are separate components, and the normally open movable contacts 521 and 522 are also separate components, and the both ends of the contact bridge 32 may be directly set as normally closed movable contacts, and the both ends of the contact bridge 31 may be directly set as normally open movable contacts, as needed.
In this embodiment, the isolation boss is disposed between the normally closed movable contact and the normally open movable contact on the same side. That is, the isolation boss 81 is provided between the normally closed movable contact 511 and the normally open contact 521 on the same side, and the isolation boss 82 is provided between the normally closed movable contact 512 and the normally open contact 522 on the same side.
In this embodiment, the two bridge frames respectively include an upper clamping portion for assembling the upper one contact bridge and a lower clamping portion for assembling the lower one contact bridge; taking the bridge 21 as an example, the bridge 21 includes an upper clamping portion 211 for fitting the upper one of the contact bridges 31 and a lower clamping portion 212 for fitting the lower one of the contact bridges 32, and the groove 71 of the bridge 21 is provided between the upper clamping portion 211 and the lower clamping portion 212. The bridge 22 is similar in construction.
In this embodiment, two grooves are respectively formed on two sides of the two bridges 21 and 22 corresponding to the horizontal moving direction, and taking the bridge 21 as an example, two grooves 71 are respectively formed on two sides of the bridge 21 corresponding to the horizontal moving direction, so that there are two grooves 71, each groove 71 corresponds to one isolation boss 81, and the number of the isolation bosses 81 is two; in the grooves 71 on two sides of the bridge 21 corresponding to the horizontal moving direction, there is also an opening 711 that opens to the corresponding side, so that the isolation boss 81 on the corresponding side moves along the opening, in this embodiment, the two grooves 71 of the bridge 21 are actually open together; in the isolation boss 81 of the corresponding side, the surface of the opening 711 facing the corresponding side is an arc surface or an inclined surface, in this embodiment, an inclined surface 811, and the purpose of the inclined surface 811 is to facilitate guiding into the corresponding groove 71. The bridge 22 and the isolation boss 82 are similar in construction.
In this embodiment, the cross-sectional shape of the isolation boss 81 corresponding to the cross-sectional direction of the contact bridge is triangular, and may be circular, elliptical, or the like.
Further, the device further comprises a housing 9 for accommodating the bridges 21, 22, the contact bridges 31, 32, the movable contact and the static spring in the cavity, wherein two isolation bosses of the bridge arranged on the same side are respectively and integrally arranged at two opposite side walls of the housing, namely, two isolation bosses 81 on the side of the bridge 21 are respectively and integrally arranged at two opposite side walls of the housing 9, and two isolation bosses 82 on the side of the bridge 22 are respectively and integrally arranged at two opposite side walls of the housing 9.
Further, stopper blocks 91, 92 are provided outside the opposite outer sides of the two bridges 21, 22, and the stopper blocks 91, 92 are provided at positions corresponding to the upper and lower clamping portions of the bridges for restricting excessive movement of the bridges 21, 22 in the horizontal direction toward the outer side, thereby keeping the elastic pieces 61, 62 within a preset compression range.
In this embodiment, in the upper clamping portion and the lower clamping portion of the bridge, two sides of a center line moving along a horizontal direction of the bridge are respectively provided with inclined planes, and each inclined plane corresponds to one stop block. In this way, the bridge 21 has two stoppers 91 corresponding to the upper clamping portion 211 and two stoppers 91 corresponding to the lower clamping portion 212, and the bridge 21 has four stoppers 91 in total.
Two stop blocks arranged on two sides of the upper clamping part and the lower clamping part of the bridge frame on the same side are respectively integrally arranged on two opposite side walls of the shell, and the distance from the stop block to the center line is smaller than the distance from two edges of the upper clamping part or the lower clamping part to the center line. Taking the bridge 21 as an example, two stop blocks disposed on two sides of the upper clamping portion 211 and the lower clamping portion 212 of the same side bridge 21 are integrally disposed on two opposite side walls of the housing respectively, that is, four stop blocks 91 are integrally disposed on two opposite side walls of the housing 9 respectively, and a distance L1 between the stop blocks 91 and the center line is smaller than a distance L2 between an edge of the upper clamping portion or the lower clamping portion and the center line (as shown in fig. 6).
In this embodiment, the stop block and the isolation boss are designed as an integral structure, but it is needless to say that the stop block and the isolation boss may be provided as separate components.
The invention relates to a mechanical switch with contact isolation insurance, wherein elastic sheets 61 and 62 are connected between bridges 21 and 22 and a push rod 1 after being properly compressed; after the push rod 1 is pressed, the elastic pieces 61 and 62 can be influenced, so that the elastic pieces 61 and 62 drive the normally closed contact group to be communicated with the normally closed static spring group to be communicated with the normally open contact group to be communicated with the normally open static spring group; after the pushing rod 1 is not pressed, the normally closed contact group and the normally closed static spring group are returned to the on state through the restoring spring. When the single-sided elastic sheet 62 breaks, the unbroken elastic sheet 61 pushes the bridge 21, 22 to move to the side of the unbroken elastic sheet 61, the stop piece 91 limits the lateral moving distance of the bridge 21, so that the elastic sheet 61 keeps a certain compression, the elastic sheet 61 is prevented from falling off from the bridge 21 and the pushing rod 1, the groove 71 of the bridge 21 is contacted with the isolation boss 81, the pushing rod 1 is driven to slide by affecting the elastic sheet 61 due to the fact that the pushing rod 1 is still continuously pressed from the outside, the bridge 21 is limited by the isolation boss 81, in this embodiment, the isolation boss 81 lifts the bridge 21, so that the normally closed movable contacts 511 and 512 are isolated from the normally closed static springs 411 and 412, and the normally open movable contacts 521 and 522 are isolated from the normally open static springs 421 and 422, namely, the loop normally closed static spring 411-normally closed movable contact 511-contact bridge 32-normally closed movable contact 512-normally closed static spring 412 are not communicated, and the loop normally open static spring 421-normally open movable contact 521-contact bridge 31-normally open movable contact 522-normally open static spring 422 are not communicated; regardless of how the push rod 1 is pressed, the contact pairs (such as the normally closed static spring 411 and the normally closed movable contact 511) can be isolated and play a role of safety.
The mechanical switch with contact isolation safety adopts through grooves 71 and 72 which are opened outwards along the horizontal direction and are respectively arranged at the opposite outer sides of two bridge frames 21 and 22, isolation bosses 81 and 82 are arranged in the outer side space corresponding to the groove positions of the bridge frames, when the elastic sheet 62 connected with one bridge frame 22 breaks to enable the bridge frame 21 on the other side to move towards the outer side direction along the horizontal direction under the action of the elastic sheet 61 on the other side, the isolation boss 81 on the other side enters the groove 71 of the bridge frame on the other side, and the movable contact corresponding to the bridge frame 21 on the other side is kept isolated from the corresponding static spring through mutual limiting between the isolation boss 81 and the groove 71. The structure of the invention is to match the isolation bosses 81 and 82 with the grooves 71 and 72 of the bridge frame to form an isolation contact structure, when one side spring piece 62 breaks, the other side spring piece 61 is driven by the motion of the push rod 1 to enable the isolation boss 81 on the other side to enter the groove 71 of the other side bridge frame 21, and the isolation between the movable contact corresponding to the other side bridge frame and the corresponding static spring is kept through the mutual limit between the isolation bosses and the grooves, so that the isolation between the movable contact and the static spring can be effectively ensured when the spring piece breaks, and the safety function is realized.
The mechanical switch with contact isolation safety of the present invention employs stop blocks 91, 92 provided outside the opposite sides of the bridge 21, 22, and the stop blocks 91, 92 are provided at positions corresponding to the upper and/or lower clamping portions of the bridge for restricting excessive movement of the bridge 21, 22 in the horizontal direction toward the outside direction, thereby keeping the elastic pieces 61, 62 within a preset compression range. The structure of the invention takes the stop blocks 91 and 92 and the upper clamping part and/or the lower clamping part of the bridge frame as the supplementary structure of the isolation contact, and can limit the excessive movement of the bridge frames 21 and 22 towards the outer direction along the horizontal direction to cause the elastic sheets 61 and 62 to drop from between the bridge frames 21 and 22 and the pushing rod 1, thereby further effectively ensuring the isolation between the movable contact and the static spring and playing a role of safety when the elastic sheets break.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (11)
1. A mechanical switch with contact isolation insurance comprises a push rod capable of being controlled by external mechanical action to move vertically, bridge frames connected with corresponding elastic sheets and configured at two sides of the push rod in the moving direction, a contact bridge transversely connected to the two bridge frames, movable contacts arranged at two ends of the contact bridge and a static spring configured at the position corresponding to the movable contacts; the method is characterized in that: and when the elastic sheet connected with one bridge frame is broken, the other bridge frame moves towards the outer side direction of the other side along the horizontal direction under the action of the other elastic sheet, the other isolation lug boss enters the groove of the other bridge frame, and the movable contact corresponding to the other bridge frame is kept isolated from the corresponding static spring through mutual limitation between the isolation lug boss and the groove.
2. The mechanical switch with contact isolation fuse of claim 1, wherein: the number of the contact bridges is two, and the two contact bridges are connected to the two bridge frames in parallel; the static springs comprise two normally closed static springs and two normally open static springs, and the movable contacts comprise two normally closed movable contacts and two normally open movable contacts; the two normally-closed movable contacts and the two normally-open movable contacts are respectively connected to two ends of the two contact bridges and distributed on the upper side of one contact bridge and the lower side of the other contact bridge, the normally-closed static spring is arranged at a position opposite to the normally-closed movable contact, and the normally-open static spring is arranged at a position opposite to the normally-open movable contact; the isolation boss is arranged between the normally closed movable contact and the normally open movable contact on the same side.
3. The mechanical switch with contact isolation fuse of claim 2, wherein: the two bridges respectively comprise an upper clamping part for assembling one contact bridge at the upper side and a lower clamping part for assembling one contact bridge at the lower side; the groove is arranged between the upper clamping part and the lower clamping part.
4. A mechanical switch with contact isolation safety according to claim 1 or 2 or 3, characterized in that: and an arc-shaped surface or an inclined surface which is convenient for guiding into the corresponding groove is arranged in the isolation boss.
5. A mechanical switch with contact isolation safety according to claim 3, wherein: the two bridges are respectively provided with a groove at two sides corresponding to the horizontal moving direction, and each groove is respectively corresponding to one isolation boss; openings which are communicated to the corresponding sides are further arranged in the grooves on the two sides of the bridge frame, which correspond to the horizontal moving direction, so that the isolation bosses on the corresponding sides can move along the openings; in the isolation lug boss of the corresponding side, the surface of the opening leading to the corresponding side is an arc-shaped surface or an inclined surface.
6. The mechanical switch with contact isolation fuse of claim 5, wherein: the cross section of the isolation boss corresponding to the cross section direction of the contact bridge is triangular or circular or elliptical.
7. The mechanical switch with contact isolation fuse of claim 5, wherein: further, the bridge frame, the contact bridge, the movable contact and the static spring are accommodated in a shell in a cavity, and two isolation bosses of the bridge frame arranged on the same side are respectively integrally arranged at two opposite side walls of the shell.
8. The mechanical switch with contact isolation fuse of claim 7, wherein: further, the device further comprises stop blocks arranged outside the opposite outer sides of the two bridge frames, and the stop blocks are arranged at positions corresponding to the upper clamping parts and/or the lower clamping parts of the bridge frames and used for limiting the bridge frames to excessively move towards the outer sides along the horizontal direction, so that the elastic sheets are kept within a preset compression range.
9. The mechanical switch with contact isolation fuse of claim 8, wherein: the stop block and the isolation boss are integrally connected.
10. The mechanical switch with contact isolation fuse of claim 8, wherein: in the upper clamping part and the lower clamping part of the bridge, inclined planes are respectively arranged on two sides of a central line moving along the horizontal direction of the bridge, and each inclined plane corresponds to one stop block.
11. The mechanical switch with contact isolation fuse of claim 10, wherein: two stop blocks arranged on two sides of the upper clamping part and/or the lower clamping part of the bridge frame on the same side are respectively integrally arranged on two opposite side walls of the shell, and the distance from the stop block to the center line is smaller than the distance from the edge of the upper clamping part or the lower clamping part to the center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910007742.XA CN109935478B (en) | 2019-01-04 | 2019-01-04 | Mechanical switch with contact isolation safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910007742.XA CN109935478B (en) | 2019-01-04 | 2019-01-04 | Mechanical switch with contact isolation safety |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109935478A CN109935478A (en) | 2019-06-25 |
| CN109935478B true CN109935478B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910007742.XA Active CN109935478B (en) | 2019-01-04 | 2019-01-04 | Mechanical switch with contact isolation safety |
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| CN (1) | CN109935478B (en) |
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| CN106992085A (en) * | 2017-06-05 | 2017-07-28 | 漳州聚安美电气科技有限公司 | The spacing universal switch of fine motion |
| CN107026042A (en) * | 2017-06-05 | 2017-08-08 | 漳州聚安美电气科技有限公司 | The spacing universal switch of fine motion list of dual spring |
| CN108400064A (en) * | 2018-05-14 | 2018-08-14 | 苏州超云新能源有限公司 | High voltage direct current break-make device anti-deflection mechanism and high voltage direct current break-make device |
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| US5875884A (en) * | 1996-10-30 | 1999-03-02 | Niles Parts Co., Ltd. | Slide switch apparatus |
| EP0945881A3 (en) * | 1998-03-25 | 2000-06-14 | Elektrotechnische Werke Fritz Driescher & Söhne GmbH | Electrical switch |
| WO2008061631A1 (en) * | 2006-11-22 | 2008-05-29 | Abb Ag | Double break installation switchgear |
| CN103503102A (en) * | 2011-03-17 | 2014-01-08 | 沙尔特宝有限公司 | Electrical snap-action switch |
| CN103177884A (en) * | 2011-12-26 | 2013-06-26 | 上海电科电器科技有限公司 | Contact structure of low-voltage apparatus |
| CN105097364A (en) * | 2015-05-07 | 2015-11-25 | 厦门宏发电力电器有限公司 | Magnetic latching relay applying flexible static spring |
| CN106992085A (en) * | 2017-06-05 | 2017-07-28 | 漳州聚安美电气科技有限公司 | The spacing universal switch of fine motion |
| CN107026042A (en) * | 2017-06-05 | 2017-08-08 | 漳州聚安美电气科技有限公司 | The spacing universal switch of fine motion list of dual spring |
| CN108400064A (en) * | 2018-05-14 | 2018-08-14 | 苏州超云新能源有限公司 | High voltage direct current break-make device anti-deflection mechanism and high voltage direct current break-make device |
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|---|---|
| CN109935478A (en) | 2019-06-25 |
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