CN217983104U - Travel switch with high-reliability contact - Google Patents
Travel switch with high-reliability contact Download PDFInfo
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- CN217983104U CN217983104U CN202221521258.2U CN202221521258U CN217983104U CN 217983104 U CN217983104 U CN 217983104U CN 202221521258 U CN202221521258 U CN 202221521258U CN 217983104 U CN217983104 U CN 217983104U
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- contact system
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Abstract
The utility model provides a high reliable contact travel switch, which comprises an external force transmission mechanism; the external force transmission mechanism is connected with the static contact system, and a cover plate connected with the external force transmission mechanism is sleeved outside the static contact system; the external force transmission mechanism comprises a movable contact system and a shell sleeved outside the movable contact system, the shell is connected with the cover plate, and the movable contact system is connected with the static contact system. The novel relative ratio is used for only increasing the micro switch, the travel switch for driving the switch unit inside the travel mechanism to switch is used, the electric contact part of the switch is more reliable, the electric contact part is designed by double-redundancy elastic contact, two contact pieces are symmetrically installed in parallel to control a group of circuit signals, and the switch can bear random vibration and impact from 6 degrees of freedom and always keeps reliable contact when being pressed for a long time or in a free state.
Description
Technical Field
The utility model relates to a travel switch of high reliable contact belongs to electromechanical component technical field.
Background
With the development of aerospace equipment, the requirements on service panel control system equipment are increasing, and a travel switch capable of safely and automatically suppressing/controlling a service panel command under a long-term pressing condition and in the rebound process is required. For part of airborne service panel control system equipment, a travel switch is required to be pressed for a long time through a protective cover, and the contact of the travel switch is required not to be disconnected under the conditions of long-time pressing and strong vibration on the airborne equipment, so that a flicker signal cannot appear.
At present, a microswitch is only additionally arranged in a large multi-stroke switch, and the switch unit inside the microswitch is driven to convert through a stroke-increasing mechanism, but due to the characteristics of the microswitch structure, the contact is easily disconnected due to the fact that the microswitch bears overlarge vibration, and then a flicker signal appears, so that the installation and use requirements of part of airborne service panel control system equipment cannot be met.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a travel switch of high reliable contact.
The utility model discloses a following technical scheme can realize.
The utility model provides a travel switch with high reliable contact, which comprises an external force transmission mechanism; the external force transmission mechanism is connected with the static contact system, and a cover plate connected with the external force transmission mechanism is sleeved outside the static contact system; the external force transmission mechanism comprises a movable contact system and a shell sleeved outside the movable contact system, the shell is connected with the cover plate, and the movable contact system is connected with the static contact system; the movable contact system comprises a push rod, a limit step is arranged on the push rod, and an inner insulation bushing, a contact ring and an outer insulation bushing are sequentially sleeved under the limit step; a plastic guide sleeve and a metal guide sleeve are sequentially sleeved outside the inner insulation bushing, the contact ring and the outer insulation bushing, and a pressure spring is arranged between the limiting step and the metal guide sleeve; the push rod is connected with the shell through a sealing ring, and the plastic guide sleeve and the metal guide sleeve are pressed and fixed through the fixed seat; the static contact system comprises a supporting seat connected with the bottom of the shell, and a lead is welded on the supporting seat.
And the shell is provided with a plurality of mounting nuts and rotation stopping washers for mounting and locking the switch.
And a supporting plate for assisting in mounting and locking the switch is arranged between the rotation stopping washers.
The cover plate penetrates through the bottom of the cover plate through a plurality of countersunk head screws and is locked and fixed on the shell.
And a through hole is formed in the bottom of the cover plate, and epoxy resin glue is sealed and filled through the through hole.
The inner insulation bushing, the contact ring and the outer insulation bushing are fixed on the push rod through nuts and are evenly coated with thread glue.
The shell is internally provided with a guide cavity for connecting the push rod and a U-shaped annular groove for installing the sealing ring, and lubricating grease is uniformly coated on the sealing ring.
One end of the wire is welded on the supporting seat through soldering tin, and the rest part of the wire is fixed on the shell through a countersunk head screw and a wire clamp.
The upper end face of the supporting seat is provided with a plurality of uniformly distributed contact pieces, the lower end face of the supporting seat is provided with a conducting strip, and the contact pieces and the conducting strip are connected with the supporting seat through rivets.
The fixing seat is screwed and fixed on the shell through threads, and thread glue is evenly smeared on the fixing seat.
The beneficial effects of the utility model reside in that: compared with the internal structure in which only a microswitch is added, the travel switch converted by the internal switch unit is driven by the travel-increasing mechanism, the electric contact part of the switch is more reliable, the electric contact part is designed by dual-redundancy elastic contact, two contact pieces are symmetrically arranged and connected in parallel to control a group of circuit signals, and the switch can bear random vibration and impact from 6 degrees of freedom and always keeps reliable contact under long-term pressing or free state.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the bottom opening cover plate of the switch of FIG. 1 without glue;
FIG. 3 is a schematic structural view of the external force transfer mechanism of FIG. 1;
FIG. 4 is a schematic diagram of the dynamic contact system of FIG. 3;
FIG. 5 is a block diagram of the stationary contact system of FIG. 1;
fig. 6 is a schematic circuit diagram of the present invention;
in the figure: 1-external force transmission mechanism, 2-mounting nut, 3-rotation stopping washer, 4-supporting plate, 5-static contact system, 6-cover plate, 7-lead, 8-M2 countersunk screw, 9-M1.6 countersunk screw, 10-line clamp, 11-dynamic contact system, 12-shell, 13-sealing ring, 14-pressure spring, 15-plastic guide sleeve, 16-metal guide sleeve, 17-fixing seat, 18-push rod, 19-internal insulation bushing, 20-contact ring, 21-external insulation bushing, 22-nut, 23-contact piece, 24-rivet, 25-support seat and 26-conducting strip.
Detailed Description
The technical solutions of the present invention are further described below, but the scope of protection claimed is not limited to the described ones.
Example 1
A highly reliable contact travel switch as shown in fig. 1 to 5 includes an external force transmission mechanism 1; the external force transmission mechanism 1 is connected with a static contact system 5, and a cover plate 6 connected with the external force transmission mechanism 1 is sleeved outside the static contact system 5; the external force transmission mechanism 1 comprises a movable contact system 11 and a shell 12 sleeved outside the movable contact system 11, the shell 12 is connected with a cover plate 6, and the movable contact system 11 is connected with a static contact system 5; the movable contact system 11 comprises a push rod 18, a limiting step is arranged on the push rod 18, and an inner insulating bush 19, a contact ring 20 and an outer insulating bush 21 are sequentially sleeved under the limiting sleeve; a plastic guide sleeve 15 and a metal guide sleeve 16 are sequentially sleeved outside the inner insulation bushing 19, the contact ring 20 and the outer insulation bushing 21, and a pressure spring 14 is arranged between the limiting step and the metal guide sleeve 16; the push rod 18 is connected with the shell 12 through a sealing ring 13, and the plastic guide sleeve 15 and the metal guide sleeve 16 are pressed and fixed through a fixed seat 17; the static contact system 5 comprises a support 25 connected to the bottom of the housing 12, and the conductor 7 is welded to the support 25.
The housing 12 is provided with a plurality of mounting nuts 2 and a rotation stop washer 3 for mounting and locking the switch.
And a supporting plate 4 for assisting in mounting and locking the switch is arranged between the rotation stopping washers 3.
The cover plate 6 is fastened to the housing 12 by means of a plurality of countersunk screws 8 extending through the bottom.
And a through hole is formed in the bottom of the cover plate 6, and epoxy resin glue is sealed and filled in the through hole.
The inner insulation bushing 19, the contact ring 20 and the outer insulation bushing 21 are fixed on the push rod 18 through nuts 22 and are evenly coated with thread glue.
The shell 12 is provided with a guide cavity for connecting the push rod 18 and a U-shaped annular groove for installing the sealing ring 13, and lubricating grease is uniformly coated on the sealing ring 13.
One end of the lead 7 is soldered to the support base 25, and the remaining portion is fixed to the housing 12 by means of the countersunk head screw 9 and the wire clip 10.
The upper end face of the supporting seat 25 is provided with a plurality of uniformly distributed contact pieces 23, the lower end face is provided with a conducting piece 26, and the contact pieces 23 and the conducting piece 26 are connected with the supporting seat 25 through rivets 24.
The fixed seat 17 is screwed and fixed on the shell 12 through threads, and thread glue is uniformly coated on the fixed seat.
And a limiting platform is arranged on the shell 12, and the plastic guide sleeve 15 and the metal guide sleeve 16 are fixed between the limiting step and the fixed seat 17.
Example 1
The protocol of example 1 was followed and:
as shown in fig. 1, 2 mounting nuts 2 and 2 rotation-stopping washers 3 are respectively mounted on a housing 12 of an external force transmission mechanism 1 for mounting a locking switch; the supporting plate 4 is an auxiliary mounting panel, is arranged among the 2 rotation stopping washers 3 and is used for assisting in mounting the locking switch; the cover plate 6 is fixedly penetrated, locked and fixed on a shell 12 1 of the external force transmission mechanism 1 from the bottom through 3M 2 countersunk head screws 8, 1 through hole is processed at the bottom of the cover plate 6, and epoxy resin glue is filled in the through hole in a sealing mode so as to improve the electrical insulation performance; one end of the lead 7 is fixed on a conducting strip 25 of the static contact system 5 by soldering tin, and 2M 1.6 countersunk screws 9 penetrate through the line card 10 to press and fix the lead 7 on a shell 12 of the external force transmission mechanism 1.
The external force transmission mechanism as shown in fig. 2 includes a movable contact system 11, a housing 12, a sealing ring 13, a pressure spring 14, a plastic guide sleeve 15, a metal guide sleeve 16 and a fixing seat 17, wherein the sealing ring 13 is installed in a U-shaped annular groove of the housing 12 and is uniformly coated with grease on the sealing ring 13 to realize sliding seal of the switch, and the movable contact system 11 passes through a guide cavity of the housing 12; the pressure spring 14 is arranged between a limiting step of the push rod 18 and the metal guide sleeve 16, and the plastic guide sleeve 16 and the metal guide sleeve 16 penetrate through the movable contact system 11 to provide guidance for the movable contact system 11; the fixing seat 17 is screwed and fixed on the shell 12 through threads, is evenly coated with thread glue, and is simultaneously compressed against the plastic guide sleeve 15 and the metal guide sleeve 16 to be fixed between the limiting step of the shell 12 and the fixing seat 17.
The dynamic contact system as shown in fig. 3 comprises a push rod 18, an inner insulation bushing 19, a contact ring 20, an outer insulation bushing 21 and a nut 22, wherein the inner insulation bushing 19, the contact ring 20 and the outer insulation bushing 21 sequentially penetrate through the push rod 18, are fixedly arranged on the push rod 18 through the nut 22, and are uniformly coated with thread glue.
The static contact system shown in fig. 4 includes a contact plate 23, rivets 24, a support 25, a conductive plate 26, wherein 4 contact plates 23 are uniformly distributed in a circular shape, and 4 rivets 24 sequentially pass through 4 contact plates 23, a support 25, and the conductive plate 26 and are fixed on the support 25.
The utility model discloses a theory of operation does:
as shown in fig. 6, the circuit form of the switch is 1D (a group of control circuits, which is turned on by pressing), when the travel switch is in a free state, the movable contact system is in a free spring-open state, the pins of the control signal circuits a-b are in an off state, when the push rod of the travel switch is acted by an external force, the movable contact system axially retracts into the shell, and when the retraction stroke reaches 2.5mm ± 1mm, the pins of the control signal circuits a-b are converted from the off state to the on state; the push rod is continuously pressed under the action of external force, the movable contact system continuously retracts axially in the shell, when the retraction stroke reaches the full stroke state and stops (the full stroke is compressed by 6mm +/-1 mm), the stroke switch always outputs one path of connection control signal circuit a-b pins outwards in the process; when the pushing rod is not under the action of external force, the travel switch is quickly reset to the springing-open state under the action of the internal pressure spring, and the pins of the control signal circuit a-b are switched from the on state to the off state.
The above-mentioned embodiments are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, so that the equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A travel switch with high reliable contact comprises an external force transmission mechanism (1), and is characterized in that: the external force transmission mechanism (1) is connected with the static contact system (5), and a cover plate (6) connected with the external force transmission mechanism (1) is sleeved outside the static contact system (5); the external force transmission mechanism (1) comprises a movable contact system (11) and a shell (12) sleeved outside the movable contact system (11), the shell (12) is connected with a cover plate (6), and the movable contact system (11) is connected with a static contact system (5); the movable contact system (11) comprises a push rod (18), a limiting step is arranged on the push rod (18), and an inner insulating bush (19), a contact ring (20) and an outer insulating bush (21) are sequentially sleeved under the limiting step; a plastic guide sleeve (15) and a metal guide sleeve (16) are sequentially sleeved outside the inner insulation bushing (19), the contact ring (20) and the outer insulation bushing (21), and a pressure spring (14) is arranged between the limiting step and the metal guide sleeve (16); the push rod (18) is connected with the shell (12) through a sealing ring (13), and the plastic guide sleeve (15) and the metal guide sleeve (16) are pressed and fixed through a fixing seat (17); the static contact system (5) comprises a supporting seat (25) connected with the bottom of the shell (12), and a lead (7) is welded on the supporting seat (25).
2. The high-reliability contact travel switch of claim 1, wherein: the shell (12) is provided with a plurality of mounting nuts (2) and rotation stopping washers (3) for mounting and locking the switch.
3. The high-reliability contact travel switch of claim 2, wherein: a supporting plate (4) for assisting in mounting and locking the switch is arranged between the rotation stopping washers (3).
4. The high-reliability contact travel switch of claim 1, wherein: the cover plate (6) penetrates through the bottom through a plurality of M2 countersunk head screws (8) and is locked and fixed on the shell (12).
5. The high reliability contact travel switch of claim 1, wherein: and a through hole is formed in the bottom of the cover plate (6), and epoxy resin glue is sealed and filled through the through hole.
6. The high reliability contact travel switch of claim 1, wherein: the inner insulation bushing (19), the contact ring (20) and the outer insulation bushing (21) are fixed on the push rod (18) through nuts (22) and are evenly coated with thread glue.
7. The high reliability contact travel switch of claim 1, wherein: the shell (12) is internally provided with a guide cavity for connecting the push rod (18) and a U-shaped annular groove for installing the sealing ring (13), and lubricating grease is uniformly coated on the sealing ring (13).
8. The travel switch with high reliable contact as claimed in claim 1, characterized in that the fixing seat (17) is screwed on the housing (12) and is evenly coated with thread glue.
9. The high reliability contact travel switch of claim 1, wherein: one end of the lead (7) is welded on the supporting seat (25) through soldering tin, and the rest part is fixed on the shell (12) through an M1.6 countersunk head screw (9) and a line card (10).
10. The high reliability contact travel switch of claim 1, wherein: the upper end face of supporting seat (25) is equipped with a plurality of evenly distributed's contact piece (23), and the lower terminal surface is equipped with conducting strip (26), and contact piece (23) and conducting strip (26) are connected with supporting seat (25) through rivet (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221521258.2U CN217983104U (en) | 2022-06-17 | 2022-06-17 | Travel switch with high-reliability contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221521258.2U CN217983104U (en) | 2022-06-17 | 2022-06-17 | Travel switch with high-reliability contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217983104U true CN217983104U (en) | 2022-12-06 |
Family
ID=84271095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221521258.2U Active CN217983104U (en) | 2022-06-17 | 2022-06-17 | Travel switch with high-reliability contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217983104U (en) |
-
2022
- 2022-06-17 CN CN202221521258.2U patent/CN217983104U/en active Active
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