Double-contact pressure switch

Abstract

The invention discloses a double-contact pressure switch. The double-contact pressure switch comprises a shell; the sensor push rod is telescopically arranged on the shell; the elastic piece comprises an elastic base, a first push rod and a second push rod, the elastic base is connected with the sensor push rod, the first push rod is elastically connected with the elastic base, and the second push rod is elastically connected with the elastic base; the first switch assembly comprises a first switch contact, the second switch assembly comprises a second switch contact, the first switch contact corresponds to the first push rod, the second switch contact corresponds to the second push rod, and the first switch assembly and the second switch assembly are movably arranged on the shell; the first positioning piece is arranged corresponding to the first switch assembly, the second positioning piece is arranged corresponding to the second switch assembly, and the first positioning piece and the second positioning piece are arranged on the shell in a telescopic mode. The beneficial effect of the invention is that high pressure is prevented from directly acting on the first switch assembly to cause damage to the first switch assembly.

Description

Technical Field

[0001] This invention belongs to the field of pressure controller technology, and specifically relates to a dual-contact pressure switch. Background Technology

[0002] Currently, dual-contact pressure switches have a first contact and a second contact. At low pressure, the sensor push rod moves a first displacement, triggering the first contact; at high pressure, the sensor push rod moves a second displacement, triggering the second contact. When the pressure difference between high and low pressure is too large, the displacement difference between the first and second displacements becomes too large, causing damage to the switch assembly corresponding to the first contact. Summary of the Invention

[0003] To address the aforementioned problems, the primary objective of this invention is to provide a dual-contact pressure switch to resolve these technical issues.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] This invention provides a dual-contact pressure switch, comprising:

[0006] Housing; preferably, the housing may comprise two detachably connected upper and lower housing parts.

[0007] Sensor push rod, which is telescopically mounted on the housing;

[0008] The elastic element includes an elastic base, a first push rod, and a second push rod. The elastic base is connected to the sensor push rod, the first push rod is elastically connected to the elastic base, and the second push rod is elastically connected to the elastic base.

[0009] A first switch assembly and a second switch assembly, the first switch assembly including a first switch contact, the second switch assembly including a second switch contact, the first switch contact being correspondingly disposed with a first push rod, the second switch contact being correspondingly disposed with a second push rod, the first switch assembly and the second switch assembly being movably disposed on the housing;

[0010] The first positioning element and the second positioning element are respectively configured to correspond to the first switch assembly and the second positioning element is respectively configured to correspond to the second switch assembly. The first positioning element and the second positioning element are retractably mounted on the housing.

[0011] Among them, the elastic force between the first push rod and the elastic base is greater than the operating force of the first switch contact, and the elastic force between the second push rod and the elastic base is greater than the operating force of the second switch contact.

[0012] The first positioning member is used to limit the first displacement of the first switch assembly, and the second limiting member is used to limit the second displacement of the second switch assembly.

[0013] In one working scenario, when the sensor push rod receives low pressure, it drives the elastic element to abut against the first switch assembly, causing the first switch assembly to move. After moving to a first displacement, the first switch assembly abuts against the first positioning element, and the first push rod drives the first switch contact to move inward, triggering the first switch contact. Specifically, because the elastic force between the first push rod and the elastic base is greater than the operating force of the first switch contact, the first push rod drives the first switch contact to move inward, triggering the first switch contact.

[0014] In another working scenario, when the sensor push rod receives high pressure, it drives the elastic element to move to a first displacement. After the first push rod triggers the first switch contact, the elastic base and the first push rod undergo relative displacement. After the elastic base moves to a second displacement, the second switch assembly abuts against the second positioning element. The second push rod then drives the second switch contact inward, triggering the second switch contact. During the relative displacement between the elastic base and the first push rod, the first switch assembly is subjected to elastic force to prevent high pressure from directly acting on it and causing damage.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: By incorporating an elastic element, when the sensor push rod receives high pressure, the sensor push rod drives the elastic element to move to a first displacement. After the first push rod triggers the first switch contact, a relative displacement occurs between the elastic base and the first push rod, and the first switch assembly is subjected to elastic force, thus preventing high pressure from directly acting on the first switch assembly and causing damage. The longitudinal displacement of the first and second push rods directly acts on the first and second switch contacts, effectively reducing hysteresis.

[0016] Furthermore, the elastic base includes a connecting rod, a first push rod sleeve, and a second push rod sleeve, with the first push rod sleeve and the second push rod sleeve respectively disposed at both ends of the connecting rod;

[0017] The connecting rod connects to the sensor push rod;

[0018] The first push rod is movably embedded in the first push rod sleeve, and the first push rod is elastically connected to the first push rod sleeve.

[0019] The second push rod is movably embedded in the second push rod sleeve, and the second push rod is elastically connected to the second push rod sleeve.

[0020] Furthermore, the first switch assembly includes a first micro switch, and a first switch contact is provided on the side of the first micro switch near the first push rod; the second switch assembly includes a second micro switch, and a second switch contact is provided on the side of the second micro switch near the second push rod.

[0021] Furthermore, the first switch assembly also includes a first slide rail and a first slider. The first slide rail is disposed on the housing, the first slider is movably connected to the first slide rail, and the first micro switch is disposed on the first slider.

[0022] The second switch assembly also includes a second slider and a second slide rail. The second slide rail is disposed on the housing, the second slider is movably connected to the second slide rail, and the second micro switch is disposed on the second slider.

[0023] Preferably, the first and second slide rails can be precision slide rails. By setting the first and second slide rails, accuracy can be improved and backlash reduced.

[0024] Furthermore, the first switch assembly also includes a first mounting base, which is disposed on the first slider.

[0025] The first mounting base has a first mounting position and a first abutting position. The first abutting position is correspondingly set with the first positioning member. A first micro switch is set on the first mounting position. A first through hole is opened on the first mounting position. A first switch contact is set on the first through hole.

[0026] Furthermore, the first mounting position includes a first plate and a second plate arranged vertically, the first plate being correspondingly arranged with the first push rod, and the first plate having a first through hole; the first abutment position includes a first mounting plate.

[0027] Furthermore, the second switch assembly also includes a second mounting base, which is disposed on the second slider.

[0028] The second mounting base has a second mounting position and a second abutment position. The second abutment position is correspondingly set with the second positioning member. A second micro switch is set on the second mounting position. A second through hole is opened on the second mounting position. The second switch contact is set on the second through hole.

[0029] Furthermore, the second mounting position includes a third plate and a fourth plate arranged vertically, the third plate being correspondingly arranged with the second push rod, and the third plate having a second through hole; the second abutment position includes a second mounting plate.

[0030] Furthermore, the first positioning component includes a first adjusting rod and a first connecting plate. The first connecting plate is disposed on the housing, and the first adjusting rod passes through the first connecting plate, being movably connected to the first connecting plate. The spatial position of the first adjusting rod on the first connecting plate can be adjusted to regulate the magnitude of the first displacement.

[0031] Furthermore, the second positioning component includes a second adjusting rod and a second connecting plate. The second connecting plate is disposed on the housing, and the second adjusting rod passes through the second connecting plate, being movably connected to the second connecting plate. The spatial position of the second adjusting rod on the second connecting plate can be adjusted to regulate the magnitude of the second displacement.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: By incorporating an elastic element, when the sensor push rod receives high pressure, the sensor push rod drives the elastic element to move to a first displacement. After the first push rod triggers the first switch contact, a relative displacement occurs between the elastic base and the first push rod, and the first switch assembly is subjected to elastic force, thus preventing high pressure from directly acting on the first switch assembly and causing damage. By incorporating a first slide rail and a second slide rail, accuracy can be improved and hysteresis reduced. The longitudinal displacement of the first push rod and the second push rod directly acts on the first switch contact and the second switch contact, effectively reducing hysteresis. Attached Figure Description

[0033] Figure 1 This is a structural diagram of a two-contact pressure switch.

[0034] Figure 2 This is a structural diagram of the hidden part of a dual-contact pressure switch.

[0035] Figure 3 This is a structural diagram of the hidden part of a dual-contact pressure switch.

[0036] Figure 4 This is a structural diagram of the hidden part of a dual-contact pressure switch.

[0037] Figure 5 This is a structural diagram of the hidden part of a dual-contact pressure switch.

[0038] In the diagram: 1. Housing; 2. Sensor push rod; 3. Elastic element; 33. Elastic base; 31. First push rod; 32. Second push rod; 4. First switch assembly; 5. Second switch assembly; 41. First switch contact; 51. Second switch contact; 6. First positioning element; 7. Second positioning element; 333. Connecting rod; 331. First push rod sleeve; 332. Second push rod sleeve; 42. First micro switch; 52. Second micro switch; 43. First slide rail; 44. First slider; 53. Second slider; 5 4. Second slide rail; 45. First mounting base; 451. First mounting position; 452. First abutment position; 453. First through hole; 454. First plate; 455. Second plate; 456. First mounting plate; 55. Second mounting base; 551. Second mounting position; 552. Second abutment position; 553. Second through hole; 554. Third plate; 555. Fourth plate; 556. Second mounting plate; 61. First adjusting rod; 62. First connecting plate; 71. Second adjusting rod; 72. Second connecting plate. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] To achieve the above objectives, the technical solution of the present invention is as follows:

[0041] See Figures 1-5 As shown, the present invention provides a dual-contact pressure switch, comprising:

[0042] Casing 1;

[0043] Sensor push rod 2, which is telescopically mounted on housing 1;

[0044] The elastic element 3 includes an elastic base 33, a first push rod 31 and a second push rod 32. The elastic base 33 is connected to the sensor push rod 2, the first push rod 31 is elastically connected to the elastic base 33, and the second push rod 32 is elastically connected to the elastic base 33.

[0045] First switch assembly 4 and second switch assembly 5, the first switch assembly 4 includes a first switch contact 41, the second switch assembly 5 includes a second switch contact 51, the first switch contact 41 is correspondingly arranged with the first push rod 31, the second switch contact 51 is correspondingly arranged with the second push rod 32, the first switch assembly 4 and the second switch assembly 5 are movably arranged on the housing 1;

[0046] The first positioning element 6 and the second positioning element 7 are respectively arranged correspondingly to the first switch assembly 4 and the second positioning element 7 is respectively arranged correspondingly to the second switch assembly 5. The first positioning element 6 and the second positioning element 7 are telescopically arranged on the housing 1.

[0047] Among them, the elastic force between the first push rod 31 and the elastic base 33 is greater than the operating force of the first switch contact 41, and the elastic force between the second push rod 32 and the elastic base 33 is greater than the operating force of the second switch contact 51.

[0048] The first positioning member 6 is used to limit the first displacement of the first switch assembly 4, and the second limiting member is used to limit the second displacement of the second switch assembly 5.

[0049] In one working scenario, when the sensor push rod 2 receives low pressure, it drives the elastic element 3 to abut against the first switch assembly 4, thereby causing the first switch assembly 4 to move. After moving to the first displacement, the first switch assembly 4 abuts against the first positioning element 6, and the first push rod 31 drives the first switch contact 41 to move inward, triggering the first switch contact 41. Specifically, because the elastic force between the first push rod 31 and the elastic base 33 is greater than the operating force of the first switch contact 41, the first push rod 31 drives the first switch contact 41 to move inward, triggering the first switch contact 41.

[0050] In another working scenario, when sensor push rod 2 receives high pressure, it drives elastic element 3 to move to a first displacement. After the first push rod 31 triggers the first switch contact 41, the elastic base 33 and the first push rod 31 undergo relative displacement. After the elastic base 33 moves to a second displacement, the second switch assembly 5 abuts against the second positioning element 7. The second push rod 32 drives the second switch contact 51 to move inward, triggering the second switch contact 51. During the relative displacement between the elastic base 33 and the first push rod 31, the first switch assembly 4 is subjected to elastic force to prevent high pressure from directly acting on the first switch assembly 4 and causing damage.

[0051] Compared with the prior art, the beneficial effects of this application are as follows: By setting the elastic element 3, when the sensor push rod 2 receives high pressure, the sensor push rod 2 drives the elastic element 3 to move to the first displacement. After the first push rod 31 triggers the first switch contact 41, the elastic base 33 and the first push rod 31 undergo relative displacement, and the first switch assembly 4 is subjected to elastic force, so as to avoid the high pressure directly acting on the first switch assembly 4 and causing damage to the first switch assembly 4. The longitudinal displacement of the first push rod 31 and the second push rod 32 directly acts on the first switch contact 41 and the second switch contact 51, effectively reducing hysteresis.

[0052] Furthermore, the elastic base 33 includes a connecting rod 333, a first push rod sleeve 331 and a second push rod sleeve 332, with the first push rod sleeve 331 and the second push rod sleeve 332 respectively disposed at both ends of the connecting rod 333;

[0053] Connecting rod 333 connects to sensor push rod 2;

[0054] The first push rod 31 is movably embedded in the first push rod sleeve 331, and the first push rod 31 is elastically connected to the first push rod sleeve 331.

[0055] The second push rod 32 is movably embedded in the second push rod sleeve 332, and the second push rod 32 is elastically connected to the second push rod sleeve 332.

[0056] Furthermore, the first switch assembly 4 includes a first micro switch 42, and a first switch contact 41 is provided on the side of the first micro switch 42 near the first push rod 31; the second switch assembly 5 includes a second micro switch 52, and a second switch contact 51 is provided on the side of the second micro switch 52 near the second push rod 32.

[0057] Furthermore, the first switch assembly 4 also includes a first slide rail 43 and a first slider 44. The first slide rail 43 is disposed on the housing 1, the first slider 44 is movably connected to the first slide rail 43, and the first micro switch 42 is disposed on the first slider 44.

[0058] The second switch assembly 5 also includes a second slider 53 and a second slide rail 54. The second slide rail 54 is disposed on the housing 1. The second slider 53 is movably connected to the second slide rail 54. The second micro switch 52 is disposed on the second slider 53.

[0059] Preferably, the first slide rail 43 and the second slide rail 54 can be precision slide rails. By setting the first slide rail 43 and the second slide rail 54, accuracy can be improved and backlash can be reduced.

[0060] Furthermore, the first switch assembly 4 also includes a first mounting base 45, which is disposed on the first slider 44.

[0061] The first mounting base 45 has a first mounting position 451 and a first abutting position 452. The first abutting position 452 is correspondingly arranged with the first positioning member 6. A first micro switch 42 is provided on the first mounting position 451. A first through hole 453 is opened on the first mounting position 451. A first switch contact 41 is provided on the first through hole 453.

[0062] Furthermore, the first mounting position 451 includes a first plate 454 and a second plate 455 arranged vertically, the first plate 454 is correspondingly arranged with the first push rod 31, and the first plate 454 has a first through hole 453; the first abutment position 452 includes a first mounting plate 456.

[0063] Furthermore, the second switch assembly 5 also includes a second mounting base 55, which is disposed on the second slider 53.

[0064] The second mounting base 55 has a second mounting position 551 and a second abutment position 552. The second abutment position 552 is correspondingly arranged with the second positioning member 7. A second micro switch 52 is provided on the second mounting position 551. A second through hole 553 is opened on the second mounting position 551. A second switch contact 51 is provided on the second through hole 553.

[0065] Furthermore, the second mounting position 551 includes a third plate 554 and a fourth plate 555 arranged vertically. The third plate 554 is correspondingly arranged with the second push rod 32, and the third plate 554 has a second through hole 553. The second abutment position 552 includes a second mounting plate 556.

[0066] Furthermore, the first positioning component 6 includes a first adjusting rod 61 and a first connecting plate 62. The first connecting plate 62 is disposed on the housing 1, and the first adjusting rod 61 passes through the first connecting plate 62, and the first adjusting rod 61 is movably connected to the first connecting plate 62. The spatial position of the first adjusting rod 61 on the first connecting plate 62 can be adjusted to regulate the magnitude of the first displacement.

[0067] Furthermore, the second positioning member 7 includes a second adjusting rod 71 and a second connecting plate 72. The second connecting plate 72 is disposed on the housing 1, and the second adjusting rod 71 passes through the second connecting plate 72, and the second adjusting rod 71 is movably connected to the second connecting plate 72. The spatial position of the second adjusting rod 71 on the second connecting plate 72 can be adjusted to regulate the magnitude of the second displacement.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-contact pressure switch, characterized by The utility model relates to a sensor push rod, a shell, an elastic member, a first switch assembly and a second switch assembly, a first positioning piece and a second positioning piece are provided. The elastic base comprises a connecting rod, a first push rod sleeve and a second push rod sleeve, the first push rod sleeve and the second push rod sleeve are arranged at two ends of the connecting rod respectively; The connecting rod is connected with the sensor push rod; The first push rod is movably embedded on the first push rod sleeve, and the first push rod is elastically connected with the first push rod sleeve; The second push rod is movably embedded on the second push rod sleeve, and the second push rod is elastically connected with the second push rod sleeve. The first switch assembly comprises a first micro switch, and the first micro switch is provided with a first switch contact on the side close to the first push rod; the second switch assembly comprises a second micro switch, and the second micro switch is provided with a second switch contact on the side close to the second push rod.

2. The dual contact pressure switch of claim 1, wherein The first switch assembly further comprises a first sliding rail and a first sliding block, the first sliding rail is arranged on the shell, the first sliding block is movably connected with the first sliding rail, and the first micro switch is arranged on the first sliding block; The second switch assembly further comprises a second sliding block and a second sliding rail, the second sliding rail is arranged on the shell, the second sliding block is movably connected with the second sliding rail, and the second micro switch is arranged on the second sliding block. The first switch assembly further comprises a first mounting seat, the first mounting seat is arranged on the first sliding block, The first mounting seat is formed with a first mounting position and a first abutting position, the first abutting position is arranged corresponding to the first positioning piece, the first micro switch is arranged on the first mounting position, a first through hole is formed on the first mounting position, and the first switch contact is arranged on the first through hole.

3. The dual contact pressure switch of claim 1 wherein, The first mounting position comprises a first plate body and a second plate body arranged vertically, the first plate body is arranged corresponding to the first push rod, and the first plate body is formed with the first through hole; the first abutting position comprises a first mounting plate.

4. The dual contact pressure switch of claim 3, wherein The second switch assembly further comprises a second mounting seat, the second mounting seat is arranged on the second sliding block, The second mounting seat is formed with a second mounting position and a second abutting position, the second abutting position is arranged corresponding to the second positioning piece, the second micro switch is arranged on the second mounting position, a second through hole is formed on the second mounting position, and the second switch contact is arranged on the second through hole.

5. The dual contact pressure switch of claim 4 wherein, The second mounting position comprises a third plate body and a fourth plate body arranged vertically, the third plate body is arranged corresponding to the second push rod, and the third plate body is formed with the second through hole; the second abutting position comprises a second mounting plate. The first positioning piece comprises a first adjusting rod and a first connecting plate, the first connecting plate is arranged on the shell, the first adjusting rod penetrates through the first connecting plate, and the first adjusting rod is movably connected with the first connecting plate.

6. The dual contact pressure switch of claim 5 wherein, ​ 7. The dual contact pressure switch of claim 4 wherein, ​ ​ 8. The dual contact pressure switch of claim 7 wherein, ​ 9. The dual contact pressure switch of claim 1 wherein, ​ 10. The dual contact pressure switch of claim 1 wherein, The second positioning member comprises a second adjusting rod and a second connecting plate, the second connecting plate is arranged on the shell, and the second adjusting rod passes through the second connecting plate and is movably connected with the second connecting plate.

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