CN1258925A

CN1258925A - Pressure switch

Info

Publication number: CN1258925A
Application number: CN 99127801
Authority: CN
Inventors: 何建平
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-31
Filing date: 1999-12-31
Publication date: 2000-07-05
Anticipated expiration: 2019-12-31
Also published as: CN1120513C

Abstract

The present invention relates to the technology field of pressure switch. The pressure switch capable of preventing outer vapor and dust from polluting consists of a casing including two, right and left, parts, an elastic membrane and a microswitch. It features a support for microswitch fixed in the left cavity inside the casing and a push bar on the elastic membrane between the two parts of the casing and near to and pointed to the operation side of the microswitch. It is suitable for production and use in industry.

Description

Pressure switch

The present invention relates to a kind of switch, especially the pressure switch technical field of pressure control switch action.

Existing pressure switch, its mainly contain right shell body and left shell and be contained in right shell body and left shell between flexible sheet and sensitive switch form.Its flexible sheet is isolated right shell body and left shell, and sensitive switch is contained in outside the left shell, and flexible sheet can be through sealing after transmission makes the sensitive switch action that is contained in outside the housing, and sensitive switch is moved by the pressure official post motion of membrane between right shell body and the left shell.The more employing sensitive switch of above-mentioned pressure switch because sensitive switch is as a standard component, with the contact on-off ratio than sensitive switch reliability height, and compare with inductive switch, its leakage current can drop to zero.But above-mentioned pressure switch, its sensitive switch is loaded on outside the housing usually, left shell must be opened a hole makes flexible sheet link through push rod and outer sensitive switch, make it can both reliably working in positive differential pressure and Negative Pressure Difference and this hole must isolate in flexible material and chamber, sensitive switch is contained in outside the shell, can be subjected to extraneous steam dust etc. again switch is polluted, thereby influence pressure switch functional reliability and useful life.

The object of the present invention is to provide a kind of simple in structure, use reliable, can avoid extraneous steam contamination by dust to influence the pressure switch of work.

Technical scheme of the present invention is to realize like this.This pressure switch include left shell, right shell body and be contained in left shell and right shell body between flexible sheet and be subjected to the switch of flexible sheet effect, it is characterized in that being provided with support in the left shell chamber, switch is housed on the support, flexible sheet between the housing of the left and right sides is provided with push rod, push rod near and at switch motion face.

This pressure switch is owing to be loaded on switch in the housing, can avoid the pollution of extraneous steam dust, improve its useful life and functional reliability, especially in optimizing embodiment, adopt shape chamber and the isolation diaphragm and the flexible material of division board or installation switch, can further avoid inner steam flow dust, and structure is simple, use is also very convenient the switch pollution effect, be convenient to make, operating pressure also can suitably be adjusted.

Description of drawings:

Fig. 1. pressure switch construction cutaway view 1

Fig. 2. pressure switch construction cutaway view 2

Fig. 3. pressure switch construction cutaway view 3

Below in conjunction with description of drawings inventive embodiment is further described.

Embodiment 1, as shown in Figure 1, this pressure switch includes left shell 1, right shell body 6, flexible sheet 5, sensitive switch 3, push rod 9, spring 8, attachment plug 4, be fixedly connected with flexible sheet between the housing of the left and right sides and housing is divided into left and right sides air chamber, air chamber is taken over by opening can connect extraneous gas circuit, wherein an air chamber also can seal with the external world, be screwed in the left shell chamber simultaneously and be roughly type support 2, be mounted with sensitive switch on the support, its circuit links to each other with attachment plug on the housing, the flexible sheet centre is shaped on push rod, push rod by pilot hole on the support just at the sensitive switch action simultaneously, right shell body has screw for the flexible sheet upper ejector pin, in debug joint screw 7, propping up between the flexible sheet at screw and push rod place has spring 8.

Embodiment 2, and as shown in Figure 2, it changes support into shape chamber that sensitive switch is installed on embodiment 1 basis, and end face is fixed with isolation diaphragm 10 and has the isolation lid of pilot hole.

Embodiment 3, and as shown in Figure 3, it in the left shell chamber, is provided with division board 11 between sensitive switch and push rod on embodiment 1 basis, and division board has the pilot hole that passes through for push rod, and make division board the right, the left side isolated with isolation diaphragm.Also can adopt the rubber flexible material to make division board divides on the left side, the right with sensitive switch, push rod and keeps apart.

Embodiment 4, and it adopts flexible materials such as rubber or plastics to make shell and the switch seal isolation is got up be fixed on the support on embodiment 1 basis.

Switch of the present invention can be key switch, touch-switch, also can adopt sensitive switch, and flexible sheet can be made or two kinds of combinations of materials form with flexible material, and elastic sheet can make one with push rod or combination is made.

Claims

1. pressure switch, its include left shell (1), right shell body (6) and be contained in left shell and right shell body between flexible sheet (5) and be subjected to the switch (3) of flexible sheet effect, it is characterized in that being provided with in the left shell chamber support (2), switch is housed on the support, flexible sheet between the housing of the left and right sides is provided with push rod (9), push rod near and at switch motion face.

2. pressure switch as claimed in claim 1 is characterized in that described support is shaped on the pilot hole that passes through for push rod.

3. pressure switch as claimed in claim 1 or 2 is characterized in that described right shell body has screw corresponding to the push rod position, is equipped with adjustment screw (7) in the screw, and propping up between the flexible sheet at screw and push rod place has spring (8).

4. pressure switch as claimed in claim 1 is characterized in that described support makes the shape chamber that switch is installed, and the shape resonator end surface is fixed with isolation diaphragm (10).

5. pressure switch as claimed in claim 4 is characterized in that stating the shape resonator end surface and also can join the isolation lid that has pilot hole.

6. pressure switch as claimed in claim 1, it is characterized in that the described division board (11) that in the housing chamber, between switch and push rod, is provided with, division board has the pilot hole that passes through for push rod, and adopts the division board that isolation diaphragm makes division board the right, the left side is isolated or adopt flexible material to make that the right, the left side are kept apart.

7. pressure switch as claimed in claim 1 is characterized in that described switch is a sensitive switch.

8. pressure switch as claimed in claim 1 is characterized in that described switch outside employing flexible material seal isolation is fixed on the support again.

9. pressure switch as claimed in claim 8 is characterized in that described flexible material is rubber, plastics.