CN213340211U

CN213340211U - Miniature pressure switch

Info

Publication number: CN213340211U
Application number: CN202022391093.9U
Authority: CN
Inventors: 王星照; 佟勇华
Original assignee: Ningbo Zhaohua Environmental Protection Technology Co ltd
Current assignee: Ningbo Zhaohua Environmental Protection Technology Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-06-01
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses a miniature pressure switch, which belongs to the switch field and comprises a shell, a diaphragm, a spring piece, a mandril and a switch structure; a cavity is arranged in the shell, a water guide channel is drilled at the upper end of the shell and is communicated with the cavity; the diaphragm is arranged in the cavity and is arranged on the shell; the spring piece is arranged below the diaphragm, and one side of the spring piece facing the diaphragm is arched; the ejector rod is inserted in the shell and also comprises a wear-resistant gasket, and the wear-resistant gasket is padded between the lower part of the outer edge of the spring piece and the bottom wall of the cavity; the ejector rod is inserted into the inner side of the wear-resistant washer, the wear-resistant washer is assembled below the spring piece and made of hard metal, and compared with direct contact abrasion between the spring piece and the bottom wall of the cavity, the wear-resistant washer is used for separating the spring piece from the bottom wall of the cavity, so that the abrasion is greatly reduced, and the service life of the spring piece is effectively prolonged.

Description

Miniature pressure switch

Technical Field

The utility model relates to a switch field, more specifically say, relate to a miniature pressure switch.

Background

The patent No. CN208596642U discloses a pressure switch, which comprises a shell and a switch support, wherein the shell comprises an upper shell and a lower shell, the switch support is provided with a static inserting sheet and a dynamic inserting sheet, the switch support is arranged on the lower shell, the static inserting sheet and the dynamic inserting sheet respectively penetrate out from one end of the lower shell far away from the upper shell, the static inserting sheet is provided with a static contact, the dynamic inserting sheet is provided with an elastic moving contact, the elastic moving contact is positioned at one side of the static contact far away from the upper shell, the elastic moving contact is contacted with the static contact when not being subjected to external force, the lower shell is provided with an ejector rod capable of sliding, the end part of the ejector rod corresponds to the elastic moving contact, one end of the lower shell close to the upper shell is provided with a transient trip spring sheet arched towards the upper shell, the transient spring sheet is in contact fit with one, the method is characterized in that: the upper shell and the lower shell are in screwed connection and matching through threads, the upper shell and the lower shell are in sealed matching through the diaphragm, the upper shell is provided with an accommodating cavity communicated with the water inlet, the diaphragm is arranged in the accommodating cavity, the lower shell can press the diaphragm on the bottom surface of the accommodating cavity, the diaphragm is pressed and deformed to press the instantaneous spring piece, and the instantaneous spring piece can drive the ejector rod to move to one side close to the elastic moving contact.

In above-mentioned patent, when the transient jump spring leaf was out of shape because of water impact many times, spring leaf bottom outer lane directly supported the pressure with holding intracavity diapire, and the spring leaf is very easily damaged until losing effect because of wearing and tearing attenuation to lead to whole switch all to be unable to use.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a miniature pressure switch.

In order to solve the above problems, the utility model adopts the following technical proposal.

A micro pressure switch comprises a shell, a diaphragm, a spring piece, a top rod and a switch structure; a cavity is arranged in the shell, a water guide channel is drilled at the upper end of the shell and is communicated with the cavity; the diaphragm is arranged in the cavity and is arranged on the shell; the spring piece is arranged below the diaphragm, and one side of the spring piece facing the diaphragm is arched; the push rod is inserted in the shell, the upper end of the push rod extends into the cavity to be contacted with the middle part of the spring piece, the lower end of the push rod extends into the switch structure, and the push rod can move up and down to trigger the switch structure to be closed or opened; the switch structure is arranged at the lower end of the shell and also comprises a wear-resistant gasket, and the wear-resistant gasket is arranged between the lower part of the outer edge of the spring piece and the bottom wall of the cavity; the ejector pin is inserted inside the wear-resistant washer.

Furthermore, the cavity is cylindrical, and the peripheral side of the wear-resistant gasket is tightly matched on the inner side wall of the cylindrical cavity.

Further, the outer diameter of the spring piece is not larger than that of the wear-resistant washer.

Further, the outer diameter of the spring piece is 85% -100% of the outer diameter of the wear-resistant washer.

Further, the wear-resistant gasket is made of hard metal materials.

Further, the casing includes casing and lower casing, the cavity is formed by last casing and lower casing threaded connection, and the diaphragm is located between last casing and the lower casing, and the diaphragm outermost circle upper and lower side is by last casing and lower casing elasticity extrusion respectively.

Further, the switch structure includes installing support, quiet inserted sheet and moves the inserted sheet, and the middle part forms the action chamber after installing support and casing are connected, and the lower extreme of quiet inserted sheet and moving the inserted sheet all runs through that installing support extends the downside of installing support, upper end to extend the action intracavity and stack from top to bottom and distribute, and the ejector pin contacts with a side that moves the inserted sheet and is close to the casing.

Furthermore, the static inserting sheet and the movable inserting sheet are fixed with the mounting bracket in an insert injection molding or resin sealing mode.

Compared with the prior art, the utility model has the advantages of:

this scheme is at the wear-resisting packing ring of spring leaf below assembly, and wear-resisting packing ring adopts the carbide to make, compares in the direct contact wearing and tearing between spring leaf and chamber bottom wall, separates through wear-resisting packing ring, and wearing and tearing greatly reduced to effectively prolong the life of spring leaf.

Drawings

FIG. 1 is a perspective view of the front structure of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

fig. 3 is a schematic structural diagram of a in fig. 2.

The reference numbers in the figures illustrate:

the device comprises a shell 1, a water guide channel a, a cavity b, an upper shell 11, a lower shell 12, a diaphragm 2, a spring piece 3, a push rod 4, a switch structure 5, a mounting bracket 51, a static insertion piece 52, a dynamic insertion piece 53, an elastic snap ring 54 and a wear-resistant gasket 6.

Detailed Description

The technical scheme in the embodiment of the utility model is clearly and completely described; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

Example 1:

referring to fig. 1-3, a micro pressure switch includes a housing 1, a diaphragm 2, a spring plate 3, a push rod 4 and a switch structure 5; a cavity b is formed in the shell 1, a water guide channel a is formed in the upper end of the shell 1 in a chiseled mode, and the water guide channel a is communicated with the cavity b; the diaphragm 2 is arranged in the cavity b, and the diaphragm 2 is arranged on the shell 1; the spring piece 3 is arranged below the diaphragm 2, and the spring piece 3 arches towards one side of the diaphragm 2; the ejector rod 4 is inserted in the shell 1, the upper end of the ejector rod 4 extends into the cavity b to be contacted with the middle part of the spring piece 3, the lower end of the ejector rod 4 extends into the switch structure 5, and the up-and-down movement of the ejector rod 4 can trigger the switch structure 5 to be closed or opened; the switch structure 5 is arranged at the lower end of the shell 1 and also comprises a wear-resistant gasket 6, and the wear-resistant gasket 6 is padded between the lower part of the outer edge of the spring piece 3 and the bottom wall of the cavity b; the ejector rod 4 is inserted inside the wear-resistant washer 6.

Referring to fig. 2, the cavity b is cylindrical, the wear-resistant washer 6 is made of hard metal material, the outer periphery of the wear-resistant washer 6 is tightly fitted on the inner side wall of the cylindrical cavity b, the outer diameter of the wear-resistant washer 6 is equal to or slightly larger than the inner diameter of the cavity b, compared with the prior art, the spring plate 3 is not directly pressed against the bottom wall of the cavity b, but indirectly pressed against the bottom wall of the cavity b through the wear-resistant washer 6, and the wear caused by the spring plate 3 is greatly reduced.

Referring to fig. 3, the outer diameter of the spring plate 3 is equal to or slightly smaller than the outer diameter of the wear-resistant washer 6, that is, the outer diameter of the spring plate 3 is not larger than the outer diameter of the wear-resistant washer 6, and further, the outer diameter of the spring plate 3 is 85% -100% of the outer diameter of the wear-resistant washer 6, so that the direct contact force between the spring plate 3 and the cavity wall of the cavity b is small or zero, and the spring plate 3 is not easily worn.

Referring to fig. 1-3, the housing 1 includes an upper housing 11 and a lower housing 12, the cavity b is formed by screwing the upper housing 11 and the lower housing 12, the diaphragm 2 is located between the upper housing 11 and the lower housing 12, and the upper and lower sides of the outermost layer of the diaphragm 2 are elastically pressed by the upper housing 11 and the lower housing 12, respectively; the switch structure 5 comprises a mounting bracket 51, a static inserting sheet 52 and a movable inserting sheet 53, the middle part of the mounting bracket 51 is connected with the shell 1 to form an action cavity, the lower ends of the static inserting sheet 52 and the movable inserting sheet 53 penetrate through the mounting bracket 51 to extend to the lower side of the mounting bracket 51, the upper ends of the static inserting sheet 52 and the movable inserting sheet 53 extend into the action cavity and are vertically overlapped and distributed, and the ejector rod 4 is contacted with one side surface of the movable inserting sheet 53, which is close; the static inserting sheet 52 and the movable inserting sheet 53 are fixed with the mounting bracket 51 by insert injection or resin sealing.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. A micro pressure switch comprises a shell (1), a diaphragm (2), a spring piece (3), a top rod (4) and a switch structure (5); a cavity (b) is arranged in the shell (1), a water guide channel (a) is arranged at the upper end of the shell (1) in a chiseled mode, and the water guide channel (a) is communicated with the cavity (b); the diaphragm (2) is arranged in the cavity (b), and the diaphragm (2) is arranged on the shell (1); the spring piece (3) is arranged below the diaphragm (2), and the spring piece (3) arches towards one side of the diaphragm (2); the ejector rod (4) is inserted in the shell (1), the upper end of the ejector rod (4) extends into the cavity (b) to be contacted with the middle part of the spring piece (3), the lower end of the ejector rod (4) extends into the switch structure (5), and the ejector rod (4) can move up and down to trigger the switch structure (5) to be closed or opened; switch structure (5) are installed at casing (1) lower extreme, its characterized in that: the spring piece is characterized by further comprising a wear-resistant gasket (6), wherein the wear-resistant gasket (6) is padded between the lower part of the outer edge of the spring piece (3) and the bottom wall of the cavity (b); the ejector rod (4) is inserted inside the wear-resistant washer (6).

2. The miniature pressure switch of claim 1, wherein: the cavity (b) is cylindrical, and the peripheral side of the wear-resistant gasket (6) is tightly matched on the inner side wall of the cylindrical cavity (b).

3. The miniature pressure switch of claim 1, wherein: the outer diameter of the spring piece (3) is not larger than that of the wear-resistant washer (6).

4. The miniature pressure switch of claim 1, wherein: the outer diameter of the spring piece (3) is 85% -100% of the outer diameter of the wear-resistant washer (6).

5. The miniature pressure switch of claim 1, wherein: the wear-resistant gasket (6) is made of hard metal materials.

6. The miniature pressure switch of claim 1, wherein: casing (1) includes casing (11) and casing (12) down, cavity (b) are formed by last casing (11) and casing (12) threaded connection down, and diaphragm (2) are located between last casing (11) and casing (12) down, and diaphragm (2) outermost circle upper and lower side is by last casing (11) and casing (12) elasticity extrusion down respectively.

7. The miniature pressure switch of claim 1, wherein: switch structure (5) include installing support (51), quiet inserted sheet (52) and move inserted sheet (53), and the middle part forms the action chamber after installing support (51) is connected with casing (1), and quiet inserted sheet (52) all run through installing support (51) and extend the downside of installing support (51), the upper end extends to and moves the intracavity and superpose from top to bottom and distribute with the lower extreme that moves inserted sheet (53), ejector pin (4) with move a side contact that inserted sheet (53) are close to casing (1).

8. The miniature pressure switch of claim 7, wherein: an elastic clamping ring (54) is arranged between the mounting bracket (51) and the shell (1), and the mounting bracket (51) is elastically abutted against the shell (1) by the elastic clamping ring (54).

9. The miniature pressure switch of claim 7, wherein: the static inserting sheet (52) and the movable inserting sheet (53) are fixed with the mounting bracket (51) in an insert injection molding or resin sealing mode.