Pressure switch with protection function

Abstract

The utility model discloses a pressure switch with a protection function, which comprises a switch cap and a limiting piece, one end of the limiting piece is provided with a protection shell, one end of the protection shell is provided with a dustproof film, at least one microswitch is arranged in the protection shell, a key of the microswitch is abutted against the dustproof film, and the key of the microswitch is connected with the dustproof film. A locking cap is arranged at the other end of the protective shell, and an O-shaped sealing ring is arranged between the locking cap and the protective shell. Water, dust and greasy dirt are prevented from entering the microswitch through the dustproof film, a sealed space is formed in the protective shell through the locking cap and the O-shaped sealing ring, water is prevented from entering the protective shell, the microswitch is effectively protected against water erosion, the product has a protection function, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure switch technical field especially relates to a pressure switch with protection function. BACKGROUND

[0002] The main role of pressure switch is detection, display, alarm and control signal output, ensure normal operation of system. Through built-in high-precision sensor, pressure switch can compensate pressure and liquid level signal, realize accurate measurement and control to medium pressure signal. It is widely used in chemical industry, machinery, hydrology, electric power, environmental protection and other fields, is used for measuring and controlling pressure of gas, liquid.

[0003] The existing pressure switch is equipped with multiple microswitches, when the pressure switch is in humid environment, moisture will enter the inside of the pressure switch, causes the contact surface to generate insulating covering film layer, thereby influences the sensitivity and normal work of microswitch, therefore, the applicant has made beneficial design, found the method for solving above -mentioned problem, the technical scheme to be introduced below is produced under this background. SUMMARY

[0004] The utility model discloses a kind of pressure switches with protection function, improve service life of product, to overcome the deficiency of the design of above-mentioned traditional pressure switch.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A kind of pressure switch with protection function, including switch cap, limiting piece, the one end of the limiting piece is equipped with protective shell, the one end of the protective shell is equipped with dustproof film, at least one microswitch is equipped in the protective shell, the button of the microswitch is in abutment with dustproof film, the other end of the protective shell is equipped with locking cap, O type sealing ring is equipped between the locking cap and protective shell.

[0007] Preferably, the switch cap is equipped with support, the two sides of the support are equipped with abutting portion, and the end face of the abutting portion is equipped with gasket between the switch cap.

[0008] Preferably, the limiting piece is equipped with cavity, and the one end of the cavity is equipped with screw hole for accommodating protective shell.

[0009] Preferably, the other end of the cavity is equipped with blind hole, the blind hole is equipped with liftable top ring, spring is equipped between the top ring and support, the top ring is equipped with trigger rod and is located below dustproof film, and the two sides of the cavity are equipped with through hole for abutting portion to pass through.

[0010] Preferably, the protective shell is equipped with recess for accommodating microswitch, and the protective shell is further equipped with counterbore, and the counterbore is equipped with thread groove.

[0011] Preferably, the locking cap is provided with a rubber column, and the rubber column is provided with a plurality of threading holes.

[0012] Preferably, the limiting piece is threadedly connected to the switch cap, the protective shell is threadedly connected to the threaded hole, the locking cap is threadedly connected to the threaded groove, and the O-shaped sealing ring is arranged between the locking cap and the counterbore.

[0013] Beneficial effects:

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses, through dustproof membrane prevents water, dust, oil stain from entering into microswitch, through locking cap and O-shaped sealing ring, make the sealed space in protective shell, prevent water from entering into protective shell, effectively protect microswitch from water erosion, make product have the advantages such as protection function, improve the life. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the side surface section structure schematic diagram of a pressure switch with protection function of the utility model;

[0017] Figure 2 It is the side surface section structure schematic diagram of a pressure switch with protection function of the utility model; Figure 1

[0018] Figure 3 It is the side surface section structure schematic diagram of a pressure switch with protection function of the utility model;

[0019] The corresponding relationship between the annotations of the drawings and the component names in the drawings is as follows:

[0020] Corresponding relationship between the annotations of the drawings and the component names in the drawings is as follows: Specific embodiments

[0021] The technical solutions of the utility model will be described clearly and completely below in combination with embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] ​In the description of the utility model, it is understood that the directions or position relations indicated by the terms such as ''upper'', ''lower'', ''left'', ''right'' in the specification are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] In the embodiments of the utility model, ''and / or'' is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously, and B exists alone.

[0024] Reference example Figures 1 to 3 A pressure switch with protection function, including switch cap 1, limiting piece 2, one end of limiting piece 2 is equipped with protective shell 3, one end of protective shell is equipped with dustproof film 4, at least one microswitch 5 is equipped in protective shell 3, the button of microswitch 5 is abutted to dustproof film 4, the other end of protective shell is equipped with locking cap 6, O-shaped sealing ring 7 is equipped between locking cap 6 and protective shell 3, water, dust, dirt is prevented to enter into microswitch 5 by dustproof film 4, the sealed space is formed in protective shell 3 by locking cap 6 and O-shaped sealing ring 7, water is prevented to enter into protective shell 3, effectively protect microswitch 5 from water erosion, guarantee the normal operation of microswitch 5;

[0025] It is worth mentioning that the supporting piece 8 is arranged in the switch cap 1, the abutting portions 81 are arranged on the two sides of the supporting piece 8, the gaskets 82 are arranged between the end faces of the abutting portions 81 and the switch cap 1, the supporting piece 8 provides support for the spring 91, the switch cap 1 provides support for the abutting portions 81, and the gaskets 82 prevent noise from being generated between the abutting portions 81 and the switch cap 1.

[0026] It is worth mentioning that the limiting piece 2 is provided with a cavity 21, one end of the cavity 21 is provided with a threaded hole 22 for accommodating the protective shell 3, and the cavity 21 provides accommodation spaces for the top ring 9, the supporting piece 8 and the spring 91.

[0027] It is worth mentioning that the other end of the cavity 21 is provided with a blind hole 23, the blind hole 23 is provided with a liftable top ring 9, the spring 91 is arranged between the top ring 9 and the supporting piece 8, the top ring 9 is provided with a trigger rod 92 and is located below the dustproof film 4, the through holes 24 for the abutting portions 81 to pass through are arranged on the two sides of the cavity 21, when the threshold pressure in the pipe body is reached, the top ring 9 is pushed to move upward and press the spring 91 to store energy, the trigger rod 92 pushes the dustproof film 4 to retract and triggers the button of the microswitch 5, so that the microswitch 5 is turned on.

[0028] It is worth mentioning that the protective shell 3 is provided with a recess 31 accommodating the micro switch 5, and the protective shell 3 is further provided with a counterbore 32 provided with a threaded groove 33, so that the overall volume of the combination of the protective shell 3, the locking cap 6 and the dustproof film 4 is reduced, and too much space is not occupied;

[0029] It is worth mentioning that the locking cap 6 is provided with a rubber column 61 provided with a plurality of wire insertion holes 62 through which the wires are inserted for electrical connection with external equipment, so that the wires are closely fitted with the wire insertion holes 62, the gap is reduced, and water is prevented from entering the micro switch 5;

[0030] It is worth mentioning that the limiting piece 2 is threadedly connected to the switch cap 1, the protective shell 3 is threadedly connected to the threaded hole 22, the locking cap 6 is threadedly connected to the threaded groove 33, and the O-shaped sealing ring 7 is arranged between the locking cap 6 and the counterbore 32, so that the sealing property between the locking cap 6 and the counterbore 32 is increased, and the sealing property is further improved.

[0031] The above design scheme can make the product have the advantages of protection function and improved service life.

[0032] The above content is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all of them should be regarded as belonging to the protection range determined by the claims of the utility model.

Claims

1. A pressure switch with a protection function, comprising a switch cap (1), a limiting member (2), characterized in that: One end of the limiting piece (2) is provided with a protective shell (3), one end of the protective shell is provided with a dustproof film (4), at least one micro switch (5) is arranged in the protective shell (3), the key of the micro switch (5) abuts against the dustproof film (4), the other end of the protective shell is provided with a locking cap (6), and an O-shaped sealing ring (7) is arranged between the locking cap (6) and the protective shell (3).

2. The pressure switch with protection function according to claim 1, characterized in that: The switch cap (1) is provided with a supporting piece (8), both sides of the supporting piece (8) are provided with abutting portions (81), and a gasket (82) is arranged between the end face of the abutting portion (81) and the switch cap (1).

3. The pressure switch with protection function according to claim 2, characterized in that: The limiting piece (2) is provided with a cavity (21), one end of the cavity (21) is provided with a threaded hole (22) for accommodating the protective shell (3).

4. The pressure switch with protection function according to claim 3, characterized in that: The other end of the cavity (21) is provided with a blind hole (23), the blind hole (23) is provided with a liftable top ring (9), a spring (91) is arranged between the top ring (9) and the supporting piece (8), the top ring (9) is provided with a trigger rod (92) and is located below the dustproof film (4), and both sides of the cavity (21) are provided with through holes (24) for the abutting portions (81) to pass through.

5. The pressure switch with protection function according to claim 4, characterized in that: The protective shell (3) is provided with a recess (31) for accommodating the micro switch (5), and the protective shell (3) is also provided with a counterbore (32) provided with a threaded groove (33).

6. The pressure switch with protection function according to claim 5, characterized in that: The locking cap (6) is provided with a rubber column (61) provided with a plurality of wire holes (62).

7. The pressure switch with protection function according to claim 5, characterized in that: The limiting piece (2) is threadedly connected to the switch cap (1), the protective shell (3) is threadedly connected to the threaded hole (22), the locking cap (6) is threadedly connected to the threaded groove (33), and the O-shaped sealing ring (7) is arranged between the locking cap (6) and the counterbore.

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