Electronic pressure switch

Abstract

The utility model relates to pressure switch technical field discloses an electronic pressure switch, including base, the middle part of base is provided with the circuit board assembly component, the inside lining is sleeved on the base, the pot piece is placed on the inside lining, the waterproof rubber is covered on the pot piece, the middle part of inside lining is penetrated and is connected with the pressure rod, and one end of pressure rod is contacted with the microswitch on the circuit board assembly component, the other end of pressure rod is pasted with the pot piece, the outside of inside lining is sleeved with the shell that cooperates with base. The utility model relates to an electronic pressure switch, adopts waterproof rubber double -way sealing interference, adopts the interference of sealing washer at the lower extreme, uses the glue filling at the bottom, thereby makes the switch to have better sealing performance, and the base is cooperated with the shell through screw, and the switch strength is high, and the assembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch technology, specifically an electronic pressure switch. Background Technology

[0002] Pressure switches are widely used in various fields such as water supply systems, industrial equipment, agricultural irrigation, household appliances, medical devices, and automation control. With technological advancements, the demands for pressure switches across industries are evolving. Currently, most pressure switches on the market suffer from drawbacks such as low current carrying capacity, high cost, complex assembly, low accuracy, and short lifespan. Utility Model Content

[0003] This invention provides an electronic pressure switch that solves the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An electronic pressure switch includes a base, a circuit board assembly in the middle of the base, an inner liner on the base, a dome switch on the inner liner, a waterproof rubber covering the dome switch, a pressure rod penetrating through the middle of the inner liner, one end of the pressure rod contacting a micro switch on the circuit board assembly, the other end of the pressure rod abutting the dome switch, and an outer shell that mates with the base covering the outer side of the inner liner.

[0006] As a preferred embodiment of this utility model, the base is provided with screws that cooperate with the outer shell.

[0007] As a preferred embodiment of this invention, a sealing ring is provided between the liner and the base.

[0008] The present invention has the following advantages:

[0009] This utility model applies to an electronic pressure switch, which adopts a waterproof rubber double-seal interference fit, with a sealing ring interference fit at the lower end and potting at the bottom, thereby giving the switch better sealing performance. The base and the outer shell are connected by screws, resulting in a switch with high strength and easy assembly. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is an exploded view of an electronic pressure switch.

[0012] Figure 2 This is a cross-sectional view of an electronic pressure switch.

[0013] Figure 3 This is a schematic diagram of the circuit features of an electronic pressure switch.

[0014] In the diagram: 1. Outer shell; 2. Waterproof rubber; 3. Dome switch; 4. Pressure rod; 5. Inner liner; 6. Sealing ring; 7. Base; 8. Circuit board assembly; 9. Screw. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In one embodiment, see Figures 1-3 An electronic pressure switch includes a base 7, a circuit board assembly 8 in the middle of the base 7, an inner liner 5 on the base 7, a dome switch 3 on the inner liner 5, and a waterproof rubber 2 covering the dome switch 3. The waterproof rubber 2 is waterproof because the switch housing 1 and the inner liner 5 are fitted together with an interference fit. A rubber boss is provided in the middle to press the dome switch 3 by pressure changes, thereby realizing the switching function. The inner liner 5 is installed inside the switch. Its upper end is sealed to the outer shell 1 by pressing with waterproof rubber 2, and its lower end is connected to the base 7. It also contains a sealing ring 6 to ensure the switch's waterproof and airtightness. The circuit board assembly 8 contains microswitches, resistors, capacitors, and other electronic components, and a wire harness assembly is welded to one side through holes. The circuit board assembly 8 has a MOSFET and a transistor welded on it to output the switch signal. A transistor provides the switching voltage for the high-power MOSFET. A pin assembly provides the connection channel for power input and signal output. Other components are arranged to provide anti-interference capabilities for power and signals, as well as to meet the requirements of large output current.

[0017] In one embodiment, a pressure rod 4 is connected through the middle of the inner liner 5. One end of the pressure rod 4 contacts a micro switch on the circuit board assembly 8, and the other end of the pressure rod 4 is in contact with a dome switch 3. The dome switch 3 is installed on the switch inner liner 5, pre-pressed by a waterproof rubber 2 at the top and connected to the pressure rod 4 at the bottom. Pressure changes cause the waterproof rubber 2 to press the dome switch 3, which in turn presses the pressure rod 4, causing the pressure rod 4 to press the micro switch on the circuit board assembly 8. This results in the switch opening and closing via a circuit signal output. The specifications of the dome switch 3 can be adjusted to meet various pressure requirements. One end of the pressure rod 4 is connected to the dome switch 3, and the other end is connected to the micro switch on the circuit board assembly 8. The up-and-down movement of the pressure rod 4 presses the micro switch on the circuit board assembly 8, thereby outputting a signal to achieve the switching function.

[0018] In one embodiment, the inner liner 5 is fitted with a housing 1 that mates with the base 7. The housing 1 is the exposed operating component of the switch, and its exposed length can be varied to suit customer needs.

[0019] In one embodiment, the base 7 is provided with screws 9 that mate with the outer casing 1. The base 7 and the outer casing 1 are fastened together by the screws 9. The circuit board assembly 8 is installed inside, and the inner lining 5 is press-fitted with the inner lining 6. The outer side has wire harness holes, and the switch sealing performance is achieved by potting glue. The screws 9 connect the switch outer casing 1 and the switch base 7 through the screw holes of the base 7, so that the two are assembled stably and securely.

[0020] In one embodiment, a sealing ring 6 is provided between the inner liner 5 and the base 7. The sealing ring 6 is made of silicone rubber and is installed between the inner liner 5 and the base 7. The two sides ensure the sealing performance of the switch by compressing the sealing ring 6.

[0021] In one embodiment, the upper end of the pressure rod 4 is connected to the dome switch 3 and supported on the dome switch 3, while the lower end of the pressure rod 4 is supported on the circuit board assembly 8. The circuit board assembly 8 is connected. This structure controls the switching force value through a single dome switch 3 and controls the contact pressure between contacts through a spring. The structure is simple and the switching stability is better.

[0022] Switch working principle:

[0023] When water flows into the switch from the inlet of the outer casing 1, pressure is generated. The water pressure is applied to the dome switch 3 through the waterproof rubber 2. When a certain threshold is reached, the dome switch 3 deforms and presses down the pressure rod 4. The downward movement of the pressure rod 4 drives the PCBA of the circuit board assembly 8. The tactile switch SW1 of the PCBA is turned on after being pressed, and a conduction voltage is applied to the base of the transistor (Q2). After the transistor is turned on, it pulls down the control voltage of the MOSFET (Q1). The control electrode of the MOSFET is cut off because there is no voltage. The solenoid valve cannot operate because there is no voltage, and the water inlet valve is closed to ensure that the water pressure in the water tank remains relatively stable.

[0024] This utility model applies to an electronic pressure switch, which uses a waterproof rubber 2 for double-sealed interference fit, a sealing ring 6 for interference fit at the lower end, and potting glue at the bottom, thereby giving the switch better sealing performance. The base 7 and the outer shell 1 are connected by screws 9, resulting in a switch with high strength and easy assembly.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electronic pressure switch characterized by, The device includes a base, a circuit board assembly in the middle of the base, an inner liner on the base, a dome switch on the inner liner, a waterproof rubber covering the dome switch, a pressure rod through the middle of the inner liner, one end of the pressure rod contacting a micro switch on the circuit board assembly, and the other end of the pressure rod fitting against the dome switch, and an outer shell that mates with the base is fitted over the inner liner.

2. An electronic pressure switch according to claim 1, characterized in that The base is provided with screws that mate with the outer shell.

3. An electronic pressure switch according to claim 1, characterized in that A sealing ring is provided between the liner and the base.

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