Mechanical pressure switch

Abstract

This utility model relates to the field of pressure switch technology and discloses a mechanical pressure switch, including a base, an inner liner on the base, and an outer shell connected to the base, all fitted around the inner liner. The base has a first contact foot component and a second contact foot component that cooperate with each other. The contact point of the first contact foot component is located below the second contact foot component. A pressure rod is disposed inside the inner liner, located above the first contact foot component. A dome switch that cooperates with the pressure rod is disposed above the inner liner. This utility model is applicable to a mechanical pressure switch. Through a double-sealing interference structure using waterproof rubber, the upper chamber of the switch is ensured to be airtight and waterproof. The interference fit of the sealing ring prevents external gas and water from entering. Simultaneously, the contact foot position of the switch base is sealed with glue to prevent gas and water from entering through the gap between the contact foot and the base assembly, thus ensuring the airtightness and waterproof performance of the lower chamber of the switch.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch technology, specifically a mechanical 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, short lifespan, and poor waterproofing and airtightness. Utility Model Content

[0003] This invention provides a mechanical pressure switch that solves the problems mentioned in the background art.

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

[0005] A mechanical pressure switch includes a base, an inner liner on the base, an outer shell connected to the base and fitted over the inner liner, a first contact foot component and a second contact foot component that cooperate with each other on the base, the contact point of the first contact foot component being located below the second contact foot component, a pressure rod being provided inside the inner liner and located above the first contact foot component, and a dome switch cooperating with the pressure rod being provided above the inner liner.

[0006] As a preferred embodiment of this utility model, a waterproof rubber is provided between the inner liner and the outer shell, and a sealing ring is provided between the inner liner and the base.

[0007] In a preferred embodiment of this invention, the base is connected to the outer shell by screws.

[0008] As a preferred embodiment of this utility model, the outer shell is a hollow structure.

[0009] The present invention has the following advantages:

[0010] This utility model applies to a mechanical pressure switch. By using waterproof rubber and a double-sealing rib interference structure, the airtightness and waterproof performance of the upper chamber of the switch are ensured. By compressing the sealing ring, external gas and water cannot enter from this point. At the same time, the contact foot of the switch base is sealed with glue to prevent gas and water from entering from the gap between the contact foot and the base assembly. These two points ensure the airtightness and waterproof performance of the lower chamber of the switch. Attached Figure Description

[0011] 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.

[0012] Figure 1 This is a schematic diagram of a mechanical pressure switch.

[0013] Figure 2 This is an exploded view of a mechanical 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. First contact foot component; 9. Second contact foot component; 10. 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 Figure 1 and Figure 2 A mechanical pressure switch includes a base 7, an inner liner 5 on the base 7, and a hollow outer shell 1 connected to the base 7, all fitted over the inner liner 5. The base 7 has a first contact foot component 8 and a second contact foot component 9 that cooperate with each other. The contact point of the first contact foot component 8 is located below the second contact foot component 9. The outer shell 1 is the exposed operating component of the switch, and its exposed length can be varied to meet customer requirements. The inner liner 5 is installed inside the switch. Its upper end is sealed to the outer shell 1 by compression with waterproof rubber 2, and its lower end is connected to the base 7. It contains a sealing ring 6, and the sealing ring 6 is press-fitted to ensure the switch's waterproof and airtight properties. The first contact foot component 8 includes a contact foot, a spring, and a moving contact. One end of the moving contact is installed inside the switch, and the other end is exposed as an output terminal. The second contact foot component 9 includes a contact foot and a stationary contact. One end of the stationary contact is installed inside the switch, and the other end is exposed as an output terminal.

[0017] In one embodiment, a pressure rod 4 is provided inside the inner liner 5, located above the first contact foot component 8. A dome switch 3, which mates with the pressure rod 4, is provided above the inner liner 5. The dome switch 3 is mounted on the switch inner liner 5, pre-pressed with 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 move on the spring of the contact foot component, thereby opening and closing the switch. 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 spring of the first contact foot component 8. Its up-and-down movement causes the spring of the first contact foot component 8 to open and close the two contacts, thus realizing the switching function.

[0018] The upper end of the pressure rod 4 is connected to the dome switch 3 and supported on the contact point of the dome switch 3, while the lower end of the pressure rod 4 is supported on the contact point of the first contact foot component 8. The first contact foot component 8 and the second contact foot component 9 are connected by two contacts. This structure controls the switching force value through a single dome switch 3 and controls the contact pressure between the contacts through a spring. The structure is simple and the switching stability is better. According to the product circuit form, the switch can be confirmed as a single-pole single-throw normally closed switch.

[0019] In one embodiment, a waterproof rubber 2 is provided between the inner liner 5 and the outer shell 1, and a sealing ring 6 is provided between the inner liner 5 and the base 7. The waterproof rubber 2 is a double-sealed soft rib interference structure that fits the outer shell 1 and the inner liner 5 to ensure the airtightness and waterproof function of the upper chamber of the switch. A rubber boss in the middle presses the dome switch 3 through pressure changes to realize the switching function. The sealing ring 6 is made of silicone rubber and is installed between the inner liner 5 and the base 7. The two sides compress the sealing ring 6 to ensure the airtightness and waterproof performance of the lower chamber of the switch.

[0020] In one embodiment, the base 7 is connected to the outer casing 1 by screws 10. The base 7 and the outer casing 1 are fastened together by screws 10. The base 7 houses the first contact foot component 8 and the second contact foot component 9, which are interference-fitted with the inner liner 5 by a sealing ring 6. The outer contact foot positions are sealed with adhesive to achieve switch sealing. Connecting the switch outer casing 1 and the switch base 7 through the screw holes 10 of the base 7 ensures stable, secure, and stronger assembly, preventing the base 7 from detaching or leaking due to high internal pressure. Simultaneously, it ensures the internal rubber is compressed with an interference fit, thus achieving switch protection.

[0021] In this embodiment, when water enters through the hollow pipe above the outer casing 1, it enters the switch through the inlet of the outer casing 1, thereby generating pressure. The water pressure applies pressure to the dome switch 3 through the waterproof rubber 2. When a certain threshold is reached, the dome switch 3 deforms, thereby pressing down the pressure rod 4. The downward movement of the pressure rod 4 drives the spring of the first contact foot component 8 to press down, thereby separating the two contact points and realizing the switch disconnection function. When the pressure decreases, the dome switch 3 deforms and returns to its original position, and the spring in the first contact foot component 8 returns to its original position due to elasticity, thereby driving the pressure rod 4 to move upward, and the two contact points are also connected at the same time, realizing the switch connection function.

[0022] This utility model applies to a mechanical pressure switch. The waterproof rubber 2, through a double-sealing rib interference structure, ensures the airtightness and waterproof performance of the upper chamber of the switch. The compression sealing ring 6 prevents external gas and water from entering from this point. At the same time, the contact foot of the switch base 7 is sealed with glue to prevent gas and water from entering from the gap between the contact foot and the base 7. These two measures ensure the airtightness and waterproof performance of the lower chamber of the switch.

[0023] 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. A mechanical pressure switch, characterized in that, The device includes a base, an inner liner on the base, an outer shell connected to the base, a first contact foot component and a second contact foot component that cooperate with each other on the base, the contact point of the first contact foot component being located below the second contact foot component, a pressure rod being provided inside the inner liner and located above the first contact foot component, and a dome switch that cooperates with the pressure rod being provided above the inner liner.

2. A mechanical pressure switch according to claim 1, characterized in that, A waterproof rubber layer is provided between the inner liner and the outer shell, and a sealing ring is provided between the inner liner and the base.

3. A mechanical pressure switch according to claim 1, characterized in that, The base is connected to the outer casing by screws.

4. A mechanical pressure switch according to claim 1, characterized in that, The outer shell has a hollow structure.

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