Pressure switch comprising diaphragm

Abstract

The utility model discloses a pressure switch comprising a diaphragm, which comprises a casing and a transmission mechanism, an air cavity is formed in the casing, a diaphragm piece is arranged at the bottom of the air cavity, and the transmission mechanism is arranged below the diaphragm piece. The transmission mechanism comprises a fixed plate, a movable plate is transversely arranged on the fixed plate, a retention column is vertically arranged at one end of the movable plate and sleeved with a connecting ring, one end of the connecting ring is in contact connection with the diaphragm piece, the other end of the connecting ring is connected with a movable ring through a connecting rod, and the positioning column is sleeved with the movable ring; a balance plate is connected to the movable plate, ejector rods are symmetrically arranged on the top face of the balance plate, and microswitches are arranged above the ejector rods. According to the utility model, the diaphragm sheet is driven by air pressure in the air cavity to deform so as to form a pushing force, and the ejector rod is ejected by the transmission mechanism, so that the microswitch is triggered by the ejector rod, the sensitivity during triggering is improved, errors are avoided, and the sensing precision of the pressure switch is further improved.

Description

Technical Field

[0001] The utility model relates to a pressure switch, in particular to a pressure switch comprising a diaphragm. Background Art

[0002] The pressure switch uses a high-precision, high-stability pressure sensor and transmission circuit, and then uses a dedicated CPU modular signal processing technology to detect, display, alarm and control signal output of the medium pressure signal. However, in the actual application of existing pressure switches, there are still the following shortcomings: the trigger is not sensitive enough, it is easy to make mistakes, resulting in low sensing accuracy. Utility Model Content

[0003] In order to solve the deficiencies of the above-mentioned technology, the utility model provides a pressure switch including a diaphragm.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure switch including a diaphragm, including a housing, and also including a transmission mechanism, an air cavity is formed in the housing, a diaphragm is provided at the bottom of the air cavity, and a transmission mechanism is provided below the diaphragm;

[0005] The transmission mechanism comprises a fixed plate, a movable plate is horizontally arranged on the fixed plate, a retaining column is vertically arranged at one end of the movable plate, a connecting ring is arranged outside the retaining column, one end of the connecting ring is in contact with the diaphragm, and the other end is connected to the moving ring through a connecting rod, and the moving ring is sleeved outside the positioning column;

[0006] The movable plate is connected with a balance plate, a top surface of the balance plate is symmetrically provided with a push rod, and a micro switch is arranged above the push rod.

[0007] Preferably, a pressing block in contact with the connecting ring is fixedly provided on the diaphragm, and the free end of the pressing block is tapered.

[0008] Preferably, the positioning column is vertically arranged on the fixing plate, and its center is located on the same vertical line as the center of the fixing column.

[0009] Preferably, the movable plate is rotatably connected to the fixed plate via a rotating shaft, and the rotating shaft passes through the fixed plate and is fixedly connected to the balancing plate.

[0010] Preferably, the free end of the push rod is an arc-shaped end.

[0011] Preferably, a No. 1 column is arranged on the movable plate between the connecting ring and the rotating shaft, an extension plate is arranged on one side of the movable ring, and a No. 2 column cooperating with the No. 1 column is arranged on the extension plate.

[0012] Preferably, a spring is connected between the first column and the second column.

[0013] The utility model generates a driving force by driving the diaphragm to deform through the air pressure in the air cavity, and lifts the push rod through the transmission mechanism, so that the push rod triggers the micro switch, thereby improving the sensitivity when triggering, avoiding errors, and further improving the sensing accuracy of the pressure switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] In the figure: 1. casing; 2. transmission mechanism; 3. air cavity; 4. diaphragm; 5. retaining column; 6. positioning column; 7. pressure block; 8. micro switch; 9. spring; 10. column No. 1; 11. column No. 2; 21. fixed plate; 22. movable plate; 23. connecting ring; 24. moving ring; 25. balance plate; 26. rotating shaft; 27. push rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] like Figure 1 A pressure switch including a diaphragm is shown, including a casing 1, and also includes a transmission mechanism 2. An air cavity 3 is formed in the casing 1, a diaphragm 4 is provided at the bottom of the air cavity 3, and a transmission mechanism 2 is provided below the diaphragm 4; by setting the transmission mechanism, when the diaphragm is deformed, the transmission mechanism drives the push rod to move upward, thereby realizing that the push rod triggers the micro switch.

[0019] In one embodiment, the transmission mechanism 2 includes a fixed plate 21, on which a movable plate 22 is transversely provided, a retaining column 5 is vertically provided at one end of the movable plate 22, a connecting ring 23 is disposed on the outer sleeve of the retaining column 5, one end of the connecting ring 23 is in contact with the diaphragm, and the other end is connected to a moving ring 24 through a connecting rod, and the moving ring 24 is disposed outside the positioning column 6; the connecting ring and the moving ring provide a space for movement, and displacement occurs along the space.

[0020] Specifically, the movable plate 22 is connected to a balance plate 25, and a push rod 27 is symmetrically arranged on the top surface of the balance plate 25 (the push rod on the other side is not shown in the figure), and the free end of the push rod 27 is an arc-shaped end to improve the sensitivity of the touch. A micro switch 8 is arranged above the push rod 27. The balance plate is pried by the deformation of the diaphragm, and the push rod is lifted up by the tilting of the balance plate, thereby triggering the micro switch.

[0021] The working process of the transmission mechanism is as follows: gas enters the air cavity from the air inlet of the casing. When the air pressure in the air cavity exerts pressure on the diaphragm that exceeds the supporting force of the connecting ring, the diaphragm will be deformed and concave. At this time, the pressure block on the diaphragm will exert a downward force on the connecting ring, causing the connecting ring to move downward. At this time, the connecting ring drives one end of the movable plate to move downward, and at the same time drives the movable ring to move downward. Since the movable plate is connected to the fixed plate through a rotating shaft, therefore, in the process of the movable plate following the connecting ring to move downward, the balance plate fixed to the rotating shaft also moves with the rotating shaft, causing one end of the balance plate to tilt upward, and the tilted end will drive the push rod to move upward until the push rod touches the micro switch.

[0022] Preferably, a pressure block 7 in contact with the connecting ring is fixed on the diaphragm 4, and the free end of the pressure block 7 is tapered to improve the sensitivity of the touch. The pressure block transmits the deformation of the diaphragm to the connecting ring, so that the connecting ring moves, thereby further prying the balance plate.

[0023] Preferably, the positioning column 6 is vertically arranged on the fixed plate, and its center is located on the same vertical line as the center of the fixed column. The moving path of the transmission mechanism is ensured by the positioning column and the fixed column, thereby ensuring that the push rod can accurately touch the micro switch.

[0024] Preferably, the movable plate 22 is rotatably connected to the fixed plate via a rotating shaft 26, and the rotating shaft 26 passes through the fixed plate and is fixedly connected to the balancing plate. The balancing plate can be easily pried by the transmission mechanism by providing the rotating shaft.

[0025] Preferably, a first column 10 is arranged on the movable plate 22 between the connecting ring 23 and the rotating shaft 26, and an extension plate is arranged on one side of the movable ring 24, and a second column 11 matching with the first column is arranged on the extension plate. A spring 9 is connected between the first column and the second column. By arranging the spring, the stability of the transmission mechanism is improved.

[0026] The utility model aims to provide a pressure switch including a diaphragm, which pries a balance plate by deforming the diaphragm so that a push rod on the tilted end of the balance plate moves upward, thereby utilizing the push rod to trigger a micro switch, thereby further improving the sensing accuracy of the pressure switch.

[0027] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the technical solution of the present invention also belong to the protection scope of the present invention.

Claims

1. A pressure switch including a diaphragm, comprising a housing (1), characterized in that: It also comprises a transmission mechanism (2), an air cavity (3) is formed in the housing (1), a diaphragm (4) is provided at the bottom of the air cavity (3), and a transmission mechanism (2) is provided below the diaphragm (4); The transmission mechanism (2) comprises a fixed plate (21), a movable plate (22) is transversely arranged on the fixed plate (21), a retaining column (5) is vertically arranged at one end of the movable plate (22), a connecting ring (23) is arranged on the outer sleeve of the retaining column (5), one end of the connecting ring (23) is in contact with the diaphragm, and the other end is connected to a moving ring (24) through a connecting rod, and the moving ring (24) is sleeved outside the positioning column (6); The movable plate (22) is connected to a balancing plate (25), a top rod (27) is symmetrically arranged on the top surface of the balancing plate (25), and a micro switch (8) is arranged above the top rod (27).

2. The pressure switch comprising a diaphragm according to claim 1, characterized in that: A pressing block (7) in contact with the connecting ring is fixedly arranged on the diaphragm sheet (4), and the free end of the pressing block (7) is tapered.

3. The pressure switch comprising a diaphragm according to claim 2, characterized in that: The positioning column (6) is vertically arranged on the fixing plate, and its center is located on the same vertical line as the center of the fixing column.

4. The pressure switch comprising a diaphragm according to claim 3, characterized in that: The movable plate (22) is rotatably connected to the fixed plate via a rotating shaft (26), and the rotating shaft (26) passes through the fixed plate and is fixedly connected to the balance plate.

5. The pressure switch comprising a diaphragm according to claim 4, characterized in that: The free end of the push rod (27) is an arc-shaped end.

6. The pressure switch comprising a diaphragm according to claim 5, characterized in that: A first column is arranged on the movable plate (22) between the connecting ring (23) and the rotating shaft (26), and an extension plate is arranged on one side of the movable ring (24), and a second column matching with the first column is arranged on the extension plate.

7. The pressure switch comprising a diaphragm according to claim 6, characterized in that: A spring (9) is connected between the first column and the second column.

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