A membrane switch and a sterilizer

Abstract

A membrane switch and a sterilizer, the membrane switch comprises: a switch body, wherein there is a cavity with upper and lower conduction, and the upper part of the cavity is set as a reduced diameter; the upper part of the switch body is provided with an external structure; a push rod, comprising a lower push rod base and a rod body perpendicular to the push rod base, and a spring is arranged outside the rod body; the rod body extends outward through the reduced diameter of the cavity inside the switch body and is close to the action reed of the micro switch; a membrane body, the membrane body comprises an upper connector, a membrane cavity and a lower connector that are internally conducted; the membrane cavity is designed as a columnar film cavity with at least part of the outer wall being foldable and retractable; a switch base, wherein an air guide hole is axially arranged inside the switch base, the switch base is assembled at the bottom of the switch body and the lower connector of the membrane body is fixed to the bottom of the switch body. The patent adds safety insurance, so that even if there are technical problems with other monitoring equipment, the safety of the user will be guaranteed to the minimum extent.

Description

Technical Field

[0001] The utility model relates to the field of control switches, in particular to a membrane switch and a sterilizer using the membrane switch. Background Art

[0002] In some areas, it is necessary to test the pressure of the working environment, such as sterilizers. Sterilizers are designed to eliminate bacteria in items by taking advantage of the fact that bacteria cannot survive under high temperature and high pressure. When in use, the water in the container is heated by an electric heating tube placed in the container to generate high-temperature and high-pressure steam, which is then used for sterilization. In order to ensure the safety of the sterilization process, we usually control the lid through a program so that it cannot be opened when there is pressure, and only when there is no pressure can it be opened. However, considering the risk of program failure, in order to avoid the harm caused by failure, industrial designers have designed a diaphragm switch system to add a safety protection. Utility Model Content

[0003] The first purpose of the utility model is to provide a membrane switch with reasonable structure and convenient assembly;

[0004] The second purpose of the utility model is to provide a sterilizer with higher safety.

[0005] In order to achieve the above object, the utility model provides a membrane switch, comprising

[0006] A switch body, wherein the switch body has a cavity with upper and lower conductive portions; an external connection structure is provided at the upper portion of the switch body, and the upper portion of the cavity of the switch body is configured to be of a reduced diameter;

[0007] A push rod, the push rod comprises a push rod base and a rod body perpendicular to the push rod base, a spring is disposed outside the rod body; the rod body passes through the contraction diameter at the upper part of the cavity inside the switch body and extends outward, and the upper end of the rod body is close to the action reed of the micro switch to be controlled, and the spring is located in the contraction diameter;

[0008] A diaphragm body, the diaphragm body comprising an internally conductive upper connector, a diaphragm cavity and a lower connector; the diaphragm cavity is designed as a columnar film cavity with at least a portion of the outer wall being foldable and retractable; the upper connector of the diaphragm body is sealed and fixed below the top rod base;

[0009] A switch base, wherein an air guide hole is axially arranged inside the switch base, the switch base is assembled on the bottom of the switch body and the lower connector of the diaphragm body is fixed on the bottom of the switch body;

[0010] When the internal pressure of the diaphragm body increases, the folded outer wall of the diaphragm cavity stretches, the diaphragm body pushes the push rod to push the micro switch outward, the spring is compressed, and the micro switch is started; when the internal pressure of the diaphragm body decreases, the diaphragm body folds back by itself, the spring recovers, and the push rod leaves the micro switch.

[0011] Furthermore, the lower part of the cavity in the switch body is set to be enlarged, the lower connector of the diaphragm body is set to be a laterally extended plane, and the upper top of the switch base clamps the lower connector of the diaphragm body to the enlarged lower part of the cavity of the switch body.

[0012] Furthermore, the upper end surface of the switch base is designed to be a flat plane. When the lower connector of the diaphragm body is clamped to expand the diameter, the transversely extended plane is in close contact with the upper end surface, thereby achieving a better close contact and sealing effect.

[0013] Furthermore, a fixing block extends from under the push rod base of the push rod, and an annular groove is formed between the fixing block and the push rod base; the upper connecting head of the diaphragm body is configured as a covering cavity, and the covering cavity covers the fixing block of the push rod base therein, and the upper end of the covering cavity is designed as a transverse inner annular edge, and the annular edge is buckled back to the annular groove to form a sealing covering for the fixing block.

[0014] Furthermore, the external connection structure on the switch body is that the upper end of the switch body is set as a first external threaded connection part, and the outer wall of the first external threaded connection part is provided with an external thread.

[0015] Furthermore, the switch base includes an upper second threaded portion, an intermediate lateral limiting structure and a lower mounting plug. The bottom of the switch body is correspondingly provided with an inner wall thread. The switch base is threadedly connected to the bottom of the switch body through the second threaded portion and is finally limited to the lateral limiting structure.

[0016] Furthermore, the installation plug of the switch base is provided with a circle of protruding screw threads on the outside, and the screw threads are used for externally connecting pipes.

[0017] Furthermore, a step edge is further provided above the reduced diameter, and the spring is limited on the step edge.

[0018] Furthermore, the diaphragm body is entirely made of silicone material.

[0019] Furthermore, a switch frame is provided, wherein the switch frame is provided with a first fixing seat for fixing the switch body, and a second fixing seat for fixing the micro switch.

[0020] A sterilizer comprises a sterilizer body and a sealing cover, wherein the sealing cover can be opened or closed under control, and the sterilizer body is provided with an air pipe connected to the outside, and the air pipe and the switch base-shaped air conduction perforation of the diaphragm switch described in any one of the above items form a closed conduction structure; the micro switch to be controlled is pushed / left by a push rod to control its opening / closing, and the opening / closing of the micro switch is used to control the opening / closing of the sealing cover through electrical control.

[0021] This patent adds a safety insurance to the sterilizer through reasonable design and configuration. That is, even if other control conditions allow the sterilizer to be opened, this patent provides the most direct air pressure monitoring for the sterilizer, using a physical membrane structure switch to directly determine the internal air pressure state of the sterilizer to ensure that the air pressure is at least in a safe state before the sealing cover of the sterilizer is allowed to be opened. This design ensures the safety of the user to the minimum extent even if other monitoring equipment has technical problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded schematic diagram of an embodiment of the utility model; a three-dimensional cross-sectional schematic diagram;

[0023] Figure 2 The following is a schematic diagram of the use status of the embodiment of the utility model. Figure 1 ;

[0024] Figure 3 for Figure 2 BB cross-section diagram;

[0025] Figure 4 The following is a schematic diagram of the use status of the embodiment of the utility model. Figure 2 ;

[0026] Figure 5 for Figure 4 AA section view;

[0027] Figure 6 It is a schematic diagram of a specific application of an embodiment of the utility model.

[0028] Reference Numbers

[0029] 10. Diaphragm switch; 1. Switch body; 11. Cavity; 112. Reduced diameter; 1121. Step edge; 113. Expanded diameter; 12. External connection structure; 121. First screw connection; 122. External thread; 13. Inner wall thread; 123. Nut; 2. Push rod; 21. Push rod base; 211. Fixed block; 212. Annular groove; 22. Rod body; 221. Upper end; 23. Spring; 3. Diaphragm body; 31. Upper connector; 311. Envelope cavity shape; 312. Annular edge; 32. Diaphragm cavity; 321. Folding and telescopic outer wall; 32 2. Columnar film cavity; 33. Lower connector; 331. Laterally extending plane; 34. Teflon gasket; 4. Switch base; 41. Air guide hole; 42. Second threaded portion; 421. Upper end surface; 43. Lateral limit structure; 44. Mounting plug; 441. Screw thread; 5. Switch frame; 51. First fixed seat; 511. Screw hole; 52. Second fixed seat; 53. Switch baffle; 6. A sterilizer; 61. Sterilizer body; 62. Sealing cover; 63. Air pipe; 64. Micro switch; 641. Action reed; 65. Control center. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0031] like Figure 1-5 As shown, a membrane switch 10 includes:

[0032] A switch body 1, wherein the switch body 1 has an upper and lower connected cavity 11; an external structure 12 is provided on the upper part of the switch body 1. In this embodiment, the external structure 12 is a first external screw connection portion 121 provided at the upper end of the switch body 1, and an external thread 122 is provided on the outer wall of the first external screw connection portion 121; the upper part of the cavity 11 of the switch body 1 is a reduced diameter 112, and a step edge 1121 is further provided above the reduced diameter 112; the lower part of the cavity 11 in the switch body 1 is an expanded diameter 113;

[0033] A push rod 2, the push rod 2 includes a push rod base 21 below and a rod body 22 perpendicular to the push rod base 21, a spring 23 is disposed outside the rod body 22; the rod body 22 passes through the reduced diameter 112 at the upper part of the cavity 11 inside the switch body 1 and extends outward, the spring outside the rod body is located in the reduced diameter 112, in this embodiment, the spring is limited to the step edge 1121 of the reduced diameter 112; a fixing block 211 extends from the bottom of the push rod base 21, and an annular groove 212 is formed between the fixing block 211 and the push rod base 21;

[0034] A diaphragm body 3, the diaphragm body 3 includes an internally conductive upper connector 31, a diaphragm cavity 32 and a lower connector 33; the diaphragm cavity 32 is designed as a columnar film cavity 322 with at least part of the outer wall being foldable and retractable. In this embodiment, the diaphragm cavity 32 is designed as a columnar film cavity 322 with a foldable and retractable outer wall 321; the upper connector 31 of the diaphragm body 3 is sealed and fixed below the top rod base 21. In this embodiment, the diaphragm body 3 is generally made of silicone material as a whole, which has both the softness and hardness of folding and retracting, and allows the upper connector 31 and the lower connector 33 to achieve a good sealing effect in external sealing; the upper connector 31 of the diaphragm body 3 is set as a covering cavity 311, such as Figure 3 As shown, the covering cavity 311 covers the fixing block 211 of the top rod base 21 therein, and the upper end portion 221 of the covering cavity 311 is designed as a transverse inner annular edge 312, and the annular edge 312 is buckled into the annular groove 212 to form a sealing covering for the fixing block 211; the lower connector 33 of the diaphragm body 3 is set as a transversely extending plane 331;

[0035] A switch base 4, such as Figure 3 As shown, an air guide hole 41 is axially arranged inside the switch base 4, the switch base is assembled at the bottom of the switch body 1 and fixes the lower connector 33 of the diaphragm body 3 to the bottom of the switch body 1; the switch base 4 includes an upper second screw connection portion 42, an intermediate transverse limiting structure 43 and a lower mounting plug 44, the bottom of the switch body 1 is correspondingly provided with an inner wall thread 13, the switch base 4 is screwed to the bottom of the switch body 1 through the second screw connection portion 42, and is finally limited to the transverse limiting structure 43; the mounting plug 44 of the switch base 4 is provided with a circle of protruding screw teeth 441 on the outside, and the screw teeth are used for external pipes The second screw connection part 42 of the switch base clamps the lower connector 33 of the diaphragm body 3 at the lower expanded diameter 113 of the cavity 11 of the switch body 1. In this embodiment, the upper end surface 421 of the second screw connection part 42 of the switch base is designed as a flat plane. When the lower connector 33 of the diaphragm body 3 is clamped at the expanded diameter 113, the transversely extended plane 331 is closely attached to the upper end surface 421 of the second screw connection part 42. At the same time, a Teflon gasket 34 is clamped at the transversely extended plane 331 and the step edge of the expanded diameter 113, thereby achieving an excellent close sealing effect.

[0036] like Figure 1 As shown, a switch frame 5 is further provided, and the switch frame 5 is provided with a first fixing seat 51 for fixing the switch body 1, and a second fixing seat 52 for fixing the micro switch 64; and a switch baffle 53 is further provided to protect the micro switch 64 from being accidentally touched;

[0037] The first fixing seat 51 is provided with a screw hole 511, and the first screw connection portion 121 of the switch body 1 passes through the screw hole 511 and is locked on the first fixing seat 51 by a nut 123; the upper end portion 221 of the rod body 22 is close to the action reed 641 of the micro switch 64 to be controlled, as shown in FIGS. 4 and 5;

[0038] like Figure 6 As shown, a sterilizer 6 comprises a sterilizer body 61 and a sealing cover 62, wherein the sealing cover 62 can be opened or closed under control, and is characterized in that: the sterilizer body 61 is provided with an air pipe 63 conducting to the outside, and the air pipe 63 forms a closed conducting structure with the air guide hole 41 in the shape of the switch base 4 of the above-mentioned diaphragm switch 10; the micro switch 64 to be controlled is pushed / left by the push rod 2 to control its opening / closing, and the opening / closing of the micro switch 64 is used to control the opening / closing of the sealing cover 62 through electrical control.

[0039] In this embodiment, the micro switch 64 is further electrically connected to the control center 65, and the control center 65 is electrically connected to the sealing cover 62 to control the opening / closing of the sealing cover 62;

[0040] like Figure 2 , 3 As shown, during the production sterilization process, the sterilizer will increase its internal pressure under high temperature and high pressure, and the air pressure inside the sterilizer will be conducted with the diaphragm switch 10 through the air pipe 63; when the air pressure is relatively high, the internal pressure of the diaphragm body 3 will increase, the foldable and telescopic outer wall 321 will stretch, the spring 23 will compress, and the diaphragm body 3 will push the top rod 2 to push the action reed 641 of the micro switch 64 outwards. At this time, the micro switch 64 will be triggered to send a continuous electrical signal to the control center 65. In a general embodiment, it can be set that during the period when the control center 65 receives the continuous electrical signal, the sealing cover 62 will continuously output a command prohibiting opening, and any other command will not allow the sealing cover 62 to be opened, so as to ensure that a safety guarantee is added in the sterilization process to prevent the high temperature and high pressure gas of the sterilizer from burning the user;

[0041] Only after the sterilizer is cooled down and the internal air pressure drops to a safe range, the air pressure in the diaphragm switch 10 decreases due to air pressure conduction with the sterilizer. The foldable and telescopic outer wall 321 of the diaphragm body 3 folds back by itself, and the external spring 23 recovers from a compressed state to a relaxed state. The diaphragm body 3 then drives the push rod 2 to retract inward and leave the action reed 641. At this time, the microswitch 64 no longer sends an electrical signal to the control center 65, and the control center no longer prohibits the sealing cover 62 from being opened. When other opening conditions are met, the control center can control the opening of the sealing cover 62.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A membrane switch, characterized in that: include A switch body, wherein the switch body has a cavity with upper and lower conductive parts; an external connection structure is provided at the upper part of the switch body, and the upper part of the cavity of the switch body is set to be a reduced diameter; A push rod, the push rod comprises a push rod base and a rod body perpendicular to the push rod base, a spring is disposed outside the rod body; the rod body passes through the contraction diameter at the upper part of the cavity inside the switch body and extends outward, and the upper end of the rod body is close to the action reed of the micro switch to be controlled, and the spring is located in the contraction diameter; A diaphragm body, the diaphragm body comprising an internally conductive upper connector, a diaphragm cavity and a lower connector; the diaphragm cavity is designed as a columnar film cavity with at least a portion of the outer wall being foldable and retractable; the upper connector of the diaphragm body is sealed and fixed below the top rod base; A switch base, wherein an air guide hole is axially arranged inside the switch base, the switch base is assembled on the bottom of the switch body and the lower connector of the diaphragm body is fixed on the bottom of the switch body; When the internal pressure of the diaphragm body increases, the outer wall of the diaphragm cavity stretches, the diaphragm body pushes the push rod to push the micro switch outward, the spring is compressed, and the micro switch is started; when the internal pressure of the diaphragm body decreases, the outer wall of the diaphragm cavity of the diaphragm body self-recovers and folds, and the push rod leaves the micro switch.

2. A membrane switch as claimed in claim 1, characterized in that: The lower part of the cavity in the switch body is set to be enlarged, the lower connector of the diaphragm body is set to be a laterally extended plane, and the upper top of the switch base clamps the lower connector of the diaphragm body to the enlarged lower part of the cavity of the switch body.

3. A membrane switch as claimed in claim 2, characterized in that: The upper end surface of the switch base is designed as a flat plane. When the lower connector of the diaphragm body is clamped to expand the diameter, the transversely extended plane is in close contact with the upper end surface, thereby achieving a better close contact and sealing effect.

4. A membrane switch as claimed in claim 1, characterized in that: A fixing block extends from the bottom of the push rod base of the push rod, and an annular groove is formed between the fixing block and the push rod base; the upper connecting head of the diaphragm body is configured as a covering cavity, and the covering cavity covers the fixing block of the push rod base therein, and the upper end of the covering cavity is designed as a transverse inner annular edge, and the annular edge is buckled back to the annular groove to form a sealing covering for the fixing block.

5. A membrane switch as claimed in claim 1, characterized in that: The external connection structure on the switch body is that the upper end of the switch body is set as a first external threaded connection part, and the outer wall of the first external threaded connection part is provided with an external thread.

6. A membrane switch as claimed in claim 1, characterized in that: The switch base includes an upper second threaded portion, an intermediate lateral limiting structure and a lower mounting plug. The bottom of the switch body is correspondingly provided with an inner wall thread. The switch base is threadedly connected to the bottom of the switch body through the second threaded portion and is finally limited to the lateral limiting structure.

7. A membrane switch as claimed in claim 6, characterized in that: The installation plug of the switch base is provided with a circle of protruding screw threads on the outside, and the screw threads are used for externally connecting pipelines.

8. A membrane switch as claimed in claim 1, characterized in that: A step edge is further arranged above the reduced diameter, and the spring is limited at the step edge.

9. A membrane switch as claimed in claim 1, characterized in that: The diaphragm body is entirely made of silica gel.

10. A membrane switch as claimed in claim 1, characterized in that: A switch frame is further provided, and the switch frame is provided with a first fixing seat for fixing the switch body, and a second fixing seat for fixing the micro switch.

11. A sterilizer, comprising a sterilizer body and a sealing cover, wherein the sealing cover can be controlled to be opened or closed, characterized in that: The sterilizer body is provided with an air pipe conducting to the outside, and the air pipe forms a closed conducting structure with the switch base-shaped air conduction perforation of the diaphragm switch described in any one of claims 1 to 10; the micro switch to be controlled is pushed / left by the push rod to control its opening / closing, and the opening / closing of the micro switch is controlled by electric control to control the opening / closing of the sealing cover.

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