CN206950046U - Overvoltage protection switch and there are its pressure means - Google Patents

Abstract

The utility model discloses a kind of overvoltage protection switch and pressure means, the overvoltage protection switch includes：Switch main body, formed with connected entrance on the Switch main body；First switch terminal and plastically deformable or the second switch terminal of fracture, described first and the second switch terminal be each provided in the Switch main body, the first switch terminal has the first contact, and the second switch terminal has the second contact often contacted with first contact；Touch part, the touch part are disposed adjacent with the second switch terminal；Seal, the seal is connected with the touch part, the seal when being configured to reach predetermined pressure by the environmental pressure that the connected entrance applies the seal drive the touch part to touch the second switch terminal to make the second switch terminal produce plastic deformation or be broken so that second contact and first contact separation.According to overvoltage protection switch of the present utility model, it is possible to achieve the power-off protection under exception is over-pressed.

Description

Overvoltage protection switch and there are its pressure means

Technical field

Household appliance technical field is the utility model is related to, more particularly, to a kind of overvoltage protection switch and there is its pressure device Tool.

Background technology

In correlation technique, the normal pressure use range of electric pressure cooking saucepan is at 70kPa (kPa).In electric pressure cooking saucepan normal use During, generally use relief valve or make crack between the pot of electric pressure cooking saucepan and lid (now electric pressure cooking saucepan for elasticity press Power pot) mode realize normal pressure release.However, between pressure release defective valve or pot and lid can not normally crack to discharge During gas in electric pressure cooking saucepan, easily there is situation about popping in electric pressure cooking saucepan, so as to be damaged to user.Moreover, above-mentioned adopt The pressure transient of pressure release is carried out with the mode of crack, and easily because the gas leakage of HTHP damages to user.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.It is therefore, of the present utility model One purpose is to propose a kind of overvoltage protection switch, and the structure of the overvoltage protection switch is simple.

Another purpose of the present utility model is to propose a kind of pressure means with above-mentioned overvoltage protection switch.

According to the overvoltage protection switch of the utility model first aspect, including：Switch main body, formed on the Switch main body There is the connected entrance communicated with external environment condition；First switch terminal and plastically deformable or the second switch terminal of fracture, described One switch terminal and the second switch terminal are each provided in the Switch main body, and the first switch terminal has first to touch Point, the second switch terminal have the second contact, and second contact often contacts with first contact；Touch part, it is described Touch part is disposed adjacent with the second switch terminal；Seal, the seal are connected with the touch part, the seal The seal drives the touch part to touch when being configured to reach predetermined pressure by the environmental pressure that the connected entrance applies The second switch terminal makes the second switch terminal produce plastic deformation or be broken so that second contact and described the One contact separation.

Simple in construction according to overvoltage protection switch of the present utility model, cost is low.When overvoltage protection switch is used for pressure device During tool, by setting the second switch terminal of plastically deformable or fracture, when the pressure in pressure means reaches predetermined pressure, First contact and the second contact disconnect, and can make pressure means has the heating of first switch terminal and second switch terminal electricity Road disconnects, so as to effectively realize the power-off protection in the case where exception is over-pressed, moreover, in above process, due to second switch Terminal, which is touched after part touches, can produce plastic deformation or fracture, so as to the first contact and the second contact can remain at it is disconnected Open state, be not in the situation that heater continues heating, further increase the safety in utilization of pressure means.In addition, By setting Switch main body, first switch terminal, second switch terminal, touch part and seal can be integrated in Switch main body It is interior so that overvoltage protection switch is a global facility, in use, can facilitate and quickly be attached to overvoltage protection switch Pressure means, improve efficiency of assembling.By setting seal, the reliability of overvoltage protection switch action can be effectively ensured.

According to some embodiments of the utility model, the second switch terminal has weak point, the thickness of the weak point Thickness of the degree less than the other parts of the second switch terminal.

According to some embodiments of the utility model, formed on a side surface of the neighbouring touch part of the weak point It is fluted.

According to some embodiments of the utility model, the first end of the second switch terminal and the Switch main body phase Even, the weak part is in the first end of the second switch terminal.

According to some embodiments of the utility model, fixed seat is provided with the Switch main body, is formed in the fixed seat There is pilot hole, the touch part is movably located at the pilot hole.

According to some embodiments of the utility model, on the periphery wall of one end of the neighbouring connected entrance of the touch part Provided with the backstop muscle to stretch out, the overvoltage protection switch further comprises：Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head are only supported Between the fixed seat and the backstop muscle, the dynamic clamping head and quiet clamping head is configured to often promote institute towards the direction of the connected entrance State touch part.

According to some embodiments of the utility model, the seal is diaphragm seal, when what is applied by the connected entrance Environmental pressure when being not up to the predetermined pressure seal bloated to the connected entrance to block the connected entrance, when passing through The seal is directed away from the direction of the connected entrance when environmental pressure that the connected entrance applies reaches the predetermined pressure Bulging.

According to some embodiments of the utility model, the predetermined pressure is P, and the P meets：140kPa≤P≤ 200kPa。

According to the pressure means of the utility model second aspect, including the overvoltage according to the above-mentioned first aspect of the utility model Protection switch.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is that wherein environmental pressure is less than predetermined according to the profile of the overvoltage protection switch of the utility model embodiment Pressure；

Fig. 2 is reached according to another profile of the overvoltage protection switch of the utility model embodiment, wherein environmental pressure To predetermined pressure；

Fig. 3 is reached according to the profile of the overvoltage protection switch of the utility model another embodiment, wherein environmental pressure To predetermined pressure.

Reference：

100：Overvoltage protection switch；

1：Switch main body；11：Connected entrance；

12：Fixed seat；121：Pilot hole；

2：First switch terminal；21：First contact；

3：Second switch terminal；31：Second contact；32：Weak point；

4：Touch part；41：Backstop muscle；5：Seal；

6：Dynamic clamping head and quiet clamping head；7：Wire.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings Orientation or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified dress Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model Limitation.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In description of the present utility model, unless otherwise indicated, the implication of " multiple " It is two or more.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special Sign second feature " under ", " lower section " and " below " including fisrt feature directly over second feature and oblique upper, or only Represent that fisrt feature level height is less than second feature.

Overvoltage protection switch 100 below with reference to Fig. 1-Fig. 3 descriptions according to the utility model first aspect embodiment.Overvoltage Protection switch 100 can be used for needing the pressure means such as electric pressure cooking saucepan (not shown) for carrying out pressure cut-off protection especially On rigid pressure pot (i.e. in electric pressure cooking saucepan whole work process, pot and lid remain fully sealed position).Work as pressure The normal pressure relief device such as pressure release defective valve of power utensil such as electric pressure cooking saucepan occur that abnormal over-pressed (pressure i.e. in pressure means is big In its normal pressure use range such as 70kPa) when, it can be incited somebody to action according to the overvoltage protection switch 100 of the utility model embodiment Heater power-off in pressure means, heats heater stop, prevents the pressure in pressure means from further raising, protect The security that card user uses.In the description below the application, enter so that overvoltage protection switch 100 is used on electric pressure cooking saucepan as an example Row explanation.Certainly, it will be understood to those skilled in the art that overvoltage protection switch 100 can be also used for other pressure means Such as electric pressure pot is first-class.

As shown in Figure 1-Figure 3, according to the overvoltage protection switch 100 of the utility model first aspect embodiment, including switch Body 1, first switch terminal 2, second switch terminal 3, touch part 4 and seal 5.

Formed with the connected entrance 11 communicated with external environment condition on Switch main body 1.For example, as shown in Figure 1-Figure 3, connected entrance 11 It can be formed in the bottom of Switch main body 1.Here, it is necessary to which explanation, " external environment condition " can be understood as when overvoltage protection is opened When pass 100 is used for pressure means such as electric pressure cooking saucepan, outside, the inside of pressure means such as electric pressure cooking saucepan of Switch main body 1.

Referring to Fig. 1-Fig. 3, first switch terminal 2, second switch terminal 3, touch part 4 and seal 5 can be each provided at In Switch main body 1.Thus, first switch terminal 2, second switch terminal 3, touch part 4 and sealing can be accommodated by setting The Switch main body 1 of part 5, improve the integration of overvoltage protection switch 100., only need to be by overvoltage protection switch in actual use 100 are arranged on pressure means for example on electric pressure cooking saucepan and by the cut-in pressure utensil such as electric pressure cooking saucepan of overvoltage protection switch 100 Heater circuit (not shown).Wherein, overvoltage protection switch 100 can be removably mounted on pressure means such as voltage On power pot, in order to the dismounting and replacing of overvoltage protection switch 100.

First switch terminal 2 has the first contact 21, and second switch terminal 3 has the second contact 31, the second contact 31 with First contact 21 often contacts.For example, as shown in Figure 1-Figure 3, first switch terminal 2 and second switch terminal 3 can be arranged up and down, And first switch terminal 2 is located at the lower section of second switch terminal 3, the first contact 21 is located on the upper surface of first switch terminal 2 And protruding upward formed by a part of of upper surface of first switch terminal 2.Second switch terminal 3 is horizontally disposed, specifically, The first end (for example, left end in Fig. 1-Fig. 3) of second switch terminal 3 is connected with Switch main body 1, and the second contact 31 is located at second The second end (for example, right-hand member in Fig. 1-Fig. 3) of switch terminal 3 and with the first contact face about 21, so can effectively protect Demonstrate,prove the first contact 21 to contact well with the second contact 31, and then the normal work of pressure means such as electric pressure cooking saucepan can be ensured. Second contact 31 can be downwardly protrude to form by a part for the lower surface of second switch terminal 3.The plasticity of second switch terminal 3 Deformation or fracture.

Wherein, the above-mentioned first end of second switch terminal 3 is fixing end, now the first end of second switch terminal 3 be by Fixed, the first end of second switch terminal 3 does not have relative motion relative to overvoltage protection switch 100, second switch terminal 3 Above-mentioned second end is movable end, and the second end of second switch terminal 3 can move.Opened because the second contact 31 is located at second The second end of terminal 3 is closed, so as to the second end of second switch terminal 3 the second contact 31 can be driven to move up and down, so that second Contact 31 contacts with the first contact 21, or is separated with the first contact 21.

First switch terminal 2 and second switch terminal 3 are connected to pressure means suitable for (for example, by way of wire 7) Such as in the heater circuit of electric pressure cooking saucepan, the heater circuit includes heater.When pressure means such as electric pressure cooking saucepan normally makes Used time, the first contact 21 remain and contacted that heater circuit often turns on the second contact 31, heater work, with to pressure Food in utensil etc. is heated.

Alternatively, the surfaces opposite to each other of the first contact 21 and the second contact 31 can be common by cambered surface and plane respectively Form, the plane is located at the top of the first contact 21 and the second contact 31, thus, due to the first contact 21 and the second contact 31 it Between contact be face contact, contact area is big so that the first contact 21 contacts well with the second contact 31, is heated so as to ensure that The reliability of circuit.Certainly, the surfaces opposite to each other of the first contact 21 and the second contact 31 can also be formed as outwardly Cambered surface (not shown) such as sphere.It is understood that the concrete shape of the first contact 21 and the second contact 31 can be with Specifically set according to actual requirement, preferably to meet actual requirement.

Touch part 4 is disposed adjacent with second switch terminal 3.For example, as shown in Figure 1-Figure 3, touch part 4 is located at second switch The side (for example, downside in Fig. 1-Fig. 3) of the neighbouring first switch terminal 2 of terminal 3.Touch part 4 normal conditions (for example, It is not abnormal over-pressed) under do not contacted with second switch terminal 3.

Seal 5 is connected with touch part 4, and seal 5 is configured to reach predetermined by the environmental pressure that connected entrance 11 applies During pressure, seal 5 drive touch part 4 touch second switch terminal 3 make second switch terminal 3 produce plastic deformation or be broken with The second contact 31 is set to be separated with the first contact 21.Here, it is necessary to illustrate, when overvoltage protection switch 100 is used for pressure means Such as when on electric pressure cooking saucepan, " environmental pressure " can be understood as pressure of the pressure means for example in electric pressure cooking saucepan.Seal 5 can be with The inside of Switch main body 1 is opened with pressure means such as electric pressure cooking saucepan internal insulation, makes the inside of Switch main body 1 and pressure means for example There is pressure difference, so as to when pressure means such as electric pressure cooking saucepan internal abnormality overvoltage, seal 5 can be between electric pressure cooking saucepan inside Driving touch part 4 to touch second switch terminal 3 in the presence of the pressure difference of both sides makes second switch terminal 3 produce plastic deformation or disconnected Split, and then the second contact 31 is disconnected with the first contact 21.

When pressure means such as electric pressure cooking saucepan normal work, the second contact 31 and the first contact 21 keep normal contact condition So that heater normal work, as shown in Figure 1；When pressure of the pressure means for example in electric pressure cooking saucepan reaches predetermined pressure (example Such as, it is abnormal over-pressed) when, seal 5 can drive touch part 4 to touch second switch terminal 3, second switch terminal 3 is produced modeling Property deformation or fracture, specifically, for example, when second switch terminal 3 produce plastic deformation when, as shown in Fig. 2 touch part 4 is upward Touch second switch terminal 3 and the second end of second switch terminal 3 is inclined upwardly and deform, and then make the second contact 31 and the One contact 21 separates, and now heater circuit disconnects, and heater stop work, pressure of the pressure means for example in electric pressure cooking saucepan is not It is further continued for rising, user is damaged so as to avoid pressure of the pressure means for example in electric pressure cooking saucepan from continuing to rise, The protection to pressure means such as electric pressure cooking saucepan is also achieved simultaneously, is become due to being deformed into plasticity caused by second switch terminal 3 Shape, i.e., the not resilient after external force of application is removed or disappeared, even if now touch part 4 no longer touches second switch upwards Terminal 3 (i.e. touch part 4 does not contact with second switch terminal 3), the second contact 31 can also be maintained at shown in Fig. 2 with first 21 discontiguous position of contact, so as to add security of the pressure means such as electric pressure cooking saucepan under abnormal overpressure situation；When When second switch terminal 3 is broken, as shown in figure 3, the fracture of the second end with the second contact 31 of second switch terminal 3, no longer Contacted with the first contact 21, so as to which heater circuit disconnects, heater stop work, now equally can effectively realize superpressure shape Power-off protection under state, and because second switch terminal 3 has been broken, from without the second contact 31 and the first contact 21 situations for contacting again and turning on heater circuit.

Thus, by setting the second switch terminal 3 of plastically deformable or fracture, the first use of overvoltage protection switch 100 After (the first contact 21 and the second contact 31 disconnect) can not Self-resetting, i.e. the first contact 21 and the second contact 31 will not contact again Turn on heater circuit, so as to further increase the security that pressure means such as electric pressure cooking saucepan uses.In addition, according to this reality With the overvoltage protection switch 100 of new embodiment avoid it is traditional by the way of the crack come pressure caused by carrying out pressure release not The problem of stable and because of HTHP gas leakage damages to user.

Alternatively, predetermined pressure P, P meet：140kPa≤P≤200kPa.Its concrete numerical value can be according to actual pressure The type of utensil such as electric pressure cooking saucepan and specifically set, preferably to meet actual requirement.

According to the overvoltage protection switch 100 of the utility model embodiment, simple in construction, cost is low.Work as overvoltage protection switch 100 when being used for pressure means such as electric pressure cooking saucepan, by setting the second switch terminal 3 of plastically deformable or fracture, works as pressure When pressure of the utensil for example in electric pressure cooking saucepan reaches predetermined pressure, the first contact 21 and the second contact 31 disconnect, and can make pressure There is utensil such as electric pressure cooking saucepan the heater circuit of first switch terminal 2 and second switch terminal 3 to disconnect, so as to effective The power-off protection in the case where exception is over-pressed is realized, moreover, in above process, after being touched the shake-up of part 4 due to second switch terminal 3 Plastic deformation or fracture can be produced, so as to which the first contact 21 and the second contact 31 can remain at off-state, will not be gone out Existing heater continues the situation of heating, further increases the safety in utilization of pressure means such as electric pressure cooking saucepan.It is in addition, logical Setting Switch main body 1 is crossed, first switch terminal 2, second switch terminal 3, touch part 4 and seal 5 can be integrated in switch In body 1 so that overvoltage protection switch 100 is a global facility, in use, can facilitate and quickly open overvoltage protection Close 100 and be attached to pressure means such as electric pressure cooking saucepan, improve efficiency of assembling.By setting seal 5, can be effectively ensured The reliability for pressing protection switch 100 to act.

According to some embodiments of the utility model, as shown in Figure 1-Figure 3, second switch terminal 3 has weak point 32, thin The thickness in weak portion 32 is less than the thickness of the other parts of second switch terminal 3.Thus, make the thickness of weak point 32 small by setting In the thickness of the other parts of second switch terminal 3, so as to when touch part 4 touches second switch terminal 3, be easy to second switch Terminal 3 produces plastic deformation or fracture, so as to further increase the reliability of power-off protection under abnormal overvoltage condition.Wherein, It can be weak point 32 that second switch terminal 3, which produces plastic deformation or the position of fracture,.

Further, it could be formed with groove on a side surface of the neighbouring touch part 4 of weak point 32.Such as Fig. 1 and Fig. 2 institutes Show, groove can be opened up on a side surface of the neighbouring touch part 4 of second switch terminal 3 to form weak point 32, groove can The direction that touch part 4 is directed away from the side surface by the neighbouring touch part 4 of second switch terminal 3 recessed is formed.Thus, lead to Cross on a side surface of the neighbouring touch part 4 that groove is arranged on to weak point 32, so as to which touch part 4 is applied to second switch terminal 3 Add less power second switch terminal 3 is produced plastic deformation or fracture, and then more effectively ensure that abnormal over-pressed The reliability of power-off protection under state.Certainly, groove is additionally formed in a side surface of the remote touch part 4 of weak point 32 On, or groove is set respectively in the both side surface of weak point 32, it now can equally realize the power-off under abnormal overvoltage condition Protect (not shown).

Alternatively, as shown in Figure 1-Figure 3, the first end (for example, left end in Fig. 1-Fig. 3) of second switch terminal 3 is with opening Close body 1 to be connected, weak point 32 is located at the above-mentioned first end of second switch terminal 3.Second contact 31 is located at second switch terminal 3 The second end.Touch part 4 is located between first end and the second end of second switch terminal 3, so as to which touch part 4 touches second switch The position of terminal 3 also is located between the first end of second switch terminal 3 and the second end.When touch part 4 touches second switch terminal 3 When, because the second end with the second contact 31 of second switch terminal 3 is movable end, so as to the second of second switch terminal 3 End can be directed away from the direction motion of first switch terminal 2, the second contact 31 is separated with the first contact 21, and weak point 32 is then Plastic deformation or fracture are produced, can be remained at the first contact 21 so as to the second contact 31 is effectively ensured and separate shape State.

Wherein, reference picture 1- Fig. 3, touch part 4 can be touch pole, and touch part 4 can be arranged with connected entrance about 11, touch Moving part 4 is coaxially disposed with connected entrance 11, and now the central axis of touch part 4 overlaps with the central axis of connected entrance 11.Thus, lead to Cross connected entrance 11 and act on simultaneously central axis side of active force of the indirectly-acting on touch part 4 approximately along touch part 4 of seal 5 To so as to which the stationarity of the motion of touch part 4 is effectively ensured, and then further ensuring the reliability of power-off protection.

Fixed seat 12 is provided with according to some embodiments of the utility model, in Switch main body 1, formed with leading in fixed seat 12 To hole 121, touch part 4 is movably located at pilot hole 121.Such as in Fig. 1-Fig. 3 example, pilot hole 121 is along upper Fixed seat 12 is run through in lower direction, and touch part 4 can be located at pilot hole 121 up or down.Pilot hole 121 has to touch part 4 There is guide effect, to ensure the accuracy of the motion of touch part 4.Alternatively, the bearing of trend of touch part 4 and second switch terminal 3 The plane at place is vertical, as shown in figure 1, thus, it is possible to preferably driving second switch terminal 3 to touch the second contact 31 and first The separation of point 21.

As shown in Figure 1-Figure 3, the periphery wall of one end of the neighbouring connected entrance 11 of touch part 4 is provided with the backstop to stretch out Muscle 41, overvoltage protection switch 100 further comprise：Dynamic clamping head and quiet clamping head 6, dynamic clamping head and quiet clamping head 6 are only against fixed seat 12 and backstop muscle Between 41, dynamic clamping head and quiet clamping head 6 is configured to often promote touch part 4 towards the direction of connected entrance 11.Specifically, for example, pilot hole 121 The first hole and the second hole being sequentially connected along the vertical direction can be included, the cross-sectional area in the second hole is more than the cross section in the first hole Product, the junction in the second hole and the first hole is stage portion, and dynamic clamping head and quiet clamping head 6 can be spring, and spring is set in outside touch pole, and The both ends of spring are only supported with the stage portion and backstop muscle 41 of pilot hole 121 respectively, often to promote touch part 4 downwards, that is, work as pressure When pressure of the utensil for example in electric pressure cooking saucepan is less than predetermined pressure, seal 5 can be by touch part 4 in dynamic clamping head and quiet clamping head 6 As blocked connected entrance 11 in the presence of spring.

Wherein, first switch terminal 2 and second switch terminal 3 can be each provided in fixed seat 12.Certainly, first switch end Son 2 and second switch terminal 3 can also be directly anchored on the inwall of Switch main body 1 (not shown).It is understood that the The specific set location of one switch terminal 2 and second switch terminal 3 can specifically be set according to actual requirement, preferably to meet Actual requirement.

For example, as shown in Figure 1-Figure 3, it is suitable to be fixed on installation formed with mounting groove, the lower end of touch part 4 on seal 5 In groove.The environmental pressure that seal 5 is configured to apply by connected entrance 11 inside pressure means such as electric pressure cooking saucepan (for example, press Power) when reaching predetermined pressure, seal 5 second switch terminal 3 touched by touch part 4 so that second switch terminal 3 second Contact 31 separates with the first contact 21 of first switch terminal 2.Seal 5 be used for by the inside of Switch main body 1 and connected entrance 11 every Open, for example, being opened with pressure means such as electric pressure cooking saucepan internal insulation, so that the inside of Switch main body 1 and pressure means such as voltage There is pressure difference, so as to which when pressure means such as electric pressure cooking saucepan internal abnormality overvoltage, seal 5 can be two between power pot inside Touch part 4 is driven to move up in the presence of side pressure difference.

Alternatively, seal 5 is diaphragm seal, when the environmental pressure applied by connected entrance 11 is not up to predetermined pressure, Seal 5 is bloated to connected entrance 11 to block connected entrance 11, for example, as shown in figure 1, the edge of diaphragm seal connects with for blocking Two layers of sealing is played a part of in the bottom of mouth 11, is effectively guaranteed the reliability of the action of touch part 4.Applied when by connected entrance 11 When the environmental pressure added reaches predetermined pressure, seal 5 is directed away from the direction bulging of connected entrance 11, as shown in Figures 2 and 3. Now seal 5 can be made of flexible material, can further improve the sealing effectiveness of seal 5.

According to the overvoltage protection switch 100 of the utility model embodiment, it is possible to achieve when pressure means such as electric pressure cooking saucepan When interior pressure is between 140kPa-200kPa, deenergization, overvoltage protection is realized.The principle of this kind of overvoltage protection switch 100 Be steam of the pressure means for example in electric pressure cooking saucepan by the access switch body 1 of connected entrance 11 inside, when steam pressure is more than bullet Property such as spring of return unit 6 elastic force when, seal 5 is opened on steam top, drives touch part 4 to move up, and touches second switch end Son 3, can flick upwards after the stress of second switch terminal 3 because being provided with weak point 32, weak point 32 by touch part 4 to On active force jack up after can produce plastic deformation or fracture, prevent first switch terminal 2 and second switch terminal 3 from formed with Effect connection, so as to cause the power-off of the inside of overvoltage protection switch 100 and irrecoverable, pressure of the pressure means for example in electric pressure cooking saucepan It will not continue to rise, the pressure protection that can be effectively increased in the case of superpressure, add pressure means such as electric pressure cooking saucepan Security.Moreover, compared with traditional mechanical pressure relief, more securely and reliably.

According to the pressure means such as electric pressure cooking saucepan of the utility model second aspect embodiment, including according to the utility model The overvoltage protection switch 100 of above-mentioned first aspect embodiment.

Wherein, pressure means include apparatus body and overvoltage protection switch 100.Overvoltage protection switch 100 is located at utensil sheet On body, wherein environmental pressure be apparatus body in pressure, when the pressure in apparatus body reaches predetermined pressure touch part 4 to Upper motion touches second switch terminal 3, and second switch terminal 3 is produced plastic deformation or fracture, so as to so that first touches The contact 31 of point 21 and second is maintained at released state.For example, specifically, apparatus body includes pot and lid, the top of pot Portion is opened wide, and cover cap is located at the top of pot, wherein, overvoltage protection switch 100 is located on lid, and positioned at the center of lid. Alternatively, overvoltage protection switch 100 is vertically arranged, and now connected entrance 11 can directly communicate with pot nside, the pressure in pot Power can act directly on the bottom of touch device by connected entrance 11.Seal 5 is provided between pot and lid, to ensure pot Sealing between body and lid.Overvoltage protection switch 100 is preferably detachably connected on apparatus body, in order to which overvoltage is protected The dismounting and replacing of shield switch 100.

According to the pressure means of the utility model embodiment such as electric pressure cooking saucepan, pressure anomaly power-off can be effectively provided and protected Shield, and reduce cost.

According to other compositions of the pressure means of the utility model embodiment such as electric pressure cooking saucepan and operate for ability All it is known for the those of ordinary skill of domain, is not detailed herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe Structure, material or feature are contained at least one embodiment or example of the present utility model.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or Person's feature can combine in an appropriate manner in any one or more embodiments or example.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle and objective of the present utility model, replaced And modification, the scope of the utility model are limited by claim and its equivalent.

Claims (9)

1. A kind of 1. overvoltage protection switch, it is characterised in that including：

   Switch main body, formed with the connected entrance communicated with external environment condition on the Switch main body；

   First switch terminal and plastically deformable or the second switch terminal of fracture, the first switch terminal and described second are opened Close terminal to be each provided in the Switch main body, the first switch terminal has the first contact, and the second switch terminal has Second contact, second contact often contact with first contact；

   Touch part, the touch part are disposed adjacent with the second switch terminal；

   Seal, the seal are connected with the touch part, and the seal is configured to the ring applied by the connected entrance Border pressure when reaching predetermined pressure the seal drive the touch part to touch the second switch terminal to make described second to open Terminal is closed to produce plastic deformation or be broken so that second contact and first contact separation.
2. 2. overvoltage protection switch according to claim 1, it is characterised in that the second switch terminal has weak point, The thickness of the weak point is less than the thickness of the other parts of the second switch terminal.
3. 3. overvoltage protection switch according to claim 2, it is characterised in that the neighbouring touch part of the weak point Formed on one side surface fluted.
4. 4. the overvoltage protection switch according to Claims 2 or 3, it is characterised in that the first end of the second switch terminal It is connected with the Switch main body,

   The weak part is in the first end of the second switch terminal.
5. 5. overvoltage protection switch according to claim 1, it is characterised in that be provided with fixed seat, institute in the Switch main body State and be movably located at the pilot hole formed with pilot hole, the touch part in fixed seat.
6. 6. overvoltage protection switch according to claim 5, it is characterised in that the neighbouring connected entrance of the touch part The periphery wall of one end is provided with the backstop muscle to stretch out,

   Further comprise：

   Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head are only against between the fixed seat and the backstop muscle, the dynamic clamping head and quiet clamping head It is configured to often promote the touch part towards the direction of the connected entrance.
7. 7. overvoltage protection switch according to claim 1, it is characterised in that the seal is diaphragm seal, when passing through The environmental pressure for stating connected entrance application is not up to during the predetermined pressure seal and bloated to the connected entrance to block Connected entrance is stated, the seal is directed away from institute when the environmental pressure applied by the connected entrance reaches the predetermined pressure State the direction bulging of connected entrance.
8. 8. overvoltage protection switch according to claim 1, it is characterised in that the predetermined pressure is P, and the P meets： 140kPa≤P≤200kPa。
9. 9. a kind of pressure means, it is characterised in that including the overvoltage protection switch according to any one of claim 1-8.