CN206197750U - Overvoltage protection switch and the pressure means with it - Google Patents

Abstract

The utility model discloses a kind of overvoltage protection switch and pressure means, the overvoltage protection switch includes：First switch terminal, second switch terminal, touch device, Switch main body, sealing device and locking fixed seat, first switch terminal have the first contact；Second switch terminal has the second contact often contacted with the first contact；Touch device includes touch pole, and touch device is provided with locking system；Sealing device drives touch pole to touch second switch terminal when sealing device is configured to reach predetermined pressure by the environmental pressure of connected entrance applying makes the second contact that the open position with the first contact separation is moved to from the contact position often contacted with the first contact；Lock groove is formed with locking fixed seat, holding tank is formed with touch pole, locking system stretches out holding tank makes the second contact be maintained at open position with lock groove cooperation with locking touch device.According to overvoltage protection switch of the present utility model, the power-off protection in the case where exception is over-pressed can be effectively realized.

Description

Overvoltage protection switch and the pressure means with it

Technical field

The utility model is related to household appliance technical field, more particularly, to a kind of overvoltage protection switch and the pressure device with it Tool.

Background technology

In correlation technique, the normal pressure of electric pressure cooking saucepan uses scope at 70kPa (kPa).Normally used in electric pressure cooking saucepan During, generally use relief valve or make crack between the pot of electric pressure cooking saucepan and lid (now electric pressure cooking saucepan is elastic pressure Power pot) mode realize normal pressure release.However, between pressure release defective valve or pot and lid can not normally crack discharging 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.

Utility model content

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

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：First switch terminal, the first switch end Son has the first contact；Second switch terminal, the second switch terminal has the second contact, second contact and described the One contact often contacts；Touch device, the touch device is disposed adjacent with the second switch terminal, and the touch device includes The touch pole of the second switch terminal can be touched, the touch device is provided with locking system；Switch main body, the switch sheet The connected entrance communicated with external environment condition is formed with body, wherein the first switch terminal, the second switch terminal and described Touch device is each provided in the Switch main body；Sealing device, the sealing device is located in the Switch main body, the sealing Device is connected with the touch pole, and the environmental pressure that the sealing device is configured to apply by the connected entrance reaches institute When stating predetermined pressure the sealing device drive the touch pole touch the second switch terminal make second contact from The contact position of first contact often contact moves to the open position with first contact separation；Locking fixed seat, institute State and be formed with lock groove in locking fixed seat, wherein being formed with the receiving opened wide towards the locking fixed seat on the touch pole Groove, the locking system is movably arranged in the holding tank, the locking system be suitable to stretch out the holding tank with it is described Lock groove coordinates makes second contact be maintained at the open position with touch device described in locking.

According to overvoltage protection switch of the present utility model, simple structure, low cost.When overvoltage protection switch is used for pressure device During tool such as electric pressure cooking saucepan, by setting touch device, locking system and locking fixed seat with lock groove, work as pressure device When pressure in tool reaches predetermined pressure, the first contact and the second contact disconnect, can make pressure means with first switch The heater circuit of terminal and second switch terminal disconnects, such that it is able to effectively realize the power-off protection in the case where exception is over-pressed, and, The second contact can be maintained at open position when the second contact is located at open position, be not in that heater continues to heat Situation, increased the safety in utilization of pressure means.

According to some embodiments of the present utility model,

The locking system includes：Lock piece, the lock piece is located in the holding tank；And elastic component, the elasticity Part is located between the inwall of the holding tank and the lock piece, and the elastic component is configured to be directed away from the touch pole center The direction of axis often promotes the lock piece.

Further, pilot hole is formed with the locking fixed seat, the touch pole is located in the pilot hole, and institute The first end for stating touch pole is suitable to stretch out the pilot hole shake-up second switch terminal, the second end of the touch pole and institute State sealing device to be connected, wherein the lock groove is connected with the pilot hole.

Further, the periphery wall at the second end of the touch pole is provided with the backstop muscle for stretching out, the overvoltage Protection switch is further included：Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head stops the inwall and the backstop for being against the pilot hole Between muscle, the direction that the dynamic clamping head and quiet clamping head is configured to be directed away from the second switch terminal often promotes the touch pole.

Alternatively, the first switch terminal and the second switch terminal are located in the locking fixed seat.

Alternatively, the sealing device is diaphragm seal, the sealing when second contact is located at the contact position Device is bloated to the connected entrance to block the connected entrance, the sealing when second contact is located at the open position The direction that device is directed away from the connected entrance bloats.

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

Alternatively, the pressure lifting surface area that the environmental pressure acts on the sealing device is S, wherein the S is full Foot：1mm²≤S≤100mm²。

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

Additional aspect of the present utility model and advantage 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 from description of the accompanying drawings below to embodiment is combined Become substantially and be readily appreciated that, wherein：

Fig. 1 is the profile of the overvoltage protection switch according to the utility model embodiment, wherein the second contact is in contact Position；

Fig. 2 is another profile of the overvoltage protection switch according to the utility model embodiment, wherein at the second contact In open position.

Reference：

100：Overvoltage protection switch；

1：First switch terminal；11：First contact；

2：Second switch terminal；21：Second contact；

3：Touch pole；31：Holding tank；32：Backstop muscle；

4：Locking system；41：Lock piece；42：Elastic component；

5：Locking fixed seat；51：Lock groove；52：Pilot hole；6：Dynamic clamping head and quiet clamping head；

7：Switch main body；71：Connected entrance；8：Sealing device；9：Wire.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining Description of Drawings 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 ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", The orientation or position relationship of the instruction such as " axial direction ", " radial direction ", " circumference " are, based on orientation shown in the drawings or position relationship, to be only Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express 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 explanation, unless otherwise clearly defined and limited, term " is 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 mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Can be two connections of element internal.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.

The overvoltage protection switch 100 according to the utility model first aspect embodiment is described below with reference to Fig. 1 and Fig. 2.Cross Pressure 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 It is on rigid pressure pot (i.e. in electric pressure cooking saucepan whole work process, pot and lid remain fully sealed position).When There is the abnormal over-pressed (pressure i.e. in pressure means in the normal pressure relief device such as pressure release defective valve of pressure means such as electric pressure cooking saucepan Scope such as 70kPa is used more than its normal pressure) when, overvoltage protection switch 100 can be by the heater in pressure means Power-off, heats heater stop, prevents the pressure in pressure means from further raising.In description below the application, Illustrated so that overvoltage protection switch 100 is used on electric pressure cooking saucepan as an example.Certainly, it will be understood to those skilled in the art that mistake It is first-class that pressure protection switch 100 can be also used for other pressure means such as electric pressure pot.

As depicted in figs. 1 and 2, according to the overvoltage protection switch 100 of the utility model first aspect embodiment, including first Switch terminal 1, second switch terminal 2, touch device, Switch main body 7, sealing device 8 and locking fixed seat 5.

First switch terminal 1 has the first contact 11, and second switch terminal 2 has the second contact 21, the second contact 21 with The first often contact of contact 11.For example, as depicted in figs. 1 and 2, the first contact 11 be located at first switch terminal 1 side (for example, Upside in Fig. 1 and Fig. 2), upper surface protruding upward formation of first contact 11 from first switch terminal 1.

Second contact 21 is located at the free end (for example, the right-hand member in Fig. 1 and Fig. 2) of second switch terminal 2, the second contact 21 It is downwardly protrude to form from the lower surface of second switch terminal 2.Specifically, the first end of second switch terminal 2 is (for example, Fig. 1 and Tu Left end in 2) it is fixing end, now the first end of second switch terminal 2 is fixed, the first end of second switch terminal 2 Relative to overvoltage protection switch 100 without relative motion, the second end of second switch terminal 2 is (for example, the right side in Fig. 1 and Fig. 2 End) it is movable end, the second end of second switch terminal 2 can be motion.Wherein, the second contact 21 is located at second switch terminal 2 above-mentioned second end, thus, the second end of second switch terminal 2 can drive the second contact 21 to move, so that the second contact 21 Contacted with the first contact 11, or separated with the first contact 11.

First switch terminal 1 and second switch terminal 2 are suitable to (for example, by way of wire 9) and are connected to pressure means For example in the heater circuit (not shown) of electric pressure cooking saucepan, the heater circuit includes heater.When pressure means are for example electric When pressure cooker is normally used, the first contact 11 remains and contacts that heater circuit is often turned on the second contact 21, heater work Make, heated with to food in pressure means 200 etc..

Alternatively, the outer surface of the first contact 11 and the second contact 21 can be collectively formed by cambered surface and plane respectively, should Plane is located at the top of the first contact 11 and the second contact 21, thus, due to connecing between the first contact 11 and the second contact 21 Touch as face contacts, contact area is big so that the first contact 11 is contacted well, so as to ensure that heater circuit with the second contact 21 Reliability.Certainly, the sphere that the outer surface of the first contact 11 and the second contact 21 can also be formed as outwardly is (not shown Go out).

Touch device is disposed adjacent with second switch terminal 2, for example, as depicted in figs. 1 and 2, touch device is located at second The side (for example, the downside in Fig. 1 and Fig. 2) away from first switch terminal 1 of switch terminal 2.Touch device is in normal conditions Do not contacted with second switch terminal 2 under (for example, when the second contact 21 is located at contact position).Touch device is configured to when environment pressure When power reaches predetermined pressure, touch second switch terminal 2 and make the second contact 21 from the contact position often contacted with the first contact 11 (as shown in Figure 1) moves to the open position (as shown in Figure 2) for the first contact 11 separate.Here, it is necessary to explanation, has served as Pressure protection switch 100 is used for when on pressure means such as electric pressure cooking saucepan, and it is for example electric that " environmental pressure " can be understood as pressure means Pressure in pressure cooker.Touch device is provided with locking system 4.

For example, when the pressure in pressure means such as electric pressure cooking saucepan reaches predetermined pressure, touch device and second switch Terminal 2 is contacted and touching second switch terminal 2 makes the second contact 21 be separated (do not contact) with the first contact 11, so that heating Circuit is disconnected, and heater is not worked, and the pressure in pressure means such as electric pressure cooking saucepan can be reduced gradually, be realized to pressure The protection of utensil such as electric pressure cooking saucepan, and do not discharge the gas of HTHP due to pressure means such as electric pressure cooking saucepan, from without User can be damaged.

Alternatively, predetermined pressure is P, and P meets：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.

The connected entrance 71 communicated with external environment condition is formed with Switch main body 7, for example, as depicted in figs. 1 and 2, connected entrance 71 bottoms that can be formed in Switch main body 7.It is " outside when overvoltage protection switch 100 is used for pressure means such as electric pressure cooking saucepan Environment " is referred to inside pressure means such as electric pressure cooking saucepan.Wherein locking fixed seat 5 is fixed in Switch main body 7.Thus, lead to Crossing setting can accommodate first switch terminal 1, second switch terminal 2, touch device, locking system 4 and locking fixed seat 5 Switch main body 7, improves the integration of overvoltage protection switch 100.

Sealing device 8 is located in Switch main body 7, and sealing device 8 is connected with touch pole 3, and sealing device 8 is configured to by even The environmental pressure that port 71 applies is when reaching predetermined pressure, sealing device 8 drives touch pole 3 to touch second switch terminal 2 makes the Two contacts 21 move to the open position for the first contact 11 separate from the contact position with the first often contact of contact 11.Thus, By setting sealing device 8, sealing device 8 can be by the inside of Switch main body 7 and pressure means such as electric pressure cooking saucepan internal insulation Open, make that there is pressure difference between the inside of Switch main body 7 and pressure means such as electric pressure cooking saucepan inside, so that when pressure means are for example electric During the overvoltage of pressure cooker internal abnormality, sealing device 8 can promote touch pole 3 to move up to touch second in the presence of pressure difference Switch terminal 2.

Lock groove 51 is formed with locking fixed seat 5, wherein locking system 4 is suitable to coordinate with lock groove 51 and is touched with locking Device makes the second contact 21 be maintained at open position.Thus, when touch device is acted, locking system 4 can be fixed with locking Lock groove 51 on seat 5 coordinates, so as to touch device is locked at into the position that the second contact 21 and the first contact 11 disconnect.Example Such as, cannot Self-resetting, i.e. the first contact after the first use of overvoltage protection switch 100 (the first contact 11 and the second contact 21 disconnect) 11 and second contact 21 will not again contact and turn on heater circuit, so as to increased what pressure means such as electric pressure cooking saucepan was used Security.

Alternatively, first switch terminal 1 and second switch terminal 2 are each provided in locking fixed seat 5.Certainly, first switch Terminal 1 and second switch terminal 2 may be also secured on the inwall of Switch main body 7 hereinafter, or be directly arranged in pressure means For example on electric pressure cooking saucepan (not shown).It is understood that the specific setting of first switch terminal 1 and second switch terminal 2 Position can specifically be set according to actual requirement, preferably to meet actual requirement.

Touch device includes touching the touch pole 3 of second switch terminal 2, for example, as depicted in figs. 1 and 2, touch pole 3 Can be moved up and down relative to second switch terminal 2, when touch pole 3 is located at the position shown in Fig. 1, the second contact 21 and first is touched Point 11 remains contact, and when the pressure anomaly in pressure means such as electric pressure cooking saucepan, touch pole 3 can be moved up and pushed away Dynamic second switch terminal 2, makes the second contact 21 be disconnected with the first contact 11, realizes power-off protection.

The holding tank 31 opened wide towards locking fixed seat 5 is formed with touch pole 3, wherein locking system 4 movably sets In holding tank 31, locking system 4 is suitable to stretch out holding tank 31 and lock groove 51 coordinates so that the second contact 21 is maintained at disconnection Position.Thus, by the cooperation of locking system 4 and lock groove 51, touch pole 3 can be maintained at shake-up second switch terminal 2 Position (position i.e. as shown in Figure 2), the second contact 21 can be maintained at released state with the first contact 11, without because Pressure oscillation in pressure means such as electric pressure cooking saucepan makes the second contact 21 be contacted with the first contact 11 again.

Overvoltage protection switch 100 according to the utility model embodiment, simple structure, low cost.Work as overvoltage protection switch 100 when being used for pressure means such as electric pressure cooking saucepan, by setting touch device, locking system 4 and lock with lock groove 51 Only fixed seat 5, when the pressure in pressure means such as electric pressure cooking saucepan reaches predetermined pressure, the first contact 11 and the second contact 21 Disconnect, the heater circuit with first switch terminal 1 and second switch terminal 2 of pressure means such as electric pressure cooking saucepan can be made to break Open, such that it is able to effectively realize it is abnormal it is over-pressed under power-off protection, and, can be with when the second contact 21 is located at open position Second contact 21 is maintained at open position, is not in the situation that heater continues to heat, increased pressure means for example The safety in utilization of electric pressure cooking saucepan.In addition, by setting Switch main body 7, can be by first switch terminal 1, second switch terminal 2nd, touch device, locking fixed seat 5 and sealing device 8 are integrated in Switch main body 7 so that overvoltage protection switch 100 is one Global facility, when using, conveniently and quickly can be attached to pressure means such as electric pressure cooking saucepan by overvoltage protection switch 100, Improve efficiency of assembling.By setting sealing device 8, the reliability of the action of overvoltage protection switch 100 can be effectively ensured.

Specifically, referring to Figures 1 and 2, locking system 4 includes：Lock piece 41 and elastic component 42, lock piece 41 and elastic component 42 are each provided in holding tank 31, and elastic component 42 is located at the inwall (for example, the left side wall in Fig. 1 and Fig. 2) and locking of holding tank 31 Between part 41, the direction that elastic component 42 is configured to be directed away from the central axis of touch pole 3 often promotes lock piece 41.When the second contact 21 be located at contact position when, as shown in figure 1, lock piece 41 in the presence of elastic component 42 with locking fixed seat 5 keep only support, this When lock groove 51 be located at locking system 4 top, during touch pole 3 is moved up, locking system 4 is relative to lock groove 51 move up, when touch pole 3 is moved to holding tank 31 and lock groove 51 substantially left and right is alignd when, lock piece 41 will be in elastic component Stretched into the presence of 42 in lock groove 51, now the second contact 21 disconnects with the first contact 11, so that pressure means are for example The heater circuit of electric pressure cooking saucepan disconnects, and the pressure in electric pressure cooking saucepan will not continue to act on touch pole 3, i.e., touch pole 3 will not Continue to move up, and because the cooperation of lock piece 41 and lock groove 51, touch pole 3 may remain in the position, make second to touch Point 21 is off all the time with the first contact 11, thus, effectively increases pressure protection, increased pressure means for example electric The security of pressure cooker.Alternatively, elastic component 42 is spring, but not limited to this.Further, the neighbouring touch pole of lock piece 41 One end of 3 central axis forms fluted, and one end of elastic component 42 is adapted to extend into the groove and is fixed on the inwall of groove, To reduce taking up room for whole locking system 4.

Further, pilot hole 52 is formed with locking fixed seat 5, touch pole 3 is located in pilot hole 52, and touch pole 3 First end (for example, the upper end in Fig. 1 and Fig. 2) be suitable to stretch out pilot hole 52 and touch second switch terminal 2, pilot hole 52 pairs is touched Lever 3 has guide effect, to ensure the accuracy that touch pole 3 is moved.Alternatively, the bearing of trend of touch pole 3 is opened with second Plane where closing terminal 2 is vertical, as shown in figure 1, thus, it is possible to preferably touching second switch terminal 2 makes the second contact 21 Separated with the first contact 11.Wherein lock groove 51 is connected with pilot hole 52, and as depicted in figs. 1 and 2, lock groove 51 can be by locking A part for the upper surface of fixed seat 5 is downwardly concaved to be formed, and lock groove 51 can be formed around the ring of the setting of pilot hole 52 Shape groove is simultaneously connected with pilot hole 52.

Alternatively, as depicted in figs. 1 and 2, the bearing of trend of holding tank 31 is vertical with the bearing of trend of pilot hole 52, so that Lock piece 41 preferably can coordinate with lock groove 51.

As depicted in figs. 1 and 2, the periphery wall at the second end of touch pole 3 is provided with the backstop muscle 32 for stretching out, and overvoltage is protected Shield switch 100 is further included：Dynamic clamping head and quiet clamping head 6, dynamic clamping head and quiet clamping head 6 stops the inwall for being against pilot hole 52 (for example, Fig. 1 and Fig. 2 In roof) and backstop muscle 32 between, the direction that dynamic clamping head and quiet clamping head 6 is configured to be directed away from second switch terminal 2 often promotes and touches Lever 3.For example, dynamic clamping head and quiet clamping head 6 can be spring, spring is set in outside touch pole 3, and spring two ends respectively with pilot hole 52 roof and backstop muscle 32 is only supported, often to promote touch pole 3 downwards, i.e., when the pressure in pressure means such as electric pressure cooking saucepan is small When predetermined pressure, touch pole 3 can reset under the action of the spring.

Wherein, the second end of touch pole 3 is connected with sealing device 8.For example, as depicted in figs. 1 and 2, shape on sealing device 8 It is suitable to be fixed in mounting groove into above-mentioned second end for having mounting groove, touch pole 3.Sealing device 8 is configured to by connected entrance 71 When the environmental pressure (for example, pressure means such as electric pressure cooking saucepan internal pressure) of applying reaches predetermined pressure, sealing device 8 drives Touch pole 3 touches second switch terminal 2.Sealing device 8 is used to separate the inside of Switch main body 7 and connected entrance 71, for example, with pressure Power utensil such as electric pressure cooking saucepan internal insulation is opened, so that between the inside of Switch main body 7 and pressure means such as electric pressure cooking saucepan inside With pressure difference, so as to when pressure means such as electric pressure cooking saucepan internal abnormality is over-pressed, sealing device 8 can be in the presence of pressure difference Touch pole 3 is promoted to move up to touch second switch terminal 2.

Alternatively, sealing device 8 is diaphragm seal, and when the second contact 21 is located at contact position, sealing device 8 is to connected entrance 71 bloat to block connected entrance 71, for example, as shown in figure 1, the edge of diaphragm seal and being played for blocking the bottom of connected entrance 71 The effect of two-layer sealing, is effectively guaranteed the reliability of touch device action.It is close when the second contact 21 is located at open position The direction that seal apparatus 8 are directed away from connected entrance 71 bloats (as shown in Figure 2).Now sealing device 8 can be resilient using tool Material is made, and can further improve the sealing effectiveness of sealing device 8.

Alternatively, the pressure lifting surface area that environmental pressure acts on sealing device 8 is S, and wherein S meets：1mm²≤S≤ 100mm².For example, when overvoltage protection switch 100 is used for pressure means such as electric pressure cooking saucepan, S is that the pressure in apparatus body is made With the pressure lifting surface area on sealing device 8.

Overvoltage protection switch 100 according to 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 realizes overvoltage protection.This kind of principle of overvoltage protection switch 100 Be steam in pressure means such as electric pressure cooking saucepan by the access switch body 7 of connected entrance 71, when steam pressure is multiple more than elasticity During the elastic force of the position such as spring of part 6, sealing device 8 is driven on steam top, drives touch pole 3 to move, and touches second switch terminal 2, the Can be flicked upwards after the stress of two switch terminal 2 so that the second contact 21 of second switch terminal 2 with second switch terminal 2 to Upper movement, separates the first contact 11 and the second contact 21, after touch pole 3 is moved upwards, when touch pole 3 rises to appearance thereon The lock groove 51 received in groove 31 and locking fixed seat 5 substantially just pair when, the lock piece 41 in holding tank 31 is ordered about by elastic component 42 To snap in lock groove 51, to block touch pole 3, touch pole 3 can not reset.Because touch pole 3 is unable to return, second switch end Son 2 can not return back to the position that the second contact 21 contacts with the first contact 11, can be effectively increased pressure protection, increase pressure means The security of such as electric pressure cooking saucepan, it is more safe and reliable compared with traditional mechanical pressure relief.

Pressure means such as electric pressure cooking saucepan according to 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 is the pressure in apparatus body, the touch device when the pressure in apparatus body reaches predetermined pressure Motion upwards touches second switch terminal 2, while locking system 4 can be by touch device locking so that the second contact 21 is maintained at Open position.For example, specifically, apparatus body includes pot and lid, the top of pot is opened wide, and cover cap is located at pot Top, wherein, overvoltage protection switch 100 is located on lid, and positioned at the center of lid.Alternatively, overvoltage protection switch 100 is erected Straight to set, now connected entrance 71 can directly be communicated with pot nside, and the pressure in pot can directly be made by connected entrance 71 Used in the bottom of touch device.Seal is provided between pot and lid, to ensure the sealing between pot and lid.

Pressure means such as electric pressure cooking saucepan according to the utility model embodiment, can effectively provide pressure anomaly power-off and protect Shield, and reduce cost.

Other compositions of pressure means such as electric pressure cooking saucepan according to the utility model embodiment and operation are 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 are described Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or Person's feature can in an appropriate manner be combined in one or more any 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： In the case where principle of the present utility model and objective is not departed from various changes, modification, replacement can be carried out to these embodiments And modification, scope of the present utility model limits by claim and its equivalent.

Claims (9)

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

First switch terminal, the first switch terminal has the first contact；

Second switch terminal, the second switch terminal has the second contact, and second contact often connects with first contact Touch；

Touch device, the touch device is disposed adjacent with the second switch terminal, and the touch device includes that institute can be touched The touch pole of second switch terminal is stated, the touch device is provided with locking system；

Switch main body, is formed with the connected entrance communicated with external environment condition on the Switch main body, wherein the first switch terminal, The second switch terminal and the touch device are each provided in the Switch main body；

Sealing device, the sealing device is located in the Switch main body, and the sealing device is connected with the touch pole, described The environmental pressure that sealing device is configured to apply by the connected entrance reaches sealing device drive during predetermined pressure The touch pole touches the second switch terminal makes second contact from the contact position often contacted with first contact Move to the open position with first contact separation；

Locking fixed seat, lock groove is formed with the locking fixed seat, wherein being formed with the touch pole towards the lock The holding tank that only fixed seat is opened wide, the locking system is movably arranged in the holding tank, and the locking system is suitable to stretch Go out the holding tank makes second contact be maintained at the disconnection position with lock groove cooperation with touch device described in locking Put.

2. overvoltage protection switch according to claim 1, it is characterised in that the locking system includes：

Lock piece, the lock piece is located in the holding tank；With

Elastic component, the elastic component is located between the inwall of the holding tank and the lock piece, and the elastic component is configured to court The lock piece is often promoted to the direction away from the touch pole central axis.

3. overvoltage protection switch according to claim 1, it is characterised in that be formed with guiding in the locking fixed seat Hole, the touch pole is located in the pilot hole, and the first end of the touch pole is suitable to stretch out described in the pilot hole shake-up Second switch terminal, the second end of the touch pole is connected with the sealing device, wherein the lock groove and the pilot hole Connection.

4. overvoltage protection switch according to claim 3, it is characterised in that on the periphery wall at the second end of the touch pole The backstop muscle for stretching out is provided with,

Further include：

Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head is stopped and being against between the inwall of the pilot hole and the backstop muscle, the elasticity The direction that return unit is configured to be directed away from the second switch terminal often promotes the touch pole.

5. overvoltage protection switch according to claim 1, it is characterised in that the first switch terminal and described second is opened Terminal is closed to be located in the locking fixed seat.

6. overvoltage protection switch according to claim 1, it is characterised in that the sealing device is diaphragm seal, when described The sealing device is bloated to block the connected entrance, when described to the connected entrance when second contact is located at the contact position The sealing device is directed away from the direction of the connected entrance and bloats when second contact is located at the open position.

7. overvoltage protection switch according to claim 1, it is characterised in that the predetermined pressure is P, the P meets： 140kPa≤P≤200kPa。

8. overvoltage protection switch according to claim 1, it is characterised in that the environmental pressure acts on the sealing dress The pressure lifting surface area put is S, wherein the S meets：1mm²≤S≤100mm²。

9. a kind of pressure means, it is characterised in that including the overvoltage protection switch according to any one of claim 1-8.