CN1339168A - Improvements relating to thermal controls - Google Patents

Abstract

A steam control for switching off the heating element of a water boiling vessel comprises a snap-acting bimetal arranged to determine the condition of an overcentre mechanism via a push-rod. The overcentre mechanism comprises a trip lever and a stressed spring arranged mechanically in series between spaced-apart abutment. To avoid loading the bimetal by the push-rod and the overcentre mechanism as the bimetal approaches its operating temperature, the push-rod is made relatively short so that it does not apply force to the overcentre mechanism, and correspondingly load the bimetal, until after the bimetal itself has moved overcentre. The short push-rod brings about the problem of resetting the bimetal by manual operation trip lever. The trip lever is movable for resetting the bimetal beyond its normal cold condition rest position against spring bias, the additional trip lever movement providing additional movement to the push-rod for resetting the bimetal.

Description

Improvements related to thermal controls

field of invention

The present invention relates to improvements in thermal control devices which have particular, though not exclusive, application to thermal control devices of the type used in electrically heated boiling water vessels, such as domestic kettles and kettles with handles, and For example, when the steam produced by the boiling of water in the container can be detected by the bimetallic actuator, the actuator changes state, causing the operation of the eccentric clutch lever, thereby opening a set of switch contacts, interrupting the operation of this kind of Power supply for vessel heating elements. Thermal control devices of the type described above are well known and are generally referred to as "steam control devices".

Background of the invention

The invention will be described below with reference to the steam control device described in GB-A-2 331 848, but the invention is also applicable to other steam control devices in which the eccentric mechanical state is determined by a momentary bimetallic actuator, such as GB -As described in A-2 248 520, GB-A-2 218 029 and GB-A-1 470 336.

The control device described in the inventor's UK patent application No. 9811400.2 (hereinafter referred to as the Z5 steam control device) comprises a disc-shaped plate-shaped momentary bimetal actuator with a generally U-shaped The notch is used to release a tongue from this plate. The plate's dished shape allows it to move between two opposing curved structures under instantaneous action. Bimetallic actuators of this type are well known and, when fitted into the control unit by the periphery of the dish, give the tongue freedom as the dish moves between its two opposing dishes. The ends provide a significant amount of movement. In the Z5 control, the bimetal plate is mounted on the molded cover of the control in such a way that the free end of the tongue cooperates with the eccentric via a push rod. The eccentric mechanism consists of a clutch lever and a spring mounted in series between separate struts in the body of the control unit, and the eccentric mechanism can be momentarily activated on either side of an unstable central position. movement between stable positions. In this Z5 control device, the above-mentioned spring has integrated extensions carrying contacts, these extensions move with the spring when the eccentric moves between two stable positions, relative to the fixed switch contacts or acting as provided in the control device. Contact or break contact, but in other structural forms, the clutch lever has a switch operation part related to its position, which determines the state of a group of switch contacts (disconnected or engaged) depending on the state of the eccentric structure.

In the operation of the above-mentioned Z5 steam control device, in the container equipped with this control device, the steam generated when the water boils impacts the bimetal actuator (hereinafter referred to as the bimetal) and causes it to switch to its In the relative bending state, this movement causes the free end of the plate tongue to move inwards relative to the main body of the control device, causing the push rod to collide with the clutch lever and push inward, causing the clutch lever to rotate, allowing the eccentric mechanism to enter and pass Its central unstable position snaps onto another stable position. The spring extension follows the movement of the eccentric. The contact at the upper end of the spring extension then disengages from the fixed contact in the control unit, thereby interrupting the power supplied by the control unit to the heating element of the container. In order to restore the control device, the clutch lever must be manually operated to return the eccentric mechanism to its original state. This movement is also used to press the push rod to push the tongue of the bimetal to its original cooling state. position occupied, thereby attempting to restore the bimetal. Naturally, the bimetal will try to resist this restoration while its temperature has not cooled.

Applicants have discovered that the length of the push rod is critical to the operation of the Z5 controls. When the push rod is too short, the amount of movement available through the bimetal may not be sufficient for the eccentric to operate reliably when the bimetal is subjected to steam from boiling water in the container. Furthermore, the amount of motion available from the eccentric mechanism may not be sufficient to ensure recovery of the bimetal before its temperature has dropped significantly. On the other hand, if the push rod is too long, the response of the bimetal to an increase in temperature will be unduly dependent on the mechanical loading of the bimetal due to the push rod and the eccentric mechanism, at least as the bimetal approaches its snap-in point. This will raise the snap-fit temperature of the bimetal to such an extent that the operation of the controls cannot be ensured, especially when the vessel is operating at high altitudes where the boiling point of water is below 100°C.

The above-mentioned difficulties can be solved by a suitable design of the working parts of the control device, but this is at the expense of high costs. If the bimetal must be selected such that its operating temperature is limited to 10°C and the length of the push rod must be controlled to an accuracy better than 0.1 mm, the cost will be significantly increased.

Purpose and summary of the present invention

In view of the above, the main object of the present invention is to solve, at least mostly solve, the above-mentioned problems.

The invention provides a thermal response control device. It includes a momentary bimetallic actuator configured to determine the state of an eccentric mechanism arranged such that the eccentric mechanism does not or does not significantly load the movement of the bimetallic actuator from an initial cooling state. to and through its intermediate unstable position in response to an increase in temperature.

Preferably, the eccentric mechanism is movable between first and second, cold and hot positions in response to actuation of said bimetallic actuator, and in order to return the bimetallic actuator to its cooled state, a Hand-operating the eccentric moves it out of its cold position in the direction from its hot position to its cold position against the biasing action of the spring.

According to the typical embodiments of the present invention described below, the length or effective length of the force transmission member acting between the bimetal and the eccentric structure, such as the push rod, can be selected so that the operating temperature of the bimetal will not be affected by the push rod and its associated eccentricity. The effect of the mechanism on loading the bimetal until the bimetal has moved to and through its unstable center position, considered from the point of view of restoring the bimetal, by providing additional restoring motion in the eccentric mechanism against the spring The deflection, the corresponding shortening of the push rod length is suitable.

In the control device constructed according to the principle of the present invention, the clutch lever of the eccentric mechanism has two free rest positions corresponding to the two stable positions of the eccentric mechanism. At the same time, an elastic stop is also provided to limit the movement of the clutch lever from its working (hot) position to and through its reset (cold) position and into a third unstable position through its reset (cold) position, the above The elastic stop will return the clutch lever to its reset (cold) position when the restoring force is released. From the user's point of view, the container with this control device should be equipped with an on/off button on the clutch lever to be manually operated by the user, and during work, this button should be restored after the container boils and automatically cut off the power. The user will need to push the button from its "off" position to the "on" position as is traditionally the case, but there will be little resistance to the final movement of the button, and when the manual operating force is released, this The button will spring back slightly, but the user will hardly notice the difference.

The above-mentioned elastic stopper can be provided in any convenient way, and several typical arrangements will be described below, that is, one is to define the stopper by the cooperation of the pillar in the switch main body and the spring member of the eccentric mechanism, and the other One is by a separate spring combined with a trip lever to perform a similar function, the other is by releasing a resilient tongue from the body molding of the control in much the same way that a tongue is released from a bimetal Define this stopper. In yet another embodiment, an intermediate piece is provided between the C-shaped spring and the trip lever, which is rotatable and has a part that acts as a push rod.

The above and other features of the present invention are set forth in the appended claims, which, together with advantages of the present invention, will be apparent from a study of the following detailed description of exemplary embodiments given with reference to the accompanying drawings.

Description of drawings

Figures 1 and 2 are side views, partly shown in dashed lines, of a first embodiment of the steam control device of the present invention, the embodiment shown in Figure 1 in its rest position with its contacts closed, and Figure 2 showing It is the clutch lever of this embodiment that can be pushed forward to effectively augment the movement of the pushrod to restore the bimetal.

Figures 3, 4 and 5 are cross-sectional side views of a second embodiment similar to the first embodiment, Figure 3 showing the "on" (cold) state of this embodiment, and Figure 4 showing the "off" (hot) state And Fig. 5 shows the forced recovery state.

Figures 6 to 9 illustrate the third embodiment, Figure 6 shows this embodiment in the contact closed rest position, Figure 7 is similar to Figure 6 but shows that the clutch lever can be pushed forward to effectively increase the force of the push rod. Figure 8 is a perspective view of the molded plastic body part of this embodiment, showing that an elastic part is loosely released therefrom; and Figure 9 is a perspective view of the three-dimensional part of Figure 8 viewed from different directions.

Figures 10 to 21 show the fourth embodiment, and Figures 10 to 13 are respectively a cross-sectional side view (Figure 10), an upper perspective view (Figure 11), a lower perspective view (Figure 12) and a lower perspective view (Figure 12) of this embodiment. The enlarged view of the part marked by C (Fig. 13), all of them show the situation in the "on" (contact closed) state; Fig. 14 to 17 are similar figures, and all of them are in the forced recovery state Situation; Figures 18-21 are similar figures, all of which are shown are in the situation of "off" (contact disconnection) state.

Detailed description of the embodiment

The embodiment of the present invention described below is specifically described in GB-A-2 331 848, and is used for the modification of the steam switch of a kettle or a kettle with a handle. It is only to provide an understanding of the present invention, and specific details will be added. Enough said. For a more detailed understanding of the structure of these embodiments, reference can be made to GB-A-2 331 848.

Referring to Figures 1 and 2, the switch shown therein comprises an over-centre mechanism consisting of a spring 2 and trip lever 3 supported by a molded plastic body 1 between spaced legs 4 and 5 in mechanical series with each other. The spring 2 is E-shaped, as described in more detail in GB-A-2 331848, which has the form of a C-shaped spring extending between the elongated sides 7 of the movable contact 8 carrying the switch at its free ends Middleware6. The movable contact 8 cooperates with the fixed contact 9 provided at the metal terminal portion 10 of the switch during the switch operation.

A push rod 11 is located within a bore formed in the body 1 of the switch and cooperates with a snap-acting bimetallic switch actuator (not shown) to determine the state of the over-center mechanism. As is well known, the snap-action bimetallic actuator is a bimetallic, generally disk-shaped structure which is movable between two stable positions on opposite sides of an intermediate unstable position. Specifically, the push rod 11 moves in the hole in which it is located according to the state of the bimetal, this push rod as shown abuts against the bottom surface of the clutch lever 3, due to the change of shape of the bimetal switch actuator When the push rod 11 is pushed up (as shown in the figure), the clutch lever rotates clockwise around the pillar 5. In use, under the impact of steam, it changes from its cold state to its hot state under instantaneous action and approximately predetermined temperature . The clockwise rotation of the clutch lever 3 causes the eccentric mechanism to move to and through its central unstable position with the momentary action and enter its contact open state. This movement causes the elongated side part 7 of the spring 2 to go around the post 4 in a counterclockwise direction. At the same time, the movable contact 8 is disconnected from the fixed contact 9.

In order to make the switch reset from its cold, contact closed state to its hot contact open state, and also to make this switch manually operable, an operating button 12 is provided on the clutch lever 3 . When the switch is to be restored, the operating knob 12 is moved in the direction of the arrow shown in FIG. 2 to return the eccentric mechanism to its original contact closed position. The restoring counterclockwise movement of the clutch lever 3 pushes down the push rod 11 and this movement is used to restore the bimetal. According to the principle of the present invention, in this embodiment, the length of the push rod 11 is much shorter than the layout in the traditional structure, and it is just smaller than the lower side of the clutch lever 3 where the push rod abuts against during the switch operation and just moved to The distance between the actuating parts of the bimetal at the eccentricity between its relative dish-shaped structures. Relying on this layout, it can be ensured that the switching action of the bimetal will not be loaded by the push rod and the eccentric mechanism, so as to affect (increase) the working temperature of the bimetal. That is to say, the bimetal has already moved to and passed its intermediate position at the moment when it must operate the eccentric via the push rod, although it has not yet completed its movement.

Assuming that the push rod 11 has only a limited length, in the cold state of the switch, it is necessary to make the clutch lever 3 rotate counterclockwise to its free rest position, so that the depressed push rod can push the instantaneous bimetal eccentric mechanism to promote to restore it. In the embodiment shown in Figures 1 and 2, this additional movement is achieved by means of the geometry of the trip lever 3 with a strut 13 which fits against the molded body 1 and limits the movement of the trip lever 3. Go counterclockwise to the range that can be turned in the center. As shown in Figure 1, the struts 13 are separated from the molded body 1 when the eccentric structure is in its free cold (low temperature) state. When the eccentric mechanism is in its free cold state, as shown in Fig. 1, the C-shaped spring member 6 abuts against the surface 14 of the molded body 1, which turns the trip lever counterclockwise in order to reset the switch. Prompting the strut 13 to contact the body 1 as shown in FIG. 2 provides a force that causes the clutch lever to return to its free cold state. In this way, when the clutch lever 3 is released by the manual recovery operation, it will return to its free position by the elastic force of the C-shaped spring member 6. The same as explained before, the bimetal will not be pushed by the push rod and the eccentric mechanism. Loading, so as to ensure its operating temperature.

Figures 3-5 show a second embodiment of the invention which is similar in many respects to the first embodiment. The same reference numerals are used in FIGS. 3-5 to denote the same or similar components in FIGS. 1 and 2 . The main difference between the first and second embodiments is that the underside of the clutch lever 3 of the second embodiment is provided with a spring 20 which acts as a C-shaped spring on the surface 14 of the molded body 1 in the first embodiment 6 The role of the bottom. The right end of the spring 20 (as shown) is rigidly coupled to the molded trip lever so that relative movement between them is impossible. The left end of the spring 20 rests on a ridge 21 on the underside of the trip lever 3, giving an exact known position and acting as a rotational stop when the trip lever is moved to its "on" position. This spring is shaped as it is positioned so that it always exerts a force on the ridge that is high enough to give the trip lever with a sure feeling. Figures 3, 4 and 5 illustrate three possible positions of the clutch lever. In the "on" position shown in Figure 3, the trip lever rests on the bracket 22, which is acted upon by the spring 20, and the push rod 11 has the correct geometry to work with it when the bimetal 16 is in operation. . In the forced recovery state shown in FIG. 5 , the clutch lever resists the force of the spring 20 stopped on the bracket 22 and rotates counterclockwise. The spring 20 is then lifted away from its ridge 21 and the push rod 11 is pushed towards the bimetal 16 to ensure its return. When the force on the clutch lever is removed, it returns to the "on" position. In the "off" position shown in Figure 4, the clutch lever 3 is rotated clockwise, the spring 20 remains on its ridge 21 and the contacts are open. By selecting the force between the spring 20 and its support ridge 21, a reliable "on" position can be provided, which can be moved to the positive return position by applying a small additional force, which is generally the case when the kettle is switched on by the user. go unnoticed.

In the third embodiment of the present invention shown in Figs. 6-9, the same reference numerals are still used to denote the same or similar components as in the previous embodiments. Referring first to Figures 6 and 7, it is shown that the molded body 1 of the switch and the eccentric mechanism formed by the spring 2, the clutch lever 3 and the push rod 11 are assembled into the module outer body 15, which is like the above-mentioned GB-A- 2 331 848, proposes the assembly of a momentary bimetallic switch actuator 16 in the form of a disc-shaped circular plate with a tongue 17 released therefrom, the tongue The free end of 17 is used to actuate push rod 11 when the bimetal changes between its two oppositely curved configurations. As in the case of the previous embodiments, the trip lever 3 is formed together with the strut 13, but in this embodiment the strut 13 cooperates with a plastic spring member 18 released from the bottom surface of the inner molded body 1 of the temperature control device , and as shown in FIG. 7, the range of its possible movement is limited by the bottom side of the molded outer body portion 15.

8 and 9 are perspective views from above and below of the molded inner body of the switch of FIGS. The lower tongue is formed and is capable of bending by an amount that can be precisely determined by the bottom surface of the outer body 15 when the inner and outer body parts are assembled together.

The functions of the embodiments in FIGS. 6-9 are the same as those of the preceding embodiments, except that the elastic force of the C-shaped spring element in the first embodiment and the elastic force of the spring 20 in the second embodiment are replaced by the elastic force of the spring element 18 . Figure 6 shows the eccentric in its free rest position, while Figure 7 shows the clutch lever 12 rotating counterclockwise, thereby causing the spring member 18 to press down into engagement with the bottom surface of the molded outer body 15, thereby limiting The range of counterclockwise rotation of the clutch lever.

Figures 10 to 21 illustrate a fourth embodiment, wherein as far as possible the same reference numerals as used in the drawings of the previous embodiments are still used in Figures 10 to 21 to designate the same or similar parts. The fourth embodiment is different from the previous embodiments mainly in that it adopts an intermediate piece 30 between the C-shaped spring member 6 and the clutch lever 3, which is formed to engage with the corresponding end of the C-shaped spring 6 There is a V-shaped groove 31 on one side and a V-shaped protrusion 32 on the other side. This V-shaped protrusion 32 is accommodated in the V-shaped groove 33 of the clutch lever 3. The size allows the intermediate piece 30 to perform limited rotation relative to the clutch lever 3. The middle piece 30 also has first and second depending nose portions 34 and 35 which, in the central cross-section shown in FIGS. One of the two arms of the inverted U shape defined by the shape part 34 passes through the hole 36 in the front end of the clutch lever 3 (the left end shown in the figure), and interacts with the bimetallic actuator 16 in a push rod manner downwards, while the nose The other arm portion defined by the shaped portion 35 is outside the above-mentioned hole and acts as a bracket for the movement of this intermediate piece. The operation of this embodiment can be understood from the following description.

Referring first to Figures 10-13, they illustrate the embodiment in its "on" position. The role of the C-shaped spring 6 is to urge the auxiliary molding 30 to rotate counterclockwise, due to the relative positions of the three fulcrums (a, b, c). The result is that the nose 34 of the auxiliary molding 30 moves upwardly away from the bimetal 16, giving proper pushrod clearance for the breaking action of the bimetal. The bracket nose 35 of the auxiliary molding 30 acts as an elastic stop for the rotation of the clutch lever, and the shape of the two moldings 36, 3 ensures that their relative rotation is limited, by means of 37 The stops shown give their suitable geometry.

What Fig. 14～17 shows is when the clutch lever 3 moves counterclockwise and turns to beyond its normal " through " position, to ensure the "forced" recovery state of the recovery of the bimetal. At this point, the auxiliary molding 30 has turned clockwise against the force of the C-shaped spring 6, which causes its working nose 34 to move towards the bimetal 16 beyond the natural pushrod clearance position, The curvature that causes the bimetal to return to its cold state. This return rotation is limited by the front end of the clutch lever which fits into the molded chassis as shown. When the clutch lever is subsequently released, the clutch lever will turn slightly clockwise under the force of the C-shaped spring and get back to the "connected" state. The difference between these two positions relative to the rotation of the clutch lever and the auxiliary molding around the V-groove of the lever is small, resulting in downward movement of the V-groove, thereby reducing pushrod clearance. The direction of force of the C-shaped spring ensures that the rest position is the position corresponding to the "on" state.

Figures 18-21 show the situation of the "off" state, when the clutch lever 3 rotates clockwise and the force of the C-shaped spring 6 is transmitted through the auxiliary molding 30 which has no other effect in this position.

The invention has been described above with reference to specific embodiments, it being fully understood that these embodiments are exemplary and that modifications and changes may be readily made without departing from the spirit and scope of the appended claims. For example, in the third embodiment described later, the plastic spring in the main body of the device cooperates with the rigid clutch lever to provide elasticity in the recovery part of the clutch lever movement, but this plastic spring can also be completely arranged on the clutch lever A rigid portion in the molded body of the control unit may cooperate with the above, or even cooperating springs may be provided on each of the above two portions. Obviously, all spring arrangements of this type should feature a rigid stop to limit the amount of return movement that might be used for the clutch lever to ensure that the bimetal is not overstressed during the return operation. Another possibility, which has some advantages, is to make the push rod integral with the trip lever, which at least simplifies the assembly of the control device since no separate assembly of the push rod is required.

The control device with push rod integrally formed with the clutch lever in the bimetal working eccentric mechanism is basically the Strix U-Series control device described in WO-A-9 534 187 with reference to its accompanying drawings 15, 16A and 16B The boiling control part in. As far as it is concerned, the trip lever in this control is a molded plastic part mounted rotatably relative to a molded plastic chassis, and the trip lever is rotated in such a direction that the It is possible to limit the amount of movement of the pushrod used to restore the bimetal due to the coupling of the clutch lever to the chassis. The principles of the present invention are applicable to the above-mentioned structures, and for this purpose, for example, in the embodiments of FIGS. The elastic stop establishes the normal resting position of the clutch lever relative to the chassis and can be manually deformed to allow the shortened pushrod to return the bimetal. Although the present invention has been exemplified above with reference to the steam control device substantially as described in GB-A-2 331 848, the present invention is not limited to this control form but can have wider application.

It is also possible to make the clutch lever have an up-and-down movement effect. For this reason, a V-shaped groove on the clutch lever front end combined with the free end of the C-shaped spring member 6 and the rotating pillar 5 of the clutch lever can be provided with a pillar extending upwards. The internal moldings of the Alternatively, a downwardly extending strut may be provided on the trip lever or cooperating struts may be provided on the above-mentioned two parts. In the operation of the control in response to the detection of steam by the bimetal, the movement of the trip lever is independent of the up and down struts, but in the reset operation, this structure will allow this up and down motion to cause the trip lever to go around the struts. Swing forward (from right to left when observed in the figure), and leave the pillar 5 slightly against the effect of the C-shaped spring member 6 with its right end.

Finally, in the embodiment of Figures 1-9, if the control unit is used in the arrangement shown, the push rod does not significantly load the bimetal in the cold state of the control unit. It is very simple to make above-mentioned arrangement here, but not so in Fig. 10～21, for this reason, for example can make the head of push rod and the receiving structure in the clutch lever be combined loosely or use a weak spring Acts on the push rod so that the push rod remains separated from the bimetal in the normally cold state of the control device.

Claims (20)

1. thermally responsive control means, it comprises and being arranged to moving bimetallic actuator of the wink of deciding the eccentric stiffener state, and this layout makes this eccentric stiffener can or can not load the motion of bimetallic actuator significantly and moves on to and by the rising of the unstable position in the middle of it with response temperature from initial cold state.

2. thermally responsive control means as claimed in claim 1, it is characterized in that, described eccentric stiffener responds the action of this bimetallic actuator and can move between first and second is the two positions of h and c, and for this bimetallic actuator being reduced to its cold state, available hand makes the moving partially of this eccentric stiffener resistance spring, and extremely cold locality moves to its cold position along it from heat.

3. thermally responsive control as claimed in claim 2, it is characterized in that, include moving bimetallic actuator of the wink that between the settling position of two opposite sides, unstable position, centre, to move, this bimetallic actuator is arranged to can be by power transmission part moving along first direction, make eccentric stiffener in being between predetermined h and c position, to move under the predetermined temperature basically, described power transmission part then is arranged to can or can not load the temperature that moves to and be elevated to response by unstable position in the middle of it above-mentioned predetermined temperature of bimetallic actuator significantly, this eccentric stiffener of available manual manipulation simultaneously, so that this power transmission part is according to rightabout motion and allow bimetallic actuator restore, this eccentric stiffener has device and is used for revolting spring and moves partially and it is moved on to outside the home position simultaneously.

4. thermally responsive control as claimed in claim 3 is characterized in that, the effective length of described power transmission part less than bimetallic actuator and eccentric stiffener between the two, distance when eccentric stiffener is in its predetermined cold position between interactional parts.

5. thermally responsive control as claimed in claim 4, it is characterized in that, described power transmission part comprise can be in the hole of described control device body the push rod of motion vertically, the length of this push rod is not enough to the distance between the workpiece of bridging bimetallic actuator and eccentric stiffener when eccentric stiffener is in its cold state of being scheduled to.

6. thermally responsive control as claimed in claim 4, it is characterized in that, described power transmission part comprises an intermediate member of this eccentric stiffener, and this intermediate member can be revolted eccentric stiffener in eccentric stiffener spring is moving partially and carry out limited motion so that the bimetallic actuator reduction.

7. thermally responsive control as claimed in claim 6, it is characterized in that, described intermediate member has the part and the part that plays point action that play the push rod effect, this fulcrum is used for making described intermediate member to do lever-operated motion under the spring of the manual working of eccentric stiffener and resistance eccentric stiffener is moving partially, and this lever-operated motion reduces bimetallic actuator can move to outside its normal cold position by described putter component the time.

8. as the described thermally responsive control of above-mentioned each claim, it is characterized in that described eccentric stiffener comprises that machinery in series is installed in the spring and the trip(ping) lever of an intercolumniation that separates mutually.

9. thermally responsive control as claimed in claim 8 is characterized in that, described spring comprises C shape spring part.

10. thermally responsive control as claimed in claim 9, it is characterized in that, described spring is the spring of roughly E shape and form the center arm of this E shape spring and join with the parts side that is provided with travelling contact at its free end with described C shape spring part, these travelling contacts then in switching operations with described control device in set fixed contact collaborative work.

11., it is characterized in that described eccentric stiffener comprises that machinery in series is installed in the spring and the trip(ping) lever of an intercolumniation that separates mutually as the described thermally responsive control of above-mentioned each claim, the spring of described eccentric stiffener then provides described spring moving partially.

12., it is characterized in that described spring is moving partially to be what to be provided by the device outside the eccentric stiffener as each described thermally responsive control among the claim 1-10.

13. thermally responsive control as claimed in claim 12 is characterized in that, described eccentric stiffener comprises becoming the spring and the trip(ping) lever of machinery series connection, and another spring of trip(ping) lever associated then provides described spring moving partially therewith.

14. as each described thermally responsive control in the claim 1～10, it is characterized in that, described eccentric stiffener comprises becoming the spring and the trip(ping) lever of machinery series connection, this trip(ping) lever control device one body therewith then forms state with the mutual butt of elastic type, and state provides described spring moving partially thus.

15. thermally responsive control as claimed in claim 14 is characterized in that, described spring is moving partially to be by providing from this trip(ping) lever and/or from the elastic support that the body pine oil of this control device goes out.

16. as the described thermally responsive control of above-mentioned each claim, it is characterized in that, described bimetallic actuator comprises the dish-shaped bimetallic plate that can move with quick acting in two relative warp architectures, and described push rod not can to this bimetallic actuator from its cold state to its hot state when before it moves past a central unstable position to its loading.

17., it is characterized in that it is fit to and is assembled into as the responsive control device of steam as the described temperature-sensitive control piece of above-mentioned each claim.

18. thermally responsive control, substantially as in the specification with reference to as described in arbitrary accompanying drawing.

19. electric heating boiling water container includes the described thermally responsive control of above-mentioned each claim.

20. steam control device, be used to disconnect the boiling water container heating element, this steam control device comprises the bimetal piece that wink is moving, the latter is arranged to be used for determining by push rod the state of eccentric stiffener, this eccentric stiffener comprises that mechanical type in series is located at the trip(ping) lever of an intercolumniation that separates mutually and stressed spring, for exempting from this bimetal piece is that above-mentioned push rod and eccentric stiffener load when its working temperature of its convergence, this push rod relatively can not be applied to power on the eccentric stiffener than weak point, thereby correspondingly after having moved on to eccentric part already, this bimetal piece itself just this bimetal piece was loaded, said structure can also make the bimetal piece reduction by the manual operation trip(ping) lever, promptly by this movably trip(ping) lever make bimetal piece resistance spring moving partially and revert to outside its normal cold state resting position, the additional movement of this trip(ping) lever provides additional movement to make the bimetal piece recovery for described push rod.

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