CN1773643B - Thermostat - Google Patents
Thermostat Download PDFInfo
- Publication number
- CN1773643B CN1773643B CN 200510118627 CN200510118627A CN1773643B CN 1773643 B CN1773643 B CN 1773643B CN 200510118627 CN200510118627 CN 200510118627 CN 200510118627 A CN200510118627 A CN 200510118627A CN 1773643 B CN1773643 B CN 1773643B
- Authority
- CN
- China
- Prior art keywords
- rotating lever
- cam disc
- thermostat
- bossing
- lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
The present invention provides a thermostat for controlling the electric refrigerator or the like, capable of remaining knob torque moment steadily when forced cut-out operation and preventing setting temperature from variation after operating. The structure of the thermostat of the present invention has a knob shaft (33) having a cam board (34) rotated so that an L-shaped arm (30) connected to a lever (24) gets in contact with the projection (34a) of the cam plate at the forced turn-off position of the plate and the lever equipped with the L-shaped arm is rotated to the position where a switch (28) is forced to be turned off. In this structure, since the force acting on the L-shaped arm is directed in the same direction as the rotating direction of the lever with no lateral slide nor positional variation of a fulcrum (24a) of he lever, nor excessive force at the contact of the projection with the lever, fluctuation of a preset temperature is suppressed and rotational torque of the knob shaft is stabilized. Furthermore, the projection and the fulcrum of the lever can not be put on overgreat force, it can prevent setting temperature from variation, and the rotary torque moment of the knob shaft can also remain steadily.
Description
Technical field
The present invention relates to a kind of thermostat that switch is forced release mechanism that has.
Background technology
Existing refrigerator is often stopped its refrigerating function fully at cold district, only uses as the food preservation cabinet.In addition, because the relation that the space is set of refrigerator etc., do not pull up attaching plug sometimes specially specially yet, and just power supply is disconnected, so be provided with in the refrigerator that has be suitable for above-mentioned two kinds of situations, have a thermostat (example wherein can be opened clear 54-45980 number with reference to the Japanese patent gazette reality) of forcing release mechanism.
With reference to the accompanying drawings above-mentioned existing thermostat is described.
Fig. 5 is the sectional view of existing thermostat, and Fig. 6 is the vertical view of the cam body in the existing thermostat.As shown in Fig. 5, Fig. 6, be provided with in the existing thermostat: the variations in temperature of control unit is transformed into the temperature-sensing element 1 that pressure changes; The L type action plate 2 that withstands temperature-sensing element 1, rotates for fulcrum k with the axle; End, the other end that one end is fixed on the longitudinal edge 2b in the L type action plate is fixed on the spring 3 on the adjustment screw 4 that is screwed on the body c; One end and the action rod 5 that the longitudinal edge 2b of L type action plate combines, the other end withstands following contact panel 6; The contact panel 6 that one end is fixed on the terminal, the other end (free end) is provided with travelling contact 7; The fixed contact 8 that can come in contact/separate with travelling contact 7; On the negative camber of ring-type cam body 9, be provided with the cam 10 of curved surface B; And the rotation axis 11 that reaches the outside of body c.In the above-described configuration, when cam body 9 rotated, the B curved surface of cam 10 can withstand the upper end of the longitudinal edge 2b of L type action plate, and L type action plate 2 is slided along the B curved surface.
Operational circumstances to thermostat with above structure is described below.
When temperature in control unit rose, temperature-sensing element 1 expanded, and it serves as axle towards counterclockwise rotating that L type action plate 2 is desired with fulcrum k, and was resisted by (corresponding with design temperature) elastic force of adjusting the spring 3 that screw 4 sets.When the control unit temperature surpassed design temperature, action rod 5 will move to the left of figure, pushes contact panel 6, by two sheet metals and flexure strip therebetween travelling contact 7 was connected with fixed contact 8, thereby made the power circuit closure.
Next, when the temperature in the control unit descended, temperature-sensing element 1 shrank; L type action plate 2 is that fulcrum k rotates toward the clockwise direction with the axle under the tension of spring 3, and the pressure of excellent 5 docking point plates 6 of moving will alleviate.When reaching set point of temperature, contact panel 6 will begin backward rotation, by two sheet metals and flexure strip therebetween the connection between travelling contact 7 and the fixed contact 8 will be disconnected, carry out the routine operation that power circuit is disconnected, thereby the temperature of control unit is remained in certain scope.
Next, irrespectively the operation that contact disconnects is described for temperature with control unit.When the contact that will be in closure state is opened forcibly, need cam body 9 is rotated towards the direction shown in the arrow b, make curved surface B withstand the top of the longitudinal edge part 2b in the L type action plate, thereby the longitudinal edge part 2b of L type action plate is slided along curved surface B.Its result, will make L type action plate 2 serves as that axle rotates toward the clockwise direction with fulcrum k, the excellent 5 docking point plates 6 of action is no longer pushed, thereby made travelling contact 7 and being connected of fixed contact 8 be in off-state.
In the formation of above-mentioned existing apparatus, the pressure opening operation of switch is by turning knob axle 11, an end that makes L type action plate 2 is forcibly rotated and is realized along the curved surface of cam. still, frictional force between the curved surface of the end of L type action plate 2 and cam, under the influence of surface state etc., the rotating torques of rotation axis 11 is easy to increase, the end of L type action plate 2 can be coupled with among Fig. 5 towards left with towards the pressing force of reader's both direction. such one meter, be coupled with pressing force too on the fulcrum k of L type action plate 2, skew just may take place in the fulcrum position before forcing opening operation, and the variation of spring 3 elastic force also may make design temperature change.
Summary of the invention
The present invention is intended to solve the above-mentioned problems in the prior art, its purpose is to provide a kind of like this thermostat, this thermostat is carrying out switch when forcing opening operation, can not be subjected to the influence of the dimensional accuracy, surface state etc. of parts, and the rotating torques of rotation axis is kept stable; Simultaneously, even force opening operation, also can make fulcrum be difficult for being offset (spring force etc. are difficult for changing), design temperature also is difficult for changing.
In order to address the above problem, comprise in the thermostat of the present invention: by the bottom surface and constitute from 2 sides that face, roughly be "] " shell of shape; Be fixed on the switch on the described shell; Gas and the corresponding change in volume of environment temperature are transformed into the temperature-sensitive part of operating the required power of described switch; Accept the power of described temperature-sensitive part, be thereby that the center contact that makes described switch that rotates disconnects or closed rotating lever with the fulcrum of rotating lever; Combine with described rotating lever, be that the center rotates, rotates the adjustment plate that required strength is regulated to making described rotating lever with the fulcrum of adjusting plate; With the rotation axis that has the cam disc that makes described adjustment plate rotation.Wherein, the end of described rotating lever is provided with L word shape arm, the face that is positioned at rotating lever one side in the described cam disc is provided with bossing, bossing comes in contact at the L word shape arm of forcing open position and described rotating lever, and the position with described rotating lever during from switch conduction turns to open position forcibly.
Like this, when forcing opening operation, because the power that affacts on the L word shape arm of rotating lever is limited on the rotation direction of rotating lever, therefore can realize the moving less of a kind of rotating lever fulcrum etc., the high accuracy constant temperature device with low uncertainty of the operating temperature when turning back to conducting state once more.
The technique effect that the present invention produces is as follows.Adopt the words of thermostat of the present invention, owing to when forcing opening operation, the direction that acts on the power that acts on the L word shape arm can be limited on the rotation direction of rotating lever, therefore can provide a kind of the moving less of fulcrum etc., stable operation of rotating lever, the thermostat that reliability is high.
The specific embodiment of the present invention is summarized as follows.Comprise in the thermostat in the solution of the present invention 1: by the bottom surface and constitute from 2 sides that face, roughly be "] " shell of word shape; Be fixed on the switch on the described shell; Gas and the corresponding change in volume of environment temperature are transformed into the temperature-sensitive part of operating the required power of described switch; Accept the power of described temperature-sensitive part, be thereby that the center contact that makes described switch that rotates disconnects or closed rotating lever with the fulcrum of regulation; Combine with described rotating lever, be that the center rotates, rotates the adjustment plate that required strength is regulated to making described rotating lever with the fulcrum of regulation; With the rotation axis that has the cam disc that makes described adjustment plate rotation.Wherein, the end of described rotating lever is provided with L word shape arm, the face that is positioned at rotating lever one side in the described cam disc is provided with bossing, bossing comes in contact at the L word shape arm of forcing open position and described rotating lever, and the position with described rotating lever during from switch conduction turns to open position forcibly.Like this, when carrying out opening operation, because the power that affacts on the described rotating lever from the bossing of described cam disc is determined by the pressing force of this direction of rotation direction of described rotating lever, therefore, the L word shape arm of the bossing of cam disc and described rotating lever just can reduce the amount of described rotating lever generation lateral shift when coming in contact, rocking of fulcrum can be eliminated, and the variation of design temperature simultaneously also can be inhibited.
The solution of the present invention 2 is, the bossing of the cam disc described in the scheme 1 has circular shape. owing to be provided with circular shape, when withstanding, the L word shape arm of the bossing of cam disc and rotating lever just can be inhibited because of the situation that produces excessive frictional force, the rotating torques of the cam disc that causes such as block and increase mutually, therefore, the rotating torques of rotation axis is not vulnerable to the surface state of parts, the influence of dimensional accuracy, can keep stable.
In addition, the solution of the present invention 3 is, on the L word shape arm of bossing of cam disc described in the invention and described rotating lever described in scheme 1 or 2, be provided with planar section, thereby make the L word shape arm of described rotating lever and the bossing of described cam disc on the pressure open position of described cam disc, realize locking.Like this, at the rotating cam dish, be set to when forcing on the open position and can produce vibratory sensation, simultaneously, the open position of cam disc can not be offset yet, thereby can reliably off-state be remained on stable state.
Description of drawings
Fig. 1 is in the front cross-sectional view of forcing under the off-state for the thermostat in the expression embodiments of the invention 1,
The cam that Fig. 2 forces under the off-state for the thermostat of representing this embodiment is in and the partial top view of rotating lever position,
Fig. 3 is that the thermostat among this embodiment is in the front cross-sectional view under normal conducting or the off-state,
Fig. 4 is in the cam in normal conducting or off-state following time and the partial top view of rotating lever position for the thermostat of expression among this embodiment,
Fig. 5 is the sectional view of existing thermostat,
Fig. 6 is the vertical view of the cam body in the existing thermostat.
In the above-mentioned accompanying drawing, 21 is shell, and 22 is the temperature-sensitive part, 24 is rotating lever, and 24a is the fulcrum of rotating lever, and 26 is fixed contact, 27 is travelling contact, and 28 is switch, and 30 is L word shape arm, 30a is the planar section on the L word shape arm, and 32 for adjusting plate, and 32a is for adjusting the fulcrum of plate, 33 is rotation axis, and 34 is cam disc, and 34a is the bossing on the cam disc, 34b is the circular arc portion in the bossing on the cam disc, and 34c is the planar section in the bossing on the cam disc.
Embodiment
Rice is elaborated to one embodiment of the present of invention with reference to the accompanying drawings.Wherein, put on identical symbol with component parts identical in the existing apparatus, detailed description thereof is omitted at this.In addition, though present embodiment is the type that has defrosting detection of end mechanism, because the concrete operations of relevant defrosting detection of end and the present invention have nothing to do, so being described in this and also having omitted to it.
In the accompanying drawing, Fig. 1 is in the front cross-sectional view of forcing under the off-state for the thermostat in the expression embodiments of the invention 1, Fig. 2 forces the cam in off-state following time and the partial top view of rotating lever position for the thermostat of expression among this embodiment is in, Fig. 3 is in the front cross-sectional view in normal conducting or off-state following time for the thermostat of expression in the foregoing description, and Fig. 4 is in the cam in normally or off-state following time and the partial top view of rotating lever position for the thermostat in expression the foregoing description.
As shown in Fig. 1 to Fig. 4,21 is the thermostat shell, and 22 for being installed in the temperature-sensitive part on the shell 21.Be provided with bellows 22a in the temperature-sensitive part 22, bellows 22a and capillary 23 link.24 can rotate freely L word shape rotating lever with fulcrum 24a for being arranged to, and the horizontal edge part 24b of rotating lever 24 withstands on the free end 22b of bellows 22a, is fixing an end of temperature setting spring 25 on the longitudinal edge part 24c.
In addition, also fixing being used for making switch 28 that the spreader 29 of switching manipulation takes place on the longitudinal edge part 24c, switch 28 opens and closes fixed contact 26 and travelling contact 27.And the end of longitudinal edge part 24c is provided with the L word shape arm 30 that constitutes L word shape, is provided with planar section 30a in this L word shape arm 30.
The other end of temperature setting spring 25 is fixed on the adjustment plate 32 by adjusting screw 31. and adjust plate 32 and be arranged to and can rotate freely in shell 21 by the fulcrum 32a of bottom, the upper end of adjusting plate 32 is pressed on the operating temperature setting cam disc 34 that is provided with rotation axis 33.
In addition, be provided with bossing 34a with surface towards the surface opposite of shell 21 1 sides in the cam disc 34, bossing 34a is forcing to withstand the L word shape arm 30 that is arranged on the rotating lever 24 on the open position.Described bossing 34a is provided with circular arc portion 34b and planar section 34c.
Below the operational circumstances in the thermostat with above-mentioned formation is described.
When rising appears in the temperature in the temperature-sensitive part 22, bellows 22a will extend upwardly, and rotating lever 24 serves as that axle rotates toward the clockwise direction with fulcrum 24a, resist mutually with the elastic pulling force of the spring of being set by adjustment screw 31 25 (corresponding with design temperature).When temperature-sensitive part 22 surpasses design temperature, rotating lever 24 will further rotate toward the clockwise direction, by spreader 29 switch 28 is operated, make fixed contact 26 and travelling contact 27 closures, enter connection status by two sheet metals and flexure strip therebetween, switch on thereby make in the power circuit.
Next, when the temperature in the temperature-sensitive part 22 descends, bellows 22a will shrink (decline).Rotating lever 24 will be under the elastic pulling force effect of spring 25 serves as that axle is towards counterclockwise rotating with fulcrum 24a; Simultaneously, the pressing force that spreader 29 produces will reduce, and switch 28 is operated once more, and fixed contact 26 and travelling contact 27 are disconnected, and connection therebetween also is disengaged, and switches on thereby make in the power circuit.
Operation when below the temperature with temperature-sensitive part 22 irrespectively being disconnected contact is described.When cam disc 34 is turned to when forcing off-state position from the user mode of normally or disconnection, the bossing 34a on the cam disc 34 will contact with an end of L word shape arm 30 on the rotating lever 24; Be rotated further, will make rotating lever 24, and make disconnection between fixed contact 26 and the travelling contact 27, thereby make power circuit enter off-state by spreader 29 towards rotation counterclockwise.Like this,, the L word shape arm 30 of the bossing 34a of cam disc 34 and rotating lever 24 comes in contact, so be added with power on the rotation direction on the rotating lever 24 because being provided on the position away from the left and right fulcrum shaft center of rotating lever 24.Like this, just can not be coupled with the power beyond the direction of rotation on the rotating lever 24, the fulcrum 24a of the rotating lever 24 that causes because of rotation phenomenon such as is offset, rocks and just can be eliminated.
As mentioned above, be provided with in the thermostat of present embodiment: the roughly one-tenth "] that forms by bottom surface and 2 sides facing mutually " shell 21 of word shape; Be fixed on the switch 28 in the shell 21; Constitute the bellows 22a of temperature-sensitive part 22, this bellows 22a will be transformed into the power of console switch 28 because of the gas volume that environment temperature expands contraction; Capillary 23; Acceptance is that the center rotates, makes the fixed contact 26 in the switch 28 and travelling contact 27 disconnects or closed rotating lever 24 from the power of temperature-sensitive part 22, with the fulcrum 24a that stipulates; Be fixed together with rotating lever 24, be that the center rotates, rotates the adjustment plate 32 that required strength is regulated to making rotating lever 24 with the fulcrum 32a of regulation; With the rotation axis 33 that has the cam disc 34 that makes 32 rotations of adjustment plate.Like this, because the cam disc 34 in the above-mentioned thermostat is provided with bossing 34a, when with the angle more than the cam disc 34 rotation predetermined angulars, this bossing 34a will contact with the L word shape arm 30 on the rotating lever 24, rotating lever 24 is rotated, switch 28 is placed under the off-state; When forcing opening operation owing to be that rotating lever 24 is rotated towards its rotation direction, therefore on rotating lever 24, can not add horizontal strength, so fulcrum can not be offset, thereby can make stable operation, and can suppress the variation of design temperature.
In addition, have circular arc portion 34b on the bossing 34a of cam disc 34, when the L word shape arm 30 of the bossing 34a of cam disc 34 and rotating lever 24 comes in contact, can reduce the lateral shift of rotating lever 24 like this.In addition, on cam disc 34 and rotating lever 24, can not add excessive power yet, can make the cam rotating torques keep stable.
In addition, by planar section 34c, 30a being set respectively at the bossing 34a of cam disc 34 and the L word shape arm 30 of rotating lever 24, cam disc 34 can be locked in reliably and force on the open position, like this, when rotating cam dish 34 is set on the pressure open position, can produce vibratory sensation, and a kind of thermostat that can stably keep off-state and have very high reliability can be provided.
" locking " recited above is meant a kind of bonding state between the bossing 34a of L word shape arm 30 and cam disc 34,, even add some vibrations, impact, situations such as skew can not take place in the joint portion yet that is, can keep bonding state reliably.
In sum, the thermostat among the present invention is forcing also can to reach stable operating characteristic behind the opening operation, therefore go for being provided for cold district etc., have switch and force in the refrigerator etc. of thermostat of release mechanism.
Claims (2)
1. thermostat is characterized in that:
Comprise:
Constitute by bottom surface and 2 sides facing, roughly be "] " shell of shape;
Be fixed on the switch on the described shell;
Gas and the corresponding change in volume of environment temperature are transformed into the temperature-sensitive part of operating the required power of described switch;
Accept the power of described temperature-sensitive part, be thereby that the center contact that makes described switch that rotates disconnects or closed rotating lever with the fulcrum of rotating lever;
Combine with described rotating lever, be that the center rotates, rotates the adjustment plate that required strength is regulated to making described rotating lever with the fulcrum of adjusting plate; With
The rotation axis that has the cam disc that makes described adjustment plate rotation,
Wherein, the end of described rotating lever is provided with L word shape arm, the face that is positioned at rotating lever one side in the described cam disc is provided with bossing, bossing comes in contact at the L word shape arm of forcing open position and described rotating lever, position with described rotating lever during from switch conduction turns to open position forcibly
The bossing of described cam disc has circular shape.
2. thermostat as claimed in claim 1, it is characterized in that: the L word shape arm of the bossing of described cam disc and described rotating lever is provided with planar section, and the L word shape arm of described rotating lever and the bossing of described cam disc lock on the pressure open position of described cam disc.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-324839 | 2004-11-09 | ||
| JP2004324839A JP4440077B2 (en) | 2004-11-09 | 2004-11-09 | thermostat |
| JP2004324839 | 2004-11-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1773643A CN1773643A (en) | 2006-05-17 |
| CN1773643B true CN1773643B (en) | 2010-05-05 |
Family
ID=36728131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510118627 Expired - Fee Related CN1773643B (en) | 2004-11-09 | 2005-11-01 | Thermostat |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4440077B2 (en) |
| CN (1) | CN1773643B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964275A (en) * | 2010-09-26 | 2011-02-02 | 太平洋电子(昆山)有限公司 | Adjusting knob of automatic-reset temperature controller |
| CN103887112B (en) * | 2014-04-16 | 2016-03-30 | 滁州市发诺电气有限公司 | A kind of main lever shell mechanism of temperature controller |
| WO2016117752A1 (en) * | 2015-01-21 | 2016-07-28 | 주식회사 신한전기 | Operation piece and refrigerator thermostat using same |
| CN107275150B (en) * | 2017-08-04 | 2019-07-19 | 佛山通宝华通控制器有限公司 | A kind of small torque forced shutdown compression-type temperature controller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500760A (en) * | 1981-09-29 | 1985-02-19 | Thomson-Csf | Thermostat-controlled electric switch |
-
2004
- 2004-11-09 JP JP2004324839A patent/JP4440077B2/en not_active Expired - Fee Related
-
2005
- 2005-11-01 CN CN 200510118627 patent/CN1773643B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500760A (en) * | 1981-09-29 | 1985-02-19 | Thomson-Csf | Thermostat-controlled electric switch |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平9-139163A 1997.05.27 |
| 全文. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1773643A (en) | 2006-05-17 |
| JP4440077B2 (en) | 2010-03-24 |
| JP2006134797A (en) | 2006-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1773643B (en) | Thermostat | |
| EP2413340B1 (en) | Switch and electronic device | |
| CN1993789B (en) | Thermostat | |
| JPH07101583B2 (en) | Two-action pressure switch | |
| CN101958204B (en) | Thermal overload relay | |
| JP3994951B2 (en) | thermostat | |
| US2375387A (en) | Circuit controlling device | |
| CA1119646A (en) | Temperature responsive control device with improved hydraulic diaphragm | |
| JP2007280871A (en) | Thermostat | |
| US2511640A (en) | Circuit controlling device | |
| US2315960A (en) | Circuit controller | |
| CN204390986U (en) | Switch protection device | |
| WO2011048732A1 (en) | Thermomotive overload relay | |
| CN100499003C (en) | Thermostat | |
| JPS5822870A (en) | Damper type freezing refrigerator | |
| CN210110656U (en) | Combined auxiliary contact group for contactor | |
| KR200241479Y1 (en) | dialing device in thermal-relay | |
| JP2008130254A (en) | Adjusting screw mechanism, pressure switch, and load adjustment method | |
| JPS5810276Y2 (en) | thermostat | |
| JP2005149724A (en) | Current breaker | |
| JPS6348713A (en) | Dead point passage type symmetrical impact switch | |
| JP2802127B2 (en) | switch | |
| JPS5868822A (en) | Thermostat | |
| JPS639086Y2 (en) | ||
| US6940374B2 (en) | Overload/open-phase tripping device for circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20131101 |