CN1207742C - Heat responsive operation switch - Google Patents
Heat responsive operation switch Download PDFInfo
- Publication number
- CN1207742C CN1207742C CNB001058525A CN00105852A CN1207742C CN 1207742 C CN1207742 C CN 1207742C CN B001058525 A CNB001058525 A CN B001058525A CN 00105852 A CN00105852 A CN 00105852A CN 1207742 C CN1207742 C CN 1207742C
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- CN
- China
- Prior art keywords
- contact point
- bimetal leaf
- place
- fixed contact
- movable contact
- 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
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
- G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
- G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermally Actuated Switches (AREA)
Abstract
To obtain the structure of a thermally actuated switch. A supporting member having a fixed contact, and a bimetal piece having a movable contact conducting contact/separation with/from the fixed contact at one end and fixed to the supporting member at the other end are installed, and obstructing members for obstructing the contact of the movable contact with the fixed contact by the contact with the bimetal piece in the way of returning after the bimetal piece is reversed in accordance with temperature are installed between the bimetal piece and the supporting member. Reversing and returning won't happen even when gradual change of temperature.
Description
Technical field
The present invention relates to heat responsive operation switch, movable contact point is moved so that make between electric contact point open, the switch module of closed usefulness.
Background technology
Formerly a kind of heat responsive operation switch in the technology has as Fig. 8 to structure formation shown in Figure 10.Fig. 8 is illustrated in the side view that state is used between movable contact point and fixed contact point under the normal temperature state, when Fig. 9 makes the bimetal leaf counter-rotating for being illustrated in the temperature rising, the side view that state is used between movable contact point and fixed contact point, Figure 10 is for being illustrated in after the bimetal leaf counter-rotating, contacts the side view that state is used between movable contact point and fixed contact point before restoring once more.
Just as shown in these figures, housing 11 is made of the insulating material such as synthetic resin etc., and forms box, and also is provided with peristome 11a at place, one end.Also the support component 12 that is formed by the insulating material such as synthetic resin etc. can insert and be combined in this peristome 11a place, and this support component 12 has base portion 12a, and is risen substantially by this base portion 12a and to be
Font is extended the contact point maintaining part 12b that is provided with.
If for instance, embedded install at described base portion 12a place by two kinds of different metal materials of coefficient of thermal expansion bonding that form, be flat bimetal leaf 13.Place, a free-ended end is fixedly mounting movable contact point 14 on as this bimetal leaf 13, and place, the other end form by described base portion 12a toward the outer side direction extend the movable terminal 15 that is provided with, can be connected with the external circuit (not shown).
Embedded install parallel with described movable terminal 15 cardinal principles at described base portion 12a place, also toward the outer side direction extend to be provided with, be flat fixed terminal 16, the central portion of this fixed terminal 16 remains on described contact point maintaining part 12b place, in the relative position of its leading section side and described movable contact point 14, also fixedly mounting fixed contact point 17.
Manner of execution to this heat responsive operation switch describes below.Described movable contact point 14 and described fixed contact point 17 opposite each other under the normal temperature state contacts with each other and is the contact point conducting state.When temperature begins to rise under by this state, the described bimetal leaf 13 that is installed with described movable contact point 14 will produce counter-rotating along with variation of temperature.At this moment, the described movable contact point 14 that is fixedly mounted on described bimetal leaf 13 places will be driven with described bimetal leaf 13, and 17 places are left by described fixed contact point, not contact with the latter, and institute is so that be off-state between contact point.
If temperature is descended by this state and is back to normal temperature, the recovery of will reversing along with variations in temperature of then described bimetal leaf 13, and then described movable contact point 14 is contacted with described fixed contact point 17, and make contact point be in conducting state, promptly restore to initial condition.
Yet the heat responsive operation switch in the aforesaid this technology formerly, in order under the normal temperature state, to obtain the contact pressure of 17 of movable contact point 14 and fixed contact points, need in advance bimetal leaf 13 to be implemented initial deformation processing, therefore after bimetal leaf 13 reverses along with variations in temperature, temperature is descended by this state and is back in the process of normal temperature, temperature is slowly the state that changes (cooling slowly), counter-rotating bimetal leaf 13 is as shown in figure 10 restoring to the normal state, movable contact point 14 meetings and 17 of fixed contact points keep in touch state, even therefore be back to the normal temperature state, bimetal leaf 13 can not produce counter-rotating yet, thereby movable contact point 14 is kept in touch with fixed contact point 17, promptly remain on the contact point conducting state.In this state, when temperature is risen once more by the normal temperature state, as shown in Figure 9,, also be in inverted status and can not have produced bigger counter-rotating owing to bimetal leaf 13 even bimetal leaf 13 produces counter-rotating.And because movable contact point 14 produces small reciprocal variation, so between contact point, can produce unstable shape vibration.
Summary of the invention
The present invention is exactly the invention that addresses the above problem usefulness, purpose of the present invention just provides in a kind of process of reversing along with variations in temperature at bimetal leaf, restoring once more, even do not forming under the state of counter-rotating restoring action owing to the slowly variation (cooling slowly) of temperature, also can make the state of leaving that remains on that contacts between movable contact point and fixed contact point, thereby can prevent to rise and when forming counter-rotating once more and leaving, the contact point place between movable contact point and fixed contact point produces the heat responsive operation switch that is unstable shape vibration in temperature.
As the heat responsive operation switch of the present invention that addresses the above problem, it can be provided with the support component of fixed contact point, and have and to contact with described fixed contact point at one end place, the movable contact point that separates, be fixed on the bimetal leaf at described support component place with the other end, and being provided with described bimetal leaf implements after reversing along with variations in temperature in the process of recovery, can connect with described bimetal leaf and stop contact with the described fixed contact point prevention parts of usefulness of described movable contact point, stop parts can also be formed between described bimetal leaf and the described support component, its set-up mode is under described movable contact point and the contacted normal temperature state of described fixed contact point, described prevention parts can and described bimetal leaf between separate, and when described movable contact point and described fixed contact point were separated and reverse, it can connect with described bimetal leaf again.
The prevention parts of heat responsive operation switch of the present invention can be made of the jut that forms as one with the support component that is provided with described fixed contact point.
The prevention parts of heat responsive operation switch of the present invention can by be fixed on described bimetal leaf place, have and can constitute with the bimetallic supporting bracket that described bimetal leaf produces the jut of deflection.
The bimetallic supporting bracket place of heat responsive operation switch of the present invention can also be formed with counter-rotating hinge usefulness, that be the expansion overshooting shape and twist portion, and disposes with this hinge and twist the relative described prevention parts of portion.
Description of drawings
Fig. 1 for the heat responsive operation switch of expression first embodiment of the invention under the normal temperature state, the side view of state between movable contact point and fixed contact point.
Fig. 2 is for representing this embodiment when the temperature rising makes the bimetal leaf counter-rotating, the side view of state between movable contact point and fixed contact point.
Fig. 3 for this embodiment of expression after bimetal leaf counter-rotating, when restoring once more when stoping parts to connect the side view of state.
Fig. 4 twists the fragmentary cross-sectional view that concerns between portion for hinge on prevention parts among this embodiment of expression and the bimetal leaf, that be the expansion overshooting shape.
Fig. 5 for expression as the heat responsive operation switch of second embodiment of the invention under the normal temperature state, the side view of state between movable contact point and fixed contact point.
Fig. 6 is for representing this embodiment when the temperature rising makes the bimetal leaf counter-rotating, the side view of state between movable contact point and fixed contact point.
Fig. 7 for this embodiment of expression after bimetal leaf counter-rotating, when restoring once more when stoping parts to connect the side view of state.
Fig. 8 represents heat responsive operation switch in the technology formerly under the normal temperature state, the side view of state between movable contact point and fixed contact point.
Fig. 9 for represent this formerly technical examples rise when making the bimetal leaf counter-rotating side view of state between movable contact point and fixed contact point in temperature.
Figure 10 for expression this formerly technical examples after bimetal leaf counter-rotating, contact the side view of state before restoring once more between movable contact point and fixed contact point.
Embodiment
Below with reference to Fig. 1 to Fig. 7 most preferred embodiment of the present invention is described.Fig. 1 to Fig. 4 shows a kind of structure form of the composition as the heat responsive operation switch of first embodiment of the invention.As shown in the figure, housing 1 is made of the insulating material such as synthetic resin etc., and forms the box that is rectangle.Place, an end on the longitudinal direction that is positioned at this housing 1 is provided with peristome 1a, and support component as described later can insert and be combined in this peristome 1a place.
Support component 2 can also be formed by the insulating material such as synthetic resin etc., this support component 2 has the base portion 2a at the described peristome 1a place that can insert and be combined on the described housing 1, and extending towards the longitudinal direction of described housing 1 by this base portion 2a place, form substantially and be
The contact point maintaining part 2b of font.Be provided with the 2c of upstanding wall portion in the front end of this contact point maintaining part 2b, also be provided with the stage portion 2d that is plane at the place, inboard of the 2c of this upstanding wall portion.Disposing fixed contact point 3 relative with as described later movable contact point, that constitute by conductive material at this stage portion 2d place; the described upstanding wall 2c of portion also has when described support component 2 is assembled in described housing 1 place, and the function of described fixed contact point 3 and movable contact point as described later being implemented protection in handling process.
Described contact point maintaining part 2b place on described support component 2 also is formed with jut 2e, and the direction that the hinge of this jut 2e expansion projection on by bimetal leaf is as described later twisted portion is outstanding.And this jut 2e is formed between described bimetal leaf and the described support component 2, its height dimension is determined in the following manner, promptly be in contacted normal temperature state following time when as described later movable contact point and described fixed contact point 3, jut 2e can and described bimetal leaf between separated from each other, and when as described later movable contact point and described fixed contact point 3 are separated and reverse, can connect with described bimetal leaf again.
With described base portion 2a on the bearing of trend opposite sides of described contact point maintaining part 2b, also be provided with outstanding toward the outer side, that be connected with the external circuit (not shown) by the peristome 1a place on the described housing 1, be a pair of movable terminal 4 and the fixed terminal 5 of parallel shape substantially.This a pair of movable terminal 4 and fixed terminal 5 can be by constituting such as metal material brass etc., that have conductivity, and form plate shape, the embedded place, inside of extending the described contact point maintaining part 2b that is connected with described base portion 2a that is arranged on of the central portion of described fixed terminal 5, its leading section also is electrically connected with described fixed contact point 3.The embedded described base portion 2a place that is arranged on of the central portion of described movable terminal 4, its leading section is configured in the place, inside of the peristome 1a on the described housing 1.
For example, embedded install at described base portion 2a place by two kinds of different metal materials of coefficient of thermal expansion bonding that form, be flat bimetal leaf 6.On as this bimetal leaf 6 place, a free-ended end fixedly mounting relative with described fixed contact point 3, by having the movable contact point 7 that conductive material constitutes, and the other end embedded installs at described base portion 2a place, its part by be configured in described housing 1 on the described movable terminal 4 point-like fusing mode at inside place of peristome 1a combining.
Be formed with at the central portion place of described bimetal leaf 6 and can increase the hinge counter-rotating effect, that be the expansion overshooting shape and twist the 6a of portion, twist the mode of the 6a of portion, bimetal leaf 6 can be changed and the action of reversing reliably by response temperature by being provided with this hinge.
The manner of execution of the heat responsive operation switch that constitutes according to the present invention describes below.Described movable contact point 7 and described fixed contact point 3 opposite each other under the normal temperature state contacts with each other, and is the contact point conducting state.When temperature began to rise under by this state, the hinge that is positioned at described bimetal leaf 6 places that fixedly mounting described movable contact point 7 was twisted the 6a of portion, will reverse along with variations in temperature.At this moment, the described movable contact point 7 that is fixedly mounted on described bimetal leaf 6 places will be driven with described bimetal leaf 6, and be left by described fixed contact point 3 places, thereby make contact point be off-state.In this case, hinge on the described bimetal leaf 6 after the counter-rotating is twisted the 6a of portion, its expansion jut will reverse, and will be towards the direction of described fixed contact point 3, promptly towards the direction projection of described contact point maintaining part 2b, thereby connect with the described jut 2e that is arranged on described contact point maintaining part 2b place.
And when temperature is descended by this state and be back to normal temperature when initial, hinge on the described bimetal leaf 6 is twisted the 6a of the portion recovery of will reversing along with variations in temperature, towards the direction opposite with described fixed contact point 3, promptly towards the direction projection opposite with described jut 2e, thereby remove the butt state between stubborn 6a of portion of described hinge and described jut 2e, described movable contact point 7 is contacted with described fixed contact point 3, and then make contact point be in conducting state, promptly be back to initial condition.
In the structure of the aforesaid this heat responsive operation switch of the present invention constitutes, central portion place at described bimetal leaf 6, be formed with when reversing, can increase hinge its counter-rotating effect, that be the expansion overshooting shape and twist the 6a of portion, so the action of can reversing reliably along with variations in temperature.
And when the temperature rising, when the stubborn 6a of portion of this hinge is reversed along with variations in temperature, also be provided with described jut 2e owing to twist the relative position of the 6a of portion with this hinge at described contact point maintaining part 2b, so when temperature descends, if described hinge is twisted the 6a of portion and is not formed the counter-rotating restoring action owing to the slowly variation (cooling slowly) of temperature, then described hinge is twisted the 6a of portion and will be connected with this jut 2e, and make the state of leaving that remains on that contacts of described movable contact point 7 and 3 of described fixed contact points, thereby can prevent to rise once more and when reversing once more the vibration that produces unstable shape at the contact point place of 3 of movable contact point 7 and fixed contact points in temperature.
Fig. 5 to Fig. 7 shows a kind of structure form of the composition as the heat responsive operation switch of second embodiment of the invention.
At this, for the same parts that illustrated referring to figs. 1 to Fig. 4, given identical reference number, and omitted detailed description them.
This second embodiment is that with different places between first embodiment structure that is arranged on the prevention parts at support component 2 places constitutes different.That is,, be not arranged on by support component 2 places and extend the contact point maintaining part 2b place that is provided with, and be arranged on the base portion 2a place on the support component 2 as the prevention element in the heat responsive operation switch of second embodiment of the invention.This prevention parts can be made of the metallic plate with elasticity and conductivity, and form tabular, the embedded described base portion 2a place that is arranged on of its central portion, one end place has can be by the outstanding toward the outer side movable terminal 8 of the peristome 1a on the described housing 1, be formed with at place, the other end its part and described bimetal leaf 6 that combine, have the bimetallic supporting bracket 9 of jut 9a in its free end place formation.This bimetallic supporting bracket 9 embedded installs at described base portion 2a place according to the mode parallel substantially with the above-below direction of described bimetal leaf 6.And, be arranged on the described jut 9a at the free end place on the described bimetallic supporting bracket 9, according to be arranged on described bimetal leaf hinge 6 places, that be the expansion overshooting shape and twist the relative mode of the 6a of portion and be provided with.
And, described jut 9a is formed between described bimetal leaf 6 and the described support component 2, its height dimension is set in the following manner, promptly under described movable contact point 7 and described fixed contact point 3 contacted normal temperature states, described jut 9a can be left by described bimetal leaf 6 places, and be separated with described fixed contact point 3 and when reversing, it can connect with described bimetal leaf 6 again when described movable contact point 7.
The manner of execution of the heat responsive operation switch that constitutes according to second embodiment of the invention describes below.Described movable contact point 7 and described fixed contact point 3 opposite each other under the normal temperature state contacts with each other and is the contact point conducting state.When temperature began to rise under by this state, the hinge that is positioned at described bimetal leaf 6 places that are installed with described movable contact point 7 was twisted the 6a of portion, will reverse along with variations in temperature.At this moment, the described movable contact point 7 that is fixedly mounted on described bimetal leaf 6 places will be driven with described bimetal leaf 6, and 3 places are left by described fixed contact point, thereby make contact point be off-state.In this case, the hinge on the described bimetal leaf 6 after the counter-rotating is twisted the 6a of portion, and its expansion jut will reverse, and outstanding towards the direction of described fixed contact point 3, thereby connects with the described jut 9a that is arranged on described bimetallic supporting bracket 9 places.
In this case; because the described jut 9a on the described bimetallic supporting bracket 9 twists the extruding that the 6a of portion goes up the expansion jut to described hinge; usually can be with the free end on the described bimetal leaf 6, be the fixation side on the described movable contact point 7; pressure is squeezed to the upper interior place of described housing 1; yet since described bimetallic supporting bracket 9 by rubber-like, be flat metallic plate and form; so described bimetallic supporting bracket 9 will produce deflection, can prevent from thus described bimetal leaf 6 is forced to be squeezed to described housing 1 place.Therefore, the stress that this structure form of the composition is produced on described bimetal leaf 6 in the time of can relaxing described bimetal leaf 6 forced to be squeezed to described housing 1 place, and then can prevent plastic deformation.
And when temperature is descended by this state and be back to normal temperature when initial, hinge on the described bimetal leaf 6 is twisted the 6a of the portion recovery of will reversing along with variations in temperature, towards the direction opposite with described fixed contact point 3, promptly towards the direction projection opposite with described jut 9a, thereby remove the butt state between stubborn 6a of portion of described hinge and described jut 9a, described movable contact point 7 is contacted with described fixed contact point 3 and be in the contact point conducting state, promptly be back to initial condition.
As mentioned above, in constituting according to the structure of this heat responsive operation switch of second embodiment of the invention structure, central portion place at described bimetal leaf 6, be formed with when reversing along with variations in temperature, can increase hinge its counter-rotating effect, that be the expansion overshooting shape and twist the 6a of portion, so can implement the counter-rotating action reliably.And when the temperature rising, when the stubborn 6a of portion of this hinge is reversed along with variations in temperature, owing to also be provided with and the stubborn relative described jut 9a of the 6a of portion of this hinge at described bimetallic supporting bracket 9 places, so when temperature descends, if described hinge is twisted the 6a of portion and is not formed the counter-rotating restoring action owing to the slowly variation (cooling slowly) of temperature, then described hinge is twisted the 6a of portion and will be connected with this jut 9a, make the state of leaving that remains on that contacts of described movable contact point 7 and 3 of described fixed contact points, thereby can prevent to rise and when forming counter-rotating once more and leaving the vibration that produces unstable shape at the contact point place of 3 of movable contact point 7 and fixed contact points when temperature.
And in the above embodiment of the present invention, it is according to rising in temperature during counter-rotating that hinge on the described bimetal leaf 6 is twisted the 6a of portion, connect with the described jut 2e on the described contact point maintaining part 2b, or form with mode that described jut 9a on the described bimetallic supporting bracket 9 connects, yet the present invention is not limited in these forms of the composition, the structure form of the composition of leaving mutually with them when also can negate changeing, when when temperature descends, not producing under the situation of counter-rotating, but can also adopt response temperature decline and twist the form of the composition that the 6a of portion connects, can obtain identical technique effect with the hinge on the described bimetal leaf 6.
As mentioned above, thermal response-type switch of the present invention is between bimetal leaf and support component, be provided with in the process of after bimetal leaf reverses along with variations in temperature, implementing to restore, can connect with bimetal leaf and stop contact with the fixed contact point prevention parts of usefulness of movable contact point, so when temperature descends, bimetal leaf is along with the slowly variation of temperature (cooling slowly) when not forming the counter-rotating restoring action, by the mode that connects with this jut, also can make the state of leaving that remains on that contacts between movable contact point and fixed contact point, thereby can prevent to rise and when forming counter-rotating once more and leaving the vibration that the contact point place between movable contact point and fixed contact point produces unstable shape when temperature.
And the present invention can also make and stop parts to be made of the jut that forms as one with the support component that is arranged on the fixed contact point place, can also make the model manufacturing simple, easily like this, makes the assembleability of manufactured goods good, and can make its cost degradation.
And, the present invention can also make stop parts by be fixed on the bimetal leaf place, have and can constitute with the bimetallic supporting bracket that bimetal leaf produces the jut of deflection, so can prevent from by the deflection of bimetallic supporting bracket bimetal leaf is forced to be squeezed to the housing place, thereby can relax the stress that is created on the bimetal leaf, prevent plastic deformation.
And, the present invention can also be formed with counter-rotating hinge usefulness, that be the expansion overshooting shape at bimetallic supporting bracket place and twist portion, and dispose with this hinge and twist the relative described prevention parts of portion, so bimetal leaf is connected with stoping parts, increase is to the extruding force of bimetal leaf, thereby can prevent to produce between movable contact point and fixed contact point the phenomenon such as welding etc.
And, the present invention can also make and stop parts to be formed between bimetal leaf and the support component, and can be according under movable contact point and the contacted normal temperature state of fixed contact point, can and bimetal leaf between separate, and when movable contact point and fixed contact point are separated and reverse, can be provided with in the mode that connects with bimetal leaf again, institute is so that remain on released state reliably between movable contact point and fixed contact point, the Reliability of raising contact point.
Claims (4)
1. heat responsive operation switch, it is characterized in that having the support component that is provided with fixed contact point, and have and to contact with described fixed contact point at one end place, the movable contact point that separates, be fixed on the bimetal leaf at described support component place with place, its other end, and being provided with described bimetal leaf implements after reversing along with variations in temperature in the process of recovery, can connect with described bimetal leaf and stop contact with the described fixed contact point prevention parts of usefulness of described movable contact point, these prevention parts are set between described bimetal leaf and the described support component, its set-up mode is under described movable contact point and the contacted normal temperature state of described fixed contact point, can and described bimetal leaf between separate, and when described movable contact point and described fixed contact point are separated and reverse, can connect with described bimetal leaf again.
2. heat responsive operation switch as claimed in claim 1 is characterized in that described prevention parts are made of the jut that forms as one with the support component that is provided with described fixed contact point.
3. heat responsive operation switch as claimed in claim 1, it is characterized in that described prevention parts by be fixed on described bimetal leaf place, have and can constitute with the bimetallic supporting bracket that described bimetal leaf produces the jut of deflection.
4. heat responsive operation switch as claimed in claim 1 is characterized in that described bimetal leaf place is formed with counter-rotating hinge usefulness, that be the expansion overshooting shape and twists portion, and disposes with this hinge and twist the relative described prevention parts of portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11108741A JP2000299042A (en) | 1999-04-16 | 1999-04-16 | Thermally actuated switch |
| JP108741/1999 | 1999-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1271173A CN1271173A (en) | 2000-10-25 |
| CN1207742C true CN1207742C (en) | 2005-06-22 |
Family
ID=14492352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001058525A Expired - Fee Related CN1207742C (en) | 1999-04-16 | 2000-04-12 | Heat responsive operation switch |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2000299042A (en) |
| KR (1) | KR20000077030A (en) |
| CN (1) | CN1207742C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100784139B1 (en) * | 2006-04-13 | 2007-12-10 | 정해양 | Protector of Over Load And Plug And Multi-tab Using The Same |
-
1999
- 1999-04-16 JP JP11108741A patent/JP2000299042A/en not_active Withdrawn
-
2000
- 2000-04-12 CN CNB001058525A patent/CN1207742C/en not_active Expired - Fee Related
- 2000-04-15 KR KR1020000019803A patent/KR20000077030A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000077030A (en) | 2000-12-26 |
| CN1271173A (en) | 2000-10-25 |
| JP2000299042A (en) | 2000-10-24 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |