CN107928320B - Mother and infant prevents scalding straw - Google Patents
Mother and infant prevents scalding straw Download PDFInfo
- Publication number
- CN107928320B CN107928320B CN201710946825.6A CN201710946825A CN107928320B CN 107928320 B CN107928320 B CN 107928320B CN 201710946825 A CN201710946825 A CN 201710946825A CN 107928320 B CN107928320 B CN 107928320B
- Authority
- CN
- China
- Prior art keywords
- cavity
- sliding plug
- strong magnetic
- magnetic sliding
- kerosene
- 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
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G21/00—Table-ware
- A47G21/18—Drinking straws or the like
Abstract
The invention provides a mother-infant scald-proof suction tube which comprises a metal closed cavity, wherein a strong magnetic sliding plug capable of sliding up and down is arranged in the metal closed cavity; kerosene and air are respectively sealed in the sealed areas below and above the strong magnetic sliding plug; a transition cavity is arranged above the closed cavity, and the side wall and the upper end of the transition cavity are provided with a water inlet hole and a water outlet hole; a switch cavity is arranged above the transition cavity, the upper part of the switch cavity is connected with the straw main body, and a water passing plate which restrains the ferromagnet in the switch cavity is arranged between the switch cavity and the straw main body; when the ferromagnet falls to the bottom of the switch cavity, the water outlet hole above the transition cavity is blocked; when the kerosene temperature is lower than 40 ℃, the strong magnetic sliding plug descends, and the maximum attraction force of the strong magnetic sliding plug to the ferromagnetic body is smaller than the product of the standard atmospheric pressure and the area of the water outlet; when the kerosene temperature is higher than 45 ℃, the strong magnetic sliding plug rises, and the minimum attraction force of the strong magnetic sliding plug to the ferromagnetic body is larger than the product of the standard atmospheric pressure and the area of the water outlet hole. The anti-scald straw for mothers and babies can be automatically sealed when the temperature of liquid is higher, so that the scald in the oral cavity is prevented.
Description
The application is a divisional application with application number 2016111683241, application date 2016, 12 and 16, and invention name 'mother and infant scald-proof straw'.
Technical Field
The invention relates to the field of mother and infant articles, in particular to a straw.
Background
In the field of mother and infant articles, a straw is a common article; when the liquid is sucked by the suction pipe, the liquid is quickly introduced into the mouth of the suction pipe, and when the liquid temperature is high, if the liquid temperature is not noticed, the oral cavity of the baby is likely to be scalded; therefore, when the accompanying energy is limited, the infants take the heated liquid such as milk by using the common straw, and the danger is high.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a mother and infant scald-proof straw, which can be automatically closed when the temperature of the liquid is high, so as to prevent the oral cavity from being scalded.
The first technical scheme adopted by the invention for solving the technical problems is as follows: the mother and infant scald-proof straw comprises a metal closed cavity at the lowest end, wherein a strong magnetic sliding plug capable of sliding up and down along the axis of the straw is arranged in the closed cavity; kerosene is sealed in the sealed area below the strong magnetic sliding plug, and air is sealed in the sealed area above the strong magnetic sliding plug; a transition cavity is arranged above the closed cavity, a water inlet hole is formed in the side wall of the transition cavity, and a water outlet hole is formed in the upper end of the transition cavity; a switch cavity is also arranged above the transition cavity, the upper part of the switch cavity is connected with the straw main body, a water passing plate is arranged between the switch cavity and the straw main body, and the water passing plate restrains a ferromagnetic body in the switch cavity; when the ferromagnetic body falls to the bottom of the switch cavity, the water outlet hole above the transition cavity is just blocked, and when the ferromagnetic body rises to the top of the switch cavity, the water passing plate is not blocked; when the temperature of the kerosene is lower than 40 ℃, the strong magnetic sliding plug descends along with the contraction of the kerosene, and the maximum suction force of the strong magnetic sliding plug to the ferromagnetic body is smaller than the product of one standard atmospheric pressure and the area of the water outlet; when the temperature of the kerosene is higher than 45 ℃, the strong magnetic sliding plug rises along with the expansion of the kerosene, and the minimum suction force of the strong magnetic sliding plug to the ferromagnetic body is larger than the product of one standard atmospheric pressure and the area of the water outlet hole.
Preferably, the water passing plate is composed of a porous plate densely distributed with through holes; the ferromagnetic body is composed of a stainless steel ball, such as a martensitic stainless steel ball, which can be attracted by a permanent magnet.
Preferably, the suction pipe main body is inserted into and pulled out of the upper end of the switch cavity, so that the suction pipe main body is directly adopted to smoothly suck liquid when high-temperature protection is not needed.
The second technical scheme adopted by the invention for solving the technical problems is as follows: the mother and infant scald-proof straw comprises a metal closed cavity at the lowest end, wherein a strong magnetic sliding plug capable of sliding up and down along the axis of the straw is arranged in the closed cavity; kerosene is sealed in the sealed area below the strong magnetic sliding plug, and air is sealed in the sealed area above the strong magnetic sliding plug; a transition cavity is arranged above the closed cavity, a water inlet hole is formed in the side wall of the transition cavity, and a water outlet hole is formed in the upper end of the transition cavity; the upper part of the transition cavity is connected with the straw main body; a ferromagnetic sliding plug with a shaft hole is arranged in the transition cavity, when the ferromagnetic sliding plug slides to the bottom of the transition cavity, the side wall of the ferromagnetic sliding plug plugs the water inlet hole of the transition cavity, and when the ferromagnetic sliding plug slides to the top of the transition cavity, the water inlet hole of the transition cavity is communicated with the water outlet hole of the transition cavity through the shaft hole of the ferromagnetic sliding plug; the peripheral wall of the ferromagnetic sliding plug is also provided with a ring groove; when the temperature of the kerosene is lower than 40 ℃, the strong magnetic sliding plug descends along with the contraction of the kerosene, and the maximum suction force of the strong magnetic sliding plug to the ferromagnetic sliding plug is smaller than the product of standard atmospheric pressure and the horizontal projection area of the ring groove; when the temperature of the kerosene is higher than 45 ℃, the strong magnetic sliding plug rises along with the expansion of the kerosene, and the minimum suction force of the strong magnetic sliding plug to the ferromagnetic sliding plug is larger than the product of a standard atmospheric pressure and the horizontal projection area of the ring groove.
Preferably, the suction pipe main body is inserted into and pulled out of the upper end of the transition cavity, so that the suction pipe main body is directly adopted to smoothly suck liquid when high-temperature protection is not needed.
Above-mentioned two kinds of mothers and babies prevent scalding straw's beneficial effect lies in: when the temperature of the liquid is higher, the expansion force of kerosene in the closed cavity is far greater than that of air, so that the strong magnetic sliding plug rises, the magnetic attraction force between the strong magnetic sliding plug and the ferromagnetic body or ferromagnetic sliding plug is increased to be larger than the upward acting force of atmospheric pressure on the ferromagnetic body or ferromagnetic sliding plug, the water outlet hole or water inlet hole of the transition cavity is blocked, and the suction pipe cannot suck high-temperature liquid; when the liquid temperature is lower, the magnetic attraction between the ferromagnetic sliding plug and the ferromagnetic sliding plug is reduced to a lower level due to the reduction of the ferromagnetic sliding plug, so that the atmospheric pressure can push the ferromagnetic sliding plug upwards, and the suction pipe can normally suck the low-temperature liquid.
Drawings
Fig. 1 is a schematic view of a first embodiment of the anti-scald mother-infant straw.
Fig. 2 is a schematic view of a second embodiment of the mother-baby scald-proof straw.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
implementing one step:
in the first embodiment shown in fig. 1, the mother-infant scald-proof straw comprises a metal closed cavity 1 at the lowest end, and a strong magnetic sliding plug 11 capable of sliding up and down along the axis of the straw is arranged in the closed cavity 1; kerosene 12 is sealed in a sealed area below the strong magnetic sliding plug 11, and air 13 is sealed in a sealed area above the strong magnetic sliding plug 11; a transition cavity 2 is arranged above the closed cavity 1, a water inlet hole 21 is formed in the side wall of the transition cavity 2, and a water outlet hole 22 is formed in the upper end of the transition cavity 2; a switch cavity 3 is further arranged above the transition cavity 2, a straw main body 4 is connected above the switch cavity 3, a water passing plate 31 is arranged between the switch cavity 3 and the straw main body 4 in a separation mode, and a ferromagnetic body 32 is restrained in the switch cavity 3 by the water passing plate 31; when the ferromagnetic body 32 falls to the bottom of the switch cavity 3, the water outlet hole 22 above the transition cavity 2 is just blocked, and when the ferromagnetic body 32 rises to the top of the switch cavity 3, the water passing plate 31 is not blocked; when the temperature of the kerosene 12 is lower than 40 ℃, the ferromagnetic sliding plug 11 descends along with the contraction of the kerosene, and at this time, the maximum suction force of the ferromagnetic sliding plug 11 to the ferromagnetic body 32 is smaller than the product of a standard atmospheric pressure and the area of the water outlet hole 22, that is, when the air above the ferromagnetic body 32 is sucked away, the external atmospheric pressure has the capacity of lifting the ferromagnetic body 32 upwards; when the temperature of the kerosene is higher than 45 ℃, the ferromagnetic sliding plug 11 rises along with the expansion of the kerosene, and at this time, the minimum suction force of the ferromagnetic sliding plug 11 to the ferromagnetic body 32 is larger than the product of a standard atmospheric pressure and the area of the water outlet hole 22, and at this time, even if a vacuum is formed above the ferromagnetic body 32, the ferromagnetic body 32 cannot be lifted upwards by the external atmospheric pressure, so the ferromagnetic body 32 is always positioned at the bottom of the switch cavity 3.
In the mother and infant anti-scald straw, the water passing plate 31 is a porous plate densely distributed with through holes; the ferromagnetic body 32 is formed of a stainless steel ball, such as a martensitic stainless steel ball, that is attracted by a permanent magnet. In addition, the suction pipe main body 4 can be inserted into and pulled out of the upper end of the switch cavity 3, so that the suction pipe main body 4 can be directly and smoothly sucked when high-temperature protection is not needed.
Example two:
in the second embodiment shown in fig. 2, the mother-infant scald-proof straw comprises a metal closed cavity 1 at the lowest end, and a strong magnetic sliding plug 11 capable of sliding up and down along the axis of the straw is arranged in the closed cavity 1; kerosene 12 is sealed in a sealed area below the strong magnetic sliding plug 11, and air 13 is sealed in a sealed area above the strong magnetic sliding plug 11; a transition cavity 2 is arranged above the closed cavity 1, a water inlet hole 21 is formed in the side wall of the transition cavity 2, and a water outlet hole 22 is formed in the upper end of the transition cavity 2; the upper part of the transition cavity 2 is connected with a straw main body 4; a ferromagnetic sliding plug 23 with a shaft hole is arranged in the transition cavity 2, when the ferromagnetic sliding plug 23 slides to the bottom of the transition cavity 2, the side wall of the ferromagnetic sliding plug 23 plugs the water inlet 21 of the transition cavity, and when the ferromagnetic sliding plug 23 slides to the top of the transition cavity 2, the water inlet 21 of the transition cavity 2 is communicated with the water outlet 22 of the transition cavity 2 through the shaft hole of the ferromagnetic sliding plug 23; the peripheral wall of the ferromagnetic sliding plug 23 is further provided with a ring groove 230, and when the ferromagnetic sliding plug 23 slides to the bottom of the switch cavity 2, the ring groove 230 is over against the water inlet 21; when the temperature of the kerosene 12 is lower than 40 ℃, the ferromagnetic sliding plug 11 descends along with the contraction of the kerosene, and at this time, the maximum suction force of the ferromagnetic sliding plug 11 to the ferromagnetic sliding plug 23 is smaller than the product of a standard atmospheric pressure and the horizontal projection area of the ring groove 230, so that the ferromagnetic sliding plug 23 can be lifted upwards by the external atmospheric pressure; when the temperature of the kerosene is higher than 45 ℃, the ferromagnetic sliding plug 11 rises along with the expansion of the kerosene, and at the moment, the minimum suction force of the ferromagnetic sliding plug 11 to the ferromagnetic sliding plug 23 is larger than the product of a standard atmospheric pressure and the horizontal projection area of the ring groove 230.
Similar to the first embodiment, the straw body 4 is inserted into and pulled out of the upper end of the transition chamber 2, so that the straw body 4 can be directly used to smoothly suck liquid when high-temperature protection is not required.
When the liquid temperature is higher, the expansion force of kerosene 12 in the closed cavity 1 is far greater than that of air in the closed cavity 1, so that the ferromagnetic sliding plug 11 rises, the magnetic attraction force between the ferromagnetic sliding plug 11 and the ferromagnetic body 32 or the ferromagnetic sliding plug 23 is increased to be larger than the upward acting force of atmospheric pressure on the ferromagnetic body 32 or the ferromagnetic sliding plug 23, the water outlet 22 or the water inlet 21 of the transition cavity 2 is blocked, and the straw cannot absorb high-temperature liquid; when the liquid temperature is lower, the magnetic attraction between the ferromagnetic sliding plug 11 and the ferromagnetic body 32 or the ferromagnetic sliding plug 23 is reduced to a lower level due to the reduction of the ferromagnetic sliding plug 11, so that the atmospheric pressure can push up the ferromagnetic body 32 or the ferromagnetic sliding plug 23, and the straw can normally absorb the low-temperature liquid.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.
Claims (1)
1. The utility model provides a straw is prevented scalding by mother and infant which characterized in that: the suction pipe comprises a metal closed cavity (1) at the lowest end, wherein a strong magnetic sliding plug (11) capable of sliding up and down along the axis of the suction pipe is arranged in the metal closed cavity (1); kerosene (12) is sealed in a sealed area below the strong magnetic sliding plug (11), and air (13) is sealed in a sealed area above the strong magnetic sliding plug (11); a transition cavity (2) is arranged above the metal closed cavity (1), a water inlet hole (21) is formed in the side wall of the transition cavity (2), and a water outlet hole (22) is formed in the upper end of the transition cavity (2); a switch cavity (3) is further arranged above the transition cavity (2), a suction pipe main body (4) is connected above the switch cavity (3), a water passing plate (31) is arranged between the switch cavity (3) and the suction pipe main body (4), and a ferromagnetic body (32) is restrained in the switch cavity (3) by the water passing plate (31); when the ferromagnetic body (32) falls to the bottom of the switch cavity (3), the water outlet hole (22) above the transition cavity (2) is just blocked, and when the ferromagnetic body (32) rises to the top of the switch cavity, the water passing plate (31) is not blocked; when the temperature of the kerosene (12) is lower than 40 ℃, the strong magnetic sliding plug (11) descends along with the contraction of the kerosene, and the maximum suction force of the strong magnetic sliding plug (11) to the ferromagnetic body (32) is smaller than the product of standard atmospheric pressure and the area of the water outlet hole (22); when the temperature of the kerosene (12) is higher than 45 ℃, the strong magnetic sliding plug (11) rises along with the expansion of the kerosene, and the minimum suction force of the strong magnetic sliding plug (11) to the ferromagnetic body (32) is larger than the product of a standard atmospheric pressure and the area of the water outlet hole (22); the water passing plate (31) is composed of a porous plate densely distributed with through holes; the suction pipe main body (4) can be plugged into the upper end of the switch cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710946825.6A CN107928320B (en) | 2016-12-16 | 2016-12-16 | Mother and infant prevents scalding straw |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168324.1A CN106490933B (en) | 2016-12-16 | 2016-12-16 | Mother and baby's scald-proof straw |
| CN201710946825.6A CN107928320B (en) | 2016-12-16 | 2016-12-16 | Mother and infant prevents scalding straw |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611168324.1A Division CN106490933B (en) | 2016-12-16 | 2016-12-16 | Mother and baby's scald-proof straw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107928320A CN107928320A (en) | 2018-04-20 |
| CN107928320B true CN107928320B (en) | 2020-04-21 |
Family
ID=58331164
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611168324.1A Expired - Fee Related CN106490933B (en) | 2016-12-16 | 2016-12-16 | Mother and baby's scald-proof straw |
| CN201710846904.XA Active CN107374270B (en) | 2016-12-16 | 2016-12-16 | Scald-proof straw |
| CN201710946825.6A Expired - Fee Related CN107928320B (en) | 2016-12-16 | 2016-12-16 | Mother and infant prevents scalding straw |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611168324.1A Expired - Fee Related CN106490933B (en) | 2016-12-16 | 2016-12-16 | Mother and baby's scald-proof straw |
| CN201710846904.XA Active CN107374270B (en) | 2016-12-16 | 2016-12-16 | Scald-proof straw |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN106490933B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998342B (en) * | 2019-05-22 | 2020-12-22 | 南通谷目餐饮管理有限公司 | Scald-proof liquid food straw for children |
| CN110037512A (en) * | 2019-06-03 | 2019-07-23 | 上海榛屹家居用品有限公司 | A kind of antispray thermostat valve |
| CN111466768B (en) * | 2020-04-16 | 2022-10-11 | 连云港佰腾科技信息有限公司 | Instant hot drink is with preventing scalding straw |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6457612B1 (en) * | 2001-10-12 | 2002-10-01 | Amphastar Pharmaceuticals Inc. | Sealable and manipulable pre-filled disposable pipette |
| US7100838B1 (en) * | 2004-06-17 | 2006-09-05 | Epstein Stephen T | Novelty straw and associated method of operation |
| CN101461644A (en) * | 2009-01-08 | 2009-06-24 | 吴小东 | Scald-proof straw |
| CN201834825U (en) * | 2010-05-11 | 2011-05-18 | 尹德翠 | Membrane filtration magnetization drinking water suction tube filter |
| CN202234444U (en) * | 2011-09-09 | 2012-05-30 | 盛雨点 | Anti-burn drinkware |
| CN202919798U (en) * | 2012-08-07 | 2013-05-08 | 许力 | Portable suction head |
| CN203000374U (en) * | 2012-12-03 | 2013-06-19 | 张富荃 | Heating suction pipe |
| CN203676770U (en) * | 2013-11-27 | 2014-07-02 | 深圳市开颜医疗器械有限公司 | Straw |
| CN203934973U (en) * | 2014-06-26 | 2014-11-12 | 台州弘海纸制品科技有限公司 | Automatic anti-scalding dixie cup |
| CN104433658B (en) * | 2014-09-25 | 2016-08-24 | 义乌市蒙特日用品有限公司 | A kind of Double-layer sucker |
| CN105686580A (en) * | 2014-11-26 | 2016-06-22 | 广西大学 | Scald-preventing straw |
| CN204445213U (en) * | 2015-03-11 | 2015-07-08 | 丁丹巧 | A kind of anti-scald suction pipe |
| CN104905641A (en) * | 2015-07-11 | 2015-09-16 | 鲁杨 | Sanitary straw |
| CN205761245U (en) * | 2016-05-29 | 2016-12-07 | 北京物资学院 | A kind of heat treated sample processing means |
| CN207499971U (en) * | 2017-11-17 | 2018-06-15 | 吉林大学 | A kind of expansion water tank cover, the expansion tank of the anti-scald in engine high-temperature |
-
2016
- 2016-12-16 CN CN201611168324.1A patent/CN106490933B/en not_active Expired - Fee Related
- 2016-12-16 CN CN201710846904.XA patent/CN107374270B/en active Active
- 2016-12-16 CN CN201710946825.6A patent/CN107928320B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106490933A (en) | 2017-03-15 |
| CN107374270B (en) | 2019-01-04 |
| CN107374270A (en) | 2017-11-24 |
| CN106490933B (en) | 2017-12-01 |
| CN107928320A (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107928320B (en) | Mother and infant prevents scalding straw | |
| CN109157697A (en) | A kind of infusion-bottle hanging stand box of automatic decanting | |
| CN209863165U (en) | Temperature-sensing valve structure and anti-scald water cup using same | |
| CN208640295U (en) | Antispray suction pipe cup | |
| CN102349780A (en) | Suction tube capable of preventing hot drink from being sucked | |
| CN204910143U (en) | Feeding bottle safe in utilization | |
| CN110126890A (en) | A kind of serving trolley with heat insulation function | |
| CN203724476U (en) | Special medicine drinking cup for nursing of traditional Chinese medicine department | |
| CN203842036U (en) | Self-locking child transfusion bottle stopper | |
| CN210860026U (en) | Temperature sensing anti-scald valve | |
| CN211327254U (en) | Lactation device for obstetrical department | |
| CN211459813U (en) | Teathings external member | |
| CN209734555U (en) | Silica gel bottle body with air return valve and feeding bottle | |
| CN205457759U (en) | Soup plate improves structure | |
| CN204521609U (en) | A kind of Traditional Chinese medicine decocting device | |
| CN202312989U (en) | Thermos rack | |
| CN213488205U (en) | Intelligent vacuum cup | |
| CN218635803U (en) | Magnetic liquid level monitoring structure and micro-pressure kettle | |
| CN202554621U (en) | Anti-blood return transfusion tube | |
| CN201353067Y (en) | Water cup capable of automatic dissolution at given temperature | |
| CN202044005U (en) | Plastic cup lined with ceramic | |
| CN201782632U (en) | Anti-scald thermos pot | |
| CN209987942U (en) | Serving trolley with heat preservation function | |
| CN203842037U (en) | Structure for making bottle stopper capable of being automatically sealed under unattended condition and used for child infusion | |
| CN202665329U (en) | Overflowing-proof food processor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yuan Jing Inventor after: Other inventor requests not to publish the name Inventor before: Request for anonymity |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200326 Address after: 6 women and children hospital of Shandong province 266000 Qingdao Shibei Tongfu Road Applicant after: QINGDAO CITY WOMEN AND CHILDREN'S HOSPITAL (QINGDAO MATERNAL AND CHILD HEALTH HOSPITAL, QINGDAO DISABLED CHILDREN MEDICAL REHABILITATION CENTER, QINGDAO NEWBORN DISEASE SCREENING CENTER) Address before: 230000 Woye Garden Commercial Building B-2705, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Applicant before: HEFEI LONGJINGLING INFORMATION TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |