CN203577171U - Anti-gas and dust-proof mask - Google Patents
Anti-gas and dust-proof mask Download PDFInfo
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- CN203577171U CN203577171U CN201320705865.9U CN201320705865U CN203577171U CN 203577171 U CN203577171 U CN 203577171U CN 201320705865 U CN201320705865 U CN 201320705865U CN 203577171 U CN203577171 U CN 203577171U
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- mask
- proof
- breathing
- dust
- side eyeglass
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Abstract
The utility model provides an anti-gas and dust-proof mask. The anti-gas and dust-proof mask comprises a mask body, a breathing device, two filters, a lower bracket, a pair of goggles and a mask rubber belt, wherein a breathing device installation hole is formed in the mask body; two filter installation holes are formed in two sides of the breathing device installation hole in the mask body; the breathing device is arranged in the breathing device installation hole; the two filters are arranged in the two filter installation holes respectively; the pair of goggles is arranged on the mask body; the lower bracket is arranged in the mask body; the two ends of the mask rubber belt are connected with the two ends of one side, close to the goggles, of the mask body. The anti-gas and dust-proof mask provided by the utility model is easy to disassemble and assemble, convenient to carry and wear, and lighter in weight; a wearer does not feel uncomfortable; moreover, the anti-gas and dust-proof mask is also provided with the detachable goggles, lenses can be conveniently replaced, the pupil distance can be conveniently adjusted, and requirements of patients suffering from different refractive errors for wearing and labor protection can be met.
Description
Technical field
The utility model relates to safety protection field, relates in particular to a kind of anti-poison dust-proof mask.
Background technology
At present military or civilian anti-poison dust-proof mask is generally all comprised of mask, breathing mouth, filter and rubber strip, breathing mouth is installed in mask, filter is arranged at the both sides of breathing mouth, and use rubber strip mask to be worn on the head of wearer, play the effect of filtering the air that enters mask, prevent that wearer from sucking poison gas or dust.Some existing anti-poison dust-proof mask also can be equipped with protective ocular, and protective ocular, mask and miscellaneous part are made into integration, and when wearing a mask, together protective ocular is put on, and prevents that poison gas or dust from entering the eyes of wearer.But this anti-poison dust-proof mask with protective ocular, because protective ocular and mask are integrated, can only adapt to by the complete anti-poison dust-proof mask of customization the different situations of different wearers, and cost is high, and wastes time and energy, inconvenience; And the volume in kind of this anti-poison dust-proof mask is larger, and can not dismantle and assemble having under the different severe working environment such as flue dust, poison gas, cause taking up room large, weight is not larger yet, portable and dress, and easily allows wearer have sense of discomfort; In addition, the protective ocular of this anti-poison dust-proof mask, for zero diopter designs, is unsuitable for ametropia patient and dresses.
Utility model content
The utility model provides a kind of anti-poison dust-proof mask, to adapt to different wearers, and particularly ametropia patient, the difference under different operating environment is dressed and the anti-demand of labor.
For achieving the above object, the utility model provides a kind of anti-poison dust-proof mask, it comprises mask, breathing equipment, two filters, bottom bracket, protective ocular and mask rubber strip, described mask is provided with breathing equipment installing port, on described mask, the both sides of breathing equipment installing port are also provided with two filter installing ports, described breathing equipment is arranged in described breathing equipment installing port, described two filters are arranged at respectively in described two filter installing ports, described protective ocular is arranged on described mask, described bottom bracket is arranged in described mask, the two ends of described mask rubber strip are connected with the two ends near described protective ocular one side on described mask respectively.
Further, described breathing equipment comprises breathes mouth, breathing lid and rubber mouth, described breathing mouth penetrates in described breathing equipment installing port from described mask, and be fixed in described mask, described rubber mouth is arranged in described breathing lid, and described breathing lid is connected near a side of described breathing equipment installing port with described breathing mouth.
Further, described breathing equipment also comprises large rubber blanket, and described large rubber blanket is arranged between described breathing lid and described breathing equipment installing port.
Further, described breathing equipment also comprises preposition protective cover, and described preposition protective cover is arranged at described breathing and covers, and wraps the side of described breathing lid away from described breathing mouth.
Further, described anti-poison dust-proof mask also comprises two small rubber pads, and described two small rubber pads are arranged at respectively between described two filters and described two filter installing ports.
Further, described anti-poison dust-proof mask also comprises two filter pads, and described two filter pads are arranged at respectively between described two filter installing ports and described breathing mouth.
Further, described anti-poison dust-proof mask also comprises lower clip, and the two ends of described lower clip are connected with the two ends near described protective ocular one side on described mask respectively, and described lower clip is held described bottom bracket.
Further, described protective ocular comprises glasses and picture frame, and described picture frame is arranged on described mask, and described picture frame is provided with glasses groove, and described glasses can insert in described glasses groove.
Further, described protective ocular is detachable connection with the connected mode of described mask.
Further, be also provided with draw-in groove on described picture frame, be also provided with the latch corresponding with described draw-in groove position on described mask, described latch can insert in described draw-in groove and with described picture frame and be fixedly connected with.
Further, on described protective ocular, be also provided with button, press described button and can untie being connected of described latch and described draw-in groove.
Further, described protective ocular also comprises plastic packaging cover, and described glasses insert in described glasses groove, and described plastic packaging cover is buckled on described picture frame, and seals described glasses groove.
Further, described glasses comprise left side eyeglass, right side eyeglass and connecting ring, described left side eyeglass is provided with left side eyeglass screw, described right side eyeglass is provided with right side eyeglass screw, described connecting ring is hollow circular cylinder, described left side eyeglass screw and right side eyeglass screw link together by described connecting ring, described connecting ring is provided with the internal thread matching with the external screw thread of described left side eyeglass screw near one end of described left side eyeglass screw, described connecting ring is provided with the internal thread matching with the external screw thread of described right side eyeglass screw near one end of described right side eyeglass screw, described connecting ring can make when rotated described left side eyeglass and right side eyeglass near or away from, regulate the distance between described left side eyeglass and right side eyeglass.
Further, described anti-poison dust-proof mask also comprises eyeglass storage box, and the left side eyeglass of the different number of degrees and right side eyeglass are all deposited in described eyeglass storage box.
Further, described protective ocular also comprises protective ocular rubber strip, and the two ends of described protective ocular rubber strip are connected with the two ends of described picture frame respectively.
Compared with prior art, the utlity model has following beneficial effect:
The anti-poison dust-proof mask that the utility model provides separates its parts form on mask in design, all plasticity of connecting portion between each parts, be easy to dismounting and the assembling of its parts, be convenient to carrying and dressing of this anti-poison dust-proof mask, the weight of this anti-poison dust-proof mask is also lighter, can not allow wearer have sense of discomfort; And this anti-poison dust-proof mask is also furnished with dismountable protective ocular, can change easily eyeglass and adjust interpupillary distance, can meet different wearers, particularly ametropia patient, the difference under different operating environment is dressed and the anti-demand of labor.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
The expanded view of each parts in the anti-poison dust-proof mask that Fig. 1 provides for the utility model embodiment;
The structural representation of the anti-poison dust-proof mask that Fig. 2 provides for the utility model embodiment.
In Fig. 1 and Fig. 2,
1: mask; 11: breathe assembling installing port; 12: filter installing port; 13: latch; 2: breathing equipment; 21: breathe mouth; 22: breathe lid; 23: rubber mouth; 24: large rubber blanket; 25: preposition protective cover; 3: filter; 4: bottom bracket; 5: protective ocular; 51: glasses; 511: left side eyeglass; 512: right side eyeglass; 513: left side eyeglass screw; 514: right side eyeglass screw; 515: connecting ring; 52: picture frame; 521: glasses groove; 522: draw-in groove; 523: button; 53: protective ocular rubber strip; 54: plastic packaging cover; 6: mask rubber strip; 7: small rubber pad; 8: filter pad; 9: lower clip.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the anti-poison dust-proof mask the utility model proposes is described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment lucidly.
Core concept of the present utility model is, a kind of anti-poison dust-proof mask is provided, it comprises mask, breathing equipment, two filters, bottom bracket, protective ocular and mask rubber strip, described mask is provided with breathing equipment installing port, on described mask, the both sides of breathing equipment installing port are also provided with two filter installing ports, described breathing equipment is arranged in described breathing equipment installing port, described two filters are arranged at respectively in described two filter installing ports, described protective ocular is arranged on described mask, described bottom bracket is arranged in described mask, the two ends of described mask rubber strip are connected with the two ends near described protective ocular one side on described mask respectively.The anti-poison dust-proof mask that the utility model provides separates its parts form on mask in design, all plasticity of connecting portion between each parts, be easy to dismounting and the assembling of its parts, be convenient to carrying and dressing of this anti-poison dust-proof mask, the weight of this anti-poison dust-proof mask is also lighter, can not allow wearer have sense of discomfort; And this anti-poison dust-proof mask is also furnished with dismountable protective ocular, can change easily eyeglass and adjust interpupillary distance, can meet different wearers, particularly ametropia patient, the difference under different operating environment is dressed and the anti-demand of labor.
Please refer to Fig. 1 and Fig. 2, the expanded view of each parts in the anti-poison dust-proof mask that Fig. 1 provides for the utility model embodiment; The structural representation of the anti-poison dust-proof mask that Fig. 2 provides for the utility model embodiment.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of anti-poison dust-proof mask, it comprises mask 1, breathing equipment 2, two filters 3, bottom bracket 4, protective ocular 5 and mask rubber strip 6, described mask 1 is provided with breathing equipment installing port 11, on described mask 1, the both sides of breathing equipment installing port 11 are also provided with two filter installing ports 12, described breathing equipment 2 is arranged in described breathing equipment installing port 11, described two filters 3 are arranged at respectively in described two filter installing ports 12, described protective ocular 5 is arranged on described mask 1, described bottom bracket 4 is arranged in described mask 1, described bottom bracket 4 in described mask 1, surround described breathing mouth 21 below and both sides, the two ends of described mask rubber strip 6 are connected with the two ends near described protective ocular 5 one sides on described mask 1 respectively.
Further, described breathing equipment 2 comprises to be breathed mouth 21, breathes and cover 22 and rubber mouth 23, described breathing mouth 21 penetrates in described breathing equipment installing port 11 from described mask 1, and be fixed in described mask 1, described rubber mouth 23 is arranged in described breathing lid 22, described breathing lid 22 is connected near a side of described breathing equipment installing port 11 with described breathing mouth 21, and described breathing lid 22 and rubber mouth 23 can filter out the poison gas or the dust that enter mask, so that wearer can be breathed.
Further, described breathing equipment 2 also comprises large rubber blanket 24, described large rubber blanket 24 is arranged between described breathing lid 22 and described breathing equipment installing port 11, described large rubber blanket 24 can prevent poison gas or dust from breathe cover 22 and breathing equipment installing port 11 between enter in mask 1, increased the tightness of this anti-poison dust-proof mask.
Further, described breathing equipment 2 also comprises preposition protective cover 25, described preposition protective cover 25 is arranged on described breathing lid 22, and wrap the side of described breathing lid 22 away from described breathing mouth 21, described preposition protective cover 25 can seal breathing lid 22 when not using this anti-poison dust-proof mask, in order to avoid dust enters in the breathing mouth 21 in mask 1.
Further, described anti-poison dust-proof mask also comprises two small rubber pads 7, described two small rubber pads 7 are arranged at respectively between described two filters 3 and described two filter installing ports 12, described small rubber pad 7 can prevent that poison gas or dust from entering in mask 1 between filter 3 and filter installing port 12, increased the tightness of this anti-poison dust-proof mask.
Further, described anti-poison dust-proof mask also comprises two filter pads 8, described two filter pads 8 are arranged at respectively between described two filter installing ports 12 and described breathing mouth 21, described filter pad 8 can strengthen the filter effect of filter 3, wearer filters out poison gas or dust that major part enters mask, so that can be breathed more swimmingly.
Further, described anti-poison dust-proof mask also comprises lower clip 9, the two ends of described lower clip 9 are connected with the two ends near described protective ocular 5 one sides on described mask 1 respectively, described lower clip 9 is held described bottom bracket 4, by described lower clip 9, hold described bottom bracket 4, make only need untie when this anti-poison dust-proof mask of dismounting and bottom bracket 4 can be disassembled simultaneously being connected just between lower clip 9 and mask 1, the disassemble and assemble work of this anti-poison dust-proof mask of being more convenient for.
Further, described protective ocular 5 comprises glasses 51 and picture frame 52, and described picture frame 52 is arranged on described mask 1, and described picture frame 52 is provided with glasses groove 521, and described glasses 51 can insert in described glasses groove 521, and are fixed in described glasses groove 521.
Further, described protective ocular 5 is detachable connection with the connected mode of described mask 1.
Concrete, on described picture frame 52, be also provided with draw-in groove 522, on described mask 1, be also provided with the latch 13 corresponding with described draw-in groove 522 positions, described latch 13 can insert in described draw-in groove 522 and with picture frame 52 and be fixedly connected with, on described protective ocular 5, be also provided with button 523, in the present embodiment, described draw-in groove 522 is described button 523, press described button 523 and can untie being connected of described latch 13 and described draw-in groove 522, the dismounting of protective ocular 5 is convenient in such design.
Further, described protective ocular 5 also comprises plastic packaging cover 54, described glasses 51 insert in described glasses groove 521, described plastic packaging cover 54 is buckled on described picture frame 52, and sealing described glasses groove 521, described glasses 51 have certain space that moves left and right in described picture frame 52, after moving into place, by described plastic packaging cover 54 being buckled on the glasses groove 521 and glasses 51 on described picture frame 52, described glasses 51 are fixedly connected with described picture frame 52.
Further, described glasses 51 comprise left side eyeglass 511, right side eyeglass 512 and connecting ring 515, described left side eyeglass 511 is provided with left side eyeglass screw 513, described right side eyeglass 512 is provided with right side eyeglass screw 514, described connecting ring 515 is hollow circular cylinder, described left side eyeglass screw 513 links together by described connecting ring 515 with right side eyeglass screw 514, described connecting ring 515 is provided with the internal thread matching with the external screw thread of described left side eyeglass screw 513 near one end of described left side eyeglass screw 513, described connecting ring 515 is provided with the internal thread matching with the external screw thread of described right side eyeglass screw 514 near one end of described right side eyeglass screw 514, described connecting ring 515 can make when rotated described left side eyeglass 511 and right side eyeglass 512 near or away from, regulate the distance between described left side eyeglass 511 and right side eyeglass 512.
Particularly, when described connecting ring 515 is turned clockwise, described left side eyeglass screw 513 all moves to described connecting ring 515 center with right side eyeglass screw 514, described left side eyeglass 511 and right side eyeglass 512 are moved to the direction of connecting ring 515 simultaneously, the distance having furthered between left side eyeglass 511 and right side eyeglass 512, has reduced interpupillary distance; When described connecting ring 515 is rotated counterclockwise, described left side eyeglass screw 513 moves to the two ends of described connecting ring 515 with the trend of leaving described connecting ring 515 respectively with right side eyeglass screw 514, make described left side eyeglass 511 and right side eyeglass 512 simultaneously to moving away from the direction of connecting ring 515, increased the distance between left side eyeglass 511 and right side eyeglass 512, increased interpupillary distance, thereby made the protective ocular 5 of this anti-poison dust-proof mask can adapt to different ametropia patients' interpupillary distance.
In the present embodiment, the left side eyeglass 511 in glasses 51 and right side eyeglass 512 are separately made to replace eyeglass more easy, thereby make the protective ocular 5 of this anti-poison dust-proof mask can adapt to different ametropia patients' the eyes number of degrees.
Further, described anti-poison dust-proof mask also comprises eyeglass storage box (not shown), left side eyeglass 511 and the right side eyeglass 512 of the different number of degrees are all deposited in described eyeglass storage box, in order to replacing at any time, thereby make the protective ocular 5 of this anti-poison dust-proof mask can adapt to different ametropia patients' the eyes number of degrees.
Further, described protective ocular 5 also comprises protective ocular rubber strip 53, the two ends of described protective ocular rubber strip 53 are connected with the two ends of described picture frame 52 respectively, the same with mask rubber strip 6, also described protective ocular rubber strip 53 can be bound round on the head of wearer, thereby make the wearing of mask 1 in this anti-poison dust-proof mask and protective ocular 5 more firm.
In sum, the anti-poison dust-proof mask that the utility model embodiment provides separates its parts form on mask 1 in design, all plasticity of connecting portion between each parts, be easy to dismounting and the assembling of its parts, be convenient to carrying and dressing of this anti-poison dust-proof mask, the weight of this anti-poison dust-proof mask is also lighter, can not allow wearer have sense of discomfort; And this anti-poison dust-proof mask is also furnished with dismountable protective ocular 5, can change easily eyeglass and adjust interpupillary distance, can meet different wearers, particularly ametropia patient, the difference under different operating environment is dressed and the anti-demand of labor.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are changed and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (14)
1. an anti-poison dust-proof mask, it is characterized in that, comprise mask, breathing equipment, two filters, bottom bracket, protective ocular and mask rubber strip, described mask is provided with breathing equipment installing port, on described mask, the both sides of breathing equipment installing port are also provided with two filter installing ports, described breathing equipment is arranged in described breathing equipment installing port, described two filters are arranged at respectively in described two filter installing ports, described protective ocular is arranged on described mask and with described mask is detachable and is connected, described bottom bracket is arranged in described mask, the two ends of described mask rubber strip are connected with the two ends near described protective ocular one side on described mask respectively.
2. anti-poison dust-proof mask according to claim 1, it is characterized in that, described breathing equipment comprises breathes mouth, breathing lid and rubber mouth, described breathing mouth penetrates in described breathing equipment installing port from described mask, and be fixed in described mask, described rubber mouth is arranged in described breathing lid, and described breathing lid is connected near a side of described breathing equipment installing port with described breathing mouth.
3. anti-poison dust-proof mask according to claim 2, is characterized in that, described breathing equipment also comprises large rubber blanket, and described large rubber blanket is arranged between described breathing lid and described breathing equipment installing port.
4. anti-poison dust-proof mask according to claim 2, is characterized in that, described breathing equipment also comprises preposition protective cover, and described preposition protective cover is arranged at described breathing and covers, and wraps the side of described breathing lid away from described breathing mouth.
5. anti-poison dust-proof mask according to claim 1, is characterized in that, also comprises two small rubber pads, and described two small rubber pads are arranged at respectively between described two filters and described two filter installing ports.
6. anti-poison dust-proof mask according to claim 2, is characterized in that, also comprises two filter pads, and described two filter pads are arranged at respectively between described two filter installing ports and described breathing mouth.
7. anti-poison dust-proof mask according to claim 1, is characterized in that, also comprises lower clip, and the two ends of described lower clip are connected with the two ends near described protective ocular one side on described mask respectively, and described lower clip is held described bottom bracket.
8. according to the anti-poison dust-proof mask described in claim 1 to 7 any one, it is characterized in that, described protective ocular comprises glasses and picture frame, and described picture frame is arranged on described mask, and described picture frame is provided with glasses groove, and described glasses can insert in described glasses groove.
9. anti-poison dust-proof mask according to claim 8, is characterized in that, is also provided with draw-in groove on described picture frame, is also provided with the latch corresponding with described draw-in groove position on described mask, and described latch can insert in described draw-in groove and with described picture frame and be fixedly connected with.
10. anti-poison dust-proof mask according to claim 9, is characterized in that, is also provided with button on described protective ocular, presses described button and can untie being connected of described latch and described draw-in groove.
11. anti-poison dust-proof masks according to claim 8, is characterized in that, described protective ocular also comprises plastic packaging cover, and described glasses insert in described glasses groove, and described plastic packaging cover is buckled on described picture frame, and seal described glasses groove.
12. anti-poison dust-proof masks according to claim 8, it is characterized in that, described glasses comprise left side eyeglass, right side eyeglass and connecting ring, described left side eyeglass is provided with left side eyeglass screw, described right side eyeglass is provided with right side eyeglass screw, described connecting ring is hollow circular cylinder, described left side eyeglass screw and right side eyeglass screw link together by described connecting ring, described connecting ring is provided with the internal thread matching with the external screw thread of described left side eyeglass screw near one end of described left side eyeglass screw, described connecting ring is provided with the internal thread matching with the external screw thread of described right side eyeglass screw near one end of described right side eyeglass screw.
13. anti-poison dust-proof masks according to claim 12, is characterized in that, also comprise eyeglass storage box, and the left side eyeglass of the different number of degrees and right side eyeglass are all deposited in described eyeglass storage box.
14. anti-poison dust-proof masks according to claim 8, is characterized in that, described protective ocular also comprises protective ocular rubber strip, and the two ends of described protective ocular rubber strip are connected with the two ends of described picture frame respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705865.9U CN203577171U (en) | 2013-11-08 | 2013-11-08 | Anti-gas and dust-proof mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705865.9U CN203577171U (en) | 2013-11-08 | 2013-11-08 | Anti-gas and dust-proof mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203577171U true CN203577171U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320705865.9U Expired - Fee Related CN203577171U (en) | 2013-11-08 | 2013-11-08 | Anti-gas and dust-proof mask |
Country Status (1)
| Country | Link |
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| CN (1) | CN203577171U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103550875A (en) * | 2013-11-08 | 2014-02-05 | 中国人民解放军第四一一医院 | Dustproof gas mask |
| CN106390319A (en) * | 2016-10-31 | 2017-02-15 | 山西新华化工有限责任公司 | Full-face type single tank comprehensive protection mask |
| CN107866013A (en) * | 2017-11-24 | 2018-04-03 | 北京欧美中科学技术研究院 | A kind of more filter box chemistry gas masks being conveniently replaceable |
| CN108273209A (en) * | 2018-01-31 | 2018-07-13 | 山东联星能源集团有限公司 | The chemical experiment breathing mask that wearable glasses use |
| CN110997085A (en) * | 2017-08-17 | 2020-04-10 | C·哈恩 | Eyewear with adjustable bridging means |
| CN111939492A (en) * | 2020-07-02 | 2020-11-17 | 张琦 | Medical treatment department of anesthesia uses virus protective face mask |
-
2013
- 2013-11-08 CN CN201320705865.9U patent/CN203577171U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103550875A (en) * | 2013-11-08 | 2014-02-05 | 中国人民解放军第四一一医院 | Dustproof gas mask |
| CN103550875B (en) * | 2013-11-08 | 2016-04-06 | 中国人民解放军第四一一医院 | Anti-poison dust-proof mask |
| CN106390319A (en) * | 2016-10-31 | 2017-02-15 | 山西新华化工有限责任公司 | Full-face type single tank comprehensive protection mask |
| CN110997085A (en) * | 2017-08-17 | 2020-04-10 | C·哈恩 | Eyewear with adjustable bridging means |
| CN107866013A (en) * | 2017-11-24 | 2018-04-03 | 北京欧美中科学技术研究院 | A kind of more filter box chemistry gas masks being conveniently replaceable |
| CN108273209A (en) * | 2018-01-31 | 2018-07-13 | 山东联星能源集团有限公司 | The chemical experiment breathing mask that wearable glasses use |
| CN111939492A (en) * | 2020-07-02 | 2020-11-17 | 张琦 | Medical treatment department of anesthesia uses virus protective face mask |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20211108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |