CN203987840U - Absorption type self-moving device - Google Patents
Absorption type self-moving device Download PDFInfo
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- CN203987840U CN203987840U CN201420415697.4U CN201420415697U CN203987840U CN 203987840 U CN203987840 U CN 203987840U CN 201420415697 U CN201420415697 U CN 201420415697U CN 203987840 U CN203987840 U CN 203987840U
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- absorption
- moving device
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- absorption type
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Abstract
A kind of absorption type self-moving device, be provided with support (100), walking unit (300) and functional unit, support bottom includes cavity (110), described cavity is connected with vacuum source (400), be provided with in the outside of described cavity for the black box of absorption surface sealing, between described black box and absorption surface, after sealing, form vacuum chamber with described cavity, described black box is by elastic telescopic part and described support bottom connection.The utility model by arranging elastic telescopic part between black box and support, simultaneously by the setting of skirt border structure, and selection to the less flexible material of coefficient of friction, at the poor absorption surface of sealed environment, make shirt rim directly be subject to atmospheric effect, improve the sealing of vacuum chamber, do not hinder the walking of absorption type self-moving device simultaneously; The utility model is simple in structure but can effectively absorb unnecessary pressure, in normal walking and safety absorption, makes absorption affinity and frictional force reach balance.
Description
Technical field
The utility model relates to a kind of absorption type self-moving device, belongs to daily small household appliances manufacturing technology field.
Background technology
Along with human lives's intellectuality day by day, absorption type self-moving device taking window wiping robot as representative is used more and more widely, therefore, how to make window wiping robot become the most important thing to product requirement different on glass can work safely, normally.Fig. 1 is the structural representation of existing window wiping robot.As shown in Figure 1, existing window wiping robot A mainly comprises support 100 and is arranged on the rag 200 on support 100, under the effect of vacuum source 400, be adsorbed on glass surface, and rely on walking unit 300 and be arranged on its outside Timing Belt (not shown) and complete walking action.Analyze from the operation principle angle of window wiping robot, if window wiping robot A wants to walk on glass surface B, obviously need to meet the following conditions: 1, in the cabin of window wiping robot, keep enough vacuum, flows, just can make body tightly be adsorbed on glass surface B; 2, the Timing Belt that is coated on walking unit 300 outer surfaces must provide enough power, that is: frictional force, overcomes body deadweight, rag and glass frictional resistance and other resistances, guarantees that body walks and do not fall down on glass surface.Want to make body to walk on glass surface and can reduce its frictional resistance, can, by use the rag material that coefficient of friction is little to contact with glass surface as far as possible, can also realize by reducing rag and glass surface pressure.As shown in Figure 1, want to make the body of window wiping robot A to be tightly adsorbed on glass surface B above, must keep enough vacuum, but along with vacuum strengthens, can cause again the frictional force between rag 200 and glass surface B to increase, the movement of obstruction robot; If vacuum is too small, although can reduce the frictional force between rag 200 and glass surface B, but can cause suction inadequate, cause body easily to fall, impact is normally used.
Utility model content
Technical problem to be solved in the utility model is for the deficiencies in the prior art, a kind of absorption type self-moving device is provided, by elastic telescopic part is set between black box and support, ensure that increment that in the time that vacuum strengthens black box is subject to the holding power of absorption surface is less than walking unit and is subject to the increment of absorption surface holding power; Simultaneously by the setting of skirt border structure, and selection to the less flexible material of coefficient of friction, at the poor absorption surface of sealed environment, make shirt rim directly be subject to atmospheric effect, improve the sealing of vacuum chamber, do not hinder the walking of absorption type self-moving device simultaneously; The utility model is simple in structure but can effectively absorb unnecessary pressure, in normal walking and safety absorption, makes absorption affinity and frictional force reach balance.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of absorption type self-moving device, be provided with support, walking unit and functional unit, support bottom includes cavity, described cavity is connected with vacuum source, be provided with in the outside of described cavity for the black box of absorption surface sealing, between described black box and absorption surface, after sealing, form vacuum chamber with described cavity, described black box is by elastic telescopic part and described support bottom connection.
For the ease of the walking of absorption type self-moving device, described walking unit is arranged on the inside of described cavity.
In addition, described elastic telescopic part is positioned at described internal vacuum chamber.
If described absorption type self-moving device is glass-cleaning robot, described functional unit is rag, and described black box is by rag and absorption surface sealing.
For the poor absorption surface of sealed environment, described black box extends to form shirt rim towards the outside of vacuum chamber, and described shirt rim is towards a side and the absorption surface sealing of absorption surface, and a side that deviates from absorption surface is exposed in atmosphere.
While directly attaching sealing with absorption surface in described shirt rim, the less flexible material of described shirt rim employing coefficient of friction.
In addition, described shirt rim can also be by rag and absorption surface sealing.
More specifically, described black box mainly includes travel(l)ing rest, and described travel(l)ing rest is made up of flat part and lug boss, offers through hole on lug boss, the projection that described support bottom is convexly equipped with is through this through hole, and securing member is installed on described support spacing black box through described through hole; Described elastic telescopic part is spring, is set in the outside of described projection, and the upper/lower terminal of this spring is supported mutually with the upper surface of support bottom and lug boss respectively.
In order to reach good sealing effectiveness, on described flat part, be also provided with locating slot, one end of sealing ring is embedded in described locating slot, and sealing is supported in the bottom of the other end and support, makes the nested outer side seal being connected of support and black box.
Except above-mentioned glass-cleaning robot, described absorption type self-moving device can also be wall surface spraying machine people or waxing robot.
In sum, the utility model is by arranging elastic telescopic part between black box and support, ensures that increment that in the time that vacuum strengthens black box is subject to the holding power of absorption surface is less than walking unit and is subject to the increment of absorption surface holding power; Simultaneously by the setting of skirt border structure, and selection to the less flexible material of coefficient of friction, at the poor absorption surface of sealed environment, make shirt rim directly be subject to atmospheric effect, improve the sealing of vacuum chamber, do not hinder the walking of absorption type self-moving device simultaneously; The utility model is simple in structure but can effectively absorb unnecessary pressure, in normal walking and safety absorption, makes absorption affinity and frictional force reach balance.
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in detail.
Brief description of the drawings
Fig. 1 is the structural representation of existing window wiping robot;
Fig. 2 and Fig. 3 are respectively the position view of the utility model embodiment mono-window wiping robot under two states;
Fig. 4 is the local M structural representation of Fig. 2;
Fig. 5 is the utility model window wiping robot polycrystalline substance schematic diagram;
Fig. 6 is the structural representation of the utility model embodiment bis-window wiping robots;
Fig. 7 is the structural representation of the utility model embodiment tri-window wiping robots.
Detailed description of the invention
Embodiment mono-
Fig. 2 and Fig. 3 are respectively the position view of the utility model window wiping robot under two states; Fig. 4 is the M partial structurtes schematic diagram of Fig. 2; Fig. 5 is the utility model window wiping robot polycrystalline substance schematic diagram.As shown in Figures 2 to 5, in the present embodiment, described absorption type self-moving device is a kind of window wiping robot, comprises robot body, and body includes support 100, and support 100 is provided with walking unit 300 and is coated on its outside Timing Belt 310.Support 100 bottoms include cavity 110, and described cavity 110 and vacuum source 400 are communicated with mutually, in the periphery of described cavity 110, be arranged with for absorption surface, that is: the black box that glass surface B seals.Between described black box and absorption surface, after sealing, form vacuum chamber with described cavity 110, described black box is by elastic telescopic part and described support 100 bottom connections.As Fig. 2 known in conjunction with Fig. 3, for the ease of the walking of absorption type self-moving device, described walking unit 300 is arranged on the inside of described cavity 110.In addition, described elastic telescopic part is also positioned at the inside of described vacuum chamber.On support 100, be also provided with rag 200, rag 200 is connected with support 100 by travel(l)ing rest 500.Specifically from Fig. 2 and in conjunction with Fig. 4, described black box mainly includes travel(l)ing rest 500, specifically, travel(l)ing rest 500 is made up of flat part 511 and lug boss 512, on lug boss 512, offer through hole 5121, the projection 101 that support 100 is convexly equipped with is to the inside through this through hole 5121, and securing member 520 is fixed on support 100 spacing travel(l)ing rest 500 through through hole 5121, under normal circumstances, securing member 520 can adopt self-tapping screw or other conventional standard components.Described elastic telescopic part is spring, is provided with stand spring 530 in the outer cover of projection 101, and the upper/lower terminal of this stand spring 530 is supported mutually with the upper surface of support 100 inner sides and lug boss 512 respectively.Between support 100, travel(l)ing rest 500, body lower surface and glass surface B, form vacuum chamber, vacuum source 400 is for vacuumizing vacuum chamber.On flat part 511, be also provided with locating slot 513, one end of sealing ring 540 is embedded in described locating slot 513, and sealing is supported in the inside of the other end and support 100, makes the nested outer side seal being connected of support 100 and travel(l)ing rest 500, for the protection of the vacuum of vacuum chamber.It should be noted that; the specifically described a kind of black box of the present embodiment; in order to make technical scheme clearer; but should be using it as the restriction to the utility model protection domain, those skilled in the art can need to carry out corresponding change according to specific works and reach identical technique effect.For example, for the connected mode of travel(l)ing rest 500 and support 100, can on lug boss 512, projection be set, on support 100, correspondence is offered through hole, projection is spacing fixing by securing member through through hole, can play equally the effect that travel(l)ing rest is connected with support elasticity.Because the absorption type self-moving device in the present embodiment is glass-cleaning robot, the lower surface of the flat part 511 of described travel(l)ing rest 500 is also provided with working cell, described working cell is rag 200, rag 200 is pasted the lower surface at travel(l)ing rest 500, the concrete lower surface of position at flat part 511 of pasting, forms vacuum chamber with described cavity after sealing between described rag and absorption surface.
In conjunction with shown in Fig. 2 to Fig. 5, operation principle of the present utility model is described in detail.Do not fall down in order to ensure that window wiping robot is adsorbed on glass surface B, need to strengthen the suction of vacuum source 400, if according to conventional set-up mode, rag 200 is installed on support 100, the holding power that this process will inevitably make the Timing Belt 310 of window wiping robot and rag 200 be subject to glass surface B all can increase, according to f=uN, when the size that rag 200 is subject to the holding power of glass surface B can directly have influence on window wiping robot A walking, rag 200 is subject to the size of the frictional force of glass surface B.The present embodiment is by being arranged on the stand spring 530 in travel(l)ing rest 500, and the increment that makes rag 200 be subject to the holding power of glass surface B is less than Timing Belt 310 and is subject to the increment of the holding power of glass surface B.Optimal situation is: the increment of the suction of vacuum source 400 can be dispensed to Timing Belt 310 and be subject to the increment of the holding power of glass surface B completely, skids to solve Timing Belt 310, and rag 200 hinders the problem of window wiping robot A walking.When the size that is subject to the holding power of glass surface B due to Timing Belt 310 directly has influence on window wiping robot A walking, Timing Belt 310 is subject to the frictional force of glass surface B, and this frictional force is just being to provide the power of window wiping robot A walking.Like this, in the time that the suction of vacuum source 400 strengthens, it is very remarkable that Timing Belt 310 offers the increment of power of window wiping robot A walking, and it is not remarkable that rag 200 is subject to the increment of frictional force of glass surface B.Further, be adsorbed at window wiping robot A on the basis of not falling down on glass surface B, increase the suction of vacuum source 400, due to the inside and outside pressure difference of the vacuum chamber forming between support 100 and glass surface B, it is upper that window wiping robot A can be fitted in glass surface B more closely, is also that window wiping robot A has produced certain deformation, and this deformation makes the more close glass surface B of the upper surface of window wiping robot A, certainly, the amount of this deformation is very little.Accordingly, the holding power that Timing Belt 310 and rag 200 are subject to glass surface B also all can increase.For existing window wiping robot as shown in Figure 1, Timing Belt 310 and rag 200 can be regarded as to an overall rigid body, clearer in order to illustrate, regard Timing Belt and rag as an overall rigid body and be considered as ideal situation.In the time that the suction of vacuum source 400 increases, the holding power that Timing Belt 310 and rag 200 are subject to glass surface B increases in proportion.As Fig. 2 and in conjunction with as shown in Fig. 3, in the utility model, while increasing the suction of vacuum source 400, under the inside and outside pressure difference effect of vacuum chamber, it is upper that window wiping robot A also can be fitted in glass surface B more closely, same, window wiping robot A has produced certain deformation, but the now deformation of window wiping robot A is mainly reflected in the deformation of Timing Belt 310, the deformation of Timing Belt 310 drives stand spring 530 to produce deformation.So stand spring 530 produces corresponding deformation elastic force, it is inapparent that this deformation elastic force is applied on rag 200 through travel(l)ing rest 500, and rag 200 is just subject to altogether two power, one is the elastic force of stand spring 530 to it, another is the holding power of glass surface B to it, and the two equates, therefore, the amount that rag 200 is subject to the holding power of glass surface B and increases because of the increase of the suction of vacuum source 400 is inapparent.In other words, in the time that the suction of vacuum source 400 increases, be arranged on after stand spring 530 in travel(l)ing rest 500 is deflected into a certain degree and substantially remain unchanged, rag 200 is born the atmospheric pressure of continuous enhancing by Timing Belt 310.
Embodiment bis-
Fig. 6 is the structural representation of the utility model embodiment bis-window wiping robots.As shown in Figure 6, the structure of the present embodiment window wiping robot and embodiment mono-are basically identical, and its difference is, as required, the flat part 511 of described travel(l)ing rest 500 extends a shirt rim 550 towards the outside of vacuum chamber, described shirt rim 550 attaches sealing with absorption surface.The length that arranges of described rag 200 can be identical with the length of described travel(l)ing rest 500, that is to say, in the present embodiment, rag 200 is pasted the lower surface at travel(l)ing rest 500, and it is identical with flat part 511, lug boss 512 and shirt rim 550 threes' of travel(l)ing rest 500 total length that it pastes length.
Operation principle below in conjunction with a pair of the present embodiment of embodiment is described in detail.
In embodiment mono-, rag 200 is pasted the lower surface at travel(l)ing rest 500, plays effect clean and sealing, if the sealed environment of absorption surface is better simultaneously, as the glass surface of smoother, between rag 200 and absorption surface, only need less pressure can meet seal request.If but the sealed environment of absorption surface is poor, as more coarse wall, between rag 200 and absorption surface, need larger pressure just can meet seal request.The present embodiment is for the poor absorption surface of sealed environment, the outer rim that is travel(l)ing rest 500 at black box attaches absorption surface and extends a shirt rim 550, and rag 200 is pasted the lower surface in travel(l)ing rest and the extended shirt rim 550 of outer rim thereof, directly contact with glass surface B.In the course of the work, shirt rim 550 and paste at the rag 200 of its lower surface and be directly subject to atmospheric effect produces larger pressure, the low sealing that improves vacuum chamber largely between rag 200 and glass surface B.
Embodiment tri-
Fig. 7 is the structural representation of the utility model embodiment tri-window wiping robots.As shown in Figure 7, the present embodiment is the improvement on above-described embodiment two bases.The present embodiment also attaches absorption surface in the outer rim of travel(l)ing rest 500 and extends a shirt rim 550, but setting position and the embodiment bis-of rag 200 on travel(l)ing rest 500 distinguishes to some extent.Specifically, as shown in Figure 7, rag 200 that length is set is identical with the length sum of lug boss 512 with the flat part 511 of described travel(l)ing rest, and one end of described rag 200 is embedded in the inner side of described shirt rim 550, described rag 200 is concordant with the bottom surface of shirt rim 550.From the above, in the present embodiment, be to carry out enlarge active surface by skirt border structure equally, but different, in the present embodiment, the part contacting with glass surface B has comprised rag 200 and 550 two of shirt rims part.
In the course of the work, if the coefficient of friction of rag is larger, now just need to increase the pressure between rag and absorption surface by the elastic force that improves spring, although can meet the seal request of vacuum chamber, but can cause the frictional resistance of rag larger simultaneously, hinder walking.Therefore, described shirt rim 550 can adopt the flexible material that coefficient of friction is less, so, shirt rim 550 is directly subject to atmospheric effect, between shirt rim 550 and glass surface B, produce larger pressure, the low sealing that improves vacuum chamber largely, again because the coefficient of friction of shirt rim 550 is less, so be also unlikely to hinder the normal walking of glass-cleaning robot on glass surface B because producing very large frictional force between rag 200 and glass surface B.
Embodiment tetra-
It should be noted that, the kind of absorption type self-moving device is a lot, the glass-cleaning robot relating to, can also comprise: wall surface spraying machine people or waxing robot etc. in above-described embodiment.No matter be which kind of absorption type self-moving device, from a structural point, all must comprise support and walking unit, support bottom includes cavity, described cavity is connected with vacuum source, be provided with in the outside of described cavity for the black box of absorption surface sealing, between described black box and absorption surface, after sealing, form vacuum chamber with described cavity, described black box is by elastic telescopic part and described support bottom connection.Different classes of according to absorption type self-moving device, the concrete structure of working cell can be different, and as the glass-cleaning robot in embodiment mono-to three, rag both can be used as working cell, was again a part for black box or black box simultaneously.And for wall surface spraying machine people or waxing robot, its working cell is likely just to separate with black box, arrange separately.
Other guide in the present embodiment is same as the previously described embodiments, does not repeat them here.
In sum, the utility model provides a kind of absorption type self-moving device, taking the window wiping robot in embodiment as example, by the travel(l)ing rest arranging between base and rag, the frictional force of controlling between rag and glass surface can not increase on year-on-year basis along with linear the increasing of vacuum, that is: in the time that blower fan suction strengthens, Timing Belt provides the increment of power of window wiping robot walking remarkable, and that rag is subject to the increment of frictional force of glass surface is very little.
That is to say, the utility model is by arranging elastic telescopic part between black box and support, ensures that increment that in the time that vacuum strengthens black box is subject to the holding power of absorption surface is less than walking unit and is subject to the increment of absorption surface holding power; Simultaneously by the setting of skirt border structure, and selection to the less flexible material of coefficient of friction, at the poor absorption surface of sealed environment, make shirt rim directly be subject to atmospheric effect, improve the sealing of vacuum chamber, do not hinder the walking of absorption type self-moving device simultaneously; The utility model is simple in structure but can effectively absorb unnecessary pressure, in normal walking and safety absorption, makes absorption affinity and frictional force reach balance.
Claims (10)
1. an absorption type self-moving device, be provided with support (100), walking unit (300) and functional unit, support bottom includes cavity (110), described cavity is connected with vacuum source (400), be provided with in the outside of described cavity for the black box of absorption surface sealing, between described black box and absorption surface, after sealing, form vacuum chamber with described cavity, it is characterized in that, described black box is by elastic telescopic part and described support bottom connection.
2. absorption type self-moving device as claimed in claim 1, is characterized in that, described walking unit (300) is arranged on the inside of described cavity.
3. absorption type self-moving device as claimed in claim 2, is characterized in that, described elastic telescopic part is positioned at described internal vacuum chamber.
4. absorption type self-moving device as claimed in claim 1, is characterized in that, described absorption type self-moving device is glass-cleaning robot, and described functional unit is rag, and described black box is by rag and absorption surface sealing.
5. absorption type self-moving device as claimed in claim 4, is characterized in that, described black box extends to form shirt rim towards the outside of vacuum chamber, and described shirt rim is towards a side and the absorption surface sealing of absorption surface, and a side that deviates from absorption surface is exposed in atmosphere.
6. absorption type self-moving device as claimed in claim 5, is characterized in that, described shirt rim directly attaches sealing with absorption surface, the less flexible material of described shirt rim employing coefficient of friction.
7. absorption type self-moving device as claimed in claim 5, is characterized in that, described shirt rim is by rag and absorption surface sealing.
8. the absorption type self-moving device as described in claim 1-7 any one, it is characterized in that, described black box mainly includes travel(l)ing rest (500), described travel(l)ing rest (500) is made up of flat part (511) and lug boss (512), on lug boss, offer through hole (5121), the projection (101) that described support (100) bottom is convexly equipped with is through this through hole (5121), and securing member (520) is installed on described support (100) spacing black box (500) through described through hole (5121);
Described elastic telescopic part is spring (530), is set in the outside of described projection (101), and the upper/lower terminal of this spring is supported mutually with the upper surface of support (100) bottom and lug boss (512) respectively.
9. absorption type self-moving device as claimed in claim 8, it is characterized in that, on described flat part (511), be also provided with locating slot (513), one end of sealing ring (540) is embedded in described locating slot (513), sealing is supported in the bottom of the other end and support (100), makes the nested outer side seal being connected of support (100) and black box.
10. absorption type self-moving device as claimed in claim 1, is characterized in that, described absorption type self-moving device is wall surface spraying machine people or waxing robot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415697.4U CN203987840U (en) | 2014-07-25 | 2014-07-25 | Absorption type self-moving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415697.4U CN203987840U (en) | 2014-07-25 | 2014-07-25 | Absorption type self-moving device |
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| Publication Number | Publication Date |
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| CN203987840U true CN203987840U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420415697.4U Withdrawn - After Issue CN203987840U (en) | 2014-07-25 | 2014-07-25 | Absorption type self-moving device |
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| CN (1) | CN203987840U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016011985A1 (en) * | 2014-07-25 | 2016-01-28 | 科沃斯机器人有限公司 | Suction self-moving device |
| CN107917875A (en) * | 2016-10-11 | 2018-04-17 | 青岛海尔模具有限公司 | A kind of window wiping robot of surface detection apparatus and the application device |
| CN108143357A (en) * | 2017-12-31 | 2018-06-12 | 苏州金丝鸟机器人科技有限公司 | A kind of robot for cleaning floor |
| CN110063683A (en) * | 2019-05-12 | 2019-07-30 | 孟亚星 | A kind of suction type double-sided glass cleaning mechanism |
-
2014
- 2014-07-25 CN CN201420415697.4U patent/CN203987840U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016011985A1 (en) * | 2014-07-25 | 2016-01-28 | 科沃斯机器人有限公司 | Suction self-moving device |
| CN105361786A (en) * | 2014-07-25 | 2016-03-02 | 科沃斯机器人有限公司 | A suction type self-moving device |
| CN105361786B (en) * | 2014-07-25 | 2019-09-13 | 科沃斯家用机器人有限公司 | Absorption type self-moving device |
| CN107917875A (en) * | 2016-10-11 | 2018-04-17 | 青岛海尔模具有限公司 | A kind of window wiping robot of surface detection apparatus and the application device |
| CN108143357A (en) * | 2017-12-31 | 2018-06-12 | 苏州金丝鸟机器人科技有限公司 | A kind of robot for cleaning floor |
| CN110063683A (en) * | 2019-05-12 | 2019-07-30 | 孟亚星 | A kind of suction type double-sided glass cleaning mechanism |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160905 Address after: Wuzhong District Wuzhong Economic Development Zone Suzhou city Jiangsu province 215104 the River Street Youxiang Road No. 18 building 7 Patentee after: Ecovacs home robot (Suzhou) Co., Ltd. Address before: 215168 Wuzhong District, Jiangsu, Stone Lake Road West, No. 108 Patentee before: Ecovacs Robot Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 215104 No. 18 Youxiang Road, Yuexi Street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: Kovos Home Robot Co., Ltd. Address before: 215104 No. 18 Youxiang Road, Yuexi Street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Patentee before: Ecovacs home robot (Suzhou) Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20190913 |
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| AV01 | Patent right actively abandoned |