CN201582248U - Mechanical self-locking actuating cylinder structure - Google Patents
Mechanical self-locking actuating cylinder structure Download PDFInfo
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- CN201582248U CN201582248U CN 200920271045 CN200920271045U CN201582248U CN 201582248 U CN201582248 U CN 201582248U CN 200920271045 CN200920271045 CN 200920271045 CN 200920271045 U CN200920271045 U CN 200920271045U CN 201582248 U CN201582248 U CN 201582248U
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- fixing
- pressurized strut
- latching
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Abstract
The utility model relates to a mechanical self-locking actuating cylinder structure, which comprises a tail handle, a fixed locking sleeve, a nut, a cylinder body and a piston, wherein the tail handle is connected with the piston by screw threads and is fastened by the nut, and the tail handle and the piston are jointly arranged in the fixed locking sleeve; the fixed locking sleeve is arranged in the cylinder body and is coaxial with the cylinder body; the right end of the piston is provided with a rabbet; the edge of the tail handle is also provided with a rabbet; the left section and the right section of the fixed locking sleeve are thin tube structures; both ends of the fixed locking sleeve are provided with axial rabbets; 4 to 8 narrow slits are respectively arranged along the axial direction from the heads of the left end and the right end of the fixed locking sleeve; and the fixed locking sleeve and the matched tail handle and the head rabbet of the piston are inclined planes. The utility model has the advantages of being light in weight, reliable and economic. The mechanical self-locking actuating cylinder structure has a self-locking function within a certain range by utilizing the self elastic deformation of the components through reasonable structural design; in the self-locking process of the actuating cylinder, the structure of the actuating cylinder can realize the self-locking function without additional external power, and the economic performance is improved.
Description
Technical field
The utility model relates to mechanical structure field, and a kind of mechanical self-latching pressurized strut structure is provided especially.
Background technique
Pressurized strut structure in the existing machinery industry behind the piston arrives precalculated position of pressurized strut, keeps state of equilibrium for making it, must have exogenous power to make it keep balance, and this just needs to continue consumed energy, and is less economical; And in needs, increase the locking device of a cover electromechanical, to realize locking and release, make complex structure, control complicated to pressurized strut.
For this reason, need the mechanical self-latching pressurized strut structure of a kind of economic and reliable of design, make it can realize mechanical self-latching at special position, and needing no foreign power and control mechanism, simultaneously, this mechanical self-latching pressurized strut must be accomplished lightweight, reliable, economic and be easy to control.
The model utility content
The purpose of this utility model is simple and be easy to control for locking mechanism, and the spy provides a kind of mechanical self-latching pressurized strut structure.
The utility model provides a kind of mechanical self-latching pressurized strut structure, it is characterized in that: described mechanical self-latching pressurized strut structure comprises caudal peduncle 1, fixing and locking sleeve 2, nut 3, cylindrical shell 4, piston 5;
Wherein: caudal peduncle 1 is connected with piston 5 by screw thread and is fastening by nut 3, be installed in the inside of fixing and locking sleeve 2 jointly, fixing and locking sleeve 2 is installed in the inside of cylindrical shell 4, and coaxial with cylindrical shell 4, the right-hand member of piston 5 is provided with seam, and caudal peduncle 1 also is provided with seam at the edge;
The fixing and locking sleeve is the book tube structure for about 2 two sections, the end, two ends is provided with axial seam, begin in axial direction respectively to have 4～8 narrow slits from two ends, left and right sides head, the seam end, also be drilled with the aperture that prevents that stress from concentrating, and fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams.
Described mechanical self-latching pressurized strut structure also comprises O-ring seal 1, O-ring seal 27, O-ring seal 38;
Wherein: O-ring seal 1 is installed between cylindrical shell 4 and the piston 5, and O-ring seal 27 is installed between fixing and locking sleeve 2 and the cylindrical shell 4, and O-ring seal 38 is installed between fixing and locking sleeve 2 and the piston 5.
Described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell 4, piston 5, fixing and locking sleeve 2, two chambeies about cylindrical shell 4 inside are divided into.
Pressurized strut piston 5 generally is subjected to axial active force, and because fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams, like this, on contacted inclined-plane, produce an axial thrust load and radial component, axial thrust load makes pressurized strut piston 5 continue to seesaw, and under the radial component effect, fixing and locking sleeve head port diameter can resiliently deformable take place and become big, cancel rear port when radial component and can get back to original size again, realize mechanical interlocking.Realize that the size of the radial component of pressurized strut locking and release depends primarily on the size of " seam " corresponding angle on angle [alpha], β, γ, θ and caudal peduncle 1 and the piston 5, angular range is between 10 °～80 °, if do not need release after the locking, then β and θ angle are 90 °.
During work, pressurized strut cylindrical shell 4 left side pipe nipples advance high pressure oil or high pressure air, the right side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston moves right, when the seam right tilted surface at caudal peduncle place withstands on the internal surface of fixing and locking seal sleeve 2 left ends, the radial component of its active force, make the change of fixing and locking seal sleeve 2 left end ports allow the seam of caudal peduncle 1 enter the stop portion of sleeve left end greatly, sleeve left end radial dimension is got back to original size under the effect of elastic force, match with the left tilted surface of caudal peduncle 1 seam, as shown in Figure 3, lock piston 5, do not allow and stretch out arbitrarily, this moment, the right-hand member of nut 3 withstood on the middle part end face of sleeve, and piston can not be regained to the right again, thereby guarantee the stable of piston, realize the mechanical self-latching of pressurized strut.
When pressurized strut cylindrical shell 4 right side pipe nipples advance high pressure oil or high pressure air, the left side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston is moved to the left, when the seam left tilted surface of piston withstands on the internal surface of 2 right-hand members of fixing and locking stuffing box gland, the radial component of its active force, make the change of fixing and locking seal sleeve 2 right-hand member ports allow the seam of piston enter the stop portion of sleeve right-hand member greatly, sleeve right-hand member radial dimension is got back to original size under the effect of elastic force, match with the right tilted surface of piston seam, as shown in Figure 4, lock piston 5 does not allow and stretches out arbitrarily, this moment, the left end of piston crown withstood on the right side of sleeve, piston 5 can not be regained left again, thereby guarantee the stable of piston 5, realize the mechanical self-latching of pressurized strut.
Advantage of the present utility model:
Lightweight, reliable, economic.It utilizes the resiliently deformable of member itself, by reasonable structural design, makes it have auto-lock function within the specific limits; In the process of pressurized strut self-locking, no longer need extra exogenous power, itself structure can realize auto-lock function, Economy improves; The release of pressurized strut can realize release by certain exogenous power, and control system that need not be complicated makes control simple, and reliability improves.
Description of drawings
Below in conjunction with drawings and the embodiments the utility model is described in further detail:
Fig. 1 is a mechanical self-latching pressurized strut structural representation;
Fig. 2 is a fixing and locking tube-in-tube structure schematic representation;
Locking state when Fig. 3 regains for piston;
Locking state when Fig. 4 stretches out for piston;
Fig. 5 is the local enlarged diagram of I part among Fig. 2;
Fig. 6 is the local enlarged diagram of II part among Fig. 2.
Embodiment
Present embodiment provides a kind of mechanical self-latching pressurized strut structure, it is characterized in that: described mechanical self-latching pressurized strut structure comprises caudal peduncle 1, fixing and locking sleeve 2, nut 3, cylindrical shell 4, piston 5;
Wherein: caudal peduncle 1 is connected with piston 5 by screw thread and is fastening by nut 3, be installed in the inside of fixing and locking sleeve 2 jointly, fixing and locking sleeve 2 is installed in the inside of cylindrical shell 4, and coaxial with cylindrical shell 4, the right-hand member of piston 5 is provided with seam, and caudal peduncle 1 also is provided with seam at the edge;
The fixing and locking sleeve is the book tube structure for about 2 two sections, the end, two ends is provided with axial seam, begin in axial direction respectively to have 4 narrow slits from two ends, left and right sides head, the seam end, also be drilled with the aperture that prevents that stress from concentrating, and fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams.
Described mechanical self-latching pressurized strut structure also comprises O-ring seal 1, O-ring seal 27, O-ring seal 38;
Wherein: O-ring seal 1 is installed between cylindrical shell 4 and the piston 5, and O-ring seal 27 is installed between fixing and locking sleeve 2 and the cylindrical shell 4, and O-ring seal 38 is installed between fixing and locking sleeve 2 and the piston 5.
Described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell 4, piston 5, fixing and locking sleeve 2, two chambeies about cylindrical shell 4 inside are divided into.
Pressurized strut piston 5 generally is subjected to axial active force, and because fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams, like this, on contacted inclined-plane, produce an axial thrust load and radial component, axial thrust load makes pressurized strut piston 5 continue to seesaw, and under the radial component effect, fixing and locking sleeve head port diameter can resiliently deformable take place and become big, cancel rear port when radial component and can get back to original size again, realize mechanical interlocking.Realize that the size of the radial component of pressurized strut locking and release depends primarily on the size of " seam " corresponding angle on angle [alpha], β, γ, θ and caudal peduncle 1 and the piston 5, angle is 10 °.
During work, pressurized strut cylindrical shell 4 left side pipe nipples advance high pressure oil or high pressure air, the right side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston moves right, when the seam right tilted surface at caudal peduncle place withstands on the internal surface of fixing and locking seal sleeve 2 left ends, the radial component of its active force, make the change of fixing and locking seal sleeve 2 left end ports allow the seam of caudal peduncle 1 enter the stop portion of sleeve left end greatly, sleeve left end radial dimension is got back to original size under the effect of elastic force, match with the left tilted surface of caudal peduncle 1 seam, as shown in Figure 3, lock piston 5, do not allow and stretch out arbitrarily, this moment, the right-hand member of nut 3 withstood on the middle part end face of sleeve, and piston can not be regained to the right again, thereby guarantee the stable of piston, realize the mechanical self-latching of pressurized strut.
When pressurized strut cylindrical shell 4 right side pipe nipples advance high pressure oil or high pressure air, the left side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston is moved to the left, when the seam left tilted surface of piston withstands on the internal surface of 2 right-hand members of fixing and locking stuffing box gland, the radial component of its active force, make the change of fixing and locking seal sleeve 2 right-hand member ports allow the seam of piston enter the stop portion of sleeve right-hand member greatly, sleeve right-hand member radial dimension is got back to original size under the effect of elastic force, match with the right tilted surface of piston seam, as shown in Figure 4, lock piston 5 does not allow and stretches out arbitrarily, this moment, the left end of piston crown withstood on the right side of sleeve, piston 5 can not be regained left again, thereby guarantee the stable of piston 5, realize the mechanical self-latching of pressurized strut.
Embodiment 2
Present embodiment provides a kind of mechanical self-latching pressurized strut structure, it is characterized in that: described mechanical self-latching pressurized strut structure comprises caudal peduncle 1, fixing and locking sleeve 2, nut 3, cylindrical shell 4, piston 5;
Wherein: caudal peduncle 1 is connected with piston 5 by screw thread and is fastening by nut 3, be installed in the inside of fixing and locking sleeve 2 jointly, fixing and locking sleeve 2 is installed in the inside of cylindrical shell 4, and coaxial with cylindrical shell 4, the right-hand member of piston 5 is provided with seam, and caudal peduncle 1 also is provided with seam at the edge;
The fixing and locking sleeve is the book tube structure for about 2 two sections, the end, two ends is provided with axial seam, begin in axial direction respectively to have 6 narrow slits from two ends, left and right sides head, the seam end, also be drilled with the aperture that prevents that stress from concentrating, and fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams.
Described mechanical self-latching pressurized strut structure also comprises O-ring seal 1, O-ring seal 27, O-ring seal 38;
Wherein: O-ring seal 1 is installed between cylindrical shell 4 and the piston 5, and O-ring seal 27 is installed between fixing and locking sleeve 2 and the cylindrical shell 4, and O-ring seal 38 is installed between fixing and locking sleeve 2 and the piston 5.
Described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell 4, piston 5, fixing and locking sleeve 2, two chambeies about cylindrical shell 4 inside are divided into.
Pressurized strut piston 5 generally is subjected to axial active force, and because fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams, like this, on contacted inclined-plane, produce an axial thrust load and radial component, axial thrust load makes pressurized strut piston 5 continue to seesaw, and under the radial component effect, fixing and locking sleeve head port diameter can resiliently deformable take place and become big, cancel rear port when radial component and can get back to original size again, realize mechanical interlocking.Realize that the size of the radial component of pressurized strut locking and release depends primarily on the size of " seam " corresponding angle on angle [alpha], β, γ, θ and caudal peduncle 1 and the piston 5, angle is 80 °.
During work, pressurized strut cylindrical shell 4 left side pipe nipples advance high pressure oil or high pressure air, the right side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston moves right, when the seam right tilted surface at caudal peduncle place withstands on the internal surface of fixing and locking seal sleeve 2 left ends, the radial component of its active force, make the change of fixing and locking seal sleeve 2 left end ports allow the seam of caudal peduncle 1 enter the stop portion of sleeve left end greatly, sleeve left end radial dimension is got back to original size under the effect of elastic force, match with the left tilted surface of caudal peduncle 1 seam, as shown in Figure 3, lock piston 5, do not allow and stretch out arbitrarily, this moment, the right-hand member of nut 3 withstood on the middle part end face of sleeve, and piston can not be regained to the right again, thereby guarantee the stable of piston, realize the mechanical self-latching of pressurized strut.
When pressurized strut cylindrical shell 4 right side pipe nipples advance high pressure oil or high pressure air, the left side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston is moved to the left, when the seam left tilted surface of piston withstands on the internal surface of 2 right-hand members of fixing and locking stuffing box gland, the radial component of its active force, make the change of fixing and locking seal sleeve 2 right-hand member ports allow the seam of piston enter the stop portion of sleeve right-hand member greatly, sleeve right-hand member radial dimension is got back to original size under the effect of elastic force, match with the right tilted surface of piston seam, as shown in Figure 4, lock piston 5 does not allow and stretches out arbitrarily, this moment, the left end of piston crown withstood on the right side of sleeve, piston 5 can not be regained left again, thereby guarantee the stable of piston 5, realize the mechanical self-latching of pressurized strut.
Present embodiment provides a kind of mechanical self-latching pressurized strut structure, it is characterized in that: described mechanical self-latching pressurized strut structure comprises caudal peduncle 1, fixing and locking sleeve 2, nut 3, cylindrical shell 4, piston 5;
Wherein: caudal peduncle 1 is connected with piston 5 by screw thread and is fastening by nut 3, be installed in the inside of fixing and locking sleeve 2 jointly, fixing and locking sleeve 2 is installed in the inside of cylindrical shell 4, and coaxial with cylindrical shell 4, the right-hand member of piston 5 is provided with seam, and caudal peduncle 1 also is provided with seam at the edge;
The fixing and locking sleeve is the book tube structure for about 2 two sections, the end, two ends is provided with axial seam, begin in axial direction respectively to have 8 narrow slits from two ends, left and right sides head, the seam end, also be drilled with the aperture that prevents that stress from concentrating, and fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams.
Described mechanical self-latching pressurized strut structure also comprises O-ring seal 1, O-ring seal 27, O-ring seal 38;
Wherein: O-ring seal 1 is installed between cylindrical shell 4 and the piston 5, and O-ring seal 27 is installed between fixing and locking sleeve 2 and the cylindrical shell 4, and O-ring seal 38 is installed between fixing and locking sleeve 2 and the piston 5.
Described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell 4, piston 5, fixing and locking sleeve 2, two chambeies about cylindrical shell 4 inside are divided into.
Pressurized strut piston 5 generally is subjected to axial active force, and because fixing and locking sleeve 2 is the inclined-plane with caudal peduncle 1 that matches and piston 5 head seams, like this, on contacted inclined-plane, produce an axial thrust load and radial component, axial thrust load makes pressurized strut piston 5 continue to seesaw, and under the radial component effect, fixing and locking sleeve head port diameter can resiliently deformable take place and become big, cancel rear port when radial component and can get back to original size again, realize mechanical interlocking.Realize that the size of the radial component of pressurized strut locking and release depends primarily on the size of " seam " corresponding angle on angle [alpha], β, γ, θ and caudal peduncle 1 and the piston 5, angle is 45 °.
During work, pressurized strut cylindrical shell 4 left side pipe nipples advance high pressure oil or high pressure air, the right side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston moves right, when the seam right tilted surface at caudal peduncle place withstands on the internal surface of fixing and locking seal sleeve 2 left ends, the radial component of its active force, make the change of fixing and locking seal sleeve 2 left end ports allow the seam of caudal peduncle 1 enter the stop portion of sleeve left end greatly, sleeve left end radial dimension is got back to original size under the effect of elastic force, match with the left tilted surface of caudal peduncle 1 seam, as shown in Figure 3, lock piston 5, do not allow and stretch out arbitrarily, this moment, the right-hand member of nut 3 withstood on the middle part end face of sleeve, and piston can not be regained to the right again, thereby guarantee the stable of piston, realize the mechanical self-latching of pressurized strut.
When pressurized strut cylindrical shell 4 right side pipe nipples advance high pressure oil or high pressure air, the left side pipe nipple connects low pressure oil sources or source of the gas, under the effect of piston 5 pressure at two ends differences, piston is moved to the left, when the seam left tilted surface of piston withstands on the internal surface of 2 right-hand members of fixing and locking stuffing box gland, the radial component of its active force, make the change of fixing and locking seal sleeve 2 right-hand member ports allow the seam of piston enter the stop portion of sleeve right-hand member greatly, sleeve right-hand member radial dimension is got back to original size under the effect of elastic force, match with the right tilted surface of piston seam, as shown in Figure 4, lock piston 5 does not allow and stretches out arbitrarily, this moment, the left end of piston crown withstood on the right side of sleeve, piston 5 can not be regained left again, thereby guarantee the stable of piston 5, realize the mechanical self-latching of pressurized strut.
Claims (5)
1. mechanical self-latching pressurized strut structure, it is characterized in that: described mechanical self-latching pressurized strut structure comprises caudal peduncle (1), fixing and locking sleeve (2), nut (3), cylindrical shell (4), piston (5);
Wherein: caudal peduncle (1) is connected with piston (5) by screw thread and is fastening by nut (3), be installed in the inside of fixing and locking sleeve (2) jointly, fixing and locking sleeve (2) is installed in the inside of cylindrical shell (4), and it is coaxial with cylindrical shell (4), the right-hand member of piston (5) is provided with seam, and caudal peduncle (1) also is provided with seam at the edge;
Two sections is the book tube structure about fixing and locking sleeve (2), the end, two ends is provided with axial seam, begin in axial direction respectively to have 4～8 narrow slits from two ends, left and right sides head, fixing and locking sleeve (2) is the inclined-plane with caudal peduncle that matches (1) and piston (5) head seam.
2. according to the described mechanical self-latching pressurized strut of claim 1 structure, it is characterized in that: described mechanical self-latching pressurized strut structure also comprises O-ring seal one (6), O-ring seal two (7), O-ring seal three (8);
Wherein: O-ring seal one (6) is installed between cylindrical shell (4) and the piston (5), and O-ring seal two (7) is installed between fixing and locking sleeve (2) and the cylindrical shell (4), and O-ring seal three (8) is installed between fixing and locking sleeve (2) and the piston (5).
3. according to the described mechanical self-latching pressurized strut of claim 1 structure, it is characterized in that: described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell (4), piston (5), fixing and locking sleeve (2), two chambeies about cylindrical shell (4) inside is divided into.
4. according to the described mechanical self-latching pressurized strut of claim 2 structure, it is characterized in that: described mechanical self-latching pressurized strut structure under the acting in conjunction of cylindrical shell (4), piston (5), fixing and locking sleeve (2), two chambeies about cylindrical shell (4) inside is divided into.
5. according to the described mechanical self-latching pressurized strut of claim 1 structure, it is characterized in that: in the described mechanical self-latching pressurized strut structure, two sections is the book tube structure about fixing and locking sleeve (2), the end, two ends is provided with axial seam, begin in axial direction respectively to have 4～8 narrow slits from two ends, left and right sides head, its seam end, also be drilled with the aperture that prevents that stress from concentrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920271045 CN201582248U (en) | 2009-11-26 | 2009-11-26 | Mechanical self-locking actuating cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920271045 CN201582248U (en) | 2009-11-26 | 2009-11-26 | Mechanical self-locking actuating cylinder structure |
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| CN201582248U true CN201582248U (en) | 2010-09-15 |
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| CN 200920271045 Expired - Fee Related CN201582248U (en) | 2009-11-26 | 2009-11-26 | Mechanical self-locking actuating cylinder structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080678A (en) * | 2009-11-26 | 2011-06-01 | 中国航空工业集团公司沈阳发动机设计研究所 | Mechanical self-locking actuating cylinder structure |
| CN103899593A (en) * | 2014-03-31 | 2014-07-02 | 长治清华机械厂 | Automatic multi-level elastic ring locking hydraulic cylinder |
| CN106275392A (en) * | 2016-09-08 | 2017-01-04 | 南京航空航天大学 | A kind of multistage pressurized strut locking device |
| CN106347639A (en) * | 2016-09-08 | 2017-01-25 | 南京航空航天大学 | Electric multistage actuating cylinder retracting and releasing locking device |
| CN110094385A (en) * | 2019-05-24 | 2019-08-06 | 河南百思特机械设备制造有限公司 | A kind of Novel environmental-sanitation plant machinery locking hydraulic cylinder |
-
2009
- 2009-11-26 CN CN 200920271045 patent/CN201582248U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080678A (en) * | 2009-11-26 | 2011-06-01 | 中国航空工业集团公司沈阳发动机设计研究所 | Mechanical self-locking actuating cylinder structure |
| CN103899593A (en) * | 2014-03-31 | 2014-07-02 | 长治清华机械厂 | Automatic multi-level elastic ring locking hydraulic cylinder |
| CN106275392A (en) * | 2016-09-08 | 2017-01-04 | 南京航空航天大学 | A kind of multistage pressurized strut locking device |
| CN106347639A (en) * | 2016-09-08 | 2017-01-25 | 南京航空航天大学 | Electric multistage actuating cylinder retracting and releasing locking device |
| CN106347639B (en) * | 2016-09-08 | 2019-07-19 | 南京航空航天大学 | A kind of electric multi-stage pressurized strut folding and unfolding locking device |
| CN110094385A (en) * | 2019-05-24 | 2019-08-06 | 河南百思特机械设备制造有限公司 | A kind of Novel environmental-sanitation plant machinery locking hydraulic cylinder |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20141126 |
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| EXPY | Termination of patent right or utility model |