CN208502603U - Anti-theft pick-proof double door - Google Patents
Anti-theft pick-proof double door Download PDFInfo
- Publication number
- CN208502603U CN208502603U CN201820981278.5U CN201820981278U CN208502603U CN 208502603 U CN208502603 U CN 208502603U CN 201820981278 U CN201820981278 U CN 201820981278U CN 208502603 U CN208502603 U CN 208502603U
- Authority
- CN
- China
- Prior art keywords
- pick
- protective edge
- proof
- proof steel
- main door
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 150
- 239000010959 steel Substances 0.000 claims abstract description 150
- 230000001681 protective effect Effects 0.000 claims abstract description 95
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Landscapes
- Wing Frames And Configurations (AREA)
Abstract
The utility model relates to anti-theft pick-proof double doors.Existing antitheft double door it is security against picking have the defects that it is certain.The utility model includes main door fan, secondary door leaf and door lock.Main door fan protective edge and secondary door leaf protective edge cross section be it is step-like, reinforcement steel plate is provided in door body.Pick-proof steel band is provided on main door fan protective edge first step, pick-proof steel band and main door fan protective edge datum level form U-lag.Generally L-shaped pick-proof steel is set on the outside of secondary door leaf protective edge, and pick-proof steel bushing and secondary door leaf protective edge enclose metal case.Main door fan protective edge, pick-proof steel band, pick-proof steel bushing, secondary door leaf protective edge, reinforcement steel plate correspond to latch bolt position and are provided with lock tongue manhole appendix, and pick-proof steel bushing corresponds to pick-proof steel band position and is provided with pick-proof steel manhole appendix.Multiple lock tongue manhole appendix combinations, enhance security door safety, pick-proof steel band is located in metal case, pick-proof performance of having competed in the utility model.Door lock and pick-proof steel X-bite in total have very high safety coefficient.
Description
Technical field
The utility model relates to a kind of security doors, and in particular to a kind of anti-theft pick-proof double door.
Background technique
Security door, full name anti-theft safety door have both antitheft and safe performance, can make of different materials.It is antitheft
The use of door, has been significantly greatly increased the safety of property.Security door is furnished with theftproof lock, can resist certain condition within a certain period of time
Lower unnormal unlocking has certain security protection performance and meets the door of corresponding anti-theft security rank.According to " anti-theft safety door is logical
With technical conditions " it provides, qualified security door utilizes ordinary hand tools and the flashlights such as chisel, screwdriver, crowbar in 15 minutes
One 615 square millimeters of opening can not be pried open or be opened on door leaf to the portable power tools such as brill, or flat in keyed end 150
One 38 square millimeters of opening is opened in the semicircle of square millimeter.And the lockset used on security door must be by the Ministry of Public Security
The qualified Special purpose lock for anti-theft door with anti-drilling function of inspection center's detection.Security door can make of different materials, but only
Have and reach standard detection qualification, the door for getting safety precaution product quasi- production card could be known as security door.
Various security doors currently on the market fan the cooperation between door lock and secondary door leaf lockhole by main door and close bolt main door
Fan reaches anti-theft capability, but can only achieve general antitheft requirement.In security door, the place of general most fragile is exactly opening in lock
Direction position is opened, all splices the entirety that is welded with back plate by foreboard by current conventional security door wing, does not all reach
Pick-proof ability or even part Men Qizhong to safety increase single layer or double-deck pick-proof steel plate also can only achieve raising portion
The tamper-resistant safety structure divided, once criminal is opened by violence, with tool the gap between main door fan and secondary door leaf, lock
It is pried open to place, main door fan and secondary door leaf sled deformation, while door bolt, which is pried open violence damage, keeps door lock directly ineffective,
Therefore security door it is security against picking have the defects that it is certain.
Summary of the invention
The purpose of this utility model provides a kind of anti-theft pick-proof double door aiming at the deficiencies in the prior art, have compared with
The antitheft effect of strong pick-proof and safety.
The utility model includes main door fan, secondary door leaf and door lock.
The main door fan includes that main door fan foreboard, main door fan back plate and main door fan protective edge.The main door fan protective edge
Cross section is step-like, including main door fan protective edge datum level and at least two-stage step;Main door fan is provided in the door body of main door fan
Reinforce steel plate.
Pick-proof steel band is provided on main door fan protective edge first step, pick-proof steel band plane and main door fan protective edge datum level are flat
Row, the same length of length and main door the fan protective edge of pick-proof steel band, pick-proof steel band one end and main door fan pass through the first fastening
Screw is fixedly connected, and the other end is hanging, and pick-proof steel band and main door fan protective edge datum level form U-lag;Door lock setting is fanned in main door
Interior, main door fan protective edge datum level corresponds to latch bolt position and is provided with the first lock tongue manhole appendix, and pick-proof steel band corresponds to latch bolt position and is provided with the
Two lock tongue manhole appendixes.
The secondary door leaf includes secondary door leaf foreboard, secondary door leaf back plate and secondary door leaf protective edge.
The cross section of the secondary door leaf protective edge is step-like, including secondary door leaf protective edge datum level and at least two-stage step;
It is provided with secondary door leaf in the door body of secondary door leaf and reinforces steel plate;Secondary door leaf protective edge first step corresponds to latch bolt position and is provided with third lock tongue
Manhole appendix, secondary door leaf reinforcement steel plate correspond to latch bolt position and are provided with the 4th lock tongue manhole appendix.
Generally L-shaped pick-proof steel is set on the outside of secondary door leaf protective edge, the basic phase of length of length and secondary door leaf protective edge
Together;Pick-proof steel bushing is fixedly connected on secondary door leaf protective edge second step by the second fastening screw, and pick-proof steel bushing corresponds to lock tongue position
It sets and is provided with the 5th lock tongue manhole appendix, corresponding pick-proof steel band position is provided with pick-proof steel manhole appendix, plane where the 5th lock tongue manhole appendix
It is vertical with plane where pick-proof steel manhole appendix;Pick-proof steel bushing and secondary door leaf protective edge first step enclose metal case.
The double door is in the closed state, lock tongue sequentially passes through the first lock tongue manhole appendix, the 5th lock tongue manhole appendix,
Two lock tongue manhole appendixes, third lock tongue manhole appendix, the 4th lock tongue manhole appendix, pick-proof steel band protrude into metal case by pick-proof steel manhole appendix
It is interior.Multiple lock tongue manhole appendix combinations, greatly strengthen the safety of security door.Total causes to hand in door lock and pick-proof steel plate
Fork occlusion, whole anti-theft security performance and pick-proof performance reach high coefficient.
Further, it includes that the first main door fan reinforcement steel plate and the second main door fan reinforce steel that main door fan, which reinforces steel plate,
Plate;The first main door fan reinforces the steel plate that steel plate is section zigzag, fans protective edge first step along main door and main door fans protective edge
The back side of second step is arranged, and it is plane steel plate that the second main door fan, which reinforces steel plate, is arranged along the main door fan protective edge datum level back side, the
One main door fan reinforces steel plate to be overlapped with the projection section that the second main door fans reinforcement steel plate corresponding main door fan protective edge first step position.
First fastening screw sequentially passes through pick-proof steel band, main door fan protective edge first step, the first main door fan and reinforces steel plate and the second main door
Fan reinforces steel plate, and pick-proof steel band is fixedly mounted on main door fan.
Further, the cross section of secondary door leaf reinforcement steel plate is step-like, along secondary door leaf protective edge datum level, secondary door leaf
The back side setting of protective edge first step and secondary door leaf protective edge second step, the second fastening screw sequentially pass through pick-proof steel bushing, secondary door
It fans protective edge second step and secondary door leaf reinforces steel plate, pick-proof steel bushing is fixedly mounted on secondary door leaf.
Further, on the secondary door leaf protective edge datum level to be provided with first with secondary door leaf protective edge first step transition position anti-
Steel bushing jack is prized, secondary door leaf reinforces the corresponding first pick-proof steel bushing jack position of steel plate and is provided with the second pick-proof steel bushing jack;Described
One end of pick-proof steel bushing is provided with hold-down hook, and hold-down hook passes through the first pick-proof steel bushing jack and the second pick-proof steel bushing jack is arranged.
Pick-proof steel bushing is more firmly mounted using which.
Further, the pick-proof steel band is comb shape, including multiple plates;Corresponding pick-proof steel manhole appendix be also it is multiple,
Quantity is identical as plate, and position corresponds.
Main door fans, is provided with reinforcement steel plate, pick-proof steel band and pick-proof steel bushing in secondary door leaf and adds in the utility model
Strong steel plate is fixedly connected by fastening screw, is on the one hand strengthened the intensity of door leaf, is on the other hand strengthened pick-proof steel.This is practical
It is novel under door closed state, pick-proof steel band is located in the metal case that pick-proof steel bushing and secondary door leaf enclose, and integrated anti-theft is anti-
Performance enhancement is prized, criminal can not agitate pick-proof steel band and metal case by the way of violence, and it is even more impossible to agitate door lock
Interior Door-lock bolt, whole safety coefficient is high, greatly improves the tamper-resistant safety performance of the double door.
Detailed description of the invention
Fig. 1 is that main door fans cross section structure schematic diagram in the utility model;
Fig. 2 is a kind of structural schematic diagram of pick-proof steel band in Fig. 1;
Fig. 3 is secondary door leaf cross section structure schematic diagram in the utility model;;
Fig. 4 is the utility model overall structure diagram.
Specific embodiment
Anti-theft pick-proof double door, including main door fan 1, secondary door leaf 2 and door lock 3.
As shown in Figure 1, the main door fan 1 includes that main door fan foreboard 11, main door fan back plate 12 and main door fan protective edge.
The cross section of the described main door fan protective edge is step-like, including main door fan protective edge datum level 131 and at least two-stage platform
Rank (main door fans protective edge first step 132 and main door fans protective edge second step 133).Main door fan is provided in the door body of main door fan 1
Reinforce steel plate, wherein the first main door fan reinforces the steel plate that steel plate 14 is section zigzag, fans 132 He of protective edge first step along main door
Main door fans the back side setting of protective edge second step 133, and it is plane steel plate that the second main door fan, which reinforces steel plate 15, fans protective edge base along main door
Quasi- 131 back side of face setting, the first main door fan reinforce the main door corresponding with the second main door fan reinforcement steel plate 15 of steel plate 14 and fan protective edge first
The projection section of 132 position of step is overlapped.Pick-proof steel band 16, pick-proof steel band 16 are provided on main door fan protective edge first step 132
Plane is parallel with main door fan protective edge datum level 131, the same length of length and main door the fan protective edge of pick-proof steel band 16.First
Fastening screw 17 sequentially passes through pick-proof steel band 16, main door fan protective edge first step 132, the first main door fan and reinforces steel plate 14 and second
Main door fan reinforces steel plate 15, and pick-proof steel band 16 is fixedly mounted on main door fan 1, and pick-proof steel band 16 and main door fan protective edge datum level
131 form U-lag.For the setting of door lock 3 in main door fan 1, corresponding 31 position of lock tongue of main door fan protective edge datum level 131 is provided with the first lock
Tonguing portals 134, and corresponding 31 position of lock tongue of pick-proof steel band 16 is provided with the second lock tongue manhole appendix 161.
It is whole that pick-proof steel band 16 can be one, or comb shape, including multiple plates 162 (as shown in Figure 2).
As shown in figure 3, the secondary door leaf 2 includes secondary door leaf foreboard 21, secondary door leaf back plate 22 and secondary door leaf protective edge.
The cross section of the secondary door leaf protective edge is step-like, including secondary door leaf protective edge datum level 231 and at least two-stage platform
Rank (secondary door leaf protective edge first step 232 and secondary door leaf protective edge second step 233).Secondary door leaf is provided in the door body of secondary door leaf 2
Reinforce steel plate 24, secondary door leaf reinforce steel plate 24 cross section be it is step-like, along secondary door leaf protective edge datum level 231, secondary door leaf protective edge
The back side setting of first step 232 and secondary door leaf protective edge second step 233.On secondary door leaf protective edge datum level 231 with secondary door leaf
232 transition position of protective edge first step is provided with the first pick-proof steel bushing jack 234, and secondary door leaf reinforces the corresponding first pick-proof steel bushing of steel plate 24
234 position of jack is provided with the second pick-proof steel bushing jack 241.Corresponding 31 position of lock tongue of secondary door leaf protective edge first step 232 is provided with the
Three lock tongue manhole appendixes 235, secondary door leaf reinforce corresponding 31 position of lock tongue of steel plate 24 and are provided with the 4th lock tongue manhole appendix 242.Generally L shape
Pick-proof steel bushing 25 be arranged on the outside of secondary door leaf protective edge, the same length of length and secondary door leaf protective edge;Pick-proof steel bushing 25
One end is provided with hold-down hook 251, and hold-down hook 251 passes through the first pick-proof steel bushing jack 234 and the second pick-proof steel bushing jack 241 is set
It sets, the other end of pick-proof steel bushing 25 is fixedly connected on secondary door leaf protective edge second step 233, and the second fastening screw 26 sequentially passes through
Pick-proof steel bushing 25, secondary door leaf protective edge second step 233 and secondary door leaf reinforce steel plate 24, and pick-proof steel bushing 25 is fixedly mounted on secondary door
On fan 2.Specific installation method is: hold-down hook 251 being inserted into pick-proof steel bushing jack first, then turns over 25 entirety of pick-proof steel bushing
Turn, hold-down hook 251 is locked in secondary door leaf 2, then fixed with the second fastening screw 26.Pick-proof steel bushing 25 corresponds to lock tongue 31
It sets and is provided with the 5th lock tongue manhole appendix 252, corresponding 16 position of pick-proof steel band of pick-proof steel bushing 25 is provided with pick-proof steel manhole appendix 253, and the 5th
252 place plane of lock tongue manhole appendix is vertical with 253 place plane of pick-proof steel manhole appendix.Pick-proof steel bushing 25 and secondary door leaf protective edge first
Step 232 encloses metal case A.If pick-proof steel band 16 uses comb shape, corresponding pick-proof steel manhole appendix 253 also to be multiple,
Quantity is identical as plate 162, and position corresponds.
The datum level of main door fan protective edge and secondary door leaf protective edge refers to the k level in step.
As shown in figure 4, the security door is in the closed state, lock tongue 31 sequentially passes through the first lock tongue manhole appendix the 134, the 5th lock
Tonguing is portalled the 252, second lock tongue manhole appendix 161, third lock tongue manhole appendix 235, the 4th lock tongue manhole appendix 242, and door is lockked.
Multiple lock tongue manhole appendix combinations, greatly strengthen the safety of security door.And at this point, pick-proof steel band 16 by pick-proof steel manhole appendix into
Enter in metal case A, is criminal by the gap between the tools such as crowbar insertion doorframe and door leaf, can not also agitate pick-proof
Steel band 16 has high pick-proof effect it is even more impossible to agitate lock tongue.Total, which causes to intersect in door lock and pick-proof steel plate, stings
It closes, whole anti-theft security performance and pick-proof performance reach high coefficient, to reach high anti-theft pick-proof effect.
Claims (6)
1. anti-theft pick-proof double door, including main door fan (1), secondary door leaf (2) and door lock (3), it is characterised in that:
The main door fan (1) includes main door fan foreboard (11), main door fan back plate (12) and main door fan protective edge;
The cross section of the described main door fan protective edge is step-like, including main door fan protective edge datum level (131) and at least two-stage step;
It is provided with main door fan in the door body of main door fan (1) and reinforces steel plate;
It is provided with pick-proof steel band (16) on main door fan protective edge first step (132), pick-proof steel band (16) plane and main door fan protective edge
Datum level (131) in parallel, the same length of the length of pick-proof steel band (16) and main door fan protective edge, the one of pick-proof steel band (16)
End is fixedly connected with main door fan (1) by the first fastening screw (17), and the other end is hanging, and pick-proof steel band (16) and main door fan protective edge
Datum level (131) forms U-lag;In main door fan (1), main door fans protective edge datum level (131) corresponding lock tongue for door lock (3) setting
(31) position is provided with the first lock tongue manhole appendix (134), and corresponding lock tongue (31) position of pick-proof steel band (16) is provided with the disengaging of the second lock tongue
Hole (161);
The secondary door leaf (2) includes secondary door leaf foreboard (21), secondary door leaf back plate (22) and secondary door leaf protective edge;
The cross section of the secondary door leaf protective edge is step-like, including secondary door leaf protective edge datum level (231) and at least two-stage step;
It is provided with secondary door leaf in the door body of secondary door leaf (2) and reinforces steel plate (24);Secondary door leaf protective edge first step (232) is corresponding lock tongue (31)
Position is provided with third lock tongue manhole appendix (235), secondary door leaf reinforce steel plate (24) corresponding lock tongue (31) position be provided with the 4th lock tongue into
Portal (242);
Generally L-shaped pick-proof steel bushing (25) is arranged on the outside of secondary door leaf protective edge, the basic phase of length of length and secondary door leaf protective edge
Together;Pick-proof steel bushing (25) is fixedly connected on secondary door leaf protective edge second step (233) by the second fastening screw (26), pick-proof steel
Corresponding lock tongue (31) position of set (25) is provided with the 5th lock tongue manhole appendix (252), and corresponding pick-proof steel band (16) position is provided with pick-proof steel
Manhole appendix (253), plane is vertical with plane where pick-proof steel manhole appendix (253) where the 5th lock tongue manhole appendix (252);Pick-proof steel
Set (25) and secondary door leaf protective edge first step (232) enclose metal case;
The double door is in the closed state, lock tongue (31) sequentially passes through the first lock tongue manhole appendix (134), the disengaging of the 5th lock tongue
Hole (252), the second lock tongue manhole appendix (161), third lock tongue manhole appendix (235), the 4th lock tongue manhole appendix (242), pick-proof steel band
(16) it is protruded into metal case by pick-proof steel manhole appendix.
2. anti-theft pick-proof double door as described in claim 1, it is characterised in that: it includes first that the main door fan, which reinforces steel plate,
Main door fan reinforces steel plate (14) and the second main door fan reinforces steel plate (15);It is section that the first main door fan, which reinforces steel plate (14),
The steel plate of zigzag is arranged, second along the back side of main door fan protective edge first step (132) and main door fan protective edge second step (133)
It is plane steel plate that main door fan, which reinforces steel plate (15), is arranged along main door fan protective edge datum level (131) back side, the first main door fan reinforces steel
Plate (14) fans the projection section overlapping for reinforcing steel plate (15) corresponding main door fan protective edge first step (132) position with the second main door.
3. anti-theft pick-proof double door as claimed in claim 2, it is characterised in that: first fastening screw (17) is successively worn
It crosses pick-proof steel band (16), main door fan protective edge first step (132), the first main door fan and reinforces steel plate (14) and the fan reinforcement of the second main door
Pick-proof steel band (16) is fixedly mounted on main door fan (1) by steel plate (15).
4. anti-theft pick-proof double door as described in claim 1, it is characterised in that: the secondary door leaf reinforces the cross of steel plate (24)
Section be it is step-like, along secondary door leaf protective edge datum level (231), secondary door leaf protective edge first step (232) and pair door leaf protective edge second
The back side of step (233) is arranged, and the second fastening screw (26) sequentially passes through pick-proof steel bushing (25), secondary door leaf protective edge second step
(233) and secondary door leaf reinforces steel plate (24), and pick-proof steel bushing (25) is fixedly mounted on secondary door leaf (2).
5. anti-theft pick-proof double door as described in claim 1, it is characterised in that: the secondary door leaf protective edge datum level (231)
On be provided with the first pick-proof steel bushing jack (234) with secondary door leaf protective edge first step (232) transition position, secondary door leaf reinforces steel plate
(24) corresponding first pick-proof steel bushing jack (234) position is provided with the second pick-proof steel bushing jack (241);The pick-proof steel bushing (25)
One end be provided with hold-down hook (251), it is slotting that hold-down hook (251) passes through the first pick-proof steel bushing jack (234) and the second pick-proof steel bushing
Hole (241) setting.
6. anti-theft pick-proof double door as described in claim 1, it is characterised in that: the pick-proof steel band (16) is comb shape, packet
Include multiple plates (162);Corresponding pick-proof steel manhole appendix (253) is also to be multiple, and quantity is identical as plate (162), and position is one by one
It is corresponding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820981278.5U CN208502603U (en) | 2018-06-25 | 2018-06-25 | Anti-theft pick-proof double door |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820981278.5U CN208502603U (en) | 2018-06-25 | 2018-06-25 | Anti-theft pick-proof double door |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208502603U true CN208502603U (en) | 2019-02-15 |
Family
ID=65286131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820981278.5U Active CN208502603U (en) | 2018-06-25 | 2018-06-25 | Anti-theft pick-proof double door |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208502603U (en) |
-
2018
- 2018-06-25 CN CN201820981278.5U patent/CN208502603U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4345787A (en) | Lock guard | |
US4884424A (en) | Mortise cylinder lock guard | |
CN109555447A (en) | A kind of Intelligent electronic anti-theft door | |
CN107130855B (en) | Embedded electronic anti-theft lock and door with same | |
CN206801384U (en) | A kind of multilayer pick-proof shield lock antitheft door | |
CN108825084A (en) | A kind of anti-theft pick-proof double door | |
CN208502603U (en) | Anti-theft pick-proof double door | |
CN208763574U (en) | Enhance the security door of tamper-resistant function | |
CN108756664A (en) | A kind of antitheft door of enhancing tamper-resistant function | |
CN214615958U (en) | Pick-proof and smash-proof door locking device | |
CN202544626U (en) | Enhanced prying resistant safe | |
CN208347609U (en) | Prized up-proof door | |
CN208040051U (en) | The anti-forcible entry device of mechanical anti-theft lock | |
US1377051A (en) | Strike or keeper for rim-locks | |
CN213039151U (en) | Anti-theft door with anti-prying steel plate | |
CN217354152U (en) | Safety anti-theft door | |
CN108468503A (en) | Prized up-proof door | |
CN102587787A (en) | Enhanced prying-resistant safe and method for using same | |
CN215213155U (en) | Wooden door leaf with pick-proof seam allowance | |
CN220319320U (en) | Antitheft lock catch and antitheft door lock | |
CN212454006U (en) | Inner four-corner pedal door lock for train | |
CN209603666U (en) | A kind of lockset | |
CN212562839U (en) | Hinge glass lock structure | |
CN213359863U (en) | Anti-picking lock anti-theft door with shield | |
CN221503066U (en) | Door opening structure with safety door lock |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20200309 Address after: 321300 north of the first floor, building 3, 1048 Huajie West Avenue, Huajie Town, Yongkang City, Jinhua City, Zhejiang Province Patentee after: Zhejiang Yuxiang anshide Security Technology Co., Ltd Address before: 321300 Zhejiang city in Jinhua Province before Tang Lin Cun Shi Zhu Zhen Tian fan in Yongkang City, No. 21 Patentee before: Lin Jianhua |