CN211081322U - Passive electronic lock cylinder - Google Patents
Passive electronic lock cylinder Download PDFInfo
- Publication number
- CN211081322U CN211081322U CN201921896865.5U CN201921896865U CN211081322U CN 211081322 U CN211081322 U CN 211081322U CN 201921896865 U CN201921896865 U CN 201921896865U CN 211081322 U CN211081322 U CN 211081322U
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- motor
- lock
- blade
- clutch
- lock bolt
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- 244000126211 Hericium coralloides Species 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 5
- 208000006558 Dental Calculus Diseases 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model belongs to the field of lock, in particular to a passive electronic lock core, which is arranged in a lock shell, wherein the end surface of the outward end of the lock core is respectively provided with a key hole and a contact hole, and a contact is arranged in the contact hole; the lock core is respectively provided with a motor clutch bin and a blade storage bin, the motor clutch is accommodated in the motor clutch bin, the motor is installed in the motor clutch bin, the torsional spring is installed in the lock bolt, one end of the clutch pin is connected with an output shaft of the motor, the other end of the clutch pin penetrates through the lock bolt and the torsional spring and is connected with the torsional spring, the motor works after the contact is contacted with a movable contact on the key, and the lock bolt is driven to reciprocate through the clutch pin and the torsional spring; the blades are movably accommodated in the blade storage bin to form a blade group, one end of the comb tooth sheet is connected with the lock bolt and moves along with the lock bolt, and the other end of the comb tooth sheet and each blade realize mechanical code checking. The utility model discloses could unblank after password comparison and mechanical code checking, it is effectual, safe in utilization to prevent to destroy the theftproof.
Description
Technical Field
The utility model belongs to the tool to lock field, specifically speaking are passive electronic lock core.
Background
At present, the existing pure electronic lock core adopts a structure that a single motor or electromagnet drives a lock bolt to realize the unlocking and the locking of the lock. The existing purely electronic lock core is easy to technically crack by picking the lock, and the technical opening resistance is not high.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior electronic lock cylinder, the utility model aims to provide a passive electronic lock cylinder.
The purpose of the utility model is realized through the following technical scheme:
the utility model is arranged in a lock shell, the passive electronic lock core comprises a lock core, a motor clutch, a comb sheet, a blade and a contact, wherein, the end surface of the outward end of the lock core is respectively provided with a key hole and a contact hole, and the contact is arranged in the contact hole; the lock core is respectively provided with a motor clutch bin and a blade storage bin, the motor clutch is accommodated in the motor clutch bin and comprises a motor, a clutch pin, a torsional spring and a lock bolt, the motor is installed in the motor clutch bin, the torsional spring is installed in the lock bolt, one end of the clutch pin is connected with an output shaft of the motor, the other end of the clutch pin penetrates through the lock bolt and the torsional spring and is connected with the torsional spring, the motor works after the contact is contacted with a movable contact on a key, and the lock bolt is driven to reciprocate by the clutch pin and the torsional spring; the blades are movably accommodated in the blade storage bin to form a blade group, one end of the comb tooth sheet is connected with the lock bolt and moves along with the lock bolt, and the other end of the comb tooth sheet and each blade realize mechanical code checking;
wherein: a torsion spring bin is arranged in the lock bolt, a spring foot sliding groove communicated with the torsion spring bin is formed in the lock bolt, the torsion spring is contained in the torsion spring bin, and a spring foot on the torsion spring is inserted into the spring foot sliding groove;
the lock bolt is provided with a locking boss, the inner surface of the lock shell is correspondingly provided with a lock bolt locking notch, the electronic lock cylinder is driven to move by the motor in the locking state, and the locking boss is inserted into the lock bolt locking notch;
a boss is arranged at the other end of the clutch pin and positioned between any two adjacent circles of the torsion spring, and when the motor drives the clutch pin to rotate, the torque force is converted into a push-pull force through the boss so as to drive the lock plunger to move;
the bosses are flaky and symmetrically arranged on two sides of the clutch pin; one end of the lock bolt, which is close to the motor, is provided with a hole for the clutch pin and the boss to pass through, and the other end of the lock bolt, which is far away from the motor, is provided with a round hole for the clutch pin to pass through;
one side of the comb tooth sheet is provided with a lock bolt driving pin connected with a lock bolt, and the other end of the comb tooth sheet is provided with code checking comb teeth for realizing mechanical code checking with each blade;
a groove for a key to pass through is formed in one side of each blade, a tooth pattern boss corresponding to a key tooth pattern and used for password comparison is arranged in the groove, and a tooth pattern notch is formed in the blade on the other side;
the grooves on each blade are aligned with each other in an unlocking state, and the tooth lug bosses in each groove are positioned in the key teeth; the tooth notch on each blade is mutually aligned in an unlocking state, and the comb tooth piece moves through the mutually aligned tooth notch along with the lock bolt to realize mechanical code checking;
blade locking grooves are formed in the inner surface of the lock shell, and any one end of each blade is inserted into the blade locking groove in an locked state;
the motor is installed in the motor clutch bin through the motor base, and a motor base cover for preventing the motor from rotating is buckled and pressed on the motor base.
The utility model discloses an advantage does with positive effect:
1. the utility model discloses could unblank after password comparison and mechanical code checking, it is effectual, safe in utilization to prevent to destroy the theftproof.
2. The utility model discloses have two guarantees of blade and locking boss, only when the blade retract the lock core in, the locking boss shifts out the set bar and locks the notch after, the lock core could rotate and unblank.
3. The utility model discloses a positive and negative rotation of motor drives the set bar back-and-forth movement, if the motor does not have the power supply, the lock core can't realize unblanking.
Drawings
FIG. 1 is an exploded view of the present invention;
fig. 2 is a schematic perspective view of the lock core of the present invention;
fig. 3 is one of the exploded views of the motor clutch of the present invention;
fig. 4 is a second exploded view of the motor clutch of the present invention;
fig. 5 is one of the schematic three-dimensional structures of the motor clutch of the present invention;
fig. 6 is a second schematic perspective view of the motor clutch of the present invention;
fig. 7 is a top view of the motor clutch of the present invention;
fig. 8 is a bottom view of the motor clutch of the present invention;
fig. 9 is a schematic view of the three-dimensional structure of the comb teeth sheet of the present invention;
fig. 10 is a schematic perspective view of the blade of the present invention;
FIG. 11 is a front view of the motor clutch, the comb plate and the blades in a locked state;
FIG. 12 is a right side view of FIG. 11;
fig. 13 is a schematic perspective view of the locking state of the present invention;
FIG. 14 is a front view of the motor clutch, the comb teeth and the blades of the present invention in an unlocked state;
FIG. 15 is a right side view of FIG. 14;
fig. 16 is a schematic view of the three-dimensional structure of the unlocking state of the present invention;
fig. 17 is a schematic perspective view of a key for unlocking according to the present invention;
fig. 18 is a second schematic perspective view of the key for unlocking according to the present invention;
fig. 19 is an exploded view of a first embodiment of the present invention;
FIG. 20 is a perspective view of the upper lock housing of FIG. 19;
FIG. 21 is a top plan view of the upper lock housing of FIG. 19;
fig. 22 is a cross-sectional view of a locked state according to an embodiment of the present invention;
fig. 23 is a sectional view of the structure in an unlocked state according to the embodiment of the present invention;
fig. 24 is an exploded view of a second embodiment of the present invention;
FIG. 25 is a perspective view of the lock housing of FIG. 24;
fig. 26 is a structural sectional view of a second locked state according to the embodiment of the present invention;
fig. 27 is a schematic perspective view of the second embodiment of the present invention in a locked state;
fig. 28 is a structural sectional view of a second unlocked state of the present invention;
fig. 29 is a schematic perspective view of an unlocked state according to a second embodiment of the present invention;
fig. 30 is a schematic perspective view of an unlocked state according to the second embodiment of the present invention;
wherein: 1 is a lock cylinder, 2 is a motor clutch, 201 is a motor base, 202 is a motor, 203 is a motor base cover, 204 is a clutch pin, 205 is a torsion spring, 206 is a lock bolt, 207 is a torsion spring bin, 208 is a spring pin chute, 209 is a boss, 210 is a round hole, 211 is a locking boss, 212 is a comb tooth piece assembling hole, 213 is a spring pin, 3 is a comb tooth piece, 301 is a lock bolt driving pin, 302 is a code checking comb tooth, 4 is a blade, 401 is a tooth notch, 402 is a tooth notch, 403 is a groove, 5 is a main plate, 6 is a contact, 7 is a contact sleeve, 8 is a key, 801 is a key body, 802 is a key head, 803 is a movable contact, 804 is a key tooth, 9 is a switch key button, 10 is a contact hole, 11 is a motor clutch bin, 12 is a blade bin, 13 is an upper lock shell, 1301 is a blade locking slot A, 1302 is a lock bolt locking slot A, 14 is a lower lock shell, 15 is a lock cylinder, 1501 is a mounting hole, 1502 is blade lock slot B, 1503 is lock bolt lock notch B, 16 is lock beam spring, 17 is lock bolt, 18 is lock bolt spring, 19 is pin, 20 is lock shell, 21 is lock head cover, 22 is electronic lock core, and 23 is mainboard installation bin.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 23, the lock case of the present embodiment is divided into an upper lock case 13 and a lower lock case 14, the electronic lock cylinder 22 is installed between the upper lock case 13 and the lower lock case 14, a blade locking groove a1301 and a lock bolt locking notch a1302 are respectively formed in the upper lock case 13, and the two blade locking grooves a1301 are symmetrically arranged.
The electronic lock cylinder 22 of this embodiment includes lock cylinder 1, motor clutch 2, broach piece 3, blade 4, mainboard 5, contact 6 and contact cover 7, wherein key hole 9 and contact hole 10 have been seted up respectively on the terminal surface of lock cylinder 1 one end outwards, motor clutch storehouse 11 has been seted up respectively on the lock cylinder 1, blade storage bin 12 and mainboard installation storehouse 23, motor clutch storehouse 11 is seted up in one side of lock cylinder 1, mainboard installation storehouse 23 is seted up at the opposite side of lock cylinder 1, blade storage bin 12 is located between motor clutch storehouse 11 and mainboard installation storehouse 23. The motor clutch 2 is accommodated in the motor clutch bin 11 and comprises a motor base 201, a motor 202, a motor base cover 203, a clutch pin 204, a torsion spring 205, a lock bolt 206, a boss 209 and a locking boss 211, wherein the motor 202 is fixed in the motor clutch bin 11 through the motor base 201, and the motor base cover 203 is buckled on the motor base 201 to prevent the motor 202 from rotating. The lock bolt 206 is accommodated in the motor clutch chamber 11 in a manner of moving back and forth along the axial direction of the lock cylinder 1, a torsion spring chamber 207 is arranged in the lock bolt 206, the lock bolt 206 is further provided with a spring pin chute 208 communicated with the torsion spring chamber 207, the torsion spring 205 is accommodated in the torsion spring chamber 207, and two spring pins 213 on the torsion spring 205 are inserted in the spring pin chute 208. One end of the clutch pin 204 is sleeved on the output shaft of the motor 202, and the other end is provided with a boss 209; the bosses 209 of the present embodiment are sheet-shaped and symmetrically disposed on two sides of the clutch pin 204, and a hole for the clutch pin 204 and the bosses 209 to pass through is disposed at one end of the lock plunger 206 close to the motor 202, and a circular hole 210 for the clutch pin 204 to pass through is disposed at one end far from the motor 202. The other end of the clutch pin 204 is penetrated by the torsion spring 205 and the latch 206, and the axial center lines of the clutch pin 204, the torsion spring 205 and the latch 206 are collinear; the other end of the clutch pin 204 is connected with the torsion spring 205, that is, two bosses 209 on the other end of the clutch pin 204 are located between any two adjacent turns of the torsion spring 205, and when the motor 202 drives the clutch pin 204 to rotate, the torsion is converted into a push-pull force through the bosses 209, so as to drive the lock plunger 206 to move back and forth. The lock bolt 206 is further provided with a locking boss 211, the shape of the locking boss 211 of the embodiment is matched with the shape of the locking notch a1302 of the lock bolt, the locking boss 211 is arc-shaped and is arranged at a position according to actual requirements, the electronic lock cylinder 22 is driven by the motor 202 to move in the locked state, the locking boss 211 is inserted into the locking notch a1302 of the lock bolt, and the lock cylinder 1 cannot rotate.
The lower surface of the lock bolt 206 is provided with a comb tooth piece assembling hole 212, one side of the comb tooth piece 3 is provided with a lock bolt driving pin 301, and the lock bolt driving pin 301 is inserted into the comb tooth piece assembling hole 212 to realize that the comb tooth piece 3 moves along with the lock bolt 206; the other end of the comb piece 3 is provided with a plurality of (four in this embodiment) code-checking comb teeth 302 which realize mechanical code checking with each blade 4, and the blade 4 is accommodated between two adjacent code-checking comb teeth 302.
The blades 4 are movably accommodated in the blade storage bin 12 to form a blade group, one side of each blade 4 is provided with a groove 403 through which the key 8 passes, a tooth pattern boss 402 corresponding to the key tooth pattern 804 and used for password comparison is arranged in the groove 403, and the blade 4 on the other side is provided with a tooth pattern notch 401. The number of the blades 4 in this embodiment is eight, and two blades are contained in one group between two adjacent code-checking comb teeth 302; the blades 4 of the present embodiment are divided into three types, which are distinguished according to the positions of the tooth flower bosses 402 in the grooves 403, and after the blades 4 are combined together, the position of each tooth flower boss 402 determines the unlocking password, and the unlocking can be performed only after the corresponding key tooth flower 804 compares the passwords correctly. The grooves 403 on each blade 4 are aligned with each other in the unlocked state, and the bit bosses 402 in each groove 403 are located in the key bits 804; the tartar notch 401 on each blade 4 aligns each other at the state of unblanking, and the broach piece 3 removes the in-process along with the set bar 206, and the code-checking broach 302 all realizes machinery code-checking through the tartar notch 401 that aligns each other. Any one end of each blade 4 protrudes from the key cylinder 1 in the locked state, and is inserted into the blade locking groove a 1301.
The contact 6 is arranged in the contact sleeve 7 and is arranged in a contact hole 10 arranged on the end surface of the lock cylinder 1 together with the contact sleeve 7.
The mainboard 5 is installed in the mainboard installation bin 23, the positive contact point 6 of the input part of the mainboard 5, the negative pole is connected with the core body of the lock cylinder 2, the output part of the mainboard 5 is connected with the motor 202 and used for controlling the positive/negative rotation of the motor 202, and the power cord of the motor is connected with the input part of the mainboard 5. The motherboard 5 is provided with a processor, a power supply end of the processor is used as an input part, and an I/O end of the processor is used as an output part.
The key 8 comprises a key body 801, a key head 802 and a movable contact 803, wherein a control circuit board is arranged in the key body 801, the positive pole of the control circuit board is connected with the movable contact 803, the negative pole of the control circuit board is connected with the key head 802, and a key bit 804 is arranged on the key head 802. The key 8 of the present embodiment is conventional and will not be described herein.
The working principle of the embodiment is as follows:
locking state: one end of the blade 4 moves to the outside of the lock core 1 and is inserted into a blade locking groove A1301 arranged on the upper lock shell 13; meanwhile, the locking boss 211 of the bolt 206 is located in a locking notch A1302 of the bolt formed in the upper lock case 13. At this time, the key cylinder 1 cannot rotate relative to the lock case. The code-checking comb teeth 302 on the comb tooth sheet 3 and the tooth pattern notches 401 on the blades 4 are in a staggered state, and the lock bolts 206 cannot move.
Unlocking process: when the lock is unlocked, a matched key 8 is inserted from a key hole 9 on the end surface of the lock cylinder 1, the negative pole of the key body is contacted with the core body of the lock cylinder 1, the positive pole of a movable contact 803 on the key 8 is contacted with a contact 6 on the lock cylinder 1, and the electronic part of the key 8 supplies power to a main board 5 and a motor 202 in the lock cylinder 1. Meanwhile, in the process of inserting the key 8 into the key hole 9, the key teeth 804 on the key 8 are compared with the codes of the blades 4 in the lock cylinder 1, that is, the teeth bosses 402 on the blades 4 are all pushed in the key teeth 804 in the process of inserting the key 8, the blades 4 are retracted into the lock cylinder 1 until the blades 4 are aligned with each other, the grooves 403 on the blades 4 are also aligned with each other, the key 8 can be inserted, and the code comparison is correct. When the password comparison is correct, the motor 202 in the motor clutch 2 drives the clutch pin 204 to rotate, the boss 209 and the torsion spring 205 are used for driving the lock plunger 206 to move, and then the lock plunger 206 drives the comb teeth sheet 3 to move, so that the mechanical password verification is carried out on the blades 4; that is, the code-checking comb teeth 302 on the comb-tooth sheet 3 are aligned with the position of the tooth pattern notch 401 on the blade 4, when the code of the key tooth 804 on the key 8 is correct with the code of the blade 4, the mechanical code-checking comb teeth 302 can pass through correctly, namely, the code-checking comb teeth 302 pass through the tooth pattern notch 401, the lock bolt 206 can completely move to unlock at the moment, and the lock core 1 is rotated to unlock.
When the lock is locked, the lock cylinder 1 is rotated to the locking position, the switch key 805 on the key 8 is pressed, the motor 202 rotates, the lock plunger 206 moves into a locking notch A1302 of the lock cylinder of the lock shell, the key 8 is pulled out, the blade 4 protrudes out of the lock cylinder 1 and is clamped in a blade locking groove A1301, the positions of the code checking comb teeth 302 on the comb teeth piece 3 and the tooth flower notch 401 on the blade 4 are in a crossed and staggered state, and the lock plunger 206 cannot move.
Example two
As shown in fig. 1 to 18 and fig. 24 to 30, the present embodiment is different from the first embodiment in that: the lock case of the present embodiment is a lock case 20 of a padlock, which is a prior art padlock and includes a shackle 15, a shackle spring 16, a locking tongue 17, a locking tongue spring 18, a pin 19, a lock case 20, and a lock head cover 21. The lock case 20 is provided with a plug mounting hole 1501, and the plug mounting hole 1501 is provided therein with a blade locking groove B1502 and a plug locking notch B1503, respectively. The rest is the same as the first embodiment.
Claims (10)
1. The utility model provides a passive electron lock core, installs in the lock shell which characterized in that: the passive electronic lock cylinder comprises a lock cylinder (1), a motor clutch (2), a comb tooth sheet (3), blades (4) and contacts (6), wherein a key hole (9) and a contact hole (10) are respectively formed in the end face of the outward end of the lock cylinder (1), and the contacts (6) are installed in the contact hole (10); the motor clutch bin (11) and the blade storage bin (12) are respectively arranged on the lock cylinder (1), the motor clutch (2) is contained in the motor clutch bin (11) and comprises a motor (202), a clutch pin (204), a torsion spring (205) and a lock bolt (206), the motor (202) is installed in the motor clutch bin (11), the torsion spring (205) is installed in the lock bolt (206), one end of the clutch pin (204) is connected with an output shaft of the motor (202), the other end of the clutch pin penetrates through the lock bolt (206) and the torsion spring (205) and is connected with the torsion spring (205), the motor (202) works after the contact (6) is in contact with a movable contact (803) on the key (8), and the lock bolt (206) is driven to move back and forth by the clutch pin (204) and the torsion spring (205); the blades (4) are movably accommodated in the blade storage bin (12) to form a blade group, one end of the comb tooth sheet (3) is connected with the lock bolt (206) and moves along with the lock bolt (206), and the other end of the comb tooth sheet (3) and each blade (4) realize mechanical code verification.
2. The passive electronic lock cylinder of claim 1, wherein: a torsion spring bin (207) is arranged in the lock bolt (206), a spring foot sliding groove (208) communicated with the torsion spring bin (207) is formed in the lock bolt (206), the torsion spring (205) is contained in the torsion spring bin (207), and a spring foot (213) on the torsion spring (205) is inserted into the spring foot sliding groove (208).
3. The passive electronic lock cylinder of claim 1, wherein: the electronic lock is characterized in that a locking boss (211) is arranged on the lock bolt (206), a lock bolt locking notch is correspondingly formed in the inner surface of the lock shell, the electronic lock cylinder is driven to move by the motor (202) in the locking state, and the locking boss (211) is inserted into the lock bolt locking notch.
4. The passive electronic lock cylinder of claim 1, wherein: and a boss (209) is arranged at the other end of the clutch pin (204), the boss (209) is positioned between any two adjacent circles of the torsion spring (205), and in the process that the motor (202) drives the clutch pin (204) to rotate, the boss (209) converts the torsion force into a push-pull force so as to drive the lock bolt (206) to move.
5. The passive electronic lock cylinder of claim 4, wherein: the bosses (209) are sheet-shaped and symmetrically arranged on two sides of the clutch pin (204); one end of the lock bolt (206) close to the motor (202) is provided with a hole for the clutch pin (204) and the boss (209) to pass through, and one end far away from the motor (202) is provided with a round hole (210) for the clutch pin (204) to pass through.
6. The passive electronic lock cylinder of claim 1, wherein: one side of the comb tooth sheet (3) is provided with a lock bolt driving pin (301) connected with the lock bolt (206), and the other end of the comb tooth sheet is provided with a code checking comb tooth (302) which realizes mechanical code checking with each blade (4).
7. The passive electronic lock cylinder of claim 1, wherein: one side of the blade (4) is provided with a groove (403) for a key (8) to pass through, a tooth pattern boss (402) corresponding to the key tooth pattern (804) and used for code comparison is arranged in the groove (403), and the blade (4) on the other side is provided with a tooth pattern notch (401).
8. The passive electronic lock cylinder of claim 7, wherein: the grooves (403) on each blade (4) are aligned with each other in the unlocking state, and the tooth lug bosses (402) in each groove (403) are all positioned in the key teeth (804); the tooth flower notches (401) on the blades (4) are mutually aligned in an unlocking state, and the comb teeth piece (3) moves through the tooth flower notches (401) which are mutually aligned along with the lock bolt (206), so that mechanical code checking is realized.
9. The passive electronic lock cylinder of claim 1, wherein: blade locking grooves are formed in the inner surface of the lock shell, and any end of each blade (4) is inserted into the blade locking grooves in an locked state.
10. The passive electronic lock cylinder of claim 1, wherein: the motor (202) is installed in the motor clutch bin (11) through the motor base (201), and a motor base cover (203) for preventing the motor (202) from rotating is buckled and pressed on the motor base (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921896865.5U CN211081322U (en) | 2019-11-05 | 2019-11-05 | Passive electronic lock cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921896865.5U CN211081322U (en) | 2019-11-05 | 2019-11-05 | Passive electronic lock cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211081322U true CN211081322U (en) | 2020-07-24 |
Family
ID=71645322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921896865.5U Withdrawn - After Issue CN211081322U (en) | 2019-11-05 | 2019-11-05 | Passive electronic lock cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211081322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670962A (en) * | 2019-11-05 | 2020-01-10 | 重庆神马锁业有限公司 | Passive electronic lock core |
-
2019
- 2019-11-05 CN CN201921896865.5U patent/CN211081322U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670962A (en) * | 2019-11-05 | 2020-01-10 | 重庆神马锁业有限公司 | Passive electronic lock core |
| CN110670962B (en) * | 2019-11-05 | 2024-04-30 | 重庆神马锁业有限公司 | Passive electronic lock core |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200724 Effective date of abandoning: 20240430 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200724 Effective date of abandoning: 20240430 |