CN114197416A

CN114197416A - Water surface garbage collector

Info

Publication number: CN114197416A
Application number: CN202111457523.5A
Authority: CN
Inventors: 王路通; 王德斌
Original assignee: Cangzhou Xinyu Fastener Co ltd
Current assignee: Cangzhou Xinyu Fastener Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-03-18
Anticipated expiration: 2041-12-01
Also published as: CN114197416B

Abstract

The invention discloses a water surface garbage collector which comprises a cutting device, a screen drum device, a collector shell, a horizontal moving propeller, a vertical moving propeller, a cross groove rotary table, a waterproof motor and a protective cover, wherein the collector shell is in a deformed cylindrical shape, one group of two cutting devices are respectively and fixedly arranged on the outer side of the upper end of the collector shell, the cross groove of the cross groove rotary table is upward and is rotatably arranged at the bottom end in the collector shell, and the waterproof motor is fixedly arranged on the collector shell. According to the water surface garbage collector, the screen drum device is inserted into the collector shell, the upper end of the screen drum device is fixedly arranged on the collector shell, the lower end of the screen drum device is inserted into the cross groove of the cross groove rotary table, the shield is fixedly arranged on the collector shell, covers the motor, automatically moves in water, collects water surface garbage, can cut off and collect long plant garbage, and solves the problem that the garbage is difficult to salvage on the water surface.

Description

Water surface garbage collector

Technical Field

The invention relates to the technical field of garbage cans, in particular to a water surface garbage collector.

Background

The water surface garbage collector is a supporting device for carrying out water surface garbage cleaning operation, water surface garbage is just garbage suspended on the water surface as the name suggests, artificial random garbage throwing is caused, for example, plastic bags, plastic bottles and half parts of water are too much bathes, ecology in water is influenced, fishing is needed, and branches and leaves, straws and the like are also available.

The existing water surface garbage collector has certain defects when in use, most of the existing water surface garbage collectors are manually salvaged, time and labor are wasted, and garbage salvage ships are also needed, but are not suitable for being used in small lakes, the size is large and heavy, and the edge dead angles are not thoroughly salvaged, so that a small-size garbage collection device capable of freely walking on the water surface is needed, and the use of people is not facilitated.

Disclosure of Invention

Technical problem to be solved

Aiming at the problems, the invention provides a water surface garbage collector which automatically moves in water by virtue of a cutting device, a screen drum device, a collector shell, a horizontal moving propeller, a vertical moving propeller, a cross groove turntable, a waterproof motor and a shield, collects water surface garbage and can cut and collect long plant garbage.

(II) technical scheme

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a surface of water garbage collector, includes cutting device, a sieve section of thick bamboo device, collector casing, horizontal migration screw, vertical removal screw, cross recess carousel, waterproof motor, guard shield, the collector casing is the deformation tube-shape, two a set of cutting device, fixed mounting are in the upper end outside of collector casing respectively, the cross recess of cross recess carousel up, rotate and install in the inside bottom of collector casing, waterproof motor fixed mounting is on the collector casing, and waterproof motor drive shaft and cross recess carousel axis align, waterproof motor drive shaft and cross recess carousel tip fixed connection, inside sieve section of thick bamboo device inserts the collector casing, upper end fixed mounting is on the collector casing, and the lower extreme inserts in the cross recess of cross recess carousel, guard shield fixed mounting covers the motor on the collector casing.

As a preferred technical scheme of the application, the cutting device comprises a cutting knife, a cutting edge, a bolt, a knife holder, a bolt, a reciprocating knife holder, a sliding sleeve, an electromagnet, a spring, a loop bar and a fixed seat, the cutting knife is fixedly arranged on the reciprocating knife holder through a bolt, the cutting knife comprises a cutting edge and a knife holder, the four sliding sleeves are respectively and fixedly arranged at the positions, close to the four corners, of the reciprocating tool apron, the four loop bars are respectively and fixedly arranged at the positions, close to the four corners, of the fixed seat, corresponding to the sliding sleeve, the sliding sleeve is arranged on the sleeve rod in a sliding way, two electromagnets are arranged in one group, the axes are opposite, three groups are arranged, and the electromagnets are respectively and fixedly arranged on the reciprocating cutter holder and the fixed seat, the number of the springs is four, one end of each spring is fixedly installed on the reciprocating cutter holder, the other end of each spring is fixedly installed on the fixed seat, and the two cutting devices are fixedly installed on the collector shell through bolts.

As an optimal technical scheme of this application, a sieve section of thick bamboo device includes electro-magnet switch, salvage handle, flange, electro-magnet, helical blade, dead slot, toper basket, sieve mesh, power drive, shrouding, export, cross key, plate body, the toper basket is conical shape, evenly distributed sieve mesh around, helical blade fixed mounting sets up the dead slot around the toper basket outside, around the helical blade, the flange rotates and installs at toper basket upper end groove position, and four even fixed mounting respectively in the flange bottom are totally gone up to the electro-magnet, salvage handle fixed mounting is in the flange upper end, electro-magnet switch fixed mounting is at the middle lower extreme of salvage handle, shrouding edge round pin axle rotates and installs in toper basket bottom one side, power drive and shrouding edge round pin axle fixed connection. The shrouding includes cross key and plate body, cross key is fixed in the plate body middle part.

As an optimal technical scheme of this application, the collector casing includes deflector, backup pad, casing, annular, support rib plate, mounting hole, scallop hole, backup pad, the casing is the eight-square tube-shapes, the casing upper end sets up the annular, two a set of welding respectively in the upper end outside corner of casing altogether of backup pad, the deflector is circular-arc welding in a set of backup pad outside, support rib plate four respectively evenly weld in the casing bottom outside altogether, mounting hole and mounting hole set up lateral part and bottom at the support rib plate respectively, backup pad fixed mounting leaves four scallop holes in the casing bottom.

As an optimal technical scheme of this application, the horizontal migration screw includes bottom plate, screw shell, helical blade, power drive, the horizontal migration screw adopt prior art structure can, screw shell fixed mounting is on the bottom plate, helical blade rotates and installs on the screw shell, power drive helical blade rotates, and vertical removal screw and horizontal migration screw are same part.

As a preferable technical scheme of the application, the cross-shaped groove rotary table comprises a cross-shaped groove and a disc, wherein the cross-shaped groove is formed in the middle of the disc, and the cross-shaped groove is matched with the cross-shaped key.

(III) advantageous effects

Compared with the prior art, the invention provides a water surface garbage collector, which has the following beneficial effects: 1. the water surface garbage collector can automatically move on the water surface and can collect water surface garbage at different positions.

2. The screen cylinder is designed to be conical and convenient to install, and the spiral blade with the notch arranged outside the conical barrel is convenient to introduce water flow into the conical barrel.

3. The lower end of the conical barrel is made into a sealing plate which can be opened and closed automatically, so that garbage can be cleaned at a later stage conveniently, the flange at the upper end of the conical barrel is made to rotate relative to the conical barrel, and the rotation of the conical barrel is not influenced when the flange is positioned.

4. The cutting device can automatically cut off garbage such as long branches and straws, not only prevents the garbage from being blocked in the screen drum device, but also saves the space of the screen drum device.

5. The collector shell is provided with the guide plate, so that garbage can be automatically guided, the garbage can enter the cutting device conveniently, the whole water surface garbage collector is simple in structure and convenient to operate, and the using effect is better than that of the traditional mode.

Drawings

Fig. 1 is a schematic view of the overall assembly structure of the present invention.

Fig. 2 is a schematic side view of the overall structure of the present invention.

Fig. 3 and 4 are schematic views of the cutting device of the present invention.

Fig. 5 and 6 are schematic views of the screen drum device of the present invention.

FIG. 7 is a schematic view of a collector housing of the present invention.

Fig. 8 is a schematic view of the horizontal and vertical moving propellers of the present invention.

FIG. 9 is a schematic view of a cross-slot turntable of the present invention.

In the figure: 1. a cutting device; 2. a screen cylinder device; 3. a collector housing; 4. horizontally moving the propeller; 5. vertically moving the propeller; 6. a cross-slot turntable; 7. a waterproof motor; 8. a shield; 101. a cutting knife; 102. a blade; 103. a bolt; 104. a tool apron; 105. a bolt; 106. the tool apron is moved in a reciprocating manner; 107. a sliding sleeve; 108. an electromagnet; 109. a spring; 110. a loop bar; 111. a fixed seat; 201. an electromagnet switch; 202. fishing a handle; 203. a flange; 204. an electromagnet; 205. a helical blade; 206. an empty groove; 207. a conical basket; 208. screening holes; 209. power driving; 210. closing the plate; 211. an outlet; 212. a cross key; 213. a plate body; 301. a guide plate; 302. a support plate; 303. a housing; 304. a ring groove; 305. supporting the rib plate; 306. mounting holes; 307. mounting holes; 308. a sector hole; 309. a support plate; 401. a base plate; 402. a propeller housing; 403. a helical blade; 404. power driving; 601. a cross groove; 602. a disk.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1-9, a water surface garbage collector comprises a cutting device 1, a screen drum device 2, a collector shell 3, a horizontal moving screw 4, a vertical moving screw 5, a cross groove rotary table 6, a waterproof motor 7 and a shield 8, wherein the collector shell 3 is in a shape of 8 deformed cylinder, two cutting devices 1 are fixedly arranged on the outer side of the upper end of the collector shell 3 respectively, the cutting device 1 cuts long garbage such as branches and straws and the like to be convenient to enter the screen drum device 2, not only the garbage is prevented from being clamped in the screen drum device 2, but also the space of the screen drum device 2 is saved, a cross groove of the cross groove rotary table 6 is upward and is rotatably arranged at the bottom end inside the collector shell 3, the waterproof motor 7 is fixedly arranged on the collector shell 3, the driving shaft of the waterproof motor 7 is aligned with the axis of the cross groove rotary table 6, and the driving shaft of the waterproof motor 7 is fixedly connected with the end of the cross groove rotary table 6, inside sieve section of thick bamboo device 2 inserts collector casing 3, upper end fixed mounting is on collector casing 3, the lower extreme inserts in the cross recess of cross recess carousel 6, waterproof motor 7 rotates, it rotates to drive cross recess carousel 6, thereby cross recess carousel 6 drives sieve section of thick bamboo device 2 and rotates, sieve section of thick bamboo device 2 is inside with rivers introduction sieve section of thick bamboo device 2, thereby rubbish is held back to sieve section of thick bamboo device 2, water is discharged away through sieve section of thick bamboo device 2, 8 fixed mounting on collector casing 3 of guard shield cover motor, prevent that the motor from exposing the protection motor.

Further, the cutting device 1 comprises a cutting knife 101, a cutting edge 102, a bolt 103, a knife holder 104, a bolt 105, a reciprocating knife holder 106, a sliding sleeve 107, an electromagnet 108, a spring 109, a loop bar 110 and a fixed seat 111, wherein the cutting knife 101 is fixedly arranged on the reciprocating knife holder 106 through the bolt 103, the cutting knife 101 comprises the cutting edge 102 and the knife holder 104, the sliding sleeve 107 comprises four parts, respectively and fixedly arranged at the position of the reciprocating knife holder 106 close to four corners, the loop bar 110 comprises four parts, respectively and fixedly arranged at the position of the fixed seat 111 close to four corners, corresponding to the sliding sleeve 107, the sliding sleeve 107 is slidably arranged on the loop bar 110, two electromagnets 108 are arranged in one group, the axes are opposite, three groups are arranged, respectively and fixedly arranged on the reciprocating knife holder 106 and the fixed seat 111, the springs 109 comprise four parts, one end is fixedly arranged on the reciprocating knife holder 106, the other end is fixedly arranged on the fixed seat 111, two groups of the cutting device 1 are fixedly arranged on the collector housing 3 through the bolt 105, the electromagnets 108 are the same coil, and are electrified to repel each other, the reciprocating tool apron 106 drives the cutting knives 101 to extend, the cutting edges 102 of the two cutting knives 101 are contacted to cut off the garbage, when the electromagnets 108 are powered off, the reciprocating tool apron 106 drives the cutting knives 101 to retract under the action of the spring 109, and the long garbage is cut off through the alternate motion.

Further, the screen drum device 2 comprises an electromagnet switch 201, a fishing handle 202, a flange 203, an electromagnet 204, a spiral blade 205, a hollow groove 206, a conical basket 207, screen holes 208, a power drive 209, a sealing plate 210, an outlet 211, a cross key 212 and a plate body 213, wherein the conical basket 207 is conical, so that water flow is convenient to mount and attract, the screen holes 208 are uniformly distributed on the periphery, the water flow can be discharged through the screen holes 208 to trap garbage, the spiral blade 205 is fixedly mounted on the periphery of the outer side of the conical basket 207, the hollow groove 206 is arranged between the spiral blades 205, the spiral blade 205 introduces the water flow into the conical basket 207 when the conical basket 207 rotates, the flange 203 is rotatably mounted at the groove position at the upper end of the conical basket 207, the flange 203 can rotate relative to the conical basket 207, the four pieces of the electromagnet 204 are respectively and uniformly and fixedly mounted at the bottom of the flange 203, the fishing handle 202 is fixedly mounted at the upper end of the flange 203, the electromagnet switch 201 is fixedly mounted at the lower end of the middle of the fishing handle 202, during salvaging the toper basket 207, salvage tool salvages and can touch the electromagnet switch 201 during handle 202, therefore the electro-magnet 204 outage no longer has the appeal, and a sieve section of thick bamboo device 2 can be salvaged, clears up rubbish, and shrouding 210 edge round pin rotates to be installed in toper basket 207 bottom one side, and power drive 209 and shrouding 210 edge round pin axle fixed connection drive shrouding 210 rotatory rubbish and unload through dead slot 206. The closing plate 210 includes a cross key 212 and a plate body 213, and the cross key 212 is fixed to a middle portion of the plate body 213.

Further, the collector shell 3 comprises a guide plate 301, a support plate 302, a shell 303, a ring groove 304, support rib plates 305, mounting holes 306, mounting holes 307, fan-shaped holes 308 and a support plate 309, the shell 303 is in an octagonal cylinder shape, the ring groove 304 is arranged at the upper end of the shell 303, an electromagnet 204 at the lower end of a flange 203 of the screen cylinder device 2 is adsorbed to the bottom surface of the ring groove 304 so as to limit the screen cylinder device 2, two support plates 302 are respectively welded at the outer corner of the upper end of the shell 303 in a group, the guide plate 301 is welded at the outer side of the support plate 302 in an arc shape so as to guide garbage, so that garbage can pass between two cutting devices 1 and be conveniently cut off, the four support rib plates 305 are respectively and uniformly welded at the outer side of the bottom of the shell 303, the mounting holes 306 and the mounting holes 307 are respectively arranged at the side and the bottom of the support rib plates 305, the support plates 309 are fixedly installed at the bottom of the shell 303, and the four fan-shaped holes 308 are reserved, facilitating the passage of water.

Further, the horizontal migration screw 4 includes bottom plate 401, screw shell 402, helical blade 403, power drive 404, horizontal migration screw 4 adopt prior art structure can, screw shell 402 fixed mounting is on bottom plate 401, helical blade 403 rotates and installs on screw shell 402, power drive 404 drives helical blade 403 and rotates, vertical migration screw 5 and horizontal migration screw 4 are same part, horizontal migration screw 4 starts the vertical position that can adjust this fisher at the surface of water, vertical migration screw 5 starts the horizontal position that can adjust whole fisher.

Further, the cross-shaped groove rotary table 6 comprises a cross-shaped groove 601 and a disc 602, wherein the cross-shaped groove 601 is formed in the middle of the disc 602, and the cross-shaped groove 601 is matched with the cross-shaped key 212. The cross slot rotary table 6 drives the screen cylinder device 2 (except the electromagnet switch 201, the fishing handle 202, the flange 203 and the electromagnet 204) to rotate through the cross slot 601 and the cross key 212.

The working principle is as follows: the invention comprises a cutting device 1, a screen drum device 2, a collector shell 3, a horizontal moving propeller 4, a vertical moving propeller 5, a cross groove rotary table 6, a waterproof motor 7 and a shield 8, wherein the collector shell 3 is in a shape of 8 deformed cylinder, one group of two cutting devices 1 are respectively and fixedly arranged on the outer side of the upper end of the collector shell 3, the cutting device 1 cuts long garbage such as branches, straws and the like to be convenient to enter the screen drum device 2, not only the garbage is prevented from being clamped in the screen drum device 2, but also the space of the screen drum device 2 is saved, the cross groove of the cross groove rotary table 6 faces upwards and is rotatably arranged at the bottom end inside the collector shell 3, the waterproof motor 7 is fixedly arranged on the collector shell 3, the driving shaft of the waterproof motor 7 is aligned with the axis of the cross groove rotary table 6, the driving shaft of the waterproof motor 7 is fixedly connected with the end part of the cross groove rotary table 6, the screen drum device 2 is inserted into the collector shell 3, upper end fixed mounting is on collector casing 3, and the lower extreme inserts in the cross recess of cross recess carousel 6, and waterproof motor 7 rotates, drives cross recess carousel 6 and rotates to cross recess carousel 6 drives sieve section of thick bamboo device 2 and rotates, and sieve section of thick bamboo device 2 is inside with rivers introduction sieve section of thick bamboo device 2, thereby rubbish is held back to sieve section of thick bamboo device 2, and water discharges away through sieve section of thick bamboo device 2, and guard shield 8 fixed mounting covers the motor on collector casing 3, prevents that the motor from exposing the protection motor.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. The utility model provides a surface of water rubbish collector, includes cutting device (1), a sieve section of thick bamboo device (2), collector casing (3), horizontal migration screw (4), vertical removal screw (5), cross recess carousel (6), waterproof motor (7), guard shield (8), its characterized in that: collector casing (3) are (8) deformation tube-shape, cutting device (1) is two a set ofly, and fixed mounting is in the upper end outside of collector casing (3) respectively, the cross recess of cross recess carousel (6) up, rotates and installs in the inside bottom of collector casing (3), waterproof motor (7) fixed mounting is on collector casing (3), and waterproof motor (7) drive shaft and cross recess carousel (6) axis align, and waterproof motor (7) drive shaft and cross recess carousel (6) tip fixed connection, sieve section of thick bamboo device (2) insert to collector casing (3) inside, upper end fixed mounting is on collector casing (3), and the lower extreme inserts in the cross recess of cross recess carousel (6), guard shield (8) fixed mounting covers the motor on collector casing (3).

2. A water surface garbage collector according to claim 1, wherein the cutting device (1) comprises a cutting knife (101), a cutting edge (102), a bolt (103), a knife holder (104), a bolt (105), a reciprocating knife holder (106), a sliding sleeve (107), an electromagnet (108), a spring (109), a loop bar (110) and a fixed seat (111), and is characterized in that: the cutting knife (101) is fixedly arranged on the reciprocating knife holder (106) through a bolt (103), the cutting knife (101) comprises a cutting edge (102) and a knife holder (104), the sliding sleeves (107) are four pieces and are respectively and fixedly arranged at the positions, close to four corners, of the reciprocating tool apron (106), the four loop bars (110) are respectively and fixedly arranged at the positions, close to four corners, of the fixed seat (111), corresponding to the sliding sleeve (107), the sliding sleeve (107) is arranged on the sleeve rod (110) in a sliding way, two electromagnets (108) are in one group, the axes are opposite, three groups are formed, and the electromagnets are respectively and fixedly arranged on the reciprocating tool apron (106) and the fixed seat (111), the number of the springs (109) is four, one end of each spring is fixedly installed on the reciprocating tool apron (106), the other end of each spring is fixedly installed on the fixed seat (111), and two groups of the cutting devices (1) are fixedly installed on the collector shell (3) through bolts (105).

3. The water surface garbage collector of claim 1, wherein the screen drum device (2) comprises an electromagnet switch (201), a fishing handle (202), a flange (203), an electromagnet (204), a helical blade (205), a hollow groove (206), a conical basket (207), a screen hole (208), a power drive (209), a sealing plate (210), an outlet (211), a cross key (212) and a plate body (213), and is characterized in that: toper basket (207) are conical shape, evenly distributed sieve mesh (208) on every side, helical blade (205) fixed mounting sets up dead slot (206) between helical blade (205) around toper basket (207) outside, flange (203) rotate and install in toper basket (207) upper end groove position, and even fixed mounting is in flange (203) bottom totally four pieces for electro-magnet (204) totally, salvage handle (202) fixed mounting in flange (203) upper end, electro-magnet switch (201) fixed mounting is in the middle of salvaging handle (202) lower extreme, shrouding (210) edge round pin axle rotates and installs in toper basket (207) bottom one side, power drive (209) and shrouding (210) edge round pin axle fixed connection. The closing plate (210) comprises a cross key (212) and a plate body (213), and the cross key (212) is fixed in the middle of the plate body (213).

4. The water surface garbage collector of claim 1, wherein the collector shell (3) comprises a guide plate (301), a support plate (302), a shell (303), a ring groove (304), a support rib plate (305), a mounting hole (306), a mounting hole (307), a fan-shaped hole (308) and a support plate (309), and is characterized in that: casing (303) are the octagon tube-shape, casing (303) upper end sets up annular (304), two a set of welding respectively in the upper end outside corner of casing (303) are altogether in backup pad (302), deflector (301) are circular-arc welding in a set of backup pad (302) outside, support gusset (305) four respectively the homogeneous welding in casing (303) bottom outside altogether, mounting hole (306) and mounting hole (307) set up respectively in the lateral part and the bottom of supporting gusset (305), backup pad (309) fixed mounting is in casing (303) bottom, leaves four scallop hole (308).

5. A water surface waste collector as claimed in claim 1, said horizontally moving propeller (4) comprising a base plate (401), a propeller housing (402), helical blades (403), a power drive (404), characterized in that: the horizontal movement propeller (4) adopts the prior art structure can, propeller shell (402) fixed mounting is on bottom plate (401), helical blade (403) rotate and install on propeller shell (402), power drive (404) drive helical blade (403) rotate, and vertical movement propeller (5) and horizontal movement propeller (4) are same part.

6. A surface waste collector according to claim 1, said cross recess carousel (6) comprising a cross recess (601), a disc (602), characterized in that: the middle of the disc (602) is provided with a cross-shaped groove (601), and the cross-shaped groove (601) is matched with the cross-shaped key (212).