CN217818762U

CN217818762U - Geological compass with protective structure

Info

Publication number: CN217818762U
Application number: CN202220877079.6U
Authority: CN
Inventors: 唐有为
Original assignee: Hubei Sanxin Gold Copper Ltd
Current assignee: Hubei Sanxin Gold Copper Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-11-15
Anticipated expiration: 2032-04-15

Abstract

The utility model belongs to equipment field for geological survey, the utility model discloses a geological compass with protective structure, including anticollision lid and vibration damping mount, vibration damping mount's outer wall all around evenly is provided with three gear groove, anticollision lid inner wall all around and the position department that corresponds each gear groove all is provided with the round pin piece, each round pin piece joint is in the gear inslot portion that corresponds, through switching over the round pin piece at the height of gear inslot portion change anticollision lid joint in the vibration damping mount top in the joint position of gear inslot portion to realize the geological compass user state that has protective structure and carry the switching of protection state, the utility model discloses a round pin piece that anticollision lid set up sets up with the many grades of joints in the gear groove of vibration damping mount setting to combine the use of spring location post and buffering reed, make this compass anticollision, prevent that the falling performance promotes by a wide margin, thereby effectively protect the safety of compass main part when carrying and using, prevent that accidental drop or outside extrusion from causing the condition that the compass main part damaged to take place.

Description

Geological compass with protective structure

Technical Field

The utility model relates to an equipment field is used in the geological drilling particularly, relates to a geological compass with protective structure.

Background

A geological compass also called as a pocket theodolite mainly comprises a magnetic needle, a level meter and an inclinometer. The structure is divided into a chassis, a shell and an upper cover, main instruments are fixed on the chassis, and the chassis, the shell and the upper cover are connected into a whole by a hinge. The device can be used for identifying the direction, determining the position, measuring the occurrence of the geologic body, sketching a topographic map and the like, and is an indispensable tool for field geological work.

However, among the prior art, the compass that geological survey used often can fall subaerially carelessly when the outdoor use, because geological compass does not have buffering protector, cause compass internals to damage easily, greatly reduced the life of compass, and because survey the place and be mostly for the field, and the topography landform is complicated changeable, when needs place the compass on ground and measure, because ground pot hole depression is uneven, lead to the geological compass can't place stably, need with the help of the foreign object and consume the long time adjustment rear and can measure, will take place to incline carelessly a little, slide, bring a great deal of inconvenience for surveying work, and open-air ground has the ponding problem more, the operation of soaking in ponding for a long time of compass will shorten its life, consequently, need design a kind of geological compass to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a realize like this:

a geological compass with a protective structure comprises an anti-collision cover and a shock absorption base, wherein three gear grooves are uniformly formed in the peripheral outer wall of the shock absorption base, pin blocks are arranged on the periphery of the inner wall of the anti-collision cover and correspond to the gear grooves, each pin block is clamped in the corresponding gear groove, and the clamping position of the pin block in the gear groove is switched to change the height of the anti-collision cover clamped at the top of the shock absorption base, so that the switching between the use state and the carrying and protecting state of the geological compass with the protective structure is realized;

a convex lens is arranged in the center of the top of the anti-collision cover, a plurality of spring positioning columns are uniformly arranged on the periphery of the top of the inner wall of the anti-collision cover, sponge sleeves are fixedly connected with the outer walls of the spring positioning columns, a compass main body is arranged in the damping base, a circle of limiting arris is arranged in the middle of the peripheral surface of the compass main body, a circle of flange is arranged on the periphery of the inner wall of the damping base and close to the middle, the compass main part pass through spacing arris joint in the flange bottom, the central authorities of vibration damping mount inner wall bottom are provided with the buffering reed, the top of buffering reed is hugged closely the bottom of compass main part, a plurality of mounting grooves have evenly been seted up to vibration damping mount's bottom, each the inside of mounting groove all is provided with folding supporting legs for keep vibration damping mount steadily places at complicated earth's surface.

In an embodiment of the present invention, the gear groove is composed of a detaching groove, an observing gear groove and a protecting gear groove, the lengths of which are sequentially reduced, the bottoms of the detaching groove, the observing gear groove and the protecting gear groove are located on the same horizontal plane and are mutually communicated, the top of the detaching groove extends to the top of the damping base, the pin block is respectively clamped inside the observing gear groove or the protecting gear groove by the rotation of the anti-collision cover, and a buffer spring is arranged between the top of the inner wall of the anti-collision cover and the top of the damping base;

when the pin block is clamped in the protective baffle groove, the telescopic end of each spring positioning column is tightly attached to the top surface of the compass main body, a pointer is arranged in the center of the top of the compass main body, and the pointer is in friction contact with each sponge sleeve to keep a fixed state, so that the carrying and protection state of the geological compass with the protective structure is realized;

when the pin block is clamped in the observation gear groove, the telescopic end of each spring positioning column is separated from the top surface of the compass main body, and each sponge sleeve is separated from the pointer, so that the use state of the geological compass with the protective structure is realized;

when each pin block slides into each disassembling groove, the anti-collision cover and the damping base are disassembled.

The utility model discloses an in one embodiment, the outside cover of compass main part is equipped with the buffering sealing washer, the buffering sealing washer is located the flange with between the spacing arris.

The utility model discloses an in the embodiment, folding supporting legs include the folding rod and grab the floor, the one end of folding rod articulate in the inside of mounting groove is just kept away from the one end of vibration damping mount vertical center line, grab the middle part on floor and seted up the folding tank, the other end of folding rod pass through the axis body articulate in the inside middle part department that just is close to of folding tank, the surface cover of axis body is equipped with the torsional spring, the both ends of torsional spring respectively with the folding rod with it is fixed to grab the floor, grab floor buckle connect inside the mounting groove, and the bottom with vibration damping mount's bottom flushes, the bottom of grabbing the floor is provided with the slipmat, the circular arc groove has been seted up to the bottom central authorities of slipmat.

The utility model discloses an in one embodiment, the mounting groove inner wall is kept away from one side of vibration damping mount vertical center line is provided with the friction pad, the friction pad with the setting is hugged closely to the one end of folding rod, the friction pad adopts the silica gel material to make.

The utility model discloses an in one embodiment, the front and the back of grabbing the floor are provided with two at least hemisphere archs along length direction equidistance, the inside front and the back of mounting groove just correspond each hemisphere protruding department all is provided with half spherical groove, the protruding joint of hemisphere in inside half spherical groove.

In an embodiment of the present invention, the handle is detachably connected to one side of the damping base.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a many grades of joints setting of pin piece that anticollision lid set up and the gear groove of vibration damping mount setting to realize the user state and the switching of protection state of this compass, and combine the use of spring location post and buffer reed, make this compass anticollision, prevent falling the performance and promote by a wide margin, thereby effectively protect the safety of compass main part when carrying and using, prevent that the accident from dropping or outside extrusion from causing the condition emergence that the compass main part damaged.

2. The utility model discloses a set up folding supporting legs bottom vibration damping mount, and through the turned angle and the location that set up friction pad control folding rod, thereby make the required gesture of adjustment that folding supporting legs can be nimble, and simultaneously, through folding rod and the articulated department of grabbing the floor set up the torsional spring, thereby make and grab the unevenness that the floor can self-adaptation ground, set up through the structure, make this compass can adjust its gesture to complicated changeable open-air topography, thereby improve measurement accuracy, shorten the time of user's timing compass, and the work efficiency is improved, and simultaneously, the ponding of earth's surface low-lying department can be placed to the erosion of compass body to the compass dish of being raised, thereby guarantee the clean and dry of compass body, thereby prolong its life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic view of the front view of the whole cross-section structure of the present invention;

fig. 4 is an enlarged structural view at B.

Description of the reference numerals: 1. an anti-collision cover; 101. a convex lens; 102. a pin block; 103. a spring positioning post; 104. a sponge sleeve; 2. a damping mount; 201. a gear groove; 201a, a disassembly groove; 201b, an observation gear groove; 201c, a protective baffle groove; 202. a flange; 203. mounting grooves; 3. a compass body; 301. a pointer; 302. a limiting edge; 4. folding the supporting legs; 401. a friction pad; 402. a folding bar; 403. a torsion spring; 404. a folding slot; 405. a non-slip mat; 406. grabbing a floor; 5. a handle; 6. a buffer reed; 7. a buffer sealing ring; 8. a buffer spring.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Examples

Referring to the attached drawings 1-4, the utility model provides a geological compass with a protective structure, which comprises an anti-collision cover 1 and a damping base 2, wherein the peripheral outer wall of the damping base 2 is uniformly provided with three gear grooves 201, pin blocks 102 are arranged on the periphery of the inner wall of the anti-collision cover 1 and corresponding to the positions of the gear grooves 201, each pin block 102 is clamped inside the corresponding gear groove 201, and the height of the clamping position of the anti-collision cover 1 on the top of the damping base 2 is changed by switching the clamping position of the pin block 102 inside the gear groove 201, so that the switching between the use state and the carrying protective state of the geological compass with the protective structure is realized;

top center of anticollision lid 1 is provided with convex lens 101, the inner wall top of anticollision lid 1 evenly is provided with a plurality of spring location post 103 all around, the outer wall fixedly connected with sponge sleeve 104 of spring location post 103, the inside of vibration damping mount 2 is provided with compass main part 3, the middle part of compass main part 3 surface all around is provided with round spacing arris 302, vibration damping mount 2 inner wall is provided with round flange 202 all around and near middle part department, compass main part 3 is in flange 202 bottom through spacing arris 302 joint, the central authorities of vibration damping mount 2 inner wall bottom are provided with buffering reed 6, the bottom of compass main part 3 is hugged closely at the top of buffering reed 6, a plurality of mounting grooves 203 have evenly been seted up to vibration damping mount 2's bottom, the inside of each mounting groove 203 all is provided with folding supporting legs 4, be used for keeping vibration damping mount 2 to place steadily at complicated earth's surface, through setting up buffering reed 6 in the bottom at compass main part 3, and cooperate the buffering sealing washer 7 that sets up between flange 202 and the spacing arris 302, thereby realize the shock attenuation and sealed of compass main part 3, when compass main part 3 is impacted by external force, through the elastic deformation absorption external force of spring to absorb external force to cushion reed 3, thereby make the switch over the three spring location post 3, the switch of the switch over the spring set up the top of anti-impact damping mount 3 simultaneously, thereby make the anti-collision spring set up the top of anti-collision spring 3 and the top of anti-collision spring 3, thereby make it is preferably the top of the anti-collision spring to make the anti-collision spring to have the anti-collision spring to be connected with the top of the anti-collision spring 3, thereby make it is the top of the anti-collision spring 3.

In an embodiment of the present invention, further, the gear groove 201 is composed of a detaching groove 201a, an observing gear groove 201b and a protecting gear groove 201c, the lengths of which are sequentially reduced, the bottoms of the detaching groove 201a, the observing gear groove 201b and the protecting gear groove 201c are located on the same horizontal plane and are mutually communicated, the top of the detaching groove 201a extends to the top of the damping base 2, the pin 102 is respectively clamped inside the observing gear groove 201b or the protecting gear groove 201c through the rotation of the anti-collision cover 1, and a buffer spring 8 is arranged between the top of the inner wall of the anti-collision cover 1 and the top of the damping base 2;

when the pin block 102 is clamped in the protective baffle groove 201c, the telescopic end of each spring positioning column 103 is tightly attached to the top surface of the compass main body 3, a pointer 301 is arranged in the center of the top of the compass main body 3, the pointer 301 is kept in a fixed state through frictional contact with each sponge sleeve 104, so that a carrying protective state of the geological compass with a protective structure is realized, the collision prevention cover 1 is pressed and rotated by a user to compress the buffer spring 8, meanwhile, the pin block 102 is withdrawn from the observation baffle groove 201b and slides into the protective baffle groove 201c through a communication part, after the collision prevention cover 1 is loosened, the pin block 102 is clamped and fixed in the protective baffle groove 201c through the reset acting force of the buffer spring 8, so that the clamping height of the collision prevention cover 1 and the damping base 2 is reduced, the telescopic end of the spring positioning column 103 descends to be tightly attached to the top surface of the compass main body 3 to realize elastic fixation, and the pointer 301 positions of the descending sponge sleeves 104 are interfered with the pointer 301 of the compass main body 3 to fix the pointer 301 position, so that the integral protection function of the compass main body 3 is realized; the compass in a protection state is convenient to carry, and can effectively protect parts of the compass main body 3 from being impacted under the condition of accidental falling, so that the parts are prevented from being deformed and damaged;

when the pin blocks 102 are clamped in the observation gear grooves 201b, the telescopic ends of the spring positioning columns 103 are separated from the top surface of the compass main body 3, the sponge sleeves 104 are separated from the pointer 301, so that the use state of the geological compass with a protective structure is realized, the anti-collision cover 1 is pressed and rotated, so that the pin blocks 102 correspondingly slide into the observation gear grooves 201b and are clamped and fixed, the relative position of the anti-collision cover 1 and the damping base 2 is changed, the convex lens 101 is far away from the compass main body 3, the pointer 301 and scale numerical values can be conveniently observed, meanwhile, the spring positioning columns 103 are separated from the top of the compass main body 3, and the limitation on the pointer 301 is simultaneously removed by the sponge sleeves 104, so that the use state of the compass is realized;

when each pin block 102 slides into each disassembly groove 201a, the crash cover 1 and the shock absorption base 2 are disassembled, and the crash cover 1 can be disassembled from the top of the shock absorption base 2 by sliding the pin block 102 into the disassembly groove 201a and sliding out from the top of the shock absorption base 2.

The utility model discloses an in one embodiment, it is further, the outside cover of compass main part 3 is equipped with buffering sealing washer 7, and buffering sealing washer 7 is located between flange 202 and spacing arris 302, and the inside of buffering sealing washer 7 is hollow structure, can take place deformation when receiving the extrusion to play certain sealed and buffering effect, further improve the working property of this compass under the harsh service condition in the field.

In an embodiment of the present invention, further, the folding supporting foot 4 comprises a folding rod 402 and a grabbing floor 406, one end of the folding rod 402 is hinged inside the mounting groove 203 and is far away from one end of the vertical center line of the damping base 2, a folding groove 404 is formed in the middle of the grabbing floor 406, the other end of the folding rod 402 is hinged inside the folding groove 404 and is close to the middle through a shaft body, a torsion spring 403 is sleeved on the surface of the shaft body, two ends of the torsion spring 403 are respectively fixed with the folding rod 402 and the grabbing floor 406, the grabbing floor 406 is connected inside the mounting groove 203 in a buckling manner, the bottom of the grabbing floor 406 is flush with the bottom of the damping base 2, a non-slip mat 405 is arranged at the bottom of the grabbing floor 406, an arc groove is formed in the center of the bottom of the non-slip mat 405, and the grabbing floor 406 is buckled out from the mounting groove 203, the folding rod 402 is rotated to be unfolded and supported at the bottom of the damping base 2, meanwhile, the torsion spring 403 is arranged at the hinged position of the folding rod 402 and the grabbing floor 406, the hinged angle of the folding rod 402 and the grabbing floor 406 is set to be the angle parallel to the horizontal plane of the grabbing floor 406 and then is connected with the initial state of the torsion spring 403, so that the grabbing floor 406 is separated from the mounting groove 203 and is in the best ground supporting posture through resetting of the torsion spring 403, and through the characteristics of the torsion spring 403, the grabbing floor 406 has the function of adaptively changing the supporting angle and attaching to the ground when dealing with complex terrains, meanwhile, the anti-skid pad 405 arranged at the bottom of the grabbing floor is matched to further improve the stability of the folding supporting foot 4 and the capacity of adapting to the complex terrains, so that the compass is more convenient and safer to use, and the measured value is more accurate.

The utility model discloses an in an embodiment, it is further, one side that damping base 2 vertical center line was kept away from to mounting groove 203 inner wall is provided with friction pad 401, the setting is hugged closely with the one end of folding rod 402 to friction pad 401, friction pad 401 adopts the silica gel material to make, through setting up friction pad 401, and interfere the rotation of folding rod 402 through friction pad 401, thereby realize folding rod 402's turned angle adjustment and location through friction and tensile force, make folding supporting legs 4's support gesture more nimble changeable, thereby better reply complicated topography, simultaneously because open-air topography hollow is uneven, often accompany ponding, through setting up folding supporting legs 4, raise the body of this compass, thereby guarantee the clean and dry of this compass, prolong its life.

The utility model discloses an in an embodiment, it is further, the front and the back of grabbing floor 406 are provided with two at least hemisphere archs along the impartial distance of length direction, and the inside front and the back of mounting groove 203 just correspond each hemisphere protruding department and all are provided with half spherical groove, and the protruding joint of hemisphere is inside half spherical groove.

In an embodiment of the present invention, further, a handle 5 is detachably connected to one side of the damping base 2.

The working principle of the geological compass with the protective structure is as follows: at first, press and rotatory anticollision lid 1 through the user, and adjust the lug to observing shelves groove 201b, thereby make this compass switch to user state, can survey the operation through handheld handle 5, place this compass in measuring the face and survey time measuring if need, can follow 2 bottoms of vibration damping mount and detain folding supporting legs 4 and adjust and use after suitably expanding the gesture, after using up, through receiving back folding rod 402 and will grab floor 406 card and go into the inside resetting of mounting groove 203, and through pressing anticollision lid 1 once more, make round pin piece 102 and protection shelves groove 201c joint, thereby make this compass switch to protection state, conveniently carry.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The geological compass with the protection structure is characterized by comprising an anti-collision cover (1) and a damping base (2), wherein three gear grooves (201) are uniformly formed in the peripheral outer wall of the damping base (2), pin blocks (102) are arranged on the periphery of the inner wall of the anti-collision cover (1) and correspond to the positions of the gear grooves (201), each pin block (102) is clamped in the corresponding gear groove (201), and the clamping position of each pin block (102) in the gear groove (201) is switched to change the height of the anti-collision cover (1) clamped at the top of the damping base (2), so that the geological compass with the protection structure is switched between a use state and a carrying protection state;

the utility model discloses a damping device, including anticollision lid (1), the top of anticollision lid (1) is central to be provided with convex lens (101), the inner wall top of anticollision lid (1) evenly is provided with a plurality of spring location post (103) all around, the outer wall fixedly connected with sponge sleeve pipe (104) of spring location post (103), the inside of vibration damping mount (2) is provided with compass main part (3), the middle part on compass main part (3) surface all around is provided with round spacing arris (302), vibration damping mount (2) inner wall just is provided with round flange (202) near middle part department all around, compass main part (3) pass through spacing arris (302) joint in flange (202) bottom, the central authorities of vibration damping mount (2) inner wall bottom are provided with buffering reed (6), the top of buffering reed (6) is hugged closely the bottom of compass main part (3), even a plurality of mounting groove (203) have been seted up to the bottom of vibration damping mount (2), each the inside of mounting groove (203) all is provided with folding supporting legs (4), is used for keeping vibration damping mount (2) are steadily placed at complicated earth's surface.

2. The geological compass with a protective structure according to claim 1, wherein the gear groove (201) is composed of a disassembly groove (201 a), an observation gear groove (201 b) and a protection gear groove (201 c) which are sequentially reduced in length, the bottoms of the disassembly groove (201 a), the observation gear groove (201 b) and the protection gear groove (201 c) are located on the same horizontal plane and are communicated with each other, the top of the disassembly groove (201 a) extends to the top of the shock absorption base (2), the pin block (102) is respectively clamped inside the observation gear groove (201 b) or the protection gear groove (201 c) through the rotation of the anti-collision cover (1), and a buffer spring (8) is arranged between the top of the inner wall of the anti-collision cover (1) and the top of the shock absorption base (2);

when the pin block (102) is clamped in the protective baffle groove (201 c), the telescopic end of each spring positioning column (103) is tightly attached to the top surface of the compass main body (3), a pointer (301) is arranged in the center of the top of the compass main body (3), and the pointer (301) is in frictional contact with each sponge sleeve (104) to keep a fixed state, so that the geological compass with the protective structure is in a carrying and protective state;

when the pin block (102) is clamped in the observation retaining groove (201 b), the telescopic end of each spring positioning column (103) is separated from the top surface of the compass main body (3), and each sponge sleeve (104) is separated from the pointer (301) so as to realize the use state of the geological compass with the protective structure;

when the pin blocks (102) slide into the dismounting grooves (201 a), the collision-proof cover (1) and the shock absorption base (2) are dismounted.

3. Geological compass with protective structure, according to claim 2, characterized in that the exterior of the compass body (3) is sleeved with a buffer sealing ring (7), said buffer sealing ring (7) being located between the flange (202) and the limit rib (302).

4. The geological compass with a protective structure according to claim 1, wherein the folding supporting foot (4) comprises a folding rod (402) and a grabbing floor (406), one end of the folding rod (402) is hinged inside the mounting groove (203) and is far away from one end of the vertical center line of the damping base (2), a folding groove (404) is formed in the middle of the grabbing floor (406), the other end of the folding rod (402) is hinged inside the folding groove (404) through a shaft body and is close to the middle, a torsion spring (403) is sleeved on the surface of the shaft body, two ends of the torsion spring (403) are respectively fixed with the folding rod (402) and the grabbing floor (406), the grabbing floor (406) is connected inside the mounting groove (203) in a buckling mode, the bottom of the grabbing floor is flush with the bottom of the damping base (2), a non-slip mat (405) is arranged at the bottom of the grabbing floor (406), and an arc groove is formed in the center of the bottom of the non-slip mat (405).

5. The geological compass with a protective structure according to claim 4, wherein a friction pad (401) is arranged on one side of the inner wall of the mounting groove (203) far away from the vertical center line of the damping base (2), the friction pad (401) is tightly attached to one end of the folding rod (402), and the friction pad (401) is made of silica gel.

6. The geological compass with protective structure, according to claim 4, characterized in that the front and back of the floor grasping plate (406) are provided with at least two hemispherical protrusions at equal distance along the length direction, the front and back of the inside of the mounting groove (203) and corresponding to each hemispherical protrusion are provided with hemispherical grooves, and the hemispherical protrusions are clamped inside the hemispherical grooves.

7. Geological compass with shelter structure, according to claim 1, characterized in that a handle (5) is removably connected to one side of the shock-absorbing base (2).