CN109581790B - Projecting apparatus of college english classroom easy access - Google Patents

Projecting apparatus of college english classroom easy access Download PDF

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Publication number
CN109581790B
CN109581790B CN201910025854.8A CN201910025854A CN109581790B CN 109581790 B CN109581790 B CN 109581790B CN 201910025854 A CN201910025854 A CN 201910025854A CN 109581790 B CN109581790 B CN 109581790B
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China
Prior art keywords
heat dissipation
ring
axial
seat shell
assembly
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CN201910025854.8A
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CN109581790A (en
Inventor
韩睿
尹衍林
李茜
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Heilongjiang University of Science and Technology
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Heilongjiang University of Science and Technology
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Publication of CN109581790A publication Critical patent/CN109581790A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B5/00—Electrically-operated educational appliances
    • G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention discloses a projector convenient to overhaul in a college English classroom, which comprises a seat shell, a lower cover plate, a projection lens angle adjusting assembly, a conveniently-disassembled lower connecting assembly, an upper fixing column, an elastic anti-seismic arc spring plate and an upper auxiliary fixing and connecting assembly, wherein a heat radiating assembly is arranged in the seat shell, and the lower cover plate is detachably arranged below the seat shell; the projector can be maintained and disassembled very conveniently, is installed very quickly and simply, has good heat dissipation effect of the heat dissipation assembly and uniform heat dissipation when in use, can well realize the damping effect by the elastic anti-seismic arc spring plate, and avoids the fatigue damage of rigid connection.

Description

Projecting apparatus of college english classroom easy access
Technical Field
The invention relates to a projector convenient to overhaul in a college English classroom, and belongs to the technical field of projector equipment.
Background
At present, for the English teaching of university, generally need adopt the projecting apparatus to accomplish the study and the teaching of college's english course. The convenience of english teaching not only can be simplified greatly to the projecting apparatus, moreover, can effectively improve english teaching quality. Present university's projecting apparatus is generally fixed at the wall body top, and this kind of fixed mode is difficult to dismantle, in case the projecting apparatus breaks down, will hardly maintain, needs to dismantle fixed expansion bolts, and installs after maintaining well again and leads to expansion bolts not hard up very easily, leads to the installation fixity variation, and if look for the position again and install, then appear the unsharp problem of picture very easily, lead to maintaining very loaded down with trivial details. In addition, because the projector oscillates the cooling fan during operation, the rigid connection adopting the expansion bolts easily causes an unstable phenomenon after long-term oscillation, and the failure is easy to occur after the rigid connection is finished for a long time. In addition, such a rigid connection is extremely prone to accidents in the event of small earthquakes and the like.
Aiming at the problems, the invention provides the projector which is convenient to overhaul in a college English classroom, improves the convenience of maintenance and installation of the projector, and is convenient for adjusting the projection angle of the projector.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a projector convenient for overhaul in a college English classroom is characterized by comprising a seat shell, a lower cover plate, a projection lens angle adjusting assembly, a conveniently-disassembled lower connecting assembly, an upper fixing column, an elastic anti-seismic arc spring plate and an upper auxiliary fixing and connecting assembly, wherein a heat dissipation assembly is arranged in the seat shell, and the lower cover plate is detachably arranged below the seat shell;
the upper end of the seat shell is connected to the lower end of the upper fixing column through the conveniently detachable lower connecting assembly;
the upper end of the upper fixing column is fixed on the elastic anti-seismic arc-shaped spring plate, and the upper end surface of the elastic anti-seismic arc-shaped spring plate is of a concave structure;
the upper end of the elastic shock-resistant arc-shaped spring plate is fixed on the top of a fixed wall by three connecting pins, and the connecting pins extend into and are fixed on the top of the fixed wall;
the three connecting pins are connected together by the upper auxiliary fixed connecting assembly;
the seat shell is internally provided with a circuit control module in a modular design, and one side of the seat shell, which is opposite to the heat dissipation air outlet end of the heat dissipation assembly, is provided with a projection lens by adopting a projection lens angle adjusting assembly, and the angle of the projection lens can be adjusted.
Further, preferably, the projection lens angle adjusting assembly comprises an abutting adjusting column, an outer enveloping hinge ring, an inner enveloping hinge ring, an elastic head, an adjusting screw hole and an abutting adjusting nut, the inner enveloping hinge ring is arranged in a seat shell body in the seat shell, the outer enveloping hinge ring is integrally arranged on the projection lens, the inner enveloping hinge ring extends into an area enclosed by the outer enveloping hinge ring, the end part of the outer enveloping hinge ring extends into the center of the inner enveloping hinge ring, the end part of the outer enveloping hinge ring is provided with the elastic head, the elastic head is clamped in the center of the inner enveloping hinge ring, the adjusting screw hole is arranged at the lower end of the seat shell body in the seat shell, the abutting adjusting column is arranged on the adjusting screw hole in an adjusting manner, and the end part of the abutting adjusting column abuts against the projection lens surface, the external thread of the abutting adjusting column is connected with the abutting adjusting nut.
Further, preferably, the elastic shock-resistant arc-shaped spring plate is made of a spring steel plate with a thin middle rear edge part.
Further, preferably, the conveniently detachable lower connecting assembly comprises an upper axial positioning disc, an outer locking sleeve, a lower fixed seat, a lower axial positioning disc, an axial connecting ring I and an axial connecting ring II, a plug is arranged at the lower end of the upper fixed column, an axial connecting groove is arranged on the circumference of the lower side of the upper fixed column, the lower fixed seat is fixedly arranged on the seat shell, a socket is arranged at the upper end of the lower fixed seat and is connected with the plug in an inserting manner, an axial connecting groove is also arranged on the circumference of the lower fixed seat, after the socket is connected with the plug in an inserting manner, the axial connecting ring I and the axial connecting ring II are respectively buckled and connected on the axial connecting groove so as to connect the socket and the plug together axially, the cross sections of the axial connecting ring I and the axial connecting ring II are both semi-circular structures, and the outer locking sleeve is coaxially sleeved on the outer portions of the axial connecting ring I and the, the upper end of the outer locking sleeve is positioned on the upper fixing column through an upper axial positioning disc for upper end axial positioning and fixing, and the lower end of the outer locking sleeve is positioned on the lower fixing seat through a lower axial positioning disc for lower end axial positioning and fixing.
Further, preferably, the outer locking sleeve is fixed on the axial connecting ring I or the axial connecting ring II by adopting a plurality of locking bolts.
Furthermore, as an optimization, a positioning clamp is arranged at the insertion joint of the socket and the plug, a blind hole is formed in the lower end of the upper fixing column, a blind hole is also formed in the upper end of the lower fixing seat, and at least one central positioning column extends into the blind hole of the upper fixing column and the blind hole of the lower fixing seat.
Further, as preferred, go up supplementary fixed connection subassembly including connecting body, lock ring, locking clamping piece and screw hole, connecting body is provided with three locking groove along its central circumference array, it is provided with the lock ring to articulate on the locking groove, the connecting pin quilt the lock ring locking is in the locking inslot, the lock ring adopts the locking clamping piece locks the setting, adopt on the lock clamping piece screw location in the screw hole is in fixed wall top.
Further, as preferred, radiator unit includes that radiator fan, heat dissipation through-hole cover, heat dissipation branch pipe and heat dissipation are responsible for, radiator fan sets up in the seat shell, radiator fan's air outlet department is provided with the heat dissipation draft hood, radiator fan's air inlet end is connected the heat dissipation is responsible for, the heat dissipation is responsible for and is provided with a plurality of heat dissipation branch pipes in the array, the heat dissipation branch pipe orientation circuit control module sets up.
Further, as a preferable mode, the heat radiation device further comprises a dust-proof plate, and the heat radiation branch pipe penetrates through the dust-proof plate so as to be positioned on the dust-proof plate.
Compared with the prior art, the invention has the beneficial effects that:
the projector can be maintained and disassembled very conveniently, is installed very quickly and simply, has good heat dissipation effect of the heat dissipation assembly and uniform heat dissipation when in use, can well realize the damping effect by the elastic anti-seismic arc spring plate, and avoids the fatigue damage of rigid connection.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a projector for easy maintenance in a college English classroom according to the present invention;
FIG. 2 is a schematic structural view of an upper auxiliary fixing and connecting assembly of a projector for facilitating overhaul in a college English classroom;
FIG. 3 is a schematic structural view of a detachable lower connection assembly of a projector for easy maintenance in a college English classroom;
FIG. 4 is a schematic structural view of a projection lens angle adjusting assembly of the projector for easy maintenance in a college English classroom;
the device comprises a base shell, a lower cover plate, a circuit control module, a heat dissipation fan, a heat dissipation through hole cover, a heat dissipation branch pipe, a dust guard, a heat dissipation main pipe, a heat dissipation branch pipe, a dust guard, a heat dissipation main pipe, a projection lens angle adjusting assembly, a projection lens, a support adjusting column, a conveniently-disassembled lower connecting assembly, a support fixing column, an elastic shock-proof arc-shaped spring plate, a support pin, a support connecting assembly, a support fixing wall top, a support ring, a support adjusting assembly, a support adjusting column, An adjustment screw hole, 34, against the adjustment nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-4, the present invention provides a technical solution: a projector convenient for overhaul in a college English classroom is characterized by comprising a seat shell 1, a lower cover plate 2, a projection lens angle adjusting assembly 9, a conveniently-disassembled lower connecting assembly 12, an upper fixing column 13, an elastic anti-seismic arc-shaped spring plate 14 and an upper auxiliary fixing and connecting assembly, wherein a heat dissipation assembly is arranged in the seat shell 1, and the lower cover plate 2 is detachably arranged below the seat shell;
the upper end of the seat shell 1 is connected to the lower end of the upper fixing column 13 by the conveniently detachable lower connecting component 12;
the upper end of the upper fixing column 13 is fixed on the elastic shock-resistant arc-shaped spring plate 14, and the upper end surface of the elastic shock-resistant arc-shaped spring plate 14 is of a concave structure;
the upper end of the elastic shock-resistant arc-shaped spring plate 14 is fixed on a fixed wall top 17 by adopting three connecting pins, and the connecting pin 15 extends into and is fixed on the fixed wall top 17;
the three connecting pins 15 are connected together by the upper auxiliary fixed connecting assembly 16;
the seat shell is characterized in that a circuit control module 3 in a modular design is arranged in the seat shell 1, and a projection lens 10 is arranged on one side, opposite to the heat dissipation air outlet end of the heat dissipation assembly, of the seat shell 1 and can adjust the angle through a projection lens angle adjusting assembly.
In this embodiment, as shown in fig. 4, the projection lens angle adjusting assembly includes an abutting adjusting column 11, an outer enveloping hinge ring 30, an inner enveloping hinge ring 31, an elastic head 32, an adjusting screw hole 33, and an abutting adjusting nut 34, the inner enveloping hinge ring 31 is disposed in a housing body in the housing 1, the outer enveloping hinge ring 30 is integrally disposed on the projection lens 10, the inner enveloping hinge ring 31 extends into an area enclosed by the outer enveloping hinge ring 30, an end of the outer enveloping hinge ring 30 extends into a center of the inner enveloping hinge ring 31, an end of the outer enveloping hinge ring 30 is disposed with the elastic head 32, the elastic head 32 is sandwiched in a center of the inner enveloping hinge ring, an adjusting screw hole 33 is disposed at a lower end of the inner enveloping hinge ring on the housing body in the housing, the adjusting screw hole 33 is internally threaded and adjusted to be provided with the abutting adjusting column 11, the end of the abutting adjusting column 11 abuts against the side end face of the projection lens 10, and the abutting adjusting nut 34 is connected with the external thread of the abutting adjusting column 11.
In this embodiment, the elastic shock-resistant arc-shaped spring plate is made of a spring steel plate with a thin middle rear edge portion.
As shown in fig. 3, the detachable lower connecting assembly includes an upper axial positioning plate 22, an outer locking sleeve 23, a lower fixed seat 25, a lower axial positioning plate 26, an axial connecting ring one 28 and an axial connecting ring two 29, a plug is disposed at a lower end of the upper fixed column 13, an axial connecting groove is disposed on a lower circumference of the upper fixed column 13, the lower fixed seat 25 is fixedly disposed on the housing, a socket is disposed at an upper end of the lower fixed seat 25, the socket is connected with the plug in an inserting manner, an axial connecting groove is also disposed on a circumference of the lower fixed seat, after the socket is connected with the plug in an inserting manner, the axial connecting ring one 28 and the axial connecting ring two 29 are respectively fastened and connected to the axial connecting groove so as to axially connect the socket and the plug together, cross sections of the axial connecting ring one 28 and the axial connecting ring two 29 are both semi-circular structures, the outer locking sleeve 23 is coaxially sleeved outside after the axial connecting ring I and the axial connecting ring II are buckled, the upper end of the outer locking sleeve 23 is axially positioned and fixed at the upper end by adopting an upper axial positioning disc 22 positioned on the upper fixing column, and the lower end of the outer locking sleeve is axially positioned and fixed at the lower end by adopting a lower axial positioning disc 26 positioned on the lower fixing seat.
In the preferred embodiment, the outer locking sleeve is fixed on the first axial connecting ring or the second axial connecting ring by a plurality of locking bolts 24. The plug-in connection position of the socket and the plug is provided with a positioning clamp 27, the lower end of the upper fixing column is provided with a blind hole, the upper end of the lower fixing seat is also provided with a blind hole, and at least one central positioning column 21 extends into the blind hole of the upper fixing column and the blind hole of the lower fixing seat.
As shown in fig. 2, the upper auxiliary fixing and connecting assembly comprises a connecting body, a locking ring 18, a locking clamping piece 19 and a screw hole 20, wherein the connecting body is provided with three locking grooves along the central circumference array thereof, the locking ring 18 is hinged to the locking grooves, the locking ring is locked in the locking grooves, the locking ring 18 is locked by the locking ring 19, and the locking clamping piece 19 is provided with a screw which is positioned in the screw hole 20 and is positioned on the top of the fixed wall.
As shown in fig. 1, the heat dissipation assembly includes a heat dissipation fan 4, a heat dissipation through hole cover 5, a heat dissipation branch pipe 6 and a heat dissipation main pipe 8, the heat dissipation fan 4 is arranged in the seat shell, the air outlet of the heat dissipation fan 4 is provided with the heat dissipation ventilation cover 5, the air inlet end of the heat dissipation fan is connected with the heat dissipation main pipe 8, the heat dissipation main pipe 8 is provided with a plurality of heat dissipation branch pipes 6 in an array, and the heat dissipation branch pipes 6 face the circuit control module 3.
In order to ensure the dustproof effect, the dustproof device also comprises a dustproof plate 7, and the heat radiation branch pipe 6 penetrates through the dustproof plate 7 to be positioned on the dustproof plate.
The projector can be maintained and disassembled very conveniently, is installed very quickly and simply, has good heat dissipation effect of the heat dissipation assembly and uniform heat dissipation when in use, can well realize the damping effect by the elastic anti-seismic arc spring plate, and avoids the fatigue damage of rigid connection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A projector convenient for overhaul in a college English classroom is characterized by comprising a seat shell, a lower cover plate, a projection lens angle adjusting assembly, a conveniently-disassembled lower connecting assembly, an upper fixing column, an elastic anti-seismic arc spring plate and an upper auxiliary fixing and connecting assembly, wherein a heat dissipation assembly is arranged in the seat shell, and the lower cover plate is detachably arranged below the seat shell;
the upper end of the seat shell is connected to the lower end of the upper fixing column through the conveniently detachable lower connecting assembly;
the upper end of the upper fixing column is fixed on the elastic anti-seismic arc-shaped spring plate, and the upper end surface of the elastic anti-seismic arc-shaped spring plate is of a concave structure;
the upper end of the elastic shock-resistant arc-shaped spring plate is fixed on the top of a fixed wall by three connecting pins, and the connecting pins extend into and are fixed on the top of the fixed wall;
the three connecting pins are connected together by the upper auxiliary fixed connecting assembly;
a circuit control module in a modular design is arranged in the seat shell, and a projection lens is arranged on one side of the seat shell, which is opposite to the heat dissipation air outlet end of the heat dissipation assembly, and the angle of the projection lens is adjustable by adopting a projection lens angle adjusting assembly;
the projection lens angle adjusting assembly comprises a leaning adjusting column, an outer enveloping hinge ring, an inner enveloping hinge ring, an elastic head, an adjusting screw hole and a leaning adjusting nut, the inner enveloping hinge ring is arranged in a seat shell body in the seat shell, the outer enveloping hinge ring is integrally arranged on the projection lens, the inner enveloping hinge ring extends into an area enclosed by the outer enveloping hinge ring, the end part of the outer enveloping hinge ring extends into the center of the inner enveloping hinge ring, the end part of the outer enveloping hinge ring is provided with the elastic head, the elastic head is clamped in the center of the inner enveloping hinge ring, the adjusting screw hole is arranged at the lower end of the inner enveloping hinge ring on the seat shell body in the seat shell, the leaning adjusting column is arranged in the adjusting screw hole in an adjusting way, and the end part of the leaning adjusting column leans against the side end face of the projection lens, the external thread of the abutting adjusting column is connected with the abutting adjusting nut;
the elastic shock-resistant arc-shaped spring plate is made of a spring steel plate with a thick middle part and a thin side part;
go up supplementary fixed connection subassembly including connecting body, lock ring, locking clamping piece and screw hole, the connecting body is provided with three locking groove along its central circumference array, it is provided with the lock ring to articulate on the locking groove, the connecting pin quilt the lock ring locking is in the locking inslot, the lock ring adopts the locking clamping piece locks the setting, adopt on the lock clamping piece screw location in the screw hole is in fixed wall top.
2. The projector for facilitating overhaul of a college english classroom according to claim 1, wherein: the conveniently-disassembled lower connecting assembly comprises an upper axial positioning disc, an outer locking sleeve, a lower fixing seat, a lower axial positioning disc, an axial connecting ring I and an axial connecting ring II, a plug is arranged at the lower end of an upper fixing column, an axial connecting groove is formed in the circumference of the lower side of the upper fixing column, the lower fixing seat is fixedly arranged on a seat shell, a socket is arranged at the upper end of the lower fixing seat and is connected with the plug in an inserting mode, an axial connecting groove is also formed in the circumference of the lower fixing seat, after the socket is connected with the plug in an inserting mode, the axial connecting ring I and the axial connecting ring II are respectively buckled and connected to the axial connecting groove so as to enable the socket to be connected with the plug in the axial direction, the cross sections of the axial connecting ring I and the axial connecting ring II are both of a semicircular structure, and the outer locking sleeve is coaxially sleeved outside after the axial, the upper end of the outer locking sleeve is positioned on the upper fixing column through an upper axial positioning disc for upper end axial positioning and fixing, and the lower end of the outer locking sleeve is positioned on the lower fixing seat through a lower axial positioning disc for lower end axial positioning and fixing.
3. The projector for facilitating overhaul of a college english classroom according to claim 2, wherein: the outer locking sleeve is fixedly positioned on the axial connecting ring I or the axial connecting ring II by adopting a plurality of locking bolts.
4. The projector for facilitating overhaul of a college english classroom according to claim 2, wherein: the socket is provided with the plug, the lower extreme of last fixed column is provided with the blind hole, the upper end of lower fixing base also is provided with the blind hole, at least one central reference column stretches into in the blind hole of last fixed column and the blind hole of lower fixing base.
5. The projector for facilitating overhaul of a college english classroom according to claim 1, wherein: the heat dissipation assembly comprises a heat dissipation fan, a heat dissipation through hole cover, a heat dissipation branch pipe and a heat dissipation main pipe, wherein the heat dissipation fan is arranged in the seat shell, a heat dissipation ventilating cover is arranged at an air outlet of the heat dissipation fan, an air inlet end of the heat dissipation fan is connected with the heat dissipation main pipe, a plurality of heat dissipation branch pipes are arranged on the heat dissipation main pipe in an array mode, and the heat dissipation branch pipes face towards the circuit control module.
6. The projector for facilitating overhaul of a college english classroom according to claim 5, wherein: the heat dissipation device further comprises a dust guard plate, and the heat dissipation branch pipe penetrates through the dust guard plate so as to be positioned on the dust guard plate.
CN201910025854.8A 2019-01-09 2019-01-09 Projecting apparatus of college english classroom easy access Active CN109581790B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910025854.8A CN109581790B (en) 2019-01-09 2019-01-09 Projecting apparatus of college english classroom easy access

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Application Number Priority Date Filing Date Title
CN201910025854.8A CN109581790B (en) 2019-01-09 2019-01-09 Projecting apparatus of college english classroom easy access

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CN109581790B true CN109581790B (en) 2020-10-30

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JP2000171897A (en) * 1998-12-04 2000-06-23 Toshiba Corp Liquid crystal projector
JP2007155975A (en) * 2005-12-02 2007-06-21 Matsushita Electric Ind Co Ltd Rear projection apparatus
CN106383398A (en) * 2015-08-04 2017-02-08 江苏宜清光电科技有限公司 Lens capable of carrying out 360 degree projection
CN205588920U (en) * 2016-04-29 2016-09-21 王丽萍 Building engineering car supports chassis
CN205859545U (en) * 2016-07-31 2017-01-04 唐山师范学院 Scialyscope protection hanging is cased
CN106019786A (en) * 2016-08-08 2016-10-12 成都恒胜达科技有限公司 Projector shell with dust prevention and heat dissipation functions
CN206112446U (en) * 2016-10-25 2017-04-19 胡欣 Dual -purpose type construction machinery auxiliary stay vibration damper
CN106896630A (en) * 2017-04-25 2017-06-27 安徽庆睿实业有限责任公司 A kind of intelligent multimedia projecting apparatus
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