阅读说明：本技术 一种智能窗户及其控制方法 (Intelligent window and control method thereof ) 是由 陈孚江 孙启航 谢韵 洪洋 董志蒙 赵新宇 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种智能窗户及其控制方法,包括外框架、第一窗扇、第二窗扇、驱动组件和控制模块；所述第一窗扇的上窗档两端分别铰接在所述外框架上；所述第二窗扇的上窗档与所述第一窗扇的下窗档铰接,所述第二窗扇的下窗档的两端延伸到所述外框架中,并可沿所述外框架上下运动；所述驱动组件用于带动所述第二窗扇的下窗档沿着沿所述外框架上下运动；所述控制模块用于控制所述驱动组件。本发明通过控制模块控制驱动组件带动第二窗扇下窗档沿着外框架上下运动,进而执行开关窗,可远程操作,自动开关,操作方便,无安全隐患。(The invention discloses an intelligent window and a control method thereof, wherein the intelligent window comprises an outer frame, a first window sash, a second window sash, a driving assembly and a control module; two ends of an upper window stop of the first window sash are respectively hinged on the outer frame; the upper window stop of the second sash is hinged with the lower window stop of the first sash, and two ends of the lower window stop of the second sash extend into the outer frame and can move up and down along the outer frame; the driving assembly is used for driving the lower window stop of the second window sash to move up and down along the outer frame; the control module is used for controlling the driving assembly. The control module controls the driving assembly to drive the second sash lower window stop to move up and down along the outer frame so as to open and close the window, and the window opening and closing device can be operated remotely and automatically, is convenient to operate and has no potential safety hazard.)

1. The intelligent window is characterized by comprising an outer frame, a first window sash, a second window sash, a driving assembly and a control module;

two ends of an upper window stop of the first sash are respectively hinged to the upper section or the top of the outer frame;

the upper window stop of the second sash is hinged with the lower window stop of the first sash, and two ends of the lower window stop of the second sash extend into the outer frame and can move up and down along the outer frame;

the driving assembly is used for driving the lower window stop of the second window sash to move up and down along the outer frame;

the control module is used for controlling the driving assembly.

2. A smart window as claimed in claim 1, further comprising a spring-loaded roller screen comprising a first roller and a screen resiliently pulled from the first roller;

the first winding drum is fixed at the bottom of the outer frame;

the pulling-out part of the screen curtain can move up and down along the outer frame, and the pulling-out part of the screen curtain is connected with the lower window stop of the second window sash through a connecting piece.

3. The smart window according to claim 1 or 2, wherein the smart window further comprises a sunshade protection component, the sunshade protection component comprises a second winding drum and a protection curtain movably stored in the second winding drum;

the second winding drum is fixed at the top of the outer frame;

the protective curtain can move up and down along the outer frame.

4. A smart window according to claim 3, wherein the drive assembly comprises a drive motor, a first drive wheel, a drive belt or chain, a lead screw, a nut and a second drive wheel;

the upper end of the screw rod is rotatably connected to the top of the outer frame, and the lower end of the screw rod is rotatably connected to the bottom of the outer frame;

the nut is in threaded connection with the screw rod;

the driving motor is fixed to the top of the outer frame, the first driving wheel is fixed to an output shaft of the driving motor, the second driving wheel is fixed to the screw rod, and the first driving wheel and the second driving wheel are in chain transmission connection through the transmission belt or the transmission chain.

5. A smart window according to claim 4, further comprising a photovoltaic power generation module comprising a photovoltaic panel and a battery electrically connected to each other;

the photovoltaic panel and the storage battery are respectively fixed to the top of the outer frame.

6. A smart window as claimed in claim 5, wherein the outer frame comprises a top beam, a bottom beam and two side pillars, the top beam, the bottom beam and the two side pillars being fixed to each other in a rectangular frame shape.

7. A smart window as claimed in claim 6 wherein the side pillars comprise a longitudinal panel having two first, two second and three beads disposed in sequence on an inner surface thereof;

the two first protruding strips form a second guide rail, and the drawn-out part of the screen curtain can move up and down along the second guide rail;

the two protruding strips form a first guide rail, and two ends of a lower window stop of the second sash can move up and down along the first guide rail;

the two convex strips III form a third guide rail, and the protective curtain can move up and down along the third guide rail;

an adapter plate is installed on the second protruding strip, a shaft hole is formed in the adapter plate, and shafts matched with the shaft hole are arranged at two ends of an upper window stop of the first window sash.

8. A smart window as claimed in claim 6 or 7 wherein said top beam comprises first, second and third profiles connected end to end in sequence;

the first section comprises a first bottom plate, a first vertical plate and a second vertical plate, wherein the first vertical plate and the second vertical plate extend upwards from the first bottom plate, the first vertical plate, the second vertical plate and the first bottom plate jointly enclose a first mounting groove with an opening, the second vertical plate and an upwards bent section of the first bottom plate form a second mounting groove, and the bottom of the second mounting groove is provided with a long hole;

the second section bar comprises a second bottom plate and a third vertical plate extending upwards from one end of the second bottom plate, and the second bottom plate seals an opening of the first mounting groove;

the third section comprises a horizontal section, an inclined lower section and a downward bending section, one end of the horizontal section is fixedly connected to one end of the third vertical plate, and one end of the downward bending section is fixedly connected with the upward bending section of the first bottom plate;

the driving motor is fixed on the second bottom plate, a first shaft seat is fixed in the first mounting groove, an output shaft of the driving motor penetrates through the second bottom plate and extends downwards into the first shaft seat, and the first driving wheel is located in the first mounting groove;

a second shaft seat matched with the screw rod is arranged on the second base plate, the upper end of the screw rod penetrates through the second base plate and is installed in the second shaft seat, and the second driving wheel is located in the first installation groove;

the second winding drum is fixed in the second mounting groove, and the protective curtain can penetrate out of the long hole downwards into the third guide rail;

the photovoltaic panel is fixed on the outer surface of the inclined lower section, and the storage battery is fixed on the second bottom plate.

9. The smart window of claim 1, wherein the control module comprises a single chip microcomputer, a network communication module, a mobile terminal, a temperature sensor and a humidity sensor;

the single chip microcomputer is connected with the mobile terminal through the network communication module;

the single chip microcomputer is used for controlling the driving assembly;

the mobile terminal is connected with a weather forecast APP server through the network communication module and acquires weather data;

the temperature sensor is used for collecting indoor temperature and sending the indoor temperature to the single chip microcomputer;

the humidity sensor is used for collecting indoor humidity and sending the indoor humidity to the single chip microcomputer;

based on the data of the weather forecast APP server, the temperature sensor and the humidity sensor, the single chip microcomputer makes a control command.

10. A smart window control method, using the smart window of claim 9, the method comprising:

controlling a mobile terminal to preset a plurality of working modes, wherein the optimal temperature range, the optimal humidity range and the priority set in each working mode are different; selecting one of the working modes as a default working mode and sending the default working mode to the singlechip;

controlling the temperature sensor and the humidity sensor to send indoor temperature data and indoor humidity data to the single chip microcomputer;

controlling the mobile terminal to receive weather forecast data of the weather forecast APP server at regular time and sending the weather forecast data to the single chip microcomputer in time;

the control single chip microcomputer obtains a control instruction by comparing and calculating weather prediction data, indoor temperature data, indoor humidity data and a working mode at regular time and sends the control instruction to the driving assembly.

Technical Field

The invention relates to the technical field of windows, in particular to an intelligent window and a control method thereof.

Background

The existing windows are manually opened and closed. The host can not operate when going out; on the other hand, the positions of some windows are high, manual operation needs to climb up a windowsill, operation is inconvenient, and potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a remote-operated and automatically-opened and closed intelligent window and a control method thereof.

The invention adopts the following technical scheme for realizing the aim of the invention:

the invention provides an intelligent window which comprises an outer frame, a first sash, a second sash, a driving assembly and a control module, wherein the first sash is arranged on the outer frame;

two ends of an upper window stop of the first sash are respectively hinged to the upper section or the top of the outer frame;

the upper window stop of the second sash is hinged with the lower window stop of the first sash, and two ends of the lower window stop of the second sash extend into the outer frame and can move up and down along the outer frame;

the driving assembly is used for driving the lower window stop of the second window sash to move up and down along the outer frame;

the control module is used for controlling the driving assembly.

Further, the smart window further comprises a spring rolling screen window, wherein the spring rolling screen window comprises a first winding drum and a screen curtain elastically pulled out of the first winding drum;

the first winding drum is fixed at the bottom of the outer frame;

the pulling-out part of the screen curtain can move up and down along the outer frame, and the pulling-out part of the screen curtain is connected with the lower window stop of the second window sash through a connecting piece.

Furthermore, the intelligent window further comprises a sun-shading protection assembly, wherein the sun-shading protection assembly comprises a second winding drum and a protection curtain movably collected in the second winding drum;

the second winding drum is fixed at the top of the outer frame;

the protective curtain can move up and down along the outer frame.

Furthermore, the driving assembly comprises a driving motor, a first driving wheel, a transmission belt or a transmission chain, a screw rod, a nut and a second driving wheel;

the upper end of the screw rod is rotatably connected to the top of the outer frame, and the lower end of the screw rod is rotatably connected to the bottom of the outer frame;

the nut is in threaded connection with the screw rod;

the driving motor is fixed to the top of the outer frame, the first driving wheel is fixed to an output shaft of the driving motor, the second driving wheel is fixed to the screw rod, and the first driving wheel and the second driving wheel are in chain transmission connection through the transmission belt or the transmission chain.

Further, the intelligent window further comprises a photovoltaic power generation module, wherein the photovoltaic power generation module comprises a photovoltaic panel and a storage battery which are electrically connected with each other;

the photovoltaic panel and the storage battery are respectively fixed to the top of the outer frame.

Furthermore, the outer frame comprises a top cross beam, a bottom cross beam and two side upright columns, wherein the top cross beam, the bottom cross beam and the two side upright columns are fixed with each other to form a rectangular frame.

Furthermore, the side upright post comprises a longitudinal plate, and two first protruding strips, two second protruding strips and two third protruding strips are sequentially arranged on the inner surface of the longitudinal plate;

the two first protruding strips form a second guide rail, and the drawn-out part of the screen curtain can move up and down along the second guide rail;

the two protruding strips form a first guide rail, and two ends of a lower window stop of the second sash can move up and down along the first guide rail;

the two convex strips III form a third guide rail, and the protective curtain can move up and down along the third guide rail;

a notch is formed in the upper end of the second protruding strip, an adapter plate is installed in the notch, a shaft hole is formed in the adapter plate, and shafts matched with the shaft hole are arranged at the two ends of the upper window stop of the first window sash.

Further, the top cross beam comprises a first section bar, a second section bar and a third section bar which are sequentially connected end to end;

the first section bar comprises a first bottom plate, a first vertical plate and a second vertical plate, wherein the first vertical plate and the second vertical plate extend upwards from the first bottom plate, the first vertical plate, the second vertical plate and the first bottom plate jointly enclose a first mounting groove with an opening, the second vertical plate and an upwards bent section of the first bottom plate form a second mounting groove, the bottom of the second mounting groove is provided with a long hole, and the position of the long hole is opposite to the third guide rail;

the second section bar comprises a second bottom plate and a third vertical plate extending upwards from one end of the second bottom plate, and the second bottom plate seals an opening of the first mounting groove;

the third section comprises a horizontal section, an inclined lower section and a downward bending section, one end of the horizontal section is fixedly connected to one end of the third vertical plate, and one end of the downward bending section is fixedly connected with the upward bending section of the first bottom plate;

the driving motor is fixed on the second bottom plate, a first shaft seat is fixed in the first mounting groove, an output shaft of the driving motor penetrates through the second bottom plate and extends downwards into the first shaft seat, and the first driving wheel is located in the first mounting groove;

a second shaft seat matched with the screw rod is arranged on the second base plate, the upper end of the screw rod penetrates through the second base plate and is installed in the second shaft seat, and the second driving wheel is located in the first installation groove;

the second winding drum is fixed in the second mounting groove, and the protective curtain penetrates out of the long hole downwards into the third guide rail;

the photovoltaic panel is fixed on the outer surface of the inclined lower section, and the storage battery is fixed on the second bottom plate.

Further, the control module comprises a single chip microcomputer, a network communication module, a mobile terminal, a temperature sensor and a humidity sensor;

the single chip microcomputer is connected with the mobile terminal through the network communication module;

the single chip microcomputer is used for controlling the driving assembly;

the mobile terminal is connected with a weather forecast APP server through the network communication module and acquires weather data;

the temperature sensor is used for collecting indoor temperature and sending the indoor temperature to the single chip microcomputer;

the humidity sensor is used for collecting indoor humidity and sending the indoor humidity to the single chip microcomputer;

based on the data of the weather forecast APP server, the temperature sensor and the humidity sensor, the single chip microcomputer makes a control command.

The invention provides an intelligent window control method, which adopts the intelligent window and comprises the following steps:

controlling a mobile terminal to preset a plurality of working modes, wherein the optimal temperature range, the optimal humidity range and the priority set in each working mode are different;

selecting one of the working modes as a default working mode and sending the default working mode to the singlechip;

controlling the temperature sensor and the humidity sensor to send indoor temperature data and indoor humidity data to the single chip microcomputer;

controlling the mobile terminal to receive weather forecast data of the weather forecast APP server at regular time and sending the weather forecast data to the single chip microcomputer in time;

the control single chip microcomputer obtains a control instruction by comparing and calculating weather prediction data, indoor temperature data, indoor humidity data and a working mode at regular time and sends the control instruction to the driving assembly.

The invention has the following beneficial effects:

the control module controls the driving assembly to drive the second sash lower window stop to move up and down along the outer frame so as to open and close the window, and the window opening and closing device can be operated remotely and automatically, is convenient to operate and has no potential safety hazard.

Drawings

Fig. 1 is a side sectional view of a smart window according to an embodiment of the present invention;

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

fig. 3 is a schematic cross-sectional view illustrating a top cross beam of an outer frame in a smart window according to an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 1 at B;

FIG. 5 is an enlarged partial schematic view of FIG. 1 at C;

fig. 6 is a front cross-sectional view of a smart window according to an embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of FIG. 6 at D;

FIG. 8 is an enlarged partial schematic view of FIG. 6 at E;

fig. 9 is a schematic cross-sectional view illustrating a side pillar of an outer frame of a smart window according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a transfer plate in a smart window according to an embodiment of the present invention;

fig. 11 is a schematic block diagram of a smart window control method according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 11, the present embodiment discloses a smart window, which includes an outer frame, a first sash 2, a second sash 3, a driving assembly, and a control module;

the outer frame comprises a top cross beam 11, a bottom cross beam 12 and two side upright columns 13, wherein the top cross beam 11, the bottom cross beam 12 and the two side upright columns 13 are mutually fixed to form a rectangular frame; a first guide rail is arranged on the inner surface of the side upright column 13; the first sash 2 is rectangular, and two ends of an upper window stop of the first sash 2 are respectively hinged with the upper ends of the two side upright posts 13; the upper window stop of the second sash 3 is hinged with the lower window stop of the first sash 2; two ends of the lower window stop of the second window sash 3 extend into the first guide rail in a matched mode and slide up and down along the first guide rail; the driving assembly is used for driving the lower window stop of the second window sash 3 to move up and down along the first guide rail; the control module is used for controlling the driving component through network connection according to weather forecast data on the mobile terminal 54 and/or instructions input by the user 57. A user sends a control instruction and weather data through the mobile terminal 54, and then controls the driving assembly to drive the lower window stop of the second window sash 3 to move up and down along the guide rail I, so that the window opening and closing are executed, and the mobile terminal is connected with the control module through a network, so that the remote operation is facilitated; the whole structure is simple and reasonable, and the use is convenient.

The spring rolling screen window comprises a first winding drum 61 and a screen 62 which is elastically pulled out of the first winding drum 61; the first winding drum 61 is fixed in the bottom cross beam 12 of the outer frame; the inner surface of the side upright post 13 is provided with a second guide rail matched with the screen 62; the drawn-out portion of the screen 62 moves up and down along the second guide rail, and the drawn-out portion of the screen 62 is connected with the lower rail of the second sash 3 by a rubber tape 63 (i.e., a connector). The screen of the spring rolling screen window is directly driven by the second window sash 3, when the window is opened, the lower window stop of the second window sash 3 rises to just directly pull the screen 62, so that mosquitoes are prevented from flying into the screen, the whole structure is simple and reasonable, and the motor required by the screen 62 is saved.

The sun-shading protection device further comprises a sun-shading protection component, wherein the sun-shading protection component comprises a second winding drum 71 and a protection curtain 72 which is electrically collected in the second winding drum 71; the second winding drum 71 is fixed in the top cross beam 11 of the outer frame; and a third guide rail matched with the protective curtain 72 is arranged on the inner surface of the outer frame side upright 13. The whole structure is simple and reasonable.

The driving assembly comprises a driving motor 41, a first driving wheel 42, a driving belt 43, a screw rod 44, a nut 45 and a second driving wheel 46; the upper end of the screw rod 44 is rotatably connected in the top cross beam 11, and the lower end of the screw rod 44 is rotatably connected in the bottom cross beam 12; the nut 45 is in threaded connection with the screw rod 44, and the nut 45 is fittingly and slidably mounted in the first guide rail; the driving motor 41 is fixed in the top cross beam 11; the first transmission wheel 42 is fixed on an output shaft of the driving motor 41, the second transmission wheel 46 is fixed on the screw rod 44, and the first transmission wheel 42 and the second transmission wheel 46 are in transmission connection through the transmission belt 43; the first transmission wheel 42, the transmission belt 43, the screw 44, the nut 45 and the second transmission wheel 46 respectively comprise two. Only one driving motor 41 is needed to drive the two screw rods 44 simultaneously, and the structure is simple and reasonable.

Further comprising a photovoltaic power generation module comprising a photovoltaic panel 81 and a storage battery 82 electrically connected to each other; the photovoltaic panel 81 is fixed on the outer surface of the top beam 11, and the storage battery 82 is fixed inside the top beam 11. The problems of inconvenient installation and small application range caused by the need of connecting a power supply are avoided.

The top cross beam 11 is formed by fixing a first section bar 111, a second section bar 112 and a third section bar 113; the first section 111 comprises a first bottom plate 1111 and a first vertical plate 1112 and a second vertical plate 1113 which extend upwards from the upper surface of the first bottom plate 1111, and the first vertical plate 1112 and the second vertical plate 1113 are parallel; the first bottom plate 1111 sequentially comprises a horizontal plate and an upward bending section from back to front, the first vertical plate 1112 is positioned at the back end of the horizontal plate of the first bottom plate 1111, the second vertical plate 1113 is positioned in the middle of the horizontal plate of the first bottom plate 1111, and the horizontal plate of the first bottom plate 1111, the first vertical plate 1112 and the second vertical plate 1113 form a first mounting groove; the horizontal plate of the first bottom plate 1111, the vertical plate II 1113 and the upward bending section of the first bottom plate 1111 form a second mounting groove; a long hole 1114 is formed in the bottom of the mounting groove II, and the position of the long hole 1114 is matched with the guide rail III; the second section 112 comprises a second bottom plate 1121 and a third vertical plate 1122, wherein the second bottom plate 1121 and the third vertical plate 1122 integrally extend upwards from the rear end of the second bottom plate 1121, and the front end and the rear end of the second bottom plate 1121 are respectively fixed to the upper ends of the second vertical plate 1113 and the first vertical plate 1112; the third section 113 sequentially comprises a horizontal section 1131, an inclined downward section 1132 and a downward bent section 1133 from back to front; the rear end of the horizontal section 1131 of the section bar three 113 is fixed at the upper end of the vertical plate three 1122, and the front end of the downward bent section 1133 of the section bar three 113 is fixed with the front end of the upward bent section of the bottom plate one 1111; the driving motor 41 is fixed on the upper surface of the second bottom plate 1121, the first shaft seat 1115 is fixed on the upper surface of the first bottom plate 1111, and the output shaft of the driving motor 41 penetrates through the second bottom plate 1121 and extends downwards into the first shaft seat 1115 of the first bottom plate 1111; the first driving wheel 42 is positioned in the first mounting groove and is positioned between the first bottom plate 1111 and the second bottom plate 1121; a second shaft seat 1123 matched with the screw rod 44 is arranged on the second bottom plate 1121, the upper end of the screw rod 44 penetrates through the first bottom plate 1111 and is installed in the second shaft seat 1123 in a matched manner, the second transmission wheel 46 is positioned in the first installation groove, and the second transmission wheel 46 is positioned between the first bottom plate 1111 and the second bottom plate 1121; the second winding drum 71 of the sunshade protection component is fixed in the second mounting groove, and the protective curtain 72 penetrates out of the long hole 1114 downwards into the third guide rail; the photovoltaic panel 81 is fixed on the upper surface of the inclined downward section 1132 of the third section bar 113, and the storage battery 82 is fixed on the upper surface of the second bottom plate 1121; the output shaft of the driving motor 41 is in plug connection with the body of the driving motor 41. The integral design of the top cross beam 11 is simple and reasonable, during installation, the output shaft of the driving motor 41, the first driving wheel 42, the transmission belt 43, the screw rod 44, the nut 45 and the second driving wheel 46 are firstly installed on the first section bar 111, then the second section bar 112 is installed, then the driving motor 41 body and the storage battery 82 are installed on the second section bar 112, then the photovoltaic panel 81 is installed on the third section bar 113 and is connected with a circuit between the storage battery 82 and the photovoltaic panel 81, then the third section bar 113 and the second section bar 112 are fixed, installation is convenient, and the integral structure is simple and reasonable.

The control module comprises a display 51, a square hole is formed in a vertical plate three 1122 of the second section bar 112, and the display 51 is fixed in the square hole. Because the vertical plate three 1122 of the second section bar 112 is arranged on the rear end face, namely indoors, the control situation is convenient for a user to watch.

The side upright column 13 comprises a longitudinal plate 131, two first protruding strips 132, two second protruding strips 133 and two third protruding strips 134 are protruded on the inner surface of the longitudinal plate 131 in sequence, the two first protruding strips 132 form the second guide rail, the two second protruding strips 133 form the first guide rail, and the two third protruding strips 134 form the third guide rail; the upper end of the second protruding strip 133 is provided with a rectangular notch 1331, an adapter plate 135 is installed in the rectangular notch 1331, the adapter plate 135 is provided with a shaft hole 1351, two ends of the upper window stop of the first sash 2 are provided with shafts matched with the shaft hole 1351, and the shafts at two ends of the upper window stop of the first sash 2 are installed in the shaft hole 1351. The whole structure is simple and reasonable.

The control module comprises a singlechip 52, a network communication module 53, a mobile terminal 54, a temperature sensor 55 and a humidity sensor 56; the single chip microcomputer 52 is connected with the mobile terminal 54 through a network communication module 53, and the single chip microcomputer 52 is used for controlling the driving component; the mobile terminal 54 is connected with a weather forecast APP server 58 through a network communication module 53 and acquires weather data; the temperature sensor 55 is used for collecting indoor temperature and sending the indoor temperature to the single chip microcomputer 52; the humidity sensor 56 is used for collecting indoor humidity and sending the indoor humidity to the single chip microcomputer 52. The singlechip 52 makes a control command by combining the data of the weather forecast APP server 58, the temperature sensor 55 and the humidity sensor 56, so that the program for manually judging whether the window needs to be opened or closed is reduced, the intelligent control is conveniently realized,

the control method specifically comprises the following steps:

s1 the user 57 uses the mobile terminal 54 to preset a plurality of working modes, wherein the optimum temperature range, the optimum humidity range and the priority set in each working mode are different; one of the working modes is selected as a default working mode and is sent to the singlechip 52;

s2, the temperature sensor 55 and the humidity sensor 56 send indoor temperature data and indoor humidity data to the singlechip 52; the mobile terminal 54 receives the weather forecast data to the weather forecast APP server 58 at regular time and sends the weather forecast data to the single chip microcomputer 52 in time;

the S3 single chip 52 compares the weather forecast data, the indoor temperature data, the indoor humidity data and the working mode to obtain a control instruction at regular time, and sends the control instruction to the driving component. The control method has the beneficial effects that: the user only needs to preset a working mode, and the intelligent window can work all the time according to the working mode; the control is simple.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.