CN210747954U

CN210747954U - Warm tea table of multi-functional intelligent electricity

Info

Publication number: CN210747954U
Application number: CN201921226471.9U
Authority: CN
Inventors: 田维仲
Original assignee: Zhongshan Luwang Electric Furnance Manufacturing Co ltd
Current assignee: Zhongshan Luwang Intelligent Technology Co.,Ltd.
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-16
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a multifunctional intelligent electric heating tea table, which comprises a panel and a base, wherein a supporting upright post is arranged between the panel and the base, a heating device, a heat dissipation device, a wireless communication device and a control device are also arranged between the panel and the base, a lifting device is arranged inside the supporting upright post, and the heating device, the heat dissipation device, the wireless communication device and the lifting device are all electrically connected with the control device; controlling means passes through control elevating gear, realize the change of tea table height, the device that generates heat adopts the physical principle heat that hot-air nature rises, combine heat abstractor to produce the produced heat of forced convection acceleratedly giving off the device that generates heat, reach quick heating, make the temperature in whole room promote fast, bring better experience for the user, furthermore, user's accessible wireless communication device realizes the communication of smart machine with warm tea table of electricity, realize remote control and data interaction, effectively promote the practicality of product, make the product have better market competition.

Description

Warm tea table of multi-functional intelligent electricity

Technical Field

The utility model relates to a household appliance, in particular to a multifunctional intelligent electric heating tea table.

Background

The function of current warm tea table of electricity is comparatively single, and the practicality is lower, and the device that generates heat of these warm tea tables of electricity all installs on the support post, or hangs at the panel back, all is radiant heating element, is limited to near the heating element heating (indoor air flow is slower, leads to most heat to be only around the device that generates heat, hardly gives off all around, or the heat gives off speed very slow), can't promote indoor space ambient temperature, it is relatively poor to get warm the effect.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a multifunctional intelligent electric heating tea table which can effectively improve the indoor overall space environment temperature.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a warm tea table of multi-functional intelligent electricity, includes panel and base, be provided with the support post between panel and the base, still be provided with device, heat abstractor, wireless communication device and the controlling means that generates heat between panel and the base, the inside of support post is provided with elevating gear, device, heat abstractor, wireless communication device and elevating gear all with the controlling means electricity is connected.

The heat dissipation device comprises a support and a fan assembly, the base comprises a lower cover body and an upper cover body matched with the lower cover body, an accommodating cavity is formed between the upper cover body and the lower cover body, the support is fixedly installed in the accommodating cavity, and the fan assembly is fixedly installed on the support.

An opening is formed in the surface of the upper cover body, and the heating device is arranged at the opening.

The lifting device comprises a nut piece fixed with the inner wall of the hollow cylinder, a screw rod matched with a screw hole of the nut piece and a speed reducer driving the screw rod to rotate circumferentially; the reduction gear sets up in each support post's inside, is provided with the transmission shaft among three adjacent reduction gears of group wherein, the reduction gear includes casing, first bevel gear and second bevel gear, first bevel gear passes through the bearing and vertically installs in the casing, the second bevel gear passes through bearing horizontal installation in the casing, first bevel gear meshes with the second bevel gear mutually, and the axis of two bevel gears is mutually perpendicular, the lead screw pass through the bearing with first bevel gear fixed connection, the both ends of transmission shaft respectively with the second bevel gear fixed connection in two adjacent reduction gears, arbitrary one the transmission shaft on be provided with double-shaft motor, two output shafts of double-shaft motor respectively through the shaft coupling with the transmission shaft is connected.

The control device is provided with a lifting device driving circuit, and the lifting device driving circuit comprises a main control chip U1, a power converter U2, a photoelectric coupler U3, an inductor L2, an inductor L3, a diode D2, a diode D3, a triode Q2, a PMOS (P-channel metal oxide semiconductor) tube P2, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6; the anode of the diode D2 is connected with a VCC power supply, and the cathode of the diode D2 is connected with the pin 1 of the power converter U2; the capacitor C5 is connected in parallel with the capacitor C3, one end of the capacitor C5 is connected with a node between the cathode of the diode D2 and the pin 1 of the power converter U2, and the other end of the capacitor C5 is grounded; the 3 pins of the power converter U2 are divided into two paths, one path is grounded through the capacitor C6, and the other path is connected with the 1 pin of the photoelectric coupler U3; pins 5-8 of the power converter U2 are all grounded; the anode of the diode D3 is grounded, the cathode is divided into two paths, one path is connected with the 2 pins of the power converter U2, and the other path is connected with the node of the capacitor C6 and the 3 pins of the power converter U2 through the inductor L2; the pin 2 of the photoelectric coupler U3 is connected with the pin 28 of the main control chip U1; the pin 3 of the photoelectric coupler U3 is connected with the pin 1 of the triode Q2 through the resistor R5; the 4 pin of the photoelectric coupler U3 is connected with the 2 pin of the PMOS pipe P2 through the resistor R6; the 1 pin of the PMOS tube P2 is divided into two paths, one path is connected with the node of the resistor R6 and the 2 pin of the PMOS tube P2 through the resistor R7, and the other path is connected with the 3 pin of the triode Q2; the pin 2 of the triode Q2 is grounded; the 3 pins of the PMOS pipe P2 are divided into two paths through the inductor L3, and one path is grounded through the capacitor C4; the other path is connected with the input end of the double-shaft motor.

An anti-scald component is arranged right above the heating device.

Still be provided with between panel and the base and put the thing board, put the four corners of thing board and install the arc linking arm, it passes through to put the thing board the arc linking arm is installed between panel and the base.

The surface of the supporting upright post is provided with a display screen, and the display screen is electrically connected with the control device.

The base is provided with supply socket, USB interface and the control button that charges, the control button with controlling means electricity is connected.

The utility model has the advantages that: the utility model discloses accessible controlling means controls elevating gear, realize the change of tea table height, the device that generates heat adopts the physical principle heat that hot-air nature rises, combine heat abstractor to produce the produced heat of forced convection distributing the device that generates heat with higher speed, reach quick heating, make the temperature in whole room promote fast, bring better experience for the user, furthermore, user's accessible wireless communication device realizes the communication connection of smart machine and warm tea table of electricity, realize remote control and data interaction, effectively promote the practicality of product, make the product have better market competition.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an exploded view of a portion of the structure of the present invention;

fig. 3 is an exploded view of the base of the present invention;

fig. 4 is a schematic view of a connection structure between two transmission shafts according to the present invention;

fig. 5 is an exploded view of the heat dissipating device of the present invention;

fig. 6 is an exploded view of the heating device of the present invention;

fig. 7 is a schematic block circuit diagram of the present invention;

fig. 8 is a schematic diagram of a driving circuit of the lifting device of the present invention.

Detailed Description

Referring to fig. 1 to 8, a multifunctional intelligent electric heating tea table comprises a panel 1 and a base 2, wherein a support upright post 3 is arranged between the panel 1 and the base 2, a heating device 4, a heat dissipation device 5, a wireless communication device 6 and a control device 7 are further arranged between the panel 1 and the base 2, a lifting device 8 is arranged inside the support upright post 3, and the heating device 4, the heat dissipation device 5, the wireless communication device 6 and the lifting device 8 are all electrically connected with the control device 7; in this embodiment, a first temperature sensor 29 and a second temperature sensor 30 are disposed between the panel 1 and the base 2, the first temperature sensor 29 and the second temperature sensor 30 are both electrically connected to the control device 7, wherein the first temperature sensor 29 is used for detecting an indoor environment temperature, the second temperature sensor 30 is used for detecting a temperature of an internal space formed by the tea table and the tablecloth when the tea table is surrounded by the tablecloth for warming, and the control device 7 performs automatic constant-temperature variable-frequency control on the heating device 4 by acquiring temperature information acquired by the first temperature sensor 29 and the second temperature sensor 30 in real time, so that loss of electric energy can be effectively saved; in the embodiment, the panel 1 adopts the embossed scratch-resistant technical glass, so that the pattern displayed on the glass can be more three-dimensional, the concentrated spatial depth and the strong visual impact feeling are formed, and the taste and the grade of the product are effectively improved; the base 2 is integrally formed by stretching stainless steel, so that the requirement of the heating device 4 on the ground clearance can be effectively improved; the wireless communication device 6 is a WiFi communication module, and a user can realize the communication between intelligent equipment and the electric heating tea table through the wireless communication device, so that remote control and data interaction are realized; the heat dissipation device 5 comprises a support 9 and a fan assembly 10, in this embodiment, the fan assembly 10 is composed of a fan housing and a forced convection perfusion fan installed in the fan housing, the fan assembly 10 is preferentially installed near the heating device 3 and is preferentially installed near the heating device 4, the base 2 comprises a lower cover body 11 and an upper cover body 12 matched with the lower cover body 11, an accommodating cavity is formed between the upper cover body 12 and the lower cover body 11, the support 9 is fixedly installed in the accommodating cavity, and the fan assembly 10 is fixedly installed on the support 9; further, an opening 13 is formed in the surface of the upper cover 12, the heating device 4 is disposed at the opening 13, and heat generated by the heating device 4 from bottom to top is dissipated from the opening to the outside.

In this embodiment, the fan assembly 10 includes a fan housing 32 and a forced convection perfusion fan 33 installed in the fan housing 32, a first air outlet 34 is provided on a side surface of the fan housing 32, a first air inlet 35 is provided on a top portion of the fan housing 32, and the heating device 4 includes a heating core 36, a heat dissipation fin 37, an installation housing 38, and an installation housing cover 39 adapted to the installation housing 38; the number of the heating cores 36 is two, two ends of the heating core 36 are provided with conductive contacts 40, two left and right side surfaces of the mounting housing 38 are provided with first through holes 41, the heat dissipation fins 37 are provided with second through holes 42, the heating core 36 is inserted into the heat dissipation fins 37 through the second through holes 42, the conductive contacts 40 at the two ends extend out of the first through holes 41 and are electrically connected with the control device 7, the top surface of the mounting housing 38 is provided with a second air outlet 43, the top of the front side surface of the mounting housing 38 is provided with a profile plate 44, and the bottom of the front side surface of the mounting housing 38 (namely, between the profile plate 44 and the bottom surface of the mounting housing 38) forms a second air inlet 45; the upper end and the lower end of the profile plate 44 are both bent outwards to form a first folded edge 46 and a second folded edge 47, the bottom surface of the mounting housing 38 is provided with an air deflector 48 which is inclined upwards from outside to inside, further, in this embodiment, an included angle (inner included angle) between the air deflector 48 and the bottom surface of the mounting housing 38 is 50 °, when the forced convection perfusion fan 33 is started, the forced convection perfusion fan sends out strong wind from the first air outlet 34 to enter the second air inlet 45, the second folded edge 47 is used for blocking the strong wind, so that most of the strong wind can be intensively fed into the mounting housing 38 from the second air inlet 45, and the air deflector 48 is used for changing the wind direction, so that the strong wind can be quickly blown to the heating core 36 after entering the second air inlet 45, and heat dissipation is accelerated; in this embodiment, installation cap 39 fixed mounting be in the top of installation casing 38, just the back of installation cap 39 with the upper surface of first hem 46 offsets, in this embodiment, the surface of installation cap 39 is provided with third air outlet 49, under the effect of strong wind, follows the heat that second air outlet 43 distributed away finally follows third air outlet 49 distributes away, gives user and interior space heating, can replace the air conditioner, replaces and warms up, remedies not adorn the regret that warms up, and it is more energy-conserving more high-efficient than the air conditioner, and the practicality is higher.

In this embodiment, there are four support columns 3, each support column 3 includes a hollow column 50 and an outer shell 51 sleeved on an outer wall of the hollow column 50, the top of the hollow column 50 is fixedly connected to the panel 1, and the lifting device 8 includes a nut member 14 fixed to an inner wall of the hollow column 50 (the fixing manner may be various, in this embodiment, a fastening interface is provided on an inner wall of the hollow column 50, a fastening portion is provided on a surface of the nut member, and the nut member is fixedly connected to the support column by installing a connecting member having the fastening portion and the fastening interface which are adapted to each other), a lead screw 15 adapted to a screw hole of the nut member 14, and a speed reducer driving the lead screw 15 to rotate circumferentially; the speed reducers are arranged inside each supporting upright 3, wherein a transmission shaft 16 is arranged between three groups of adjacent speed reducers, the reducer comprises a housing 17, a first bevel gear 18 and a second bevel gear 19, said first bevel gear 18 being vertically mounted in the housing 17 by means of bearings (not shown in the figures), said second bevel gear 19 is mounted horizontally in said housing 17 by means of bearings (not shown in the figures), said first bevel gear 18 meshing with the second bevel gear 19, and the axes of the two bevel gears are perpendicular to each other, the screw rod 15 is fixedly connected with the first bevel gear 18 through a bearing, two ends of the transmission shaft 16 are respectively and fixedly connected with second bevel gears 19 in two adjacent speed reducers, a double-shaft motor 20 is arranged on any one transmission shaft 16, two output shafts of the double-shaft motor 20 are respectively connected with the transmission shaft 16 through a coupling (not shown in the figure); when the double-shaft motor works, the double-shaft motor drives the transmission shaft 16 to rotate through the coupler, so that the second bevel gear 19 connected to the transmission shaft 16 rotates, the screw rod 15 connected to the first bevel gear 18 is driven to rotate circumferentially, at the moment, the nut member 14 moves along the axial direction of the screw rod 15, and the hollow cylinder 50 fixed with the nut member 14 is driven to move, so that the height of the tea table is controlled to rise and fall.

Further, the control device 7 is provided with a lifting device driving circuit, and the lifting device driving circuit includes a main control chip U1 (model is STM32F103C8T6), a power converter U2 (model is XL1509), a photocoupler U3, an inductor L2, an inductor L3, a diode D2, a diode D3, a triode Q2, a PMOS transistor P2, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6; the anode of the diode D2 is connected with a VCC power supply, and the cathode of the diode D2 is connected with the pin 1 of the power converter U2; the capacitor C5 is connected in parallel with the capacitor C3, one end of the capacitor C5 is connected with a node between the cathode of the diode D2 and the pin 1 of the power converter U2, and the other end of the capacitor C5 is grounded; the 3 pins of the power converter U2 are divided into two paths, one path is grounded through the capacitor C6, and the other path is connected with the 1 pin of the photoelectric coupler U3; pins 5-8 of the power converter U2 are all grounded; the anode of the diode D3 is grounded, the cathode is divided into two paths, one path is connected with the 2 pins of the power converter U2, and the other path is connected with the node of the capacitor C6 and the 3 pins of the power converter U2 through the inductor L2; the pin 2 of the photoelectric coupler U3 is connected with the pin 28 of the main control chip U1; the pin 3 of the photoelectric coupler U3 is connected with the pin 1 of the triode Q2 through the resistor R5; the 4 pin of the photoelectric coupler U3 is connected with the 2 pin of the PMOS pipe P2 through the resistor R6; the 1 pin of the PMOS tube P2 is divided into two paths, one path is connected with the node of the resistor R6 and the 2 pin of the PMOS tube P2 through the resistor R7, and the other path is connected with the 3 pin of the triode Q2; the pin 2 of the triode Q2 is grounded; the 3 pins of the PMOS pipe P2 are divided into two paths through the inductor L3, and one path is grounded through the capacitor C4; the other path is connected with the input end of the double-shaft motor 20; in this embodiment, when the user starts the lifting device 8, the power supply (VCC) flows from the anode of the diode D2, and is first filtered by the capacitor C3 and the capacitor C5, and then transmitted to the 1 pin of the power converter U2, and then the load voltage is output after being adjusted by the power converter U2, and transmitted to the 1 pin of the photocoupler U3, at this time, the control signal sent by the main control chip U1 is transmitted to the 2 pin of the photocoupler U3, in this embodiment, the photocoupler U3 plays an isolation protection role to prevent other electrical signals in the circuit from interfering with the main control chip U1, and affecting the normal operation of the main control chip U1, and after the control signal passes through the 2 pin of the photocoupler U3, the control signal is output from the 3 and 4 pins thereof, and is first amplified by the triode Q2, and the amplified control signal is output from the 3 pin of the triode Q2, and the voltage value is adjusted by the resistor R7 to turn on the PMOS tube P2, therefore, the output voltage is supplied to the dual-shaft motor 20, the inductor L3 plays a role in charging and storing energy in this embodiment, when the load voltage of the dual-shaft motor 20 rises, the pin 1 of the PMOS transistor P2 is turned off, the inductor L3 provides a working power supply for the dual-shaft motor 20, along with the loss of the stored electric quantity on the inductor L3, the load voltage of the dual-shaft motor 20 is reduced, the pin 1 of the PMOS transistor P2 is turned on again, the working power supply is provided for the dual-shaft motor 20, and the dual-shaft motor has the advantages of simple structure, high stability and the like.

In this embodiment, an anti-scald component 21 is disposed right above the heating device 4; prevent scalding subassembly 21 and be used for the check to keep off heating device 4 prevents that the mistake from touchhing heating device 4 and the condition of being scalded, effectively improves the security performance of product.

In this embodiment, an object placing plate 22 is further disposed between the panel 1 and the base 2, arc-shaped connecting arms 23 are mounted at four corners of the object placing plate 22, and the object placing plate 22 is mounted between the panel 1 and the base 2 through the arc-shaped connecting arms 23); specifically, in this embodiment, a connecting plate 28 is assembled at the top of the supporting upright 3, a threaded hole is formed in the connecting plate 28, one end of the arc-shaped connecting arm 23 is fixedly connected to the object placing plate 22, an assembling hole matched with the threaded hole is formed in the other end of the arc-shaped connecting arm, and the threaded hole is connected with the assembling hole through a screw to fix the arc-shaped connecting arm 23 and the connecting plate 28; in this embodiment, the inside of putting thing board 22 is the cavity insulating layer for keep apart the heat that generates heat device 4 and produce, the user accessible put thing board 22 and deposit article such as tea set, effectively promote the usage space of tea table, improve the practicality of product.

In this embodiment, a display screen 24 is disposed on the surface of the supporting upright 3, and the display screen 24 is electrically connected to the control device 7; the display screen 24 is a touch display screen, and is used for providing an operation interface for a user and displaying the working states of the control device 7, the heat generating device 4 and the heat dissipating device 5.

In this embodiment, the base 2 is provided with a power socket 25, a USB charging interface 26 and a control key 27, and the control key 27 is electrically connected with the control device 7; the power socket 25 is a 220V interface, so that power can be conveniently supplied to household appliances such as an electric tea stove, an induction cooker and the like; the USB charging interface 26 is a 5V interface, so that mobile phones and the like can be charged conveniently; the control key 27 is used for controlling the start and stop of the control device 7, the heat generating device 4 and the like.

In this embodiment, the control device 7 is further electrically connected with a voice module 31, so that a user can perform voice control on the tea table through the voice module 31, and the practicability of the tea table and the convenience of operation are effectively improved.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.

Claims

1. The utility model provides a warm tea table of multi-functional intelligence electricity, includes panel (1) and base (2), be provided with support post (3) between panel (1) and base (2), its characterized in that still be provided with between panel (1) and base (2) and generate heat device (4), heat abstractor (5), wireless communication device (6) and controlling means (7), the inside of support post (3) is provided with elevating gear (8), generate heat device (4), heat abstractor (5), wireless communication device (6) and elevating gear (8) all with controlling means (7) electricity is connected.

2. The multifunctional intelligent electric heating tea table according to claim 1, wherein the heat dissipation device (5) comprises a support (9) and a fan assembly (10), the base (2) comprises a lower cover body (11) and an upper cover body (12) matched with the lower cover body (11), an accommodating cavity is formed between the upper cover body (12) and the lower cover body (11), the support (9) is fixedly installed in the accommodating cavity, and the fan assembly (10) is fixedly installed on the support (9).

3. The multifunctional intelligent electric heating tea table according to claim 2, wherein an opening (13) is formed in the surface of the upper cover body (12), and the heating device (4) is disposed at the opening (13).

4. The multifunctional intelligent electric heating tea table according to claim 1, wherein the number of the supporting columns (3) is four, the supporting columns (3) comprise hollow cylinders (50) and outer shells (51) sleeved on the outer walls of the hollow cylinders (50), the tops of the hollow cylinders (50) are fixedly connected with the panel (1), the lifting device (8) comprises nut members (14) fixed to the inner walls of the hollow cylinders (50), lead screws (15) matched with screw holes of the nut members (14), and speed reducers driving the lead screws (15) to rotate circumferentially; the speed reducers are arranged inside each supporting upright post (3), a transmission shaft (16) is arranged between three groups of adjacent speed reducers, the reducer comprises a housing (17), a first bevel gear (18) and a second bevel gear (19), the first bevel gear (18) is vertically installed in a housing (17) through a bearing, the second bevel gear (19) is horizontally installed in the housing (17) through a bearing, the first bevel gear (18) is engaged with the second bevel gear (19), the axes of the two bevel gears are vertical to each other, the screw rod (15) is fixedly connected with the first bevel gear (18) through a bearing, two ends of the transmission shaft (16) are respectively and fixedly connected with second bevel gears (19) in two adjacent speed reducers, a double-shaft motor (20) is arranged on any one transmission shaft (16), two output shafts of the double-shaft motor (20) are respectively connected with the transmission shaft (16) through couplers.

5. The multifunctional intelligent electric heating tea table according to claim 4, wherein the control device (7) is provided with a lifting device driving circuit, and the lifting device driving circuit comprises a main control chip U1, a power converter U2, a photoelectric coupler U3, an inductor L2, an inductor L3, a diode D2, a diode D3, a triode Q2, a PMOS tube P2, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6; the anode of the diode D2 is connected with a VCC power supply, and the cathode of the diode D2 is connected with the pin 1 of the power converter U2; the capacitor C5 is connected in parallel with the capacitor C3, one end of the capacitor C5 is connected with a node between the cathode of the diode D2 and the pin 1 of the power converter U2, and the other end of the capacitor C5 is grounded; the 3 pins of the power converter U2 are divided into two paths, one path is grounded through the capacitor C6, and the other path is connected with the 1 pin of the photoelectric coupler U3; pins 5-8 of the power converter U2 are all grounded; the anode of the diode D3 is grounded, the cathode is divided into two paths, one path is connected with the 2 pins of the power converter U2, and the other path is connected with the node of the capacitor C6 and the 3 pins of the power converter U2 through the inductor L2; the pin 2 of the photoelectric coupler U3 is connected with the pin 28 of the main control chip U1; the pin 3 of the photoelectric coupler U3 is connected with the pin 1 of the triode Q2 through the resistor R5; the 4 pin of the photoelectric coupler U3 is connected with the 2 pin of the PMOS pipe P2 through the resistor R6; the 1 pin of the PMOS tube P2 is divided into two paths, one path is connected with the node of the resistor R6 and the 2 pin of the PMOS tube P2 through the resistor R7, and the other path is connected with the 3 pin of the triode Q2; the pin 2 of the triode Q2 is grounded; the 3 pins of the PMOS pipe P2 are divided into two paths through the inductor L3, and one path is grounded through the capacitor C4; the other path is connected with the input end of the double-shaft motor (20).

6. The multifunctional intelligent electric heating tea table according to claim 1, wherein an anti-scald component (21) is arranged right above the heating device (4).

7. The multifunctional intelligent electric heating tea table according to claim 1, wherein an object placing plate (22) is further arranged between the panel (1) and the base (2), arc-shaped connecting arms (23) are mounted at four corners of the object placing plate (22), and the object placing plate (22) is mounted between the panel (1) and the base (2) through the arc-shaped connecting arms (23).

8. The multifunctional intelligent electric heating tea table according to claim 1, wherein a display screen (24) is arranged on the surface of the supporting upright post (3), and the display screen (24) is electrically connected with the control device (7).

9. The multifunctional intelligent electric heating tea table according to claim 1, wherein the base (2) is provided with a power socket (25), a USB charging interface (26) and a control key (27), and the control key (27) is electrically connected with the control device (7).