阅读说明：本技术 一种基于物联网的车载蓝牙设备 (Vehicle-mounted Bluetooth device based on Internet of things ) 是由 冯志林 刘春艳 于 2021-07-05 设计创作，主要内容包括：本发明公开了一种基于物联网的车载蓝牙设备,属于车载蓝牙设备技术领域,该基于物联网的车载蓝牙设备,包括：安装座、夹持装置、电气仓、调节装置以及报警器本体,通过启动驱动电机,驱动电机的输出端通过联轴器带动丝杆转动,由于在驱动块的内部开有与丝杆相适配的内螺纹,从而使驱动电机带动丝杆转动的旋转工作变为移动驱动块的直线工作,当驱动块在丝杆上移动时通过耳板带动第一固定环在安装座内的转动,由于套筒通过销轴转动连接在第一固定环和第二固定环之间,当第一固定环转动时,带动三组夹臂之间的开合,将电气仓放置在三组夹臂之间进行固定,达到快速安装的目的。(The invention discloses a vehicle-mounted Bluetooth device based on the Internet of things, belonging to the technical field of vehicle-mounted Bluetooth devices, and the vehicle-mounted Bluetooth device based on the Internet of things comprises: the mount pad, clamping device, the electric storehouse, adjusting device and alarm body, through starting driving motor, driving motor's output passes through the shaft coupling and drives the lead screw rotation, because open the internal thread that has with lead screw looks adaptation in the inside of drive block, thereby make driving motor drive lead screw pivoted rotary work become the straight line work that removes the drive block, drive the rotation of first solid fixed ring in the mount pad through the otic placode when the drive block moves on the lead screw, because the sleeve rotates through the round pin axle to be connected between first solid fixed ring and the solid fixed ring of second, when first solid fixed ring rotates, drive opening and shutting between three arm lock of group, place electric storehouse and fix between three arm lock of group, reach the purpose of quick installation.)

1. The utility model provides an on-vehicle bluetooth equipment based on thing networking which characterized in that includes:

the mounting base (1) is provided with a mounting hole (101) in threaded connection with the inner top of the automobile;

the clamping device (2), the clamping device (2) is rotatably connected in the mounting seat (1);

the electric bin (3) is formed in the clamping device (2), and an adjusting device (4) is installed at one end, far away from the clamping device (2), of the electric bin (3);

alarm body (5), alarm body (5) fixed mounting is on adjusting device (4), and is in the same place through wire and the inside electric connection in electric storehouse (3).

2. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 1, wherein: clamping device (2) are including first solid fixed ring (201), be connected with otic placode (202) on first solid fixed ring (201), fixed mounting has drive block (203) on otic placode (202), drive block (203) internal rotation is connected with lead screw (204), the one end that drive block (203) were kept away from in lead screw (204) is rotated and is connected with fixing base (205), driving motor (206) are installed through the motor cabinet to the opposite side of fixing base (205), the output of driving motor (206) passes through the shaft coupling and rotates with lead screw (204) and link together.

3. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 2, wherein: the first fixing ring (201) is provided with a second fixing ring (207), a connecting plate (208) is connected between the second fixing ring (207) and the first fixing ring (201), and a movable cavity (209) is formed between the adjacent connecting plates (208).

4. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 3, wherein: clamping device (2) are still including boss (210) that are located mount pad (1), rotate through the round pin axle on boss (210) and be connected with arm lock (211), fixed mounting has sleeve (212) on arm lock (211), sleeve (212) rotate through the round pin axle and connect between first solid fixed ring (201) and the solid fixed ring of second (207), open the other end of arm lock (211) has notch (2111), notch (2111) internal rotation is connected with arc (213).

5. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 1, wherein: adjusting device (4) are including fan-shaped post (401), fan-shaped post (401) have fan-shaped board (402) along length direction's both sides fixed mounting, one side it has orbit groove (4021) to open on fan-shaped board (402), and is a pair of sliding connection has orbit board (403) on fan-shaped board (402).

6. The vehicle-mounted Bluetooth device based on the Internet of things of claim 5, wherein: be located a pair of install sector gear (404) on fan-shaped post (401) between sector plate (402), it has a pair of arc notch (4011) to open on fan-shaped post (401) that is located sector gear (404) both sides, the lower fixed surface of orbit board (403) installs a pair of axle bed (405), and is a pair of it is connected with threaded rod (406) to rotate between axle bed (405), the meshing links together between threaded rod (406) and sector gear (404).

7. The vehicle-mounted Bluetooth device based on the Internet of things of claim 6, wherein: and a guide rod (407) is vertically arranged on one side of the track plate (403), the guide rod (407) is slidably connected in the track groove (4021), and a nut (408) is in threaded connection with the guide rod (407).

8. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 1, wherein: the alarm is characterized in that an infrared sensor module (6), a high-brightness LED lamp (7) and a buzzer (8) are fixedly mounted on the alarm body (5), an alarm module (9) is arranged in the electric bin (3), and the alarm module (9) is electrically connected with the high-brightness LED lamp (7) and the buzzer (8).

9. The vehicle-mounted Bluetooth device based on the Internet of things as claimed in claim 1, wherein: still be provided with power module (10), bluetooth module (11), processing module (12) and button module (13) in electric storehouse (3), still inlay on alarm body (5) and be equipped with timing display (14), electrical connection between timing display (14) and processing module (12).

10. The vehicle-mounted Bluetooth device based on the Internet of things of claim 9, wherein: the alarm is characterized in that a power switch (15) and a monitoring button (16) are further arranged on the alarm body (5), and the power switch (15) and the monitoring button (16) are electrically connected with the button module (13).

Technical Field

The invention belongs to the technical field of vehicle-mounted Bluetooth equipment, and particularly relates to vehicle-mounted Bluetooth equipment based on the Internet of things.

Background

Bluetooth technology is an open global specification for wireless data and voice communications. The essence of the system is that a universal radio air interface is established for the communication environment between fixed equipment or mobile equipment, the communication technology is further combined with the computer technology, so that various 3C equipment can realize mutual communication or operation in a short distance range under the condition of no mutual connection of wires or cables, and the vehicle-mounted Bluetooth is an in-vehicle wireless hands-free system designed and developed on the basis of the wireless Bluetooth technology.

The utility model discloses a CN213244362U relates to a vehicle Bluetooth device based on the Internet of things, which comprises a vehicle Bluetooth body, the top of the vehicle Bluetooth body near the right side is fixedly connected with a loudspeaker, the top of the vehicle Bluetooth body near the left side is fixedly connected with a control panel, the lower surface of the vehicle Bluetooth body is fixedly connected with a expanding table, the inside of the expanding table is provided with a cavity, the top of the inner wall of the cavity is fixedly connected with a fixed frame, the bottom of the inner wall of the fixed frame is fixedly connected with a blowing fan, the blowing fan is positioned under the vehicle Bluetooth body, the utility model realizes the enhancement of the heat dissipation effect of the vehicle Bluetooth by the matching of the above structures, indirectly improves the working efficiency of the vehicle Bluetooth, reduces the condition that the vehicle Bluetooth can not normally operate due to the overhigh internal temperature, and is convenient for the staff to adjust the inclination angle and the height of the vehicle Bluetooth, brings convenience to the working personnel.

But above-mentioned vehicle-mounted bluetooth equipment monitoring range is not extensive enough to vehicle-mounted bluetooth can only monitor specific position after the installation, has the blind area easily, can't sense dead angle position in the car, and the security is not high.

Disclosure of Invention

The invention aims to provide vehicle-mounted Bluetooth equipment based on the Internet of things, and the vehicle-mounted Bluetooth equipment is used for solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an internet of things-based vehicle-mounted Bluetooth device, comprising: mount pad, clamping device, electric storehouse, adjusting device and alarm body.

Wherein, open on the mount pad and top threaded connection's mounting hole in the car.

Furthermore, the installation seat is of a circular ring structure and is fixedly installed on the inner top of the automobile through bolts, and the fixing effect is achieved.

Wherein, clamping device rotates to be connected in the mount pad.

Further, through the clamping device who sets up with the electrical bin fixed at the mount pad, compare traditional direct bolt fastening's mode, easy to assemble more and dismantle.

The electric bin is formed in the clamping device, and an adjusting device is installed at one end, far away from the clamping device, of the electric bin.

Furthermore, the electric bin is internally provided with a cavity structure for placing electrical elements, and the adjusting device can drive the device to rotate in an angle adjusting mode, so that the detection range is conveniently enlarged, and dead angles in the car are reduced.

The alarm body is fixedly mounted on the adjusting device and is electrically connected with the inside of the electric bin through a wire.

Further, the alarm body that sets up openly is the curved surface structure to detection range has been enlarged to a certain extent, and adopts the environmental protection plastics material, thereby guarantees to be nontoxic harmless to the people's health, improves functions such as prevention mechanism through the cooperation with on-vehicle system, makes alarm body more intelligent and networked.

As a preferable scheme of the invention, the clamping device comprises a first fixing ring, an ear plate is connected on the first fixing ring, a driving block is fixedly arranged on the ear plate, a screw rod is rotationally connected in the driving block, one end of the screw rod, far away from the driving block, is rotationally connected with a fixed seat, the other side of the fixed seat is provided with a driving motor through a motor seat, the output end of the driving motor is rotationally connected with the screw rod through a coupler, the arranged first fixing ring is rotationally connected with the mounting seat, the arranged driving motor is used as the power output of the clamping device, the output end of the driving motor drives the screw rod to rotate through the coupler by starting the driving motor, and as the internal thread matched with the screw rod is arranged in the driving block, the rotary work of the driving motor driving the screw rod to rotate is changed into the linear work of moving the driving block, provide power for the arm lock centre gripping electrical storage bin.

As a preferable scheme of the present invention, the first fixing ring is provided with a second fixing ring, a connecting plate is connected between the second fixing ring and the first fixing ring, a movable cavity is formed between adjacent connecting plates, the connecting plate is arranged to function as a connection between the first fixing ring and the second fixing ring, and the movable cavity is arranged to provide a space range for the movement of the clamping arm, so that the clamping arm can move in the movable cavity.

As a preferred scheme of the invention, the clamping device further comprises a boss positioned on the mounting seat, the boss is rotatably connected with a clamping arm through a pin shaft, a sleeve is fixedly mounted on the clamping arm, the sleeve is rotatably connected between the first fixing ring and the second fixing ring through the pin shaft, a notch is formed in the other end of the clamping arm, an arc-shaped plate is rotatably connected in the notch, the number of the arranged clamping arms is preferably three, when the driving block moves on the screw rod, the first fixing ring is driven to rotate in the mounting seat through the ear plate, the sleeve is rotatably connected between the first fixing ring and the second fixing ring through the pin shaft, when the first fixing ring rotates, the three groups of clamping arms are driven to open and close, a rubber layer is coated on a contact surface between the arc-shaped plate and the electrical bin, and the clamping device has wear-resistant and skid-resistant properties and can reinforce the stability of the electrical bin.

As a preferable scheme of the present invention, the adjusting device includes a sector-shaped column, two sides of the sector-shaped column along the length direction are fixedly provided with sector-shaped plates, one side of the sector-shaped plate is provided with a track groove, and a pair of the sector-shaped plates is slidably connected with a track plate, and the track groove provides a guiding function for the movement of the track plate.

As a preferred scheme of the present invention, a sector gear is mounted on a sector column located between a pair of sector plates, a pair of arc-shaped notches are formed in sector columns located at two sides of the sector gear, a pair of shaft seats are fixedly mounted on a lower surface of the track plate, a threaded rod is rotatably connected between the pair of shaft seats, the threaded rod and the sector gear are meshed and connected together, the pair of arc-shaped notches are provided to facilitate connection of a wire, a motor is connected to one end of the threaded rod through a coupling, and when an output end of the motor drives the threaded rod to rotate, the threaded rod and the sector gear are meshed and connected together, so that the track plate rotates along the track groove.

As a preferred scheme of the present invention, a guide rod is vertically installed at one side of the track plate, the guide rod is slidably connected in the track groove, and a nut is threadedly connected to the guide rod.

As a preferred scheme of the invention, the alarm body is fixedly provided with an infrared sensor module, a high-brightness LED lamp and a buzzer, the electrical bin is internally provided with an alarm module, and the alarm module is electrically connected with the high-brightness LED lamp and the buzzer.

As a preferable scheme of the invention, a power module, a Bluetooth module, a processing module and a button module are further arranged in the electric bin, a timing display is further embedded in the alarm body, and the timing display is electrically connected with the processing module.

As a preferable scheme of the invention, the alarm body is further provided with a power switch and a monitoring button, and the power switch and the monitoring button are electrically connected with the button module.

The invention has the beneficial effects that:

1. according to the invention, the driving motor is started, the output end of the driving motor drives the screw rod to rotate through the coupler, the internal thread matched with the screw rod is formed in the driving block, so that the rotary work of the driving motor for driving the screw rod to rotate is changed into the linear work for moving the driving block, when the driving block moves on the screw rod, the first fixing ring is driven to rotate in the mounting seat through the lug plate, the sleeve is rotationally connected between the first fixing ring and the second fixing ring through the pin shaft, when the first fixing ring rotates, the three groups of clamping arms are driven to be opened and closed, and the electric bin is placed among the three groups of clamping arms to be fixed, so that the purpose of rapid mounting is achieved.

2. According to the invention, the motor is started, and when the output end of the motor drives the threaded rod to rotate, the threaded rod and the sector gear are meshed and connected together, so that the track plate rotates along the track groove, the alarm body can conveniently rotate in an angle, the detection dead angle is reduced, and the equipment safety is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a second perspective structure of the present invention;

FIG. 3 is a schematic view of a clamping device according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 6 is an enlarged view of the structure at C of FIG. 1 according to the present invention;

fig. 7 is a flow chart of the operation of the present invention.

In the figure: 1. a mounting seat; 101. mounting holes; 2. a clamping device; 201. a first retaining ring; 202. An ear plate; 203. a drive block; 204. a screw rod; 205. a fixed seat; 206. a drive motor; 207. a second retaining ring; 208. a connector tile; 209. a movable cavity; 210. a boss; 211. clamping arms; 2111. a notch; 212. a sleeve; 213. an arc-shaped plate; 3. an electric bin 4 and an adjusting device; 401. a sector column; 4011. An arc-shaped notch; 402. a sector plate; 4021. a track groove; 403. a track board; 404. a sector gear; 405. a shaft seat; 406. a threaded rod; 407. a guide bar; 408. a nut; 5. an alarm body; 6. an infrared sensor module; 7. a high brightness LED lamp; 8. a buzzer; 9. an alarm module; 10. a power supply module; 11. a Bluetooth module; 12. a processing module; 13. a button module; 14. a timing display; 15. A power switch; 16. a monitor button.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 to 7, an internet of things-based vehicle bluetooth device includes: mount pad 1, clamping device 2, electrical cabin 3, adjusting device 4 and alarm body 5.

In order to facilitate installation and fixation of the alarm body 5, the mounting seat 1 is provided with a mounting hole 101 in threaded connection with the inner top of the automobile.

Further, mount pad 1 that sets up is the ring structure, and through bolt fixed mounting in the car on the top, plays the fixed action, and mount pad 1 pushes up in order to adapt to panorama skylight or car weaving in addition, and mount pad 1 also can be for the sucking disc or the one side at mount pad 1 bonds there is the magic subsides.

Wherein, clamping device 2 rotate to be connected in mount pad 1.

Further, through the clamping device 2 who sets up with electric storehouse 3 fix at mount pad 1, compare traditional direct bolt fastening's mode, easy to assemble more and dismantle.

Wherein, the electrical bin 3 is formed in the clamping device 2, and an adjusting device 4 is installed at one end of the electrical bin 3 far away from the clamping device 2.

Further, the inside cavity structure that is of electrical bin 3 that sets up for place electrical components, can drive the device through adjusting device 4 that sets up and carry out the angle modulation rotation, be convenient for enlarge detection range, reduce dead angle in the car.

Wherein, alarm body 5 fixed mounting is on adjusting device 4, and is in the same place through wire and the inside electric connection in electrical bin 3.

Further, alarm body 5 that sets up openly is the curved surface structure to enlarged detection range to a certain extent, and adopted the environmental protection plastics material, thereby guaranteed to be nontoxic harmless to the people's health, improve functions such as prevention mechanism through the cooperation with on-vehicle system, make alarm body 5 more intelligent and networking.

Specifically, the clamping device 2 comprises a first fixing ring 201, an ear plate 202 is connected to the first fixing ring 201, a driving block 203 is fixedly mounted on the ear plate 202, a lead screw 204 is connected to the driving block 203 in a rotating mode, one end, far away from the driving block 203, of the lead screw 204 is rotatably connected with a fixing seat 205, a driving motor 206 is mounted on the other side of the fixing seat 205 through a motor seat, and the output end of the driving motor 206 is rotatably connected with the lead screw 204 through a coupler.

In a further embodiment: the first fixing ring 201 is rotatably connected with the mounting base 1, the driving motor 206 is used as power output of the clamping device 2, the output end of the driving motor 206 drives the screw rod 204 to rotate through the coupler by starting the driving motor 206, and the driving block 203 is internally provided with an internal thread matched with the screw rod 204, so that the driving motor 206 drives the screw rod 204 to rotate, the rotating work is changed into linear work for moving the driving block 203, and power is provided for the clamping arm 211 to clamp the electric bin 3.

Specifically, a second fixing ring 207 is arranged on the first fixing ring 201, connecting plates 208 are connected between the second fixing ring 207 and the first fixing ring 201, and a movable cavity 209 is formed between adjacent connecting plates 208.

In a further embodiment: the connecting plate 208 is arranged to connect the first fixing ring 201 and the second fixing ring 207, and the movable cavity 209 is arranged to provide a space range for the movement of the clamping arm 211, so that the clamping arm 211 can move in the movable cavity 209.

Specifically, clamping device 2 still includes boss 210 that is located on mount pad 1, rotates through the round pin axle on the boss 210 and is connected with arm lock 211, and fixed mounting has sleeve 212 on the arm lock 211, and sleeve 212 rotates through the round pin axle to be connected between first solid fixed ring 201 and the solid fixed ring 207 of second, and the other end of arm lock 211 is opened there is notch 2111, and the rotation is connected with arc 213 in notch 2111.

In a further embodiment: the arm lock 211 quantity that sets up is three as preferred, when the drive block 203 moves on lead screw 204 through otic placode 202 drive first solid fixed ring 201 the rotation in mount pad 1, because sleeve 212 passes through the round pin hub and rotates the connection between first solid fixed ring 201 and the solid fixed ring 207 of second, when first solid fixed ring 201 rotates, drive opening and shutting between three group's arm lock 211, it has the rubber layer to coat on the contact surface between arc 213 and electrical bin 3, have wear-resisting skid-resistant nature, consolidate electrical bin 3's stability.

Specifically, the adjusting device 4 includes a sector-shaped column 401, sector-shaped plates 402 are fixedly mounted on two sides of the sector-shaped column 401 along the length direction, a track groove 4021 is formed in one of the sector-shaped plates 402, and a track plate 403 is slidably connected to the pair of sector-shaped plates 402.

In a further embodiment: the track groove 4021 is provided to guide the movement of the track plate 403.

Specifically, a sector gear 404 is mounted on a sector column 401 located between a pair of sector plates 402, a pair of arc notches 4011 is formed on the sector column 401 located on two sides of the sector gear 404, a pair of axle seats 405 is fixedly mounted on the lower surface of the track plate 403, a threaded rod 406 is rotatably connected between the pair of axle seats 405, and the threaded rod 406 and the sector gear 404 are meshed and connected together.

In a further embodiment: the pair of arc notches 4011 is arranged to facilitate connection of wires, a motor is connected to one end of the threaded rod 406 through a coupler, and when the output end of the motor drives the threaded rod 406 to rotate, the threaded rod 406 is meshed with the sector gear 404, so that the track plate 403 rotates along the track groove 4021.

Specifically, a guide rod 407 is vertically installed on one side of the track plate 403, the guide rod 407 is slidably connected in the track groove 4021, and a nut 408 is threadedly connected to the guide rod 407.

In a further embodiment: through install the guide arm 407 perpendicularly in one side of trackpad 403, make guide arm 407 sliding connection in track groove 4021, be convenient for provide limiting displacement for the rotation of trackpad 403, the nut 408 that sets up is used for sealing the bottom of guide arm 407, prevents to drop.

Specifically, fixed mounting has infrared sensor module 6, high bright LED lamp 7 and bee calling organ 8 on the alarm body 5, is provided with alarm module 9 in the electric storehouse 3, and alarm module 9 and high bright LED lamp 7 and bee calling organ 8 between electrical connection.

In a further embodiment: the infrared sensor module 6 that sets up is seven as preferred quantity to the equidistance is installed on the arcwall face of alarm body 5, can carry out diversified detection, because infrared ray about 10um that human emission can be surveyed to infrared sensor module 6 carries out work, and obtains the warning effect through alarm module 9's audible-visual alarm mode, thereby personnel in the car are detected to in time quick.

Specifically, still be provided with power module 10, bluetooth module 11, processing module 12 and button module 13 in the electric storehouse 3, still inlay on the alarm body 5 and be equipped with timing display 14, electrical connection between timing display 14 and the processing module 12.

In a further embodiment: the power module 10 that sets up adopts efficient power supply circuit to combine rechargeable battery, can last the power supply to alarm body 5, improves functions such as prevention mechanism through the cooperation of the bluetooth module 11 that sets up and vehicle-mounted system, makes more intelligent and networking of alarm body 5, and the timing display 14 of setting begins the timing when the car is flame out, if the car owner does not return in the time of settlement, and alarm body 5 can send distress audible and visual signal.

Specifically, the alarm body 5 is further provided with a power switch 15 and a monitoring button 16, and the power switch 15 and the monitoring button 16 are electrically connected with the button module 13.

In a further embodiment: the power switch 15 and the monitoring button 16 are arranged to realize accurate control on the alarm body 5.

The working principle is as follows:

during installation, the driving motor 206 is started, the output end of the driving motor 206 drives the screw rod 204 to rotate through the coupler, and since the internal thread matched with the screw rod 204 is formed inside the driving block 203, the rotary work of the driving motor 206 driving the screw rod 204 to rotate is changed into the linear work of moving the driving block 203, when the driving block 203 moves on the screw rod 204, the ear plate 202 drives the first fixing ring 201 to rotate in the installation seat 1, and since the sleeve 212 is rotationally connected between the first fixing ring 201 and the second fixing ring 207 through the pin shaft, when the first fixing ring 201 rotates, the three groups of clamping arms 211 are driven to be opened and closed, and the electric bin 3 is placed between the three groups of clamping arms 211 to be fixed;

after the lock car is closed to the automobile flameout, the starter motor, when the output of motor drives threaded rod 406 and rotates, because the meshing links together between threaded rod 406 and sector gear 404, thereby make trackpad 403 rotate along orbit groove 4021, the alarm body 5 of being convenient for carries out the angle rotation, bluetooth module 11 in the electrical storage box 3 receives the signal and begins work, infrared sensor module 6 surveys when timing display 14 begins the timing, if detect someone in the car and the car owner not return in the time of settlement, alarm body 5 can send distress audible and visual signal, thereby play the warning effect.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.