Waterproof lamp with internal circulation heat dissipation function for stage
Technical Field
The invention relates to the field of heat-dissipation waterproof stage lamps, in particular to a waterproof lamp with internal circulation heat dissipation for a stage.
Background
With the development of society, in order to create special lighting effects indoors and outdoors, various special lamps should be operated, and the lamps are widely applied, such as stages, hotels and other occasions, and generally referred to as stage lighting equipment. The stage lamp mainly comprises a shell, a stage lamp, a light source and a control circuit, wherein the main equipment for generating special light effect is the stage lamp; a lens is arranged at the tail end along the light path direction of the light source; the related components between the light source and the lens can modulate the color, shape, intensity, pattern and the like of the light; and a moving part which is positioned outside the shell and can control the movement of the lamp.
The existing stage lamp is waterproof, and mainly adopts a structure for blocking rainwater, namely flowing air can flow from the inside and the outside of the air holes of the stage lamp, but the rainwater can be blocked by the blocking pieces on the air holes, so that the integral waterproof performance of the lamp is realized. Obviously, the waterproof structure of such stage light fixtures cannot block water from different directions and cannot effectively block the jet of water or the intrusion of large waves. The existing high-end outdoor stage lighting field needs the waterproof grade of the lamp to meet IPx56, and even higher.
In order to improve the waterproof grade of the lamp, the sealing degree of the stage lamp must be increased, however, the increase of the sealing degree of the lamp tends to prevent the high-temperature air flow of the lamp from flowing inside and outside, which greatly reduces the heat dissipation efficiency of the lamp and increases the weight and volume of the heat dissipation structure. If the sealing degree of the lamp is increased, the heat dissipation structure depends on the mode of air circulation and heat dissipation conducted by the radiator, the condition that the lamp is in an instantaneous high power state cannot be met, and the light source is easily damaged due to an overhigh temperature peak value, and the service life is shortened. In addition, in the existing stage lamp, optical components such as color, shape, intensity and pattern of lamplight can be modulated inside the existing stage lamp, so that light source components are all arranged on the inner wall of the shell, the lamp shell mainly has a structure which is in a split structure and runs through from top to bottom, or a structure which is split from left to right, or even a split structure at most, and a shell needs to be split during maintenance; the completely sealed shell structure needs to be completely dismantled for maintenance and overhaul, is difficult to maintain and operate, even possibly damages originally intact parts, is easy to damage the waterproof structure of the shell structure, needs to be subjected to waterproof sealing processing again for maintenance or inspection, and is very inconvenient to operate.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to: the invention aims to: the waterproof lamp with the internal circulation heat dissipation function for the stage can solve the problem that the lamp heat dissipation efficiency is low under the condition that the lamp shell is highly sealed, further solves the heat dissipation problem of the lamp at the time of temperature peak, and solves the problem that the maintenance and detection of the sealed shell are inconvenient.
In order to achieve the purpose, the invention provides a stage-used waterproof lamp with internal circulation heat dissipation, which comprises a lamp main body and a light source assembly arranged in the lamp main body, wherein the lamp main body comprises a waterproof shell and an air supply assembly forming an annular gas flow channel along the inner part of the waterproof shell, the waterproof shell is provided with a first fin group along the inner walls of two sides of the annular gas flow channel, and the outer wall of the waterproof shell is provided with a second fin group corresponding to the first fin group.
The above-mentioned radiating waterproof lamps and lanterns of inner loop for stage, as preferred, the lamps and lanterns main part still including connect in the inside light source subassembly of waterproof casing, the air supply subassembly including set up in the first air supply arrangement of first fin group front end, and connect in the light source subassembly and towards the second air supply arrangement of the air supply of first fin group rear end, first air supply arrangement and second air supply arrangement's air supply opposite direction.
Preferably, the light source assembly comprises a light source support and a light source main body, the second air supply devices are arranged on two sides of the light source support, the light source support is further provided with a third air supply device and an air guide portion, the third air supply device is respectively arranged on the upper side and the lower side of the light source main body, one end of the air guide portion is connected with an air outlet of the third air supply device, and the other end of the air guide portion is connected with the inside of the light source main body.
Preferably, the lamp body further comprises a heat dissipation assembly hermetically connected to an opening at one end of the waterproof shell; the heat dissipation assembly comprises a heat conduction substrate, a third fin group connected to the inner side of the heat conduction substrate, a fourth fin group connected to the outer side of the heat conduction substrate, and a fourth air supply device connected to the outer side of the heat conduction substrate and used for supplying air towards the fourth fin group; the third fin group is positioned on the path of the annular gas flow passage.
The above-mentioned inner loop radiating waterproof lamp for stage is preferable, the lamp main body further comprises a heat dissipation assembly hermetically connected to an opening at one end of the waterproof casing, the heat dissipation assembly comprises a heat conduction substrate and a semiconductor refrigeration part, the heat conduction substrate is hermetically connected to the waterproof casing, a cold end of the semiconductor refrigeration part is connected to the inner side of the heat conduction substrate, and a hot end of the semiconductor refrigeration part faces towards the inside of the waterproof casing.
Preferably, the semiconductor refrigerating part comprises a semiconductor refrigerating piece, a refrigerating fin group and a refrigerating air supply device, the hot end of the semiconductor refrigerating piece is connected to the heat conducting substrate, the cold end of the semiconductor refrigerating piece is connected to the bottom of the refrigerating fin group, and the top of the refrigerating fin group is connected with the refrigerating air supply device.
Preferably, the lamp body comprises an optical assembly connected inside the waterproof housing, and a light source assembly connected inside the waterproof housing and adjacent to the heat dissipation assembly; waterproof casing is provided with the through hole along the adjacent side of annular gas flow channel, the inner wall of waterproof casing is provided with the installation department, optical assembly and/or light source subassembly set up respectively in mounting substrate, mounting substrate detachably connect in the installation department, through hole detachably sealing connection has the apron.
Foretell radiating waterproof lamps and lanterns of inner loop for stage, as preferred, the installation department includes along a plurality of first fixed point locations of a waterproof housing radial distribution, mounting substrate is including corresponding to the fixed point location of second of first fixed point location distribution position, first fixed point location is connected with the cooperation of the fixed point location detachably of second.
Preferably, the waterproof housing includes two sub-housings hermetically connected to each other, and a connection seam of the sub-housings is connected to the through hole.
Preferably, the waterproof housing is made of aluminum alloy, and the first fin group and/or the second fin group are integrally connected to the waterproof housing.
Compared with the prior art, the invention has the following advantages:
(1) according to the stage lamp, the air supply assembly capable of forming the annular gas flow channel is arranged in the waterproof shell meeting the waterproof grade for blocking the flow of the air inside and outside, the first fin groups are arranged on two sides of the annular gas flow channel arranged in the waterproof shell, the first fin groups are used for absorbing heat generated by the annular gas flow channel and transmitting the heat to the second fin groups arranged at corresponding positions outside the waterproof shell, and finally, high-efficiency heat dissipation is carried out by utilizing internal air circulation and the shell structure while the high-grade waterproof performance of the stage lamp is met. The convection current of the inner space of the waterproof shell and the heat dissipation on the shell structure are fully utilized by the structure, the whole body still has light weight and maneuverability, the main body of the head shaking lamp can be used as one part of the head shaking lamp, the utilization rate of the inner space of the lamp can be improved, the structural complexity is not increased, and the convenient lamp is processed and dissipated.
(2) According to the invention, the first air supply device is arranged to form flowing air towards one side at the front end of the waterproof shell, and the second air supply device is arranged to form flowing air towards the other side on the light source main body, so that annular air flow is realized, the air flows in the waterproof shell are mutually linked, the influence of other parts of the lamp is small, the air has high fluidity, and the improvement of the heat dissipation efficiency is realized.
(3) In the annular gas flow channel convection heat dissipation of the air supply assembly, the third air supply device and the air guide part are further arranged to dissipate heat in the light source main body, and the radial temperature balance and the internal and external temperature balance of the light source main body can be balanced.
(4) According to the invention, the heat dissipation assembly is arranged at the bottom end of the waterproof shell, and the space on two sides of the light source assembly and the second air supply device is utilized to quickly transfer the heat of the annular air flow channel to the outside air from the third fin assembly, the heat conduction substrate, the fourth fin assembly and the fourth air supply device in sequence.
(5) According to the invention, the temperature stability of the light source main body can be improved by actively cooling, the service life of the light source main body is prolonged, the operating power of the light source main body is expanded, the lamp is allowed to carry out more complicated conversion control, the space in the lamp is not required to be increased, the overall weight of the lamp is not required to be increased too much, the arrangement space and the weight of a heat dissipation structure are reduced, and the design of the movement performance is convenient to meet when the lamp is used as a moving head lamp.
(6) According to the invention, the through hole and the installation parts distributed on the radial direction of the through hole are arranged, the optical assembly and the light source assembly are respectively arranged on the installation substrates, the installation substrates can be placed in the waterproof shell through the through hole and are fixed on the installation parts, and finally the through hole is sealed and fixed through the cover plate, so that the installation problem of the internal parts of the waterproof shell is firstly solved, the maintenance and detection can be very convenient, and the waterproof performance of the airtight level is achieved on the whole.
(7) According to the invention, the material of the waterproof shell and the connection mode of the first fin group and the second fin group are utilized, so that the connection clearance between the fins and the shell is effectively reduced, the heat conduction efficiency is increased, the processing procedures are reduced, and the production efficiency is improved.
The invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic cross-sectional front view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an overall exploded perspective structure of an embodiment of the present invention;
fig. 3 is a schematic perspective view of the heat dissipation assembly according to the embodiment of the invention;
FIG. 4 is a schematic perspective view of a light source module according to an embodiment of the present invention;
fig. 5 is an exploded perspective view of the housing according to the embodiment of the present invention.
The reference signs are: the light source module comprises a waterproof shell 1, a heat dissipation assembly 2, a lens 3, an optical assembly 4, a light source assembly 5, an air supply assembly 6, a first fin group 11, a second fin group 12, a through hole 14, an installation part 15, a first fixing point 151, an installation substrate 16, a second fixing point 161, a cover plate 17, a sub-shell 18, a heat conduction substrate 21, a third fin group 22, a fourth fin group 23, a fourth air supply device 24, a semiconductor refrigerating part 25, a semiconductor refrigerating sheet 251, a refrigerating fin group 252, a refrigerating air supply device 253, a light source support 51, a light source body 52, a third air supply device 53, an air guide part 54, a first air opening 541, a second air opening 542, a first air supply device 61, an installation plate 62 and a second air supply device 63.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, a stage-use waterproof lamp with internal circulation heat dissipation includes a waterproof housing 1, a heat dissipation assembly 2, a lens 3, an optical assembly 4, a light source assembly 5, an air supply assembly 6, a first fin group 11, and a second fin group 12. The heat dissipation assembly 2 is connected to the opening at one end of the waterproof shell 1 in a sealing manner, the lens 3 is connected to the lens 3 at the opening at the other end of the waterproof shell 1 in a sealing manner, the optical assembly 4 is connected to the inside of the waterproof shell 1, the light source assembly 5 is connected to the inside of the waterproof shell 1 and is adjacent to the heat dissipation assembly 2, and the air supply assembly 6 forms an annular air flow channel along the inside of the waterproof shell 1. The waterproof casing 1 is provided with a first fin group 11 along the inner wall of the two sides of the annular gas flow passage, and the outer wall of the waterproof casing 1 is provided with a second fin group 12 corresponding to the first fin group 11. When the lamp operates, the waterproof shell 1 can prevent water from entering, and can play a role in providing a lamp component mounting position and protecting the lamp component in order to improve the waterproof performance and prevent the circulation of inside and outside air. The light source assembly 5 generates a light beam that is adjusted by the optical assembly 4 according to the setting and emitted from the lens 3. When the light source assembly 5 operates, a large amount of heat is generated, the heat is transferred to the heat dissipation assembly 2, and the heat dissipation assembly 2 is transferred to the outside in a heat conduction manner. The air supply assembly 6 blows high-temperature air at the light source in the waterproof shell 1 and forms an annular air flow channel. This annular gas will carry out the heat transfer with the first fin group 11 that sets up in waterproof casing 1 inside both sides, and the heat that first fin group 11 absorbed will transmit to the second fin group 12 that sets up in waterproof casing 1 outside correspondence both sides, and second fin group 12 will carry out the heat transfer with the outside air, realizes rapid cooling.
As shown in fig. 1, 2 and 5, in order to further improve the convection heat dissipation efficiency by arranging the air supply assembly 6 in the sealed housing, in the embodiment, the air supply assembly 6 includes a first air supply device 61 disposed at the front end of the first fin group 11, and a second air supply device 63 connected to the light source assembly 5 and supplying air toward the rear end of the first fin group 11, and the air supply directions of the first air supply device 61 and the second air supply device 63 are opposite. The first air supply device 61 is an axial flow fan disposed at two sides of the waterproof housing 1, the axial flow fan is mounted on a mounting plate 62 connected to the first fin group 11, the mounting plate 62 is provided with an opening at a mounting position of the axial flow fan for air circulation, the axial flow fan at one side draws flowing air relative to the first fin group 11 at the side, the axial flow fan at the other side blows air relative to the first fin at the side, and the temperature of the annular air flowing to each place is close to each other in a state that the air flows at a high speed. The mounting plate 62 may facilitate the mounting of the axial flow fan while serving a gas guiding function. The light source assembly 5 includes a light source main body 52 and a light source support 51, including but not limited to a lamp holder electrically connected to a COB lamp bead or a metal halide bulb, the second air blowing device 63 is two axial fans disposed at two sides of the light source support 51, and the light source support 51 is provided with an opening for forming an annular air flow channel and baffles at the other two sides. The axial fans on both sides of the upper end of the waterproof casing 1 supply air toward one side, and the axial fans on both sides of the lower end light source main body 52 supply air toward the other side, forming an annular gas flow channel. More specifically, the radial width of the waterproof housing 1 from one end of the heat dissipation assembly 2 to one end of the lens 3 is gradually decreased, the axial flow fan of the first air supply device 61 is installed at a splayed relative included angle, and the axial flow fan of the second air supply device 63 is installed at an inverted splayed relative included angle. The first fin group 11 includes a plurality of protruding rib structures disposed on the inner wall of the waterproof housing 1, and the rib structures are arranged along the longitudinal direction, that is, along the flowing direction of the annular gas flow passage, so as to achieve the effect of facilitating the flow of the internal gas. The second fin group 12 includes a plurality of protruding rib structures disposed on the outer wall of the waterproof housing 1 at positions corresponding to the first fin group 11, and the rib structures are also disposed in the longitudinal direction, so as to facilitate heat conduction of the first fin group 11. Regarding the shape of the waterproof housing 1, specifically, the radial cross-sections of the two side surfaces of the waterproof housing 1 provided with the first fin group 11 are arc-shaped, the scheme can increase the arrangement area of the first fin group 11 and the second fin group 12, and also increase the contact area between the internal air fluid and the waterproof housing 1. It is understood that the number of the first air blowing devices 61 and the second air blowing devices 63 may be single or two or more, and the arrangement position thereof may be at other positions forming the annular gas flow passage.
As shown in fig. 1, 2 and 4, in order to further dissipate heat inside the lamp cap of the lamp, the embodiment specifically includes that the light source support 51 is further provided with a third air supply device 53, and the third air supply device 53 is respectively provided with a blower fan at the upper side and the lower side of the light source support 51. One end of the air guiding portion 54 is connected to an air outlet of the blower fan, and the other end of the air guiding portion 54 is connected to the inside of the light source body 52, i.e., the inner space of the base. The section of the air guiding part 54 connected with the inside of the lamp holder is provided with a first air opening 541, the position of the first air opening 541 deviates from the center, the orientations of the first air openings 541 on the upper side and the lower side are staggered, the first air opening 541 on the upper side is located on the left side, and the first air opening 541 on the lower side is located on the right side. The staggered upper and lower first air ports 541 make the temperature distribution inside the light source main body 52 more uniform, and form vortex air flow, so that it is merged into the annular gas flow channel, and then the heat is conducted to the outside. More specifically, the end of the light source body 52 is provided with a notch so that the air guiding portion 54 extends to the inside of the lamp cap, a second air opening 542 is provided below the first air opening 541, and the second air opening 542 faces the bottom of the inner side of the light source body 52 so that the temperature between the top and the bottom of the light source body 52 is balanced.
As shown in fig. 1 to 3, in order to further improve the heat dissipation efficiency of the heat dissipation assembly 2 for the hot air in the annular gas flow passage, in the embodiment, the heat dissipation assembly 2 includes a heat conduction substrate 21, a third fin group 22 connected to the inner side of the heat conduction substrate 21, a fourth fin group 23 connected to the outer side of the heat conduction substrate 21, and a fourth air blowing device 24 connected to the outer side of the heat conduction substrate 21 and blowing air toward the fourth fin group 23; the third set of fins 22 is located in the path of the annular gas flow path. The third fin group 22 located on the inner side absorbs heat generated by the light source main body 52, and transfers the heat to the fourth fin group 23 located on the outer side through the heat conducting substrate 21, and the fourth fin group 23 exchanges heat with the outside air through the air supplied by the fourth air supply device 24 to realize rapid cooling of the heat conducting substrate 21 and the fourth fin group 23. Specifically, the third fin group 22 includes, but not limited to, two heat sinks connected to two sides inside the heat conducting substrate 21 and located beside the second air blowing device 63, where the heat sinks include a plurality of fins and a heat conducting copper tube connecting the fins, and the air blowing device 63 can circulate through the gaps between the fins. The fourth fin group 23 is a heat sink connected to the outer side of the heat conducting substrate 21, the heat sink includes a plurality of fins and ring-shaped copper tubes connected to the fins, the ring-shaped copper tubes are arranged in parallel in the middle of the heat conducting substrate 21, the width of the ring-shaped copper tubes increases from the middle to both sides, and the heat dissipation efficiency of the ring-shaped gas flow channel at the center is increased.
As shown in fig. 1 to 3, for further pairing, the heat dissipation assembly 2 includes a heat conduction substrate 21 and a semiconductor refrigeration unit 25, the heat conduction substrate 21 is hermetically connected to the waterproof housing 1, the cold end of the semiconductor refrigeration unit 25 is connected to the inner side of the heat conduction substrate 21, and the hot end of the semiconductor refrigeration unit 25 faces the inside of the waterproof housing 1. The semiconductor refrigerating portion 25 includes a semiconductor refrigerating sheet 251, a refrigerating fin group 252 and a refrigerating air supply device 253, the hot end of the semiconductor refrigerating sheet 251 is connected to the heat conducting substrate 21, the cold end of the semiconductor refrigerating sheet 251 is connected to the bottom of the refrigerating fin group 252, and the top of the refrigerating fin group 252 is connected to the refrigerating air supply device 253. Including but not limited to specifically having, the semiconductor directly cools off the portion and is provided with four to distribute in four extreme angle departments of heat conduction base plate 21, be provided with temperature control device on the light source support 51 to the operation of each semiconductor refrigeration portion 25 of control can control the work of semiconductor refrigeration portion 25 respectively according to the instantaneous temperature height on the upper and lower side of light source main part 52 and the side of the left and right sides, in order to reach the temperature difference on the upper and lower side of light source main part 52 and the side of the left and right sides. The semiconductor refrigeration chip 251 is based on the peltier effect of the semiconductor, two ends with temperature difference are formed when power is supplied, the cold end absorbs heat, and the hot end emits heat. The cooling fin group 252 includes a bottom plate and a plurality of fins integrally connected to the bottom plate, the bottom plate is connected to the cold end of the semiconductor cooling fin 251, and the fins are connected to a cooling air supply device 253, i.e., an axial flow fan, and supply air from the bottom end of the waterproof housing 1 toward the inside, so as to blow cold air into the annular gas flow passage, thereby realizing rapid cooling of the flowing gas, and then rapidly cooling the light source main body 52 when the temperature is at the peak value. Since the third air supply device 53 is a blower fan, the blower fan can directly draw and blow the cold air generated by the semiconductor refrigeration parts 25 located at the left and right sides of the blower fan into the light source main body 52, thereby realizing rapid cooling of the light source subject with the highest temperature. By the scheme, rapid active cooling of the annular gas flow channel inside the waterproof shell 1 when the annular gas flow channel is at a temperature peak value can be realized, direct active cooling of the inside of the light source main body 52 can be realized, and the high-sealed lamp can work at an instantaneous high temperature.
As shown in fig. 1, 2 and 5, in order to further facilitate the installation and inspection of the optical assembly 4 and the light source assembly 5 under the waterproof casing 1 with high sealing performance, in this embodiment, a through hole 14 is formed in the waterproof casing 1 along the side surface adjacent to the annular gas flow channel, an installation portion 15 is formed in the inner wall of the waterproof casing 1, the optical assembly 4 and the light source assembly 5 are respectively disposed on an installation substrate 16, the installation substrate 16 is detachably connected to the installation portion 15, and a cover plate 17 is detachably and hermetically connected to the through hole 14. The mounting portion 15 includes a plurality of first fixed point positions 151 distributed along a radial direction of the waterproof case 1, and the mounting substrate 16 includes second fixed point positions 161 corresponding to distribution positions of the first fixed point positions 151, and the first fixed point positions 151 are detachably fitted and connected to the second fixed point positions 161. The waterproof housing 1 comprises two sub-housings 18 which are hermetically connected, and the connecting seams of the sub-housings 18 are connected with the through holes 14. Including but not limited to, specifically, the optical element includes a focusing assembly located at the upper part, which achieves the effect of adjusting the focal length by controlling the distance from the lens to the lens 3 through a motor and a transmission assembly, etc., and the focusing assembly is arranged on a separate mounting substrate 16; the optical elements include a prism assembly in the middle connecting various prisms, filters to a motor and drive assembly, the prism assembly being arranged on a separate mounting substrate 16 by electrically controlling the switching of the prisms and filters; the light source assembly 5 is integrally connected to the separate mounting substrate 16 through the light source holder 51. The particular shape of the through-hole 14 may allow passage of the teach assembly, the prism assembly and the light source assembly 5 at a set mounting position. Each mounting substrate 16 is provided with a plurality of support rods, and the support rods are provided with screw holes to form a second fixing point 161; the waterproof housing 1 is located inside the through hole 14 and is also provided with a plurality of support rods, the support rods are provided with screw holes to form a first fixing point 151, a plurality of first fixing point 151 are correspondingly arranged on the focusing assembly to form an installation part 15, and similarly, the prism assembly and the light source assembly 5 also have corresponding installation parts 15. The cover plate 17 is used for sealing and plugging the through hole 14, and particularly, the sealing and fixing are realized by matching an annular groove and an annular sealing strip which are arranged on the circumferential direction of the through hole 14 with an annularly arranged bolt screw hole on the cover plate 17. In order to facilitate the installation of the waterproof housing 1, particularly the sealed installation of the lens 3, the waterproof housing is formed by hermetically connecting two sub-housings 18, the through hole 14 is formed by splicing the sub-housings 18 on the left side and the right side, the sub-housings 18 are fixed in a matched mode through bolts and screw holes, the joint is filled with waterproof glue to achieve high sealing, the lens 3 is connected to an annular groove formed in the front end of the two sub-housings 18 to achieve fixing, and then the waterproof glue is filled to achieve sealing.
As shown in fig. 1, 2 and 5, in order to improve the efficiency of the waterproof housing 1 for auxiliary heat dissipation, in this embodiment, specifically, the waterproof housing 1 is made of an aluminum alloy, and the first fin group 11 and the second fin group 12 are integrally connected to the waterproof housing 1. Specifically, the first fin group 11 and the second fin group 12 are integrally formed inside and outside the waterproof housing 1 by using an aluminum alloy die casting process. More specifically, the left and right sub-housings 18 have the same shape and structure, and are provided with the first fin group 11 on the inner side and the second fin group 12 on the outer side. When the heat exchanger is used, the annular gas flow channel can directly exchange heat with the whole aluminum alloy shell, and can also be intensively transferred to the second fin group 12 through the first fin group 11, and the heat transfer between the first fin group 11 and the second fin group 12 is free of obstruction.
While the present invention has been described by way of examples, and not by way of limitation, other variations of the disclosed embodiments, as would be readily apparent to one of skill in the art, are intended to be within the scope of the present invention, as defined by the claims.