阅读说明：本技术 一种广角式建筑智能化可视对讲装置 (Wide-angle intelligent building visual intercom device ) 是由 陈浩 陈乐乐 张佶 于 2021-07-13 设计创作，主要内容包括：本发明涉及对讲装置技术领域,具体为一种广角式建筑智能化可视对讲装置。所述底部安装板由螺钉固定在放置外壳的下端一侧,其中对讲装置放置在放置外壳的内部一侧,所述增距板由螺钉对称固定在对讲装置的两端,其中联动杆一端贯穿放置外壳的一端设置,通过对本实用的设置,可使得对讲装置具备外壳保护能力,进而可以表面在对对讲装置不进行使用时,防止外界杂质对对讲装置造成污染,进而影响到人员对对讲装置的正常使用；本实用中,对讲装置采用的是广角式摄像头,进而在视频当中,摄像头的摄像范围可达到一百八十度,进而便于两位或多位对讲装置使用者之间的沟通。(The invention relates to the technical field of intercom devices, in particular to a wide-angle intelligent building visual intercom device. The bottom mounting plate is fixed on one side of the lower end of the placing shell through screws, the intercom device is placed on one side of the interior of the placing shell, the distance increasing plates are symmetrically fixed at two ends of the intercom device through screws, one end of the linkage rod penetrates through one end of the placing shell, and through the arrangement of the intercom device, the intercom device has the shell protection capability, so that when the intercom device is not used, the situation that external impurities pollute the intercom device can be prevented, and the normal use of the intercom device by personnel is further influenced; in the utility model, the intercom device adopts the wide-angle camera, and then in the middle of the video, the camera scope of making a video recording can reach one hundred eighty degrees, and then be convenient for two or many intercommunication device users between communicate.)

1. The utility model provides an intelligent visual intercom device of wide angle formula building, is including placing shell (1), bottom mounting panel (2), intercom (3), range plate (4) and gangbar (5), its characterized in that: the bottom mounting plate (2) is fixed on one side of the lower end of the shell (1) by screws, the intercom device (3) is arranged on one side of the interior of the shell (1), the distance increasing plates (4) are symmetrically fixed on two ends of the intercom device (3) by screws, and one end of the linkage rod (5) penetrates through one end of the shell (1).

2. The wide-angle intelligent visual intercom device for buildings according to claim 1, characterized in that: the anti-theft and anti-theft device is characterized in that integrally formed protruding discs (11) are symmetrically arranged on two sides of two ends of a placing shell (1), wherein the middle ends of the protruding discs (11) are provided with expansion screws (12) in a penetrating manner, one side of the middle end of the placing shell (1) is provided with a connecting column (13) in a penetrating manner, one end of the connecting column (13) is provided with an outer heat dissipation plate (14) in a penetrating manner, the outer heat dissipation plate (14) is embedded into one end of the placing shell (1) and is arranged inside, one end of the connecting column (13) is provided with an inner heat dissipation plate (15) in a penetrating manner, the lower end of the inner heat dissipation plate (15) is provided with an integrally formed positioning structure (16), the positioning structure (16) comprises a T-shaped plate (1601), an attaching plate (1602) and an arc leading-in plate (1603), and the T-shaped plate (1601), the attaching plate (1602) and the arc leading-in plate (1603) are of an integrally formed structure, rigging board (1602) symmetry is located the one end both sides of T shaped plate (1601), and wherein arc guide board (1603) is located the one end of rigging board (1602).

3. The wide-angle intelligent visual intercom device for buildings according to claim 2, characterized in that: place shell (1) one end bilateral symmetry and set up sealed pad (101) of gluing connection, wherein sealed pad (101) set up the material of adopting and be the rubber pad, the one end downside of placing shell (1) sets up blotter (102) of gluing connection, wherein blotter (102) set up the material of adopting and be the foam-rubber cushion, place the embedding of shell (1) upper end medial side and set up first magnet (103) of gluing connection, wherein place sealed lid (104) that shell (1) lower extreme set up the pivot and connect, the embedding of the one end medial side of sealed lid (104) sets up second magnet (105) of gluing connection, first magnet (103) are corresponding with the position of second magnet (105), and wherein the magnetic pole of first magnet (103) and second magnet (105) opposite face is opposite.

4. The wide-angle intelligent visual intercom device for buildings according to claim 1, characterized in that: bottom mounting panel (2) one end sets up live-rollers (21) that the pivot is connected, and wherein the side evenly sets up integrated into one piece's rolling teeth (22) in live-rollers (21) outer end, the side sets up welded connection's T shape control lever (23) in live-rollers (21) one end, bottom mounting panel (2) one end one side is run through and is set up screens board (24), and wherein screens board (24) one end is run through and is placed restriction piece (25), welding connection is carried out with bottom mounting panel (2) in restriction piece (25), and wherein the side sets up integrated into one piece's first kelly (26) in restriction piece (25) one end, the one end of screens board (24) is located between two rolling teeth (22).

5. The intelligent wide-angle building visual intercom device according to claim 4, wherein: the utility model discloses a clamp structure, including screens board (24), limiting block (2401), second card post (2402) that welded connection is set up to the length that screens board (24) one end was run through and is seted up built-in groove (2401), wherein the length that built-in groove (2401) was seted up is three-quarters of screens board (24) length, limiting block (25) have been placed to the middle-end of built-in groove (2401), the inner one side of screens board (24) sets up support spring (2403) wherein, support spring (2403) one end cover is located the inside of built-in groove (2401), wherein the other end cover of support spring (2403) is on first card post (26), the effective length of support spring (2403) is greater than the minimum interval between first card post (1) to second card post (2).

6. The wide-angle intelligent visual intercom device for buildings according to claim 1, characterized in that: heating panel (15) setting in the laminating of intercom (3) one end, wherein the lower extreme card of intercom (13) is between laminating board (1602), intercom (3) upper end one side sets up camera (31) of screw connection, and wherein camera (31) adopt wide angle formula camera, the inboard embedding of intercom (3) one end sets up gluey display screen (32) of connecting.

7. The wide-angle intelligent visual intercom device for buildings according to claim 1, characterized in that: the device is characterized in that a circular groove (41) is formed in the upper end of the distance increasing plate (4) in a penetrating mode, a rectangular groove (42) is formed in the middle end of the distance increasing plate (4) in a penetrating mode, an annular positioning cylinder (43) is placed on one side of the inner end of the rectangular groove (42), the annular positioning cylinder (43) is fixedly connected with the distance increasing plate (4) through screws, a power doing pipe (44) connected with the screws is arranged in the middle end of the annular positioning cylinder (43) in a penetrating mode, an extrusion bag (45) connected with glue is sleeved at the lower end of the power doing pipe (44), a limiting disc (46) connected with the power doing pipe (44) in a welding mode is arranged on one side of the inner end of the power doing pipe (44), and one end of a guide rod (47) is placed at the inner end of the power doing pipe (44).

8. The intelligent wide-angle building visual intercom device according to claim 7, wherein: guide bar (47) one end sets up integrated into one piece's arc roof (4701), and wherein the lower extreme of guide bar (47) sets up integrated into one piece's thickening piece (4702), the outside cover of thickening piece (4702) has leak protection ring (4703) of gluing the connection, and wherein the inner wall setting of leak protection ring (4703) laminating doing merit pipe (44), the material that leak protection ring (4703) adopted is the rubber ring.

9. The wide-angle intelligent visual intercom device for buildings according to claim 1, characterized in that: the quantity that gangbar (5) set up is two, and wherein two gangbars (5) all run through and place shell (1) setting, and the shape that gangbar (5) set up is L shape, gangbar (5) upper end sets up integrated into one piece's U-shaped apron (51), and wherein the one end downside of U-shaped apron (51) sets up integrated into one piece's compressing tightly post (52), compress tightly the inside that post (52) are located circular recess (41), set up integrated into one piece's extension bar (53) between gangbar (5), wherein the one end of extension bar (53) evenly sets up integrated into one piece's fixed point fixture block (54), fixed point fixture block (54) three degrees settings of inclining down, wherein the outer end of fixed point fixture block (54) sets up the arc slope, fixed point fixture block (54) and rolling tooth (22) intermeshing.

Technical Field

The invention relates to the technical field of intercom devices, in particular to a wide-angle intelligent building visual intercom device.

Background

The intelligent building is a product integrating modern science and technology. The technical foundation mainly comprises the modern building technology, the modern communication technology of the modern computer technology and the modern control technology. The intelligent building system is mainly used for building, expanding or rebuilding projects such as office buildings, commercial integrated buildings, culture, media, schools, stadiums, hospitals, traffic, industrial buildings and residential districts, and achieves the aims of high efficiency, safety, energy conservation, comfort, environmental protection and sustainable development through the configuration of intelligent functions of the buildings.

In order to ensure the building safety, the intelligent building is generally provided with a building intercom device at a building security door to carry out gating and intercom control at an entrance of the building security door, so that the entrance and exit of the building are conveniently controlled. The host computer of building intercom device is generally installed on the burglary-resisting door of every unit house gate or near the wall, because its host computer exposes outside, and general host computer lacks the protection architecture again, consequently receive external dust easily, the infringement of rainwater, thereby lead to intercom device impaired, be unfavorable for the use of host computer, and because the host computer is after long-time use, its surface is stained with remaining foul in the user use easily, cause other users to reuse easily and receive the hand and receive the pollution, be unfavorable for the use, intercom device and placing the shell if can carry out the high-speed joint simultaneously, then be favorable to resident or staff's use more.

Disclosure of Invention

The invention aims to provide a wide-angle intelligent visual intercom device for a building, so as to solve the problems in the process.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a wide angle formula building intelligent visual intercom device, the bottom mounting panel is placed the lower extreme one side of shell by the fix with screw, and wherein the intercom device is placed in the inside one side of placing the shell, the range plate is fixed at the both ends of intercom device by the screw symmetry, and wherein gangbar one end runs through the one end setting of placing the shell.

Preferably, place shell both ends bilateral symmetry and set up integrated into one piece's outstanding disc, wherein the outstanding disc middle-end runs through the expansion screw that sets up threaded connection, place shell middle-end one side and run through the holding post that sets up gluey connection, wherein the one end that holds the post sets up the outer radiating plate of screw connection, outer radiating plate is embedded into the inside setting of the one end of placing the shell, the one end that holds the post sets up the interior heating panel of screw connection, and wherein interior heating panel lower extreme sets up integrated into one piece's location structure, location structure is including T-shaped board, rigging board and arc leading-in board, and wherein T-shaped board, rigging board and arc lead-in board between the board are integrated into one piece's structure, the rigging board symmetric position is in the one end both sides of T-shaped board, and wherein the arc leading-in board is located the one end of rigging board.

Preferably, place shell one end bilateral symmetry and set up the sealed pad of gluing connection, wherein the material that the gasket set up the adoption is the rubber pad, the one end downside of placing the shell sets up the blotter of gluing connection, wherein the material that the blotter setting adopted is the foam-rubber cushion, place the embedding of shell upper end medial side and set up the first magnet of gluing connection, wherein place the sealed lid that the shell lower extreme set up the pivot and connect, the embedding of medial side sets up the second magnet of gluing connection in the one end of sealed lid, first magnet is corresponding with the position of second magnet, and wherein the magnetic pole of first magnet and second magnet opposite face is opposite.

Preferably, bottom mounting panel one end sets up the live-rollers that the pivot is connected, wherein rotates the even roll teeth that set up integrated into one piece of roller outer end medial side, the medial side sets up the T shape control lever of welding connection in live-rollers one end, bottom mounting panel one end one side is run through and is set up the screens board, and wherein screens board one end is run through and places the restriction piece, the restriction piece welds with the bottom mounting panel and connects, and wherein restriction piece one end medial side sets up integrated into one piece's first card post, one end of screens board is located between two roll teeth.

Preferably, the screens board one end is run through and is seted up built-in groove, and the length that wherein built-in groove was seted up is three-quarters of screens board length, the restriction piece has been placed to the middle-end in built-in groove, the inner one side of screens board sets up welded connection's second card post, and wherein the pot head of second card post has supporting spring, supporting spring is located the inside in built-in groove, and wherein the other pot head of supporting spring is on first card post, supporting spring's effective length is greater than the minimum interval between first card post to the second card post.

Preferably, the heat dissipation plate sets up in the laminating of intercom one end, and wherein the lower extreme card of intercom is between the laminating board, intercom upper end one side sets up the camera of screw connection, and wherein the camera adopts wide angle formula camera, the inboard embedding of intercom one end sets up the display screen of gluing the connection.

Preferably, the upper end of the distance increasing plate is provided with a circular groove in a penetrating manner, the middle end of the distance increasing plate is provided with a rectangular groove in a penetrating manner, an annular positioning cylinder is arranged on one side of the inner end of the rectangular groove and fixedly connected with the distance increasing plate through a screw, the middle end of the annular positioning cylinder is provided with a power tube connected with the screw in a penetrating manner, the lower end of the power tube is sleeved with an extrusion bag connected with glue, one side of the inner end of the power tube is provided with a limiting disc connected with the power tube in a welding manner, and one end of a guide rod is arranged at the inner end of the power tube.

Preferably, guide bar one end sets up integrated into one piece's arc roof, and wherein the lower extreme of guide bar sets up integrated into one piece's thickening piece, the outside cover of thickening piece has the leak protection ring of gluing connection, and wherein the inner wall setting of doing the merit pipe of leak protection ring laminating, the material that the leak protection ring adopted is the rubber ring.

Preferably, the quantity that the gangbar set up is two, and wherein two gangbars all run through and place the shell setting, and the shape that the gangbar set up is L shape, the gangbar upper end sets up integrated into one piece's U-shaped apron, and wherein the one end downside of U-shaped apron sets up integrated into one piece's the post that compresses tightly, it is located the inside of circular recess to compress tightly the post, set up integrated into one piece's extension bar between the gangbar, wherein the one end of extension bar evenly sets up integrated into one piece's fixed point fixture block, fixed point fixture block three degrees settings of inclining down, wherein the outer end of fixed point fixture block sets up the arc slope, fixed point fixture block and rolling teeth intermeshing.

Compared with the prior art, the invention has the beneficial effects that:

1. through the arrangement of the utility model, the intercom device has the shell protection capability, so that when the intercom device is not used, the pollution of external impurities to the intercom device can be prevented, and the normal use of the intercom device by personnel is further influenced;

2. in the utility model, the intercom device adopts a wide-angle camera, so that the camera shooting range of the camera can reach one hundred eighty degrees in video, thereby facilitating the communication between two or more intercom device users;

3. the placement shell can be used for rapidly placing and installing the intercom device, and meanwhile, the position of the intercom device can be fixed in the process of installing the intercom device, so that the work of an installer is facilitated, and the worker is provided with convenience in work.

Drawings

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

FIG. 2 is a perspective view of the placement housing of the present invention;

FIG. 3 is a schematic semi-sectional perspective view of the placement housing of the present invention;

FIG. 4 is a schematic left side view of the half-section of the placement housing of the present invention;

FIG. 5 is a front view of the bottom mounting plate of the present invention;

FIG. 6 is a perspective view of the intercom device of the present invention;

FIG. 7 is a schematic semi-sectional perspective view of a working tube of the present invention;

FIG. 8 is an enlarged view taken at A in FIG. 5 according to the present invention.

In the figure: the device comprises a placing shell 1, a sealing gasket 101, a buffer cushion 102, a first magnet 103, a sealing cover 104, a second magnet 105, a protruding disc 11, an expansion screw 12, a receiving column 13, an outer heat dissipation plate 14, an inner heat dissipation plate 15, a positioning structure 16, a T-shaped plate 1601, an attaching plate 1602, an arc-shaped lead-in plate 1603, a bottom mounting plate 2, a rotating roller 21, a rolling tooth 22, a T-shaped control rod 23, a clamping plate 24, an internal groove 2401, a second clamping column 2402, a supporting spring 2403, a limiting block 25, a first clamping column 26, an intercom device 3, a camera 31, a display screen 32, a distance increasing plate 4, a circular groove 41, a rectangular groove 42, an annular positioning cylinder 43, an acting pipe 44, a squeezing bag 45, a limiting disc 46, a guide rod 47, an arc-shaped top plate 4701, a thickening block 4702, a leakage-proof ring 4703, a linkage rod 5, a U-shaped cover plate 51, a pressing column 52, an adding 53 and a fixed point linkage block 54.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution: including placing shell 1, bottom mounting panel 2, intercom 3, range plate 4 and gangbar 5, bottom mounting panel 2 is fixed by the screw in the lower extreme one side of placing shell 1, and wherein intercom 3 places in the inside one side of placing shell 1, and range plate 4 is fixed at intercom 3's both ends by the screw symmetry, and wherein 5 one end of gangbar runs through the one end setting of placing shell 1.

Place shell 1 both ends bilateral symmetry and set up integrated into one piece's outstanding disc 11, wherein outstanding disc 11 middle-end runs through the expansion screw 12 that sets up threaded connection, place shell 1 middle-end one side and run through the support column 13 that connects that sets up gluey connection, wherein the one end that holds support column 13 sets up the outer heat dissipation board 14 of screw connection, outer heat dissipation board 14 is embedded into the inside setting of the one end of placing shell 1, the one end that holds support column 13 sets up the interior heat dissipation board 15 of screw connection, wherein interior heat dissipation board 15 lower extreme sets up integrated into one piece's location structure 16, location structure 16 is including T shaped plate 1601, rigging plate 1602 and arc leading-in board 1603, wherein T shaped plate 1601, be integrated into one piece's structure between rigging plate 1602 and the arc leading-in board 1603, rigging plate 1602 symmetric position is in the one end both sides of T shaped plate 1601, wherein arc leading-in board 1603 is located the one end of rigging plate 1602.

Place 1 one end bilateral symmetry of shell and set up sealed pad 101 of gluing connection, wherein the material that sealed pad 101 set up the adoption is the rubber pad, the one end downside of placing shell 1 sets up the cushion 102 of gluing connection, wherein the material that cushion 102 set up the adoption is the foam-rubber cushion, place the embedding of shell 1 upper end medial side and set up the first magnet 103 of gluing connection, wherein place the sealed lid 104 that the shell 1 lower extreme set up the pivot and connect, the medial side embedding sets up the second magnet 105 of gluing connection in the one end of sealed lid 104, first magnet 103 is corresponding with the position of second magnet 105, wherein the magnetic pole of first magnet 103 and second magnet 105 opposite face is opposite.

The sealing cover 104 can be sealed by the sealing gasket 101 and the cushion pad 102, so that dust can be prevented from entering the interior of the housing 1.

2 one ends of bottom mounting panel set up the live-rollers 21 that the pivot is connected, wherein the inboard evenly sets up integrated into one piece's rolling teeth 22 in the live-rollers 21 outer end, the inboard T shape control lever 23 that sets up welded connection in live-rollers 21 one end, 2 one end one sides of bottom mounting panel run through and set up screens board 24, wherein screens board 24 one end runs through places limiting block 25, limiting block 25 carries out welded connection with bottom mounting panel 2, wherein limiting block 25 one end medial side sets up integrated into one piece's first kelly 26, the one end of screens board 24 is located between two rolling teeth 22.

One end of the clamping plate 24 is provided with an internal groove 2401 in a penetrating manner, wherein the length of the internal groove 2401 is three quarters of the length of the clamping plate 24, the middle end of the internal groove 2401 is provided with a limiting block 25, one side of the inner end of the clamping plate 24 is provided with a second clamping column 2402 which is connected in a welding manner, one end of the second clamping column 2402 is sleeved with a supporting spring 2403, the supporting spring 2403 is positioned inside the internal groove 2401, the other end of the supporting spring 2403 is sleeved on the first clamping column 26, and the effective length of the supporting spring 2403 is larger than the minimum interval between the first clamping column 1 and the second clamping column 2.

The setting of heating panel 15 in the laminating of 3 one ends of intercom, wherein the lower extreme card of intercom 13 is between laminating board 1602, and 3 upper end one side of intercom sets up the camera 31 of screw connection, and wherein camera 31 adopts wide angle formula camera, and 3 one end medial quarter imbeds of intercom and sets up the display screen 32 of gluing the connection.

The upper end of the distance increasing plate 4 is provided with a circular groove 41 in a penetrating way, the middle end of the distance increasing plate 4 is provided with a rectangular groove 42 in a penetrating way through the circular groove 41, one side of the inner end of the rectangular groove 42 is provided with an annular positioning cylinder 43, the annular positioning cylinder 43 is fixedly connected with the distance increasing plate 4 through a screw, the middle end of the annular positioning cylinder 43 is provided with a work applying pipe 44 connected through the screw in a penetrating way, the lower end of the work applying pipe 44 is sleeved with an extrusion bag 45 connected through glue, one side of the inner end of the work applying pipe 44 is provided with a limiting disc 46 connected through welding, and one end of a guide rod 47 is arranged at the inner end of the work applying pipe 44.

The guide rod 47 slides in the working tube 44, under the action of the thickening block 4702 and the leakage-proof ring 4703, the guide rod 47 can extrude the air inside the working tube 44, the extrusion bag 45 expands along with the extrusion of the guide rod 47, and once the upper end of the guide rod 47 does not bear pressure, the air stored in the extrusion bag 45 pushes the guide rod 47, and at the moment, the locking column 52 leaves the inside of the circular groove 41.

Guide bar 47 one end sets up integrated into one piece's arc roof 4701, and wherein the lower extreme of guide bar 47 sets up integrated into one piece's thickening piece 4702, and the outside cover of thickening piece 4702 has the leak protection ring 4703 of gluing connection, and wherein the inner wall setting of leak protection ring 4703 laminating doing merit pipe 44, the material that leak protection ring 4703 adopted is the rubber ring.

The quantity that gangbar 5 set up is two, wherein two gangbars 5 all run through and place shell 1 setting, the shape that gangbar 5 set up is L shape, gangbar 5 upper end sets up integrated into one piece's U-shaped apron 51, wherein the one end downside of U-shaped apron 51 sets up integrated into one piece's the post 52 that compresses tightly, it is located the inside of circular recess 41 to compress tightly post 52, set up integrated into one piece's extension bar 53 between the gangbar 5, wherein extension bar 53's one end evenly sets up integrated into one piece's fixed point fixture block 54, fixed point fixture block 54 inclines three degrees settings down, wherein the outer end of fixed point fixture block 54 sets up the arc slope, fixed point fixture block 54 and rolling tooth 22 intermeshing

The working principle is as follows: the placing shell 1 can be fixed on a wall by utilizing the protruding disc 11 and the expansion screw 12, the first magnet 103 and the second magnet 105 can fix the position of the sealing cover 104, the sealing cover 104 can be sealed under the action of the sealing gasket 101 and the buffer pad 102, so that dust can be prevented from entering the placing shell 1, the inner heat dissipation plate 15 can be attached to the intercom device 3 to dissipate heat of the intercom device 3, the receiving column 13 has heat transfer performance, so that heat can be dissipated through the outer heat dissipation plate 14, the outer heat dissipation plate 14 is attached to the wall to enhance heat dissipation, when the intercom device 3 needs to be fixed in position, the intercom device 3 is pushed into the placing shell 1, and the intercom device 3 is pushed under the action of the arc-shaped guide-in plate 1603, move to between two attaching plates 1602 and press, when the intercom device 3 contacts the inner heat dissipation plate 15, stop pushing the intercom device 3, the pressing column 52 is located above the circular groove 41, further one end of the clamping plate 24 is pulled, the clamping plate 24 moves along the limiting block 25, then the supporting spring 2403 deforms, further the rotating roller 21 rotates through the T-shaped control rod 23, at the moment, the rolling teeth 22 rotate along with the rotating roller 21, further the rolling teeth 22 pull down the fixed-point clamping block 54, at the moment, the extension rod 53 moves downwards, then the two linkage rods 5 move downwards, under the movement of the linkage rods 5, the U-shaped cover plate 51 presses down the pressing column 52, the further pressing column 52 presses down the guide rod 47 through the arc-shaped top plate 4701, at the moment, the guide rod 47 slides inside the acting tube 44, further under the effect of thickening piece 4702 and leak protection ring 4703, guide bar 47 can extrude the inside air of power pipe 44 to along with the extrusion of guide bar 47, the phenomenon that extrusion package 45 can take place to expand, when compressing tightly post 52 is located the inside of circular recess 41, intercom 3's position is fixed and is accomplished, and it can to loosen screens board 24 this moment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.