阅读说明：本技术 一种移动通信数据传输终端及系统 (Mobile communication data transmission terminal and system ) 是由 万静 徐明云 许豪 于 2021-08-06 设计创作，主要内容包括：本发明涉及移动通信技术领域,且公开了一种移动通信数据传输终端,包括外壳,所述外壳的安装有移动机构,所述移动机构包括卷轮,所述卷轮的内壁固定连接有摩擦环,所述卷轮的内部插接有内轮,所述滑块远离从动囊的一侧铰接有摆杆,所述摆杆远离滑块的一侧铰接有摩擦杆。该移动通信数据传输终端及系统,通过将两终端的数据接收器与数据传输器相对应,当只需要传输数据时,传输终端的控制模块使传输终端的电磁铁通电,电磁铁带动接收终端上的吸板移动,吸板带动数据传输器移动,数据传输器插接在数据接收器中,此时锁定块卡接在数据传输器外侧的锁定槽中,锁定块限制数据传输器移动,再通过数据接收器与传输机构的配合使用,从而达到了能选择性配对,数据传输安全的效果。(The invention relates to the technical field of mobile communication, and discloses a mobile communication data transmission terminal which comprises a shell, wherein a moving mechanism is arranged on the shell, the moving mechanism comprises a rolling wheel, the inner wall of the rolling wheel is fixedly connected with a friction ring, an inner wheel is inserted into the rolling wheel, one side of a sliding block, which is far away from a driven bag, is hinged with a swing rod, and one side of the swing rod, which is far away from the sliding block, is hinged with a friction rod. This mobile communication data transmission terminal and system, data receiver through with two terminals is corresponding with data transmission ware, when only needing transmission data, the control module at transmission terminal makes the electro-magnet circular telegram at transmission terminal, the electro-magnet drives the suction disc on the receiving terminal and removes, the suction disc drives data transmission ware and removes, data transmission ware is pegged graft in data receiver, locking block joint is in the locking groove in the data transmission ware outside this moment, locking block restriction data transmission ware removes, rethread data receiver uses with transmission device's cooperation, thereby reached and to mate by the selectivity, the effect that data transmission is safe.)

1. A mobile communication data transmission terminal comprising a housing (1), characterized in that: the movable mechanism (4) is installed to shell (1), movable mechanism (4) include reel (48), the inner wall fixedly connected with friction ring (41) of reel (48), interior round (42) is pegged graft to the inside of reel (48), the driven bag of inside fixedly connected with (43) of interior round (42), the outside fixedly connected with thrust spring (44) of driven bag (43), the inner wall sliding connection of interior round (42) has slider (45), one side that driven bag (43) were kept away from in slider (45) articulates there is pendulum rod (46), one side that slider (45) were kept away from in pendulum rod (46) articulates there is friction lever (47).

2. A mobile communication data transmission terminal according to claim 1, characterized in that: the friction rod (47) is connected to the inner part of the inner wheel (42) in a sliding way.

3. A mobile communication data transmission terminal according to claim 1, characterized in that: still including accomodating groove (6), accomodate groove (6) and set up at the top of shell (1), it has transmission device (3) to accomodate the inside grafting of groove (6), the inside sliding connection of transmission device (3) has moving mechanism (4), it has button (5) to accomodate the outside grafting of groove (6).

4. A mobile communication data transmission terminal according to claim 3, characterized in that: the conveying mechanism (3) comprises a conveying frame (315), the conveying frame (315) is inserted into the accommodating groove (6), the bottom of the conveying frame (315) is connected with a data transmitter (31) in a sliding mode, the bottom of the conveying frame (315) is fixedly connected with an electromagnet (32), the inner top of the conveying frame (315) is connected with a top plate (33) in a sliding mode, the inner portion of the conveying frame (315) is connected with a push rod (34) in a sliding mode, a reset spring (35) is sleeved on the outer side of the push rod (34), a transmission rod (36) is hinged to the left side of the push rod (34), a clamping block (37) is hinged to the left side of the transmission rod (36), a driving wheel (38) is welded to the left side of the conveying frame (315), a pressing rod (39) is inserted into the bottom of the conveying frame (315), and a locking block (310) is connected to the inner wall of the conveying frame (315) in a sliding mode, locking piece (310) are close to one side fixedly connected with pressure cell (311) of depression bar (39), the right side fixedly connected with initiative bag (312) of transmission frame (315), the inside sliding connection of transmission frame (315) has atmospheric pressure board (313), the right side fixedly connected with gasbag (314) of atmospheric pressure board (313), suction disc (316) have been cup jointed in the outside of data transmission ware (31), the bottom fixedly connected with buffer spring (317) of suction disc (316), the inner wall sliding connection of data transmission ware (31) has pendulum piece (318), the top of pendulum piece (318) articulates there is branch (319), the top of branch (319) articulates there is fixed block (320), the top of data transmission ware (31) is pegged graft and is had plug wire (321).

5. A mobile communication data transmission terminal according to claim 4, characterized in that: the data transmitter (31) is in transmission connection with the winding wheel (48) through a plug wire (312).

6. A mobile communication data transmission terminal according to claim 4, characterized in that: the inside fixedly connected with gyration spring of drive wheel (38), and drive wheel (38) and actuating lever (2) mesh mutually.

7. A mobile communication data transmission terminal according to claim 4, characterized in that: the pressure lever (39) is in transmission connection with the locking block (310) through a pull rope.

8. A mobile communication data transmission terminal according to claim 1, and now provides a mobile communication data transmission system, characterized in that: the method comprises the following steps:

the control module is used for controlling the connection of the data transmitter (31);

a data transmitter (31) for transmitting data;

a data receiver for receiving extrinsic data;

the automatic pairing unit is used for automatically pairing the connection terminals without manual selection;

and the processor is used for processing the data and prompting the data transmission result.

Technical Field

The invention relates to the technical field of mobile communication, in particular to a mobile communication data transmission terminal and a system.

Background

The mobile communication is communication between moving bodies or between a moving body and a fixed body, one or two of the two communication parties need to be in motion, including land, sea and air mobile communication, the existing mobile communication terminal usually performs data transmission through Bluetooth and WIFI, the data transmission is easily interfered by an external magnetic field during transmission, the transmission speed is low, meanwhile, the distance between devices is easily influenced by the distance of a data line, and the connection is inconvenient.

Aiming at the defects of the prior art, the invention provides a mobile communication data transmission terminal and a mobile communication data transmission system, which can be automatically connected and paired, are convenient to connect, can automatically accommodate a data receiver, prevent the data receiver from being exposed outside, reduce pollution, can perform data transmission and reception in a single way, are safe in data transmission, can automatically adjust the transmission distance, are convenient to move, can automatically detect a data transmitter, and are stable in transmission.

Disclosure of Invention

In order to realize the purposes of automatic connection and pairing, convenient connection, automatic storage of a data receiver, prevention of pollution of the data receiver, selective pairing, safe data transmission, automatic adjustment of transmission distance, convenient movement, automatic detection of a data transmitter and stable transmission, the invention provides the following technical scheme: the utility model provides a mobile communication data transmission terminal, includes the shell, the installation of shell moving mechanism, moving mechanism includes the rolling wheel, the inner wall fixedly connected with friction ring of rolling wheel, the inside of rolling wheel is pegged graft and is had interior round, the driven bag of inside fixedly connected with of interior round, the outside fixedly connected with thrust spring of driven bag, the inner wall sliding connection of interior round has the slider, one side that driven bag was kept away from to the slider articulates there is the pendulum rod, one side that the slider was kept away from to the pendulum rod articulates there is the friction lever.

Preferably, the friction rod is slidably connected to the inside of the inner wheel.

As an optimization, the portable terminal device further comprises a storage groove, the storage groove is formed in the top of the shell, a transmission mechanism is inserted into the storage groove, a moving mechanism is connected to the transmission mechanism in a sliding mode, and a button is inserted into the outer side of the storage groove.

Preferably, the transmission mechanism comprises a transmission frame, the transmission frame is inserted into the receiving groove, the bottom of the transmission frame is connected with a data transmitter in a sliding manner, the bottom of the transmission frame is fixedly connected with an electromagnet, the inner top of the transmission frame is connected with a top plate in a sliding manner, the transmission frame is connected with a top rod in a sliding manner, the outer side of the top rod is sleeved with a reset spring, the left side of the top rod is hinged with a transmission rod, the left side of the transmission rod is hinged with a clamping block, the left side of the transmission frame is welded with a driving wheel, the bottom of the transmission frame is inserted with a compression rod, the inner wall of the transmission frame is connected with a locking block in a sliding manner, one side of the locking block, which is close to the compression rod, is fixedly connected with a pressure bag, the right side of the transmission frame is fixedly connected with a driving bag, the inner part of the transmission frame is connected with a pressure plate in a sliding manner, and the right side of the pressure plate is fixedly connected with an air bag, the outer side of the data transmitter is sleeved with a suction plate, the bottom of the suction plate is fixedly connected with a buffer spring, the inner wall of the data transmitter is connected with a swinging block in a sliding mode, the top of the swinging block is hinged with a supporting rod, the top of the supporting rod is hinged with a fixing block, and the top of the data transmitter is inserted with a plug wire.

As optimization, the data transmitter is in transmission connection with the winding wheel through a plug wire.

Preferably, a rotary spring is fixedly connected inside the driving wheel, and the driving wheel is meshed with the driving rod.

Preferably, the pressure lever is in transmission connection with the locking block through a pull rope.

A mobile communication data transmission system comprising:

the control module is used for controlling the connection of the data transmitter;

the data transmitter is used for transmitting data;

a data receiver for receiving extrinsic data;

the automatic pairing unit is used for automatically pairing the connection terminals without manual selection;

and the processor is used for processing the data and prompting the data transmission result.

Advantageous effects

Compared with the prior art, the invention provides a mobile communication data transmission terminal and a system, which have the following beneficial effects:

1. this mobile communication data transmission terminal and system, data receiver through with two terminals is corresponding with data transmission ware, when only needing transmission data, the control module at transmission terminal makes the electro-magnet circular telegram at transmission terminal, the electro-magnet drives the suction disc on the receiving terminal and removes, the suction disc drives data transmission ware and removes, data transmission ware is pegged graft in data receiver, locking block joint is in the locking groove in the data transmission ware outside this moment, locking block restriction data transmission ware removes, rethread data receiver uses with transmission device's cooperation, thereby reached and to mate by the selectivity, the effect that data transmission is safe.

2. This mobile communication data transmission terminal and system, through extracting data transmission ware, reset spring drives the ejector pin and slides right, and the ejector pin drives the transfer line swing, and the transfer line drives the fixture block and slides to drive wheel inside, and the fixture block no longer restricts the drive wheel rotation this moment, and rethread drive wheel and rotary spring's cooperation is used to reach and to accomodate data receiver automatically, prevented the effect that data receiver pollutes.

3. This mobile communication data transmission terminal and system, through pressing the button, the initiative bag of button extrusion, the initiative bag makes from the bag inflation through the trachea, from the bag drive slider slip, the slider drives the pendulum rod swing, the pendulum rod drives the friction lever under the effect of interior wheel inner wall fulcrum and keeps away from the friction ring, mobile terminal this moment, the terminal drives data receiver and removes, data receiver drives data transmitter and removes data transmitter and drive the plug wire and remove, rethread plug wire and moving mechanism's cooperation is used, thereby reach ability automatically regulated transmission distance, remove convenient effect.

4. This mobile communication data transmission terminal and system moves through data transmission ware and drives the patchcord removal, and the patchcord drives moving mechanism and slides, and moving mechanism passes through the driving rope and drives the gas-pressure plate slip, and the gas-pressure plate extrudees the gasbag, and the gasbag passes through the inside atmospheric pressure increase of pipe messenger pressure bag, and the thrust that the locking piece was given to the pressure bag increases, and rethread locking piece uses with data transmission ware's cooperation to it is stable to have reached the connection, prevents the effect of dragging.

5. This mobile communication data transmission terminal and system, when too not hard up through data transmission ware, data transmission ware can not produce relative displacement with the suction disc, and the fixed block can not the joint in the fixed slot in the patchcord outside this moment, and when equipment removed, the reel drove the patchcord and breaks off with data transmission ware, and the suggestion needs to be changed data transmission ware to reached ability automated inspection data transmission ware, the stable effect of transmission.

Drawings

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

FIG. 2 is a schematic view of a portion of the structural transfer mechanism of the present invention;

FIG. 3 is an enlarged view of part A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a schematic diagram of a portion of a structured data transmitter in accordance with the present invention;

FIG. 6 is a schematic view of a portion of the moving mechanism of the present invention;

FIG. 7 is a schematic diagram of the system of the present invention.

In the figure: 1. a housing; 2. a drive rod; 3. a transport mechanism; 31. a data transmitter; 32. an electromagnet; 33. a top plate; 34. a top rod; 35. a return spring; 36. a transmission rod; 37. a clamping block; 38. a drive wheel; 39. a pressure lever; 310. a locking block; 311. a pressure bladder; 312. an active bladder; 313. a gas pressure plate; 314. an air bag; 315. a transmission rack; 316. a suction plate 316; 317. a buffer spring; 318. swinging a block; 319. a swing rod; 320. a fixed block; 321. plugging a wire; 4. a moving mechanism; 41. a friction ring; 42. an inner wheel; 43. a driven bladder; 44. a thrust spring; 45. a slider; 46. a swing rod; 47. a friction lever; 48. a winding wheel; 5. a button; 6. a receiving groove.

Detailed Description

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.

Example one

Referring to fig. 1 and 6, a mobile communication data transmission terminal includes a housing 1, a moving mechanism 4 is installed on the housing 1, the moving mechanism 4 includes a winding wheel 48, a friction ring 41 is fixedly connected to an inner wall of the winding wheel 48, an inner wheel 42 is inserted into the winding wheel 48, a driven capsule 43 is fixedly connected to the inner part of the inner wheel 42, a thrust spring 44 is fixedly connected to the outer side of the driven capsule 43, a sliding block 45 is slidably connected to the inner wall of the inner wheel 42, a swing rod 46 is hinged to a side of the sliding block 45 away from the driven capsule 43, a friction rod 47 is hinged to a side of the swing rod 46 away from the sliding block 45, the friction rod 47 is slidably connected to the inner part of the inner wheel 42, a button 5 is pressed, the button 5 presses a driving capsule 312, the driving capsule 312 expands the driven capsule 43 through an air pipe, the driven capsule 43 drives the sliding block 45 to slide, the sliding block 45 drives the swing rod 46 to swing, the swing rod 46 drives the friction rod 47 to move away from the friction ring 41 under the action of the inner wall pivot of the inner wheel 42, the connecting distance is convenient to adjust.

Example two

Referring to fig. 1-5, a mobile communication data transmission terminal comprises a housing 1, and further comprises a receiving slot 6, the receiving slot 6 is disposed at the top of the housing 1, a transmission mechanism 3 is inserted into the receiving slot 6, the transmission mechanism 3 comprises a transmission frame 315, the transmission frame 315 is inserted into the receiving slot 6, the bottom of the transmission frame 315 is slidably connected with a data transmitter 31, the data transmitter 31 is drivingly connected with a winding wheel 48 through an insertion line 321, the bottom of the transmission frame 315 is fixedly connected with an electromagnet 32, the inner top of the transmission frame 315 is slidably connected with a top plate 33, the inner of the transmission frame 315 is slidably connected with a top rod 34, the outer side of the top rod 34 is sleeved with a return spring 35, the left side of the top rod 34 is hinged with a transmission rod 36, the left side of the transmission rod 36 is hinged with a clamping block 37, the left side of the transmission frame 315 is welded with a driving wheel 38, the inner of the driving wheel 38 is fixedly connected with a rotary spring, the driving wheel 38 is engaged with the driving rod 2, the bottom of the transmission frame 315 is inserted with a pressure lever 39, the inner wall of the transmission frame 315 is connected with a locking block 310 in a sliding manner, one side of the locking block 310 close to the pressure lever 39 is fixedly connected with a pressure bag 311, the right side of the transmission frame 315 is fixedly connected with an active bag 312, the interior of the transmission frame 315 is connected with a pressure plate 313 in a sliding manner, the right side of the pressure plate 313 is fixedly connected with an air bag 314, the outer side of the data transmitter 31 is sleeved with a suction plate 316, the bottom of the suction plate 316 is fixedly connected with a buffer spring 317, the inner wall of the data transmitter 31 is connected with a swing block 318 in a sliding manner, the top of the swing block 318 is hinged with a support rod 319, the top of the support rod 319 is hinged with a fixed block 320, the top of the data transmitter 31 is inserted with an insertion wire 321, when only data transmission is needed, the control module of the transmission terminal energizes the electromagnet 32 of the transmission terminal, the electromagnet 32 drives the suction plate 316 on the receiving terminal to move, the suction plate 316 drives the data transmitter 31 to move, the data transmitter 31 is inserted into the data receiver of the conveying terminal, meanwhile, the locking block 310 is clamped in the locking groove in the outer side of the data transmitter 31, the locking block 310 limits the movement of the data transmitter 31 to complete automatic connection, meanwhile, the control module on the receiving terminal is not started, and the receiving terminal only receives data to guarantee the safety of data transmission.

EXAMPLE III

Referring to fig. 1-7, a mobile communication data transmission terminal comprises a housing 1, and further comprises a receiving slot 6, the receiving slot 6 is disposed at the top of the housing 1, a transmission mechanism 3 is inserted into the receiving slot 6, the transmission mechanism 3 comprises a transmission frame 315, a data receiver is disposed at the outer side of the transmission frame 315, a transmission frame 315 is inserted into the receiving slot 6, a data transmitter 31 is slidably connected to the bottom of the transmission frame 315, the data transmitter 31 is in transmission connection with a winding wheel 48 through a plug wire 321, a locking slot is disposed at the outer side of the data transmitter 31, an electromagnet 32 is fixedly connected to the bottom of the transmission frame 315, a top plate 33 is slidably connected to the inner top of the transmission frame 315, a push rod 34 is slidably connected to the inner side of the push rod 34, a return spring 35 is sleeved on the outer side of the push rod 34, a transmission rod 36 is hinged to the left side of the push rod 34, a fixture block 37 is hinged to the left side of the transmission rod 36, the left side of the transmission frame 315 is welded with a driving wheel 38, the inside of the driving wheel 38 is fixedly connected with a rotary spring, the driving wheel 38 is meshed with the driving rod 2, the bottom of the transmission frame 315 is inserted with a pressure rod 39, the pressure rod 39 is connected with a locking block 310 through a pull rope, the inner wall of the transmission frame 315 is connected with the locking block 310 in a sliding manner, one side of the locking block 310 close to the pressure rod 39 is fixedly connected with a pressure bag 311, the right side of the transmission frame 315 is fixedly connected with an active bag 312, the inside of the transmission frame 315 is connected with a pressure plate 313 in a sliding manner, the right side of the pressure plate 313 is fixedly connected with an air bag 314, the air bag 314 is connected with the pressure bag 311 through a conduit, the outer side of the data transmitter 31 is sleeved with a suction plate 316, the bottom of the suction plate 316 is fixedly connected with a buffer spring 317, the inner wall of the data transmitter 31 is connected with a swinging block 318 in a sliding manner, the top of the swinging block 318 is hinged with a support rod 319, the middle position of the support rod 319 is hinged on the inner wall of the data transmitter 31, the top of branch 319 articulates there is fixed block 320, peg graft at the top of data transmission ware 31 has patch cord 321, the fixed slot has been seted up to the outside of patch cord 321, the inside sliding connection of transmission device 3 has moving mechanism 4, the inside fixedly connected with clockwork spring of moving mechanism 4, make it can automatic rolling patch cord 321, moving mechanism 4 includes reel 48, reel 48 passes through the driving rope and is connected with pneumatic plate 313 transmission, the inner wall fixedly connected with friction ring 41 of reel 48, the inside of reel 48 is pegged graft and is had interior wheel 42, the inside fixedly connected with driven bag 43 of interior wheel 42, the outside fixedly connected with thrust spring 44 of driven bag 43, the inner wall sliding connection of interior wheel 42 has slider 45, the one side that slider 45 kept away from driven bag 43 articulates there is the pendulum rod 46, the one side that slider 45 was kept away from to pendulum rod 46 articulates there is friction lever 47, the sliding connection of friction lever 47 is in the inside of interior wheel 42, the right side sliding connection of shell 1 has button 5.

A mobile communication data transmission system comprising:

a control module for controlling the data transmitter connection 31;

a data transmitter 31 for transmitting data;

a data receiver for receiving extrinsic data;

the automatic pairing unit is used for automatically pairing the connection terminals without manual selection;

and the processor is used for processing the data and prompting the data transmission result.

The working principle is that when data transmission is needed, the driving rod 2 is pushed to ascend, the driving rod 2 drives the driving wheel 38 to rotate, the driving wheel 38 drives the transmission frame 315 to rotate, the transmission frame 315 enables the data receiver and the data transmitter 31 on the outer side to rotate to the top, at the moment, the data receivers of two sets of equipment terminals correspond to the data transmitter 31, when only data transmission is needed, the control module of the transmission terminal enables the electromagnet 32 of the transmission terminal to be electrified, the electromagnet 32 moves through the suction plate 316 on the data transmitter 31 of the receiving terminal, the data transmitter 31 is inserted into the data receiver on the outer side of the transmission frame 315 of the transmission terminal, the data transmitter 31 drives the top plate 33 to ascend, the top plate 33 drives the ejector rod 34 to slide leftwards, the ejector rod 34 drives the driving rod 36 to swing, the driving rod 36 drives the clamping block 37 to be clamped in the clamping opening, the clamping block 37 limits the driving wheel 38 to rotate, and the locking block 310 is clamped in the locking groove on the outer side of the data transmitter 31, the locking block 310 limits the movement of the data transmitter 31 to complete automatic connection, and at the same time, the control module on the receiving terminal is not started, the receiving terminal only receives data to ensure the safety of data transmission, at this time, the automatic pairing unit completes automatic pairing to perform data transmission, when the position of the receiving terminal needs to be moved in the transmission process, the button 5 is pressed, the button 5 extrudes the driving bag 312, the driving bag 312 expands the driven bag 43 through the air pipe, the driven bag 43 drives the sliding block 45 to slide, the sliding block 45 drives the swing rod 46 to swing, the swing rod 46 drives the friction rod 47 to be far away from the friction ring 41 under the action of the inner wall fulcrum of the inner wheel 42, at this time, the data receiver on the mobile terminal transmission frame 315 moves, the data receiver drives the data transmitter 31 to move, the data transmitter 31 drives the plug wire 321 to move, the plug wire 321 drives the rolling wheel 48 to rotate, the rolling wheel 48 makes the plug wire 321 extend, when the terminal moves to the desired position, when the push button 5 is released, when the plug wire 321 is pulled, the plug wire 321 drives the rolling wheel 48 to descend, the rolling wheel 48 slides, the rolling wheel 48 drives the air pressure plate 313 to slide through the transmission rope, the air pressure plate 313 presses the air bag 314, the air pressure in the pressure bag 311 is increased through the guide pipe by the air bag 314, the thrust force given to the locking block 310 by the pressure bag 311 is increased, the limiting force given to the data transmitter 31 by the locking block 310 is increased, the plug wire 321 is ensured not to be separated from the data receiver when being pulled, the transmission is stable, the pressure rod 39 is pressed after the transmission is completed, the pressure rod 39 drives the locking block 310 to be away from the locking groove through the pulling rope, at this moment, the data transmitter 31 is pulled out, the reset spring 35 is pulled out to drive the ejector rod 34 to slide rightwards, the ejector rod 34 drives the transmission rod 36 to swing, the fixture block 36 drives the fixture block 37 to slide towards the inside of the driving wheel 38, at this moment, the fixture block 37 does not limit the rotation of the driving wheel 38 any more, drive wheel 38 drives transmission frame 315 gyration under the effect of inside gyration spring, transmission frame 315 drives data receiver and data transmitter 31 and rotates to inside the shell 1, reduce the pollution of data receiver and data transmitter 31, when data transmitter 31 is too not hard up, data transmitter 31 can not produce relative displacement with suction disc 316, fixed block 320 can not joint in the fixed slot in the patchcord 321 outside this moment, when equipment removed, reel 48 drives patchcord 321 and data transmitter 31 disconnection, the suggestion needs to be changed data transmitter 31, guarantee that data transmission is stable.

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.