阅读说明：本技术 一种内科临床多功能训练装置 (Clinical multi-functional trainer of internal medicine ) 是由 陈应兰 周婧 刘丽 于 2020-08-24 设计创作，主要内容包括：本发明公开了一种内科临床多功能训练装置,包括支腿、腿支撑板、中间板和背支撑板,所述中间板下表面焊接有支腿,所述中间板一侧通过连接轴A安装有腿支撑板,所述中间板另一侧通过连接轴B安装有背支撑板,所述背支撑板末端安装有头枕,靠近所述背支撑板一侧的支腿外侧下端安装有液压安装板。本发明是一种内科临床多功能训练装置,能够通过液压缸的组件,方便的进行展开和折叠,以便训练患者的腰腿功能,还能够通过可转动装卸的扶手杆进行患者的保护,扶手杆末端的训练器材可以更换,能够训练患者的手部功能。(The invention discloses a clinical multifunctional training device for internal medicine, which comprises supporting legs, leg supporting plates, a middle plate and a back supporting plate, wherein the supporting legs are welded on the lower surface of the middle plate, the leg supporting plates are installed on one side of the middle plate through a connecting shaft A, the back supporting plate is installed on the other side of the middle plate through a connecting shaft B, a headrest is installed at the tail end of the back supporting plate, and a hydraulic installing plate is installed at the lower end of the outer side of the supporting leg close to one side of the back supporting. The invention relates to a clinical multifunctional training device for internal medicine, which can be conveniently unfolded and folded through a component of a hydraulic cylinder so as to train the waist and leg functions of a patient, can also be used for protecting the patient through a rotatably assembled and disassembled handrail rod, and training equipment at the tail end of the handrail rod can be replaced so as to train the hand functions of the patient.)

1. The utility model provides a clinical multi-functional trainer of internal medicine, includes landing leg (2), leg support board (3), intermediate lamella (5) and back of the body backup pad (9), its characterized in that: the utility model discloses a hydraulic mounting plate, including intermediate lamella (5) lower surface welding has landing leg (2), leg support board (3) are installed through connecting axle A (4) in intermediate lamella (5) one side, backup pad (9) are installed through connecting axle B (7) to intermediate lamella (5) opposite side, headrest (8) are installed to backup pad (9) end, are close to hydraulic mounting board (10) are installed to landing leg (2) outside lower extreme on one side of backup pad (9).

2. The multifunctional internal medicine clinical training device of claim 1, wherein: landing leg (2) are equipped with four altogether, and four landing legs (2) branch locate the position department at four angles of intermediate lamella (5) lower surface, landing leg (2) lower extreme is installed and is removed wheel (1), and removes wheel (1) and be equipped with four altogether.

3. The multifunctional internal medicine clinical training device of claim 1, wherein: landing leg (2) inboard is connected through reinforcing plate (12), and reinforcing plate (12) upper end installs stopper (11), stopper (11) are equipped with four altogether, and four stoppers (11) branch locate the position department at four angles of reinforcing plate (12) upper surface, be provided with storing box (13) in the middle of stopper (11).

4. The multifunctional internal medicine clinical training device of claim 1, wherein: rotation axis (6) are all installed at both ends around intermediate lamella (5), and rotation axis (6) are equipped with four, two altogether rotation axis (6) are a set of, and every group rotation axis (6) symmetric distribution is on the surface of intermediate lamella (5), axle sleeve (14) have been cup jointed in rotation axis (6) outside, handrail post (16) are installed to axle sleeve (14) upper end, and handrail post (16) top on axle sleeve (14) on the same face is connected through bar (17), and bar (17) deviate from the one end of back of the body backup pad (9) and install installed part (18), and installed part (18) end installs grip training appearance (19).

5. The multifunctional internal medicine clinical training device of claim 4, wherein: be close to one side that axis of rotation (6) of one side of backing plate (9) is close to backing plate (9) is provided with stop collar (15), connecting rod (21) are installed in stop collar (15) outside, and connecting rod (21) end installs pulling handle (22), spring (20) have been cup jointed in the connecting rod (21) outside, and spring (20) end installs spring fixed plate (23), spring fixed plate (23) welding is in intermediate lamella (5) surface.

6. The multifunctional internal medicine clinical training device of claim 1, wherein: hydraulic oil pump (29) are installed to one side that hydraulic pressure mounting panel (10) upper end is close to landing leg (2), pneumatic cylinder axis of rotation (24) is installed to one side that deviates from landing leg (2) in hydraulic pressure mounting panel (10) upper end, and pneumatic cylinder axis of rotation (24) upper end installs pneumatic cylinder (25), pneumatic cylinder (25) inside slidable mounting has piston rod (26), backplate axis of rotation (27) are installed to piston rod (26) end, and install backplate installed part (28) on backplate axis of rotation (27), backplate installed part (28) welding is at backup pad (9) lower surface.

7. The multifunctional internal medicine clinical training device of claim 1, wherein: spacing round mounting panel (34) are all installed at both ends around connecting axle A (4) and connecting axle B (7), install spacing round B (33) between spacing round mounting panel (34) of connecting axle A (4) lower extreme, install spacing round A (30) between spacing round mounting panel (34) of connecting axle B (7) lower extreme, connect through cable wire (32) in spacing round A (30) and spacing round B (33) outside, connecting piece (31) are installed to cable wire (32) one end, and go up connecting piece (31) welding at backup pad (9) lower surface, connecting piece (35) under connecting piece (32) other end is installed, and connecting piece (35) welding is at leg backup pad (3) lower surface down.

Technical Field

The invention relates to the technical field of multifunctional training devices for internal medicine, in particular to a clinical multifunctional training device for internal medicine.

Background

At present, a plurality of patients are troubled by the medical diseases, the physical exercise capacity and coordination capacity of the patients are reduced due to the long-term illness of the medical diseases, and normal life is influenced, so that the key point of the rehabilitation training of the medical department is physical training, and at present, a plurality of hospitals are equipped with related treatment equipment, so that the training and the rehabilitation of the limbs of the patients are helped to a certain extent, but still have a plurality of improved spaces.

After a large number of searches, the following results are obtained: chinese utility model patent: application No. (CN 201821197111.6), publication No. (CN 209220848U) neurology training device and neurology equipment: the utility model provides a department of neurology trainer and department of neurology equipment belongs to medical apparatus field. This department of neurology trainer's stand fixed connection is in the base, and a plurality of through-holes that the axial interval along the stand set up are seted up to the stand, and one in a plurality of through-holes is worn to locate by the loose axle, and the rolling disc is connected to the one end of loose axle, the axial of rolling disc and the axial direction parallel of loose axle. The side of the outer ring of the rotating disc is connected with a hanging rope, the two ends of the hanging rope are respectively connected with a first leg placing part and a second leg placing part, and the first leg placing part and the second leg placing part are symmetrically arranged on the two sides of the stand column. The first foot placing part and the second foot placing part are both provided with a plurality of massage balls, and the massage balls are arranged on one side, used for fitting the feet, of the first foot placing part and the second foot placing part. Above-mentioned department of neurology trainer helps department of neurology patient's shank to resume, shortens recovery time. The neurology equipment comprising the neurology training device is simple to use, convenient and fast.

Firstly, most of the existing devices have single functions, are not humanized enough when being used, and have slow recovery effect for patients, and on the other hand, most of the rehabilitation training devices need to be used under the special coordination of medical personnel, and few patients can use the devices independently, so that heavy working pressure is brought to the nervous medical personnel to a great extent. Therefore, we provide a clinical multi-functional trainer of internal medicine, can satisfy present internal medicine operation requirement, can let patient's whole body can both obtain the training, and the instrument of hand training can be dismantled, changes other hand trainer.

Disclosure of Invention

The invention aims to provide a clinical multifunctional training device for internal medicine, which has the advantages that the whole body of a patient can be trained, a training tool of a hand can be detached, other training devices can be replaced, and the hand can be trained in a reinforced mode.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a clinical multi-functional trainer of internal medicine, includes landing leg, leg support board, intermediate lamella and back of the body backup pad, the welding has the landing leg under the intermediate lamella, the leg support board is installed through connecting axle A in intermediate lamella one side, the back of the body backup pad is installed through connecting axle B to the intermediate lamella opposite side, the headrest is installed to back of the body backup pad end, is close to hydraulic pressure mounting panel is installed to the landing leg outside lower extreme of back of the body backup pad one side.

Preferably, the landing leg is equipped with four altogether, and four landing legs branch locates the position department at four angles of intermediate lamella lower surface, the landing leg lower extreme is installed and is removed the wheel, and removes the wheel and be equipped with four altogether.

Preferably, the landing leg inboard is connected through the reinforcing plate, and installs the stopper in the reinforcing plate upper end, the stopper is equipped with four altogether, and four stoppers divide the position department of locating four angles on the reinforcing plate upper surface, be provided with the storing box in the middle of the stopper.

Preferably, the axis of rotation is all installed at both ends around the intermediate lamella, and the axis of rotation is equipped with four altogether, two the axis of rotation is a set of, and every group axis of rotation symmetric distribution is on the surface of intermediate lamella, the axle sleeve has been cup jointed in the axis of rotation outside, the handrail post is installed to the axle sleeve upper end, and the handrail post top on the axle sleeve on the same face passes through the bar connection, and the bar deviates from the one end of back of the body backup pad and installs the installed part, and the installed part end installs the grip training appearance.

Preferably, the rotating shaft close to one side of the back support plate is provided with a limiting sleeve close to one side of the back support plate, the connecting rod is installed outside the limiting sleeve, the pulling handle is installed at the tail end of the connecting rod, the spring is sleeved on the outer side of the connecting rod, the spring fixing plate is installed at the tail end of the spring, and the spring fixing plate is welded on the outer surface of the middle plate.

Preferably, the hydraulic oil pump is installed to one side that hydraulic pressure mounting panel upper end is close to the landing leg, the pneumatic cylinder axis of rotation is installed to one side that deviates from the landing leg in hydraulic pressure mounting panel upper end, and installs the pneumatic cylinder on the pneumatic cylinder axis of rotation, the inside slidable mounting of pneumatic cylinder has the piston rod, the backplate axis of rotation is installed to the piston rod end, and installs the backplate installed part on the backplate axis of rotation, the welding of backplate installed part is at back of the body backup pad lower surface.

Preferably, spacing round mounting panels are all installed at both ends around connecting axle A and the connecting axle B, install spacing round B between the spacing round mounting panel of connecting axle A lower extreme, install spacing round A between the spacing round mounting panel of connecting axle B lower extreme, connect through the cable wire in spacing round A and the spacing round B outside, connecting piece is installed to cable wire one end, and goes up the connecting piece welding and at back of the body backup pad lower surface, the connecting piece is installed down to the cable wire other end, and the connecting piece welding is at leg backup pad lower surface down.

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

1. the invention achieves the effects of conveniently turning over the handrail rods and replacing the grip strength training instrument at the tail ends of the handrail rods by arranging the handrail columns and the handrail rods, when the grab bar needs to be put down, the limiting sleeve is separated from the rotating shaft by pulling the pulling handle outwards, the handrail columns and the handrail rods can be turned over, and the handrail columns and the handrail rods can be moved away so that a patient can enter the device, when in use, the pulling handle is pulled outwards to separate the limiting sleeve from the rotating shaft, can turn handrail post and bar, turn over handrail post and bar meeting initial position, can use, the patient can carry out the training of hand through the terminal grip training appearance of bar, can also demolish the terminal grip training appearance of bar through the installed part, changes other trainer to carry out the enhancement training of hand.

2. The invention achieves the effect of conveniently placing certain necessities by arranging the reinforcing plate and the storage box, the reinforcing plate can reinforce the supporting legs, so that the supporting legs cannot be dislocated, the stable placement of the whole equipment is ensured, the storage box can be more stable through the limiting block, equipment necessary for training can be stored in the storage box, certain rescue necessities can be stored, and the landing leg can be taken out and used in time when an accident happens to a patient.

3. The invention achieves the effect of enabling the leg supporting plate and the back supporting plate of the equipment to rotate and training the legs and the waist and the back of a patient by arranging the structures such as the hydraulic cylinder and the like, when the equipment needs to be unfolded, the hydraulic oil pump outputs the equipment, the piston connecting rod is retracted, the leg supporting plate and the back supporting plate rotate through the rotation of the rotating shaft of the hydraulic cylinder and the rotating shaft of the back plate until the leg supporting plate and the back supporting plate rotate to be in the same straight line with the middle plate, so that the patient can keep a lying posture, when the training needs to be trained, the hydraulic oil pump outputs the equipment to push the piston connecting rod out, the leg supporting plate and the back supporting plate rotate through the rotation of the rotating shaft of the hydraulic cylinder and the rotating shaft of the back plate until the leg supporting plate and the back supporting plate rotate to the initial position, the posture of the patient is adjusted through the rotation, can make leg backup pad and back of the body backup pad can be more stable through the cable wire, and guarantee synchronous rotation, make the patient use more comfortable.

Drawings

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

FIG. 2 is a schematic view of the present invention in an expanded front view configuration;

FIG. 3 is a front view of the structure of the handrail column and the handrail rod of the present invention;

FIG. 4 is a schematic diagram of the main structure of the stop collar and the connecting rod of the present invention;

FIG. 5 is a front view structural schematic diagram of the hydraulic cylinder and hydraulic oil pump of the present invention;

FIG. 6 is a schematic front view of the structure of the steel cable of the present invention.

In the figure: 1. a moving wheel; 2. a support leg; 3. a leg support plate; 4. connecting the shaft A; 5. a middle plate; 6. a rotating shaft; 7. a connecting shaft B; 8. a headrest; 9. a back support plate; 10. a hydraulic mounting plate; 11. a limiting block; 12. a reinforcing plate; 13. a storage box; 14. a shaft sleeve; 15. a limiting sleeve; 16. an armrest post; 17. a grab rail; 18. a mounting member; 19. a grip strength training instrument; 20. a spring; 21. a connecting rod; 22. pulling the handle; 23. a spring fixing plate; 24. a hydraulic cylinder rotating shaft; 25. a hydraulic cylinder; 26. a piston connecting rod; 27. a back plate rotating shaft; 28. a back panel mount; 29. a hydraulic oil pump; 30. a limiting wheel A; 31. an upper connecting piece; 32. a steel cord; 33. a limiting wheel B; 34. a limiting wheel mounting plate; 35. and a lower connecting piece.

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.

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

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

Referring to fig. 1 and fig. 2, an embodiment of the present invention: a clinical multifunctional training device for internal medicine comprises supporting legs 2, leg supporting plates 3, a middle plate 5 and a back supporting plate 9, wherein the lower surface of the middle plate 5 is welded with the supporting legs 2, the number of the supporting legs 2 is four, the four supporting legs 2 are respectively arranged at the positions of four corners of the lower surface of the middle plate 5, the lower ends of the supporting legs 2 are provided with moving wheels 1, the number of the moving wheels 1 is four, equipment can move through the four moving wheels 1, the equipment is convenient to use, the inner sides of the supporting legs 2 are connected through reinforcing plates 12, the supporting legs 2 can be ensured to be in the vertical direction due to the design of the reinforcing plates 12, the equipment is more stable and safer, the upper ends of the reinforcing plates 12 are provided with limiting blocks 11, the number of the limiting blocks 11 is four, the four limiting blocks 11 are respectively arranged at the positions of the upper surface of the reinforcing plates 12, a storage box 13 is arranged in the middle of the, the multifunctional medical support can also store some rescue necessities, and can be taken out and used in time when a patient has an accident, the leg support plate 3 is installed on one side of the middle plate 5 through the connecting shaft A4, the back support plate 9 is installed on the other side of the middle plate 5 through the connecting shaft B7, the headrest 8 is installed at the tail end of the back support plate 9, and the hydraulic installation plate 10 is installed at the lower end of the outer side of the leg 2 close to one side of the back support plate 9.

Referring to fig. 1 and 3, an embodiment of the present invention: a clinical multi-functional trainer of internal medicine, including landing leg 2, the leg backup pad 3, intermediate lamella 5 and back of the body backup pad 9, the lower surface welding of intermediate lamella 5 has landing leg 2, axis of rotation 6 is all installed at both ends around the intermediate lamella 5, and axis of rotation 6 is equipped with four altogether, two axis of rotation 6 are a set of, every group axis of rotation 6 symmetric distribution is on the surface of intermediate lamella 5, axle sleeve 14 has been cup jointed to the axis of rotation 6 outside, axle sleeve 14 upper end is installed handrail post 16, handrail post 16 top on the axle sleeve 14 on the same face is connected through handrail rod 17, and handrail rod 17 deviates from the one end of back of the body backup pad 9 and is installed part 18, and the terminal grip trainer 19 of installing part 18 is installed, the patient can carry out the training of hand through the grip trainer 19 of the terminal handrail rod 17, can also remove the grip trainer 19 of handrail rod 17, so as to carry out the enhancement training of hand, intermediate lamella 5 one side is installed leg support plate 3 through connecting axle A4, and intermediate lamella 5 opposite side is installed back of the body backup pad 9 through connecting axle B7, and back of the body backup pad 9 end is installed headrest 8, and the hydraulic pressure mounting panel 10 is installed to the landing leg 2 outside lower extreme that is close to back of the body backup pad 9 one side.

Referring to fig. 1 and 4, an embodiment of the present invention is shown: a clinical multi-functional trainer of internal medicine, including landing leg 2, leg support plate 3, intermediate lamella 5 and back support plate 9, the lower surface welding of intermediate lamella 5 has landing leg 2, leg support plate 3 is installed through connecting axle A4 in intermediate lamella 5 one side, back support plate 9 is installed through connecting axle B7 in intermediate lamella 5 opposite side, one side that is close to back support plate 9 of axis of rotation 6 of one side of back support plate 9 is provided with stop collar 15, connecting rod 21 is installed to the stop collar 15 outside, and connecting rod 21 end installs pulling handle 22, the connecting rod 21 outside has cup jointed spring 20, and spring 20 end installs spring fixed plate 23, spring fixed plate 23 welds the surface in intermediate lamella 5, when needing to put down bar 17, through pulling handle 22 outwards, make stop collar 15 break away from axis of rotation 6, can turn handrail post 16 and bar 17, can remove handrail post 16 and bar 17 to the patient enters into the equipment top, when needs use, again with pulling handle 22 outwards pulling, make stop collar 15 break away from the axis of rotation, can turn handrail post 16 and bar 17, turn handrail post 16 and bar 17 and can the initial position, can use, back of the body backup pad 9 end is installed headrest 8, the hydraulic pressure mounting panel 10 is installed to the landing leg 2 outside lower extreme that is close to back of the body backup pad 9 one side

Referring to fig. 1 and 5, an embodiment of the present invention: a clinical multi-functional trainer of internal medicine, including landing leg 2, leg supporting plate 3, intermediate lamella 5 and back supporting plate 9, lower surface welding of intermediate lamella 5 has landing leg 2, leg supporting plate 3 is installed through connecting axle A4 in one side of intermediate lamella 5, back supporting plate 9 is installed through connecting axle B7 in the opposite side of intermediate lamella 5, headrest 8 is installed at the end of back supporting plate 9, hydraulic mounting plate 10 is installed at the lower end of the outside of landing leg 2 near one side of back supporting plate 9, hydraulic oil pump 29 is installed at one side of the upper end of hydraulic mounting plate 10 near landing leg 2, hydraulic cylinder rotating shaft 24 is installed at one side of the upper end of hydraulic mounting plate 10 far away from landing leg 2, and hydraulic cylinder 25 is installed at the upper end of hydraulic cylinder rotating shaft 24, piston connecting rod 26 is installed inside the hydraulic cylinder 25 in a, the back plate mounting piece 28 is welded on the lower surface of the back support plate 9, the leg support plate 3 and the back support plate 9 of the equipment can rotate through the design of structures such as the hydraulic cylinder 25 and the like, so that a patient can change between a sitting posture and a lying posture, the legs and the waist and the back of the patient can be trained, when deployment is required, output is provided by hydraulic oil pump 29, retracting piston rod 26, the leg support plate 3 and the back support plate 9 are rotated by the rotation of the hydraulic cylinder rotating shaft 24 and the back plate rotating shaft 27 until the rotation is stopped when the rotation is in the same straight line with the middle plate 5, so that the patient can keep the lying posture, and when training is needed, the output is performed by the hydraulic oil pump 29, the piston rod 26 is pushed out, and the leg support plate 3 and the back support plate 9 are rotated until the initial positions by the rotation of the cylinder rotating shaft 24 and the back plate rotating shaft 27.

Referring to fig. 1 and fig. 6, an embodiment of the present invention: a clinical multi-functional trainer of internal medicine, including landing leg 2, leg support plate 3, intermediate lamella 5 and back of the body backup pad 9, the lower surface welding of intermediate lamella 5 has landing leg 2, leg support plate 3 is installed through connecting axle A4 in intermediate lamella 5 one side, back of the body backup pad 9 is installed through connecting axle B7 in the opposite side of intermediate lamella 5, headrest 8 is installed to the back of the body backup pad 9 end, hydraulic pressure mounting panel 10 is installed to the landing leg 2 outside lower extreme that is close to one side of back of the body backup pad 9, spacing wheel mounting panel 34 is all installed at both ends around connecting axle A4 and connecting axle B7, install spacing wheel B33 between the spacing wheel mounting panel 34 of connecting axle A4 lower extreme, install spacing wheel A30 between the spacing wheel mounting panel 34 of connecting axle B7 lower extreme, spacing wheel A30 and spacing wheel B33 outside are connected through cable wire 32, upper, connecting piece 35 is installed down to the cable wire 32 other end, and connecting piece 35 welding is at leg support plate 3 lower surface down, and at leg support plate 3 and back of the body backup pad 9 pivoted in-process, through cable wire 32, can play spacing effect, makes leg support plate 3 and back of the body backup pad 9 can guarantee synchronous rotation, makes the patient use safer.

The working principle is as follows: the equipment can move through the moving wheel 1, when a patient needs to enter the upper part of the equipment, the limiting sleeve 15 is separated from the rotating shaft 6 by pulling the pulling handle 22 outwards, the handrail column 16 and the handrail rod 17 can be turned, the handrail column 16 and the handrail rod 17 can be moved away, after the patient sits on the equipment, the pulling handle 22 is pulled outwards, the limiting sleeve 15 is separated from the rotating shaft, the handrail column 16 and the handrail rod 17 can be turned to the initial position, the equipment can be used, the patient can carry out hand training through the grip strength training instrument 19 at the tail end of the handrail rod 17, the grip strength training instrument 19 at the tail end of the handrail rod 17 can be detached through the mounting part 18, other training devices can be replaced, so as to carry out hand strengthening training, the equipment can carry out hand strengthening training of the patient, and can also carry out leg and waist training through the leg supporting plate 3 and the back supporting plate 9, when the folding device needs to be unfolded, the hydraulic oil pump 29 outputs the folding device, the piston connecting rod 26 is retracted, the leg supporting plate 3 and the back supporting plate 9 rotate through the rotation of the hydraulic cylinder rotating shaft 24 and the back plate rotating shaft 27 until the folding device rotates to be in the same straight line with the middle plate 5, so that a patient can keep a lying posture, when the folding device needs to be folded, the hydraulic oil pump 29 outputs the folding device, the piston connecting rod 26 is pushed out, the leg supporting plate 3 and the back supporting plate 9 rotate through the rotation of the hydraulic cylinder rotating shaft 24 and the back plate rotating shaft 27 until the folding device rotates to the initial position, and therefore the working flow of the whole device is completed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.