Obstetric device for obstetrics and gynecology department
Technical Field
The invention relates to the technical field of medical instruments, in particular to a delivery assisting device for obstetrics and gynecology department.
Background
The obstetrics and gynecology department is one of four main subjects of clinical medicine, and is mainly used for researching the causes, pathology, diagnosis and prevention of diseases of female reproductive organs, physiological and pathological changes of pregnancy and delivery, prevention and treatment of high-risk pregnancy and dystocia, female reproductive endocrine, family planning, female health care and the like, deep research of medical basic theories such as modern molecular biology, oncology, genetics, reproductive endocrinology, immunology and the like and the progress of clinical diagnosis and treatment detection technology, so that the development of the obstetrics and gynecology science is widened and deepened, the important role is played for ensuring the health and reproductive health of women and preventing and treating various gynecological diseases, and the delivery assistance refers to a series of measures which are taken before and during labor so as to ensure that the fetus is delivered out of a maternal birth channel, and mainly comprises the care of a parturient, the careful observation of the labor course and guidance of the correct coordination of the progress of the labor course and.
The prior art has the following defects: when medical staff carries out emergency assistance on a pregnant woman, the obstetric table is required to be used, but the existing obstetric table cannot carry out accurate angle adjustment when the upper part of the body is lifted, so that the pregnant woman cannot put out a correct clinical posture according to actual conditions, rapid delivery is realized, meanwhile, the pregnant woman suffers great pain during delivery, most of the existing obstetric tables are not provided with a grabbing point and are not beneficial to the power of the pregnant woman, even the situation that the hands of the pregnant woman are grabbed by the existing obstetric table can occur, the pain can be increased, the labor is not concentrated, the delivery time is increased on the contrary, the production difficulty is caused, meanwhile, the existing obstetric table is simple in structure, the height can not be adjusted according to the height of a doctor and the delivery habit, the delivery work is carried out at the height suitable for the doctor to operate, a great deal of inconvenience is caused during clinical use, and the heights of the pregnant women are different, the height of the obstetric table needs to be adjusted, so that the postpartum pregnant woman can get on and off the bed more conveniently.
Therefore, it is necessary to invent a midwifery device for obstetrics and gynecology department.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a delivery assisting device for obstetrics and gynecology, by arranging the lifting mechanism, medical personnel can rotate the first crank to lift the movable plate, thereby adjusting the postures of the back and the upper half of the pregnant woman so as to be in labor and realize rapid delivery, and by arranging the lifting mechanism, the pregnant woman can rotate the second crank handle, the bed body is adjusted in ascending and descending height, so that the height of the bed body can be suitable for the operation habit of doctors, the delivering work can be carried out smoothly, meanwhile, the height of the bed can be adjusted according to the height of the lying-in woman, so that the lying-in woman can get on or off the bed more conveniently, and finally, the grip mechanism can provide a force-borrowing point for the lying-in woman, the labor of the lying-in woman can be concentrated during the childbirth, so that the childbirth time is reduced, and the problems in the background art are effectively solved.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a gynaecology and obstetrics is with practise midwifery device, includes the bed body, bed body top is provided with fly leaf and fixed plate, the fixed plate is connected with the bed body, the one end that the fly leaf is close to the fixed plate is connected with the bed body rotation, and bed body bottom is provided with raises the mechanism, it is used for controlling the fly leaf to rotate around fly leaf and fixed plate junction to raise the mechanism, both ends are provided with the guard plate respectively around the bed body, and both ends are provided with the rail guard respectively about the bed body, bed body bottom is equipped with the cabinet body. Through setting up guard plate and rail guard, can form the protection effectively on the both sides of the bed body and both sides, can effectively block pregnant woman's health, avoid the lying-in woman to take place indiscriminate when the childbirth, the condition that falls from the bed body appears even, play the guard action well to the lying-in woman, simultaneously through setting up the cabinet body, the bottom space of traditional medical obstetric table has been widened, can carry out the storing, the cavity of three difference is cut apart into with the cabinet body to two division boards, wherein elevating system is located the cavity at middle part, and other articles for use can be allowed to place to two other cavities, make things convenient for lying-in woman and family members to use, have very strong practicality.
Furthermore, four corners of the bottom of the cabinet body are fixedly connected with universal wheels. The universal wheels are arranged, so that the motility of the obstetric table is improved, medical staff can push the bed body to move in any direction, and the obstetric table plays a positive and effective role in obstetric delivery of obstetrics and gynecology.
Further, the lifting mechanism is positioned between the cabinet body and the bed body.
Further, the lifting mechanism comprises a first supporting block and a threaded cross bar, the first supporting block is fixedly connected with one end of the bottom of the bed body, a first bearing is fixedly embedded on the first supporting block, the threaded cross bar is connected with the first supporting block through the first bearing, a first crank is fixedly connected with one end of the threaded cross bar, a second supporting block is fixedly connected with one end of the bottom of the bed body, which is far away from the first supporting block, a second bearing is fixedly embedded on the second supporting block, one end of the threaded cross bar, which is far away from the first crank, is connected with the second supporting block through the second bearing, a movable block is arranged at the bottom of the bed body, a threaded hole is formed in the movable block, the movable block is in threaded connection with the threaded cross bar through the threaded hole, a first round bar is fixedly connected to two sides of the movable block, a first rotating bar is fixedly connected to two sides, a through groove is formed in the bed body, a connecting block is arranged in the through groove, the top of the connecting block is connected with the movable plate, second rotating rods are fixedly connected to two sides of the connecting block, second movable rods are arranged on two sides of the connecting block, one end of each second movable rod is movably hinged to the corresponding first rotating rod, and the other end of each second movable rod is movably hinged to the corresponding second rotating rod; the equal fixedly connected with second round bar in second movable rod middle part, the movable block both sides all are equipped with first movable rod, to first round bar, second round bar and the first movable rod of homonymy, the one end and the first round bar activity of first movable rod are articulated, and the other end and the second round bar activity of first movable rod are articulated.
Furthermore, both sides of one end of the movable plate close to the fixed plate are fixedly connected with supporting rods, and the movable plate is rotatably connected with the bed body through the supporting rods.
Further, the through groove is arranged corresponding to the movable plate.
Further, the bed body both sides are provided with the holding power mechanism, the holding power mechanism includes casing and support frame, casing and bed body fixed connection, the inside one end fixedly connected with bracing piece of casing, the support frame bottom is articulated with the bracing piece activity, support frame top one side fixedly connected with handle, the support frame middle part is provided with L shape pole, L shape pole and support frame sliding connection, the support frame bottom is equipped with the down tube, down tube one end and L shape pole one end activity hinge joint, the down tube other end and casing sliding connection. Through setting up the grip mechanism, can provide the point of borrowing power for the lying-in woman, when the lying-in woman is exerted oneself, it uses the bracing piece to carry out arc motion as the axle center to drive the L shape pole to push down the down tube simultaneously, make the down tube slide in the casing bottom, and drive the slide bar and slide in the rod cover, the extrusion spring, make the spring receive the extrusion force and produce elastic deformation, thereby absorb power and realize the buffering, make the lying-in woman can concentrate the strength of using when childbirth, reduce the childbirth time, it is very big effectively to have solved the misery that the pregnant woman received when childbirth, but current practise midwifery bed mostly does not set up the point of grabbing, be unfavorable for the pregnant woman to send out power, can take place the condition of grabbing oneself both hands even, not only can increase misery, and do not concentrate hard, increase
Further, the inside bracing piece one end fixedly connected with rod cover of keeping away from of casing, the inside spring that is equipped with of rod cover, spring one end and shells inner wall fixed connection, spring other end fixedly connected with slide bar, the slide bar cup joints with the rod cover activity, the slide bar is kept away from the one end and the down tube fixed connection of spring.
Further, a protective sleeve is arranged on the outer side of the handle.
Further, the protective sheath cup joints with the handle activity, and the protective sheath texture is soft, can increase the comfort level of handle to effectively protect lying-in woman's both hands, make lying-in woman can not receive the damage because of leading to the hand with strength when childbirth, cup joint through the activity between protective sheath and the handle simultaneously, can in time take off when the protective sheath makes dirty and change, keep clean health, and the practicality is extremely strong.
The invention has the beneficial effects that: the invention relates to a delivery assisting device for obstetrics and gynecology department,
1. by arranging the lifting mechanism, the first crank can be rotated to drive the threaded cross rod to rotate and drive the movable block to move, the two first round rods are used for driving the two first movable rods to move, the two second movable rods are respectively pushed to rotate by taking the first rotating rods as axes, and the two second rotating rods are used for driving the connecting block and the movable plate to rotate by taking the supporting rods as axes, so that the movable plate is lifted, the back and upper body postures of the pregnant woman are adjusted, and the labor is in near-term, thereby effectively solving the problem that the existing obstetric table cannot perform accurate angle adjustment when the upper body part of the existing obstetric table is lifted, so that the pregnant woman cannot perform correct clinical posture according to actual conditions and the problem of rapid delivery is realized;
2. by arranging the lifting mechanism, the second crank can be rotated, the transmission rod is driven to rotate, the transmission rod drives the two first bevel gears to rotate, the two first bevel gears respectively drive the two second bevel gears to rotate, so that the two threaded vertical rods are respectively driven to rotate, the two threaded sleeves are driven to lift up and down with the bed body, so that the height of the bed body can be adjusted to be suitable for the operation habit of a doctor, the delivery work can be smoothly carried out conveniently, meanwhile, the adjustment can be carried out according to the height of a puerpera, the puerpera can be more convenient to get on and off the bed, the problem that the conventional midwife bed is simple in structure and cannot be adjusted according to the height of the doctor and the delivery habit is effectively solved, the delivery work is carried out at the height suitable for the operation of the doctor, a great deal of inconvenience is caused during clinical use, and the heights of the pregnant women, the height of the obstetric table needs to be adjusted, so that the postpartum pregnant woman can get on and off the bed more conveniently.
Drawings
FIG. 1 is a schematic structural view of a delivery aid device for obstetrics and gynecology department of the invention;
FIG. 2 is an exploded view of the obstetric apparatus for obstetrics and gynecology department of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the portion B of FIG. 2 according to the present invention;
FIG. 5 is an enlarged view of the structure of the portion C in FIG. 2 according to the present invention;
FIG. 6 is an enlarged view of the portion D of FIG. 2 according to the present invention;
FIG. 7 is a front view of the obstetric apparatus for obstetrics and gynecology of the present invention;
in the figure: 1. a bed body; 2. a movable plate; 3. a fixing plate; 4. a cabinet body; 5. a first support block; 6. a threaded cross bar; 7. a first bearing; 8. a first crank; 9. a second support block; 10. a second bearing; 11. a movable block; 12. a first round bar; 13. a first rotating lever; 14. a through groove; 15. connecting blocks; 16. a second rotating rod; 17. a second movable bar; 18. a second round bar; 19. a first movable bar; 20. a U-shaped frame; 21. a transmission rod; 22. a third bearing; 23. a second crank; 24. a first bevel gear; 25. a threaded bushing; 26. a fourth bearing; 27. a threaded vertical rod; 28. a second bevel gear; 29. a concave slider; 30. a guide block; 31. a guide chute; 32. a protection plate; 33. protecting the fence; 34. a partition plate; 35. a universal wheel; 36. a strut; 37. a housing; 38. a support frame; 39. a support bar; 40. a grip; 41. a protective sleeve; 42. an L-shaped rod; 43. a diagonal bar; 44. a rod sleeve; 45. a spring; 46. a slide bar.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 to 7, the obstetric apparatus for gynaecology and obstetrics provided by the invention comprises a bed body 1, wherein a movable plate 2 and a fixed plate 3 are arranged at the top of the bed body 1, the fixed plate 3 is connected with the bed body 1, one end of the movable plate 2 close to the fixed plate 3 is rotatably connected with the bed body 1, a lifting mechanism is arranged at the bottom of the bed body 1 and used for controlling the movable plate 2 to rotate around the joint of the movable plate 2 and the fixed plate 3, the front end and the rear end of the bed body 1 are respectively provided with a protection plate 32, the left end and the right end of the bed body 1 are respectively provided with a protection guard 33, a cabinet body 4 is arranged at the bottom. Through setting up guard plate 32 and rail guard 33, can form the effective protection in both sides and both sides of the bed body 1, can effectively block pregnant woman's health, avoid lying-in woman to take place the disorder when the childbirth, the condition that falls appears even from the bed body 1, play good protective action to the lying-in woman, through setting up the cabinet body 4 simultaneously, the bottom space of traditional medical obstetric table has been widened, can carry out the storing, two division boards 34 divide the cabinet body 4 into three different cavitys, wherein elevating system is located the cavity in middle part, and other articles for use can be allowed to place in two other cavitys, make things convenient for lying-in woman and family members to use, have very strong practicality, and the setting of universal wheel 35, increased the motility of the invention, make medical staff can promote bed body 1 to carry out the removal of arbitrary direction, play positive effectual effect to the gynaecology and obstetrics.
Specifically, four corners of the bottom of the cabinet body 4 are fixedly connected with universal wheels 35.
Specifically, the lifting mechanism is located between the cabinet 4 and the bed body 1.
Specifically, the lifting mechanism comprises a first supporting block 5 and a threaded cross rod 6, the first supporting block 5 is fixedly connected with one end of the bottom of the bed body 1, a first bearing 7 is fixedly embedded on the first supporting block 5, the threaded cross rod 6 is connected with the first supporting block 5 through the first bearing 7, one end of the threaded cross rod 6 is fixedly connected with a first crank 8, one end of the bottom of the bed body 1, far away from the first supporting block 5, is fixedly connected with a second supporting block 9, a second bearing 10 is fixedly embedded on the second supporting block 9, one end of the threaded cross rod 6, far away from the first crank 8, is connected with the second supporting block 9 through the second bearing 10, a movable block 11 is arranged at the bottom of the bed body 1, a threaded hole is formed in the movable block 11, the movable block 11 is in threaded connection with the threaded cross rod 6 through the threaded hole, and first round rods 12 are fixedly connected to two sides of the movable block 11, the two sides of the second supporting block 9 are fixedly connected with first rotating rods 13, a through groove 14 is formed in the bed body 1, a connecting block 15 is arranged in the through groove 14, the top of the connecting block 15 is connected with the movable plate 2, the two sides of the connecting block 15 are fixedly connected with second rotating rods 16, the two sides of the connecting block 15 are respectively provided with a second movable rod 17, one end of each second movable rod 17 is movably hinged with the first rotating rod 13, and the other end of each second movable rod 17 is movably hinged with the second rotating rod 16 for the first rotating rod 13, the second rotating rod 16 and the second movable rod 17 which are on the same side; the equal fixedly connected with second round bar 18 in second movable rod 17 middle part, 11 both sides of movable block all are equipped with first movable rod 19, to first round bar 12, second round bar 18 and the first movable rod 19 of homonymy, the one end and the first round bar 12 activity of first movable rod 19 are articulated, and the other end and the second round bar 18 activity of first movable rod 19 are articulated.
Specifically, two sides of one end of the movable plate 2 close to the fixed plate 3 are fixedly connected with supporting rods 36, and the movable plate 2 is rotatably connected with the bed body 1 through the supporting rods 36.
Specifically, the through groove 14 is disposed corresponding to the movable plate 2.
Specifically, the top of the connecting block 15 is slidably connected with the bottom of the movable plate 2.
In a preferred embodiment, the first crank 8 may be replaced by a motor, the output shaft of which is connected to the threaded crossbar 6, the motor being used to control the rotation of the threaded crossbar 6. At least one row of pressure detection unit queues is arranged at the top of the movable plate 2, and in the pressure detection unit queues, the pressure detection units are sequentially arranged from one end far away from the fixed plate to the direction close to the fixed plate. The pressure detection unit queue is linked with the motor, and lets fly leaf 2 cater to the user fast and lie down or rise, the pressure detection unit queue is used for detecting the pressure of user head, shoulder and waist to fly leaf 2, judges user action trend according to the pressure of head, shoulder and waist, can choose for use current algorithm to judge.
When in use, a medical worker can hold the first crank 8 to rotate, so that the first crank 8 drives the threaded cross rod 6 to rotate at the inner sides of the first bearing 7 and the second bearing 10, and the movable block 11 is in threaded connection with the threaded cross rod 6 through the threaded hole, so that the movable block 11 can be driven to linearly move along the threaded cross rod 6 along with the rotation of the threaded cross rod 6, because one ends of the two first movable rods 19 are respectively and movably hinged with the first round rods 12 at the two ends of the movable block 11, the movable block 11 can drive the two first movable rods 19 to move through the first round rods 12 when moving, because one ends of the two first movable rods 19, which are far away from the two first round rods 12, are respectively and movably hinged with the two second round rods 18, the two second movable rods 17 can be simultaneously pushed to move, because one ends of the two second movable rods 17 are respectively and movably hinged with the two first rotating rods 13, the two second movable rods 17 rotate by taking the first rotating rod 13 as an axis, meanwhile, because the ends, far away from the two first rotating rods 13, of the two second movable rods 17 are movably hinged with the two second rotating rods 16 respectively, the two second rotating rods 16 can drive the connecting block 15 to move, meanwhile, because the end, close to the fixed plate 3, of the movable plate 2 is fixedly connected with the supporting rod 36, when the connecting block 15 moves, the movable plate 2 can be driven to rotate by taking the supporting rod 36 as the axis, so that the movable plate 2 is lifted, and by arranging the lifting mechanism, medical staff can lift the movable plate 2 by rotating the first crank 8, so that the back and upper body postures of the pregnant woman can be adjusted, the labor is in the near field, and the problems that the existing obstetric table cannot perform accurate angle adjustment when lifting the upper body part is performed, so that the pregnant woman cannot make a correct clinical posture according to actual conditions can be put out are, the problem of realizing rapid delivery.
Specifically, a lifting mechanism is arranged in the middle of the cabinet body 4, the lifting mechanism comprises a U-shaped frame 20 and a transmission rod 21, the U-shaped frame 20 is fixedly connected with the bottom in the cabinet body 4, the third bearings 22 are fixedly embedded at the two ends of the top of the U-shaped frame 20, two ends of the transmission rod 21 are respectively connected with the top of the U-shaped frame 20 through a third bearing 22 in a rotating way, one end of the transmission rod 21 is fixedly connected with a second crank 23, two first bevel gears 24 are sleeved on the transmission rod 21, the bottom of the bed body 1 is fixedly connected with two threaded sleeves 25, the threaded sleeves 25 are sleeved on the tops of threaded vertical rods 27, the threaded vertical rods 27 penetrate through the cabinet body 4, and the threaded vertical rod 27 is rotatably connected with the cabinet body 4 through a fourth bearing 26, and the bottom of the threaded vertical rod 27 is provided with a second bevel gear 28, and the second bevel gear 28 is respectively in meshed connection with the first bevel gear 24.
Specifically, 1 equal fixedly connected with spill slider 29 in bottom four corners of the bed body, the equal fixedly connected with guide block 30 in 4 top four corners of the cabinet body, guide block 30 and the setting of spill slider 29 one-to-one, direction spout 31 has been seted up on the lateral wall of guide block 30, spill slider 29 is respectively through direction spout 31 and guide block 30 sliding connection, when two screw thread montants 27 are rotatory, can drive two screw thread sleeve pipes 25 and carry out the elevating movement to drive spill slider 29 and move along direction spout 31, the skew on the angle can not take place for the in-process of rising and decline can be guaranteed to the setting of guide block 30, plays certain supporting role to the bed body 1 simultaneously.
Specifically, be provided with two spacing support piece on the lateral wall of screw thread montant 27, spacing support piece sets up in the upper and lower both sides of the 4 roofs of the cabinet body, through the cooperation of spacing support piece, fourth bearing 26 and the 4 roofs of the cabinet body, provides stable, safe movable support for screw thread montant 27 and the bed body 1 of being connected with screw thread montant 27.
When in use, a medical staff holds the second crank 23 to start rotating, and drives the transmission rod 21 to rotate respectively at the inner sides of the third bearings 22 at the two ends of the top of the U-shaped frame 20, so as to drive the two first bevel gears 24 to rotate, because the two first bevel gears 24 are meshed with the two second bevel gears 28, the two first bevel gears 24 can drive the two second bevel gears 28 to rotate respectively while rotating, and simultaneously drive the two vertical threaded rods 27 to rotate respectively at the inner sides of the two fourth bearings 26, because the tops of the two vertical threaded rods 27 are respectively in threaded connection with the two threaded sleeves 25, when the two vertical threaded rods 27 rotate, the two threaded sleeves 25 can be driven to move up and down with the bed body 1, so as to drive the four concave sliding blocks 29 to respectively slide along the guiding chutes 31 on the four guiding blocks 30, and stop rotating the second crank 23 until the height of the bed body 1 is suitable for the operation habit of a doctor, through setting up elevating system, can be through rotating second crank 23, the altitude mixture control that rises and descend is carried out to the bed body 1, make the bed body 1 highly can be fit for doctor's operation custom, be convenient for go on smoothly of delivering work, also can carry out the adjustment on the height according to the height of lying-in woman simultaneously, it is more convenient to make the lying-in woman when going to bed at last, it is comparatively simple effectively to have solved the big multijunction structure of current obstetric table, can not be according to doctor's height and delivering custom height-adjusting, thereby highly delivering work is carried out at the operation of being fit for the doctor, lead to producing inconvenience when clinical use, and pregnant woman's height is all inequality, need the adjustment on the height of obstetric table can be carried out, be convenient for postpartum pregnant woman is more convenient problem when going to bed.
Specifically, 1 both sides of bed body are provided with the grip mechanism, the grip mechanism includes casing 37 and support frame 38, casing 37 and 1 fixed connection of bed body, the inside one end fixedly connected with bracing piece 39 of casing 37, support frame 38 bottom and bracing piece 39 activity hinge, support frame 38 top one side fixedly connected with handle 40, support frame 38 middle part is provided with L shape pole 42, L shape pole 42 and support frame 38 sliding connection, support frame 38 bottom is equipped with down tube 43, down tube 43 one end and L shape pole 42 one end activity hinge, the down tube 43 other end and casing 37 sliding connection, through the sliding connection of down tube 43 with casing 37, can drive down tube 43 through L shape pole 42 and slide in the casing is inside when support frame 38 receives the extrusion, share the extrusion force.
Specifically, casing 37 is inside to be kept away from bracing piece 39 one end fixedly connected with pole cover 44, the inside spring 45 that is equipped with of pole cover 44, spring 45 one end and casing 37 inner wall fixed connection, spring 45 other end fixedly connected with slide bar 46, slide bar 46 cup joints with the activity of pole cover 44, spring 45 one end and down tube 43 fixed connection are kept away from to slide bar 46, and spring 45's setting can produce elastic deformation when receiving the extrusion to absorb the extrusion force, realize certain cushioning effect.
Specifically, the handle 40 outside is equipped with protective sheath 41, protective sheath 41 cup joints with the handle 40 activity, and protective sheath 41 texture is soft, can increase handle 40's comfort level to effectively protect lying-in woman's both hands, make the lying-in woman can not receive the damage because of forcing on the hand when childbirth, cup joint through the activity between protective sheath 41 and the handle 40 simultaneously, can in time take off when protective sheath 41 makes dirty and change, keep clean health, the practicality is extremely strong.
When the parturient needs to grasp a point for helping to borrow force during childbirth, the medical staff can help the parturient to respectively hold the two handles 40 by two hands of the parturient, when the parturient grasps the two handles 40 for helping to borrow force, the bottom of the support frame 38 is movably hinged with the support rod 39, so that the support frame 38 is driven to do arc motion by taking the support rod 39 as an axis, the L-shaped rod 42 is driven to press the inclined rod 43 downwards, one end of the inclined rod 43 is movably hinged with one end of the L-shaped rod 42, the other end of the inclined rod 43 is connected with the shell 37 in a sliding way, so that the inclined rod 43 can be driven to slide at the bottom in the shell 37, the slide rod 46 is driven to slide in the rod sleeve 44, the spring 45 is extruded to generate elastic deformation by extrusion force, the force is absorbed, certain buffering effect is achieved, and a force helping point can be provided for the parturient by, reduce the childbirth time, it is very big to have effectively solved the misery that the pregnant woman received when childbirth, but current practise midwifery bed does not set up most and grabs the point, is unfavorable for the pregnant woman to send out power, can take place the condition of grabbing the both hands of oneself broken even, not only can increase the misery, does not concentrate hard moreover, increases the time of childbirth on the contrary, causes the problem of production difficulty.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.