Disclosure of Invention
The invention provides an intelligent crutch walking aid and a use method thereof, which are used for improving the problem that the crutch is at risk of falling down when the crutch is used for going down stairs in the prior art, and can reduce the risk that a user falls down from stairs due to unstable gravity center in the process of going down stairs.
To achieve the above object, in a first aspect, the present invention provides an intelligent walking aid for an axillary pole, comprising:
A first support;
One end of the second support piece is hinged to the first support piece;
a third support slidably coupled to the second support in a first direction;
The driving device comprises a first driving component and a second driving component, the first driving component is arranged corresponding to the hinge shafts of the first supporting piece and the second supporting piece, and the first driving component is used for driving the second supporting piece and the first supporting piece to rotate relatively; the second driving component is arranged at the joint of the third supporting piece and the second supporting piece, and is used for driving the third supporting piece to slide relative to the second supporting piece;
The first direction is the connecting line direction of one end of the second supporting piece hinged with the first supporting piece and the other end of the second supporting piece. When the intelligent crutch walker is used, the driving device is started, so that one end of the first supporting piece, which is far away from the second supporting piece, the hinge joint of the first supporting piece and the second supporting piece and the tail end of the third supporting piece are positioned on the same straight line, and the state is recorded as a straightening state; the first supporting piece is clamped under the armpit of a user, the arm of the user stretches forwards, the hinge joint of the first supporting piece and the second supporting piece is located above the target ladder along the vertical direction, the first driving component is started, the third supporting piece is parallel to the vertical direction, the second driving component is started, the third supporting piece slides away from the second supporting piece, the tail end of the third supporting piece is abutted to the target ladder, the driving device enables the intelligent crutch walker to recover to the straightening state, meanwhile, the second driving component enables the second supporting piece to slide towards the third supporting piece, so that the movement track of the end part of the first supporting piece, which is away from the second supporting piece, is enabled to be in the horizontal direction, enables the armpit of the user supported by the end part of the first supporting piece to stably move along the horizontal direction, and enables the user to stably descend when the user reaches the upper side of the target ladder, and accordingly the risk of falling down of the stair is not reduced due to the falling of the stair in the movement track of the intelligent crutch, and the risk of the user is not lowered in the straightening process. In addition, in the process that the user uses the intelligent crutch walker to walk down stairs, the driving device assists or replaces the function of transferring the gravity center by driving the user's healthy side legs, and the driving device can drive the user to transfer the gravity center with more uniform and accurate force, so that the safety of the user in the process of walking down stairs is improved.
As an optional solution, the first support member includes a first side and a second side disposed opposite to each other, and the second support member is hinged to the first side;
the intelligent crutch walker also comprises an armpit pillow, wherein the armpit pillow is connected to the second side in a sliding manner along the second direction, and a buffer structure is arranged between the armpit pillow and the second side;
the second direction is a connecting line direction of the first side and the second side. The armpit pillow can weaken the impact on a human body when the intelligent crutch walker is used for moving, so that the comfort level is improved.
As an optional technical scheme, the buffer structure comprises two opposite supporting arms and a buffer guide rail, wherein the supporting arms are arranged on the second side, and extension lines of axes of the two supporting arms pass through a hinge point of the first supporting piece and the second supporting piece, opposite side surfaces of the two supporting arms are matched with the armpit pillow;
The cushioning guide rail is arranged between the two supporting arms along the second direction, and the cushioning guide rail is connected with the armpit pillow in a sliding mode. After the body of a user contacts the armpit pillow, the armpit pillow can firstly contact the poking plate, then the poking plate is stressed and retracted, so that the buffering and decompression effects of the armpit pillow are achieved, meanwhile, the cushioning guide rail is designed, so that the armpit pillow always moves along the extending direction of the cushioning guide rail after the external force is applied by the user, and the armpit pillow is prevented from falling off from the first supporting piece.
As an optional technical scheme, the first driving component comprises a first rotation driving piece and/or a first telescopic driving piece, wherein the first rotation driving piece is arranged at the hinge joint of the first supporting piece and the second supporting piece;
the first telescopic driving piece is arranged at the hinge position of the first supporting piece and the second supporting piece, one end of the first telescopic driving piece is connected with the first supporting piece, and the other end of the first telescopic driving piece is connected with the second supporting piece. The first rotary driving piece and the first telescopic driving piece can play a role in fixing the first supporting piece and the second supporting piece relatively when the first supporting piece and the second supporting piece are stopped to be driven to rotate relatively, the first rotary driving piece and the first telescopic driving piece are matched to be used, so that not only can the driving force be supplied to each other in a complementary mode, but also when one of the driving force is invalid, the other driving piece can lock the first supporting piece and the second supporting piece mutually, and the intelligent walking aid is beneficial to improving the safety of the intelligent walking aid.
As an optional technical scheme, the first support piece is provided with a limiting rod, and the rotation track of the second support piece is at least partially intersected with the limiting rod;
The first telescopic driving piece is arranged along the radial direction of the hinge shaft of the second supporting piece and the first supporting piece and is opposite to the limiting rod. The intelligent walking stick walking aid of the technical scheme is characterized in that when the intelligent walking stick walking aid is used, the direction of one side provided with the limiting rod is the same as the direction of a user, the limiting rod can prevent the first supporting piece from further rotating when the first supporting piece rotates to be in contact with the limiting rod, and the situation that the second supporting piece excessively rotates to cause the user to fall from the front side of the intelligent walking stick walking aid is avoided, so that the safety of the intelligent walking stick walking aid in the technical scheme is improved.
The first driving component comprises a first telescopic driving piece, a plurality of connecting blocks are arranged on the first supporting piece, the connecting blocks are stacked along the direction from one end to the other end of the first supporting piece connected with the second supporting piece, and the end part of the first telescopic driving piece is detachably connected with one or more of the connecting blocks. Under the premise of not changing the first telescopic driving piece, when the first telescopic driving piece is connected to the connecting block close to the hinge joint of the first supporting piece and the second supporting piece, the force arm acted by the first telescopic driving piece is short, the first telescopic driving piece bears larger load and can drive the first supporting piece and the second supporting piece to rotate relatively at a faster angular speed, the intelligent auxiliary walking stick is suitable for users with lighter weight or lighter injury, when the first telescopic driving piece is connected to the connecting block far away from the hinge joint of the first supporting piece and the second supporting piece, the force arm acted by the first telescopic driving piece is long, the first telescopic driving piece bears smaller load and can drive the first supporting piece and the second supporting piece to rotate relatively at a slower angular speed, the intelligent auxiliary walking stick is suitable for users with heavier weight or more serious injury, and the intelligent auxiliary walking stick is beneficial to the adaptation of different people with different demands.
As an optional technical scheme, a rack is arranged on the third support piece, the rack is arranged along the first direction, and the second driving assembly is meshed with the rack.
As an optional technical scheme, a first supporting leg is arranged at the end part of the third supporting piece, which is away from the second supporting piece, the first supporting leg is hinged to the third supporting piece, and the hinge shaft of the first supporting leg and the third supporting piece is parallel to the hinge shaft of the first supporting piece and the second supporting piece;
The driving device further comprises a third driving assembly, the third driving assembly is arranged corresponding to the hinge shaft of the first supporting leg and the third supporting piece, and the third driving assembly is used for driving the first supporting leg to rotate relative to the third supporting piece. When the end part of the third supporting piece is propped against the target ladder, the third driving assembly drives the first supporting leg to fall down, so that the first supporting leg is propped against the next step of the target ladder, and the intelligent crutch walking aid can be prevented from overturning forwards in the process of going down stairs.
As an optional technical scheme, the end part of the third supporting piece, which is away from the second supporting piece, is further provided with a second supporting leg, the second supporting leg is opposite to the first supporting leg, and the second supporting leg is fixedly connected with the third supporting piece. The second leg is capable of providing support on the side of the third support member adjacent the user when the end of the third support member abuts the target step, which is advantageous in preventing the intelligent pole walker from tipping rearward.
In a second aspect, the invention also discloses a use method of the intelligent walking aid for the crutch, which is applied to the intelligent walking aid for the crutch in any one of the technical schemes, and comprises the following steps:
the driving device is started, the first supporting piece is rotated, one end of the first supporting piece, which is far away from the second supporting piece, the hinge joint of the first supporting piece and the second supporting piece and the tail end of the third supporting piece are positioned on the same straight line, and the state is recorded as the straightening state of the intelligent crutch walker;
clamping one end of the first support piece, which is far away from the second support piece, under the armpit of a user;
rotating the first support piece to enable the hinge joint of the first support piece and the second support piece to be located above a target ladder along the vertical direction;
The first driving assembly enables the second supporting piece and the third supporting piece to rotate, so that the connecting line of the connecting point of the first supporting piece and the second supporting piece and the tail end of the third supporting piece is parallel to the plumb direction;
the driving device is started to enable the intelligent crutch walker to recover to the straightening state, and the second driving assembly drives the third supporting piece to slide towards the second supporting piece.
The one or more technical schemes provided by the invention have at least the following technical effects or advantages:
According to the intelligent walking aid for the crutch, when the intelligent walking aid is used, a user clamps the first support piece on the crutch, the third support piece props against a target ladder, the first support piece and the second drive piece assist or replace the force exerted by the user on the leg of the user by more uniform and accurate force, and the gravity center moving track of the user is optimized through the mutual movement of the first support piece, the second support piece and the third support piece, so that the risk that the user falls down from the ladder due to unstable gravity center in the stair descending process is reduced.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be in the form of a fixed connection, a removable connection, or a unitary construction, it may be in the form of a mechanical connection, it may be in the form of an electrical connection, it may be directly or indirectly via an intermediate medium, or it may be in the form of an internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
As shown in fig. 1 to 7, the present embodiment provides an intelligent walking aid for an armpit, which comprises a first support member 1, a second support member 2, a third support member 3 and a driving device. The driving device comprises a first driving component 11 and a second driving component 31, wherein the first driving component 11 is arranged corresponding to a hinge shaft of the first supporting component 1 and the second supporting component 2, the first driving component 11 is used for driving the second supporting component 2 to relatively rotate relative to the first supporting component 1, the second driving component 31 is arranged corresponding to a joint of the third supporting component 3 and the second supporting component 2, and the second driving component 31 is used for driving the third supporting component 3 to relatively slide relative to the second supporting component 2;
The first direction X is a connecting line direction between one end of the second support member 2 hinged to the first support member 1 and the other end. When the intelligent crutch walker is used, the driving device is started, so that one end of the first support piece 1, which is far away from the second support piece 2, the hinge joint of the first support piece 1 and the second support piece 2 and the tail end of the third support piece 3 are positioned on the same straight line, and the state is recorded as a straightening state; the first supporting piece 1 is clamped under the armpit of a user, the arm of the user stretches forwards, the hinge joint of the first supporting piece 1 and the second supporting piece 2 is located above a target ladder along the vertical direction, the first driving component 11 is started, the third supporting piece 3 is parallel to the vertical direction, the second driving component 31 is started, the third supporting piece 3 slides away from the second supporting piece 2 and enables the tail end of the third supporting piece 3 to abut against the target ladder, the driving device enables the intelligent crutch walker to recover to a straightened state, meanwhile, the second driving component 31 enables the second supporting piece 2 to slide towards the third supporting piece 3, so that the movement track of the end of the first supporting piece 1 away from the second supporting piece 2 is along the horizontal direction in the process of recovering the straightened state of the intelligent crutch walker, the user armpit supported by the end of the first supporting piece 1 is enabled to stably move along the horizontal direction under the common coupling action of the first driving component 11 and the second driving component 31 to stably descend above the target ladder, and the user's gravity center is enabled to stably descend when the user's gravity center is not lowered in the process of falling down stairs due to the optimization of the movement of the user. In addition, in the process that the user uses intelligent armpit walking aid to descend stairs, the driving device assists or replaces the function of transferring the gravity center through driving of the user's healthy side legs, and the driving device can drive the user to transfer the gravity center with more uniform and accurate force, so that the safety of the user in the process of descending stairs is improved.
It should be noted that, the intelligent crutch walker of the present invention may be applied to a scene of going up stairs, walking on level ground, etc. besides a scene of going down stairs, the driving device is used to make the first support member 1 and the second support member 2 rotate relatively, and the second support member 2 and the third support member 3 slide relatively, so as to assist the user in transferring the center of gravity and stabilizing the moving track of the center of gravity, thereby realizing safe and labor-saving movement.
Optionally, the first support 1 is provided with a handle 19, the handle 19 is provided with a switch 191, the switch 191 is connected to the first driving component 11 and the second driving component 31 in a signal manner, the number of the handles 19 can be multiple, one or a plurality of the handles 19 are provided with the switch 191, and a user can hold the handles 19 without the switch 191 to move without assistance of a driving device, so as to prevent false touch.
Optionally, the second support 2 is provided with an angle sensor 21, and the angle sensor 21 is used for acquiring the inclination angle of the current intelligent walking aid for the crutch. Through obtaining the inclination of intelligent armpit walking aid, can instruct the rotatory angle of first drive assembly 11, make second support piece 2 rotatory back under the effect of first drive assembly 11, the axial of third support piece 3 is on a parallel with plumb direction to improve the convenience that intelligent armpit walking aid used. The angle sensor 21 may be a gyroscope or a level meter, etc., and the present embodiment is not limited herein.
In some embodiments, the third support 3 may also be provided with a guide rail in the sliding direction to cooperate with the second support 2.
Example 2
As shown in fig. 1-3, on the basis of embodiment 1, the first support 1 comprises a first side 12 and a second side 13 arranged opposite to each other, and the second support 2 is hinged to the first side 12;
The intelligent crutch walker also comprises an armpit pillow 14, wherein the armpit pillow 14 is connected to the second side 13 in a sliding way along the second direction Y, and a buffer structure is arranged between the armpit pillow 14 and the second side 13;
the second direction Y is a connecting line direction between the first side 12 and the second side 13. The armpit pillow 14 can reduce the impact on a human body when the intelligent crutch walker is used for movement, thereby improving the comfort level.
As an alternative embodiment, the buffer structure comprises two opposite supporting arms 16 and a buffer guide rail 15, the supporting arms 16 are arranged on the second side 13, the extension lines of the axes of the two supporting arms 16 pass through the hinge point of the first supporting piece 1 and the second supporting piece 2, and the opposite sides of the two supporting arms 16 are matched with the armpit rest 14;
The cushioning guide rail 15 is disposed between the two support arms 16 along the second direction Y, and the cushioning guide rail 15 is slidably connected to the armpit rest 14. After the body of a user contacts the armpit pillow 14, the armpit pillow 14 firstly contacts the poking plate 161, and the poking plate 161 is retracted under force, so that the buffering and decompression effects of the armpit pillow 14 are realized, and meanwhile, the cushioning guide rail 15 is designed, so that the armpit pillow 14 always moves along the extending direction of the cushioning guide rail 15 after the external force is applied by the user, and the armpit pillow 14 is prevented from falling out of the first supporting piece 1.
The dial 161 should be connected to a member having elasticity such as a spring or an air bag.
Wherein, the tail end of the cushioning guide rail 15 can be provided with an expanded limit part for preventing the axillary pillow 14 from falling off, and one or more guide grooves or guide rails can be arranged in the groove matched with the cushioning guide rail 15
As an alternative embodiment, the first driving assembly 11 comprises a first rotation driving piece 111 and/or a first telescopic driving piece 112, wherein the first rotation driving piece 111 is arranged at the hinge joint of the first supporting piece 1 and the second supporting piece 2;
the first telescopic driving piece 112 is arranged at a hinge position corresponding to the first supporting piece 1 and the second supporting piece 2, and one end of the first telescopic driving piece is connected with the first supporting piece 1, and the other end of the first telescopic driving piece is connected with the second supporting piece 2. When the first rotary driving piece 111 and the first telescopic driving piece 112 stop driving the first supporting piece 1 and the second supporting piece 2 to rotate relatively, the first supporting piece 1 and the second supporting piece 2 can be fixed relatively, the first rotary driving piece 111 and the first telescopic driving piece 112 can be matched to provide enough driving force for mutual supplement, and when one of the driving forces fails, the other driving piece can lock the first supporting piece 1 and the second supporting piece 2 with each other, so that the safety of the intelligent walking stick walking aid is improved.
The first rotary driving member 111 may be a motor or a rotary cylinder, and the first telescopic driving member 112 may be a linear cylinder or a hydraulic rod.
As an alternative embodiment, the first support member 1 is provided with a limiting rod 17, and the rotation track of the second support member 2 at least partially intersects with the limiting rod 17;
The first telescopic driving piece 112 is disposed opposite to the limit lever 17 along the hinge axis of the second supporting piece 2 and the first supporting piece 1 in the radial direction. When the intelligent walking stick walking aid of the embodiment is used, the direction of one side provided with the limiting rod 17 is the same as the direction of a user, the limiting rod 17 can prevent the first supporting piece 1 from further rotating when the first supporting piece 1 rotates to be in contact with the limiting rod 17, and the situation that a user falls from the front side of the intelligent walking stick walking aid due to excessive rotation of the second supporting piece 2 is prevented, so that the safety of the intelligent walking stick walking aid of the embodiment is improved.
As an alternative embodiment, the first driving assembly 11 includes a first telescopic driving member 112, the first supporting member 1 is provided with a plurality of connection blocks 18, the plurality of connection blocks 18 are stacked along a direction from one end to the other end of the first supporting member 1 connected with the second supporting member 2, and an end of the first telescopic driving member 112 is detachably connected to one or more of the plurality of connection blocks 18. On the premise of not changing the first telescopic driving piece 112, when the first telescopic driving piece 112 is connected to the connecting block 18 near the hinge joint of the first supporting piece 1 and the second supporting piece 2, the moment arm acted by the first telescopic driving piece 112 is short, the first telescopic driving piece 112 bears larger load and can drive the first supporting piece 1 and the second supporting piece 2 to rotate relatively at a faster angular speed, and when the first telescopic driving piece 112 is connected to the connecting block 18 near the hinge joint of the first supporting piece 1 and the second supporting piece 2, the moment arm acted by the first telescopic driving piece 112 is long, the first telescopic driving piece 112 bears smaller load and can drive the first supporting piece 1 and the second supporting piece 2 to rotate relatively at a slower angular speed, so that the telescopic driving piece is suitable for people with different weights and different demands.
As an alternative embodiment, as shown in fig. 5 and 6, the third support 3 is provided with a rack, which is arranged along the first direction X, and the second driving assembly 31 is engaged with the rack.
Wherein the second drive assembly 31 may be a motor-driven gear or worm gear or the like capable of engaging the rack.
As an alternative embodiment, the end of the third support 3 facing away from the second support 2 is provided with a first leg 32, the first leg 32 being hinged to the third support 3, and the hinge axis of the first leg 32 and the third support 3 being parallel to the hinge axis of the first support 1 and the second support 2;
The driving device further comprises a third driving assembly 33, the third driving assembly 33 is disposed corresponding to the hinge axis of the first supporting leg 32 and the third supporting member 3, and the third driving assembly 33 is used for driving the first supporting leg 32 to rotate relative to the third supporting member 3. When the end of the third support member 3 abuts against the target ladder, the third driving assembly 33 drives the first supporting leg 32 to fall, so that the first supporting leg 32 abuts against the next step of the target ladder, and the intelligent crutch walker is prevented from overturning forwards in the process of going down stairs. Wherein the third drive assembly 33 may be a linear cylinder or a hydraulic rod.
Optionally, the end of the third support member 3 is provided with stability judging sensors 35 at two sides along the axial direction of the hinge shaft of the first support member 1 and the second support member 2, and the stability judging sensors 35 are used for acquiring the strength and the inclination angle when the end of the third support member 3 abuts against the target ladder. The stability judging sensor 35 is electrically connected to the second driving unit 31 and the third driving unit 33. When the end of the third support member 3 slides away from the second support member 2 under the action of the second driving component 31 and abuts against the surface of the target step, and the first leg 32 abuts against the next step of the target step, the stability judgment sensor 35 can judge whether the third support member 3 firmly abuts against the target step in a stable posture, and after the stability judgment sensors 35 on both sides judge that the results are stable, the first driving component 11 and the second driving component 31 can enable the intelligent walking stick walker to recover to a straightened state, so as to assist the user in transferring the center of gravity. . The stability judging sensor 35 may be an integrated sensor module of a sensor for measuring direct force, such as an accelerometer, a gyroscope, etc. for judging inclination angle and a sensor for measuring direct force, etc.
As an alternative embodiment, the end of the third support 3 facing away from the second support 2 is further provided with a second leg 34, the second leg 34 being arranged opposite the first leg 32, the second leg 34 being fixedly connected to the third support 3. The second leg 34 is able to provide support on the side of the third support member 3 adjacent the user when the end of the third support member 3 is resting against the target step, which is advantageous in preventing the intelligent pole walker from tipping back.
Further, third support legs 36 may be provided at the ends of the third support member 3 along both sides of the hinge axis of the first support member 1 and the second support member 2 for preventing the intelligent pole walker from tipping sideways.
In addition, anti-slip pads may be provided at the portions of the first, second, third, and third legs 32, 34, 36, and the end portion of the third support 3, etc. that directly contact the ground to increase friction.
Example 3
The embodiment discloses a method for using an intelligent walking aid for an armpit, which is applied to the intelligent walking aid for the armpit in any one of the embodiments, and comprises the following steps:
S10, starting a driving device, rotating the first support piece 1 to enable one end of the first support piece 1, which is far away from the second support piece 2, a hinge joint of the first support piece 1 and the second support piece 2 and the tail end of the third support piece 3 to be positioned on the same straight line, and recording the state as a straightening state of the intelligent crutch walker;
S20, clamping one end, away from the second support piece 2, of the first support piece 1 of the intelligent crutch walker on the left side and the right side to the armpits of a user;
S30, rotating the first support piece 1 to enable the hinge joint of the first support piece 1 and the second support piece 2 to be located above the target ladder along the vertical direction;
S40, the first driving component 11 rotates the second supporting piece 2 and the third supporting piece 3, so that the connecting line between the hinge joint of the first supporting piece 1 and the second supporting piece 2 and the tail end of the third supporting piece 3 is parallel to the vertical direction, and the second driving component 31 drives the third supporting piece 3 to deviate from the second supporting piece 2 to slide, so that the tail end of the third supporting piece 3 of the intelligent walking stick walking aid on the left side and the right side is abutted to a target ladder;
s50, starting the driving device to enable the intelligent crutch walker to return to the straightened state, and driving the third support 3 to slide towards the second support 2 by the second driving component 31.
Specifically, step S40 includes:
S41, extending arms of a user forwards to drive the intelligent crutch walker to incline;
S42, the angle sensor 21 acquires the inclination angle of the first support piece 1, and the first driving assembly 11 drives the second support piece 2 and the third support piece 3 to rotate according to the inclination angle of the first support piece 1, so that the connecting line between the hinge joint of the first support piece 1 and the second support piece 2 and the tail end of the third support piece 3 is parallel to the plumb direction;
S43, the second driving component 31 drives the third supporting piece 3 to slide away from the second supporting piece 2, so that the tail end of the third supporting piece 3 is abutted against the target ladder, and the second supporting leg 34 supports the surface of the target ladder;
s44, starting the third driving group 33 to enable the first supporting leg 32 to prop against the next step of the target steps;
S45, the stability judging sensors 35 of the intelligent axillary pole walker on the left and right sides judge whether the third supporting piece 3 firmly butts against the target ladder in a stable posture.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.