阅读说明：本技术 一种口腔护理冲牙器 (Oral care tooth flusher ) 是由 何世祥 费诗超 徐攀 邓兴强 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种口腔护理冲牙器,包括喷嘴、主体、手柄和软管；喷嘴与主体一端连通,主体另一端通过中塞与手柄一端连接,手柄另一端通过端塞与软管连接；软管一端穿过手柄并与主体管道连通,软管另一端与水龙头连通,用于提供水源；主体为一根孔径渐变的管道,管道的尖端与喷嘴连通；喷嘴呈锥形,锥形的尖端为出水口,且在锥形状的喷嘴内安装有用于将水雾化的涡轮,喷嘴的顶部通过超声焊接涡轮盖。本发明将水龙头导出的具有一定压力的水导入主体内,主体管径渐变,增加水压,将增压后的水导入喷嘴,喷嘴冲击涡轮转动,将水雾化,清洗牙齿,结构简单,无需电源和电机,也不需要提前存储水量,可以长期使用,具有较强的实用性。(The invention discloses an oral care tooth rinsing device, which comprises a nozzle, a main body, a handle and a hose; the nozzle is communicated with one end of the main body, the other end of the main body is connected with one end of the handle through the middle plug, and the other end of the handle is connected with the hose through the end plug; one end of the hose penetrates through the handle and is communicated with the main pipeline, and the other end of the hose is communicated with the water tap and is used for providing water source; the main body is a pipeline with gradually changed aperture, and the tip of the pipeline is communicated with the nozzle; the nozzle is conical, the tip of the cone is a water outlet, a turbine for atomizing water is installed in the conical nozzle, and the top of the nozzle is welded with a turbine cover through ultrasonic. The invention leads water with certain pressure led out by the water tap into the main body, the pipe diameter of the main body is gradually changed, water pressure is increased, the pressurized water is led into the nozzle, the nozzle impacts the turbine to rotate, the water is atomized, and teeth are cleaned.)

1. The utility model provides an oral care tooth flusher which characterized in that: comprises a nozzle, a main body, a handle and a hose; the nozzle is communicated with one end of the main body, the other end of the main body is connected with one end of the handle through the middle plug, and the other end of the handle is connected with the hose through the end plug; one end of the hose penetrates through the handle and is communicated with the main pipeline, and the other end of the hose is communicated with the faucet and is used for providing a water source;

the main body is a pipeline with gradually changed aperture, and the tip of the pipeline is communicated with the nozzle; the nozzle is conical, the tip of the cone is a water outlet, a turbine for atomizing water is installed in the conical nozzle, and the top of the nozzle is welded with a turbine cover through ultrasonic welding;

the turbine comprises a plurality of arc-shaped fan blades which are arranged on the outer circle of the hub at equal intervals; a water inlet channel is formed between two adjacent arc-shaped fan blades and is communicated with the interior of the hub; one surface of each arc-shaped fan blade is an arch surface, the opposite surface of each arc-shaped fan blade is a concave surface, and the arch surface and the concave surface are both arc surfaces; a plurality of arc-shaped columns extending along the vertical direction are distributed on the arc-shaped surface on one arc-shaped fan blade, and a plurality of arc-shaped grooves extending along the vertical direction are formed on the concave surface of the adjacent arc-shaped fan blade;

the main body is provided with three water inlets which are vertically arranged at equal intervals; the three water inlets are distributed on one side of the center line of the cross section of the main body;

a plurality of prismatic columns are uniformly distributed on the inner circle of the hub, and each prismatic column comprises a first regular triangular prism and a second regular triangular prism; the first regular triangular prism and the second regular triangular prism are distributed in a staggered mode, and the size of the first regular triangular prism is larger than that of the second regular triangular prism;

a central shaft is arranged in the hub, and the hub and the central shaft rotate; a central shaft opening for introducing water flow is formed in the side wall of the central shaft, the central shaft opening is communicated with a water outlet groove, and the water outlet groove is communicated with a water outlet channel; the water outlet channel is arranged at the bottom of the central shaft and is communicated with a water spray opening arranged on the hub;

an acute angle formed between the water outlet channel and the horizontal plane is 30-60 degrees; the water spraying opening is conical, the conical tip is communicated with the water outlet channel, and the inclination angle of the water outlet channel is the same as that of the conical side face.

2. The oral care dental irrigator of claim 1, wherein: the other end of the hose is provided with a connector which is communicated with the water faucet, and a control valve for controlling water flow is arranged on the water faucet.

3. The oral care dental irrigator of claim 1, wherein: the middle plug comprises a middle plug outer cylinder and a middle plug inner cylinder, and a middle plug annular groove is formed in a space between the middle plug outer cylinder and the middle plug inner cylinder; two buckles are symmetrically arranged on the inner wall of the inner plug cylinder.

4. The oral care dental irrigator of claim 3, wherein: a clamping groove is formed in one end, far away from the nozzle, of the main body, the main body penetrates through the inner barrel of the middle plug, and the middle plug is fixedly connected with the main body through the matching of the clamping groove and the buckle.

5. The oral care dental irrigator of claim 4, wherein: the top of the handle is embedded into the annular groove of the middle plug, the hose is sleeved on the outer wall of the main body, and the outer wall of the expanded hose is connected with the inner wall of the handle in an adsorption manner.

6. The oral care dental irrigator of claim 1, wherein: the end plug comprises an outer end plug cylinder and an inner end plug cylinder, and an end plug annular groove is formed in a space between the outer end plug cylinder and the inner end plug cylinder; four protruding columns are uniformly distributed on the outer wall of the inner barrel of the end plug; the four protruding columns are in a conical shape, and the tips of the conical shape are arranged upwards.

7. The oral care dental irrigator of claim 6, wherein: the hose penetrates through the inner cylinder of the end plug, the bottom of the handle is embedded in the annular groove of the end plug, and the inner wall of the end plug is connected with the four conical protruding columns in an extruding manner.

Technical Field

The invention belongs to the technical field of tooth rinsers, and particularly relates to an oral care tooth rinser.

Background

Among cleaning products for cleaning teeth, there are electric toothbrushes and manual ordinary toothbrushes. The cleaning products are needed to be used by the toothbrushes of the above types, so that the pregnant women are easy to feel nausea during tooth brushing, and part of the cleaning products have influence on the development of fetuses.

For children, most children do not like brushing teeth after meals and cannot brush teeth cleanly.

For people who have orthodontic teeth and dental implants, the difficulty of tooth brushing and cleaning is high, and the teeth are difficult to clean.

The use of a conventional toothbrush is a painful option for some people with periodontitis or habitual gingival bleeding with tooth brushing. Moreover, the traditional toothbrush can only clean 60% of tooth areas in the oral cavity, and also can clean 40% of dead areas, such as slits between teeth, gingival sulcus, fossa, cavities, wisdom teeth, tooth roots and the like, which can not be cleaned.

The electric tooth flushing device of the same type in the current market needs a power supply to drive a motor to operate, is complex in structure, high in cost, limited in water storage capacity, short in service time and incapable of reaching a cleaning state, and the spray head generally has the conditions of damaging gums, oral mucosa and the like, and the service time is mostly about 1 minute.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned problems in the art and providing an oral cavity rinsing device to solve or improve the above-mentioned problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

an oral care tooth flusher comprises a nozzle, a main body, a handle and a hose; the nozzle is communicated with one end of the main body, the other end of the main body is connected with one end of the handle through the middle plug, and the other end of the handle is connected with the hose through the end plug; one end of the hose penetrates through the handle and is communicated with the main pipeline, and the other end of the hose is communicated with the water tap and is used for providing water source;

the main body is a pipeline with gradually changed aperture, and the tip of the pipeline is communicated with the nozzle; the nozzle is conical, the tip of the cone is a water outlet, a turbine for atomizing water is installed in the conical nozzle, and the top of the nozzle is welded with a turbine cover through ultrasonic welding;

the turbine comprises a plurality of arc-shaped fan blades which are arranged on the outer circle of the hub at equal intervals; a water inlet channel is formed between two adjacent arc-shaped fan blades and is communicated with the interior of the hub; one surface of the arc-shaped fan blade is an arch surface, the opposite surface of the arc-shaped fan blade is a concave surface, and the arch surface and the concave surface are both arc surfaces; a plurality of arc-shaped columns extending along the vertical direction are distributed on the arc-shaped surface on one arc-shaped fan blade, and a plurality of arc-shaped grooves extending along the vertical direction are formed on the concave surface of the adjacent arc-shaped fan blade;

the main body is provided with three water inlets which are vertically arranged at equal intervals; the three water inlets are distributed on one side of the center line of the cross section of the main body;

a plurality of prismatic columns are uniformly distributed on the inner circle of the hub, and each prismatic column comprises a first regular triangular prism and a second regular triangular prism; the first regular triangular prism and the second regular triangular prism are distributed in a staggered mode, and the size of the first regular triangular prism is larger than that of the second regular triangular prism;

a central shaft is arranged in the hub, and the hub and the central shaft rotate; a central shaft opening for introducing water flow is formed in the side wall of the central shaft, the central shaft opening is communicated with a water outlet groove, and the water outlet groove is communicated with a water outlet channel; the water outlet channel is arranged at the bottom of the central shaft and is communicated with a water spray opening arranged on the hub;

an acute angle formed between the water outlet channel and the horizontal plane is 30-60 degrees; the water spraying opening is conical, the conical tip is communicated with the water outlet channel, and the inclination angle of the water outlet channel is the same as that of the conical side face.

Furthermore, the other end of the hose is provided with a connector which is communicated with the water faucet, and a control valve for controlling water flow is arranged on the water faucet.

Further, the middle plug comprises a middle plug outer cylinder and a middle plug inner cylinder, and a middle plug annular groove is formed in a space between the middle plug outer cylinder and the middle plug inner cylinder; two buckles are symmetrically arranged on the inner wall of the inner cylinder of the middle plug.

Furthermore, a clamping groove is formed in one end, far away from the nozzle, of the main body, the main body penetrates through the inner cylinder of the middle plug, and the middle plug is fixedly connected with the main body through the matching of the clamping groove and the buckle.

Further, the top of the handle is embedded into the annular groove of the middle plug, the hose is sleeved on the outer wall of the main body, and the outer wall of the expanded hose is connected with the inner wall of the handle in an adsorption manner.

Furthermore, the end plug comprises an outer end plug cylinder and an inner end plug cylinder, and a space between the outer end plug cylinder and the inner end plug cylinder forms an end plug annular groove; four protruding columns are uniformly distributed on the outer wall of the inner barrel of the end plug; the four protruding columns are in a conical shape, and the tips of the conical shape are arranged upwards.

Furthermore, the hose penetrates through the inner cylinder of the end plug, the bottom of the handle is embedded in an annular groove of the end plug, and the inner wall of the end plug is connected with four conical protruding columns in an extruding mode.

The oral care tooth flusher provided by the invention has the following beneficial effects:

the invention leads water with certain pressure led out by the water tap into the main body, the pipe diameter of the main body gradually changes, the pressure of the water is increased, the pressurized water is led into the nozzle, the nozzle impacts the turbine to rotate, the water is atomized, certain impact force is reduced, and the water is sprayed out through the water outlet at the tip.

After rivers got into the turbine, three water inlet was seted up in one side of main part, and the water inlet is just to the arcwall face or the depressed face of arc flabellum promptly, and not just between two adjacent arc flabellums, so, can be faster with the effect of arc flabellum to promote the arc flabellum and be rotary motion.

Set up a plurality of arc posts on the arcwall face, when rivers and arcwall face effect, the arc face of arc post's level and smooth relatively has more the resistance, promptly under the same water pressure, through the effect of arc post, can increase the impact force of rivers, through reaction force, the rotation of increase turbine.

In a similar way, the action principle of the arc-shaped groove of the concave surface is the same as that of the arc-shaped column, namely, the action force received by the arc-shaped fan blade can be increased no matter the entering water flow acts on the arch surface or the concave surface at the first time, and further the rotating speed of the turbine is accelerated.

Distribute a plurality of positive triangular prisms on wheel hub's interior circle, positive triangular prism includes first positive triangular prism and the positive triangular prism of second staggered arrangement, when rivers get into wheel hub through the water inlet channel in, rivers are under the effect of centrifugal force, circle circular motion in will hugging closely wheel hub, the rivers that flow are under the damping effect of the big one little positive triangular prism of size, form the stirring of undulant form, and then wave the stirring with water for the particle water droplet, the relative not stirred rivers of particle water droplet, it is gentler to the human oral cavity, more be applicable to a plurality of crowds' use, and pregnant woman and child all can use.

The particle droplets enter the water outlet groove through the central shaft opening, the water outlet groove guides the particle droplets into the water outlet channel, the inclination angle of the water outlet channel is the same as that of the water spray nozzle, and under the rotation action, the particle droplets are finally sprayed out in a fan blade shape and act on the oral cavity of a human body; the particle water drops pass through the conical water spraying opening, and the particle water acted on the oral cavity of the human body has certain circular motion under the centrifugal action, so that impurities on the oral cavity can be effectively removed.

Drawings

Fig. 1 is a block diagram of an oral care dental irrigator.

Fig. 2 is an exploded view of the oral care dental irrigator.

Fig. 3 is a cross-sectional view of an oral care dental irrigator.

Fig. 4 is a structure view of a middle plug of the oral care tooth flusher.

Fig. 5 is a block diagram of an end plug of the oral care dental irrigator.

FIG. 6 is a turbine structure view of the oral care dental irrigator.

FIG. 7 is a block diagram of adjacent arcuate blades of the oral care dental irrigator.

Fig. 8 is a water inlet distribution diagram of the oral care dental irrigator.

Fig. 9 is a cross-sectional view of an oral care dental irrigator.

Wherein, 1, a nozzle; 2. a main body; 3. a middle plug; 4. a handle; 5. an end plug; 6. a hose; 7. a connector; 8. a faucet; 9. a control valve; 10. a middle plug annular groove; 11. an end plug annular groove; 12. a middle plug outer cylinder; 13. an inner cylinder of the middle plug; 14. buckling; 15. an end plug outer barrel; 16. an end plug inner barrel; 17. a protruding post; 18. a turbine; 19. a turbine cover; 20. a card slot; 21. a hub; 22. arc-shaped fan blades; 23. an arched surface; 24. a recessed surface; 25. a central shaft; 26. a water inlet channel; 27. a prismatic column; 28. a water jet; 29. a water inlet; 30. an arc-shaped column; 31. an arc-shaped slot; 32. a water outlet channel; 33. a water outlet groove; 34. the middle shaft is open.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

According to one embodiment of the present application, referring to fig. 1-5, the oral care dental irrigator of the present solution comprises a nozzle 1, a main body 2, a handle 4, a hose 6 and a turbine 18.

The nozzle 1 is communicated with one end of the main body 2, the other end of the main body 2 is connected with one end of a handle 4 through a middle plug 3, and the other end of the handle 4 is connected with a hose 6 through an end plug 5; one end of the hose 6 passes through the handle 4 and is in pipe communication with the main body 2, and the other end of the hose 6 is in pipe communication with the water tap 8 for providing a water source having a certain water pressure.

Specifically, main part 2 is a pipeline of aperture gradual change, and the tip and the nozzle 1 intercommunication of pipeline, and after water got into the theme, under the effect of the 2 pipelines of main part of gradual change, with certain degree increase water pressure to water after will the pressure boost is leading-in the nozzle 1.

The nozzle 1 is a cone, the tip of the cone is a water outlet, the turbine 18 is arranged in the cone-shaped nozzle 1, the plurality of arc-shaped fan blades 22 are uniformly distributed on the turbine 18, after water with certain water pressure enters the nozzle 1, the water impacts the turbine 18 to drive the turbine 18 to rotate, the turbine 18 rotates to atomize the water to a certain degree, and the atomized water is sprayed out from the tip of the nozzle 1, and the diameter of the water outlet at the tip of the nozzle 1 is smaller, so that the sprayed water has certain impact force and can be used for cleaning teeth.

A turbine cover 19 is mounted on the top of the nozzle 1, and the turbine cover 19 is fixed to the top of the nozzle 1 by ultrasonic welding.

The hose 6 is kept away from the one end of nozzle 1 and is set up connector 7, and connector 7 and tap 8 intercommunication to install the control valve 9 that is used for controlling discharge on tap 8, through the water yield and the delivery pressure of control valve 9 control tap 8, generally think that the water pressure is also big when the water yield is big, during the use, can adjust water yield and water pressure according to the demand.

The middle plug 3 is used for connecting the main body 2, the handle 4 and the hose 6, the middle plug 3 comprises a middle plug outer cylinder 12 and a middle plug inner cylinder 13, and a middle plug annular groove 10 is formed in a space between the middle plug outer cylinder 12 and the middle plug inner cylinder 13; two buckles 14 are symmetrically arranged on the inner wall of the inner plug barrel 13.

A clamping groove 20 is formed in one end, far away from the nozzle 1, of the main body 2, the main body 2 penetrates through the middle plug inner barrel 13, and the middle plug 3 is fixedly connected with the main body 2 through the matching of the clamping groove 20 and the buckle 14.

The top of the handle 4 is embedded into the annular groove 10 of the middle plug, the hose 6 is sleeved on the outer wall of the main body 2, the end part of the hose 6 expands, the expanded hose 6 is connected with the inner wall of the handle 4 in an adsorption and extrusion manner, the hose 6 is further fixed between the handle 4 and the main body 2, and the handle 4 is connected with the main body 2.

The end plug 5 comprises an end plug outer barrel 15 and an end plug inner barrel 16, and a space between the end plug outer barrel 15 and the end plug inner barrel 16 forms an end plug annular groove 11; four protruding columns 17 are uniformly distributed on the outer wall of the end plug inner barrel 16; four outstanding posts 17 all are the toper form, and the pointed end of toper form sets up, sets up the embedding of the handle 4 of being convenient for up.

The hose 6 passes through the inner barrel 16 of the end plug, the bottom of the handle 4 is embedded in the annular groove 11 of the end plug, and the inner wall of the end plug 5 is connected with four conical protruding columns 17 in an extruding way, namely in an interference fit way.

Referring to fig. 6-9, the turbine 18 includes a plurality of arc-shaped blades 22, and the arc-shaped blades 22 are disposed on the outer circle of the hub 21 at equal intervals; a water inlet channel 26 is formed between two adjacent arc-shaped fan blades 22 and used for guiding water into the hub 21, and the entering water flow forms particle water drops under the stirring action of the arc-shaped fan blades 22.

The water inlet channel 26 is communicated with the interior of the hub 21; one surface of the arc-shaped fan blade 22 is an arc-shaped surface 23, the opposite surface is a concave surface 24, and the arc-shaped surface 23 and the concave surface 24 are both arc-shaped surfaces.

A plurality of arc-shaped columns 30 extending along the vertical direction are distributed on the arc-shaped surface 23 on one arc-shaped fan blade 22, and a plurality of arc-shaped grooves 31 extending along the vertical direction are arranged on the concave surface 24 of the adjacent arc-shaped fan blade 22.

The arc-shaped surface 23 is provided with the arc-shaped columns 30, when water flow acts on the arc-shaped surface 23, the arc-shaped surface of the arc-shaped columns 30 which is smooth relatively has resistance, namely under the same water pressure, the impact force of the water flow can be increased through the action of the arc-shaped columns 30, and the rotation of the turbine is increased through the reaction force.

Similarly, the action principle of the arc groove 31 of the concave surface 24 is the same as that of the arc column 30, that is, the acting force applied to the arc fan blade 22 can be increased no matter the incoming water flow acts on the arc surface 23 or the concave surface 24 for the first time, so as to accelerate the rotation speed of the turbine.

The main body 2 is provided with three water inlets 29 which are vertically arranged at equal intervals; three water inlets 29 are distributed on one side of the midline of the cross section of the main body.

The three water inlets 29 are arranged on one side of the main body, that is, the water inlets 29 are opposite to the arched surface 23 or the concave surface 24 of the arc-shaped fan blade 22, but not opposite to the space between two adjacent arc-shaped fan blades 22, so that the water inlets can more quickly act on the arc-shaped fan blades 22 and push the arc-shaped fan blades 22 to rotate.

A plurality of prismatic columns 27 are uniformly distributed on the inner circle of the hub 21, and the prismatic columns 27 comprise a first regular triangular prism and a second regular triangular prism; first regular triangular prism and the crisscross distribution of second regular triangular prism, and the size of first regular triangular prism is greater than the size of second regular triangular prism, and the staggered arrangement of a height forms the wavy promptly, increases the stirring effect of rivers.

Distribute a plurality of positive triangular prism on wheel hub 21's the interior circle, positive triangular prism includes first positive triangular prism and the positive triangular prism of second of staggered arrangement, when rivers pass through inhalant canal 26 and get into wheel hub 21 in, rivers are under the effect of centrifugal force, circle circular motion in wheel hub 21 will be hugged closely, the rivers that flow are under the damping effect of the big one little positive triangular prism of size, form the stirring of undulant form, and then wave the stirring with water for the particle water droplet, the relative not rivers of stirring of particle water droplet, it is gentler to the human oral cavity, more be applicable to a plurality of crowds' use, and pregnant woman and child all can use.

A central shaft 25 is arranged in the hub 21, and the hub 21 and the central shaft 25 rotate; a central shaft opening 34 for introducing water flow is formed in the side wall of the central shaft 25, the central shaft opening 34 is communicated with the water outlet groove 33, and the water outlet groove 33 is communicated with the water outlet channel 32; the water outlet channel 32 is arranged at the bottom of the central shaft 25 and is communicated with the water spray opening 28 arranged on the hub 21.

An acute angle formed between the water outlet channel 32 and the horizontal plane is 30-60 degrees; the water jet 28 is conical, the tip of the conical shape is communicated with the water outlet channel 32, and the inclination angle of the water outlet channel 32 is the same as that of the conical side surface.

The particle droplets enter the water outlet groove 33 through the central shaft opening 34, the water outlet groove 33 guides the particle droplets into the water outlet channel 32, the inclination angle of the water outlet channel 32 is the same as that of the water spray opening 28, and under the rotation action, the particle droplets are finally sprayed out in a fan-blade shape and act on the oral cavity of the human body; the particle water drops pass through the conical water spraying port 28, the particle water acting on the oral cavity of the human body has certain circular motion under the centrifugal action, and is in a conical fan shape in a rotating state, impurities on the oral cavity can be effectively removed, and the particle water drops are mild, so that the tooth flushing device can mildly and comfortably clean the oral cavity under the action of mild impact water drops, is suitable for the wide development of crowds, and has high practicability.

The present embodiment can be directly connected to various standard water taps 8, and can continuously provide tooth cleaning work. After the water flow is stirred at high speed by the turbine 18, the water molecules formed can clean not only various residues on the teeth but also bacteria which are not visible to the naked eye. Water molecules are sprayed in a conical shape, and cleaning work can be performed at different positions in different angles in the oral cavity. The tooth surface, the tooth inner wall and the tooth gaps can be cleaned at 360 degrees without dead angles. The sprayed conical water mist/water flow increases the cleaning force application area, reduces the bearing pressure, and cleans in the oral cavity like massaging, which is soft and comfortable.

The invention leads water with certain pressure led out by a water tap 8 into a main body 2, the pipe diameter of the main body 2 is gradually changed, the pressure of the water is increased, the pressurized water is led into a nozzle 1, the nozzle 1 impacts a turbine 18 to rotate, the water is atomized, certain impact force is reduced, and the water is sprayed out through a pointed water outlet.

When the tooth cleaner is used, the handle 4 can be held by hand to clean teeth without dead angles, the nozzle 1 is small in size and can completely extend into a cavity to clean teeth without dead angles, and the traditional tooth cleaner and the electric toothbrush have the limit of cleaning.

The water quantity and the water pressure sprayed by the nozzle 1 can be adjusted in real time according to the using population and the using requirement, and the water pressure are adjusted in real time by a pure machine without a power circuit structure, so that the water pressure and the water pressure adjusting device is simple in structure and convenient to maintain.

The water storage device is directly connected with the water tap 8, so that water can be supplied uninterruptedly for a long time, and compared with the traditional tooth flushing device, the water storage device is mostly provided with a water storage structure, the water storage structure has limited water storage, and long-time uninterrupted flushing cannot be realized; the traditional electric toothbrush is completely free of dry cleaning, easily damages gums and cavities and has poor cleaning effect.

While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.