阅读说明：本技术 一种防污性能好的厨房水槽台板及其生产工艺 (Kitchen sink bedplate with good antifouling performance and production process thereof ) 是由 张志明 杨富雪 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种防污性能好的厨房水槽台板及其生产工艺,包括橱柜台板及水槽体,所述橱柜台板上设有水槽开口,水槽开口底部的周围边缘设有第一斜切口,第一斜切口的倾斜角度为45度或135度,水槽体顶部的周围边缘设有第二斜切口,第二斜切口与第一斜切口之间通过第一胶水层紧密粘接连接。本发明通过在第一斜切口及第二斜切口之间用第一胶水层紧密粘接连接,采用切口贴合粘接的方式,大大提高了橱柜台板与水槽体之间缝隙的紧密度,从橱柜台板表面上看不到拼接缝隙,外形美观,而且防污性能好,有效防止橱柜台板上的污水通过缝隙流入至橱柜底部的水槽柜内；本发明制备的胶水具有强力的粘合度,使橱柜台板与水槽体之间拼接的缝隙不易开裂。(The invention discloses a kitchen sink bedplate with good antifouling performance and a production process thereof, and the kitchen sink bedplate comprises a cabinet bedplate and a sink body, wherein a sink opening is arranged on the cabinet bedplate, a first inclined notch is arranged on the peripheral edge of the bottom of the sink opening, the inclination angle of the first inclined notch is 45 degrees or 135 degrees, a second inclined notch is arranged on the peripheral edge of the top of the sink body, and the second inclined notch is tightly bonded and connected with the first inclined notch through a first glue layer. According to the invention, the first glue layer is tightly bonded and connected between the first oblique notch and the second oblique notch, and the notch bonding mode is adopted, so that the tightness of a gap between the cabinet bedplate and the water tank body is greatly improved, the splicing gap cannot be seen from the surface of the cabinet bedplate, the appearance is attractive, the antifouling performance is good, and the sewage on the cabinet bedplate is effectively prevented from flowing into the water tank cabinet at the bottom of the cabinet through the gap; the glue prepared by the invention has strong adhesion, so that a spliced gap between the cabinet bedplate and the water tank body is not easy to crack.)

1. A kitchen sink platen that antifouling performance is good which characterized in that: the water tank is tightly bonded to the bottom of the opening of the water tank through glue, and the horizontal height of the end surface of the top of the cabinet bedplate is greater than that of the end surface of the top of the water tank;

wherein, the edge around basin opening bottom is equipped with first scarf, the inclination of first scarf is 45 degrees or 135 degrees, the edge around the basin body top is equipped with the second scarf, the inclination of second scarf is the same with the inclination of first scarf, through the inseparable adhesive bonding connection of first glue layer between second scarf and the first scarf, laminating gap outside corner between first scarf and the second scarf is equipped with the second glue layer.

2. The kitchen sink deck of claim 1, wherein said deck further comprises: the bottom of the water tank body is provided with a water leakage hole, and a hole cover plate is covered on the water leakage hole.

3. The kitchen sink deck of claim 1, wherein said deck further comprises: the shape of the opening of the water tank is one of rectangle, ellipse, circle or polygon.

4. The kitchen sink deck of claim 1, wherein said deck further comprises: the peripheral edge of the cabinet bedplate is provided with a chamfer structure for preventing cutting injury.

5. The kitchen sink deck of claim 1, wherein said deck further comprises: the periphery of the opening of the water tank of the cabinet bedplate is provided with a first arc transition surface.

6. The kitchen sink deck of claim 1, wherein said deck further comprises: and a second arc transition surface is arranged at the bottom edge of the water tank body.

7. The kitchen sink deck of claim 1, wherein said deck further comprises: the cabinet bedplate is made of artificial stone or quartz stone bedplate.

8. The kitchen sink deck of claim 1, wherein said deck further comprises: the water tank body is made of artificial marble materials or metal.

9. The production process of the kitchen sink bedplate with good antifouling property according to claims 1 to 8, wherein the production process comprises the following steps: the method comprises the following steps:

1) a water tank opening is formed in the cabinet bedplate, a first inclined cut is formed in the peripheral edge of the bottom of the water tank opening in an inclined mode, and burrs and chips on the first inclined cut are removed;

2) obliquely arranging a second oblique notch on the peripheral edge of the top of the water tank body, removing burrs and scraps on the second oblique notch, then respectively coating glue at the bottom of the first oblique notch and the top of the second oblique notch, and aligning the second oblique notch to the first oblique notch for tight fitting;

3) glue is smeared on the edge of the joint gap of the outer side wall between the first oblique notch and the second oblique notch, so that the water tank body is tightly bonded on the cabinet bedplate;

4) and (3) placing the cabinet bedplate and the water tank body in a drying room for curing treatment, wherein the drying temperature in the drying room is 45-65 ℃, and the drying time is 24-36 h.

10. The process for producing a kitchen sink deck with good antifouling property according to claim 9, wherein the process comprises the following steps: the glue comprises the following components in percentage by mass: unsaturated resin: 64-72%, 10-14% of silica micro powder, 500-mesh aluminum hydroxide powder: 12-18% of color paste, 1-2% of titanium dioxide, 2-3% of curing assistant, 2-4% of coupling agent and 0.5-1% of defoaming agent;

the preparation process of the glue comprises the following steps: adding unsaturated resin into a stirring barrel for high-speed stirring, wherein the stirring speed is 800-1000 r/min, stirring for 5-10 min, then adding silica micro powder and 500-mesh aluminum hydroxide powder, adjusting the stirring speed to 900-1300 r/min, continuously stirring for 15-25 min, then sequentially adding color paste, titanium dioxide, curing assistant, defoaming agent and coupling agent in sequence, and continuously stirring for 20-30 min according to the original stirring speed to finally obtain a glue finished product, wherein the viscosity of the glue is 20000-30000 mpa · s.

Technical Field

The invention relates to the technical field of kitchen sinks, in particular to a kitchen sink bedplate with good antifouling performance and a production process thereof.

Background

As is well known, the whole cabinet has wide use in life, a beautiful, good-performance and clean cabinet table-board, and is very important for building a comfortable and warm kitchen. In the prior art, the sink on the cabinet platen is usually installed in the following three ways:

the first is a basin on a table, namely a water tank is placed on a table board from top to bottom, the peripheral edge of the water tank is higher than the table board due to the skirt edge of the water tank, so that the overall appearance of the water tank is not smooth and attractive, water on the table board cannot smoothly flow into the water tank in the use process, the water accumulation phenomenon of the table board of a cabinet is caused, and the antifouling effect is poor;

the second type is a basin in a table, the table top is polished according to the size of the skirt edge of the water tank, the skirt edge and the table top are connected through a bonding agent, and the skirt edge of the water tank and the table top are positioned on the same horizontal plane, so that the appearance is attractive, the table top has no water accumulation phenomenon and is convenient to clean, but a gap between the skirt edge of the water tank and the table top has fragments, is not easy to clean and leak water, so that the table top is contaminated, and sewage can enter the gap and permeate into a water tank cabinet or a cooking table cabinet, so that the integral water seepage prevention performance is poor;

the third kind is basin under the platform, it is just that the fastening is detained from up fixing the basin to cupboard mesa below down, it is pleasing to the eye to have the outward appearance equally, the cupboard mesa does not have ponding, be convenient for clean the advantage such as, and adopt the fastening to detain the installation basin, though can prop to hold and be fixed in between basin and the mesa so that the basin is installed more firmly, nevertheless need to bore the back and fix the fastening knot on the mesa through the screw fastening and detain fixed shirt rim, not only intensity and basin bearing capacity are still lower, it is very troublesome to install simultaneously, difficult location, cause the material extravagant easily.

Accordingly, the prior art is deficient and needs improvement.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the kitchen sink bedplate has the advantages of simple structure, reduction of water accumulation on the cupboard tabletop, good water seepage prevention effect, high structural strength, convenience in positioning and installation and attractive appearance, and has good antifouling performance, and the production process thereof.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a kitchen sink table board with good antifouling performance comprises a cabinet table board and a sink body, wherein a sink opening is formed in the cabinet table board, the sink body is tightly bonded to the bottom of the sink opening through glue, and the horizontal height of the top end surface of the cabinet table board is larger than that of the top end surface of the sink body;

wherein, the edge around basin opening bottom is equipped with first scarf, the inclination of first scarf is 45 degrees or 135 degrees, the edge around the basin body top is equipped with the second scarf, the inclination of second scarf is the same with the inclination of first scarf, through the inseparable adhesive bonding connection of first glue layer between second scarf and the first scarf, laminating gap outside corner between first scarf and the second scarf is equipped with the second glue layer.

Preferably, the bottom of the water tank body is provided with a water leakage hole, and the upper cover of the water leakage hole is provided with a hole cover plate.

Preferably, the shape of the sink opening is one of rectangular, oval, circular, or polygonal.

Preferably, the peripheral edge of the cabinet bedplate is provided with a chamfer structure for preventing cutting injury.

Preferably, the periphery of the sink opening of the cabinet bedplate is provided with a first arc transition surface.

Preferably, the bottom edge of the water tank body is provided with a second arc transition surface.

Preferably, the cabinet bedplate is made of artificial stone or quartz stone bedplate.

Preferably, the water tank body is made of artificial marble materials or metal.

The invention also provides a production process of the kitchen sink bedplate with good antifouling property, and the specific technical scheme is as follows:

a production process of a kitchen sink bedplate with good antifouling property comprises the following steps:

1) a water tank opening is formed in the cabinet bedplate, a first inclined cut is formed in the peripheral edge of the bottom of the water tank opening in an inclined mode, and burrs and chips on the first inclined cut are removed;

2) obliquely arranging a second oblique notch on the peripheral edge of the top of the water tank body, removing burrs and scraps on the second oblique notch, then respectively coating glue at the bottom of the first oblique notch and the top of the second oblique notch, and aligning the second oblique notch to the first oblique notch for tight fitting;

3) glue is smeared on the edge of the joint gap of the outer side wall between the first oblique notch and the second oblique notch, so that the water tank body is tightly bonded on the cabinet bedplate;

4) and (3) placing the cabinet bedplate and the water tank body in a drying room for curing treatment, wherein the drying temperature in the drying room is 45-65 ℃, and the drying time is 24-36 h.

Preferably, the glue comprises the following components in percentage by mass: unsaturated resin: 64-72%, 10-14% of silica micro powder, 500-mesh aluminum hydroxide powder: 12-18% of color paste, 1-2% of titanium dioxide, 2-3% of curing assistant, 2-4% of coupling agent and 0.5-1% of defoaming agent;

the preparation process of the glue comprises the following steps: adding unsaturated resin into a stirring barrel for high-speed stirring, wherein the stirring speed is 800-1000 r/min, stirring for 5-10 min, then adding silica micro powder and 500-mesh aluminum hydroxide powder, adjusting the stirring speed to 900-1300 r/min, continuously stirring for 15-25 min, then sequentially adding color paste, titanium dioxide, curing assistant, defoaming agent and coupling agent in sequence, and continuously stirring for 20-30 min according to the original stirring speed to finally obtain a glue finished product, wherein the viscosity of the glue is 20000-30000 mpa · s.

Compared with the prior art, the kitchen cabinet has the advantages that the first oblique notch is formed in the peripheral edge of the water tank opening of the cabinet table plate, the second oblique notch is formed in the peripheral edge of the top of the water tank body, the first oblique notch and the second oblique notch are equal in inclination angle and are both 45 degrees or 135 degrees, the first oblique notch and the second oblique notch are tightly bonded and connected through the first glue layer, the tightness of a gap between the cabinet table plate and the water tank body is greatly improved by adopting a notch bonding mode, the splicing gap cannot be seen from the surface of the cabinet table plate, the appearance is attractive, the antifouling performance is good, sewage on the cabinet table plate is effectively prevented from flowing into the water tank cabinet at the bottom of the cabinet through the gap, and the practicability is high; meanwhile, a second glue layer is arranged at the corner outside the joint gap between the first oblique notch and the second oblique notch, and the arrangement of the second glue layer effectively enhances the structural strength of the connection between the cabinet bedplate and the water tank body, prevents the water tank body from falling off from the cabinet bedplate when the water tank body is filled with water or a heavy object is placed, and is high in safety; the glue prepared by the invention has strong adhesion, so that a spliced gap between the cabinet bedplate and the water tank body is not easy to crack, the integral sense is consistent, and the production quality of the cabinet bedplate with the water tank is effectively improved.

Drawings

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

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic cross-sectional view showing the structure of example 1 of the present invention;

fig. 4 is a schematic cross-sectional structure diagram of embodiment 2 of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a kitchen sink deck with good antifouling performance, including a cabinet deck 1 and a water tank body 2, where the cabinet deck 1 is provided with a water tank opening 10, the water tank body 2 is tightly bonded at the bottom of the water tank opening 10 by glue, and a horizontal height of a top end surface of the cabinet deck 1 is greater than a horizontal height of a top end surface of the water tank body 2.

Wherein, the edge around basin opening 10 bottom is equipped with first scarf 11, the inclination of first scarf 11 is 45 degrees or 135 degrees, the edge around the 2 tops of basin body is equipped with second scarf 21, the inclination of second scarf 21 is the same with the inclination of first scarf 11, through the inseparable bonding connection of first glue layer 31 between second scarf 21 and the first scarf 11, laminating gap outside corner between first scarf 11 and the second scarf 21 is equipped with second glue layer 32. In the embodiment, the first oblique notch 11 and the second oblique notch 21 are closely bonded and connected through the first glue layer 31, and the notch bonding mode is adopted, so that the tightness of the gap between the cabinet bedplate 1 and the water tank body 2 is greatly improved, the splicing gap cannot be seen from the surface of the cabinet bedplate 1, the appearance is attractive, the antifouling performance is good, the sewage on the cabinet bedplate 1 is effectively prevented from flowing into a water tank cabinet at the bottom of the cabinet through the gap, and the practicability is high; simultaneously, laminating gap outside corner between first scarf 11 and second scarf 21 is equipped with second glue layer 32, and the structural strength who is connected between cabinet platen 1 and the water tank body 2 has effectively been strengthened in the setting of second glue layer 32, prevents to hold full water or when placing the heavy object in the water tank body 2, and water tank body 2 drops from cabinet platen 1, and the security is high.

Furthermore, the bottom of the water tank body 2 is provided with a water leakage hole 22, and a hole cover plate 23 is covered on the water leakage hole 22. In this embodiment, the sewage on the tank body 2 can be discharged from the water leakage holes 22, and the arrangement of the hole cover plate 23 can prevent impurities mixed in the sewage from blocking the drainage pipeline.

Further, the shape of the sink opening 10 is one of a rectangle, an ellipse, a circle, and a polygon. In this embodiment, the water tank opening 10 is rectangular, and correspondingly, the overall shape of the water tank body 2 is also rectangular.

Furthermore, the peripheral edge of the cabinet bedplate 1 is provided with a chamfer structure 12 for preventing cutting injury.

Further, the periphery of the sink opening 10 of the cabinet platen 1 is provided with a first arc transition surface 100. In this embodiment, the first arc transition surface 100 is configured to prevent the sharp edge of the sink opening 10 from scratching the hand of a person.

Further, a second arc transition surface 24 is arranged at the bottom edge of the water tank body 2. In this embodiment, the second arc transition surface 24 is provided to facilitate people to clean the residue in the corner gap of the water tank 2.

Further, the cabinet bedplate 1 is made of artificial stone or quartz stone bedplate. In this embodiment, the cabinet board 1 is made of artificial stone.

Further, the water tank body 2 is made of artificial marble materials or metal. In this embodiment, the water tank body 2 is made of artificial marble.

Specifically, the production process of the kitchen sink bedplate with good antifouling property comprises the following steps:

1) a water tank opening is formed in the cabinet bedplate, a first inclined cut is formed in the peripheral edge of the bottom of the water tank opening in an inclined mode, and burrs and chips on the first inclined cut are removed;

2) obliquely arranging a second oblique notch on the peripheral edge of the top of the water tank body, removing burrs and scraps on the second oblique notch, then respectively coating glue at the bottom of the first oblique notch and the top of the second oblique notch, and aligning the second oblique notch to the first oblique notch for tight fitting;

3) glue is smeared on the edge of the joint gap of the outer side wall between the first oblique notch and the second oblique notch, so that the water tank body is tightly bonded on the cabinet bedplate;

4) and (3) placing the cabinet bedplate and the water tank body in a drying room for curing treatment, wherein the drying temperature in the drying room is 45 ℃, and the drying time is 36 h.

Further, the glue comprises the following components in percentage by mass: unsaturated resin: 64%, silica micropowder 14%, 500 mesh aluminum hydroxide powder: 12 percent of color paste, 1 percent of titanium dioxide, 3 percent of curing assistant, 4 percent of coupling agent and 1 percent of defoaming agent;

the preparation process of the glue comprises the following steps: adding unsaturated resin into a stirring barrel for high-speed stirring, wherein the stirring speed is 800r/min, stirring for 10min, then adding silica micro powder and 500-mesh aluminum hydroxide powder, adjusting the stirring speed to 900r/min, continuously stirring for 25min, then sequentially adding color paste, titanium dioxide, a curing assistant, a defoaming agent and a coupling agent, and continuously stirring for 20min according to the original stirring speed to finally obtain a glue finished product, wherein the viscosity of the glue is 20000mpa · s.

Example 2

As shown in fig. 1, 2 and 4, the present embodiment provides a kitchen sink deck with good antifouling performance, including a cabinet deck 1 and a water tank body 2, where the cabinet deck 1 is provided with a water tank opening 10, the water tank body 2 is tightly adhered to the bottom of the water tank opening 10 through glue, and a horizontal height of a top end surface of the cabinet deck 1 is greater than a horizontal height of a top end surface of the water tank body 2.

Wherein, the edge around basin opening 10 bottom is equipped with first scarf 11, the inclination of first scarf 11 is 45 degrees or 135 degrees, the edge around the 2 tops of basin body is equipped with second scarf 21, the inclination of second scarf 21 is the same with the inclination of first scarf 11, through the inseparable bonding connection of first glue layer 31 between second scarf 21 and the first scarf 11, laminating gap outside corner between first scarf 11 and the second scarf 21 is equipped with second glue layer 32. In the embodiment, the first oblique notch 11 and the second oblique notch 21 are closely bonded and connected through the first glue layer 31, and the notch bonding mode is adopted, so that the tightness of the gap between the cabinet bedplate 1 and the water tank body 2 is greatly improved, the splicing gap cannot be seen from the surface of the cabinet bedplate 1, the appearance is attractive, the antifouling performance is good, the sewage on the cabinet bedplate 1 is effectively prevented from flowing into a water tank cabinet at the bottom of the cabinet through the gap, and the practicability is high; simultaneously, laminating gap outside corner between first scarf 11 and second scarf 21 is equipped with second glue layer 32, and the structural strength who is connected between cabinet platen 1 and the water tank body 2 has effectively been strengthened in the setting of second glue layer 32, prevents to hold full water or when placing the heavy object in the water tank body 2, and water tank body 2 drops from cabinet platen 1, and the security is high.

Furthermore, the bottom of the water tank body 2 is provided with a water leakage hole 22, and a hole cover plate 23 is covered on the water leakage hole 22. In this embodiment, the sewage on the tank body 2 can be discharged from the water leakage holes 22, and the arrangement of the hole cover plate 23 can prevent impurities mixed in the sewage from blocking the drainage pipeline.

Further, the shape of the sink opening 10 is one of a rectangle, an ellipse, a circle, and a polygon. In this embodiment, the shape of the water tank opening 10 is rectangular. Of course, it should be noted that the user may also set the shape of the sink opening 10 to be oval, circular or polygonal, so that the sink opening is adapted to the structure of the sink body 2.

Furthermore, the peripheral edge of the cabinet bedplate 1 is provided with a chamfer structure 12 for preventing cutting injury.

Further, the periphery of the sink opening 10 of the cabinet platen 1 is provided with a first arc transition surface 100. In this embodiment, the first arc transition surface 100 is configured to prevent the sharp edge of the sink opening 10 from scratching the hand of a person.

Further, a second arc transition surface 24 is arranged at the bottom edge of the water tank body 2. In this embodiment, the second arc transition surface 24 is provided to facilitate people to clean the residue in the corner gap of the water tank 2.

Further, the cabinet bedplate 1 is made of artificial stone or quartz stone bedplate. In this embodiment, the cabinet platen 1 is made of a quartz stone platen.

Further, the water tank body 2 is made of artificial marble materials or metal. In this embodiment, the water tank body 2 is made of metal.

Specifically, the production process of the kitchen sink bedplate with good antifouling property comprises the following steps:

1) a water tank opening is formed in the cabinet bedplate, a first inclined cut is formed in the peripheral edge of the bottom of the water tank opening in an inclined mode, and burrs and chips on the first inclined cut are removed;

2) obliquely arranging a second oblique notch on the peripheral edge of the top of the water tank body, removing burrs and scraps on the second oblique notch, then respectively coating glue at the bottom of the first oblique notch and the top of the second oblique notch, and aligning the second oblique notch to the first oblique notch for tight fitting;

3) glue is smeared on the edge of the joint gap of the outer side wall between the first oblique notch and the second oblique notch, so that the water tank body is tightly bonded on the cabinet bedplate;

4) and (3) placing the cabinet bedplate and the water tank body in a drying room for curing treatment, wherein the drying temperature in the drying room is 65 ℃, and the drying time is 24 hours.

Further, the glue comprises the following components in percentage by mass: unsaturated resin: 69.5%, fine silica powder 10%, 500 mesh aluminum hydroxide powder: 12 percent of color paste, 2 percent of titanium dioxide, 2 percent of curing assistant, 2 percent of coupling agent and 0.5 percent of defoaming agent;

the preparation process of the glue comprises the following steps: adding unsaturated resin into a stirring barrel for high-speed stirring, wherein the stirring speed is 1000r/min, stirring for 5min, then adding silica micro powder and 500-mesh aluminum hydroxide powder, adjusting the stirring speed to 1300r/min, continuously stirring for 15min, then sequentially adding color paste, titanium dioxide, a curing assistant, a defoaming agent and a coupling agent, and continuously stirring for 30min according to the original stirring speed to finally obtain a glue finished product, wherein the viscosity of the glue is 30000mpa · s.

Comparative example 1

The kitchen sink deck according to comparative example 1, which is excellent in stain-proofing performance, is different from example 1 in that the inclination angle of the first chamfered portion and the second chamfered portion is 75 degrees.

Comparative example 2

The kitchen sink deck according to comparative example 2 is different from example 2 in that the inclination angle of the first chamfer and the second chamfer is 120 degrees.

Comparative example 3

The manufacturing process of the kitchen sink deck according to the comparative example 3, which is different from the manufacturing process of the example 1 in that the step 3) is omitted.

Comparative example 4

The production process of the kitchen sink deck plate with good antifouling property in the comparative example 4 is different from the production process of the example 2 in that aluminum hydroxide powder in glue is 400 meshes.

The performance tests of the kitchen sink platens having good stain properties prepared in examples 1-2 and comparative examples 1-4 were performed, and the results are shown in table 1 below:

compared with the prior art, the kitchen cabinet has the advantages that the first oblique notch is formed in the peripheral edge of the water tank opening of the cabinet table plate, the second oblique notch is formed in the peripheral edge of the top of the water tank body, the first oblique notch and the second oblique notch are equal in inclination angle and are both 45 degrees or 135 degrees, the first oblique notch and the second oblique notch are tightly bonded and connected through the first glue layer, the tightness of a gap between the cabinet table plate and the water tank body is greatly improved by adopting a notch bonding mode, the splicing gap cannot be seen from the surface of the cabinet table plate, the appearance is attractive, the antifouling performance is good, sewage on the cabinet table plate is effectively prevented from flowing into the water tank cabinet at the bottom of the cabinet through the gap, and the practicability is high; meanwhile, a second glue layer is arranged at the corner outside the joint gap between the first oblique notch and the second oblique notch, and the arrangement of the second glue layer effectively enhances the structural strength of the connection between the cabinet bedplate and the water tank body, prevents the water tank body from falling off from the cabinet bedplate when the water tank body is filled with water or a heavy object is placed, and is high in safety; the glue prepared by the invention has strong adhesion, so that a spliced gap between the cabinet bedplate and the water tank body is not easy to crack, the integral sense is consistent, and the production quality of the cabinet bedplate with the water tank is effectively improved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.