AIR CELL MODULE FOR AIR MATTRESS CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent 5 Application No. 10-2015-0015452, filed on January 30, 2015, the disclosure of which is incorporated herein by reference in its entirety. BACKGROUND 1. Field of the Invention 10 The present invention relates to an air cell module for an air mattress which can reinforce the strength of an air mattress so as to prevent contact between side surfaces of air cells and minimize deformation of an air cell caused by a load thereon, when the air cells are expanded. 15 2. Discussion of Related Art Generally, an air mattress is a means for a user to rest thereon by providing proper cushioning by air pressure formed inside by air injection, and is used widely due to merits such as portability and less worry about the installation place. The mattress includes a bed type used for a bed and a mat type used for a 20 sitting mat. Particularly, an air mattress includes a plurality of air pockets, and the air pocket includes a cushion portion and a bottom plate fused to a lower surface of a cushion portion. In addition, an air injection hole for injecting air into an inside of each air 25 pocket is formed on the cushion portion or one side portion of the bottom plate, and 1 each air pocket communicates with each other through a communication passage, and the air pocket is inflated by the air injected from the air injection hole through the communication passage. This type of a conventional air mat is disclosed in Korean Patent Application 5 No. 10-1145330 registered on May, 4, 2012 and entitled "AIR MAT AND AIR MAT MANUFACTURING DEVICE AND MANYFACTURING METHOD THEREOF" (hereinafter, referred to as "conventional technology"). The conventional technology described above injects a resin composition into a mold, fastens a cover, and rotates the mold at a certain orbit, therefore a 10 cushion portion is formed and the resin composition simultaneously moves to the cover portion by the resin composition spreading uniformly in the mold by a centrifugal force in the rotating process, and finally, the air mattress which has an integrated body including the bottom plate and the cushion portion is produced. A conventional air mattress according to the structure described above 15 fulfills a cushioning function by peripheral surfaces expanding in a width direction by being compressed in a longitudinal direction when contact surfaces, which are the uppermost end of a cushion portion, in an air pocket communicating with each other are pressurized. In this case, since the inside air may be expanded by applied pressure, and 20 central portions of the peripheral surfaces may expand and contact the peripheral surfaces of adjacent air pockets, a sufficient cushion is not provided due to interference between the adjacent peripheral surfaces. Furthermore, particularly when a load is placed on a corner portion of a contact surface on which a load of a user is placed, the load may be centralized on 25 the corner portion, and in this case, an original strength is not retained as the corner 2 portion of the contact surface acts as a weak point and the corner portion collapses or deforms. SUMMARY OF THE INVENTION 5 The present invention is directed to an air cell module for an air mattress in which non-contact inducing portions formed on supporting portions of adjacent air cells prevent contact between the adjacent supporting portions by the non-contact inducing portions having concave portions formed in a concave shape in an opposite direction or a pleat portions formed in a longitudinal direction on the adjacent 10 supporting portions, and the concave portions or the pleat portions accommodating expansion of the supporting portions. In addition, the present invention is directed to an air cell module for an air mattress in which reinforcing portions formed on a top surface portion and supporting portions of an air cell reinforces the strength of the air cell by reinforcing 15 the resistance against the load of a user. In addition, the present invention is directed to an air cell module for an air mattress in which a stretching cell formed on an upper portion of air cells relieves a feeling of fatigue by providing an acupressure effect on, particularly, the lumbar region of the body of a user using expansion and contraction of the stretching cell. 20 In addition, the present invention is directed to an air cell module for an air mattress induces a deep sleep by a stretching cell supporting air cells by supplementing the supporting heights thereof in which a flexure change of a body such as the lumbar region is large. According to an aspect of the present invention, there is provided an air cell 25 module for an air mattress which includes an air cell including a top surface portion, 3 supporting portions connected to the top surface portion so as to form side surface portions, and a bottom surface portion connected to lower portions of the supporting portions, and non-contact inducing portions formed on the supporting portions of the air cell so as to prevent contact between adjacent air cells. 5 In an embodiment of the present invention, the non-contact inducing portions are formed on the supporting portions which face each other at the adjacent air cells AC, and include a concave portion recessed in an opposite direction. In another embodiment of the present invention, the non-contact inducing portions include pleat portions formed on the supporting portions which face each 10 other at the adjacent air cells AC. According to another aspect of the present invention, there is provided an air cell module for an air mattress which includes an air cell including a top surface portion, supporting portions connected to the top surface portion so as to form side surface portions, and a bottom surface portion connected to lower portions of the 15 supporting portions 20, and reinforcing portions formed on one or both of the top surface portion and the supporting portions of the air cell so as to reinforce supporting power. In an embodiment of the present invention, the reinforcing portions include a plurality of reinforcing grooves connecting from the top surface portion to the 20 supporting portions. In another embodiment of the present invention, a plurality of air cells are disposed in a row or in rows. In still another embodiment of the present invention, the air cell module for an air mattress further includes a stretching cell disposed on upper portions of the air 25 cells so as to support a lumbar region of a user. 4 In yet another embodiment of the present invention, the stretching cell is expanded or contracted independently in each of the air cells. BRIEF DESCRIPTION OF THE DRAWINGS 5 The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which: FIG. 1 is a perspective view showing air cells for an air mattress according to 10 an exemplary embodiment of the present invention; FIG. 2 is a plan view showing air cells for an air mattress according to an exemplary embodiment of the present invention; FIG. 3 is side view showing air cells for an air mattress according to an exemplary embodiment of the present invention; 15 FIG. 4 is a cross-sectional view showing an operation state of non-contact inducing portions according to an exemplary embodiment of the present invention; FIG. 5 is a cross-sectional view showing a modification of the non-contact inducing portions according to another exemplary embodiment of the present invention; 20 FIGS. 6 and 7 are perspective views showing a stretching cell according to an exemplary embodiment of the present invention; and FIG. 8 is a side view showing an operation state of the stretching cell according to an exemplary embodiment of the present invention. 25 DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 5 Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. While the present invention is shown and described in connection with exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications can be made without 5 departing from the spirit and scope of the invention. An air cell module for an air mattress according to the present invention as described above will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 to 8, the air cell module for an air mattress according to 10 the present invention includes air cells AC which include top surface portions 10, supporting portions 20 connected to the top surface portion 10 and forming air chambers in inner spaces, and bottom surface portions 30 connecting to lower portions of the supporting portions 20, and non-contact inducing portions 40 formed on the supporting portions 20 of the air cell AC. 15 According to the present invention, as shown in FIGS. 1 to 3, the top surface portion 10 of the air cell AC is a portion contacting a body of a user directly or indirectly. In this case, although the top surface portion 10 may be made into various shapes such as a polygon or circle, or a non-circular shape such as ellipse, the top 20 surface portion 10 in the accompanying drawing is shown as a tetragonal shape. Then, as shown in FIGS. 1 to 3 according to the present invention, the supporting portions 20 of the air cell AC are connected to each of the corners of the top surface portion 10, and form side surface portions of the air cell AC disposed downward therefrom. 6 In this case, although a shape of the supporting portions 20 may be varied according to shape of the top surface portion 10, in the present invention, as shown in FIG. 1, a tetragonal shape is the basic shape of the top surface portion 10 and accordingly, the supporting portions 20 which are formed along four sides form the 5 side surface portions of the air cell AC. In addition, as shown in FIGS. 1 to 3 according to the present invention, a bottom surface portion 30 of the air cell AC is connected to lower ends of the supporting portions 20 and forms the bottom surface of the air cell AC. In this case, a fusion portion 21 extending to the outer direction and 10 surrounding lower end portions of the supporting portions 20 is formed on the lower ends of the supporting portions 20, and the fusion portion 21 and the bottom surface portion 30 are fused by high frequency welding. That is, the air cell AC according to the present invention is a unit cell including the top surface portion 10, the supporting portions 20, and the bottom 15 surface portion 30, and the air chamber C is formed in the inner space thereof, and when a certain amount of air is injected in the air chamber C, the air cell AC serves as a cushion as a certain pressure is formed. The air cell module according to the present invention, as described above, is formed with a plurality of air cells AC of a unit cell type disposed in a row or rows. 20 In this case, although the air cell module formed with two rows is shown in the accompanying drawing, a single row, three rows, four rows, etc. of the air cells AC may be disposed according to necessity. In addition, to form the air cell module according to the present invention, the bottom surface portion 30 is formed with a plate-shape member, and a coupling 25 portion 35 protruding to the outside is formed at the edge thereof, and a fixing hole 7 35a is formed on the coupling portions 35 and fixed to a main body (not shown) of the air mattress by fastening using a bolt or a nut. In addition, the supporting portions 20 of the each air cell AC include communication portions 31 connecting to the adjacent supporting portions 20, and 5 adjacent air chambers C communicate through the communication portion 31. In addition, in the case in which the air cell module is disposed in two rows as shown in accompanying drawing, the communication portions 31 may connect the supporting portions 20 disposed in the same row in a back and forth direction, and connect the supporting portions 20 disposed in a different row therefrom. 10 According to necessity, the communication portions 31 may connect the supporting portions 20 disposed in the same row in a back and forth direction, or connect the supporting portions 20 disposed on a different row therefrom. In addition, when the supporting portions 20 and the bottom surface portion 30 are fused, it is preferable that the communication portions 31 are fused to the 15 bottom surface portion 30. In addition, an injection hole for injecting air is formed on the bottom surface portion 30, and a first nozzle 33 connected to an air pump is mounted on the injection hole, and air injected by the first nozzle 33 may flow into/out of each air chamber C through the communication portions 31. 20 In addition, as shown in FIGS. 1 to 3, when the air cell module is disposed in a plurality of rows, although the first nozzle 33 may be provided with each row or as only one for the plurality of rows. However, in this case, when air is injected, it is advantageous that the nozzle is provided for each row in consideration of an injection speed, etc. (see FIG. 3). 8 Particularly, as shown in FIGS. 1, 2, and 4, non-contact inducing portions 40 are formed on the air cell AC according to the present invention, wherein the non contact inducing portions 40 are formed on the supporting portions 20 adjacent to each other, and prevent contact with each other when the supporting portions 20 5 expand. Generally an air cell AC maintains a shape and serves as a cushion by air pressure injected in an air chamber C. In this case, when a load of a user is applied, the air cell AC serves as a cushion by a certain deformation occurring because an air injected in the air chamber 10 C does not escape therefrom. This type of deformation of the air cell AC mostly occurs at the supporting portions 20 forming side surface portions of the air cell AC. At this time, the deformation of the supporting portions 20 may occur where air, moved from a point at which a load is applied directly, fills, in addition to a point 15 where a load is applied directly. In addition, the shape of deformation of the supporting portions 20 of the air cell AC mostly appears as a shape of the supporting portions 20 inflated in an outer direction. In this case, when the adjacent supporting portions 20 are inflated or 20 inflation is large as a heavy load is applied, contact between the adjacent supporting portions 20 may occur, and the contact between the adjacent supporting portions 20 may function as an impediment to serving as a normal cushion. Therefore, the present invention may solve the above-described problem, occurring when the adjacent supporting portions 20 contact each other, in one action 25 by introducing the non-contact inducing portions 40 to the air cell AC. 9 To this end, the non-contact inducing portions 40 according to the present invention include concave portions 41 of a concave shape in an opposite direction to the adjacent supporting portions 20. The concave portions 41 are formed on the front and the rear surfaces of the 5 supporting portions 20 according to the longitudinal direction of the air cell module based on FIGS. 1 and 2. That is, the concave portions 41 of the non-contact inducing portions 40 face front and rear surfaces of the adjacent supporting portions 20, and are disposed to be recessed in front and rear directions, and form space portions, similar to an ellipse 10 with a major axis, spaced apart from each other. Therefore, as described above, when the deformation of the supporting portions 20 occurs, the concave portions 41 occupy a certain space of the space portions inflated in an outer direction by as much as the recessed volume. In addition, the concave portions 41 of the non-contact inducing portion 40 15 have a large resistance against a load applied from vertical direction compared to the supporting portions 20 of a planar shape because of having a certain curvature on a vertical axis, therefore, when the load of a user is applied, the concave portions 41 of the non-contact inducing portions 40 additionally serve to reinforce strength to prevent buckling in a vertical direction or a crushing phenomenon. 20 Furthermore, as shown in FIG. 5, the non-contact inducing portions 40 according to the present invention may be formed with pleat portions 43 which are formed in a pleat-shape in a longitudinal direction on the supporting portion 20. The pleat portions 43 have a deformation in a lateral direction which occurs easily, and serves to reinforce the strength of the supporting portions 20 by each pleat 25 formed in a vertical direction thereon. 10 Therefore, the sensitivity to deformation is increased as the deformation of the supporting portions 20 is facilitated by the pleat portions 43 of the non-contact inducing portions 40, and simultaneously, abnormal deformation of the air cell AC may be prevented by the reinforced strength of the supporting portions 20. 5 Meanwhile, as shown in FIGS. 1 to 3, the air cell AC according to the present invention may solve problems of contact between the supporting portions 20 occurring in a longitudinal direction of the air cell AC or abnormal deformation by the non-contact inducing portions 40. However, stress may be concentrated on both side portions, and particularly, 10 corner portions connected to the top surface portion 10 and both side surface portions of the supporting portions 20 of the air cell AC when the load of a user is applied thereon, and accordingly, a problem in which the corner portions of the air cell AC become vulnerable to collapsing or recessing, etc. may occur. Therefore, in the present invention, it is preferable to have the air cell AC 15 formed with reinforcing portions 50 so as to reinforce the strength of both corner portions of the upper portion thereof. That is, it is preferable that the reinforcing portions 50 are formed with reinforcing grooves 51 extending from the upper surface of the top surface portion 10 to both side surface portions of the supporting portions 20, and the reinforcing 20 grooves 51 are formed in a plurality on both side surface portions. Therefore, when the load of a user is applied on the air cell AC, particularly, on both side corner potions of the upper portion of the air cell AC, the reinforcing grooves 51 of the reinforcing portions 50 prevent corner portions from collapsing or abnormal recessing by reinforcing the strength of the corner portions. 11 In addition, the reinforcing grooves 51 of the reinforcing portions 50 may improve an operational reliability of the air cell AC by having the air cell AC operate as a normal cushion. In this case, although the reinforcing portions may be formed as a protrusion, 5 it may be rather preferable to be formed in a groove shape because the protrusion may cause a feeling of discomfort when the body of a user contacts thereon. Furthermore, as shown in FIGS. 6 to 8, a stretching cell 60 according to the present invention is formed in a plate shape and fuses to upper portions of the plurality of air cells AC, and the air cells AC fused are integrated into one body by 10 the stretching cell 60. The stretching cell 60 according to the present invention supports the lumbar region of the body of a user, and may induce a deep sleep in addition to relieving fatigue by stretching the lumber region through expanding and contracting during sleeping. 15 In this case, the stretching cell 60, which is formed to expand and/or contract independently in the air cells AC, stretches a certain portion regardless of the operation of the air cells as described above, may be implemented in various operations, and may further improve convenience of use. To this end, the stretching cell 60 includes an injection hole on a lower 20 portion thereof, and a second nozzle 63 is connected to the injection hole, and an air pump is connected to the nozzle 63, therefore, the operation of expanding and contracting of the stretching cell 60 is provided by air injected from the air pump (see FIG. 8). In addition, fusing portions 61 are formed on a lower surface of the 25 stretching cell 60 for fusing the stretching cell 60 to the top surface portions 10 of the 12 air cells AC, and the stretching cell 60 is fused on the top surface portions 10 of the air cells AC by high frequency welding. Furthermore, the stretching cell according to the present invention may secure stability of use by additionally serving to supplement supporting heights of 5 the air cell at a portion in which a flexure change of a body is big such as the lumbar region, and thus reliability of an air mattress may be improved by inducing a deep sleep. The air cell module according to the present invention as described above, as shown in FIGS. 1 and 2, is formed with a plurality of air cells AC disposed in a 10 plurality of rows, and is fixed on the main body of the air mattress by the coupling portion. In this case, it is preferable that the separation distance between each of the rows is maintained at the minimum distance at which each of the air cells AC does not contact each other when each of the air cells AC is deformed. 15 In addition, when the air cells AC disposed on each row are deformed, even though a contact problem between the adjacent air cells AC in each row is increased, the problem described above may be solved in the present invention because the non contact inducing portions 40 accommodate deformation or expansion when the air cells AC are deformed or expanded. 20 Meanwhile, the air cell module AC according to the present invention is formed of TPU (thermoplastic poly urethane) having excellent durability and abrasion resistance, wherein the TPU material is cut first, and a upper structure (including the top surface portion 10 and the supporting portions 20) and a substructure(including the bottom surface portion 30) are formed. 13 In this case, the upper structure is formed by vacuum forming, and the first nozzle 33 is fused on the injection hole of the substructure by fusing. Then, the upper structure and the substructure, more specifically, fusion portions 21 of the supporting portions 20 and the upper surface of the bottom surface 5 portion are fused by high frequency welding, and the fixing holes 35a of the coupling portions 35 included in the both sides portions of the bottom surface portion are formed by punching. Meanwhile, as shown in FIGS. 6 and 7, in the case in which the stretching cell 60 is introduced, the TPU material is cut first, and the stretching cell 60 is 10 formed by fusing, and the stretching cell 60 is fused to the fusing portions 61 of the top surface portions 10 by high frequency welding when the upper structure is formed by vacuum forming. The upper structure fused to the stretching cell 60 and the substructure are also fused by high frequency welding, then the fixing holes 35a are formed on the 15 coupling portions 35 of the bottom surface portion 30 by punching. In addition, when the stretching cell 60 is formed, the injection hole is formed on the lower surface of the stretching cell 60, and a second nozzle is fused to the injection hole by fusing. As described above, the present invention can provide an air cell module for 20 an air mattress in which non-contact inducing portions formed on supporting portions of adjacent air cells prevent contact between the adjacent supporting portions by the non-contact inducing portions having a concave portion formed in a concave shape in an opposite direction or a pleat portion formed in a longitudinal direction on the adjacent supporting portions, and the concave portion or the pleat portion 25 accommodate the expansion of the supporting portions. 14 In addition, the present invention can provide an air cell module for an air mattress in which reinforcing portions formed on a top surface portion and supporting portions of an air cell reinforce the strength of the air cell by reinforcing the resistance against the load of a user. 5 In addition, the present invention can provide an air cell module for an air mattress in which discomfort may be eliminated by preventing a feeling of discomfort when the body of a user contacts thereon, as reinforcing portions are formed in a groove shape. In addition, the present invention can provide an air cell module for an air 10 mattress in which a stretching cell formed on an upper portion of air cells relieves a feeling of fatigue by providing an acupressure effect on, particularly, the lumbar region of the body of a user using expansion and contraction of the stretching cell. In addition, the present invention can provide an air cell module for an air mattress which secures stability of use and improves reliability of an air mattress by 15 a stretching cell supporting air cells and inducing a deep sleep by supplementing the supporting heights thereof in which a flexure change of a body such as the lumbar region is large. It will be apparent to those skilled in the art that various modifications can be made to the above-described exemplary embodiments of the present invention 20 without departing from the spirit or scope of the invention. Thus, it is intended that the present invention covers all such modifications provided they come within the scope of the appended claims and their equivalents. 15