Description NEGATIVE ION EMISSION LAMP Technical Field [1] The present invention relates to a lamp for emitting or generating negative ions, more particularly, to a lamp capable of generating negative ion more safely having a negative ion generator built-in by a way of forming a protecting tube, whose side face has a ventilating hole and whose one end has a grill, in the center of its external case to be protruded and having a electron emitting high voltage unit located in the protecting tube, wherein a wind of ion produced as the electron emitting high voltage unit generates a negative ion lets the air ventilated through the ventilating hole and expelled through the grill so that the negative ion may be spread farther and smoother by an operation of the wind of ion and a high voltage applied to the electron emitting unit may be blocked from leaking by the protecting tube. Background Art [2] A negative ion has positive functions as a kind of an air cleaner to disinfect, to dis¬ integrate and eliminate of bacterial smelling-molecular such as mildew, to collect dust, to eliminate smoke, etc. Nevertheless, a general air cleaner bears problems in that it is large in volume, it needs a large area to install and it needs to be taken care of con¬ tinuously. [3] As a device where a technique for generating negative ions is applied to a lamp in order to solve such problems, there is an illuminating lamp with a cartridge-type negative ion generator in Korean registered patent No. 10-0384465. Disclosure of Invention Technical Problem [4] The structure of the illuminating lamp 1 will be described as follows referring to FlG. 1 and 2. The illuminating lamp 1 has a body 2 where an illuminating tube 3 formed in its lower portion integrally and a screw-typed fastening member in its upper portion. A cylinder 4 is formed in the body 2 crosswise and a current applying electrodes is provided on the inside wall of the cylinder 4. The cylinder 4 is provided to contain a cartridge-typed negative ion generator 5. The negative ion generator 5 has an internal discharging pin 6 placed centrally, an electrification tube 7 installed in the form of surrounding the discharging pin 6 and a current receiving electrodes 8 cor¬ responding to the current applying electrodes of the cylinder 4. Grills 9 are formed in front and in rear of the negative ion generator 5 so as to ventilate a negative ion and air. [5] The negative ion generator can be inserted into or separated from the cylinder 4 easily. Pushing one end of the cylinder 4 with finger, then part of the other end ejected, so that the negative ion generator 5 can be detached. [6] The illuminating lamp 1 is connected to use to a lighting instrument while the negative ion generator 5 is assembled thereto. [7] In general, the lighting instrument for emitting negative ions is filled in the ceiling and its lampshade 10 is made with metal of a conducting material. [8] Since the cartridge-typed negative ion generator 5 discharges negative ions by a way of a corona discharge, dust is accumulated inside as a corona discharge continues for a long time. The cartridge-typed negative ion generator 5 is useful in that attaching or detaching is easy when cleaning and replacement is easy when disordered. Nev¬ ertheless, it has problem in that a large amount of ozone is produced in the process of corona discharge and an amount of negative ions generated is so small that effect of negative ions is beyond expectation. [9] Further, the negative ions emitted become disappear due to electrification at the lampshade 10, since the negative ion generator 5 emits negative ions crosswise that is, toward the lampshade 10. [10] There is another problem in that the discharge pin becomes impossible to discharge due to oxidization by activated radicals such as O , OH etc, which are produced as the discharge pin discharges. [11] In addition, in a method to generate negative ions by an electron emission, spark happens to be generated on the negative ion generating source and a glass surface of the lamp due to an electrification phenomenon of charged dust when electron emitting unit is exposed outside. This phenomenon can deteriorate life spans of the lamp and the negative ion generator and produce a safety problem to give user a serious electric damage when user contacts the electron-emitting unit operating with a high voltage with fingers or a conductive object. Technical Solution [12] An object of the present invention is to provide a negative ion-generating lamp to solve the above-mentioned problems. [ 13] Another object of the present invention is to provide a negative ion-generating lamp that emits the negative ions generated toward valid space where human beings exist so that the effect of the negative ion may be maximized. [14] Still another object of the present invention is to provide a negative ion generating lamp blocks a high voltage applied to an electron emitting unit is blocked by a non- conductive protecting tube so that a safety accident such as electric damage etc, may be prevented. [15] Still another object of the present invention is to provide an negative ion generating lamp that has a protecting tube, whose side face has a ventilating hole and whose one end has a grill, whereby a wind of ion produced as the electron emitting high voltage unit generates a negative ion lets air ventilated through the ventilating hole and expelled through the grill, so that a stream of intake and outtake of air may be performed smoothly and the negative ion may be spread over the room, thereby effect of the negative ion can be maximized. [16] Still another object of the present invention is to provide a negative ion generating lamp that circulates air from outside continuously through the ventilating hole of the protecting tube so that heat generated as electron emitting high voltage unit generates the negative ion may be cooled, thereby its life span and lamp life span can be extended. Advantageous Effects [17] The negative ion generating lamp according to the present invention is capable to prevent a reduction of the lamp performance due to electrification between the negative ion generating means and a grass surface of the lamp and to eliminate a dan- gerousness of an electric shock due to a contact between user's fingers and the negative ion generating means 24. [18] The negative ion-generating lamp according to the present invention is capable to emit lots of negative ions smoothly so that user may facilitate effect of negative ions actually and static electric charge accumulated inside of the body of the negative ion- generating lamp may be reduced remarkably, accordingly. [19] In other hand, the negative ion generating lamp according to the present invention is capable to circulate air from outside continuously by a protecting tube 30 and 31 of the electron emitting high voltage unit 24a, which intakes and outtakes air in peripheral circumstance, so that heat increase of the electron emitting high voltage unit may be suppressed, thereby disorder of the negative ion generating means 24 including a PCB 25 can be protected. Brief Description of the Drawings [20] FlG. 1 shows a perspective view of a conventional negative ion-generating lamp; [21] FlG. 2 shows an exemplary view of an installing state of the negative ion- generating lamp shown in FlG. 1 ; [22] FlG. 3 through 5 shows prospective and disassembled views of the negative ion generating lamp according to the present invention, respectively; [23] FlG. 6 shows a sectional view of an assembling state of the negative ion-generating lamp according to the present invention; [24] FlG. 7 and 8 show another embodiment of the external case important in the negative ion-generating lamp according to the present invention. Mode for the Invention [25] Above objects and aspects of the present invention will be understood by the de¬ scription below, in reference with accompanied drawings in more detail. [26] FlG. 3 through 5 show a prospective and disassembled views of the negative ion generating lamp according to the present invention, respectively, FlG. 6 shows a sectional view of an assembling state of the negative ion generating lamp according to the present invention, and FlG. 7 and 8 show another embodiment of the external case important in the negative ion generating lamp according to the present invention. [27] Referring to FlG. 2 through 5, in the negative ion generating lamp according to an embodiment of the present invention, the negative ion generating means 24 and a PCB 25 which generates and controls a high voltage are built-in in a body 21, the body 21 is covered with an external case 22, a illuminating bulb 23 is provided outside of the external case 22 integrally, a protecting tube 30 is formed in the central place of the external case 22 to be protruded, and the electron emitting high voltage unit 24a is located in the protecting tube 31. [28] The body 21 has a screw-typed fastening member in its upper portion to adapt to a lighting instrument as the same as a general lamp. [29] In the external case 22, an illuminating bulb installing hole 23a to install the il¬ luminating bulb 23 is formed outside integrally and the protecting tube 31 is formed in the central place to be protruded. A plurality of ventilating holes 32 are formed on the side faces of the protecting tube 31, and a grill 33 is formed on one end of the protecting tube 31. [30] The negative ion generating means 24 has an internal electron emitting high voltage unit 24a. To construct the electron emitting high voltage unit 24a, either a corona discharge method to discharge in air or a carbon-brush method to generate negative ions by applying a high voltage with a carbon for example a charcoal can be adapted. [31] The corona discharge method will be explained in detail as follows. [32] By the corona discharge, negative ions are generated by applying a high voltage to an electron emitting high voltage unit 24a. Here, the electron emitting high voltage unit 24a includes an alloy formed by mixing 8 kinds metal including platinum, a stainless, a copper, silver, zinc, a nickel, manganese, and tungsten, a conductive cloth containing free electrons, and a semi-conductive rubber. Especially, the shape of the electron emitting high voltage unit 24a is twisted like a lope and the surface of the electron emitting high voltage unit 24a resembles tens of thousand of lighting rods erected, The electron emitting high voltage unit 24a converts an electric energy into a heat energy so that the heat energy is corona discharged into air through a constant resistance. [33] According to the present invention, a spark discharge does not occur during a corona discharge and thereby ozone does not produce. [34] Meanwhile, by the carbon-brush method, negative ions are generated by applying a current with a high voltage to an activated charcoal. If such a current with the high voltage is applied through a negative high voltage wire to the activated charcoal, electrons, activated by energy (high voltage), in the uttermost outer shell of atoms of the activated charcoal are emitted. Emitted electrons combine with various kinds of components in air to generate negative ions without ozone. [35] The PCB 25 is an electric circuit to apply a high voltage to the negative ion generating means 24 and has a penetrating hole 26 in its center. [36] The negative ion generating means 24 is installed on the PCB 25 as shown in FIG. 5 and the electron emitting high voltage unit 24a is located in the protecting tube 31 of the external case 22 through the penetrating hole 26. [37] FIG. 7 and 8 show another embodiment of the external case 22a embodied in different form, where a body of the external case 22a and the protecting tube 30 can be disassembled. An illustrating bulb installing hole 23a by which an illuminating bulb 23 can be installed is formed outside of the external case 22a, an installing hole 35 is formed in the central place of the external case 22a. A protecting tube 30 has a ventilating hole 32 leading its other end on its side faces. A body of the protecting tube 30 between one ventilating hole 32 and the other ventilating hole 32 is elastic like an elastic piece. Further an installing groove 34 is formed in the bottom of the protecting tube 30 and a grill 33 is formed on external end of the protecting tube 30. [38] The protecting tube 30 is to be inserted into the installing hole 35 of the external case 22a. The installing hole 34 of the protecting tube 30 is inserted into the inside surface 36 of the installing hole 35 and an installing state is maintained by elastic force of the protecting tube 30 by itself. [39] Accordingly, the negative ion-generating lamp 20 is formed by assembling the protecting tube 30 and the external case 22a; installing the negative ion generating means 24 and the PCB 25 into the body 21 ; and covering the body 21 with the external case 22a. [40] The operation of the negative ion-generating lamp 20 according to the present invention will be described in detail referring the accompanied drawings. [41] The negative ion-generating lamp 20 of the first embodiment according to the present invention functions, shown in FIG. 3 through 5, operates as follows. [42] When the power is supplied by operating a power switch after installing the negative ion generating lamp 20 to a general lighting instrument, the PCB 25 transforms the voltage to a predetermined voltage and applies the transformed voltage to the negative ion generating means 24 so that the electron emitting high voltage unit 24a where being applied with a high voltage emits electrons. [43] Heat is generated in the process of emission of the electrons, and thereby a wind of ions is produced. Upon generating of the wind of ions, outer air is flowed in through the ventilating hole 32 of the external case so that the heat is cooled while electrons generated are emitted through the grill 33 outside. [44] Accordingly, air can be circulated naturally to cool the heat of the electron emitting high voltage unit 24a continuously. [45] Meanwhile, the negative ion-generating lamp 20 of the second embodiment according to the present invention, shown in FlG. 7 and 8, operates as follows. [46] The negative ion-generating lamp 20 of the second embodiment according to the present invention is configured to assemble or disassemble the protecting tube 30 into or from the installing hole 35 of the external case 22a. [47] The ventilating hole 32 has outer air flowed in like the protecting tube 31 of the external case 22 and the electron emitting high voltage unit 24a generates electrons in the protecting tube 30. The wind of ion produces a flow of air to receive outer air through the ventilating hole 32 and emits received air outside through the grill 33 with electrons. [48] In the other hand, dust electrified with a negative charge when a negative high voltage is generated are partly collected on the negative high voltage-generating unit, but mostly collected on the grass surface of the lamp. [49] There are a few possibilities that a spark phenomenon between the high voltage unit for emitting negative ions and grass surface of the lamp is generated by a kind of current passing phenomenon due to dust accumulated thereto if a file of large dust is accumulated continuously. [50] However, in the present invention, because that the protecting tube 30 and 31 whose side face has a ventilating hole 32 to flow air smoothly and whose end has a grill 33 to emit negative ions is formed in the center of the external case 22 and 22a, electrons can be emitted smoothly without exposing the electron emitting high voltage unit 24a outside. [51] Emitted electrons produce negatively ionized oxygen O2- by having negative ions in peripheral space absorbed to oxygen molecular O . When negatively ionized oxygen molecular O are generated, a clustered negative ions O -(H O) n) are generated as water molecular is absorbed to the negatively ionized oxygen molecular O . [52] The wind of ion is generated as lots of clustered negative ions are generated. And a flow of air also generated. The smoother the flow of air is generated, the more the negative ions are generated. [53] Based on this principal, the negative ion generating lamp 20 according to the present invention has air, necessary in generating clustered negative ions, flowed in much smoother by forming a ventilating hole 32 on the side faces and the grill 33 on the end of the protecting tube 30 and 31 respectively. [54] Because negatively ionized ions can be emitted smoothly, a phenomenon by which a static charge is accumulated inside of the lamp case can be reduced remarkably and heat in the lamp can be emitted as well. [55] Thus reduction of the life span of the negative ion generator due to the heat increase and stability of the lame are improved so that improvement of life span of the lamp and enjoyment of effect by negative ions can be achieved. [56] Although a few examples of the present invention were explained through, it is obvious to the skilled person in the art that various modification and changes may be done and thus those modification and changes must be included within the scope of the claims accompanied. [57] [58] [59]