JP4971073B2 - Discharge needle unit and discharge device using the same - Google Patents

Description

  The present invention relates to a discharge needle unit and a discharge device using the discharge needle unit, and is particularly suitable for use in a discharge portion of a static eliminator, an air purifier, or a negative ion generator.

  A large number of devices using various discharge phenomena such as corona discharge and spark discharge have been developed today. Above all, a static eliminator that removes electric charges distributed over a local area in a mechanical / electrical device, an air cleaner that causes corona discharge in the air and collects dust in the air at a predetermined location, and corona discharge. As a typical example, negative ion generators that negatively ionize substances in the atmosphere and optimize the indoor environment are not limited to these, and discharge devices are widely commercialized in various fields.

For example, in a static eliminator provided in a mechanical device, when friction occurs between a drive side and a passive side in the mechanical device, a charge is applied to a local or a wide area in the mechanical device depending on each material. Is charged. This phenomenon is conspicuous when friction occurs between a continuously driven slide-driven film and a resin mechanical part. As an example, there is a packaging device that seals and wraps a powdery material on a film. At this time, the electric charge affects the driving state of the mechanical device, and sometimes the mechanical device may be greatly reduced in function. Therefore, a predetermined electric potential is applied to the static eliminator, and ions having the opposite polarity to the charge charged in the device are generated near the discharge needle arranged in the discharge device, and the charges in the mechanical device and the ions having the opposite polarity are combined. Thus, the electric charge in the mechanical device is canceled.

However, such a static eliminator is generally required to be durable enough to withstand long-term use, and the discharge needle portion provided in the static eliminator drops off due to the vibration phenomenon of the mechanical device and the discharge phenomenon that promotes the static elimination action. Had a problem with it. If the discharge needle part falls off, the function of the static eliminator is not guaranteed, and the packaging device that wraps products such as food and medicines also affects the safety of the product after packaging. Will be a problem. Further, a fixing method in which the discharge needle portion is welded to the electrode portion provided in the static eliminator is conceivable. However, in this fixing method, since the volume of the discharge needle portion is small, thermal deformation is likely to occur, and positioning work becomes difficult. . Furthermore, when manufacturing a discharge needle unit composed of a discharge needle part and an electrode part, it is necessary to add a new welding process, which causes a problem that the production cost increases.

  In order to avoid such a problem, Japanese Utility Model Laid-Open No. 63-145299 (Patent Document 1) forms a discharge needle portion by forming a discharge portion protruding in the outer circumferential direction of an annular conducting member. And the cylindrical electrode part which can be fitted to the inner ring part of the discharge needle part is prepared, and the discharge needle part is fitted to the electrode part. Thereafter, the electrode portion fitted with the discharge needle portion is stored in the housing, and a predetermined opening is provided in the housing so that the discharge portion formed on the discharge needle portion faces the outside of the housing. As a result, the discharge needle portion is securely held inside the housing, and the function of the discharge device is maintained and the safety is ensured without dropping from the electrode portion.

Japanese Utility Model Publication No. 63-145299

However, in the technique of Patent Document 1, since the discharge needle portion has a shape in which the discharge needle and the conductive ring portion are coupled to each other, the structure becomes complicated and there is a concern about an increase in production cost. In addition, since a gap is generated between the annular ring portion formed in the discharge needle portion and the cylindrical electrode portion, there arises a problem that the positioning accuracy of the discharge needle portion is deteriorated. In addition, since the discharge needle portion is housed inside the casing while being inserted through the cylindrical electrode portion, a new configuration is required to fix the discharge needle so that the direction of the discharge needle faces the opening. There also arises a problem that the structure of the apparatus becomes complicated.

  In view of the above problems, the present invention provides a discharge needle unit that can prevent the discharge needle portion from falling off the electrode portion with a simple configuration and that can be produced at low cost, and has safety without sacrificing the original function. It aims at providing the guaranteed discharge device.

In order to solve the above problems, the present invention has the following discharge needle unit configuration. That is, according to the first aspect of the present invention, the barrel shaft portion having the sharp end portion formed on the discharge side and the vertical shaft portion disposed on the positioning side so as to be substantially perpendicular to the barrel shaft portion are integrally formed. The discharge needle portion, the hole portion through which the body shaft portion is inserted and crimped, and the electrode portion in which the positioning portion provided at the position where the vertical shaft portion abuts are electrically connected In the discharge needle unit, the vertical shaft portion is disposed between the hole portion and the positioning portion, and the sharp end portion is disposed in a state of facing the external space of the discharge needle unit. It is characterized by. Further, the discharge needle portion may be formed in an L shape by the trunk shaft portion and the vertical shaft portion. Further, in the electrode part, the hole part and the electrode part may be integrally formed.

Moreover, in the discharge device according to claim 4, in the discharge device that generates discharge according to an externally applied potential, the discharge device includes the discharge needle unit, and supplies the potential to the electrode unit. The electric potential is supplied to the discharge needle through the electrode portion, and discharge is generated by the discharge needle.

  According to the discharge needle unit of the present invention, when the discharge needle portion slides along the central axis, the hole portion is provided on the discharge side while preventing the vertical shaft portion from sliding, and the positioning portion is positioned on the positioning side. Therefore, even if the crimping state between the discharge needle portion and the hole portion is released, the discharge needle portion does not fall off from the electrode portion, and the function maintenance and safety of the apparatus are ensured. In addition, since the positioning is easily set by the vertical shaft portion formed on the discharge needle portion and the positioning portion formed on the electrode portion, manufacturing errors in the crimping process between the discharge needle portion and the electrode portion can be suppressed. Can do. Further, since the vertical shaft portion, the hole portion, and the positioning portion are integrally formed with the discharge needle portion and the electrode portion with a simple configuration, the manufacturing cost can be reduced.

According to the discharge device of the present invention, since the discharge needle unit described above is used, the function maintenance and safety of the discharge device are ensured without the discharge needle portion falling off from the electrode portion. Moreover, since the manufacturing error in the crimping | compression-bonding process of a discharge needle part and an electrode part is suppressed, the performance error between each rod in a discharge device can be reduced. Furthermore, since the manufacturing cost of the discharge unit 1 is reduced, the manufacturing cost of the discharge device is also suppressed accordingly.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a discharge unit according to the present embodiment. First, as shown in FIG. 1A, the discharge needle unit 1 includes a discharge needle portion 10 and an electrode portion 20 that fixes the discharge needle portion 10 at a predetermined position.

The discharge needle portion 10 is integrally formed from a core-shaped member having a substantially constant cross section, and is bent so as to form an L-shape, and one of the core-shaped members is a vertical shaft portion 13. The other is the trunk shaft 11. Further, the barrel shaft portion 11 is processed with a sharp end portion 12 having a sharp projecting shape at the end portion. On the other hand, the electrode portion 20 is formed in a substantially L-shaped plate body having a certain thickness, and further includes a hole portion 22 for inserting the body shaft portion 11 of the discharge needle portion 10 and a vertical shaft portion 13. A positioning portion 23 having a contact surface for contacting a part of the outer peripheral surface is integrally formed by stamping or the like. Further, the electrode portion 20 is provided with a terminal portion 21 for receiving a potential supplied from the outside in order to cause discharge at the sharp end portion 12 of the discharge needle portion 10.

When the discharge needle unit 1 is assembled, first, the sharp end portion 12 formed in the discharge needle portion 10 is inserted in the X direction to the Y direction in the drawing, and the body shaft portion 11 is inserted into the hole portion 22 in a loosely fitted state. Let Thereafter, as shown in FIG. 2B, the discharge needle portion 10 is slid while the vertical shaft portion 13 is brought into contact with the contact surface of the positioning portion 23, and the discharge needle portion 10 is disposed on the electrode portion 20. At this time, the discharge needle part 10 and the electrode part 20 are electrically connected at any part.

FIG. 2 is a partially enlarged view showing a state in which the discharge needle unit 1 is observed from the direction A shown in FIG. In addition, the slide axis in the trunk shaft portion 11 inserted into the hole portion 22 is a central axis 30, and the direction in which the sharp end portion 12 is formed in the discharge needle portion 10 among the central axes is a discharge side 31. A direction in which the shaft portion 13 is formed is defined as a positioning side 32. As described above, in the discharge needle portion 10, a part of the outer peripheral surface of the vertical shaft portion 13 is in contact with the contact surface of the positioning portion 23. At this time, since the vertical shaft portion 13 is L-shaped so as to be substantially perpendicular to the trunk shaft portion 11, the vertical shaft portion 13 is laid out so as to be substantially perpendicular to the central shaft 30. Further, in the case of such an arrangement state, the vertical shaft portion 13 is arranged in the range of Z1 to Z2 between the surface on the positioning side 32 of the hole portion 22 and the contact surface of the positioning portion 23. . That is, when the discharge needle part 10 slides to the discharge side 31, the vertical needle part 13 and the hole part 22 collide with each other when the discharge needle part 10 is slid by a predetermined amount, and the vertical shaft part 13 is on the discharge side from the position Z2. The structure cannot slide to 31. On the other hand, when the discharge needle portion 10 is about to slide to the positioning side 32, the movement of the discharge needle portion 10 is prevented by the collision between the vertical shaft portion 13 and the contact surface of the positioning portion 23, and the vertical shaft portion 13 is positioned. The structure is such that it cannot slide to the positioning side 32 from Z1. As a result, even if the fixation between the discharge needle portion 10 and the electrode portion 20 is released, as long as the layout is maintained, the discharge needle portion 10 moves in the direction of the central axis, so that the electrode The discharge needle part 10 does not fall off from the part 20.

Further, the discharge needle portion 10 has a length in the central axis direction of the trunk shaft portion 11 that is longer than Z1 to Z2 between the surface on the positioning side 32 of the hole 22 and the contact surface of the positioning portion 23. Since it is designed, even when the vertical shaft portion 13 is in contact with the contact surface of the positioning portion 23, the barrel shaft portion 11 is always inserted into the hole portion 22. Therefore, there is no possibility that the discharge needle portion 10 moves in a direction perpendicular to the central axis 30 and the discharge needle portion 10 falls off the electrode portion 20. In the discharge needle portion 10, the length in the central axis direction of the trunk shaft portion 11 is longer than the distance L from the outer edge formed in the discharge direction to the contact surface of the positioning portion 23 among the outer edges of the electrode portion 20. Designed to be Therefore, when the discharge needle portion 10 is laid out on the electrode portion 20, the sharp end portion 12 formed on the discharge needle portion 10 protrudes into the external space on the discharge side outside the electrode portion 20, and the external space It is laid out in a state where it faces.

  Here, when the discharge needle unit 1 is actually used, ions generated in the vicinity of the sharp end 12 are attracted toward an object charged to a polarity opposite to that of the ions. At this time, it is necessary to set the separation distance between the sharp end 12 and the object to a predetermined length so that ions can be efficiently supplied. For this reason, it is preferable that the discharge needle portion 10 is fixed to the electrode portion 20 so that the positional relationship between the object and the sharp end portion 12 does not change due to various factors generated by the discharge operation. FIG. 3 shows a state where the discharge needle portion according to the present embodiment is crimped to the electrode portion. In addition, this figure has modeled the state which observed the discharge needle unit 1 from the B direction of FIG.1 (b) description. As shown in FIG. 3A, the discharge needle portion 10 is fitted into the hole portion 22 of the electrode portion 20 and is loosely fitted in the state shown in FIG. A sufficient clearance is ensured between them. Therefore, it can be seen that the discharge needle portion 10 is in a state in which it can freely slide in the central axis direction. In order to improve this, for example, as shown in FIG. 3 (b), a part of the hole 22 is plastically deformed by press working, and the clearance between the discharge needle 10 and the electrode 20 is eliminated. As a result, a frictional force is generated on the contact surface between the discharge needle portion 10 and the electrode portion 20, and the discharge needle portion 10 is crimped without being able to slide in the central axis direction. In addition, when the hole 22 is pressed, if the deformation is applied at a higher strength, the discharge needle 10 in the range that is inserted into the hole 22 together with the hole 22 is also deformed at the same time. A reaction force is generated between the needle portion 10 and the electrode portion 20, and the discharge needle portion 10 is further pressure-bonded. In this embodiment, the discharge needle portion 10 and the electrode portion 20 are pressure-bonded with the vertical shaft portion 13 of the discharge needle portion 10 in contact with the positioning portion 23. As long as the positional relationship with the portion 10 can be properly maintained, the discharge needle portion 10 and the electrode portion 20 may be pressure-bonded in a state where the vertical shaft portion 13 and the hole portion 22 are in contact with each other. . Further, the discharge needle portion 10 and the electrode portion 20 may be pressure-bonded by laying out the vertical shaft portion 13 at an intermediate position between Z1 and Z2.

According to the present embodiment, when the discharge needle portion 10 slides along the central axis 30, the hole portion 22 is provided on the discharge side 31 in a state where the vertical shaft portion 13 is prevented from sliding, and the positioning side 32 is Since the positioning portion 23 is provided, even if the crimping state of the discharge needle portion 10 and the hole portion 22 is released, the discharge needle portion 10 does not fall off from the electrode portion 20, and the function of the apparatus can be maintained. Safety is guaranteed. Further, since the positioning is easily performed by the vertical shaft portion 13 formed on the discharge needle portion 10 and the positioning portion 23 formed on the electrode portion 20, in the pressure bonding process between the discharge needle portion 10 and the electrode portion 20. Manufacturing errors can be suppressed. Furthermore, since the vertical shaft portion 13, the hole portion 22, and the positioning portion 23 are integrally formed with the discharge needle portion 10 and the electrode portion 10 with a simple configuration, the manufacturing cost can be reduced.

Next, a discharge device according to Example 2 will be described. In addition, since the discharge needle unit 1 described above is used as it is in such a discharge device, the same portions are denoted by the same reference numerals, and description thereof is omitted. Furthermore, the discharge device described in the present embodiment refers to a device using a discharge action including a static eliminator, an air purifier, and a negative ion generator.

FIG. 4 shows the configuration of the discharge device according to the present embodiment. Referring to FIG. 4A, the discharge device 40 includes the above-described discharge needle unit 1, a power transmission cable 41 including a socket connected to the terminal portion 21 of the discharge needle unit 1, and the discharge needle unit 1 and the power transmission cable. 41 and a housing 42 for storing the device 41 in a predetermined position.

The housing 42 is composed of housing parts 43 and 44, and an opening for discharge is provided so that the discharge needle portion 10 of the discharge needle unit 1 faces the external space. In addition, an opening for the power transmission cable 41 is provided to connect the power transmission cable 41 to an external power source.

As shown in FIG. 4B, the discharge needle unit 1 is connected to the power transmission cable 41 when the discharge device 40 is assembled. Thereafter, the discharge needle unit 1 is disposed in the vicinity of the discharge opening formed in the housing part 43, whereby the discharge needle unit 10 is disposed in a state of facing the external space of the discharge device 40. In addition, the power transmission cable 41 is stored in the housing 42 in a state where one end is taken out of the discharge device 40. Thereafter, the power transmission cable 41 is connected to a power source disposed outside the discharge device 40. Therefore, when an external power source is driven, the potential generated by the power source is applied to the discharge cable 41 and applied to the discharge needle unit 10 via the electrode unit 20 constituting the discharge needle unit 1. . Thereby, a corona discharge is generated in the sharp end portion 12 formed in the discharge needle portion 10, and ions generated by the discharge are attracted to an object charged with a polarity opposite to that of the ions.

According to the present embodiment, since the discharge needle unit 1 described in the first embodiment is used, the function maintenance and safety of the discharge device 40 are ensured without the discharge needle section 10 dropping off from the electrode section 20. Is done. Moreover, since the manufacturing error in the crimping | compression-bonding process of the discharge needle part 10 and the electrode part 20 is suppressed, the performance error between each rod in the discharge device 40 can be reduced. Furthermore, since the manufacturing cost of the discharge unit 1 is reduced, the manufacturing cost of the discharge device 40 is also suppressed accordingly.

  Each embodiment described as above is only one embodiment of the present invention, and the meaning of the terminology of the present invention or each constituent element is not limited to that described in the embodiment. Absent. For example, in this embodiment, the discharge needle portion 10 is integrally formed in an L shape from a core-shaped member, but another shape of the discharge needle portion 10 may be formed by using other members. Moreover, although the hole formed in the electrode part 20 has a 22 semi-cylindrical curved surface, it can be changed as appropriate for technical reasons such as a mold in the press apparatus. Furthermore, although the positioning part 23 is made into the state by which the plate body of the substantially rectangular parallelepiped was cut and raised, you may press-work what is called "dough" which did not be restricted to this but the cylindrical shape and spherical shape which protruded. However, the shape of the positioning portion 23 can be easily modified.

The figure which shows the structure of the discharge needle unit which concerns on Example 1. FIG. The figure which shows the state by which the discharge needle part which concerns on Example 1 is arrange | positioned at the electrode part. The figure which shows the method by which the discharge needle part which concerns on Example 1 makes it crimp on an electrode part. The figure which shows the structure of the discharge device which concerns on Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge needle unit 10 Discharge needle part 11 Trunk shaft part 12 Sharp end part 13 Vertical shaft part 20 Electrode part 21 Terminal part 22 Hole part 23 Positioning part 30 Center axis 31 Discharge side 32 Positioning side 40 Discharge device 41 Power transmission cable 42 Case 43 Case part 44 Case part

Claims (4)

A discharge needle portion integrally formed with a barrel shaft portion formed with a sharp end on the discharge side and a vertical shaft portion arranged in a state of being substantially perpendicular to the barrel shaft portion on the positioning side;
A discharge needle unit in which a hole portion through which the barrel shaft portion is inserted and crimped and an electrode portion formed with a positioning portion provided at a position where the vertical shaft portion abuts are electrically connected. And
The vertical shaft portion is disposed between the hole portion and the positioning portion,
The discharge needle unit, wherein the sharp end portion is arranged in a state of facing the external space of the discharge needle unit.   The discharge needle unit according to claim 1, wherein the discharge needle portion has an L-shape formed by the body shaft portion and the vertical shaft portion.   The discharge needle unit according to claim 1 or 2, wherein the hole portion and the electrode portion are integrally formed in the electrode portion. In a discharge device that generates a discharge according to an externally applied potential,
The discharge device includes the discharge needle unit, causes the electric potential to be supplied to the electrode portion, causes the electric potential to be supplied to the discharge needle portion via the electrode portion, and causes discharge to occur in the discharge needle portion. The discharge device according to any one of claims 1 to 3, wherein the discharge device is characterized.

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