JP2011029126A - Neutralization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a neutralization apparatus in which a discharge unit with a discharge needle to make maintenance of the discharge needle easy is detachable from a housing having a fan, capable of detecting whether the discharge unit is attached, while miniaturizing the apparatus. <P>SOLUTION: A discharge needle 41 and a counter electrode 42 are held in an insulating unit case 43, to constitute a discharge unit 44 together with the unit case 43. A unit attaching part which allows the discharge unit 44 to be detachable is formed at a housing 13. At the housing 13 (unit attaching part), a first terminal 34a and a second terminal 34b are provided so as to be electrically connected with a contact piece 42a provided to the discharge unit 44 when the discharge unit 44 is attached. The housing 13 is provided with a unit detection part which can detect whether the first terminal 34a and the second terminal 34b are electrically connected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a static eliminator for removing static electricity such as electronic components.

  Conventionally, in order to prevent dust from adhering to an electronic component or the like, a static eliminator for removing static electricity is fixed to a production line or a work table for the electronic component or the like. As such a static eliminator, there is one in which a unit is constituted by a discharge electrode, a high-voltage power source (high voltage generation circuit) and a support that supports them, and the unit can be attached to and detached from a housing having a fan. (For example, refer to Patent Document 1). In such a static eliminator, since the unit including the discharge electrode can be removed from the housing, maintenance such as cleaning and replacement of the discharge electrode is facilitated.

JP 2004-253192 A

  By the way, in the static eliminator as described above, in order to detect whether or not the unit is mounted, it is established as a switch such as a push button type switch that is turned on / off by a mechanical external force only on the housing side. A switch member such as a commercially available product is provided. However, such a switch member is an obstacle to downsizing and causes an increase in the size of the static eliminator.

  The present invention has been made to solve the above-described problems, and its purpose is to allow a discharge unit having a discharge needle to be attached to and detached from a housing having a fan in order to facilitate maintenance of the discharge needle. And it is providing the static elimination apparatus which can detect whether it is in the state with which the discharge unit was mounted | worn, reducing in size.

  In order to solve the above-mentioned problem, in the invention according to claim 1, a housing having an air outlet, a fan accommodated and held in the housing and for blowing air from the air outlet, and an electric discharge provided in the air outlet A needle and a counter electrode provided at the outlet so as to be separated from the discharge needle, and applying a high voltage to the discharge needle to generate a corona discharge, thereby air around the tip of the discharge needle A static eliminator that ionizes and blows out the ionized air with the fan, wherein the discharge needle and the counter electrode are held in an insulating unit case to form a discharge unit together with the unit case, and the housing A unit mounting portion that allows the discharge unit to be attached and detached is formed, and the discharge unit is mounted on the unit mounting portion by mounting the discharge unit. A first terminal and a second terminal which are electrically connected by a conductive member provided on the housing, and the housing is electrically connected to the first terminal and the second terminal. The gist of the invention is that unit detection means is provided that can detect whether or not it is connected and output a detection signal.

  According to the same configuration, the discharge needle and the counter electrode are held in the insulating unit case to constitute the discharge unit together with the unit case, and the housing is provided with a unit mounting portion that allows the discharge unit to be attached and detached. Maintenance of the discharge needle such as cleaning and replacement of the discharge needle is facilitated (by removing the discharge unit from the housing).

  In addition, the unit mounting portion is provided with a first terminal and a second terminal that are electrically connected by a conductive member provided in the discharge unit when the discharge unit is mounted. Unit detection means capable of detecting whether or not the first terminal and the second terminal are electrically connected and outputting a detection signal is provided. Therefore, it is possible to detect whether or not the discharge unit is mounted while enabling downsizing. That is, when a switch member such as a push button switch that is turned on and off by a mechanical external force alone is provided on the housing side as in the prior art, the switch member is small. However, in the present invention, the first terminal and the second terminal are provided on the housing side, and the conductive member is provided on the discharge unit side. It is possible to detect whether or not the discharge unit is mounted while reducing the size without using the switch member.

  According to a second aspect of the present invention, in the static eliminator according to the first aspect, one of the first terminal and the second terminal is connected to a ground, and the conductive member is connected to the counter electrode. The gist is that the other one of the first terminal and the second terminal is connected to the ground while being integrally formed and the discharge unit is mounted on the unit mounting portion.

  According to this configuration, one of the first terminal and the second terminal is connected to the ground, and the conductive member is integrally formed with the counter electrode, and the discharge unit is mounted on the unit mounting portion. Since the other of the first terminal and the second terminal is also connected to the ground, the number of parts can be reduced. That is, since the conductive member is integrally formed on the counter electrode originally provided to form a dual-purpose component, the conductive member does not increase the number of components. In addition, since one of the first terminal and the second terminal electrically connected to the counter electrode is connected to the ground, the terminal and the wiring are also used. In other words, if the counter electrode is to be connected to the ground by another system, it is necessary to separately provide a terminal and wiring dedicated to the counter electrode, but this can be avoided, and thus the number of parts can be reduced and further miniaturization can be achieved. Can be achieved.

  According to a third aspect of the present invention, in the static eliminator according to the first or second aspect, the first terminal and the second terminal are not electrically connected by the unit detection means. The gist of the present invention is to provide a notification means for notifying the outside that the discharge unit is not mounted based on the detection signal.

  According to this configuration, when it is determined by the unit detection means that the first terminal and the second terminal are not electrically connected, the notification means based on the detection signal. Since the outside is informed that the discharge unit is not mounted, the operator can easily recognize the state.

  According to a fourth aspect of the present invention, in the static eliminator according to any one of the first to third aspects, the discharge needle is electrically connected to the discharge needle while being housed and held in the housing and the discharge unit is mounted. A high voltage generation circuit for generating a high voltage connected to the first detection terminal and the unit detection means determined that the first terminal and the second terminal are not electrically connected to each other. In this case, a gist is provided with prohibiting means for prohibiting application of a high voltage from the high voltage generation circuit to the discharge needle based on the detection signal.

  According to this configuration, when it is determined by the unit detection means that the first terminal and the second terminal are not electrically connected, the prohibition means based on the detection signal. Since application of a high voltage from the high voltage generation circuit to the discharge needle is prohibited, an unexpected erroneous discharge in the state where the discharge needle is not connected, an electric shock caused by the accident, and the like are prevented.

  According to a fifth aspect of the present invention, in the static eliminator according to the fourth aspect, the prohibiting unit is configured such that the first terminal and the second terminal are not electrically connected by the unit detecting unit. The gist is to further prohibit driving of the fan based on the detection signal when it is determined to be in a state.

  According to this configuration, when it is determined by the unit detection means that the first terminal and the second terminal are not electrically connected, the prohibition means based on the detection signal. Further, since driving of the fan is prohibited, it is possible to prevent the fan from being driven in a state where the discharge unit is not mounted and the air outlet is largely opened, and wasteful power consumption can be suppressed.

  According to the present invention, the discharge unit including the discharge needle can be attached to and detached from the housing including the fan to facilitate maintenance of the discharge needle, and the discharge unit is mounted while reducing the size. It is possible to provide a static eliminator that can detect whether or not a state is present.

The perspective view of the static elimination apparatus in this embodiment. The top view of the static elimination apparatus except the upper side case in this Embodiment. The front view of the static elimination apparatus in this embodiment. The exploded front view of the static elimination apparatus in this embodiment. The disassembled perspective view of the static elimination apparatus in this embodiment. The disassembled perspective view of the static elimination apparatus in this embodiment. The circuit diagram for demonstrating the unit detection part in this embodiment. The disassembled perspective view of the static elimination apparatus in another example. The front view of the static elimination apparatus in another example. The exploded front view of the static elimination apparatus in another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the static eliminator of this embodiment includes a housing 13 including a lower case 11 and an upper case 12 (see FIG. 1), and a fan accommodated and held in the housing 13. And a sirocco fan 14 (see FIG. 2).

  The housing 13 composed of the lower case 11 and the upper case 12 is formed in a flat box shape whose upper surface and lower surface are substantially square and whose side surfaces are substantially rectangular. A circular suction port 13a is formed at the center of the upper surface (upper case 12). As shown in FIG. 5, an air outlet 13 b that opens in a direction orthogonal to the suction port 13 a is formed on one side surface (the front surface of the static eliminator). In addition, the blower outlet 13b is formed as one opening by combining notches formed respectively on one side surface of the lower case 11 and one side surface of the upper case 12. Further, the air outlet 13b is formed on one side surface (the lower side surface in FIG. 2) of the housing 13 closer to the other side surface (the left side surface in FIG. 2). A dustproof filter 15 for preventing the suction of dust into the housing 13 is fixed to the suction port 13a.

  The sirocco fan 14 is a unit in which a fan case 14a, a fan member 14b accommodated in the fan case 14a, and a motor (not shown) for rotationally driving the fan member 14b are unitized. The fan case 14a is formed in a substantially disk hollow shape having a circular opening 14c formed on the upper surface on the axial center of the fan member 14b, and is tangentially connected to a part of the outer periphery (in communication with the inside). It has the blowing cylinder part 14d extended to one side.

  The sirocco fan 14 is inserted into the housing 13 by a bolt 16 (see FIG. 2) or the like so that the circular opening 14c corresponds to the suction port 13a and the blowout cylinder 14d corresponds to the blowout port 13b. Contained and held. When driven, the sirocco fan 14 blows air in a direction (side) perpendicular to the direction sucked through the air outlet 13b while sucking one (upper) air through the suction port 13a. To work.

  As shown in FIG. 2, the static eliminator includes a piezoelectric transformer 21 that is housed and held in the housing 13 and generates a high voltage, and a control circuit that is housed and held in the housing 13 and controls the driving of the piezoelectric transformer 21. And a control circuit board 22 including a section. In this embodiment, the piezoelectric transformer 21 and the control circuit board 22 (part thereof) constitute a high voltage generation circuit.

  Specifically, on the one side surface (lower side surface in FIG. 2) of the housing 13, the other side surface (left side surface in FIG. 2) adjacent to the air outlet 13 b is open on the side of the air outlet 13 b. A bulge accommodating portion 13c that bulges so as to extend the other side surface (the left side surface in FIG. 2) in the direction (downward direction in FIG. 2) and the inside of the housing 13 is formed. . Further, as shown in FIG. 5, a connecting slit 13d that communicates the inside and the outside of the housing 13 is formed on the surface that extends perpendicularly from the one side surface (the lower side surface in FIG. 2) of the bulging housing portion 13c. Has been.

On the other hand, the piezoelectric transformer 21 is formed in a long and substantially rectangular parallelepiped shape and mounted on the transformer substrate 23.
The piezoelectric transformer 21 together with the transformer substrate 23 is one part of the housing 13 (sirocco) so that the end 21a on the high voltage side is housed in the bulging housing section 13c. It is arranged around the sirocco fan 14 along one other side as viewed from the axial direction (upward) of the fan 14 and along the other side surface (the left side surface in FIG. 2). Further, as shown in FIGS. 3 and 4, the piezoelectric transformer 21 of the present embodiment is disposed at the center in the vertical direction of the housing 13 (in the axial direction of the sirocco fan 14). Further, the end 21b on the low voltage side of the piezoelectric transformer 21 is located near the opposite side surface (upper side surface in FIG. 2) facing the one side surface (lower side surface in FIG. 2) inside the housing 13. It is arranged to extend to.

  In the transformer substrate 23 of the present embodiment, a spring terminal 23a connected to the high voltage side of the piezoelectric transformer 21 is fixed at a position viewed from the connection slit 13d. The spring terminal 23a is flexible in the penetration direction (left and right direction in FIG. 2) of the connection slit 13d, and in the vertical direction of the housing 13 (axial direction of the sirocco fan 14) as shown in FIG. A pair is provided so as to sandwich the piezoelectric transformer 21 therebetween. 2 shows a state in which the spring terminal 23a is bent by an external force (toward the left in the drawing) from the connection slit 13d side. The width of the connection slit 13d is set so that it is difficult for an operator's finger or the like to enter from the outside until the operator's finger reaches the spring terminal 23a.

  In addition to the elements for the control circuit unit for controlling the drive of the piezoelectric transformer 21, the control circuit board 22 includes, for example, a connector 25 that can be fitted with an external connector 24 from an external power source, Various elements such as a light emitting diode 26, a light emitting diode 27 as an error display notification means, a power switch 28, and an element for a unit detection unit 29 (see FIG. 7) as a unit detection means described later are mounted. It becomes.

  The control circuit board 22 extends along one side of the housing 13 (one side viewed from the axial direction (upward) of the sirocco fan 14 and the opposite side surface (upper side surface in FIG. 2)). The sirocco fan 14 is disposed around. The control circuit board 22 is electrically connected via the pin header 31 bent to the piezoelectric transformer 21 and the transformer substrate 23. The light-emitting diode 26 for power display and the light-emitting diode 27 for error display are accommodated outside the housing 13 (upper case 12) as shown in FIGS. It is supposed to be exposed.

  Further, as shown in FIG. 2, the static eliminator includes a ground substrate 32 fixed to the one side surface (lower side surface in FIG. 2) in which the air outlet 13b is formed in the housing 13, and the ground. And a detection ground conducting wire 33 that electrically connects the circuit board 32 and the control circuit board 22. The detection ground conductor 33 is one side of the housing 13 (one side viewed from the axial direction (upward) of the sirocco fan 14) and the side opposite to the side where the piezoelectric transformer 21 is disposed (see FIG. 2 is disposed around the sirocco fan 14 along the right side surface)). In addition, a pair of detection ground conductors 33 according to the present embodiment are provided, and the ground substrate 32 is provided with a first terminal 34 a and a second terminal 34 b respectively connected to the detection ground conductor 33. As shown in FIG. 6, the first terminal 34 a and the second terminal 34 b protrude to the outside from the ground window 13 e formed on the one side surface (the lower side surface in FIG. 2) of the housing 13. At the same time, it is provided with flexibility along the protruding direction.

  1 to 3, the static eliminator includes a discharge needle 41, a counter electrode (ground electrode) 42 provided so as to be separated from the discharge needle 41, and the discharge needle 41 and the counter electrode 42. A discharge unit 44 is provided that includes a unit case 43 made of an insulating resin material that has a through hole 43a that is held and communicated with the air outlet 13b.

  The discharge unit 44 is a direction orthogonal to the direction in which air is blown out to the housing 13 (that is, the through direction of the air outlet 13b), and the through direction of the connecting slit 13d (the left-right direction in FIGS. 2 to 4). ) Can be attached and detached (attached and removed) along.

The discharge unit 44 of the present embodiment is detachably attached to the housing 13 when the unit case 43 is mechanically engaged with the housing 13 and is attached to the housing 13.
Specifically, on the one side surface of the housing 13 (the side surface on which the air outlet 13b is formed), the upper side and the lower side of the air outlet 13b are continuous with the bulging accommodating portion 13c as shown in FIG. In addition, a housing upper wall 13f and a housing lower wall 13g projecting in the bulging direction are formed. Grasping claws 13h and 13i as guides slightly projecting in opposite directions are formed at the respective leading ends of the housing upper wall 13f and the housing lower wall 13g in the projecting direction.

  Further, on the surfaces of the housing upper wall 13f and the housing lower wall 13g facing each other on the side away from the bulging housing portion 13c, as shown in FIGS. 3 to 6, the upper wall is recessed in opposite directions. An engaging recess 13j and a lower wall engaging recess 13k are formed. As shown in FIG. 4, the upper wall engaging recess 13 j is recessed in a rectangular shape when viewed from the through direction of the air outlet 13 b, and the lower wall engaging recess 13 k is viewed from the through direction of the air outlet 13 b, The bottom is recessed in a triangular shape with a narrower width. In the present embodiment, these (the one side surface of the housing 13 (the side surface on which the air outlet 13b is formed), the housing upper wall 13f, the housing lower wall 13g, the gripping claws 13h and 13i, and the upper wall engaging recess 13j. And the lower wall engaging recess 13k, etc.) constitute a unit mounting portion.

  On the other hand, the unit case 43 includes a plate-like upper wall portion 43b and a lower wall portion 43c that extend in parallel vertically to form the through hole 43a that communicates with the air outlet 13b, and a first of the upper wall portion 43b. A needle-side connecting portion 43d that holds the discharge needle 41 by connecting the end portion (left end portion in FIGS. 3 and 4) and the first end portion of the lower wall portion 43c, and the second end portion of the upper wall portion 43b. (A right end portion in FIGS. 3 and 4) and a second end portion of the lower wall portion 43 c are connected to each other and a ground side connecting portion 43 e that holds the counter electrode 42 is provided.

  As shown in FIG. 5, the upper wall portion 43b and the lower wall portion 43c are recessed at the corners corresponding to the grip claws 13h and 13i so as to be gripped by the grip claws 13h and 13i. Holding recesses 43f and 43g are formed. That is, the unit case 43 is movable in a direction perpendicular to the direction of blowing out the air by moving the holding recesses 43f and 43g with the holding claws 13h and 13i, and moves in the direction of blowing out the air. Impossible.

  In addition, the upper wall 43b and the lower wall 43c are formed with a U-shaped slit that is open on the side of the needle side connecting portion 43d, so that an upper wall piece 43h having flexibility on the inner side of the U-shaped. And the lower wall piece 43i is formed. An upper wall engaging convex portion 43j that fits into the upper wall engaging concave portion 13j is formed at a position corresponding to the upper wall engaging concave portion 13j in the upper wall piece 43h, and the lower wall engaging portion 43i is formed in the lower wall piece 43i. A lower wall engaging convex portion 43k that fits into the lower wall engaging concave portion 13k is formed at a position corresponding to the combined concave portion 13k. As shown in FIG. 4, the upper wall engaging convex portion 43j is projected in a right triangle shape having a retaining edge when viewed from the through direction of the through hole 43a, and the lower wall engaging convex portion 43k is penetrated. When viewed from the penetration direction of the hole 43a, the top portion is projected in a triangular shape having a narrower width. In addition, on the upper side (upper wall portion 43b side) of the ground side connection portion 43e of the present embodiment, a bulge grip portion 43l bulging in a direction away from the needle side connection portion 43d is formed. At the tip of the upper wall piece 43h extending to the side of the part 43l, the engagement as a disengaging operation part for bending the upper wall piece 43h (and the upper wall engaging convex part 43j) downward by pressing downward. A mating release convex portion 43m is formed. That is, the unit case 43 is connected to the housing 13 by an upper wall piece 43h and a lower wall piece 43i formed with an upper wall engaging convex portion 43j, a lower wall engaging convex portion 43k, and an engagement releasing convex portion 43m. A so-called snap-fit structure that allows the attachment and detachment of the lens is configured. And by these structures, the discharge unit 44 (unit case 43) is a direction orthogonal to the direction (that is, the penetrating direction of the air outlet 13b) that blows air to the housing 13 (the unit mounting portion), It can be attached / detached (attached / detached) along the penetration direction of the connecting slit 13d (left-right direction in FIGS. 2 to 4).

  In the present embodiment, the unit case 43 is in the range H (see FIG. 3) in which the unit case 43 is mechanically engaged with the housing 13 and the gripping recesses 43f and 43g are gripping claws 13h. , 13i is held in the range H (that is, the range H of the gripping claws 13h, 13i) when the discharge unit 44 is disengaged from the housing 13 when viewed from the direction orthogonal to the mounting direction of the discharge unit 44. When the discharge unit 44 is moved to the disengagement position (see FIG. 4) in the removal direction (slide), the discharge unit 44 is the end of the housing 13 (the end in the dismount direction, and the right end in FIG. 4). Part).

  The discharge needle 41 is provided along a direction (the left-right direction in FIGS. 2 to 4) perpendicular to the direction in which the longitudinal direction of the discharge needle 41 blows out the air (that is, the through-direction of the air outlet 13b and the through-hole 43a). In addition, the sharp tip side is disposed in the through-hole 43a, and the base end side is fixed to the needle side connecting portion 43d via the fixing bush 45 so that the base end side protrudes to the outside. Further, the discharge needle 41 is disposed at a substantially central position in the intermediate portion of the through hole 43a in the penetrating direction (air blowing direction).

  Further, as shown in FIG. 3, the discharge needle 41 of the present embodiment corresponds to the connecting slit 13d (see FIG. 5) and the pair of spring terminals 23a, and the housing 13 is moved in the vertical direction (sirocco fan 14). A pair of piezoelectric transformers 21 are provided so as to sandwich the piezoelectric transformer 21 along the axial direction of That is, the discharge needle 41 of the present embodiment is provided so that the discharge unit 44 is attached to the housing 13 so that the spring terminal 23a is bent and brought into pressure contact with and electrically connected to the spring terminal 23a. Yes.

  The counter electrode 42 is fixed to the ground side connecting portion 43e so as to be provided so as to face the tip of the discharge needle 41 in the longitudinal direction of the discharge needle 41. Further, the counter electrode 42 of the present embodiment is a side facing the one side surface (lower side surface in FIG. 2) of the housing 13 in the bulging grip portion 43l of the ground side connection portion 43e. It has a contact piece 42a as a conductive member that bends and extends to a position corresponding to the terminal 34a and the second terminal 34b. That is, the contact piece 42a of the counter electrode 42 of the present embodiment is in electrical contact with the first terminal 34a and the second terminal 34b when the discharge unit 44 is mounted on the housing 13. Is provided. Further, the contact piece 42 a serves to electrically connect the first terminal 34 a and the second terminal 34 b in a state where the discharge unit 44 is mounted on the housing 13, and the unit detection unit 29 ( It is possible to detect whether or not the first terminal 34a and the second terminal 34b in FIG. 7) are electrically connected (that is, the discharge unit 44 is mounted). Further, the counter electrode 42 of the present embodiment is configured such that the fixed piece 42b (see FIG. 1) that is further bent and extended from the tip of the contact piece 42a is screwed, so that the ground side connecting portion 43e (the bulging grip portion 43l) It is fixed to.

Here, the configuration and operation of the unit detector 29 of the present embodiment will be described in detail with reference to FIG.
As shown in FIG. 7, the unit detector 29 includes a P-channel MOS transistor (hereinafter simply referred to as a transistor) Tr, resistors R1 and R2, the power switch 28, and the like. The source of the transistor Tr is connected to a power source (external power source, for example, 24v), and the drain of the transistor Tr is connected to a detection control unit 35 including prohibiting means. The gate of the transistor Tr is connected to the power source (source) through the resistor R1, and is connected to the first terminal 34a (specifically, the first terminal 34a through the resistor R2 and the power switch 28). Connected to the detection ground conductor 33). The second terminal 34b (specifically, the detection ground conductor 33 connected to the second terminal 34b) is connected to the ground (0v).

  In the unit detection unit 29 configured in this way, the first terminal 34a and the second terminal 34b are electrically connected by the counter electrode 42 (contact piece 42a) while the power switch 28 is turned on. In the connected state, the gate of the transistor Tr is approximately 0 v (L level), and the transistor Tr is in the on state (drain is at H level (detection signal)).

  Then, the detection control unit 35 determines that the first terminal 34a and the second terminal 34b are electrically connected (that is, the discharge unit 44 is mounted), and the control circuit unit A high voltage is generated by the piezoelectric transformer 21, the high voltage is supplied (applied) to the discharge needle 41, and power is supplied to the sirocco fan 14. Thereby, the static eliminator is driven.

  Even when the power switch 28 is turned on, the transistor Tr is not connected when the first terminal 34a and the second terminal 34b are not electrically connected by the counter electrode 42 (contact piece 42a). Is approximately 24v (H level), and the transistor Tr is turned off (drain is at L level).

  Then, the detection control unit 35 determines that the first terminal 34a and the second terminal 34b are not electrically connected (that is, the discharge unit 44 is not attached), and the control circuit The generation of high voltage by the unit and the piezoelectric transformer 21 is prohibited, and the supply of power to the sirocco fan 14 is prohibited, and the driving thereof is prohibited. At this time, the detection control unit 35 according to the present embodiment informs an external worker or the like that the discharge unit 44 is not mounted (although the power switch 28 is turned on). The light emitting diode 27 for error display is turned on.

  The unit case 43 has a through-hole 43a (as viewed from the penetration direction) for controlling the air flow. Specifically, the unit case 43 regulates air flow turbulence, A plate-like fluid control plate 43n for setting the direction is formed (integrated molding). The fluid control plate 43n is formed over the entire area of the through hole 43a in the penetrating direction (from end to end).

  The fluid control plate 43n is formed in parallel with the longitudinal direction of the discharge needle 41. In addition, two fluid control plates 43n are formed in this embodiment so as to partition the through holes 43a for each discharge needle 41. Specifically, the two fluid control plates 43n of the present embodiment divide the through-hole 43a into three substantially evenly in the vertical direction, and discharge needles 41 respectively on the upper and lower sides of the three divided. Is arranged. The interval at which the fluid control plate 43n is disposed is set in consideration so that it is difficult for the operator's finger or the like to enter the discharge needle 41 (the tip thereof) from both through directions of the through hole 43a. ing.

  In the static eliminator configured in this way, the high voltage generated by the piezoelectric transformer 21 is applied to the discharge needle 41 to generate corona discharge, whereby the air around the tip of the discharge needle 41 is ionized, The ionized air is blown out by the blowing operation of the sirocco fan 14 and, for example, dust is prevented from adhering to the electronic component.

Next, characteristic effects of the above embodiment will be described below.
(1) The discharge needle 41 and the counter electrode 42 are held in an insulating unit case 43 to form a discharge unit 44 together with the unit case 43, and a unit mounting portion (housing for detachably attaching the discharge unit 44 to the housing 13) Since the upper wall 13f, the lower housing wall 13g, and the like are formed, maintenance of the discharge needle 41 such as cleaning and replacement of the discharge needle 41 is facilitated (by removing the discharge unit 44 from the housing 13).

  In addition, the unit mounting portion is provided with a first terminal 34a and a second terminal 34b that are electrically connected by a contact piece 42a provided on the discharge unit 44 when the discharge unit 44 is mounted. The housing 13 is provided with a unit detector 29 that can detect whether the first terminal 34a and the second terminal 34b are electrically connected and output a detection signal. Therefore, it is possible to detect whether or not the discharge unit 44 is mounted while allowing downsizing. That is, when a switch member such as a push button switch that is turned on and off by a mechanical external force alone is provided on the housing side as in the prior art, the switch member is small. In the present invention, the first terminal 34a and the second terminal 34b are provided on the housing 13 side, and the contact piece 42a is provided on the discharge unit 44 side. It becomes possible to detect whether or not the discharge unit 44 is mounted while reducing the size without using a switch member such as a commercially available product.

  (2) The second terminal 34b is connected to the ground (0v), the contact piece 42a is integrally formed with the counter electrode 42, and the first terminal 34a is also grounded in a state where the discharge unit 44 is mounted on the unit mounting portion. Therefore, the number of parts can be reduced. That is, since the contact piece 42a is integrally formed with the counter electrode 42 originally provided as a dual-purpose part, the contact piece 42a (conductive member) does not increase the number of parts. Further, since the second terminal 34b electrically connected to the counter electrode 42 is connected to the ground, the terminal and wiring (in this embodiment, the detection ground conducting wire 33) are also used. Become. That is, if the counter electrode 42 is to be connected to the ground by another system, it is necessary to separately provide a terminal and a wiring dedicated to the counter electrode 42. However, this can be avoided, and as a result, the number of parts can be further reduced. Miniaturization can be achieved.

  (3) If the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, an error display is displayed. Since the light emitting diode 27 is turned on to notify the outside that the discharge unit 44 is not mounted, the operator can easily recognize the state.

  (4) When the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, a prohibition unit is included. The detection control unit 35 prohibits the generation of a high voltage by a high voltage generation circuit (a part of the piezoelectric transformer 21 and the control circuit board 22). As a result, application of a high voltage to the discharge needle 41 from the high voltage generation circuit (piezoelectric transformer 21 and part of the control circuit board 22) is prohibited, and anticipation in a state where the discharge needle 41 is not connected. Unexpected electrical discharge and electric shock due to this can be prevented. Further, in the present embodiment, generation of a high voltage is prohibited, so that useless power consumption can be suppressed.

  (5) When the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, a prohibition unit is included. The detection controller 35 further prohibits the driving of the sirocco fan 14. As a result, the driving of the sirocco fan 14 in a state where the discharge unit 44 is not mounted and the air outlet 13b is largely opened, specifically the rotational driving of the fan member 14b, is prevented, and wasteful power consumption is suppressed. Can do.

  (6) The discharge needle 41 is provided along the direction in which the longitudinal direction is orthogonal to the direction of blowing air, and the counter electrode 42 is orthogonal to the tip of the discharge needle 41 and the longitudinal direction of the discharge needle 41, that is, the direction of blowing air. Since the discharge needle 41 is provided in a direction opposite to the direction in which the longitudinal direction of the discharge needle 41 is provided along the direction in which the air is blown out, the size can be reduced in the direction in which the air is blown out.

  Further, since the discharge unit 44 is configured to be detachable along the direction perpendicular to the direction in which the air is blown to the housing 13, maintenance of the discharge needle 41 is facilitated. Specifically, since the static eliminator provided with the sirocco fan 14 is generally fixed with a distance from the work (workbench) set based on the air blowing capacity, the work of extracting the discharge needle in the blowing direction is a space. Although it becomes difficult, it can be avoided. That is, since the discharge unit 44 is configured to be detachable along a direction orthogonal to the direction of blowing air to the housing 13, even if the distance from the work (workbench) is set close and fixed, It does not require a large space in the blowing direction and can be easily removed for maintenance. Further, for example, if the discharge unit is detachable along the direction of blowing air to the housing 13, the discharge unit is likely to drop off to the work (workbench) side due to vibration and blowing force. Since it is configured to be detachable along the direction orthogonal to the blowing direction, the discharge unit 44 can be structured to be difficult to drop off on the work (work table) side.

The above embodiment may be modified as follows.
In the above embodiment, the upper wall engaging convex portion 43j is projected in a right triangle shape having a retaining edge, and the upper wall piece 43h (upper portion) is pressed by pressing the engaging releasing convex portion 43m downward. The wall engaging projection 43j) is bent downward to release the mechanical engagement, and the discharge unit 44 is detached from the housing 13. However, the present invention is not limited to this. Good.

  For example, as shown in FIGS. 8 to 10, the top wall engaging convex portion 43 j in the above embodiment is similar to the lower wall engaging convex portion 43 k as viewed from the penetrating direction of the through hole 43 a, and the top portion is wider. It is good also as the upper wall type | system | group joint convex part 43p which protruded in the triangle shape which becomes narrow. In FIG. 8 to FIG. 10, the same reference numerals are given to substantially the same parts as in the above embodiment.

  Specifically, in this example (see FIGS. 8 to 10), the housing upper wall 13f and the housing lower wall 13g are formed in substantially the entire range of the one side surface of the housing 13 (in the left-right direction in FIGS. 9 and 10). ing. Further, the upper wall engaging recess 13j and the lower wall engaging recess 13j which are recessed in the opposite directions are formed on the surfaces of the housing upper wall 13f and the housing lower wall 13g which are opposed to each other at substantially the center (in the horizontal direction in FIGS. 9 and 10). A wall engaging recess 13k is formed. Further, gripping claws 13l as guides slightly projecting in directions facing each other are provided at the front end portions of the housing upper wall 13f and the housing lower wall 13g in the projecting direction (the front side end portions in FIGS. 9 and 10). , 13m are formed. As shown in FIGS. 9 and 10, the gripping claws 13 l and 13 m in this example are formed in a pair of left and right sides (having discontinuous portions). That is, in this example, the unit mounting portion is configured by the above configuration.

  On the other hand, in the unit case 43 in this example (see FIGS. 8 to 10), instead of the gripping recesses 43f and 43g in the above embodiment, the gripping claws 13l and 13m are located at positions corresponding to the gripping claws 13l and 13m. A pair of gripping convex portions 43q and 43r are provided so as to be capable of gripping with each other. That is, in this example, as shown in FIG. 9 and FIG. 10, the portions gripped by the grip claws 13l and 13m are each divided into a pair of left and right, and the intermediate portion of the unit case 43 is gripped (engaged). The gripping convex portions 43q and 43r are formed so as to be disconnected so that the discharge unit 44 (unit case 43) can be taken out along the direction in which the air is blown when the air is released (that is, removed). . In the upper wall piece 43h (see FIG. 8), the upper wall system convex portion 43p is formed at the tip position corresponding to the upper wall engaging concave portion 13j.

  Further, in this example, as seen from the penetration direction of the through hole 43a (see FIGS. 9 and 10), a slip prevention groove 43s is formed in the ground side connecting portion 43e. In this example, three anti-slip grooves 43s extending in the vertical direction are arranged in parallel in the left-right direction, but other shapes may be used. Of course, also in this example, the unit detection part 29 and the counter electrode 42 (contact piece 42a) of the said embodiment are provided similarly.

  In the static eliminator configured in this way, for example, from the state shown in FIG. 9, the operator gently presses the portion of the anti-slip groove 43 s (in the depth direction in FIG. 9) while discharging the discharge unit 44 (unit case). 43) can be slid along a direction orthogonal to the direction of blowing out the air to release each engagement and remove the discharge unit 44 (see FIG. 10). At this time, the upper wall joint convex portion 43p and the lower wall engaging convex portion 43k are subjected to a reaction in the direction of being dented by their slopes, and the upper wall piece 43h and the lower wall piece 43i are bent (see FIG. 10) The engagement with the upper wall engaging recess 13j and the lower wall engaging recess 13k is released.

Even if it does in this way, the effect similar to the effect of the said embodiment can be acquired.
In the above embodiment, the second terminal 34b is connected to the ground (0v), and the contact piece 42a is integrally formed with the counter electrode 42. However, the present invention is not limited to this. 42a (conductive member) may be provided independently of the counter electrode 42. In this case, of course, it is necessary to provide each terminal and wiring.

  In the above embodiment, when the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, the light emitting diode However, the present invention is not limited to this, and other notification means (for example, a buzzer or the like) may notify that the discharge unit 44 is not mounted. Of course, a combination of a plurality of notification means may be provided, or a configuration having no notification means may be adopted.

  In the above embodiment, when the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, the prohibition unit In the detection control unit 35 including the high voltage generation circuit (piezoelectric transformer 21 and a part of the control circuit board 22) is prohibited from being generated, but the present invention is not limited to this. For example, only the notification by the notification means (light emitting diode 27, buzzer, etc.) may be performed.

  In the above embodiment, when the unit detection unit 29 (detection control unit 35) determines that the first terminal 34a and the second terminal 34b are not electrically connected, the prohibition unit The detection control unit 35 including the above also prohibits the driving of the sirocco fan 14, but is not limited thereto, and the driving of the sirocco fan 14 may not be prohibited.

  In the above embodiment, the discharge needle 41 is provided along the direction in which the longitudinal direction is orthogonal to the direction of blowing air, and the counter electrode 42 is opposed to the tip of the discharge needle 41 in the longitudinal direction of the discharge needle 41. Although provided, it is not limited to this, For example, it is good also as what was provided along the direction where the longitudinal direction of the discharge needle 41 blows off air.

  In the above embodiment, the discharge unit 44 is configured to be detachable along the direction orthogonal to the direction of blowing out the air with respect to the housing 13, in other words, the discharge unit 44 is blown out of the air into the housing 13. Although the unit mounting portion that is detachable along the direction orthogonal to the direction is formed, the detachable direction may be configured as another direction.

  In the above embodiment, the discharge unit 44 is attached to the housing 13 by mechanically engaging the unit case 43 with the housing 13, but is not limited to this, for example, the discharge needle 41, It is good also as what is mounted | worn by engaging (fitting and connecting etc.) the counter electrode 42. FIG.

  Of course, the unit detection unit 29 of the above embodiment can be changed to another circuit configuration as long as it can detect whether or not the first terminal 34a and the second terminal 34b are electrically connected. May be.

  In the above embodiment, the discharge needle 41 is disposed in the housing 13 via the connection slit 13d and is electrically connected to the piezoelectric transformer 21 (its spring terminal 23a) in the housing 13. However, the present invention is not limited to this, and it may be connected to the piezoelectric transformer 21 (its connection terminal) outside the housing 13 (exposed position).

  In the above embodiment, the connection terminal of the piezoelectric transformer 21 that is electrically connected to the discharge needle 41 is the spring terminal 23 a that is flexible in the mounting direction of the discharge unit 44, but the discharge unit 44 is the housing 13. If it is electrically connected to the discharge needle 41 by being attached to the connector, it may be changed to a connection terminal of another configuration.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(A) In the static eliminator according to any one of claims 1 to 5, the housing has a suction port that opens in a direction orthogonal to the air outlet, and the fan is connected to the air through the suction port. A sirocco fan for sucking one air and blowing air in a direction orthogonal to the direction sucked through the outlet, and the discharge needle has a longitudinal direction perpendicular to the air blowing direction The counter electrode is provided to face the tip of the discharge needle and the longitudinal direction of the discharge needle, and the discharge unit is orthogonal to the direction of blowing the air to the housing. A static eliminator configured to be detachable along the line.

  According to this configuration, the discharge needle is provided along the direction in which the longitudinal direction is perpendicular to the direction of blowing air, and the counter electrode is perpendicular to the tip of the discharge needle and the longitudinal direction of the discharge needle, that is, the direction of blowing air. Since it is provided so as to oppose the direction, the discharge needle can be reduced in size in the direction in which air is blown compared to the case in which the longitudinal direction of the discharge needle is provided along the direction in which air is blown.

  Further, since the discharge unit is configured to be detachable along the direction perpendicular to the direction of blowing the air to the housing, maintenance of the discharge needle is facilitated. Specifically, since the static eliminator equipped with a sirocco fan is generally fixed at a fixed distance from the work (workbench) based on the air blowing capacity, the work of extracting the discharge needle in the blowing direction is space-consuming. It becomes difficult, but it can be avoided. That is, since the discharge unit is configured to be detachable along a direction perpendicular to the direction of blowing air to the housing, even if the distance from the work (workbench) is set close and fixed, the discharge direction It can be easily removed and maintained without requiring a large space. Also, for example, if the discharge unit is detachable along the direction of blowing air to the housing, the discharge unit is likely to drop off to the work (workbench) side due to vibration and blowing force, etc. By being configured to be detachable along a direction orthogonal to the blowing direction, a structure in which the discharge unit is difficult to drop off on the work (workbench) side can be obtained.

  DESCRIPTION OF SYMBOLS 13 ... Housing, 13b ... Air outlet, 14 ... Sirocco fan (fan), 21 ... Piezoelectric transformer which comprises a part of high voltage generation circuit, 22 ... Control circuit board which comprises a part of high voltage generation circuit, 27 ... Light emitting diode (notification means), 29... Unit detection part (unit detection means), 34 a... First terminal, 34 b... Second terminal, 35 .. detection control part (prohibition means), 41. Electrode, 42a ... contact piece (conductive member), 43 ... unit case, 44 ... discharge unit.

Claims (5)

A housing having an air outlet;
A fan accommodated and held in the housing for blowing air out of the outlet;
A discharge needle provided at the outlet;
A counter electrode provided at the outlet so as to be separated from the discharge needle, and ionizing the air around the tip of the discharge needle by generating a corona discharge by applying a high voltage to the discharge needle, A static eliminator that blows out the ionized air with the fan,
The discharge needle and the counter electrode are held in an insulating unit case to form a discharge unit together with the unit case,
The housing is formed with a unit mounting portion that allows the discharge unit to be attached and detached.
The unit mounting portion is provided with a first terminal and a second terminal that are electrically connected by a conductive member provided in the discharge unit by mounting the discharge unit,
The housing is provided with unit detecting means capable of detecting whether or not the first terminal and the second terminal are electrically connected and outputting a detection signal. Static eliminator. The static eliminator according to claim 1,
One of the first terminal and the second terminal is connected to ground,
The conductive member is integrally formed with the counter electrode, and the other of the first terminal and the second terminal is connected to the ground in a state where the discharge unit is mounted on the unit mounting portion. Characterized static eliminator. The static eliminator according to claim 1 or 2,
When the unit detection means determines that the first terminal and the second terminal are not electrically connected, the discharge unit is not mounted based on the detection signal. A static eliminator comprising an informing means for informing the outside. In the static elimination apparatus of any one of Claims 1 thru | or 3,
A high voltage generating circuit for generating a high voltage that is housed and held in the housing and electrically connected to the discharge needle in a state in which the discharge unit is mounted;
When the unit detection means determines that the first terminal and the second terminal are not electrically connected, the discharge from the high voltage generation circuit based on the detection signal. A neutralizing device comprising: prohibiting means for prohibiting application of a high voltage to the needle. In the static elimination apparatus of Claim 4,
The prohibiting means further includes the fan based on the detection signal when the unit detection means determines that the first terminal and the second terminal are not electrically connected. The static eliminator characterized by prohibiting the driving of the battery.

Images