JP2011244408A - Noise filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noise filter having a grip that does not need to newly add an additional grip-dedicated component, does not have a projection for the grip on a side face and a top face, and does not interfere with adjacent other devices even in a narrow space.SOLUTION: As for noise filters 1 and 20 according to the present invention application, a grip part is formed by providing an overhang plate holding an earth terminal 16 at both ends of a housing adjoining a terminal block 6 of the housing 2 enclosing a filter circuit part and by expanding the overhang plate in the direction of a side plate of the housing 2. In this case, the overhang plate is made to be constituted with an L-shaped component 14 attached tightly on an end plate 7 adjoining the terminal block 6, and an upper side part 14a of the L-shaped component 14 is made to be the grip part on which the earth terminal 16 is mounted, or a marginal part of an end plate 21 adjoining the terminal block 6 is made to be constituted with an overhang part 17 bent in an outer direction in an L-shape, and the overhang part 17 is made to be the grip part on which the earth terminal 16 is mounted.

Description

  The present invention relates to a noise filter, and in particular, a large-sized noise that is easy to carry and attach to other devices by providing a handle that also serves as an attachment portion of a ground terminal at both ends of a casing that is an outer shell case of a filter Regarding filters.

  Conventionally, various noise filters have been developed in order to prevent these devices from malfunctioning due to noise entering the electrical and electronic devices from the outside via a power line, a communication line, or the like. These noise filters are composed of a composite component of a choke coil and a capacitor, and are usually housed in a casing that forms the outer shell case of the filter. It is formed by gathering at the end. For example, Patent Document 1 describes a noise filter that attenuates noise flowing in a line by connecting a common mode choke coil wound around a toroidal magnetic core to a power supply line, and this incorporates a toroidal magnetic core. However, the entire outer shape is covered with a substantially rectangular parallelepiped casing (shield case), and a plurality of external connection terminal portions are exposed at both ends in the longitudinal direction, and the bottom plate of the casing Is extended to the outside in the form of a flange to form a mounting portion for an external device, and a terminal portion is provided on the protruding flange portion.

  Further, in Patent Document 2, in order to reduce the mounting height to the electronic device, the side portion of the outer shell case of the filter is formed on an inclined surface, and the input terminal and the ground terminal are perpendicular to the inclined surface. A noise filter is described in which an inlet case is disposed and a mounting flange is projected from the bottom surface. Furthermore, Patent Document 3 discloses a noise filter in which a common connection portion that can selectively connect two types of external terminal portions of an insert member and an inlet member that serve as a power connection connector is provided on the filter body side.

Japanese Patent Application Laid-Open No. 2005-1981146 Japanese Patent Laid-Open No. 2010-16854 Japanese Patent Laid-Open No. 2006-269467

  Each of the noise filters described above is a small filter that can be easily carried with one hand, but there are also large noise filters that must be lifted with both hands. This large noise filter is considerably heavy and has a rectangular parallelepiped shape that does not have any special protrusions. Therefore, it is inconvenient to carry and handle when attached to the target equipment. In particular, for large electrical and electronic equipment such as large power supply equipment, the noise filter is also large, and when such a large noise filter is attached to the vertical side plate portion of the equipment by bolting, it takes two people. I was forced to work and there was a risk of falling accidents during the work. For this reason, particularly in a large-sized noise filter, a handle is provided at an appropriate position of the rectangular parallelepiped housing for carrying or mounting, but the handle protrudes from the upper surface or side surface of the housing. In a narrow installation space, there are problems such as interfering with other devices, and a separate handle is provided in the filter housing, which increases the number of parts and the number of man-hours required to install the handle, resulting in high costs. was there.

  The present invention has been made in view of such circumstances, and uses a ground terminal mounting portion formed at the end of a filter casing (case), and the shape of the ground terminal mounting portion is slightly changed. An object of the present invention is to provide a noise filter in which a handle portion is formed only by changing.

  The present invention also has a handle function without newly adding a separate handle-dedicated part, and has no protrusion for the handle on the side surface or top surface of the case, and is adjacent even in a narrow space. Another object of the present invention is to provide a noise filter that can be mounted without interfering with other devices.

  In order to achieve the above object, the noise filter according to the present invention is provided with a projecting plate for holding a ground terminal at both ends of the casing adjacent to the terminal block of the outer casing surrounding the filter circuit section, The overhanging plate is extended in the direction of the side plate of the casing to form a handle portion.

  In addition, a projecting plate that forms a ground terminal is provided at both ends of the housing adjacent to the terminal block of the outer housing that surrounds the filter circuit unit, and the projecting plate extends in the direction of the side plate of the housing. A noise filter characterized by having a handle portion.

  According to one aspect of the present invention, there is provided a noise filter in which the overhang plate is configured by an L-shaped member fastened to an end plate adjacent to the terminal block, and the L-shaped member is a handle portion. The

  According to still another aspect of the present invention, the overhanging plate is formed by bending an edge of an end plate adjacent to the terminal block outward in an L shape, and using the overhanging plate as a handle portion. A filter is provided.

  In the noise filter of the present invention, the overhanging plate having the ground terminal is provided at both ends of the housing adjacent to the terminal block of the filter housing, and the overhanging plate is used as the handle portion. The overhanging portion can be carried and carried, and the installation work can be performed safely and easily even when installed on the vertical side surface of the electric / electronic equipment. Since the projecting plate extends in the direction of the side plate of the casing, the entire casing does not increase in size, and it is not necessary to newly provide a dedicated member for the handle, thereby reducing the cost. .

It is an external appearance perspective view of the noise filter which concerns on Example 1 of this invention. It is a side view of the noise filter shown in FIG. It is a front view of the longitudinal direction edge part of the noise filter shown in FIG. It is a top view of the noise filter shown in FIG. It is an external appearance perspective view of the noise filter which concerns on Example 2 of this invention. FIG. 6 is a side view of the noise filter shown in FIG. 5. It is a front view of the longitudinal direction edge part of the noise filter shown in FIG. FIG. 6 is a plan view of the noise filter shown in FIG. 5.

  Next, various embodiments of the present invention will be described with reference to the drawings. In addition, although all of these embodiments are illustrated for a large noise filter, the present invention is not limited to such a large filter, and the internal circuit configuration is also a single-phase or three-phase circuit, etc. The present invention can also be applied in the same manner.

  1 to 3, a large noise filter 1 according to the first embodiment includes a filter circuit unit including a choke coil that attenuates noise flowing between a line and a ground and various capacitors (Cx capacitor, Cy capacitor, etc.). (Not shown) is accommodated in a rectangular parallelepiped or trapezoidal outer shell case (housing) 2 as a whole. The outer shell case 2 includes a bottom plate 4 provided with a mounting hole 3 for a target device (not shown), left and right side plates 5, and end plates 7 (front and rear portions in the longitudinal direction exposing a terminal block 6 described later) An upper end plate 11, a lower end plate 12), and an upper plate 8 coupled to the upper edges of the side plate 5 and the end plate 7. As shown in the drawing, the side plate 5 and the upper plate 8 are formed with ventilation slots 9 for releasing internal heat.

  The terminal block 6 is fixed to the side plates by set screws 10 so as to be sandwiched between the left and right side plates 5 at the openings at both ends in the longitudinal direction of the case 2. As clearly shown in FIGS. 1 and 3, an upper end plate 11 and a lower end plate 12 are provided between the upper portion of the terminal block 6 and the upper plate 8 and between the lower portion of the terminal block 6 and the bottom plate 4, respectively. It is blocked by The upper end plate 11 is formed by bending the end portion of the upper plate 8 into an L shape, so that the upper end plate 11 and the upper plate 8 can be formed as an integral plate member. Of course, the bottom plate 4 and the side plate 5 may be formed of an integral member formed by bending. Various terminal portions 13 connected to a power supply terminal and other external devices are provided on the terminal block 6, and the lower end plate 12 positioned on the lower side of the terminal block 6 is provided with the first embodiment. Then, the L-shaped member 14 bent into the L-shape is fixed by means such as a set screw 15. A ground terminal 16 is provided on one side of the L-shaped member 14, specifically, the upper side 14 a on the upper side of the L-shape.

  The L-shaped member 14 has a shape extending long in the lateral direction with respect to the longitudinal direction of the case 2, that is, in the direction toward the left and right side plates 5, and the ground terminal 16 is formed on the upper side portion 14 a of the L-shaped member 14. It is installed near one corner. The terminal block 6 and the upper and lower end plates 11 and 12 have substantially the same configuration at the front and rear portions in the longitudinal direction of the case 2, and the L-shaped member 14 is provided in the same manner on the end plates 7 at the front and rear portions of the case. It has been.

  With such a configuration, the illustrated large noise filter 1 can be carried by placing the hand on the overhanging upper side portion 14a of the L-shaped member 14. Therefore, in this embodiment, the upper side portion 14a of the L-shaped member 14 is It is a handle portion of the noise filter 1 that also serves as an attachment portion of the ground terminal 16. Further, not only for carrying but also for attaching to the equipment, for example, when attaching the noise filter 1 to the vertical side surface of the equipment, the L-shaped member 14 serving as a handle portion without placing a hand on the bottom plate 4 by hand. The large noise filter 1 can be easily attached by a safe operation by grasping and lifting and attaching the bottom plate portion to the vertical side surface of the device. In addition, it is possible to obtain a handle portion by simply extending a member (L-shaped piece member) for holding a conventional ground terminal or the ground terminal block itself in the lateral direction, and it is necessary to newly provide a special member dedicated to the handle. Therefore, the manufacturing cost can be reduced. Further, the handle portion, that is, the L-shaped member 14 of this embodiment is provided so as to be sandwiched between the left and right side plates 5 and protrudes from the outer surfaces of the side plates 5 and the upper plate 8 as shown in FIG. Because there is no, it does not interfere with other equipment and parts even in a small installation space.

  As a variation of the first embodiment, the ground terminal itself may be formed of an L-shaped member, and the function as the handle portion and the function as the ground terminal portion may be combined with one member.

  A noise filter 20 according to a second embodiment of the present invention is shown in FIGS. In the second embodiment, the bottom plate 4, the left and right side plates 5, and the upper plate 8 of the outer shell case 2 are the same as those of the first embodiment, and have a rectangular parallelepiped shape or a side-view trapezoidal shape as a whole. Further, the terminal block 6 arranged so as to be sandwiched between the side plates 5 in the longitudinal direction of the case 2 is the same as that of the first embodiment shown in FIGS. The form of the end plate 21 (upper end plate 22 and lower end plate 23) formed on the end portion of this and the grip portion provided on the end plate 21 is different.

  4 to 6, as in the first embodiment, a filter circuit section (not shown) including a choke coil for attenuating noise flowing between the line and the ground and various capacitors (Cx capacitor, Cy capacitor, etc.). ) Is accommodated in a rectangular parallelepiped or trapezoidal outer shell case (housing) 2 as a whole. The outer shell case 2 includes a bottom plate 4 provided with a mounting hole 3 for a target device (not shown), left and right side plates 5, an end plate 21 in the longitudinal direction where the terminal block 6 is exposed, and a side plate. 5 and an upper plate 8 coupled to the upper edge of the end plate 21. As shown in the drawing, the side plate 5 and the upper plate 8 are formed with a ventilation slot 9 for releasing internal heat, as in the first embodiment.

  On the terminal block 6 exposed from the end plates at both ends in the longitudinal direction of the case 2 and sandwiched between the left and right side plates 5, there are provided various terminal portions 13 connected to power terminals and other external devices. The space between the terminal block 6 and the bottom plate 4 and the space between the terminal block 6 and the upper plate 8 are closed by the lower end plate 23 and the upper end plate 22, respectively. As in the first embodiment, the upper end plate 22 is formed by bending the end portion of the upper plate 8 into an L shape, thereby forming the upper end plate 22 and the upper plate 8 as an integral plate member. You can also Moreover, you may comprise the baseplate 4 and the side plate 5 by the integral board member by a bending process. The terminal block 6 is fixed to the side plates with set screws 10 so as to be sandwiched between the left and right side plates 5 at the openings at both ends in the longitudinal direction of the case 2.

  In the second embodiment, the upper edge of the lower end plate 23 located on the lower side of the terminal block 6 is bent in an L shape so as to protrude outward in the longitudinal direction of the case 2. The bent overhanging portion 17 extends long in the lateral direction of the case 2, that is, in the direction toward the left and right side plates 5, and a ground terminal 16 is provided at one corner. In Example 2, the overhanging portion 17 has the same form as the end plate 21 in the longitudinal direction of the case 2 and is integrally formed on the upper edge of the lower end plate 23 of the terminal block 13 by bending. Has been.

  With such a configuration, the L-shaped member functions as a handle portion and a ground terminal portion as a single member. The illustrated large noise filter 20 can be carried by hand over the overhanging portion 17 of the end plate 21. Therefore, in the second embodiment, the overhanging portion 17 serves as a ground terminal mounting portion. It has become. Further, not only for carrying but also for attaching to a large device, for example, when attaching to a vertical side surface of the device, the handle portion of the overhanging portion 17 is lifted by hand without placing a hand on the bottom plate 4, By attaching the bottom plate portion to the vertical side surface of the device, the attachment can be easily performed in a safe operation. In addition, the bending overhanging portion 17 for holding the ground terminal can be formed as a grip portion simply by extending it in the lateral direction, and it is not necessary to newly provide a special member dedicated to the grip, thereby reducing the manufacturing cost. be able to.

  Further, the handle portion of the present embodiment is formed so as to be sandwiched between the left and right side plates 5, and does not protrude at all on the outer surface of the side plate 5 or the upper plate 8 as shown in FIG. But it doesn't get in the way of other devices and parts. In particular, in the second embodiment, the lower end plate 23 below the terminal block 6 can be easily formed by bending a sheet metal, and there is no need to add new parts for the handle, which is extremely simple and reduces the manufacturing cost. There is an advantage that can be achieved.

  In the case of the second embodiment, it is not necessary to provide a member for holding the ground terminal 16, and it has a handle function and a ground terminal holding function by simply bending the edge of the end plate adjacent to the terminal block 6. The number of manufacturing steps is not increased, and the cost can be further reduced.

  As a variation of the second embodiment, the ground terminal itself may be formed of an L-shaped member, and the function as the handle portion and the function as the ground terminal portion may be combined with one member.

  In Examples 1 and 2, the width H in the longitudinal direction of the case of the L-shaped member 14 or the overhanging portion 17 that holds the ground terminal (FIGS. 1 and 4) is set to the noise filter 1 The length required to lift 20 is formed. In this case, although it depends on the size and weight of the noise filter to be applied, it is preferable that the width is set so as not to protrude outward from the bottom plate 4 having the mounting holes 3.

  In this embodiment, the member is an L-shaped member that holds the ground terminal. However, the edge of the end plate may be further extended and bent to form a U-shaped member. The U-shaped member may be extended and curved, and the shape of the handle is not limited to that described above.

  As described above, according to the present invention, it is not necessary to separately provide a dedicated handle for carrying in the outer shell case of the noise filter by forming the handle using the mounting portion of the ground terminal. The number of steps for forming and processing are very simple, and the entire case is not enlarged for the handle, and the handle does not interfere with other devices, so that the manufacturing cost can be reduced. The present invention is particularly useful when applied to large to medium noise filters.

DESCRIPTION OF SYMBOLS 1,20 Noise filter 2 Outer shell case 3 Mounting hole 4 Bottom plate 5 Side plate 6 Terminal block 7,21 End plate 8 Upper plate 9 Groove hole 10 Set screw 11,22 Upper end plate 12,23 Lower end plate 13 Terminal part 14 L-shaped member 16 Ground terminal 17 Overhang

Claims (4)

  Adjacent to the terminal block of the outer casing that surrounds the filter circuit section, an extension plate that holds the ground terminal is provided at both ends of the casing, and the extension plate extends in the direction of the side plate of the casing. A noise filter characterized by a handle.   Adjacent to the terminal block of the outer casing that surrounds the filter circuit section, a projecting plate that forms a ground terminal is provided at both ends of the casing, and the projecting plate is extended toward the side plate of the casing. A noise filter characterized by a handle.   3. The noise according to claim 1, wherein the projecting plate is configured by an L-shaped member fastened to an end plate adjacent to the terminal block, and the L-shaped member is used as the handle portion. filter.   The extension plate is formed by bending an edge of an end plate adjacent to the terminal block outwardly into an L shape, and the extension plate is used as a handle portion. Noise filter.

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