KR200247857Y1 - Structure for mounting of Power factor corrector - Google Patents

Abstract

The present invention is employed in home appliances and office equipment using a switching power supply, and a power factor corrector (PFC) mounting structure for suppressing an increase in harmonics and a decrease in power factor due to pulsed current generated from the switching power supply. The mounting structure of the power factor correction apparatus according to the present invention includes a substrate, a housing surrounding the substrate, and a frame in which the housing is mounted, the plurality of guide protrusions protruding from the lower end of the housing and guide grooves formed in the frame. When this slide is engaged and the housing is mounted to the frame, the end of the guide protrusion is located inside the frame. As a result, the durability of the frame is improved, and through holes exposed to the lower surface of the frame after the coupling are removed, so that it is not necessary to use a separate part for blocking the through holes, thereby reducing the production cost of the product.

Description

Structure for mounting of power factor corrector

The present invention relates to a power factor corrector (PFC), and more particularly, to a mounting structure of a power factor corrector mounted inside a frame of a home appliance.

A general power factor correction circuit is employed in office equipment and home appliances that use a switching power supply to compensate for an increase in harmonics and a decrease in power factor due to a pulsed current generated by the switching power supply.

The power factor correction circuit is formed directly on a part of the substrate on which the main electrical circuit of the home appliance is formed, or is formed and used on a substrate embedded in a housing of the power factor correction apparatus detachably formed in the home appliance.

Figure 1 shows the mounting structure of the power factor correction device used in home appliances as a separate component.

As shown, the power factor correction apparatus 10 includes a substrate 20 having a power factor correction circuit (not shown) formed on a lower surface thereof, and a housing 30 in which the substrate 20 is mounted by a predetermined fastening means 21. It includes. In addition, the power factor correction device 10 has a first guide protrusion 31, a second guide protrusion 33, and a locking member 35 protruding from the rear, respectively, formed at the front and rear lower ends of the housing 30, respectively. By being coupled to the first and second coupling holes 41 and 43 and the locking groove 45 formed in the 40 is to be temporarily coupled. Here, the frame 40 is a part surrounding an outer case of a home appliance or a part of an inner case surrounding a main electric circuit embedded therein.

After the power factor correction apparatus 10 and the frame 40 are temporarily coupled, the power factor correction apparatus 10 is completely fixed on the frame 40 by a predetermined coupling means. The coupling means includes a fastening portion 37 protruding from the housing 30 and having a first fastening hole 37a, a second fastening hole 30a and a screw 30a formed in the frame 40, and the like. Various methods can be used.

However, when the power factor correction device 10 is mounted to the frame 40 as described above, the strength of the frame 40 is reduced by the coupling holes 41 and 43 formed to penetrate the frame 40. There was a problem that the durability is lowered.

Then, in order to suppress the deterioration of the durability of the frame 40, the coupling holes 41 are exposed in a punched state on the lower surface of the frame 40 after the first and second guide protrusions 31 and 33 are coupled. The disadvantage that the production cost is increased because the 43 must be prevented as a separate member.

In addition, in order to completely fix the power factor correction apparatus 10 to the frame 40, a separate coupling means must be further provided, thereby increasing the production cost and production process.

The present invention has been devised to solve the above problems, and provides a mounting structure of the power factor correction apparatus whose structure is improved to reduce the process and cost consumed to install the power factor correction apparatus, and to suppress the durability degradation of the frame. Its purpose is to.

1 is an exploded perspective view showing a mounting structure of a conventional power factor correction device.

Figure 2 is an exploded perspective view showing a mounting structure of the power factor correction apparatus according to an embodiment of the present invention.

3A to 3B are cross-sectional views showing cross sections taken along line A-A before and after the power factor correction device of FIG. 2 is mounted on a frame.

4 is a cross-sectional view showing a section of line B-B after the power factor correction apparatus of FIG. 2 is mounted to the frame;

* Explanation of Signs of Major Parts of Drawings *

50: power factor correction device 60: substrate

70 housing 71 first guide projection

73: second guide projection 75: coupling member

80: frame 81: first guide groove

83: second guide groove 83a: recessed portion

83b: guide slot 83c: coupling piece

85: hanging groove

In order to achieve the above object, the mounting structure of the power factor correction apparatus according to the present invention, the housing coupled to the substrate on which the power factor correction circuit is formed, and the mounting structure of the power factor correction apparatus including a frame on which the housing is mounted, A guide formed on the inside of the frame such that a plurality of guide protrusions downwardly protruding from the bottom surface of the housing, a recess formed on the frame to seat the guide protrusion, and an end of the guide protrusion seated on the recess are slide-engaged. And a support means for supporting the housing after the guide groove including a slot and the guide protrusion and the coupling part are coupled to each other.

Here, it is preferable that the upper surface of each of the guide slots is formed by a coupling piece protruding from the frame so that the bottom surface of the guide slot covers a part of the upper portion of the recess.

The support means includes a locking member protruding from a lower end of the housing and having a locking protrusion protruding from a lower surface thereof, and a locking groove formed on the frame such that the locking protrusion is inserted and fixed when the end of the guide protrusion is inserted into the guide slot. It is preferable to include.

Hereinafter, with reference to the accompanying drawings will be described the mounting structure of the power factor correction apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 2, the power factor correction apparatus 50 includes a substrate 60 on which a predetermined power factor correction circuit (not shown) is formed, and a housing 70 in which the substrate 60 is embedded. Here, the housing 70 and the substrate 80 are coupled by a predetermined fastening means such as a screw 60a. The power factor correction circuit is formed on the bottom surface of the substrate 10 to be located inside the housing 70.

In order to mount the power factor correction device 50 configured as described above to the frame 80, a plurality of guide protrusions 71 and 73 protruding from the lower surface of the housing 70 and guide protrusions 81 and 83 are inserted. A mounting structure including a plurality of guide grooves 81 and 83 formed in the frame 80 is employed. In addition, after the guide protrusions 71 and 73 and the guide grooves 81 and 83 are coupled to the mounting structure, the mounting structure supports to prevent the housing 70 from being moved in a direction opposite to that in which the housing 70 is mounted. It further comprises a support means. Here, the support means protrudes at the lower end of the housing 70 and the locking member 75 protruding from the lower surface of the housing 70, guide protrusions 71, 73 and guide grooves 81, 83. ) Includes a locking groove 85 formed on the frame 80 so that the locking projection 76 is inserted and fixed after the coupling.

As shown, the guide protrusions 71 and 73 in the present embodiment are first guide protrusions 71 protruding from the front lower end of the housing 70 and a plurality of protrusions protruding from the lower end of the side wall of the housing 70. The second guide protrusion 73 of the. The guide grooves 81 and 83 are formed of a first guide groove 81 and a second guide groove formed on the frame 80 such that each of the first and second guide protrusions 71 and 73 slides. 83).

The first guide protrusion 71 protrudes from the front end of the first position fixing protrusion 71a protruding a predetermined length downward from the front of the housing 70. The first guide groove 81 is recessed inward from the upper surface of the frame 80 to form a first recessed portion 81a and a part of an upper portion of the first recessed portion 81a. It includes a first engaging piece (81c) protruding from the. Here, the guide slot 81b into which the end of the first guide protrusion 71 is inserted is formed by the distance between the bottom surface of the first recessed portion 81a and the bottom surface of the first engaging piece 81c.

Then, after the first guide protrusion 71 and the first guide groove 81 is coupled, the predetermined position fixing means to suppress the first guide protrusion 71 from flowing left and right inside the first guide groove 81. The first guide protrusion 71 and the first guide groove 81 are respectively provided. The position fixing means protrudes downward from the front of the housing 70 and the first position fixing groove 81d formed in a slit shape at a substantially center portion of the first coupling piece 81c to support the first coupling protrusion 71. It consists of the 1st position fixing protrusion 71a. According to this configuration, when the end of the first guide protrusion 71 is inserted into the first guide slot 81b, the first positioning protrusion 71a is inserted into the first positioning groove 81d, thereby providing It can be suppressed that the 1st guide protrusion 71 moves transversely in the 1st guide groove 81. As shown in FIG.

The second guide protrusion 73 protrudes from the ends of the plurality of protruding pieces 73a protruding to a predetermined length from the lower end of both side walls of the housing 70. The second guide groove 83 has a second recess 83a recessed inward from an upper surface of the frame 80 so that the second guide protrusion 73 can be inserted, and an upper portion of the second recess 83a. It includes a second engaging piece (83c) protruding from the frame 80 to cover a portion of. The second guide slot 83b is partitioned by the bottom surface of the second concave portion 83a and the bottom surface of the second coupling piece 83c configured as described above, and the second guide protrusion 73 and the second guide groove ( When the slide 83 is coupled, the end of the second guide protrusion 73 is inserted into the second guide slot 83b.

After the engagement of the second guide protrusion 73 and the second guide groove 83, the position fixing means is arranged so that the second guide protrusion 73 does not flow laterally inside the second guide groove 83. It is provided in each of the guide protrusion 73 and the second guide groove 83. The position fixing means is provided on the side of the second engaging piece 83c in a slit shape so that the projecting piece 73a connecting the second guide protrusion 73 to the housing 70 and the projecting piece 73a can be inserted. And a second position fixing groove 83d formed. According to such a structure, after the 2nd guide protrusion 73 and the 2nd guide groove 83 are combined, it is suppressed that the 2nd guide protrusion 73 flows laterally inside the 2nd guide groove 83. As shown in FIG. You can do it.

Meanwhile, the ends of the guide protrusions 71 and 73 are tapered so that the cross-sectional area of the ends of the guide protrusions 71 and 73 is formed to be narrower than the cross-sectional area of the base end. It can be formed thicker than the thickness of the slot (81b) (83b). According to the guide protrusions 71 and 73 and the guide slots 81b and 83b formed as described above, the mutual slide coupling may be more firm.

Although not shown, the upper surface of the frame 80 on which the housing 70 is seated is recessed inward, and the first and second coupling pieces 81c and 83c protrude from the bottom surface or sidewall of the recess. In the case of forming the first and second guide slots 81b and 83b, the object of the present invention may be achieved.

In addition, the number, position, and shape of the guide protrusions 71 and 73 and the guide grooves 81 and 83 may also be variously modified by those skilled in the art.

When the housing 70 slides forward on the frame 80 to couple the guide protrusions 71 and 73 and the guide grooves 81 and 83 configured as described above, the lower surface of the coupling member 75 The protruding locking protrusion 76 is inserted into the locking groove 85 formed on the upper surface of the frame 80. As such, when the locking protrusion 76 is inserted into the locking groove 85, the housing 70 is supported to prevent the housing 70 mounted on the frame 80 from moving backward. At this time, after the guide protrusions 71 and 73 are completely inserted into the guide grooves 81 and 83, the locking protrusions 76 are inserted into the housing grooves so that the locking protrusions 76 may be inserted into the locking grooves 85. It is preferable that the locking member 75 is formed to protrude from the rear of the 70 by a predetermined distance.

FIG. 3A illustrates a state in which the power factor correction device 50 is temporarily coupled before being mounted on the frame 80. As shown in FIG. 3A, the first guide protrusion 71 is inserted into the first recess 81a. In this state, the locking projection 76 is supported in contact with the upper surface of the frame 80. Accordingly, the coupling member 75 is bent so that its end is directed upward.

3B is for explaining the state after the power factor correction device 50 is completely mounted to the frame 80, and as shown, the first guide after the power factor correction device 50 is mounted to the frame 80. The end of the projection 73 is inserted and fixed to the first guide slot 83b, and the locking protrusion 71 of the coupling member 75 is inserted and fixed to the locking groove 85. At this time, the coupling member 75 is preferably formed of an elastic body having a predetermined elastic force in order to automatically insert the locking projection 76 into the locking groove 85 in a bent state.

4 is for explaining the coupling state of the second guide protrusion 73 and the second guide groove 83 after the power factor correction device 50 is mounted to the frame 80. As shown in the drawing, after the power factor compensator 50 is completely coupled to the frame 80, the end of the second guide protrusion 73 is extended from the second recess 83a of the second guide groove 83. 80) is completely inserted into the second guide slot 83b extending inwardly.

As the guide protrusions 71 and 73 and the guide grooves 81 and 85 and the locking protrusion 76 and the locking groove 85 are coupled to each other, there is no need for a separate coupling means 30a (see FIG. 1). The power factor correction device 50 may be fixed to the frame 80.

In addition, as the first and second guide slots 81b and 83b are formed in the frame 80 and combined with the first and second guide protrusions 71 and 73, the through holes are exposed on the lower surface of the frame 80. Since it is not possible, the durability of the frame 80 can be improved.

On the other hand, although not shown, in order to facilitate the molding of the frame 80 in the present embodiment, the upper and lower parts are separated and formed to form the coupling pieces 81c and 83c in the upper portion and the coupling piece 81c in the lower portion. After forming the concave portions 81a and 83a positioned at the lower portions of the 83c, the upper and lower frames 80 may be coupled to each other.

According to the mounting structure of the power factor correction device 50 according to the present invention as described above, because the power factor correction device 50 can be mounted without forming a through hole in the frame 80, the frame 80 by the through hole ), There is an effect that can suppress the degradation of durability.

Accordingly, a separate member for blocking the through hole exposed on the lower surface of the frame 80 exposed after the power factor correction device 50 is mounted is not required, and the power factor compensation device 50 is mounted on the frame 80. Since there is no need for a separate coupling means 30a for fixing later, the effect of reducing the manufacturing cost and manufacturing process of the product is also generated.

In addition, the power factor correction device may be provided by only coupling the guide protrusions 71 and 73 and the coupling member 75 to the guide grooves 81 and 83 and the locking groove 85 without a separate coupling means 30a. Since 50 and the frame 80 can be combined, the effect of improving the assembly of the product is also generated.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, anyone of ordinary skill in the art without departing from the gist of the present invention claimed in the claims that various modifications can be carried out Of course, such changes are intended to fall within the scope of the claims set forth.

Claims (3)

In the mounting structure of the power factor correction apparatus comprising a housing coupled to a substrate on which a power factor correction circuit is formed, and a frame on which the housing is mounted, A plurality of guide protrusions protruding downward from the lower surface of the housing; A guide groove including a recess formed on the frame so that the guide protrusion is seated, and a guide slot formed inside the frame such that an end of the guide protrusion seated on the recess is slidably coupled; And And a support means for supporting the housing after the guide protrusion and the coupling unit are coupled to each other. The method of claim 1, wherein the guide slot, And an upper surface thereof is partitioned by a coupling piece protruding from the frame so that a lower surface thereof covers a part of an upper portion of the recess portion by a bottom surface of the recess portion. The method of claim 1, wherein the support means, A locking member protruding from the lower end of the housing, the locking member protruding from the lower surface of the housing; And a locking groove formed on the frame such that the locking protrusion is inserted and fixed when the end of the guide protrusion is inserted into the guide slot.