JP2015053376A - Housing and electric power conversion system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make work to fix a case to a cover more efficient in a housing where a packing is disposed between the case and the cover covering an opening of the case.SOLUTION: A housing includes: a case which stores an electric circuit; a cover which covers an opening of the case; a packing which is disposed so as to enclose the opening and sandwiched by the case and the cover; a leaf spring having one end fixed to one of the case and the cover and the other end where a boss is formed; and a first hook formed at the other of the case and the cover. The first hook engages with the boss thereby allowing the cover to be held by the case.

Description

  The present invention relates to a housing and a power conversion device.

Patent Document 1 describes a prevention device in which a packing is disposed between an upper case and a lower case. Patent Document 2 describes a power conditioner in which a packing is disposed between a casing and a lid.
Patent Document 1 Japanese Utility Model Laid-Open No. 2-101582 Patent Document 2 Japanese Patent Laid-Open No. 2012-16597

  In a casing in which packing is disposed between the case as described above and a cover that covers the opening of the case, it is desired to improve the efficiency of fixing the case and the cover.

  A housing according to one embodiment of the present invention contains an electric circuit, a case having an opening, a cover that covers the opening of the case, a packing that is disposed so as to surround the opening, and is sandwiched between the case and the cover And a leaf spring having one end fixed to one of the case and the cover and the other end on which the boss is formed, and a first hook formed on the other of the case and the cover, the first hook being the boss By engaging with the cover, the cover is held by the case.

  In the housing, one end of the leaf spring may be fixed to the case, and the first hook may be formed on the cover.

  The housing further includes a plate member fixed to the case and formed with a screw hole, and the cover has a through hole at a position facing the screw hole when the cover is held by the case, through the through hole. The case and the cover are fixed by inserting the screw into the screw hole, and the plate spring and the plate member may be formed from a single plate.

  The housing may further include a guide portion that guides the first hook to the boss, and the leaf spring, the plate member, and the guide portion may be formed from a single plate.

  In the housing described above, the first hook has a through hole, and when the cover is held by the case, the boss may be inserted into the through hole.

  In the housing, the leaf spring may extend along the edge of the opening of the case.

  In the housing, the leaf spring may be covered with the cover in a state where the cover is held by the case by the first hook engaging the boss.

  In the above housing, the first hook is provided on one side of the cover, the housing is provided on the case, the second hook formed on the other side facing the one side of the cover, and the second A hook receiving portion with which the hook is engaged, and after the second hook is engaged with the hook receiving portion, the boss is pushed up by the restoring force of the leaf spring after the first hook pushes down the boss. The cover may be held by the case by engaging the first hook with the boss.

  In the housing, one side surface of the cover may correspond to the bottom surface of the housing in a state where the housing is installed.

  The power converter device which concerns on 1 aspect of this invention is equipped with the said housing | casing and the power converter circuit which is accommodated in a case as an electric circuit, and converts and outputs electric power.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is a figure which shows an example of the external appearance perspective view of the power conditioner which concerns on this embodiment. It is a figure which shows an example of the external appearance perspective view of the power conditioner of the state which opened the cover. It is a figure which shows an example of the fragmentary perspective view of the case which expanded the part of the leaf | plate spring. It is a figure which shows a mode that the hook formed in the cover is guided by the boss | hub formed in the leaf | plate spring. It is a figure which shows an example of sectional drawing of a case and a cover. It is a figure which shows an example of sectional drawing to which the part shown by the code | symbol 16 of FIG. 5 was expanded. It is a figure which shows a mode that a cover is fixed to a case. It is a figure which shows a mode that a cover is fixed to a case. It is a figure which shows an example of the boss | hub and hook which concern on a modification.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows an example of an external perspective view of a power conditioner 100 according to this embodiment. The power conditioner 100 includes a case 10 and a cover 20. Case 10 accommodates an electric circuit such as an inverter that converts a DC voltage from a DC power source into an AC voltage. The cover 20 covers the opening of the case 10. The case 10 and the cover 20 constitute a housing. In addition, the electric circuit accommodated in case 10 is not limited to an inverter. Case 10 may accommodate a power conversion circuit that converts and outputs power other than the inverter. The power conversion circuit includes a converter that converts an AC voltage from an AC power source into a DC voltage, a converter that converts a first DC voltage from the DC power source into a second DC voltage different from the first DC voltage, or DC power. And a bidirectional inverter that performs bidirectional power conversion between the AC power and the AC power.

  FIG. 2 shows an example of an external perspective view of the power conditioner 100 with the cover 20 opened. The power conditioner 100 further includes a packing 30. The packing 30 is disposed so as to surround the opening of the case 10 and is sandwiched between the case 10 and the cover 20. The case 10 and the cover 20 are engaged by an engaging member on the side surface located on the upper surface in a state where the power conditioner 100 is installed on the wall surface.

  The power conditioner 100 further includes a leaf spring 40 and a hook 50. The leaf spring 40 has one end fixed to the case 10 and the other end on which the boss 42 is formed. The hook 50 is formed on the cover 20. The cover 20 is held by the case 10 by the hook 50 engaging with the boss 42. Note that one end of the leaf spring 40 may be fixed to the cover 20 and the hook 50 may be formed on the case 10.

  A screw hole 62 is formed in one side surface 12 of the case 10. The one side surface 12 is located on the bottom surface in a state where the power conditioner 100 is installed on the wall surface. Further, a through hole 22 is formed in one side surface 24 of the cover 20 at a position facing the screw hole 62 when the cover 20 is held by the case 10. The one side surface 24 is located on the bottom surface in a state where the power conditioner 100 is installed on the wall surface. The cover 20 is fixed to the case 10 by inserting the screw into the screw hole 62 through the through hole 22.

  In a state where the case 10 and the cover 20 are engaged by the engaging member on one side, the hook 50 is engaged with the boss 42 and is engaged on the other side opposite to the one side. 10 can be reliably held. Then, in a state where the cover 20 is held by the case 10, the cover 20 can be fixed to the case 10 by inserting a screw into the screw hole 62 through the through hole 22.

  Here, when there is no mechanism for holding the cover 20 to the case 10 by engaging the hook 50 with the boss 42, the operator engages the case 10 and the cover 20 on one side with an engaging member, for example. In the combined state, the cover 20 is fixed to the case 10 while pressing the packing 30 with the cover 20. The operation while pressing the packing 30 with the cover 20 may reduce the efficiency of the assembly operation of the case 10. Therefore, by engaging the hook 50 with the boss 42 and holding the cover 20 on the case 10, it is possible to improve the efficiency of the work of fixing the cover 20 to the case 10.

  FIG. 3 shows an example of a partial perspective view of the case 10 in which the portion of the leaf spring 40 is enlarged. A plate member 60 in which a screw hole 62 is formed is fixed to the case 10 on one side surface 12 of the case 10. The plate spring 40 and the plate member 60 are formed from a single plate. Further, a guide portion 70 is formed on one side surface 12 of the case 10. The guide part 70 guides the hook 50 formed on the cover 20 to the boss 42 formed on the other end of the leaf spring 40. The guide portion 70 is formed from a single plate together with the plate spring 40 and the plate member 60. The leaf spring 40 extends along the edge of the opening of the case 10.

  FIG. 4 is a diagram illustrating a state in which the hook 50 formed on the cover 20 is guided to the boss 42 formed on the leaf spring 40. When the cover 20 is disposed so as to cover the opening of the case 10, the hook 50 is guided to the boss 42 by the guide portion 70, and the hook 50 pushes down the boss 42. When the hook 50 is further pushed in, the boss 42 is pushed up by the restoring force of the leaf spring 40, and the hook 50 is engaged with the boss 42. When the hook 50 is engaged with the boss 42, the through hole 22 formed in the cover 20 is disposed at a position facing the screw hole 62.

  FIG. 5 shows an example of a cross-sectional view of the case 10 and the cover 20. FIG. 6 shows an example of an enlarged cross-sectional view of a portion indicated by reference numeral 16 in FIG.

  The power conditioner 100 further includes a hook 80 and a hook receiving portion 90 as an engaging member for engaging one side of the case 10 and the cover 20. The hook 80 is formed on the other side surface 14 facing the one side surface 12 of the cover 20. The hook receiving portion 90 is engaged with the hook 80. The operator engages the hook 50 with the boss 42 after the hook 80 is engaged with the hook receiving portion 90. Thereby, the cover 20 can be held in the case 10 while the packing 30 is crushed by the back surface of the cover 20.

  7 and 8 are diagrams showing how the cover 20 is fixed to the case 10. First, the operator engages the hook 80 with the hook receiving portion 90 as shown in FIG. Next, as shown in FIG. 8, the operator pushes down the cover 20 so that the cover 20 covers the opening of the case 10.

  When the cover 20 is pushed down, the hook 50 formed on the cover 20 is guided to the boss 42 by the guide portion 70. Then, after the hook 50 pushes down the boss 42, the boss 42 is pushed up by the restoring force of the leaf spring 40, and the hook 50 engages with the boss 42. Thereby, the cover 20 is held by the case 10. Thereafter, the cover 20 is fixed to the case 10 by inserting the screw 64 into the screw hole 62 through the through hole 22.

  Here, when the leaf spring 40 is extended in a direction perpendicular to the edge of the opening of the case 10, the leaf spring 40 can be extended only by the thickness of the case 10. In this case, it is difficult to extend the leaf spring 40 longer than when extending along the edge of the opening of the case 10. In addition, since other members such as terminals are exposed in the case 10, there is a restriction in extending the edge (side wall) of the cover 20. Therefore, when the leaf spring 40 is extended in a direction perpendicular to the edge of the opening of the case 10, it is difficult to cover the leaf spring 40 with the cover 20. On the other hand, by extending the leaf spring 40 along the edge of the opening of the case 10, the length of the leaf spring 40 in the short (width) direction can be shortened, and the leaf spring 40 can be easily covered with the cover 20. . Further, by extending the leaf spring 40 along the edge of the opening of the case 10, the longitudinal (length) direction of the leaf spring 40 can be easily adjusted. Thereby, the intensity | strength of the leaf | plate spring 40 can be adjusted easily.

  FIG. 9 is a diagram illustrating an example of the boss 42 and the hook 50 according to the modification. The hook 50 may have a through hole 52 into which the boss 42 is inserted. When the cover 20 is held by the case 10, the boss 42 is inserted into the through hole 52. Thereby, the cover 20 can be reliably arrange | positioned by the predetermined position. Further, the cover 20 can be made difficult to shift with respect to the case 10.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 10 Case 20 Cover 22 Through-hole 30 Packing 42 Boss 50 Hook 52 Through-hole 60 Plate member 62 Screw hole 64 Screw 70 Guide part 80 Hook 90 Hook receiving part 100 Power conditioner

Claims (10)

A case containing an electrical circuit and having an opening;
A cover covering the opening of the case;
A packing disposed so as to surround the opening, and sandwiched between the case and the cover;
A leaf spring having one end fixed to one of the case or the cover and the other end formed with a boss;
A first hook formed on the other of the case or the cover,
A housing in which the cover is held by the case by the first hook engaging with the boss. The one end of the leaf spring is fixed to the case;
The housing according to claim 1, wherein the first hook is formed on the cover. A plate member fixed to the case and formed with screw holes;
The cover has a through hole at a position facing the screw hole when held by the case;
The case and the cover are fixed by inserting a screw into the screw hole through the through hole,
The housing according to claim 2, wherein the plate spring and the plate member are formed from a single plate. A guide portion for guiding the first hook to the boss;
The housing according to claim 3, wherein the plate spring, the plate member, and the guide portion are formed from the single plate. The first hook has a through hole;
The housing according to claim 3 or 4, wherein the boss is inserted into the through hole when the cover is held by the case.   The case according to claim 2, wherein the leaf spring extends along an edge of the opening of the case.   The said leaf | plate spring is covered with the said cover in the state by which the said cover was hold | maintained by the said case by the said 1st hook engaging with the said boss | hub. The case described in one. The first hook is provided on one side of the cover,
The housing is
A second hook formed on the other side facing the one side of the cover;
A hook receiver provided on the case and engaged with the second hook;
After the second hook is engaged with the hook receiving portion, the first hook pushes down the boss, and then the boss is pushed up by the restoring force of the leaf spring, so that the first hook The housing according to claim 2, wherein the cover is held by the case by engaging with the boss.   The housing according to claim 8, wherein the one side surface of the cover corresponds to a bottom surface of the housing in a state where the housing is installed. The housing according to any one of claims 1 to 9,
A power conversion device comprising: a power conversion circuit that is housed in the case as the electric circuit and converts and outputs power.

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