Power conversion device

Abstract

To provide a power conversion device capable of suppressing looseness and damages of an optional member due to a vibration.SOLUTION: A power conversion device comprises: an inverter part 10 for supplying power to a load; an optional member 20 that applies an additional function to the inverter part 10 and is fixed to the inverter part 10; and a fixing clip 1 that is provided separately from the inverter part 10 and the optional member 20, and fixes the inverter part 10 and the optional member 20. In the optional member 20, a snap fit 25 is provided to a front surface in a X direction. In the inverter part 10, the snap fit 25 is attached to a surface that is parallel to the surface in the X direction of the optional member 20; a first fixing part is fixed to a surface in a Z direction orthogonal to the surface in the X direction of the optional member 20; and thus, it is fixed to the optional member 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a power conversion device, and more particularly to a power conversion device including an inverter with an optional member. [Background technology]

[0002] Conventionally, in a power conversion device using an inverter that supplies power to a load, a power conversion device equipped with an optional member that can add a desired optional function according to the load and use to be applied is known (for example, see Patent Document 1). Patent Document 1 discloses a configuration for attaching an optional circuit board (optional member) for the purpose of increasing signals. The inverter device described in Patent Document 1 attaches and fixes the optional member to the inverter by inserting an engagement portion of the optional member into an opening provided in the inverter and engaging it through elastic deformation. In addition, the power conversion device described in Patent Document 1 is provided with an L-shaped engagement claw portion on the optional member, which is hooked on the lower front surface of the inverter housing to prevent the optional member from falling off. In addition, in Patent Document 1, both the engagement portion and the engagement claw portion of the optional member used to fix the inverter and the optional member are provided on the same surface of the optional member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-28893 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned Patent Document 1, both the engagement portion and the engagement claw portion of the optional member used to fix the inverter and the optional member are provided on the same surface of the optional member, and therefore the strength of the fixation is considered to be weak depending on the direction of the force applied. Due to the weak fixation strength, when the inverter device and the optional member vibrate individually due to the operation of the inverter device, the fixation of the optional member is easily released or a part of the optional member is easily damaged. Therefore, there is a demand for a power conversion device that can suppress the loosening and damage of the optional member (functional addition member) due to vibration even when the inverter is operated.

[0005] The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a power conversion device that can suppress loosening and damage of optional components (functionality-adding components) due to vibration. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a power conversion device according to one aspect of the present invention comprises an inverter section for supplying power to a load, an optional member fixed to the inverter section and giving the inverter section additional functions, and a first fixing section provided separately from the inverter section and the optional member and fixing the inverter section to the optional member, wherein the optional member has a second fixing section provided on a side surface, and the inverter section is fixed to the optional member by attaching the second fixing section to a surface parallel to the side surface of the optional member and the first fixing section to a surface perpendicular to the side surface of the optional member.

[0007] As described above, the power conversion device according to one aspect of the present invention includes a first fixing part that is provided separately from the inverter unit and the optional member and fixes the inverter unit and the optional member, and the optional member has a second fixing part provided on a side surface thereof, and the inverter unit is fixed to the optional member by attaching the second fixing part to a surface parallel to the side surface of the optional member and the first fixing part to a surface perpendicular to the side surface of the optional member. As a result, the optional member and the inverter unit are fixed by the second fixing part and the first fixing part on the two perpendicular surfaces. Therefore, the optional member and the inverter unit can be fixed more firmly than when the inverter unit and the optional member are fixed only on the same surface. As a result, loosening and damage of the optional member (functional member) due to vibration can be suppressed. In addition, since the first fixing part is provided separately from the inverter unit and the optional member, it is easy to replace the first fixing part when it is damaged.

[0008] In the power conversion device according to the above aspect, the first fixing portion is preferably arranged to straddle the inverter unit and the optional member, and configured to fix the inverter unit and the optional member by abutting against both the inverter unit and the optional member. With this configuration, since the first fixing portion is arranged to straddle the inverter unit and the optional member, it is possible to easily fix the inverter unit and the optional member.

[0009] In this case, the first fixing portion preferably includes an engagement fixing portion and an engagement abutment portion, and is configured so that the engagement fixing portion engages with one of the inverter portion and the optional member, and the engagement abutment portion abuts the other of the inverter portion or the optional member, thereby fixing the inverter portion and the optional member. With this configuration, one of the inverter portion and the optional member is provided with a portion with which the engagement fixing portion engages, but the other only needs to be abutted by the engagement abutment portion, so that the structure of the inverter portion or the optional member can be simplified compared to a case in which an engagement portion is provided on both the inverter portion and the optional member. As a result, the inverter portion and the optional member can be fixed using an inverter portion or optional member with a simple structure.

[0010] In the power converter including the first fixing portion and the engaging and abutting portion, the first fixing portion preferably includes a flat plate portion as the engaging and abutting portion, and is configured to fix the inverter portion and the optional member by sandwiching both the inverter portion and the optional member between the flat plate portion and the engaging and abutting portion. With this configuration, the flat plate portion comes into surface contact with the inverter portion or the optional member through a large contact area, so that the inverter portion and the optional member are stably fixed. As a result, the inverter portion and the optional member can be more firmly fixed.

[0011] In this case, preferably, the first fixing part further includes a pressing part which, when pressed, moves the engaging and fixing part in a direction to release the engagement between the engaging and fixing part of the first fixing part and the inverter part or the optional part, thereby releasing the fixing of the inverter part and the optional part. With this configuration, the engagement between the engaging and fixing part of the first fixing part and the inverter part or the optional part is easily released by an operator pressing the pressing part of the first fixing part. As a result, the fixing of the inverter part and the optional part can be easily released.

[0012] In the power converter in which the first fixing portion includes an engagement fixing portion and an engagement abutment portion, preferably, the first fixing portion includes a press-fit portion as the engagement abutment portion, the inverter portion includes a hole portion into which the first fixing portion is press-fitted, and the press-fit portion of the first fixing portion is press-fitted into and abuts against the hole portion of the inverter portion, thereby fixing the inverter portion and the optional member. With this configuration, the engagement abutment portion of the first fixing portion is pressed in and is less likely to come out of the hole portion of the inverter portion. As a result, the inverter portion and the optional member can be fixed even more firmly.

[0013] In this case, preferably, the press-fit portion of the first fixing portion is cylindrical, the optional member includes an engagement receiving portion, and the first fixing portion is configured to fix the inverter portion and the optional member by engaging the engagement receiving portion of the optional member with the cylindrical press-fit portion of the first fixing portion press-fitted into the hole of the inverter portion when the cylindrical press-fit portion of the first fixing portion rotates. With this configuration, the engagement receiving portion and the engagement receiving portion engage with each other when the press-fit portion of the first fixing portion rotates, making it difficult for the engagement state to be released. As a result, the fixed state between the inverter portion and the optional member can be made less likely to loosen.

[0014] In the power converter, the press-fit portion of the first fixing portion is preferably configured to have a notch along the direction in which the press-fit portion extends, and to be pressed into the hole of the inverter portion in a state in which the press-fit portion is bent and deformed toward the center of the circle of the cylindrical press-fit portion by the notch when the press-fit portion is pressed into the hole of the inverter portion. With this configuration, the cylindrical press-fit portion is easily bent and deformed toward the center of the circle by the notch, and has a role of a so-called leaf spring that has a biasing force that tries to return to its original shape in the bent state. As a result, the press-fit portion can be easily inserted into the hole, and the biasing force of the press-fit portion can further strengthen the fixation between the inverter portion and the optional member. Effect of the Invention

[0015] According to the present invention, it is possible to provide a power conversion device capable of suppressing loosening and damage of optional members due to vibration. [Brief description of the drawings]

[0016] [Figure 1] 1 is a diagram showing a power conversion device according to a first embodiment of the present invention. [Diagram 2] 4 is a diagram showing the positions of a fixing clip and a second fixing portion in the power conversion device according to the first embodiment of the present invention. FIG. [Diagram 3] FIG. 2 is a diagram showing a state in which an inverter unit and an optional member are fixed by using a fixing clip in the power conversion device according to the first embodiment of the present invention. [Figure 4] 3A and 3B are diagrams showing a fixing clip in the power converter according to the first embodiment of the present invention. [Diagram 5] 3A to 3C are diagrams showing the shape of a snap fit in the power converter according to the first embodiment of the present invention. [Figure 6] 3 is a diagram showing a state before an inverter unit and an optional member are fixed by using a fixing clip in the power conversion device according to the first embodiment of the present invention. FIG. [Figure 7] FIG. 4 is a view showing a state in the middle of fixing an inverter unit and an optional member by using fixing clips in the power conversion device according to the first embodiment of the present invention. [Figure 8] 3 is a diagram showing a state in which an inverter unit and an optional member are fixed by using a fixing clip in the power conversion device according to the first embodiment of the present invention. FIG. [Figure 9] FIG. 10 is a diagram showing positions of holes provided in an inverter section in a power conversion device according to a second embodiment of the present invention. [Figure 10] 13 is a diagram showing the positions of engagement / fixture receivers provided on an optional member in a power converter according to a second embodiment of the present invention. FIG. [Figure 11] 13 is an enlarged view of an engagement / fixture receiver provided on an optional member in a power converter according to a second embodiment of the present invention. FIG. [Figure 12] FIG. 11 is a view showing a press-fit spacer in a power converter according to a second embodiment of the present invention. [Figure 13] 13 is a diagram showing a press-fit spacer in a power converter according to a second embodiment of the present invention, viewed from the lateral direction. FIG. [Figure 14] FIG. 11 is a diagram showing a state of a press-fit spacer before an inverter unit and an optional member are fixed in a power converter according to a second embodiment of the present invention. [Figure 15] FIG. 10 is a diagram showing the positional relationship between a press-fit spacer and a fixing pin before the inverter unit and the optional member are fixed in place in the power conversion device according to the second embodiment of the present invention. [Figure 16] FIG. 11 is a diagram showing a state of a press-fit spacer in a state where an inverter unit and an optional member are fixed in place in a power converter according to a second embodiment of the present invention. [Figure 17] 13 is a diagram showing the positional relationship between a press-fit spacer and a fixing pin in a state in which an inverter unit and an optional member are fixed in place in a power conversion device according to a second embodiment of the present invention. FIG. [Figure 18] 13 is a cross-sectional view of a press-fit spacer and a hole in a state in which an inverter section and an optional member are fixed in a power converter according to a second embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0018] [First embodiment] The configuration of a power conversion device 100 according to a first embodiment will be described with reference to FIG.

[0019] (Configuration of power conversion device 100) As shown in FIG. 1, the power conversion device 100 according to the first embodiment includes an inverter unit 10 for supplying power to a load, a mounting unit 30 that is attached to the inverter unit 10 and is used to mount the inverter unit 10 on an arbitrary mounting surface S, and an optional member 20 that is attached to the inverter unit 10 and provides the inverter unit 10 with an additional function. In this first embodiment, the direction parallel to the mounting surface S is defined as the X direction, the direction perpendicular to the mounting surface S and the X direction is defined as the Y direction, and the direction perpendicular to both the X direction and the Y direction and parallel to the mounting surface S is defined as the Z direction. In addition, in the power conversion device 100, the direction away from the mounting surface S is defined as the Y1 direction, the direction approaching the mounting surface S is defined as the Y2 direction, the left direction viewed from the Y1 direction is defined as the X1 direction, the right direction is defined as the X2 direction, the upper side viewed from the Y1 direction is defined as the Z1 direction, and the lower side is defined as the Z2 direction.

[0020] The inverter unit 10 is an inverter for supplying power to a load (not shown). Specifically, when AC power is input, the inverter unit 10 performs power conversion using a power conversion circuit (not shown) included therein, thereby supplying a desired power to the load. The inverter unit 10 also includes a control unit (not shown) for controlling the power conversion circuit. The control unit is, for example, a microcomputer, and is mounted on a PCB board, for example. The control unit includes a CPU (Central Processing Unit) as a processor, a ROM (Read Only Memory), and a RAM (Random Access Memory), etc.

[0021] The mounting unit 30 is attached to the inverter unit 10 and is a member for mounting the power conversion device 100 including the inverter unit 10 and the optional member 20 on an installation surface S. The mounting unit 30 is mounted on the installation surface S by screw fastening. In the first embodiment, the mounting unit 30 also functions as a heat dissipation fin having a structure that increases the surface area so as to efficiently dissipate heat generated from the inverter unit 10.

[0022] In the first embodiment, the power conversion device 100 includes a fixing clip 1 provided separately from the inverter unit 10, the optional member 20, and the installation unit 30, as shown in Fig. 2. The fixing clip 1 is a member for fixing the inverter unit 10 and the optional member 20 together, and is provided on the Z2 direction side of the inverter unit 10 and the optional member 20. In this first embodiment, the fixing clip 1 abuts against both the inverter unit 10 and the optional member 20, as shown in Fig. 3. The fixing clip 1 is an example of a "first fixing portion" in the claims.

[0023] The fixing clip 1 is for fixing the inverter section 10 and the optional member 20. The fixing clip 1 is formed as a single piece by resin molding using a resin such as PPS (Polyphenylenesulfide). The fixing clip 1 has elasticity such that it is slightly deformed when an operator applies force to it using a finger or a tool. As shown in FIG. 4, the fixing clip 1 includes an engaging and fixing portion 1a, a flat portion 1b, and a pressing portion 1c. In this first embodiment, the pressing portion 1c is provided with a knob portion 1d. The flat portion 1b is an example of an "engaging and abutting portion" in the claims.

[0024] The optional member 20 has a program for modifying the control operation of the inverter unit 10, and when attached to the inverter unit 10, modifies the operation program of a control unit (not shown) included in the inverter unit 10. The optional member 20 includes, for example, an option board on which a program for realizing a function desired by a customer is stored. Also, as shown in Fig. 5, the optional member 20 is provided on its Z2 direction side with a snap fit 21 that mechanically engages with another member by being hooked into a recess or an opening.

[0025] The option member 20 is also composed of a connection section 24 to which the operation display section 22 is attached and a storage section 23. The operation display section 22 is operated by an operator to adjust the power supplied from the inverter section 10 to the load, and displays information on the input state setting that has been operated, the power being supplied, and the like. The operation display section 22 has a snap fit on the YZ plane, and the snap fit engages with and is fixed to an opening provided on the YZ plane of the connection section 24. The storage section 23 is composed of a cover 23a and a housing section 23b, and stores an option board and wiring. The connection section 24 has the operation display section 22 attached thereto as described above, and is also attached to the inverter section 10. The connection section 24 has a snap fit 25 on the YZ plane for engaging with the inverter section 10. The snap fit 25 is an example of a "second fixing section" in the claims.

[0026] (Method of fixing and releasing the inverter unit 10 and optional member 20) Next, a method of fixing the inverter section 10 and the optional member 20 using the fixing clip 1 according to the first embodiment and a method of releasing the fixed state will be described with reference to Figs. 2 and 6 to 8.

[0027] As shown in Fig. 2, the snap fit 25 engages with the opening 11 of the inverter unit 10 to fix the inverter unit 10 and the optional member 20 together. Although not shown in Fig. 2, a similar configuration is also provided on the side surface on the X1 direction side, and the same fixing is performed. In this first embodiment, a procedure for attaching the fixing clip 1 to the inverter unit 10 and the optional member 20 in a state in which the snap fit 25 of the optional member 20 engages with the opening 11 of the inverter unit 10 to fix the inverter unit 10 and the optional member 20 together will be described.

[0028] 6 to 8 are enlarged views of the Z2 direction end portions of the inverter unit 10 and the optional member 20, viewed from the X1 direction. As shown in Fig. 6, the snap fit 21 of the optional member 20 has a stepped portion 21a and a flat portion 21b. In this first embodiment, the step height d2 of the stepped portion 21a is equal to the step height d1 of the engaging fixing portion 1a of the fixing clip 1.

[0029] Here, when attaching the fixing clip 1 to the inverter unit 10 and the optional component 20, first, as shown in Figure 6, the surface of the flat portion 1b of the fixing clip 1 is abutted against the inner surface 10b of the case 10a, which is the wall portion of the housing of the inverter unit 10.

[0030] 7, the fixing clip 1 is moved in the Z1 direction. At this time, since the lower end face (the face on the Y2 direction side) of the engaging and fixing portion 1a of the fixing clip 1 is lower than the upper end face (the face on the Y1 direction side) of the step portion 21a of the snap fit 21, the engaging and fixing portion 1a is elastically deformed so as to be lifted in the Y1 direction. As a result, the fixing clip 1 moves in the Z1 direction while the engaging and fixing portion 1a abuts against the snap fit 21.

[0031] 8, the movement of the fixing clip 1 is completed, and the engaging and fixing portion 1a of the fixing clip 1 engages with the step portion 21a of the snap fit 21. The fixing clip 1 is also disposed so that the snap fit 21 of the optional member 20 and the case 10a of the inverter unit 10 are sandwiched between the flat portion 1b and the engaging and fixing portion 1a of the fixing clip 1. As a result, the inverter unit 10 and the optional member 20 are fixed to each other.

[0032] Next, a method of releasing the fixed state in which the inverter unit 10 and the optional member 20 are fixed by the fixing clip 1 as shown in FIG. 8 will be described. In the state of FIG. 8, an operator holds the knob 1d and applies a force to the pressing portion 1c in the Y2 direction of FIG. 8, so that the pressing portion 1c is bent in the Y2 direction and the engaging and fixing portion 1a is lifted in the Y1 direction. This releases the engagement between the engaging and fixing portion 1a of the fixing clip 1 and the step portion 21a of the snap fit 21. Then, in a state in which the engagement between the engaging and fixing portion 1a of the fixing clip 1 and the step portion 21a of the snap fit 21 is released, the operator holds the knob 1d and pulls the fixing clip 1 in a direction (Z2 direction) away from the inverter unit 10 and the optional member 20. This releases the fixed state of the inverter unit 10 and the optional member 20.

[0033] (Effects of the first embodiment) Next, the effects of the first embodiment will be described.

[0034] The power conversion device 100 of the first embodiment includes an inverter section 10 for supplying power to a load, an optional member 20 fixed to the inverter section 10 and providing an additional function to the inverter section 10, and a fixing clip 1 provided separately from the inverter section 10 and the optional member 20 for fixing the inverter section 10 and the optional member 20. The optional member 20 is provided with a snap fit 25 on a surface in the X direction, and the inverter section 10 is fixed to the optional member 20 by attaching the snap fit 25 to a surface parallel to the X direction surface of the optional member 20 and attaching the fixing clip 1 to a surface in the Z direction perpendicular to the X direction surface of the optional member 20. As a result, the optional member 20 and the inverter section 10 are fixed to each other by the snap fit 25 and the fixing clip 1 on two perpendicular surfaces. Therefore, the optional member 20 and the inverter section 10 can be fixed to each other more firmly than when the inverter section 10 and the optional member 20 are fixed only on the same surface. As a result, it is possible to prevent the optional member 20 (functional member) from loosening or being damaged due to vibration. In addition, since the fixing clip 1 is provided separately from the inverter section 10 and the optional member 20, when the fixing clip 1 is damaged, it can be easily replaced.

[0035] In the first embodiment, the fixing clip 1 is arranged so as to straddle the inverter section 10 and the optional member 20, and is configured to fix the inverter section 10 and the optional member 20 by abutting against both the inverter section 10 and the optional member 20. With this configuration, the fixing clip 1 is arranged so as to straddle the inverter section 10 and the optional member 20, so that the inverter section 10 and the optional member 20 can be easily fixed together.

[0036] In the first embodiment, the fixing clip 1 includes an engagement fixing portion 1a and a flat plate portion 1b, and is configured so that the engagement fixing portion 1a engages with one of the inverter portion 10 and the optional member 20, and the flat plate portion 1b abuts against the other of the inverter portion 10 or the optional member 20, thereby fixing the inverter portion 10 and the optional member 20. With this configuration, one of the inverter portion 10 and the optional member 20 is provided with a portion with which the engagement fixing portion 1a engages, but the other only needs to be abutted by the engagement abutment portion, so that the structure of the inverter portion 10 or the optional member 20 can be simplified compared to a case in which an engagement portion is provided on both the inverter portion 10 and the optional member 20. As a result, the inverter portion 10 and the optional member 20 can be fixed using the inverter portion 10 or the optional member 20 with a simple structure.

[0037] In the first embodiment, the fixing clip 1 includes a flat plate portion 1b, and is configured to fix the inverter portion 10 and the optional member 20 by sandwiching both the inverter portion 10 and the optional member 20 between the flat plate portion 1b and the engaging fixing portion 1a. With this configuration, the flat plate portion 1b comes into surface contact with the inverter portion 10 or the optional member 20 through a large contact area, so that the inverter portion 10 and the optional member 20 are stably fixed. As a result, the inverter portion 10 and the optional member 20 can be fixed more firmly.

[0038] Moreover, in the first embodiment, the fixing clip 1 further includes a pressing portion 1c that, when pressed, moves the engaging and fixing portion 1a of the fixing clip 1 in a direction to release the engagement between the inverter portion 10 or the optional member 20, thereby releasing the fixation between the inverter portion 10 and the optional member 20. With this configuration, the engagement between the engaging and fixing portion 1a of the fixing clip 1 and the inverter portion 10 or the optional member 20 is easily released by an operator pressing the pressing portion 1c of the fixing clip 1. As a result, the fixation between the inverter portion 10 and the optional member 20 can be easily released.

[0039] [Second embodiment] Next, a power conversion device 200 according to the second embodiment will be described. The power conversion device 200 according to the second embodiment includes an inverter unit 110, an optional member 120, and a mounting unit 30, as shown in FIG. 1. Unlike the inverter unit 10 of the first embodiment, the inverter unit 110 of the second embodiment is provided with a hole 111 as shown in FIG. 9. The hole 111 has a tapered shape in which the diameter becomes smaller as it extends from the opening end of the surface of the inverter unit 110 close to the optional member 20 in the direction away from the optional member 20 (Y2 direction). The maximum diameter (diameter of the opening end) of the hole 111 is φ1. Also, unlike the optional member 20 of the first embodiment, the optional member 120 of the second embodiment is provided with an engagement fixing receiving portion 121 and a fixing pin 122, as shown in FIG. 10.

[0040] As shown in Fig. 11, the engaging and fixing receiving portion 121 of the optional member 120 is a circular hole with notches 121a provided at four locations on the circumference. The engaging and fixing receiving portion 121 is provided with a locking mechanism 121b on the inside of the hole. This locking mechanism 121b is provided to perform a locking operation of the press-fit spacer 2, which will be described later. As shown in Fig. 9, the hole 111 of the inverter unit 110 and the engaging and fixing receiving portion 121 of the optional member 120 are arranged coaxially.

[0041] The power conversion device 200 also includes a press-fit spacer 2 provided separately from the inverter unit 110, the optional member 120, and the installation unit 30. The press-fit spacer 2 is an example of the "first fixing portion" in the claims. In the second embodiment, the points common to the first embodiment will not be described.

[0042] The press-fit spacer 2 will be described with reference to Figs. 12 and 13. As shown in Fig. 12, the press-fit spacer 2 is formed by a lid portion 2a and a press-fit portion 2b. The lid portion 2a is a disk-shaped member having a diameter of φ2, and a protruding portion 2c is provided on a part of the circumference of the circle. In addition, the protruding portion 2c is provided with a recess 2d that abuts against a fixing pin 122. The protruding portion 2c and the recess 2d provided in the protruding portion 2c are provided for performing a locking operation of the press-fit spacer 2, which will be described later. In addition, in this second embodiment, a groove portion 2e is provided on the surface of the lid portion 2a. The groove portion 2e is provided so that an operator can easily insert a jig such as a flat-head screwdriver in order to easily perform a rotation operation of the press-fit spacer 2, which will be described later.

[0043] As shown in FIG. 13, the press-fit portion 2b has a cylindrical shape and is provided with four notches 2f along the extending direction of the cylinder. The press-fit portion 2b of the press-fit spacer 2 can bend so as to contract inward or expand outward due to the provision of the notches 2f. The press-fit portion 2b has a function as a so-called leaf spring, which generates a biasing force that expands outward when contracted inward. The shape of the press-fit portion 2b is tapered such that the diameter φ4 of the circle on the opposite side to the lid portion 2a side is smaller than the diameter φ3 of the circle on the lid portion 2a side. The diameters φ3 and φ4 of the press-fit portion 2b are smaller than the diameter φ2 of the lid portion 2a.

[0044] The press-fit portion 2b also includes an engagement fixing portion 2g. The engagement fixing portion 2g includes a step immediately above the notch portion 2f of the press-fit portion 2b, the step being perpendicular to the cylindrical extension direction of the press-fit portion 2b. In the second embodiment, the diameter φ1 of the circle at the upper end of the opening of the hole 111 of the inverter portion 110 shown in FIG. 9 is the same as the diameter φ3 of the circle at the press-fit portion 2b of the press-fit spacer 2.

[0045] (Method of fixing inverter unit 10 and optional member 20) 14 to 18, a method for fixing the inverter section 10 and the optional member 20 using the press-fit spacer 2 according to the second embodiment will be described. As in the first embodiment, in the second embodiment, a procedure for attaching the press-fit spacer 2 to the inverter section 10 and the optional member 20 in a state in which the snap fit 25 of the optional member 20 and the opening 11 of the inverter section 10 are engaged and the inverter section 10 and the optional member 20 are fixed will be described.

[0046] FIG. 14 shows the optional member 120 with the cover 23a of the accommodation portion 123 of the optional member 120 removed. As shown in FIG. 14, the optional member 120 is fixed in the Y1 direction of the inverter unit 10. At this time, the press-in portion 2b of the press-in spacer 2 is inserted from the Y1 direction toward the Y2 direction into the engagement fixing receiving portion 121 provided in the housing portion 123b of the optional member 120 and the hole portion 111 provided in the inverter unit 110. At this time, the press-in portion 2b of the press-in spacer 2 is inserted so that the notch portion 121a of the engagement fixing receiving portion 121 in the optional member 120 and the engagement fixing portion 2g in the press-in spacer 2 overlap with each other as viewed from the Y1 direction. At this time, the amount of pressing is adjusted so that the cover portion 2a of the press-in spacer 2 is positioned higher than the upper end of the fixing pin 122 on the Y1 direction side. In this case, when viewed from the Y1 direction, if the cutout portion 121a of the engagement fixing receiving portion 121 in the optional member 120 and the engagement fixing portion 2g in the press-fit spacer 2 are positioned so as to overlap, the convex portion 2c and the recess 2d do not abut against the fixing pin 122, as shown in Figure 15.

[0047] Next, as shown in FIG. 16, the press-fit spacer 2 is fixed. Specifically, from the state shown in FIG. 14 and FIG. 15 in which the press-fit portion 2b of the press-fit spacer 2 is inserted into the engagement fixing receiving portion 121 provided in the housing portion 123b of the optional member 120 and the hole portion 111 provided in the inverter portion 110, the press-fit spacer 2 is rotated clockwise as viewed from the Y1 direction. As a result, as shown in FIG. 17, the convex portion 2c of the cover portion 2a of the press-fit spacer 2 is disposed on the left side (X1 direction side) as viewed from the Y1 direction with respect to the fixing pin 122. At this time, the engagement fixing portion 2g of the press-fit spacer 2 engages with the lock mechanism 121b of the optional member 120 as shown in the cross-sectional view of FIG. 18. As a result, the press-fit spacer 2 is restricted from moving in the Y direction, and thus the press-fit spacer 2 is restricted from coming off. Moreover, in a state in which the engagement fixing portion 2g of the press-fit spacer 2 is engaged with the lock mechanism 121b of the optional member 120, by further pushing the press-fit spacer 2 in the Y2 direction, the recess 2d of the cover portion 2a of the press-fit spacer 2 comes into contact with the fixing pin 122, as shown in Fig. 16. This prevents the press-fit spacer 2 from rotating, further preventing the press-fit spacer 2 from coming off.

[0048] (Effects of the second embodiment) Next, the effects of the second embodiment will be described.

[0049] In the power converter 200 of the second embodiment, the press-fit spacer 2 includes a press-fit portion 2b as an engaging abutment portion, the inverter section 110 includes a hole portion 111 into which the press-fit portion 2b of the press-fit spacer 2 is press-fitted, and the press-fit portion 2b of the press-fit spacer 2 is press-fitted into and abuts against the hole portion 111 of the inverter section 110, thereby fixing the inverter section 110 and the optional member 120. With this configuration, the press-fit portion 2b of the press-fit spacer 2 is pressed in and becomes less likely to come out of the hole portion 111 of the inverter section 110. As a result, the inverter section 110 and the optional member 120 can be fixed even more firmly.

[0050] In the power converter 200 of the second embodiment, the press-fit portion 2b of the press-fit spacer 2 is cylindrical, the optional member 120 includes an engagement fixing receiving portion 121, and the press-fit spacer 2 is configured to fix the inverter unit 110 and the optional member 120 by engaging the engagement fixing portion 2g of the press-fit spacer 2 with the engagement fixing receiving portion 121 of the optional member 120 when the cylindrical press-fit portion 2b of the press-fit spacer 2 pressed into the hole portion 111 of the inverter unit 110 is rotated. With this configuration, the engagement fixing portion 2g and the engagement fixing receiving portion 121 are engaged with each other when the press-fit portion 2b of the press-fit spacer 2 is rotated, so that the engagement state is less likely to be released. As a result, the fixed state between the inverter unit 110 and the optional member 120 can be made less likely to loosen.

[0051] In the power converter 200 of the second embodiment, the press-in portion 2b of the press-in spacer 2 is provided with a notch 2f along the direction in which the press-in portion 2b extends, and is configured so that when the press-in portion 2b is press-fitted into the hole 111 of the inverter unit 110, the press-in portion 2b is pressed in a state in which the press-in portion 2b is bent and deformed toward the center of the circle by the notch 2f. With this configuration, the cylindrical press-in portion 2b is easily bent and deformed toward the center of the circle by the notch 2f, and has a role of a so-called leaf spring that has a biasing force that tries to return to its original shape in the bent state. As a result, the press-in portion 2b is easily inserted into the hole 111, and the biasing force of the press-in portion 2b can further strengthen the fixation between the inverter unit 110 and the optional member 120.

[0052] Other effects of the second embodiment are similar to those of the first embodiment.

[0053] [Variations] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications (variations) within the meaning and scope of the claims.

[0054] For example, in the above first and second embodiments, the fixing clip 1 or the press-fit spacer 2, which is the first fixing part, fixes the XZ plane, and the snap fit 25, which is the second fixing part, fixes the YZ plane, but the present invention is not limited to this. In the present invention, as long as the first fixing part and the second fixing part are configured to be fixed on different orthogonal surfaces, any combination of surfaces may be used for fixing. In addition, the fixing positions and the number of fixing points may be adjusted arbitrarily.

[0055] In the above first and second embodiments, the optional member 20 is configured by combining three parts, the operation display unit 22, the storage unit 23, and the connection unit 24, but the present invention is not limited to this. In the present invention, the optional member 20 may be configured by a single part.

[0056] In the above first and second embodiments, the second fixing portion is the snap fit 25 and is fixed to the opening 11 of the inverter unit 10, but the present invention is not limited to this. In the present invention, the second fixing portion may be another part such as a press-fit spacer.

[0057] In the above first and second embodiments, an example has been shown in which the fixing clip 1 or the press-fit spacer 2 serving as the first fixing portion engages with the optional member 20 and comes into contact with the inverter portion 10 to fix the inverter portion 10 and the optional member 20 together, but the present invention is not limited to this. In the present invention, the fixing clip 1 or the press-fit spacer 2 serving as the first fixing portion may be configured to turn right with the optional member 20 and engage with the inverter portion 10 to fix the inverter portion 10 and the optional member 20 together.

[0058] In the above first embodiment, the fixing clip 1 has a flat plate portion 1b, and the flat plate portion 1b abuts (makes surface contact with) the inner side surface 10b of the case 10a of the inverter section 10, but the present invention is not limited to this. In the present invention, the fixing clip 1 may have a non-flat abutment portion, and the abutment portion may abut (make line contact, point contact) with the inner side surface 10b of the case 10a of the inverter section 10.

[0059] In the first embodiment, the fixing clip 1 is provided with the knob 1d, but the present invention is not limited to this. In the present invention, instead of the knob 1d, a groove may be provided to make it easier to press the pressing portion 1c with a jig, or the knob 1d and the groove may not be provided.

[0060] In the above first embodiment, the fixing clip 1 is made of PPS resin, which is used for the housings of the inverter unit 10 and the optional member 20, but the present invention is not limited to this. In the present invention, the fixing clip 1 may be made of a material different from that of the inverter unit 10 and the optional member 20, such as silicone, which has vibration-absorbing properties.

[0061] In the second embodiment, the press-fit portion 2b of the press-fit spacer 2 has a cylindrical shape, but the present invention is not limited to this. In the present invention, the press-fit portion 2b may have any shape, such as a square prism, as long as the press-fit portion 2b can be press-fitted into the hole 111.

[0062] In the second embodiment, the hole 111 and the press-fit portion 2b of the press-fit spacer 2 are tapered, but the present invention is not limited to this. In the present invention, the press-fit portion 2b may be configured in any shape, such as a cylindrical shape without a taper, as long as the shape allows the press-fit portion 2b to be press-fitted into the hole 111.

[0063] In the second embodiment, the press-fit spacer 2 is inserted into the hole 111 and then rotated to engage the engagement fixing portion 2g of the press-fit spacer 2 with the lock mechanism 121b, but the present invention is not limited to this. In the present invention, for example, the engagement fixing portion 2g of the press-fit spacer 2 may be configured as a snap fit so that the press-fit spacer 2 can be fixed without being rotated.

[0064] In the second embodiment, four notches 2f are provided in the press-fit portion 2b of the press-fit spacer 2, but the present invention is not limited to this. In the present invention, the number of notches 2f provided in the press-fit portion 2b of the press-fit spacer 2 may be any number as long as it is one or more.

[0065] In the above first and second embodiments, the inverter unit 10 and the optional member 20 are fixed to each other using either the fixing clip 1 or the press-fit spacer 2, but the present invention is not limited to this. The present invention may be configured to fix the inverter unit 10 and the optional member 20 to each other using both the fixing clip 1 and the press-fit spacer 2. [Explanation of symbols]

[0066] 1 Fixing clip (first fixing part) 1a Engagement fixing part 1b Flat plate part (engaging contact part) 1c Pressing part 2 Press-fit spacer (first fixed part) 2b Press-fit portion (engagement abutment portion) 2f Notch 2g Engagement fixing part 10, 110 Inverter section 11 Opening 20, 120 Optional parts 21 Snap Fit 25 Snap fit (second fixing part) 30 Installation section 111 Hole 121 Engagement fixing receiving part

Claims

1. an inverter unit for supplying power to a load; An optional member that is fixed to the inverter unit and provides an additional function to the inverter unit; a first fixing portion that is provided separately from the inverter unit and the optional member and fixes the inverter unit and the optional member; The optional member has a second fixing portion provided on a side surface thereof, A power conversion device in which the inverter unit is fixed to the optional member by attaching the second fixing part to a surface parallel to the side surface of the optional member and by attaching the first fixing part to a surface perpendicular to the side surface of the optional member.

2. 2. The power conversion device according to claim 1, wherein the first fixing portion is arranged to straddle the inverter unit and the optional member, and is configured to fix the inverter unit and the optional member by abutting against both the inverter unit and the optional member.

3. The first fixing portion includes an engagement fixing portion and an engagement abutment portion, 3. The power conversion device according to claim 2, wherein the engaging and fixing portion engages with one of the inverter portion and the optional member, and the engaging and abutting portion abuts against the other of the inverter portion or the optional member, thereby fixing the inverter portion and the optional member.

4. The power conversion device of claim 3, wherein the first fixing portion includes a flat plate portion as the engaging abutment portion, and is configured to fix the inverter portion and the optional member by sandwiching both the inverter portion and the optional member between the flat plate portion and the engaging fixing portion.

5. 5. The power conversion device of claim 4, further comprising a pressing portion that, when pressed, moves the engaging / fixing portion in a direction that disengages the engaging / fixing portion of the first fixing portion from the inverter portion or the optional member, thereby releasing the fixation between the inverter portion and the optional member.

6. The first fixing portion includes a press-fit portion as the engagement abutment portion, the inverter unit includes a hole into which the first fixing portion is press-fitted, The power conversion device according to claim 3 , wherein the press-fit portion of the first fixing portion is configured to be press-fitted into and abut against the hole of the inverter portion, thereby fixing the inverter portion and the optional member.

7. The press-fit portion of the first fixed portion has a cylindrical shape, The optional member includes an engagement fixing receiving portion, The first fixing portion is 7. The power conversion device of claim 6, wherein when the cylindrical press-fit portion of the first fixing part pressed into the hole portion of the inverter part is rotated, the engaging and fixing portion of the first fixing part engages with the engaging and fixing receiving portion of the optional part, thereby fixing the inverter part and the optional part.

8. 8. The power conversion device according to claim 7, wherein the press-in portion of the first fixing part is provided with a notch along a direction in which the press-in portion extends, and is configured such that when the press-in portion is pressed into the hole of the inverter part, the press-in portion is pressed into the hole in a state in which the press-in portion is bent and deformed toward a center of a circle of the cylindrical press-in portion by the notch.

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