JP2750823B2 - Portable power supply device and method of manufacturing casing thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an arc welding machine, a plasma arc cutting machine, a charger, a portable power supply for precious metal plating, and a method of manufacturing a housing thereof.

[0002]

2. Description of the Related Art The conventional portable power supply device rectifies a commercial power supply, switches at a high frequency, and outputs the rectified power again through a high-frequency transformer. The circuit includes a main circuit (heat-generating component) including a switching circuit and a high-frequency transformer, and a control circuit (non-heat-generating component) that detects an output current or an output voltage and controls on / off of a primary-side switching transformer based on the detected value. , It consists of. Such a power supply does not require a large transformer or a large choke, so that
In particular, there is an advantage that the main circuit can be reduced in size.

However, in the above-mentioned power supply device, the number of components to be used is increased, and the circuit is complicated. Therefore, it is difficult to check the circuit after assembly and to perform maintenance and inspection during use. When components are mixed, the control circuit (non-heat generating component) may malfunction due to heat received from the heat generating component.

Accordingly, the applicant has filed Japanese Patent Publication No. 2-41876.
Invented a small power supply device disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-26095. As shown in FIG. 14, this power supply device couples a front plate 51 and a back plate 52 through a plurality of
And a printed circuit board 55 on which a main circuit (not shown) and a control circuit (not shown) are mounted. With this configuration, the front and back surfaces of the printed circuit board 55 can be exposed, and as a result, checking, maintenance, and inspection of each circuit can be easily performed.

[0005] The applicant has also invented a small electronic device disclosed in Japanese Patent Publication No. 3-46556. As shown in FIG. 14, this small electronic device has a region 56 on which a heat-generating component (main circuit) is mounted and a non-heat-generating component (control circuit).
Are provided at the boundary of the area 57 where the fins are mounted. With this configuration, the heat generated by the heat-generating component can be prevented from being transmitted to the control circuit by the radiation fins 58. As a result, malfunction of the control circuit due to heating can be prevented.

[0006]

However, the above-described apparatus or apparatus shown in FIG. 14 has the advantage that each circuit can be easily checked, maintained, and inspected. Is exposed, that is, the bar 4
Since the printed circuit board 55 is provided on the upper surface of the device and another printed circuit board is not provided on the lower surface thereof, there is a certain limit to sufficiently reducing the size of the entire apparatus. If the size is reduced to a certain degree or more, the arrangement of each component becomes complicated, which causes a problem that the wiring is troublesome. In addition, there is a problem that it takes time to fix and fasten each part with a screw.

In the above-described apparatus or apparatus shown in FIG. 14, since the heavy radiation fins 58 are provided on the printed board 55, the printed board 55 may be damaged. In particular, when the apparatus shown in FIG. 14 is a portable type, the printed board 55 may be impacted, and the possibility of breakage is large.

The present invention relates to a portable power supply device having a robust structure, a small size, relatively easy maintenance and inspection, and a malfunction of a control circuit, and a housing capable of reducing the manufacturing cost of the housing. It is intended to provide a manufacturing method.

[0009]

According to a first aspect of the present invention, there is provided a portable power supply device comprising a first side plate and a second side plate which are arranged substantially in parallel with a space therebetween, and the first side plate and the second side plate. Second
Are arranged so as to be substantially perpendicular to both side plates, and are formed at positions facing each other.
And a second end having a first end coupled to a substantially central portion of the first side plate and a second end coupled to a substantially central portion of the second side plate. A middle chassis connecting the side plate and the second side plate to each other, a heating component provided on one of the front and back surfaces of the middle chassis, and a non-heating component provided on the other surface of the middle chassis, It is characterized by having.

[0010] A portable power supply device according to a second aspect of the present invention comprises a first side plate and a second side plate which are arranged substantially parallel to each other at an interval, and the first side plate and the second side plate are connected to each other. The first and second side plates are disposed so as to be substantially orthogonal to each other, and have a first end and a second end formed at positions facing each other, and the first end is the first side plate. And a second chassis having a second end coupled to a substantially central portion of the second side plate to connect the first side plate and the second side plate to each other, and to have a middle chassis having an opening. A radiating fin provided to close the opening of the middle chassis and to radiate heat to one of two regions formed by the middle chassis, and radiate heat from the radiating fin. A heat-generating component provided on the surface of the radiation fin facing the one area; It is characterized in that it comprises a and a non-heat generating component provided on the surface of the chassis in facing the other region of the region.

A portable power supply according to a third aspect of the present invention is the portable power supply according to the first or second aspect, wherein a connection portion between the first end of the middle chassis and the first side plate is provided. At least one connecting portion of the connecting portion between the second end of the chassis and the second side plate is provided with an engaging edge provided on one of the middle chassis and the side plate, An engagement projection that is provided on the other of the side plates and connects the middle chassis and the side plate to each other in a state of being engaged with the engagement edge, and is movable in a direction away from the engagement edge; Is characterized in that:

A portable power supply according to a fourth aspect of the present invention is the portable power supply according to the first, second or third aspect of the present invention, wherein the portable power supply is substantially parallel to each other at intervals and is adjacent to the first and second side plates. A third side plate and a fourth side plate which are arranged together, sandwich the middle chassis therebetween, and are provided substantially orthogonal to the middle chassis, and the third side plate and the fourth side plate, respectively. And a corresponding end of the middle chassis is interposed so as to lock the movement of the middle chassis in a direction substantially parallel to the first, second, third, and fourth side plates. And a ridge to be sandwiched.

A portable power supply device according to a fifth aspect of the present invention is the portable power supply device according to the fourth invention, wherein the third side plate and the fourth side plate are connected to each other, and the third side plate and the fourth side plate are combined. And a pair of hooks for hooking both ends of the shoulder strap at the top.

A portable power supply according to a sixth aspect of the present invention is the portable power supply according to the first, second, third, fourth or fifth invention, wherein one of the middle chassis provided with the heat-generating component is provided. A concave portion provided on the surface of the first member, a cooling fan removably fitted to the concave portion, and a cooling fan provided on at least one of the plurality of side plates, and for moving the cooling fan in a direction away from the concave portion. And a supporting convex portion for stopping.

A method of manufacturing a housing of a portable power supply device according to a seventh aspect of the present invention is a method for manufacturing a portable power supply device, comprising: a first side plate as a front panel; a second side plate as a rear panel; In the method for manufacturing a housing of a portable power supply device formed by a fourth side plate having the same shape as the third side plate, the first fitting die for forming the output component mounting portion is provided. Forming the first side plate using the fitted first main body mold, and forming the second side plate for forming the input component mounting portion in place of the first fitted mold.
Forming a second side plate by using the first main body mold into which the fitting die of the second main body is fitted; forming a third side plate by using the second main body mold; Molding the fourth side plate using the main body mold of (1).

[0016]

According to the portable power supply device of the first invention, the first side plate, the second side plate, and the middle chassis connected to each other are cut at a plane perpendicular to these three parts. The cross-sectional shape is substantially H-shaped. That is, since the first side plate, the second side plate, and the middle chassis have an H-shaped structure, they are hardly deformed by a compression, pulling, bending, or other force received from all directions, and have a strong structure.

Since the heat-generating component and the non-heat-generating component are separated by the middle chassis, the heat generated by the heat-generating component can be hardly transmitted to the non-heat-generating component.

Since the heat-generating component is provided on the back (or front) of the middle chassis and the non-heat-generating component is provided on the front (or back) of the middle chassis, the heat-generating component is first placed on the back of the middle chassis. (Or the front surface), and the non-heat-generating components can be exposed on the front surface (or the back surface) of the middle chassis. The middle chassis can be made smaller as compared with a configuration in which heat-generating components and non-heat-generating components are provided on the upper surfaces of the bars 3 and 4 as in the device shown in FIG.

According to the portable power supply of the second aspect, since the heat-generating component and the non-heat-generating component are separated by the radiation fins, the heat generated by the heat-generating component can be hardly transmitted to the non-heat-generating component. Then, the heat generated by the heat-generating component can be absorbed by the radiation fins, and the absorbed heat can be prevented from being transmitted to the region where the non-heat-generating component is provided. Other than this, the operation is the same as that of the portable power supply device of the first invention, and the description is omitted.

According to the portable power supply of the third invention, the connection between the first end of the middle chassis and the first side plate and the connection between the second end of the middle chassis and the second side plate. At least one of the connecting portions has an engaging edge and an engaging convex portion, and the one side plate and the middle chassis are connected by engaging the engaging edge and the engaging convex portion. be able to.
Then, the one side plate and the middle chassis can be separated from each other by removing the engaging projection from the edge of the engaging portion.

According to the portable power supply device of the fourth invention, each end on both sides of the middle chassis is sandwiched by the ridges provided on the third and fourth side plates, whereby the first, second, and
The movement of the middle chassis in a direction parallel to the third and fourth side plates, ie, a direction substantially perpendicular to the plane formed by the middle chassis, can be locked. Then, by pulling the third or fourth side plate provided with the ridges away from the middle chassis, the ridges and the middle chassis can be separated.

According to the portable power supply device of the fifth invention, the middle chassis provided with the heat-generating component and the non-heat-generating component is securely supported by the ridges provided on the third and fourth side plates. And it is the structure which provided the handle on the upper part of this 3rd and 4th side plate. Therefore, when the portable power supply is lifted by grasping the handle, the first side plate or the second side
The connecting portion between the side plate and the middle chassis does not receive a certain weight or more. In addition, since the configuration is such that a hook portion for a shoulder band is provided on the upper portion of the third and fourth side plates, even when the portable power supply device is hung with the band hanging on the shoulder, the connection portion is connected to the connection portion. No more than a certain weight is applied.

According to the portable power supply of the sixth aspect, since the cooling fan is provided in the area where the heat-generating component is provided, the heat generated by the heat-generating component can be released to the outside. Then, the cooling fan can be locked by the concave portion and the supporting convex portion.

According to the method of manufacturing a housing of a portable power supply device of the seventh invention, the same first main body mold is used for the first side plate as the front panel and the second side plate as the rear panel. The third side plate as one side cover and the fourth side plate as the other side cover can be formed using the same second main body mold. Since the shape of the output component mounting portion of the first side plate and the shape of the input component mounting portion of the second side plate are different, when the first side plate is molded, the first main body mold has the first main body mold. The fitting mold is fitted and molded. And the second
When molding the side plate, the second fitting mold is fitted into the first main body mold.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which a portable power supply according to the present invention is applied to a portable power supply for a plasma arc cutting machine will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an attached state of the portable power supply device. 8 to 11
It is a right side view, a front view, a rear view, and a plan view of the portable power supply device. 1 is a middle chassis, 2 is a front panel (first side plate), 3 is a rear panel (second side plate), 4 is a left side cover (third side plate), and 5 is a right side cover ( (Fourth side plate).

As shown in FIG. 1, the middle chassis 1 is formed in a rectangular frame shape that is long in the front-rear direction, and has an opening 1a in the center that is slightly smaller than a cooling heat sink 12 described later. Behind the portion 1a (on the side of the rear panel 3), a concave portion 1g into which an upper portion of a cooling fan 14 to be described later is fitted.
It has. Further, the left and right ends (first ends) of the front end surface 1h of the middle chassis 1 and the left and right ends (second ends) of the rear end surface 1i are respectively parallel to the front or the rear. An extension portion 1j (see FIG. 5) extending rearward is protrudingly provided.
On the outer surface of the distal end portion of each of these extension portions 1j, an engagement projection 1k is provided.
(FIG. 1 shows three out of four extension portions 1j).
One has appeared. ). As shown in FIG. 5, grooves 1m are provided on the front end face and the rear end face so that the extension 1j is easily bent inward.

FIG. 5A shows that when the front panel 2 is viewed from the front, the engaging projection 1k located on the right side of the middle chassis 1 is engaged with the engaging edge 2e of the insertion hole 2d provided in the front panel 2. FIG. 5 is a cross-sectional view showing a state in which
(C) is a side view showing a state where the engaging projection 1k is engaged with the insertion hole 2d. As shown in FIGS. 5A and 5C,
In a state where the engaging projection 1k is engaged with the insertion hole 2d, the front edge, the rear edge, the upper edge, and the lower edge of the engagement projection 1k are in contact with the corresponding inner edges of the insertion hole 2d. 1k
And an insertion hole 2d. The front edge, the rear edge, the upper edge, and the lower edge of the insertion hole 2d are the engagement edges 2e. The outer surface 1n of the extension 1j also contacts the side edge of the insertion hole 2d. Although not shown in detail in the drawing, the remaining three sets of the engagement projections 1k and the insertion holes 2d are also shown in FIG.
It is formed in the same manner as that shown in (c), and a detailed description is omitted.

With this configuration, when the pair of engaging projections 1k provided on the front end face of the middle chassis 1 engage with the pair of insertion holes 2d provided on the front panel 2, the middle chassis 1 and the front panel 2 are connected. The positional relationship is fixed and they are combined. Similarly, when a pair of engaging projections 1k provided on the rear end face of the middle chassis 1 engage with a pair of insertion holes 2d provided in the rear panel 3, the middle chassis 1 and the rear panel 3 are in a positional relationship with each other. Fixed and combined. When removing the front panel 2 or the rear panel 3 from the middle chassis 1, for example, the engaging projection 1k shown in FIG. 5A may be pushed inward with a finger to remove the engaging projection 1k from the insertion hole 2d. (FIG. 5
(See (a) and (c)). At this time, since the extension 1j (middle chassis 1) is made of synthetic resin, it is elastically deformed inward by the pressing force of the finger, so that the engaging projection 1k can be easily removed from the insertion hole 2d.

As shown in FIG. 1, the front panel 2 has two output terminals 2f, 2f,
A total of three openings 2g for attaching one output part 2c as a gas outlet are provided. On the contrary,
As shown in FIG. 1, one opening 3 for attaching an input unit 3c such as a gas inlet to the lower panel 3 is provided in the lower panel.
d is provided. In other words, the front panel 2 is provided with three openings 2g, whereas the rear panel 3 is provided with one opening 3d. It is. That is, both the front panel 2 and the rear panel 3 are vertically long rectangular plate-like bodies. For example, an opening 2a for mounting an operation printed circuit board 21 to be described later on each upper part, a plurality of passages 2b for cooling air are provided. , An insertion hole 2d is provided.
a, the passage 2b, and the insertion hole 2d have the same position and shape.

The left side cover 4 is, as shown in FIG.
The vertical cross section has a substantially U-shape. Right side cover 5
(Not shown in FIG. 1; see FIGS. 8 to 11).
The left side cover 4 is symmetrical with the left side cover 4 and has the same shape. Therefore, the two left and right side covers 4, 5
Are joined to each other by screws as shown in FIG. 9 to form a square tube having a cross-sectional shape. As shown in FIG. 1, a pair of ridges 4 spaced apart from each other and parallel to the cylinder direction are provided on the inner surfaces of the left and right side covers 4 and 5, respectively.
As shown in FIG. 4, the upper edge 1p and the lower edge 1q of the left side surface of the middle chassis 1 are interposed between the pair of protrusions 4a on the left side, and a pair of protrusions on the right side. Articles 4a and 4a
The upper edge 1p and the lower edge 1q of the right side surface of the middle chassis 1 are interposed therebetween, thereby firmly supporting the middle chassis 1 so as not to move upward or downward. Further, FIG.
As shown in FIG. 3, two recesses 4c are provided between the ridges 4a of the left and right side covers 4, 5 which are parallel to each other.
Each of the recesses 4c is fitted with a positioning protrusion 1r provided on the left side surface or the right side surface of the middle chassis 1 so that the middle chassis 1 can be positioned with respect to each side cover 4, 5. .

Further, as shown in FIG. 1, support projections 4d are provided on the inner surfaces of the rear portions of the left and right side covers 4, 5 (FIG. 1 omits the right side cover 5). And
Only the support projection 4d provided on the left side cover 4 is shown. As shown in FIG. 6, the support projection 4d abuts on the lower surface of the cooling fan 14 fitted into the recess 1g provided in the middle chassis 1, and supports the cooling fan 14 so as not to come off from the recess 1g. ing.

As shown in FIG. 1, a handle 4f formed in a state where both the side covers 4, 5 are combined is provided above the left and right side covers 4, 5. The portable power supply device can be carried by holding the handle 4f by hand. A notch 4g is provided at the base end of the handle 4f, and a pair of hooks 4h for hooking the annular portions 6a formed at both ends of the shoulder strap 6 are provided.
Is provided. The portable power supply can be carried around by hanging the band 6 on a shoulder. The upper and lower portions of the left and right side covers 4 and 5 are provided with a total of four screw insertion holes 4i for connecting them to each other.

The left and right side covers 4, 5 are
A tubular section having a quadrangular cross section is formed in a state where the tubular sections are connected to each other, and protruding edges 4j and 4k are provided inside the front and rear openings of the tubular section. These ridges 4
j, 4k engage with the outer peripheral edge of the front panel 2 or the rear panel 3 which fits into each opening and closes each opening,
It has a function of firmly locking the front panel 2 or the rear panel 3 so as not to come off.

Next, the heat-generating component 61 provided on the lower surface of the middle chassis 1 and the non-heat-generating component 62 provided on the upper surface of the middle chassis 1 shown in FIG. 1 will be described. That is, in a space formed by the front panel 2, the rear panel 3, the left and right side covers 4, 5 shown in FIG. 1, a lower region 63 shown in FIG. , A heating component 61 is provided, and a non-heating component 62 is provided in the upper region 64.

As shown in FIG. 1, the heat generating component 61 includes a power semiconductor module 11, a high frequency transformer 13, a high frequency unit 31, and a high frequency generating coupling coil 65.
Consists of The power semiconductor module 11 is internally wired with power switching elements such as rectifier diodes and power transistors, power semiconductor elements such as flywheel diodes, and drive circuits for the switching elements. The power semiconductor module 11 is mounted on an upper surface of a cooling heat sink (radiation fin) 12. The cooling heat sink 12 is mounted on the lower surface of the middle chassis 1 so as to close the opening 1 a in the middle chassis 1. Fastened with screws. The high-frequency transformer 13 has a mounting portion 13a at an upper portion, and is fixed to a lower surface of the middle chassis 1 by fastening with screws. The high-frequency unit 31 is attached to the lower surface of the cooling heat sink 12, and the coupling coil 65 is connected to the high-frequency transformer 1.
3 is connected. The heat of the heat generating component 61 and the cooling heat sink 12 is cooled by the cooling fan 14. That is, by driving of the cooling fan 14, cold external air flows in from the passage 2 b of the front panel 2, deprives the heat generated by the heat-generating component 61 of the passage 2 b of the rear panel 3.
b flows out of the portable power supply device.

As shown in FIG. 1, the non-heat-generating component 62 has a control printed circuit board 15 on which control components are mounted and the control printed circuit board 15 mounted thereon, and includes main circuit components such as a smoothing capacitor. And a main printed circuit board 16 mounted thereon. This main printed circuit board 16
Are fastened to the boss 1c provided on the upper surface of the middle chassis 1 with screws.

Reference numeral 21 shown in FIG. 1 is an operation printed circuit board. This operation pudding board is connected to the control printed board 15 via a flexible electric wire 66, and the switch 2
1a, an indicator light and an output adjuster are mounted. The operation printed circuit board 21 includes an operation cover 22.
At the same time, it is fastened by screws so as to cover the opening 2a of the front panel 2. Reference numeral 23 shown in FIG. 1 is a power input fixed insulating plate. This power input fixed insulating plate 23
Power input components such as a power cable 67 and a power switch 68 are mounted, and are fastened with screws so as to cover the opening 3a of the rear panel 3. 24 shown in FIG.
Is a gas electromagnetic valve (connected to the input unit 3c such as a gas inlet) for opening and closing the flow path of the working gas used for the plasma arc, for example. This gas electromagnetic valve 24
One opening is connected to a source of working gas,
The other opening is connected to an output portion 2c as a gas outlet provided on the front panel 2 via a joint or a pipe (not shown).

According to the portable power supply device configured as described above, as shown in FIG. 2 (right side view of the front panel 2, the rear panel 3, and the middle chassis 1), the front panel 2, the rear panel 3, and the middle Since the chassis 1 has an H-shaped structure, the chassis 1 is hardly deformed by a force such as compression, pulling, bending, or the like, which is applied to the power supply device in any direction, and has a strong structure. In other words, the portable power supply device often receives an impact during transportation, but can prevent the heat-generating component 61 and the non-heat-generating component 62 from being damaged by such an impact.

Since the heat-generating component 61 and the non-heat-generating component 62 are separated by the middle chassis 1, the heat-generating component 6
1 (for example, the high-frequency unit 31) can be prevented from being easily transmitted to the non-heat-generating component 62.
A malfunction due to heat of the non-heat-generating component 62 (for example, the main printed circuit board 16) can be prevented. In addition, the heat generating component 61
Heat sink 12 for radiating the heat generated
Can be provided on the middle chassis 1, so that the main printed circuit board 16 and the like are not damaged by the weight of the cooling heat sink 12.

Further, as shown in FIG. 1, the heat generating component 61 can be exposed on the lower surface of the middle chassis 1, and
Since the non-heat generating component 62 can be exposed on the upper surface of the middle chassis 1, the left and right side covers 4, 5
By removing one or both of them, all circuits and components can be easily checked, maintained, and inspected.
Furthermore, since the heat generating component 61 and the non-heat generating component 62 are provided using both the upper surface and the lower surface of the middle chassis 1, the heat generating component and the non-heat generating component are connected to the bar 3, as shown in FIG. 4, the size of the middle chassis 1 can be made smaller than that of the structure provided on the upper surface of the device 4, thereby reducing the size of the entire device. In addition, since the heat-generating components 61 and the like are provided using both surfaces of the middle chassis 1 in this manner, the intervals between the components can be widened, thereby facilitating assembly of components and fastening and fixing with screws. Can be done.

The lower region 6 provided with the heat-generating component 61
3 and the upper region 64 provided with the non-heat-generating component 62 are separated by the cooling heat sink 12 and the middle chassis 1, so that the heat generated by the heat-generating component 61 is not transmitted to the region 64 provided with the non-heat-generating component 62. You can do so.
Then, the heat generated by the heat generating component 61 is absorbed by the cooling heat sink 12, and the absorbed heat is
Is provided to the lower region 63 provided with the non-heat-generating component 62, so that a malfunction due to heat of the non-heating component 62 can be prevented. Although the power semiconductor module 11 as the heat generating component 61 is provided in the upper region 64 where the non-heat generating component 62 is provided, since the power semiconductor module 11 is provided in contact with the heat sink 12 for cooling, The heat generated by the semiconductor module 11 is transferred to the heat sink 12 for cooling.
Accordingly, heat can be radiated to the lower region 63. Therefore, heat generated by the power semiconductor module 11 is hardly released to the upper region 64.

Further, the front panel 2, the middle chassis 1, and the rear panel 3 are connected by engaging the insertion holes 2d formed in the front panel 2 and the rear panel 3 with the engaging projections 1k of the middle chassis 1. In this configuration, one panel or both panels can be removed from the middle chassis 1 by removing the engaging projection 1k from the insertion hole 2d. That is, the panels 2, 3 can be used without using a tool or the like.
And the middle chassis 1 can be assembled and disassembled extremely easily.

Further, since the upper edge 1p and the lower edge 1q of each corresponding side surface of the middle chassis 1 are sandwiched and supported between the ridges 4a and 4a provided on the left and right side covers 4, 5, The right and left side covers 4 and the middle chassis 1 can be assembled and disassembled extremely easily without using any tools. Then, the middle chassis 1 can be securely fixed to the left and right side covers 4 and 5 by the protrusions 4a.

The heating component 61 and the non-heating component 62
Are firmly supported by ridges 4a, 4a,... Provided on the left and right side covers 4, 5, and the upper portion of the left and right side covers 4, 5 is provided. Is provided with a handle 4f. Therefore,
When the handle 4f is gripped and the portable power supply device is lifted, the extension 1j as a connecting portion between the front panel 2 or the rear panel 3 and the middle chassis 1 does not receive a certain weight or more. The extension 1j can be prevented from being damaged. Also, even when the portable power supply device is hung with the shoulder strap 6 hung on the shoulder, the extension 1j does not receive a certain weight or more.

Further, the heat generating component 6 is controlled by the cooling fan 14.
Since the heat generated by 1 can be released to the outside, overheating of the heat-generating component 61 and thus the non-heat-generating component 62 can be prevented. Then, the cooling fan 14 can be reliably fixed by the concave portion 1g and the supporting convex portion 4d.
Further, since the cooling fan 14 is fixed by engaging the concave portion 1g and the supporting convex portion 4d, the cooling fan 14 can be fixed and attached to the middle chassis 1 very easily without using a tool or the like. And can be removed.

Next, referring to FIG.
And a method of manufacturing the rear panel 3 and FIG.
3, a method of manufacturing the left and right side covers 4, 5 will be described. These front panel 2, rear panel 3,
The left and right side covers 4, 5 are manufactured by a resin molding machine using an injection mold. First, a method for manufacturing the front panel 2 and the rear panel 3 will be described. FIG. 12 (a)
FIG. 3 is a cross-sectional view illustrating a method of forming the front panel 2. In the figure, reference numeral 69 denotes an upper first main body mold;
Is a lower first main body mold, and 71 is a first fitting mold.

The first fitting die 71 is for molding two openings 2g on both sides of the three openings 2g provided at the lower part of the front panel 2. One opening 2g at the center is the lower first opening shown in FIG.
Is molded by a third fitting mold 73 which is detachably attached to the center of the main body mold 70. The two first fitting dies 71 are detachably connected to the lower first main body dies 70 (not shown).

The upper first main body mold 69 is attached to, for example, a movable board, and the lower first main body mold 70 is attached to a fixed board. The molding material, which is a melt of a thermoplastic synthetic resin, includes an upper first body mold 69, a lower first body mold 70, two first fitting molds 71, and a third fitting mold. It is injected into the cavity formed by the mold 73 from an injection port (not shown). After cooling, the upper first main body mold 69 together with the movable platen is moved upward in the figure, and then the molded front panel 2 is taken out. The front panel 2 thus formed includes
Three openings 2g shown in FIG. 1 are formed.

FIG. 12B is a sectional view showing a method of forming the rear panel 3. 72 shown in the figure is a second fitting die. These two second fitting molds 72 are detachably coupled to the lower first main body mold 70 in place of the two first fitting molds 71.
Lower first body mold 70, upper first body mold 69
Are the same as those in FIG. 12A and are shared.
As shown in FIG. 12B, the second fitting mold 72 has a concave portion 7 for attaching the first fitting mold 71.
4 is to be closed.

The molding material, which is a melt of thermoplastic synthetic resin, comprises an upper first main body mold 69, a lower first main body mold 70, two second fitting molds 72, and a third Is injected into the cavity formed by the fitting die 73 through an injection port (not shown). After cooling, the upper first main body mold 69 is moved upward in the figure, and then the molded rear panel 3 is taken out. The rear panel 3 thus formed has one opening 3d shown in FIG.
Are formed.

Next, a method of manufacturing the left and right side covers 4 and 5 will be described with reference to FIG. Since these two left and right side covers 4, 5 have the same shape,
The upper second main body mold 75 shown in FIG.
Is molded using the main body mold 76 of FIG. FIG. 13 is a cross-sectional view of the upper second main body mold 75 and the lower second main body mold 76. The upper second main body mold 75 is attached to, for example, a movable platen, and the lower second main body mold 76
Is attached to the fixed board.

The molding material, which is a melt of thermoplastic synthetic resin, is injected into a cavity formed by the upper second main body mold 75 and the lower second main body mold 76 (shown in FIG. 1). )). After cooling, the upper second main body mold 75 is moved upward in the figure, and then the molded left or right side covers 4 and 5 are taken out.

According to the manufacturing method shown in FIGS. 12A and 12B, the first and second fitting dies 71 having different shapes in the same upper and lower first main body dies 69 and 70. Or 72
, The front panel 2 and the rear panel 3 having different numbers of the openings 2g and 3d can be formed.
The front panel 2 and the rear panel 3 can be formed only by preparing the upper and lower first main body dies 69 and 70 with the second and third fitting dies 71, 72 and 73. . The third fitting mold 73 may be formed integrally with the lower first main body mold 70. In that case, it is only necessary to prepare the first and second fitting dies 71, 72 and a pair of upper and lower first main body dies 69, 70. That is, when molding the front panel 2 and the rear panel 3 having different shapes, the upper and lower first main body dies 69 and 70 can be shared, so that the cost of the dies is reduced in this respect. can do. And, for example,
When the rear panel 3 is formed after the front panel 2 is formed, the upper and lower first body dies 69 and 70 are formed.
It is not necessary to replace the dies, it is only necessary to replace the two first fitting dies 71 having a light weight, and the working time for replacing the dies can be shortened.

According to the manufacturing method shown in FIG. 13, the left and right side covers 4, 5 can be formed using the same upper and lower second main body molds 75, 76.
The cost of the mold for molding the left and right side covers 4, 5 can be significantly reduced. Therefore, for example, when the right side cover 5 is formed after the left side cover 4 is formed, it is not necessary to replace the upper and lower second main body dies 75, 76. Work time is also short.

However, in the above embodiment, as shown in FIG. 1, a notch 4g is provided at the base end of the handle 4f, and a pair of hooks for hooking the annular portions 6a formed at both ends of the shoulder strap 6 are provided. Although the portion 4h is provided, as shown in FIG.
A configuration in which a hook portion 4m protruding upward from the handle 4f may be provided.

The portable power supply of the above embodiment is
Applied for plasma arc cutting machine, arc welding machine,
It can be applied to a charger or a noble metal plating.
Further, the present invention can be applied to a portable power supply device that can be used for both a plasma arc cutting machine and an arc welding machine.

In the above embodiment, the front panel 2
Although three openings 2g are provided on the rear panel 3 and one opening 3d is provided on the rear panel 3, a configuration may be employed in which each panel 2, 3 is provided with as many openings as necessary. For example,
When the openings 2g and 3d as passages for the working gas are not provided in the front panel 2 and the rear panel 3, the third fitting mold 7 shown in FIGS.
The panels 2 and 3 may be formed by attaching the second fitting mold 72 to the lower first body mold 70 instead of the mold 3. Of course, by changing the shapes and mounting positions of the first to third fitting dies 71 to 73, each panel 2, 3 can be formed into a desired shape.

Further, in the above embodiment, as shown in FIG. 5, the extension portion 1j having the engagement projection 1k is provided on the middle chassis 1, and the engagement edge 2 is provided on the front panel 2 and the rear panel 3.
e, an insertion hole 2d having an engagement edge 2e is provided in the middle chassis 1, and an extension 1j having an engagement protrusion 1k is provided in the front panel 2 and the rear panel 3. can do.

In the above embodiment, as shown in FIG. 1, the high-frequency unit 31 was attached to the lower surface of the cooling heat sink 12, but as shown in FIG. It is possible to provide a configuration in which a cylindrical holding member 77 is provided on the side surface, and the high-frequency unit 31 is fixedly attached by the holding members 77 on both sides.

Further, in the above embodiment, as shown in FIG.
And three openings 2g for attaching the output terminals 2f and the like of the power supply device are provided at the lower part. However, the operation printed circuit board 21 is provided at the right side (or left side) of the front panel 2, and the left side part ( Or the right side) may be provided with three openings 2g for attaching the output terminals 2f and the like of the power supply device.

Further, in the above embodiment, as shown in FIG. 2, the heat-generating component 61 is provided on the lower surface side of the middle chassis 1 and the non-heat-generating component 62 is provided on the upper surface side, but as shown in FIG. A heat-generating component 61 and components such as a cooling fan 14 and the like are provided on the upper surface side of the chassis 1, and a non-heat-generating component 6 is provided on the lower surface side.
2 can be provided.

In the above embodiment, as shown in FIG. 1, the middle chassis 1 is provided in the horizontal direction in a state in which the power supply device stands up. can do.

In the above embodiment, the engaging protrusions 1k are provided on the front end face and the rear end face of the middle chassis 1, so that the middle chassis 1 can be attached to and detached from the front and rear panels 2, 3 without tools. An engaging projection 1k may be provided on any one surface of the chassis 1 to make it detachable, and the other surface and a panel corresponding to that surface may be fastened with screws or the like.

Further, in the above-described embodiment, the support projections 4d of the cooling fan 14 are provided on both the left and right side covers 4, 5, but may be provided on one of the side covers.

In the above embodiment, the opening 1a is provided in the middle chassis 1, but the opening 1a is not provided.
That is, the upper region 64 and the lower region 6 are formed by the middle chassis 1.
3 can be configured.

[0066]

According to the portable power supply device of the first invention,
Since the first side plate, the second side plate, and the middle chassis have an H-shaped structure, the first side plate, the second side plate, and the middle chassis are hardly deformed by a force such as compression, tension, bending, or the like received from all directions, and have an effect that the structure is strong. That is, the portable power supply device often receives a shock during transportation, but can prevent damage to the heat-generating component and the non-heat-generating component due to such a shock.

Since the heat-generating component and the non-heat-generating component are separated by the middle chassis, the heat generated by the heat-generating component can be hardly transmitted to the non-heat-generating component. There is an effect that malfunction due to heat can be prevented. In addition, a radiating fin for radiating the heat generated by the heat-generating component can be provided on the middle chassis.
The printed circuit board 55 is not damaged by the weight of the radiation fin.

Since the heat-generating components can be exposed on the back (or front) of the middle chassis, and the non-heat-generating components can be exposed on the front (or back) of the middle chassis, all the circuits can be exposed. In addition, there is an effect that checking, maintenance, and inspection of parts can be easily performed.
Further, since the heat generating component and the non-heat generating component are provided using both the front surface and the rear surface of the middle chassis, the heat generating component and the non-heat generating component are connected to each other as shown in FIG.
As compared with the configuration provided only on the upper surface of the device, the size of the middle chassis can be reduced, and thus, there is an effect that the entire device can be reduced in size. And since the heat-generating parts etc. are provided by using both sides of the middle chassis, the space between the parts can be widened, which makes it easy to assemble the parts and tighten and fix them with screws. There is an effect that can be performed.

According to the portable power supply device of the second aspect of the present invention, the area where the heat-generating components are provided and the area where the non-heat-generating components are provided are separated by the radiation fins and the middle chassis. Is not transmitted to the area where the non-heat-generating components are provided. The heat generated by the heat-generating component is absorbed by the heat-radiating fins, and the absorbed heat is released to the area where the heat-generating component is provided. Therefore, a malfunction due to the heat of the non-heat-generating component (control circuit) is prevented. There is an effect that can be. Except for this, the portable power supply device has the same effects as those of the portable power supply device of the first invention, and a description thereof will be omitted.

According to the portable power supply device of the third invention, one side plate and the middle chassis can be connected by engaging the engaging edge with the engaging convex portion, and the engaging convex portion is engaged. It is a configuration in which one side plate and the middle chassis can be separated by detaching from the joint edge. Thus, there is an effect that the assembly and disassembly of one side plate and the middle chassis can be performed extremely easily without using a tool or the like.

According to the portable power supply device of the fourth invention, each of the corresponding ends of the middle chassis is sandwiched and supported between the ridges provided on the third and fourth side plates. Therefore, there is an effect that the third and fourth side plates and the middle chassis can be assembled and disassembled extremely easily without using a tool or the like. And there is an effect that the middle chassis can be securely fixed to the third and fourth side plates by the ridges.

According to the portable power supply device of the fifth invention, when the portable power supply device is gripped and lifted or when the band is hung on the shoulder, the first side plate or the second side plate can be used. Since a certain weight or more is not applied to the connecting portion with the middle chassis, there is an effect that the connecting portion can be prevented from being damaged. That is, there is an effect that the middle chassis can be firmly fixed to the third and fourth side plates, and damage to the connecting portion can be prevented.

According to the portable power supply of the sixth aspect, since the heat generated by the heat-generating component can be released to the outside by the cooling fan, it is possible to prevent the heat-generating component and thus the non-heat-generating component from overheating. Effective. And
The cooling fan can be securely fixed by the concave portion and the supporting convex portion. In addition, since the cooling fan is fixed by engaging the cooling fan with the concave portion and the supporting convex portion, the cooling fan can be fixed and attached to the middle chassis very easily without using tools or the like, and can be removed. There is an effect that can be.

According to the method of manufacturing the housing of the portable power supply device of the seventh invention, the third side plate as one side cover and the fourth side plate as the other side cover are made of the same second main body. Since molding can be performed using a mold, there is an effect that the cost of the mold for molding the third and fourth side plates can be extremely reduced. Therefore, for example, when the fourth side plate is formed after the third side plate is formed, there is no need to replace the mold, and there is also an effect that the working time for the mold replacement can be shortened.

By fitting the first or second fitting molds having different shapes into the same first main body mold, the first panel as a front panel having different shapes of the input component mounting portion and the output component mounting portion is formed. Side plate and second as rear panel
The first and second side plates can be formed simply by preparing first and second fitting molds and a first main body mold for forming these mounting portions. be able to. That is, when the first and second side plates having different shapes are formed, the first main body mold can be used in common, so that the cost of the mold can be reduced in this respect. . Then, for example, when the second side plate is formed after the first side plate is formed, it is not necessary to replace the first main body mold, and only the light insertion mold must be replaced. There is also an effect that the working time for changing the mold can be shortened.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a mounted state of a portable power supply device according to an embodiment of the present invention.

FIG. 2 is a side view showing an H structure formed by a front panel, a middle chassis and a rear panel of the embodiment.

FIG. 3 is a side view showing another example of the H structure of the front panel, the middle chassis, and the rear panel in which the heat-generating component of the embodiment is provided in an upper region and non-heat-generating components are provided in a lower region.

FIG. 4 is a front view of a front panel, a middle chassis, and a rear panel of the embodiment.

FIG. 5A is a cross-sectional view illustrating an engagement state between an engagement protrusion of the embodiment and an engagement edge of an insertion hole, and FIG. 5B is a diagram illustrating a relationship between the engagement protrusion and the insertion hole of the embodiment. Sectional view showing a disengaged state with the mating edge,
(C) is a side view showing the state of engagement between the engaging projection of the embodiment and the engaging edge of the insertion hole, and (d) is the side view of the engaging projection of the embodiment and the engaging edge of the insertion hole. It is a side view which shows a disengaged state.

FIG. 6 is a longitudinal sectional view showing a state of attachment of the cooling fan of the embodiment.

FIG. 7 is a perspective view showing another example of the hook portion of the embodiment.

FIG. 8 is a right side view of the portable power supply device according to the embodiment.

FIG. 9 is a front view of the portable power supply device according to the embodiment.

FIG. 10 is a rear view of the portable power supply device according to the embodiment.

FIG. 11 is a plan view of the portable power supply device according to the embodiment.

FIG. 12A is a cross-sectional view showing a first fitting mold for forming the front panel of the embodiment, and upper and lower first main body molds, and FIG. 12B is a sectional view of the embodiment. A second fitting mold for forming the rear panel, the first upper and lower molds
It is sectional drawing which shows the main body metal mold | die of.

FIG. 13 is a cross-sectional view showing upper and lower second body dies for molding the left or right side cover of the embodiment.

FIG. 14 is an exploded perspective view showing an attached state of a conventional power supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Middle chassis 1a Opening 1k Engagement convex part 2 Front panel (1st side plate) 2e Engagement edge 3 Rear panel (2nd side plate) 4 Left side cover (3rd side plate) 4a Ridge 4d Support convex part 4f Handle 4h Hook 5 Right side cover (fourth side plate) 12 Cooling heat sink (radiating fin) 14 Cooling fan 61 Heat generating component 62 Non-heat generating component 63 Lower region 64 Upper region 69 Upper first body mold 70 Lower first body mold 71 First fitting mold 72 Second fitting mold 75 Upper second body mold 76 Lower second body mold

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenzo Dangami 2-14-3 Awaji, Higashiyodogawa-ku, Osaka-shi, Osaka Prefecture Sansan Electric Manufacturing Co., Ltd. (72) Inventor Seiji Tanaka 2 Awaji, Higashiyodogawa-ku, Osaka-shi, Osaka No. 14-3, Sansha Electric Manufacturing Co., Ltd. (56) References JP-A-2-296418 (JP, A) JP-A 55-152730 (JP, U) JP-A 57-130473 (JP, U) Shokai Sho 62-135480 (JP, U) Jiko Hei Hei 4-46556 (JP, Y2) Jiko Hei 2-41876 (JP, Y2) Jiko Hei 7-41185 (JP, Y2)

Claims (7)

(57) [Claims] 1. A first side plate and a second side plate which are arranged substantially parallel to each other with an interval therebetween, and between the first side plate and the second side plate, the both side plates are substantially perpendicular to the first side plate and the second side plate. And has a first end and a second end formed at positions facing each other, the first end being connected to the substantially central part of the first side plate, and The second chassis is connected to the substantially central portion of the second side plate to connect the first side plate and the second side plate to each other, and is provided on one of the front surface and the rear surface of the middle chassis. A portable power supply device comprising: a heat-generating component; and a non-heat-generating component provided on the other surface of the middle chassis. 2. A first side plate and a second side plate which are arranged substantially parallel to each other with an interval therebetween, and between the first side plate and the second side plate, the both side plates are substantially perpendicular to the first side plate and the second side plate. And has a first end and a second end formed at positions facing each other, the first end being connected to the substantially central part of the first side plate, and An end of the second chassis is connected to a substantially central portion of the second side plate to connect the first side plate and the second side plate to each other, and has a middle chassis having an opening, and closes the opening of the middle chassis. A radiating fin provided so as to emit heat to one of the two regions partitioned by the middle chassis, and the fin facing the one region from which the heat is radiated from the radiating fin. A heat-generating component provided on the surface of the radiation fin; And a non-heat-generating component provided on a surface of the middle chassis. 3. The portable power supply device according to claim 1, wherein a connecting portion between the first end of the middle chassis and the first side plate, and a second end and a second end of the middle chassis. At least one connecting portion of the connecting portions with the second side plate is provided on an engaging edge provided on one of the middle chassis and the side plate, and on the other of the middle chassis and the side plate. The middle chassis and the side plate are connected to each other in a state of being engaged with the engagement edge, and an engagement protrusion that is movable in a direction away from the engagement edge is provided. Portable power supply. 4. The portable power supply device according to claim 1, 2 or 3, wherein each of the first and second power supply devices is substantially parallel to each other and spaced apart from each other by a first power supply.
A third side plate and a fourth side plate which are arranged adjacent to the second side plate and which are provided so as to interpose the middle chassis therebetween and to be substantially orthogonal to the middle chassis; and And a fourth side plate provided on each inner side surface of the middle chassis so as to stop the movement of the middle chassis in a direction substantially parallel to the first, second, third, and fourth side plates. A portable power supply device, comprising: a ridge for sandwiching a corresponding end portion therebetween. 5. The portable power supply device according to claim 4, wherein the third side plate and the fourth side plate are connected to each other, and a handle for carrying is provided on the upper portion of the third side plate and the fourth side plate. And a pair of hooks for hooking both ends of the shoulder strap on the upper portion. 6. The portable power supply device according to claim 1, wherein the heat generating component is provided on one surface of the middle chassis, and the concave portion is attached to and detached from the concave portion. A cooling fan that fits freely, and a supporting protrusion that is provided on at least one of the side plates and that stops movement of the cooling fan in a direction away from the recess. Characteristic portable power supply. 7. A first side plate as a front panel, a second side plate as a rear panel, a third side plate as one side cover, and a fourth side plate having the same shape as the third side plate. In the method for manufacturing a housing of a portable power supply device formed by the side plate of (1), a first fitting die for fitting an output component mounting portion is fitted.
Forming a first side plate using the main body mold of the first embodiment, and a first main body in which a second fitting mold for forming an input component mounting portion is fitted instead of the first fitting mold. Forming a second side plate using the mold, forming a third side plate using the second body mold, and forming a fourth side plate using the second body mold. Forming a housing of the portable power supply device.