Power cord layout structure

Abstract

The present invention relates to a power cord arrangement structure, and an object of the present invention is to provide a power cord arrangement structure that suppresses deterioration of the power cord. [Solution] When the power cord 5 is pulled in the left-right direction, the portion of the power cord 5 having the bushing 6 bends gradually and greatly from the retaining plate portion 9 toward the opening edge of the main body case 1, and when the power cord 5 is pulled to one side in the left-right direction, the distance between the portion of the power cord 5 or bushing 6 that comes into contact with the opening edge of the main body case 1 in the cord holding part 3 and the retaining plate portion 9 is longer than the distance between the portion of the power cord 5 or bushing 6 that comes into contact with the opening edge of the main body case 1 in the cord holding part 3 and the retaining plate portion 9 when the power cord 5 is pulled to the other side in the left-right direction.

Description

[Technical Field]

[0001] The present invention relates to a power cord arrangement structure for use in electrical equipment and the like. [Background technology]

[0002] Conventionally, electrical equipment has a power cord that is pulled out to the outside through an opening in the main body case and has a plug at one end, and this power cord has a bushing that is held in a holder provided in the opening (note that a related prior document is Patent Document 1 listed below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-158225 Summary of the Invention [Problem to be solved by the invention]

[0004] In such conventional electrical devices, for example, when the power cord is connected to a power outlet, the power cord may be pulled in a direction that intersects with the opening direction of the opening of the main body case, or in a left-right direction. In such cases, the power cord that is pulled out from the opening hits the edge of the opening of the main body case and bends. If the power cord hits the edge of the opening of the main body case in the same position, the copper wire of the power cord will suffer from metal fatigue, accelerating the deterioration of the power cord.

[0005] SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and has an object to provide a power cord installation structure that suppresses deterioration of the power cord. [Means for solving the problem]

[0006] In order to achieve this object, the present invention provides a power cord arrangement structure for an electrical appliance, comprising: a cord holder provided at an opening of a main body case; and a power cord having a plug at one end and drawn out to the outside through an insertion hole of the cord holder, the power cord having a bushing held in the insertion hole of the cord holder, the cord holder having a cylindrical tube portion extending from an opening edge of the opening of the main body case toward the inside of the main body case, and a retaining plate portion having the insertion hole and provided so as to close the inside side of the main body case in the direction of the central axis of the tube portion, the central axis of the insertion hole extending laterally, and when viewed from the direction of the central axis of the insertion hole, the central axis of the insertion hole extends laterally, and the left and right directions of the central axis of the insertion hole and the tube portion of the cord holder are different from each other. the distance between the power cord and one side in the left-right direction is greater than the distance between the center axis of the insertion hole and the other side in the left-right direction of the cord holder, and when the power cord is pulled in the left-right direction, the portion of the power cord having the bushing bends gradually more significantly from the retaining plate portion toward the edge of the opening of the main body case, and when the power cord is pulled to one side in the left-right direction, the distance between the portion of the cord holder where the power cord or the bushing comes into contact with the edge of the opening of the main body case and the retaining plate portion is greater than the distance between the portion of the cord holder where the power cord or the bushing comes into contact with the edge of the opening of the main body case and the retaining plate portion when the power cord is pulled to the other side in the left-right direction. [Effects of the Invention]

[0007] As described above, according to the present invention, deterioration of the power cord can be suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an appearance of an electrical device according to a first embodiment of the present invention; [Figure 2] Cross-sectional view of the opening of the electrical device [Figure 3] FIG. 10 is a perspective view of the cord holding part and the power cord of the electrical device. [Figure 4] Exploded view of the electrical equipment [Figure 5] Exploded view of the cord retainer and power cord of the same electrical device [Figure 6] Cross-sectional view of the opening of the electrical device [Figure 7] Cross-sectional view of the opening of the electrical device [Figure 8] Cross-sectional view of the opening of the electrical device [Figure 9] FIG. 10 is a perspective view of a cord holder and a power cord of an electric device according to a second embodiment of the present invention; [Figure 10] Cross-sectional view of the opening of the electrical device [Figure 11] Cross-sectional view of the opening of the electrical device [Figure 12] Cross-sectional view of the opening of the electrical device DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] (Embodiment 1) Fig. 1 is a perspective view of the appearance of an electric device according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of an opening of the electric device according to an embodiment of the present invention. Fig. 3 is a perspective view of a cord holder and a power cord of the electric device according to an embodiment of the present invention.

[0011] 1, 2, and 3, the main body case 1 of the electrical device is box-shaped, with a smaller front-to-rear dimension than its left-to-right dimension. An air conditioning unit (not shown) is housed within the main body case 1. The main body case 1 has a substantially rectangular opening 2 at the bottom of one of its left-to-right sides. A power cord 5 electrically connected to the air conditioning unit extends to the outside of the main body case 1 through the opening 2. The power cord 5 has a bushing 6 at its base that is fitted onto the power cord 5 and covers it, and a plug (not shown) at its tip that can be connected to an electrical outlet. The bushing 6 is substantially cylindrical, and the power cord 5 fits into the opening of the bushing 6. A cord holder 3 that holds the bushing 6 of the power cord 5 is fixed to the opening 2. The cord holder 3 is disposed between the bushing 6 of the power cord 5 and the opening 2 of the main body case 1.

[0012] The cord holder 3 includes a tubular portion 7 , a fixing portion 8 , and a holding plate portion 9 .

[0013] The tubular portion 7 is cylindrical and extends from the opening edge 13 of the opening 2, which is a hole in the casing 1, toward the inside of the casing 1. The tubular portion 7 is a generally rectangular tubular shape with a central axis extending horizontally, and the opening area gradually increases from one side in the central axis direction (the left side in FIG. 2, inside the casing 1) to the other side (the right side in FIG. 2, the opening edge side). The tubular portion 7 has a holding plate portion 9 on one side in the central axis direction (the left side in FIG. 2, inside the casing 1) and a fixing portion 8 on the other side in the central axis direction (the right side in FIG. 2, the opening edge side).

[0014] The fixing part 8 is made up of a first ring part 10 and a second ring part 11, which are annular ribs extending outward from the outer surface of the tubular part 7. The first ring part 10 is arranged at the end on the other side (the right side in FIG. 2) in the central axis direction of the tubular part 7, and the second ring part 11 is arranged on one side (the left side in FIG. 2) of the first ring part 10 in the central axis direction of the tubular part 7. A gap 12 is formed between the first ring part 10 and the second ring part 11. An opening edge 13 of the opening 2 of the main body case 1 fits into this gap 12, and the cord holding part 3 is fixed to the main body case 1. The first ring part 10 of the fixing part 8 comes into contact with the outer surface of the main body case 1, and the second ring part 11 comes into contact with the inner surface of the main body case 1. contact with the surface.

[0015] The retaining plate portion 9 is a generally flat plate having a generally rectangular insertion hole 4 in the center. The retaining plate portion 9 is provided so as to cover the opening on one side in the central axis direction of the tubular portion 7. The outer surface of the cylindrical bushing 6 is provided with a groove 6a extending in the circumferential direction. The opening edge of the insertion hole 4 fits into this annular groove 6a, and the bushing 6 with the power cord 5 inside is fixed to the cord retaining part 3. The shape of the plane perpendicular to the central axis direction of the power cord 5 is fixed so as to be vertically elongated.

[0016] The tubular portion 7, fixing portion 8, and holding plate portion 9 are integrally molded from a resin material. The fixing portion 8 of the cord holder 3 is fixed to the opening edge 13 of the opening 2 of the main case 1, the tubular portion 7 of the cord holder 3 extends from the fixing portion 8 inward of the main case 1, and the holding plate portion 9 of the cord holder 3 is disposed inside the main case 1. The main case 1 is also a component molded from a resin material.

[0017] Fig. 4 is an exploded view of the electrical device according to the embodiment of the present invention, and Fig. 5 is an exploded view of the cord holder and the power cord of the electrical device according to the embodiment of the present invention.

[0018] 4 and 5, the main body case 1 has a rear main body case 1A and a front main body case 1B.

[0019] Rear case 1A is the rear side that divides case 1 into two halves between the front and rear sides of case 1. Front case 1B is the front side that divides case 1 into two halves between the front and rear sides of case 1.

[0020] The opening 2 consists of a rear opening 2A, which is a roughly vertically elongated rectangular notch provided at the bottom of one side surface of the rear main body case 1A in the left-right direction of the main body case 1, and a front opening 2B, which is a roughly vertically elongated rectangular notch provided at the bottom of one side surface of the front main body case 1B in the left-right direction of the main body case 1.

[0021] In this way, the main body case 1 is box-shaped, and the opening 2 is divided into a rear main body case 1A and a front main body case 1B, and is configured to be separable into a rear opening 2A and a front opening 2B. This makes it easier to fit the gap 12 of the fixing part 8 of the cord holder 3 into the opening edges of the rear opening 2A and the front opening 2B.

[0022] The cord holder 3 also includes a rear cord holder 3A and a front cord holder 3B. The rear cord holder 3A and the front cord holder 3B are formed by dividing the cord holder 3 into two parts by a vertical plane including the central axis of the tubular portion 7.

[0023] The rear cord holding component 3A has a rear tubular portion 7A, a rear fixing portion 8A, a rear holding plate portion (not shown), and a rear insertion hole (not shown). The rear fixing portion 8A of the rear cord holding component 3A fits into a rear opening 2A, which is a cutout in the rear main body case 1A.

[0024] Similarly, the front cord holder 3B has a front tubular portion 7B, a front fixing portion 8B, a front holding plate portion 9B, and a front insertion hole 4B. The front fixing portion 8B of the front cord holder 3B fits into a front opening 2B, which is a cutout in the front main body case 1B. This makes it easier to fit the groove 6a of the bushing 6 into the opening edges of the rear insertion hole (not shown) and the front insertion hole 4B. Note that, although the main body case 1 and the cord holder 3 are divided into front and rear portions in this invention, similar effects can be achieved by dividing them into top and bottom or left and right portions.

[0025] Fig. 6 is a cross-sectional view of an opening of an electrical device according to an embodiment of the present invention, showing the power cord 5 viewed from above with the center of the power cord 5 aligned with the central axis of the insertion hole 4. Fig. 7 is a cross-sectional view of an opening of an electrical device according to an embodiment of the present invention, showing the power cord's central axis as indicated by the dotted line, with the power cord 5 pulled to one side in the left-right direction as viewed from above. Fig. 8 is a cross-sectional view of an opening of an electrical device according to an embodiment of the present invention, showing the power cord's central axis as indicated by the dotted line, with the power cord 5 pulled to the other side in the left-right direction as viewed from above.

[0026] 6, 7, and 8, the external dimensions of bushing 6 become smaller from the retaining plate portion 9 toward the fixed portion 8 (opening edge 13 of main body case 1). When power cord 5 is pulled in the left-right direction, the portion of power cord 5 having bushing 6 bends gradually more as it moves from the retaining plate portion 9 toward the fixed portion 8 (opening edge 13 of main body case 1).

[0027] The central axis of the insertion hole 4 extends horizontally, and when viewed from the direction of the central axis of the insertion hole 4, the distance between the central axis of the insertion hole 4 and one side of the tubular portion of the cord holding component 3 in the left-right direction is greater than the distance between the central axis of the insertion hole 4 and the other side of the cord holding component 3 in the left-right direction.

[0028] In the above configuration, when power cord 5 is pulled to one side in the left-right direction (see FIG. 7), the distance between the part where power cord 5 or bushing 6 comes into contact with fixed part 8 (opening edge 13 of main body case 1) of cord holder 3 and holding plate part 9 is longer than the distance between the part where power cord 5 or bushing 6 comes into contact with fixed part 8 (opening edge 13 of main body case 1) of cord holder 3 and holding plate part 9 when power cord 5 is pulled to the other side in the left-right direction (see FIG. 8). As a result, the part where power cord 5 bends when pulled to one side in the left-right direction is different from the part where power cord 5 bends when pulled to the other side in the left-right direction, reducing metal fatigue of the copper wire in power cord 5 and improving the durability of power cord 5.

[0029] Furthermore, when viewed from the direction of the central axis of the insertion hole 4, the distance between the central axis of the insertion hole 4 and one side of the cord holder 3 in the left-right direction is shorter than the distance between the part of the cord holder 3 where the power cord 5 or bushing 6 comes into contact with the fixing part 8 (opening edge 13 of the main body case 1) and the holding plate part 9 when the power cord 5 is pulled in the left-right direction. This makes it possible to prevent the part of the power cord 5 having the bushing 6 from bending significantly when the power cord 5 is pulled in the left-right direction.

[0030] Furthermore, when the power cord 5 is pulled to one side in the left-right direction, the power cord 5 hits the fixing portion 8 of the cord holder 3 (the edge 13 of the opening of the main body case 1), and when the power cord 5 is pulled to the other side in the left-right direction, the bushing 6 hits the fixing portion 8 of the cord holder 3 (the edge 13 of the opening of the main body case 1). That is, when the power cord 5 is pulled to one side in the left-right direction and the power cord 5 hits the fixing portion 8 of the cord holder 3 (the edge 13 of the opening of the main body case 1), the portion of the power cord 5 that hits the fixing portion 8 of the cord holder 3 (the edge 13 of the opening of the main body case 1) bends the most. On the other hand, when the power cord 5 is pulled to the other side in the left-right direction and the bushing 6 hits the fixing portion 8 of the cord holder 3 (the edge 13 of the opening of the main body case 1), the tip portion of the power cord 5 at the bushing 6 bends the most. As a result, the part where the power cord 5 bends most when pulled to one side in the left-right direction is different from the part where the power cord 5 bends most when pulled to the other side in the left-right direction, reducing metal fatigue of the copper wire in the power cord 5 and improving the durability of the power cord 5.

[0031] (Embodiment 2) FIG. 9 is a perspective view of a cord holder and a power cord of an electrical device according to a second embodiment of the present invention. FIG. 10 is a cross-sectional view of an opening of the electrical device according to the second embodiment of the present invention, showing the power cord 5 from the side with the center of the power cord 5 aligned with the central axis of the insertion hole 4. FIG. 11 is a cross-sectional view of an opening of the electrical device according to the second embodiment of the present invention, showing the dotted line indicating the central axis of the power cord, with the power cord 5 viewed from the side and pulled to one side in the vertical direction. FIG. 12 is a cross-sectional view of an opening of the electrical device according to the second embodiment of the present invention, showing the dotted line indicating the central axis of the power cord, with the power cord 5 viewed from the side and pulled to the other side in the vertical direction. The same components as those in the first embodiment are designated by the same reference numerals, and detailed descriptions thereof will be omitted.

[0032] 9, 10, 11, and 12, the difference from the first embodiment is the vertical position of the substantially rectangular insertion hole 24 on the holding plate portion 9. In other words, it is the vertical distance between the power cord 5 and the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holding component 3.

[0033] In the above configuration, when power cord 5 is pulled in one direction in the vertical direction (see FIG. 11), the distance between the part where power cord 5 or bushing 6 comes into contact with fixed part 8 (opening edge 13 of main body case 1) of cord holder 3 and holding plate part 9 is longer than the distance between the part where power cord 5 or bushing 6 comes into contact with fixed part 8 (opening edge 13 of main body case 1) of cord holder 3 and holding plate part 9 when power cord 5 is pulled in the other direction in the vertical direction (see FIG. 12). As a result, the part where power cord 5 bends when power cord 5 is pulled in one direction in the vertical direction is different from the part where power cord 5 bends when power cord 5 is pulled in the other direction in the vertical direction, reducing metal fatigue of the copper wire in power cord 5 and improving the durability of power cord 5.

[0034] Furthermore, when the power cord 5 is pulled to one side in the vertical direction, the distance between the portion of the power cord 5 or bushing 6 that comes into contact with the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holder 3 and the holding plate portion 9 is different from ...

[0035] Furthermore, when viewed from the direction of the central axis of the insertion hole 4, the distance between the central axis of the insertion hole 4 and one side of the cord holder 3 in the vertical direction is shorter than the distance between the part of the cord holder 3 where the power cord 5 or bushing 6 comes into contact with the fixing part 8 (opening edge 13 of the main body case 1) and the holding plate part 9 when the power cord 5 is pulled in the vertical direction. This makes it possible to prevent the part of the power cord 5 having the bushing 6 from bending significantly when the power cord 5 is pulled in the vertical direction.

[0036] Furthermore, when the power cord 5 is pulled to one side in the vertical direction, the power cord 5 hits the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holder 3, and when the power cord 5 is pulled to the other side in the vertical direction, the bushing 6 hits the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holder 3. In other words, when the power cord 5 is pulled to one side in the vertical direction and the power cord 5 hits the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holder 3, the bushing 6 hits the fixing portion 8 (opening edge 13 of the main body case 1) of the cord holder 3. When power cord 5 is pulled to the other side in the vertical direction and bushing 6 hits fixing portion 8 of cord holder 3 (opening edge 13 of main case 1), the tip of bushing 6 in power cord 5 bends the most. As a result, the point at which power cord 5 bends the most when power cord 5 is pulled to one side in the vertical direction is different from the point at which power cord 5 bends the most when power cord 5 is pulled to the other side in the vertical direction, reducing metal fatigue of the copper wire in power cord 5 and improving the durability of power cord 5. [Industrial Applicability]

[0037] The power cord arrangement structure according to the present invention is useful for electrical equipment and the like as a power cord outlet structure that enables improvement in the durability of the power cord. [Explanation of symbols]

[0038] 1 Main unit case 1A Rear body case 1B Front body case 2 Opening 2A Rear opening 2B Front opening 3 Cord retaining parts 3A Rear Cord Retainer 3B Front cord retainer 4 Insertion hole 4B Front insertion hole 5 Power cord 6 Bushings 6a groove 7 Cylinder part 7A Rear cylinder part 7B Front cylinder part 8 Fixed part 8A Rear fixation part 8B Front fixation part 9 Holding plate part 9B Front holding plate part 10 First ring portion 11 Second ring moiety 12 Gap 13 Opening edge 24 Insertion hole

Claims

1. A power cord arrangement structure for an electrical appliance, a cord holding part provided at an opening of the main body case; a power cord that is drawn out to the outside through the insertion hole of the cord holding part and has a plug at one end, The power cord is a bushing that is held in the insertion hole of the cord holding component; The cord holding component is a cylindrical portion extending inward from an edge of the opening of the main body case; a holding plate portion provided to close an inner side of the main body case in a central axis direction of the cylindrical portion and having the insertion hole, The central axis of the insertion hole extends in the horizontal direction, When viewed from the direction of the central axis of the insertion hole, a distance between the central axis of the insertion hole and one side of the tubular portion of the cord holder in the left-right direction is larger than a distance between the central axis of the insertion hole and the other side of the cord holder in the left-right direction, When the power cord is pulled in the left-right direction, the portion of the power cord having the bushing bends gradually and significantly from the holding plate portion toward the opening edge of the main body case, When the power cord is pulled to one side in the left-right direction, the distance between the portion of the cord holder where the power cord or the bushing abuts on the opening edge of the main body case and the holding plate portion is: A power cord arrangement structure characterized in that, when the power cord is pulled to the other side in the left-right direction, the power cord or the bushing becomes longer than the distance between the part of the cord holding component that contacts the opening edge side of the main body case and the holding plate part.

2. When viewed from the direction of the central axis of the insertion hole, the distance between the central axis of the insertion hole and one side of the cord holder in the left-right direction is:

2. The power cord arrangement structure according to claim 1, wherein when the power cord is pulled to the other side in the left-right direction, the power cord or the bushing becomes shorter than the distance between the part of the cord holding component that abuts on the opening edge side of the main case and the holding plate part.

3. When the power cord is pulled to one side in the left-right direction, the power cord abuts against the opening edge of the main body case in the cord holder, 3. The power cord arrangement structure according to claim 1, wherein when the power cord is pulled to the other side in the left-right direction, the bushing abuts against the edge of the opening of the main body case in the cord holder.

4. When the power cord is pulled to one side in the vertical direction, the distance between the portion of the cord holder where the power cord or the bushing abuts on the edge of the opening of the main body case and the holding plate portion is: A power cord arrangement structure characterized in that, when the power cord is pulled to the other side in the vertical direction, the power cord or the bushing becomes longer than the distance between the part of the cord holding component that contacts the opening edge side of the main body case and the holding plate part.

5. When viewed from the direction of the central axis of the insertion hole, the distance between the central axis of the insertion hole and the lower side of the cord holder in the vertical direction is: When the power cord is pulled upward in the vertical direction, the power cord or the bushing contacts the portion of the cord holding component that contacts the edge of the opening of the main body case and the holding plate portion.

5. The power cord arrangement structure according to claim 4, wherein the distance between the power cord and the power supply is shorter than the distance between the power cord and the power supply.

6. When the power cord is pulled upward in the vertical direction, the power cord contacts the opening edge of the main body case in the cord holder, 6. The power cord arrangement structure according to claim 4, wherein when the power cord is pulled downward in the vertical direction, the bushing abuts against the edge of the opening of the main body case in the cord holding part.

Images