Wiring structure in equipment

Abstract

This invention provides a cable routing structure for equipment that allows for the routing of cables with the same cable diameter in a smaller cut-out area than when formed into a rectangular plate shape, and consequently, is less prone to shrinkage during molding. [Solution] Since the cut portions 20A and 20B are formed into an isosceles triangle shape with the rear edge of the left plate 14 as the base, the area of ​​the cut portion 20A required for the diameter of the cable to be routed can be reduced compared to the conventional method of forming the cut portion into a rectangular plate shape. Therefore, the appearance when the cut portion 20A is cut out is less likely to be unsightly. In addition, since a groove 23 is engraved within the cut portion 20A from the rear edge of the left plate 14 to the apex of the cut portion 20A, by first making an incision along the groove 23 when cutting, it is possible to prevent cracks from occurring starting from the apex of the cut portion 20A.

Description

Technical Field

[0001] The present invention relates to a wire passing structure provided, for example, on a decorative cover of a collective entrance machine.

Background Art

[0002] Conventionally, for example, devices such as collective entrance machines may be provided with a wire passing structure for drawing in various cables. And, as one of the general structures for such a wire passing structure, there is a structure in which a cut-out portion (so-called knockout) that can be cut out as necessary is provided in a cover member or a case member constituting the device. For example, in the wire passing structure described in Patent Document 1, a rectangular plate-shaped cut-out portion is provided at the edge of the cover member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the cut-out portion is formed into a rectangular plate shape, the area of the cut-out portion required for the diameter of the cable to be passed through tends to be large. Therefore, there is a problem that the appearance when the cut-out portion is cut out tends to be poor. Also, when trying to make the cut-out portion thinner than the surroundings to make it easier to cut out, there is a problem that sink marks are likely to occur during molding.

[0005] Therefore, the present invention has been made in view of the above problems, and it is possible to pass a cable having the same cable diameter with a cut-out portion having a smaller area than when formed into a rectangular plate shape, and thus to provide a wire passing structure in a device in which sink marks are less likely to occur during molding.

Means for Solving the Problems

[0006] To achieve the above objective, the invention described in claim 1 of the present invention is a wire routing structure for a device in which a box-shaped synthetic resin member opening at the rear surface is provided with a cut-out portion on its circumferential surface, and a wire routing opening can be formed by cutting out the cut-out portion, wherein the cut-out portion is formed in a triangular shape with the edge of the opening as one side, and a groove is carved within the cut-out portion from the edge to the apex of the cut-out portion. According to the invention described in claim 1, since the cut portion is formed in a triangular shape with the edge of the opening as one side, the area of ​​the cut portion required relative to the diameter of the cable to be routed can be reduced compared to the conventional case where the cut portion is formed in a rectangular plate shape, and the appearance when the cut portion is cut out is less likely to be poor. Furthermore, even if the cut portion is formed thinner than the surrounding area, shrinkage is less likely to occur during molding because the cut portion is relatively small. Furthermore, according to the invention described in claim 1, since a groove is carved within the cut portion from the edge to the apex of the cut portion, when cutting out the cut portion, it is possible to prevent cracks from forming starting from the apex of the cut portion by first making an incision along the groove.

[0007] The invention described in claim 2 is characterized in that, in the invention described in claim 1, the cut portion has a triangular first cut portion and a second cut portion provided within the first cut portion, the second cut portion is formed in a triangular shape with the same edge as the first cut portion as one side and its vertex located behind the vertex of the first cut portion, and further, a groove extends from the edge through the vertex of the second cut portion to the vertex of the first cut portion. According to the invention described in claim 2, the cut-off portion is provided with a triangular first cut-off portion and a second cut-off portion provided within the first cut-off portion. The second cut-off portion is formed into a triangular shape with the same edge as the first cut-off portion as one side, and its vertex located behind the vertex of the first cut-off portion. Furthermore, a groove is carved from the edge, passing through the vertex of the second cut-off portion to the vertex of the first cut-off portion. Therefore, the size of the opening for cable passage can be adjusted according to the diameter of the cable to be passed through, further preventing deterioration of appearance and rationalizing the structure of the cut-off portion.

[0008] The invention described in claim 3 is characterized in that, in the invention described in claim 2, the second cut portion is thinner than the first cut portion, and a step difference due to the difference in thickness is formed along the edge of the second cut portion within the first cut portion. According to the invention described in claim 3, the second cut portion is thinner than the first cut portion, and a step is formed along the edge of the second cut portion within the first cut portion due to the difference in thickness. Therefore, when cutting only the second cut portion, the step acts as a guide for making the cut, thereby simplifying the cutting work. [Effects of the Invention]

[0009] According to the present invention, since the cut portion is formed in a triangular shape with the edge of the opening as one side, the area of ​​the cut portion required relative to the diameter of the cable to be routed can be reduced compared to the conventional method of forming the cut portion in a rectangular plate shape, and the appearance when the cut portion is removed is less likely to be poor. Furthermore, even if the cut portion is formed thinner than the surrounding area, shrinkage is less likely to occur during molding because the cut portion is relatively small. Furthermore, because a groove is carved within the excised area, from the edge to the apex, when cutting out the excised area, it is possible to prevent cracks from forming starting from the apex of the excised area by first making an incision along the groove. [Brief explanation of the drawing]

[0010] [Figure 1] This is an explanatory diagram showing the main entrance panel from the front. [Figure 2] This is an explanatory diagram showing the main entrance panel from the rear. [Figure 3] This is a perspective view diagram showing the unit disassembled into a decorative cover and the main unit of the entrance door, viewed from the front. [Figure 4] This is a perspective view diagram showing the unit disassembled into a decorative cover and the main unit of the entrance door, viewed from the rear. [Figure 5] This is a perspective view diagram showing a magnified view of the cut section of the left side plate. [Figure 6] This is an explanatory diagram showing a magnified view of the cut section of the left side plate from the side. [Figure 7] This is an explanatory diagram showing a magnified view of the cut section of the left side panel from the rear. [Figure 8] (a) is an explanatory diagram showing the state after the second cut section has been cut out to create an opening for wiring, and (b) is an explanatory diagram showing the state after the entire cut section has been cut out to create an opening for wiring. [Modes for carrying out the invention]

[0011] The following describes in detail, based on the drawings, the wiring structure for a multi-unit entrance unit, which is one embodiment of the present invention.

[0012] Figure 1 is an explanatory diagram showing the main entrance unit 1 from the front. Figure 2 is an explanatory diagram showing the main entrance unit 1 from the rear. Figure 3 is a perspective explanatory diagram showing the unit disassembled into the decorative cover 4 and the main entrance unit body 2 from the front. Figure 4 is a perspective explanatory diagram showing the unit disassembled into the decorative cover 4 and the main entrance unit body 2 from the rear. Figure 5 is a perspective explanatory diagram showing an enlarged view of the cut-out portion 20A of the left side plate 14. Figure 6 is an explanatory diagram showing an enlarged view of the cut-out portion 20A of the left side plate 14 from the side. Figure 7 is an explanatory diagram showing an enlarged view of the cut-out portion 20A of the left side plate 14 from the rear. Figure 8(a) is an explanatory diagram showing the state in which the second cut-out portion 22 has been cut out to create a wiring opening 24A, and Figure 8(b) is an explanatory diagram showing the state in which the entire cut-out portion 20A has been cut out to create a wiring opening 24B.

[0013] The collective entrance unit 1 is installed on the wall of the main entrance of an apartment building as part of a so-called apartment building intercom system. It comprises an entrance unit body 2 equipped with a display / operation unit 3 that also functions as a touch panel, and a decorative cover 4 made of synthetic resin that is attached to the entrance unit body 2 with the display / operation unit 3 exposed. The front of the entrance unit body 2 is equipped with a microphone unit 5 and a speaker unit 6 for communication, as well as a camera unit 7 for capturing images of the area in front. When a visitor operates the display / operation unit 3 to specify the apartment unit to call and makes a call, the collective entrance unit 1 calls the corresponding apartment unit's intercom master unit (not shown) and activates the camera unit 7 to photograph the visitor.

[0014] Here, we will describe the decorative cover 4 provided with the wiring structure of the collective entrance unit 1 according to the present invention. The decorative cover 4 is integrally formed into a box shape with an opening at the rear, comprising a roughly rectangular front panel 11, an upper panel 12 extending rearward from the upper edge of the front panel 11, a lower panel 13 extending rearward from the lower edge of the front panel 11, a left panel 14 extending rearward from the left edge of the front panel 11, and a right panel 15 extending rearward from the right edge of the front panel 11. A large opening 16 is provided in the approximate center of the front panel 11 to expose the display / operation unit 3 of the entrance unit body 2. Cutouts constituting a wiring structure are provided on the inner surfaces of the left panel 14 and the right panel 15, respectively. The cutout on the left panel 14 is referred to as cutout 20A, and the cutout on the right panel 15 is referred to as cutout 20B.

[0015] The cutting portion 20A has a first cutout portion 21 formed in an isosceles triangle shape with the rear edge of the left side plate 14 as the base in a side view, and a second cutout portion 22 provided within the first cutout portion 21. The second cutout portion 22 is formed in an isosceles triangle shape having the same base as the first cutout portion 21 and a vertex located rearward (i.e., closer to the base) than the vertex of the first cutout portion 21. And the cutting portion 20A is formed as a concave portion that recesses the inner surface of the left side plate 14 outward, and is thinner than the surrounding area. Also, the second cutout portion 22 is thinner than the first cutout portion 21, and a step due to a difference in thickness in the left - right direction is formed along the isosceles side of the second cutout portion 22. Further, a groove 23 extending in the front - rear direction is engraved from the base of the cutting portion 20A, that is, from the edge of the left side plate 14 to the vertex of the first cutout portion 21. This groove 23 reaches from the edge of the left side plate 14 through the vertex of the second cutout portion 22 to the vertex of the first cutout portion 21.

[0016] On the other hand, the cutting portion 20B is configured in the same manner as the cutting portion 20A on the inner surface of the right side plate 15. That is, it has two cutout portions: a first cutout portion 21 with the rear edge of the right side plate 15 as the base, and a second cutout portion 22 provided within the first cutout portion 21. Also, the cutting portion 20B is thinner than the surrounding area, and the second cutout portion 22 is thinner than the first cutout portion 21. Further, a similar groove 23 is also engraved in the cutting portion 20B.

[0017] And, for example, when an antenna wire for wireless communication with an external server device needs to be connected to the entrance machine main body 2, it is necessary to pass a cable across the inside and outside of the decorative cover 4. Therefore, in such a case, depending on the cable passing position and the cable diameter, by cutting the second cutout portion 22 or the first cutout portion 21 of the cutting portions 20A and 20B, a cable - passing opening 24A or a cable - passing opening 24B is opened in the left side plate 14 or the right side plate 15 of the decorative cover 4 to cope with it.

[0018] In other words, for example, when routing an antenna wire of a typical cable diameter, as shown in Figure 8(a), only the second cut section 22 should be cut from the cut section 20A (or cut section 20B) to create a wire routing opening 24A. The procedure for creating this opening is as follows: First, a cut is made along the groove 23 from the edge of the left plate 14 (or right plate 15) to the top of the second cut section 22. Next, a cut is made along the step between the first cut section 21 and the second cut section 22 from the edge of the left plate 14 (or right plate 15) to the top of the second cut section 22, so that only the second cut section 22 is cut out, creating a relatively small wire routing opening 24A.

[0019] Furthermore, when routing antenna wires or power cables with a larger diameter than typical antenna wires, the entire cut section 20A (or cut section 20B) can be cut out to create a cable routing opening 24B, as shown in Figure 8(b). The procedure for creating this opening is as follows: First, a cut is made along the groove 23, from the edge of the left plate 14 (or right plate 15), past the apex of the second cut section 22, to the apex of the first cut section 21. Next, a cut is made along the equilateral sides of the first cut section 21, from the edge of the left plate 14 (or right plate 15), to the apex of the first cut section 21. This cuts out the entire cut section 20A, i.e., the first cut section 21 including the second cut section 22, creating a cable routing opening 24B that is larger than the cable routing opening 24A. For cutting in the cut sections 20A and 20B, general tools such as wire cutters can be used.

[0020] With the wiring structure of the multi-unit entrance unit 1 having the above configuration, the cut-out sections 20A and 20B are formed into isosceles triangles with the rear edges of the left plate 14 and right plate 15 as the base. Therefore, compared to the conventional method of forming the cut-out sections into a rectangular plate shape, the area of ​​the cut-out sections 20A and 20B required for the diameter of the cable to be routed can be reduced. Consequently, the appearance after cutting out the cut-out sections 20A and 20B is less likely to be poor. In addition, although the cut-out sections 20A and 20B are formed to be thinner than the surrounding area, because the cut-out sections 20A and 20B are relatively small, sink marks are less likely to occur when molding the decorative cover 4.

[0021] Furthermore, because the cut portions 20A and 20B are shaped into a triangular form, there is a risk that cracks may occur starting from the apex of the cut portions 20A and 20B when cutting them. However, with the above-described wiring structure, a groove 23 is carved into the cut portions 20A and 20B, extending from the rear edge of the left plate 14 or the right plate 15 to the apex of the cut portions 20A and 20B. Therefore, by first making an incision along the groove 23 when cutting, it is possible to prevent cracks from occurring starting from the apex of the cut portions 20A and 20B.

[0022] Furthermore, the cut sections 20A and 20B are provided as an isosceles triangular first cut section 21 and a second cut section 22 provided within the first cut section 21. The second cut section 22 is formed as an isosceles triangle with the same edge as the first cut section 21 as its base, and its vertex located behind the vertex of the first cut section 21. In addition, a groove 23 is carved from the rear edge of the left plate 14 or the right plate 15, through the vertex of the second cut section 22, to the vertex of the first cut section 21. Therefore, the size of the cable passage openings 24A and 24B can be adjusted according to the diameter of the cable to be passed through, further preventing deterioration of appearance and streamlining the structure related to the cut sections 20A and 20B.

[0023] In addition, the second cut section 22 is made thinner than the first cut section 21, so that a step is formed along the equal sides of the second cut section 22 within the first cut section 21 due to the difference in thickness. Therefore, when cutting only the second cut section 22, the step acts as a guide for making the cut, thereby simplifying the cutting process.

[0024] Furthermore, the wiring structure of the device according to the present invention can be modified as necessary, without departing from the spirit of the present invention, not only in terms of the overall configuration of the device but also in terms of the configuration related to the cutting section, etc.

[0025] For example, in the above embodiment, one cutout is provided on the left and right panels of the decorative cover, but two or more cutouts may be provided, or cutouts may be provided on the top and bottom panels. The position and number of cutouts can be appropriately designed according to the shape of the synthetic resin member, etc. Furthermore, although a second cutout section is provided within the first cutout section in the above embodiment, the second cutout section may be omitted, or the second cutout section may be formed into a rectangular shape as in the conventional design. The presence or absence and shape of the second cutout section can also be modified as appropriate.

[0026] Furthermore, although the above embodiment describes a wiring structure provided in a decorative cover, the present invention can also be suitably adopted as a wiring structure for a casing member constituting the main body of the entrance unit. In addition, this invention can be suitably adopted not only for intercom equipment other than the main entrance unit, but also for wiring structures for other types of equipment, such as boxes in which electrical equipment is installed. [Explanation of Symbols]

[0027] 1. Multi-unit entrance panel (equipment), 4. Decorative cover (synthetic resin component), 14. Left side panel (circumferential surface), 15. Right side panel (circumferential surface), 20A, 20B. Cut-out section, 21. First cut-out section, 22. Second cut-out section, 23. Groove, 24A, 24B. Wiring opening.

Claims

1. A wiring structure in a device in which a box-shaped synthetic resin member with an opening on the rear surface is provided with a cut-off portion on its circumferential surface, and a wiring opening for wiring can be formed by cutting off the cut-off portion, The excised portion is shaped into a triangular form with the edge of the opening as one side, A wire routing structure in a device characterized in that a groove is carved within the cut-out portion, extending from the edge to the apex of the cut-out portion.

2. The excision portion has a triangular first excision portion and a second excision portion provided within the first excision portion, The second cut portion is formed in a triangular shape, with the same edge as the first cut portion as one side, and its vertex located behind the vertex of the first cut portion. Furthermore, the wire routing structure in the device according to claim 1 is characterized in that the groove extends from the edge through the apex of the second cutout to the apex of the first cutout.

3. The second cut portion is thinner than the first cut portion. The wire routing structure in the device according to claim 2, characterized in that a step difference due to a difference in thickness is formed along the edge of the second cut portion within the first cut portion.

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