Electrical distribution box

Abstract

Electrical distribution box (1) which is configured to accommodate an electrical device (12) and which is configured to connect several external devices (E1) to each other via the accommodated electrical device (12), wherein the electrical distribution box (1) comprises: a connector (11) having a tubular section (20) with an open end face and a projecting section (22) extending from a bottom wall (21) of the tubular section (20) away from the tubular section (20); a housing (10) for receiving the electrical device (12), wherein the housing (10) has an insertion opening (41) into which a section of the foreground section (22) is inserted, a tubular first cover section (42) projecting outwards from a circumferential edge section of the insertion opening (41) and covering the foreground section (22), and a second cover section (43) projecting from a section of a front end face of the first cover section (42) and covering the foreground section (22) or the tubular section (20), wherein a space is provided between the second cover section (43) and the foreground section (22) or the tubular section (20); and an adhesive element (3) which is provided between the forward section (22) of the connector (11) and the first cover section (42) of the housing (10) and adheres to the forward section (22) and the first cover section (42).

Description

TECHNICAL AREA

[0001] The present invention relates to an electrical distribution box. TECHNICAL BACKGROUND

[0002] Vehicles are often equipped with an electrical distribution box, which has a housing containing an electrical device and connects several vehicle-specific devices via the electrical device housed in the housing (see, for example, JP 2014-236621A). The housing has insertion openings into which a connector is inserted. Each vehicle-specific device is detachably connected by means of one of the connectors. The electrical device is connected to the vehicle-specific devices via the connectors. JP 2014-236621A discloses an electrical distribution box in which, for example, one vehicle-specific device supplies power to other vehicle-specific devices.

[0003] JP 2014-236621A is a state-of-the-art example.

[0004] US Patent 2002 / 0061666A1 discloses an electrical junction box comprising a top cover, a distribution board with a busbar, a wiring plate, and a bottom cover. The bottom cover has a through-hole through which a busbar terminal is inserted. The wiring plate has a through-hole through which the busbar terminal is inserted.

[0005] US Patent 2011 / 0094793A1 discloses a new electrical terminal block in which, even when multiple bolts are connected to external electrical cables, an external power supply cable from a jump starter can be securely connected to a target bolt, thus avoiding the problem of misconnection through a simple design. A test wall for coupling faults is provided around a generator terminal bolt. A jump-starting alligator clip can be connected to a battery terminal bolt.

[0006] US Patent 5,967,808 A discloses an electrical junction box whose main body has a first terminal, a receiving housing for the junction box that receives the main body, and an inclined cam groove. A connecting block for receiving a second connecting piece, which is connected to the first connecting piece, has a drive pin that slides into the cam groove. By inserting the main body of the junction box into the receiving housing of the junction box, the connecting block moves toward the main body of the junction box by means of the drive pin guided by the cam groove.In a further embodiment, a main body of a junction box has a first drive pin and a first group of connectors; a connector housing comprises a second group of connectors that engage with the first group of connectors and is provided with a second drive pin; and a receiving housing or holder for the junction box has a first cam groove connected to the first drive pin, a second cam groove connected to the second drive pin, and a clamping device for securing the main body of the junction box to the receiving housing or holder for the junction box, wherein the clamping device pulls the main body of the junction box against a wall of the housing and thereby pulls the connectors towards each other.

[0007] In the conventional electrical distribution box disclosed in JP 2014-236621A, an adhesive element is provided between the housing and each connector, the adhesive element adhering to both the housing and the connector, and the insertion opening being hermetically sealed by the connector and the adhesive element. This design prevents water from entering the housing through a gap between the housing and the connector.

[0008] Vehicles are used for travel in a wide variety of locations, and conventional electrical distribution boxes installed in vehicles can therefore be exposed to salt water. If salt water accumulates in the space between the housing, which is made of a metal such as aluminum, and the connectors, the metal corrodes, and a gap can form between the housing and the connectors. If a gap forms between the housing and the connectors, water can penetrate the housing through the gap and come into contact with the electrical equipment housed within, thereby damaging it. The more salt water accumulates between the housing and the connectors, the more easily the metal corrodes.

[0009] The present disclosure arose in light of the circumstances described above and is based on the objective of providing an electrical distribution box in which it is unlikely that water will accumulate in the space between a connector and a housing. This objective is achieved by the distribution box according to claim 1. OVERVIEW OF THE INVENTION

[0010] According to one aspect of the present invention, an electrical distribution box is configured to accommodate an electrical device and is configured to connect several external devices to each other via the accommodated electrical device, wherein the electrical distribution box comprises: a connector having a tubular section with an open end face and a projecting section extending from a bottom wall of the tubular section away from the tubular section;a housing for receiving the electrical device, the housing comprising an insertion opening into which a section of the preceding section is inserted, a tubular first cover section projecting outwards from a circumferential edge section of the insertion opening and covering the projecting section, and a second cover section projecting from a section of a front end face of the first cover section and covering the projecting section or the tubular section, wherein a space is provided between the second cover section and the projecting section or the tubular section; and an adhesive element provided between the projecting section of the connector and the first cover section of the housing, which adheres to the projecting section and the first cover section.

[0011] Based on the aspect described above, it is unlikely that water will accumulate in the space between the connector and the housing. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of a distribution box according to embodiment 1; Fig. Figure 2 is a block diagram illustrating the operation of the electrical distribution box; Fig. Figure 3 is a partial cross-sectional view of the electrical distribution box; Fig. Figure 4 is a front view of a connector; Fig. Figure 5 is a diagram illustrating the arrangement of a connector and an adhesive element; Fig. Figure 6 is an exterior view showing a section of a housing; Fig. 7 is a partial cross-sectional view of an electrical distribution box according to embodiment 2; and Fig. Figure 8 is a partial cross-sectional view of an electrical distribution box according to embodiment 3. FORMS OF EXECUTION OF THE INVENTION

[0012] First, aspects of the present disclosure are listed and described. Some of the embodiments described below can be combined in whole or in part as desired.

[0013] (1) An electrical distribution box according to one aspect of the present disclosure is an electrical distribution box in which an electrical device is housed and which connects several external devices to each other via the housed electrical device, wherein the electrical distribution box comprises: a connector having a tubular section with an open end face and a projecting section extending from a bottom wall of the tubular section away from the tubular section;a housing in which the electrical device is housed, the housing comprising an insertion opening into which a section of the foregoing section is inserted, a tubular first cover section projecting outwards from a circumferential edge section of the insertion opening and covering the foregoing section, and a second cover section projecting from a section of a front end face of the first cover section and covering the foregoing section or the tubular section, with a space provided between the second cover section and the foregoing section or the tubular section; and an adhesive element provided between the foregoing section of the connector and the first cover section of the housing, and adhering to the foregoing section and the first cover section.

[0014] The aspect described above assumes that the device is installed such that the second cover section is positioned on the top of the connector. In this case, the second cover section, projecting from the first, covers the top of the protruding section of the connector or the tubular section, leaving a gap between them. Therefore, it is unlikely that water will penetrate from the top of the second cover section into the space between the first cover section of the housing and the protruding section of the connector, and thus it is unlikely that water will accumulate in the space between the connector and the housing.

[0015] (2) In the electrical distribution box according to one aspect of the present disclosure, the connector has a second projecting section which projects from a side face of the projecting section or the tubular section, and a side face of the second projecting section is opposite the front end face of the first cover section of the housing, and the second cover section covers a front end face of the second projecting section.

[0016] As described above, a second projecting section is provided, and this second cover section covers the front end face of the second projecting section. Therefore, it is unlikely that water will penetrate from the upper surface of the second cover section and the tubular section into the space between the first cover section of the housing and the projecting section of the connector when the device is installed such that the second cover section is positioned on top of the connector.

[0017] (3) In the electrical distribution box according to one aspect of the present disclosure, two side sections of the second cover section are curved and lie opposite the connector.

[0018] As described above, two side sections of the second cover section are curved in such a way that they face the connector. Therefore, it is unlikely that water will penetrate from these two side sections of the second cover section into the space between the first cover section of the housing and the protruding section of the connector.

[0019] (4) In the electrical distribution box according to one aspect of the present disclosure, the adhesive element comprises: several adhesive sections which adhere to the foreground section and the first cover section; and a non-adhesive section which is connected to two of the several adhesive sections and is separate from the foreground section and the first cover section.

[0020] As described above, the adhesive element adheres to the housing and the connector in several sections, resulting in a more reliable prevention of water ingress into the housing. DETAILED EXAMPLES OF THE INVENTION

[0021] Specific examples of electrical distribution boxes according to the embodiments of the present disclosure are described below with reference to the drawings. It should be noted that the present invention is not limited to the following examples, the scope of protection of the present invention is specified by the appended claims, and all modifications that are equivalent to the claims in meaning and scope are to be considered as falling within the scope of protection of the present invention. Example 1

[0022] Fig. Figure 1 is a perspective view of an electrical distribution box 1 according to embodiment 1. The electrical distribution box 1 has a hollow, cuboid housing 10. Several connectors 11, 11... and 11 are provided on the right side of the housing 10. The multiple connectors 11, 11... and 11 are arranged side by side in a front-to-back direction. Fig. Figure 1 shows an example in which three connectors 11 are provided.

[0023] Fig. Figure 2 is a block diagram illustrating the operation of the electrical distribution box 1. The electrical distribution box 1 is installed in a vehicle C. Within the electrical distribution box 1, an electrical device 12 is housed in the aluminum enclosure 10. The electrical device 12 is connected to each of the multiple connectors 11, 11... and 11. A connector E2 is connected to each vehicle-specific device E1. The connectors E2 are attached to the connectors 11. If a connector E2 is attached to a connector 11, the electrical device 12 is connected to the corresponding vehicle-specific device E1.

[0024] If several connectors E2, E2... and E2 are attached to several connectors 11, 11... and 11 respectively, each of several vehicle-specific devices E1, E1... and E1 is connected via the electrical device 12 to at least one of the other vehicle-specific devices E1, E1... and E1.

[0025] As described above, the electrical distribution box 1 houses the electrical equipment 12 in the enclosure 10, and several vehicle-specific equipment E1, E1... and E1 are interconnected via the electrical equipment 12 housed in the enclosure 10. The vehicle-specific equipment E1 serves as external equipment.

[0026] The vehicle's own equipment E1 can be batteries, lights, motors, or the like. It is assumed here that one of the several vehicle's own equipment E1, E1... and E1 is a battery, and the remaining vehicle's own equipment E1, E1... and E1 are lights or motors. In a first example, the electrical equipment 12 has several fuses, and the battery is connected to the remaining vehicle's own equipment E1, E1... and E1 via these fuses. The electrical equipment 12 protects the remaining vehicle's own equipment E1, E1... and E1 from overcurrent.

[0027] In a second example, the electrical device 12 is a DC-DC converter that transforms a DC voltage. In this case, the electrical device 12 transforms the battery's output voltage and supplies the transformed voltage to the remaining vehicle equipment E1, E1... and E1. In a third example, the electrical device 12 has several switches, and the battery is connected to the remaining vehicle equipment E1, E1... and E1 via these switches. Switching the switches on and off changes which of the vehicle equipment E1 is supplied with power from the battery.

[0028] Fig. Figure 3 is a partial cross-sectional view of the electrical distribution box 1. Fig. Figure 4 is a front view of a connector 11. As in Fig. 3 and Fig. As shown in Figure 4, a connector 11 has a tubular section 20, which has a hollow cuboid shape with an open end face. The front end face of the tubular section 20 has a rectangular frame shape. The tubular section 20 has a rectangular opening 20a. A column-shaped projecting section 22 extends from a bottom wall 21 of the tubular section 20, or, in other words, to the left in the axial direction of the tubular section 20. In the connector 11, the tubular section 20 is located on the right side, and the projecting section 22 is located on the left side.

[0029] In the preceding section 22, a first columnar section 22a projects from the bottom wall 21 of the tubular section 20, or, in other words, in the axial direction of the tubular section 20 to the left. Furthermore, a second columnar section 22b projects from a section of the front end face of the first columnar section 22a in the axial direction of the tubular section 20 to the left. The second columnar section 22b projects in the same direction as the first columnar section 22a. A connecting wire 23 projects from the front end face of the second columnar section 22b.

[0030] A connector E2, connected to a vehicle-specific device E1, is inserted into the opening 20a of the connector 11. As a result, connector E2 is attached to the connector 11. With connector E2 attached to the connector 11, the connecting wire 23 is connected to the vehicle-specific device E1. The connecting wire 23 is connected to the electrical device 12. The electrical device 12 is connected to the vehicle-specific device E1 via the connecting wire 23, the connector 11, and connector E2.

[0031] In the electrical distribution box 1, a recessed section 22c, which forms a depression in the first columnar section 22a, is formed in the side surface of the first columnar section 22a of the projecting section 22. An adhesive element (sealing element) 3, which adheres to the housing 10 and the connector 11, is arranged in the recessed section 22c. The adhesive element 3 is a water-repellent elastic element made of rubber.

[0032] Fig. Figure 5 is a diagram illustrating the arrangement of the connector 11 and the adhesive element 3. Fig. Figure 5 shows an external view of the connector 11 in a state detached from the housing 10 and the adhesive element 3. As in Fig. As shown in Figure 5, the front end face of the first columnar section 22a has a rectangular shape, and the second columnar section 22b projects from the center of the front end face of the first columnar section 22a. The front end face of the second columnar section 22b also has a rectangular shape, and the connecting wire 23 projects from the center of the front end face of the second columnar section 22b.

[0033] In the first columnar section 22a of the preceding section 22, the recessed section 22c extends along the circumferential direction of the first columnar section 22a. The adhesive element 3 has a ring shape and surrounds the first columnar section 22a.

[0034] In the connector 11, a second projecting section 24 also extends from the side surface of the first columnar section 22a at a position closer to the tubular section 20 than to the recessed section 22c, or, in other words, to the right of the recessed section 22c. As in Fig. As shown in Figure 5, the second preceding section 24 runs along the circumferential direction of the first column-shaped section 22a.

[0035] Fig. Figure 6 is an exterior view showing a section of the housing 10. Fig. Figure 6 shows the external appearance of the housing 10 in a state detached from the connector 11 and the adhesive element 3. As in Fig. 3 and Fig. As shown in Figure 6, a rectangular insertion opening 41 is formed in a side wall 40 of the housing 10, into which the second column-shaped section 22b of the protruding section 22 of the connector 11 is inserted. The end face of the first column-shaped section 22a of the protruding section 22 is in contact with the circumferential edge section of the insertion opening 41 of the side wall 40.

[0036] A tubular first cover section 42 projects from the circumferential edge section of the insertion opening 41 of the side wall 40 away from the housing 10, or, in other words, to the right. As in Fig. As shown in Figure 6, the front end face of the first cover section 42 has a rectangular frame shape. The first cover section 42 has a rectangular opening 42a. As shown in Fig. As shown in Figure 3, the first columnar section 22a of the projecting section 22 of the connector 11 and the adhesive element 3 are provided on the inside of the first cover section 42, and the first cover section 42 covers the side surface of the first columnar section 22a and the adhesive element 3. The front end face of the first cover section 42 faces the side surface of the second projecting section 24.

[0037] The adhesive element 3 is positioned between the first columnar section 22a of the preceding section 22 and the first cover section 42, and adheres to both the first columnar section 22a and the first cover section 42. The adhesive element 3 comprises two annular adhesive sections 3a and 3a, which adhere to the first columnar section 22a and the first cover section 42, respectively, and are arranged side-by-side in the axial direction of the first columnar section 22a. The two adhesive sections 3a and 3a are connected by a non-adhesive section 3b, which is separated from both the first columnar section 22a and the first cover section 42.

[0038] The adhesive sections 3a are deformed by the pressure exerted by the first column-shaped section 22a and the first cover section 42. If the adhesive element 3 is positioned between the first column-shaped section 22a and the first cover section 42, the adhesive sections 3a are thinner than when the adhesive element 3 is detached. Because the adhesive element 3 adheres to the first column-shaped section 22a and the first cover section 42, the insertion opening 41 is hermetically sealed; this prevents water from entering the housing 10 through the insertion opening 41.

[0039] The adhesive element 3 adheres in several sections to the first cover section 42 of the housing 10 and to the first column-shaped section 22a of the connector 11. This reliably prevents water from entering the housing 10. If water does enter the housing 10 and comes into contact with the electrical device 12, the electrical device 12 may be damaged.

[0040] Since the recessed section 22c is provided, the probability is also low that the adhesive element 3 will move to an unintended position when the connector 11, in which the adhesive element 3 is provided on the first column-shaped section 22a of the preceding section 22, is attached to the housing 10.

[0041] A plate-like second cover section 43 projects from a portion of the front end face of the first cover section 42. The electrical distribution box 1 is installed such that the second cover section 43 is positioned at the top of the connector 11. The second cover section 43 extends along the top of the outer edge of the front end face of the first cover section 42, and the top surface of the first cover section 42 and the top surface of the second cover section 43 are continuous. The second cover section 43 covers the tubular section 20 and the first columnar section 22a of the projecting section 22, with a gap between them, and also covers the front end face of the second projecting section 24, with a gap between them. As in Fig. As shown in Figure 6, two side sections of the second cover section 43 run along the outer edge of the front end face of the first cover section 42; or, in other words, a front side section and a rear side section of the second cover section 43 are curved downwards. The two side sections of the second cover section 43 are opposite the connector 11.

[0042] As described above, the housing 10 is made of aluminum. The outer surface of the side wall 40, the outer surface of the first cover section 42, the upper surface of the second cover section 43, and the like of the housing 10 undergo a treatment called anodizing. Anodizing is a treatment to form an anodized layer on an aluminum surface. By forming a thick aluminum oxide layer on the surface, the corrosion resistance and abrasion resistance of the aluminum are improved.

[0043] In the electrical distribution box 1, the second cover section 43 covers the tubular section 20 of the connector 11 and the first columnar section 22a of the projecting section 22 of the connector 11, with a space between them. In this configuration, it is unlikely that water will penetrate from the upper surface of the second cover section 43 into the space between the first columnar section 22a and the first cover section 42; thus, it is unlikely that water will accumulate in the space between the first columnar section 22a and the first cover section 42. Therefore, the probability of saltwater accumulating in the space enclosed by the first columnar section 22a, the first cover section 42, and the adhesive element 3, and of the inner surface of the first cover section 42 corroding, is low.Since the probability of the inner surface of the first cover section 42 corroding is low, it is not necessary to anodize the inner surface of the first cover section 42.

[0044] The second cover section 43 further covers the front end face of the second projecting section 24 in such a way that a gap is arranged between them. Therefore, it is unlikely that water from the upper surface of the tubular section 20 and the second cover section 43 will penetrate into the space between the first columnar section 22a and the first cover section 42.

[0045] The upper surface of the tubular section 20 can be inclined downwards to the right. In this case, the probability that water that has flowed through the upper surface of the tubular section 20 and the second cover section 43 will penetrate into the space between the first columnar section 22a and the first cover section 42 is further reduced.

[0046] Furthermore, two side sections of the second cover section 43, which run along the outer edge of the front end face of the first cover section 42, are curved downwards to face the connector 11. Therefore, it is unlikely that water will penetrate from the two side sections of the second cover section 43 into the space between the first cover section 42 of the housing 10 and the first columnar section 22a of the projecting section 22 of the connector 11. Example 2

[0047] Fig. Figure 7 is a partial cross-sectional view of an electrical distribution box 1 according to embodiment 2.

[0048] The following section describes embodiment 2, focusing on its differences from embodiment 1. Components of embodiment 2 not described below are the same as those in embodiment 1. Accordingly, identical components to those in embodiment 1 bear the same reference numerals, and their further description is omitted.

[0049] Fig. 7 corresponds Fig. 3. In the electrical distribution box 1 according to embodiment 2, the second cover section 43 covers the upper surface of the first column-shaped section 22a of the projecting section 22 of the connector 11 and the second projecting section 24, with a gap between them, but without covering the tubular section 20 of the connector 11.

[0050] The electrical distribution box 1 set up as described above according to embodiment 2 provides the same effects as the electrical distribution box 1 according to embodiment 1. Example 3

[0051] Fig. Figure 8 is a partial cross-sectional view of an electrical distribution box 1 according to embodiment 3. Embodiment 3 is described below, focusing on its differences from embodiment 1. Components of embodiment 2 not described below are the same as those in embodiment 1. Accordingly, identical components as in embodiment 1 bear the same reference numerals, and their further description is omitted.

[0052] Fig. 8 corresponds Fig.3. In the electrical distribution box 1 according to embodiment 3, the second projecting section 24 extends from the outer side surface of the tubular section 20 of the connector 11. The second projecting section 24 runs along the circumferential direction of the tubular section 20. As in embodiment 1, the side surface of the second projecting section 24 faces the front end surface of the first cover section 42.

[0053] Furthermore, the second cover section 43 covers the tubular section 20 of the connector 11 and the upper surface of the second projecting section 24, with a space between them, but without covering the projecting section 22 of the connector 11.

[0054] The electrical distribution box 1 set up as described above according to embodiment 3 provides the same effects as the electrical distribution box 1 according to embodiment 1.

[0055] In embodiment 3, the second cover section 43 can be arranged as in embodiment 2, such that the second cover section 43 covers the upper surface of the second projecting section 24, but does not cover the tubular section 20, which is positioned to the right of the second projecting section 24.

[0056] In embodiments 1 to 3, the position of the second cover section 43 is not limited to the upper side section of the outer edge of the front end face of the first cover section 42. The second cover section 43 can, for example, extend along the entire outer edge of the front end face of the first cover section 42. Furthermore, the housing 10 is not necessarily made of aluminum, as long as it is made of a metal. In addition, the number of adhesive sections 3a in the adhesive element 3 is not limited to two, but can also be three or more. In this case, three or more adhesive sections 3a, 3a..., and 3a are arranged side by side in the axial direction of the first column-shaped section 22a, and two adjacent adhesive sections 3a and 3a are connected by a non-adhesive section 3b.The number of non-adhesive sections 3b is one less than the number of adhesive sections 3a.

[0057] In embodiments 1 to 3, the position of the connector 11 is not limited to the side wall 40, which is the right side wall of the housing 10, but can be located on any other section. Furthermore, not all of the multiple connectors of the electrical distribution box 1 need be configured in the same way as the connector 11. For example, if a connector is provided on the upper surface of the housing 10 of the electrical distribution box 1, this connector can have a configuration that differs from that of the connector 11. In this case, the section of the upper surface of the housing 10 to which the connector is attached is configured differently from the section of the housing 10 to which the connector 11 is attached.

[0058] The embodiments 1 to 3 disclosed herein are to be regarded in all aspects as illustrative and not as limiting. The scope of protection of the present invention is specified by the appended claims and not by the preceding description, and all modifications that are equivalent to the claims in meaning and scope are to be regarded as falling within the scope of protection of the present invention. REFERENCE MARK LIST 1 electrical distribution box 3 adhesive elements 3a Adhesive section 3b non-adhesive section 10 cases 11, E2 connector 12 electrical equipment 20 tubular section 20a, 42a Opening 21 Floor wall 22 preceding section 22a first columnar section 22b second columnar section 22c in-depth section 23 Connecting wire 24 second preceding section 40 side wall 41 Introductory section 42 first cover section 43 second cover section C vehicle E1 vehicle-specific equipment

Claims

Electrical distribution box (1) which is configured to accommodate an electrical device (12) and which is configured to connect several external devices (E1) to each other via the accommodated electrical device (12), wherein the electrical distribution box (1) comprises: a connector (11) which has a tubular section (20) with an open end face and a projecting section (22) which projects from a bottom wall (21) of the tubular section (20) away from the tubular section (20);a housing (10) for receiving the electrical device (12), wherein the housing (10) has an insertion opening (41) into which a section of the foreground section (22) is inserted, a tubular first cover section (42) projecting outwards from a circumferential edge section of the insertion opening (41) and covering the foreground section (22), and a second cover section (43) projecting from a section of a front end face of the first cover section (42) and covering the foreground section (22) or the tubular section (20), wherein a space is provided between the second cover section (43) and the foreground section (22) or the tubular section (20); and an adhesive element (3) which is provided between the forward section (22) of the connector (11) and the first cover section (42) of the housing (10) and adheres to the forward section (22) and the first cover section (42). Electrical distribution box (1) according to claim 1, wherein the connector (11) has a second projecting section (24) which projects from a side surface of the projecting section (22) or the tubular section (20), a side surface of the second projecting section (24) is opposite the front end face of the first cover section (42) of the housing (10), and the second cover section (43) covers a front end face of the second projecting section (24). Electrical distribution box (1) according to claim 1 or 2, wherein two side sections of the second cover section (43) are curved and opposite the connector (11). Electrical distribution box (1) according to one of claims 1 to 3, wherein the adhesive element (3) comprises: several adhesive sections (3a) that adhere to the protruding section (22) and the first cover section (42); and a non-adhesive section (3b) that is connected to two of the several adhesive sections (3a) and is separated from the protruding section (22) and the first cover section (42).

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