JP6149798B2 - Connection device - Google Patents

Description

  The technology disclosed in this specification relates to a connection device.

  Conventionally, in a connection device that connects between a terminal on an electric device side and an electric wire, in order to prevent an overcurrent from flowing on the electric wire side, a device in which a fuse is accommodated in an accommodating space provided inside is known. ing. As an example of such a connection device, for example, a connector described in Patent Document 1 is known.

JP 2011-222398 A

  By the way, in the connection device as described above, the fuse itself generates heat, and the member connected to the fuse may melt due to this heat. In particular, when the connection device is exposed to a vibration environment, if the heat from the fuse is transmitted to the member connected to the fuse, the member is easily melted. For this reason, in such a connection apparatus, it is requested | required that the heat dissipation of the member connected to the fuse should be improved.

  The technology disclosed in the present specification has been created in view of the above-described problems, and aims to suppress melting of a member connected to a fuse in a connection device in which the fuse is accommodated. .

  The technology disclosed in this specification includes a fuse extending in an axial shape, a pair of terminals attached to both ends of the fuse in the extending direction, one end connected to an electrical device, and the other end The first device side connection portion connected to the electric wire, one end portion is connected to the electric device, the other end portion is connected to one of the pair of terminals, and the cross-sectional area thereof is the first device side connection. And a second device-side connection portion that is larger than the cross-sectional area of any part of the portion.

  The heat dissipation of the member connected to the fuse is proportional to the cross-sectional area of the member. In the above connecting device, among the members connected to the electrical equipment, the cross-sectional area of the second equipment side connecting portion connected to the fuse via one terminal is not a member connected to the fuse, that is, the first It is larger than the cross-sectional area of the device side connection part. For this reason, compared with the 1st apparatus side connection part which is not connected with a fuse, the heat dissipation of the 2nd apparatus side connection part connected with the fuse via the terminal can be improved. As a result, the heat transmitted from the fuse is effectively dissipated from the second device-side connection portion, and the melting damage of the second device-side connection portion, which is a member connected to the fuse, can be suppressed.

  In the above connection device, one end portion is connected to the electric wire, and the other end portion is connected to the other of the pair of terminals. The second device side connection portion has a cross-sectional area that is It may be larger than the cross-sectional area of any part of the electric wire side connection part.

  Since the second device-side connection portion and the wire-side connection portion are connected to the fuse via each terminal, if the cross-sectional area of the second device-side connection portion is substantially equal to the cross-sectional area of the wire-side connection portion It is assumed that the heat from the fuse is distributed to both the second device side connection portion and the wire side connection portion. Therefore, when the cross-sectional area of the electric wire side connecting portion is increased, it is necessary to increase the cross sectional area of the electric wire connected to the electric wire side connecting portion. In this case, since a sufficient space is required in order to route the electric wire, there is a concern that the size of the connecting device increases as a whole.

  On the other hand, in the above configuration, since the cross-sectional area of the second device-side connecting portion is larger than the cross-sectional area of any part of the electric wire-side connecting portion, the heat from the fuse is connected to the second device-side connecting portion. Of the electric wire side connection portion, it is easy to be transmitted to a member having high heat dissipation, that is, the second device side connection portion, and is difficult to be transmitted to the electric wire side connection portion. For this reason, most of the heat from the fuse can be dissipated in the second device-side connection portion without increasing the cross-sectional area of the wire-side connection portion, and the connection device can be downsized.

  Said connection apparatus WHEREIN: The flat plate shape may be sufficient as the one end part of a said 1st apparatus side connection part, and a said 2nd apparatus side connection part, respectively.

  For the same cross-sectional area, the surface area is larger in the flat plate shape than in the cylindrical shape. Moreover, it is preferable that the one end part of the 1st apparatus side connection part connected with an electric device and the 2nd apparatus side connection part are the same shapes on the design of the terminal provided in the electric apparatus side. According to said structure, the heat dissipation from the 2nd apparatus side connection part of the heat | fever transmitted from a fuse can be improved compared with the case where a 2nd apparatus side connection part is cylindrical.

  According to the technology disclosed in this specification, in a connection device in which a fuse is accommodated, melting damage of a member connected to the fuse can be suppressed.

1 is a perspective view of a connection device according to Embodiment 1. FIG. The perspective view which shows the terminal of each member accommodated in the connection apparatus. Front view of connection device FIG. 4 is a cross-sectional configuration of the IV-IV cross section in FIG. FIG. 4 is a cross-sectional configuration of the VV cross section in FIG. 4, and is a cross sectional view of the hood portion of the connection device The perspective view of the connection apparatus which concerns on Embodiment 2. FIG. The perspective view which shows the terminal of each member accommodated in the connection apparatus. Front view of connection device FIG. 8 is a cross-sectional configuration of the IX-IX cross section in FIG. 9 is a cross-sectional configuration of the XX cross section in FIG. 9, and is a cross-sectional view of the hood portion of the connection device The perspective view of the connection apparatus which concerns on Embodiment 3. The perspective view which shows the plane cross section of the upper part of a connection apparatus Front view of connection device 14 is a cross-sectional configuration of the XIV-XIV cross section in FIG. 14 is a cross-sectional configuration of the XV-XV cross section in FIG.

<Embodiment 1>
The first embodiment will be described with reference to FIGS. 1 to 5. In this embodiment, the connection apparatus 1 which connects between the terminal provided in the electric equipment (not shown) side, such as an inverter, and an electric wire (not shown) is illustrated. The connecting device 1 contains a fuse 40 to be described later, and prevents an overcurrent from flowing from the electric device side to the electric wire side. In the following, the connection side with the terminal on the electric equipment side, that is, the lower left side of the drawing in FIGS. 1 and 2, and the left side of the drawing in FIG. The right side of the drawing in FIG. 4 and the right side of the drawing in FIG. Further, the lower right side of the drawing in FIGS. 1 and 2 and the lower side in FIG. 4 are the right side of the connection device 1, and the upper left side of the drawing in FIGS. 1 and 2 and the upper side in FIG. And

  As shown in FIGS. 1 and 2, the connection device 1 is arranged in a form extending in the front-rear direction with the housing 10, and a pair of metal-side device-side connection portions whose front end portions are connected to terminals on the electric device side. 20, 21 and a pair of cylindrical metal (pin-shaped) wire-side connection portions 30, 31 that are arranged in a shape extending in the front-rear direction and whose rear end portion is connected to the electric wire, and an axis along the front-rear direction And a pair of metallic terminals 50 attached to both ends of the fuse 40 in the front-rear direction.

  Below, among the pair of device side connection portions 20 and 21, the device side connection portion disposed relatively on the right side is referred to as one device side connection portion (an example of a second device side connection portion) 20, and the relative In particular, the device-side connection portion disposed on the left side is referred to as the other device-side connection portion (an example of the first device-side connection portion) 21. Moreover, the electric wire side connection part distribute | arranged to the right side among a pair of electric wire side connection parts 30 and 31 is called one electric wire side connection part (an example of an electric wire side connection part) 30, and it is relatively left. The arranged electric wire side connecting portion is referred to as the other electric wire side connecting portion 31. In connection device 1, as shown in Drawing 2 and Drawing 3, one apparatus side connection part 20 is made into a columnar shape (pin shape) among a pair of apparatus side connection parts 20 and 21, and the other apparatus side connection part. 21 is a flat plate shape (tab shape) with its plate surface facing in the left-right direction. Of the pair of electric wire side connecting portions, the front end portion of the other electric wire side connecting portion 31 is processed into a flat plate shape to be a plate-like portion 31A.

  As shown in FIGS. 1 and 2, the housing 10 is provided on the left side of the substantially cylindrical first housing part 12 and the first housing part 12. It consists of a substantially cylindrical second housing part 14 smaller than the housing part 12 and a hood part 16 extending from the first housing part 12 and the second housing part 14 into a horizontally long cylindrical shape toward the front.

  As shown in FIGS. 2 and 4, a substantially cylindrical first accommodating space 12 </ b> A is provided inside the first housing portion 12. The fuse 40 and the pair of terminals 50 are housed in the first housing space 12A. Inside the second housing part 14, a substantially cylindrical second accommodation space 14 </ b> A is provided. The hood portion 16 is provided so as to surround the front side portions of the pair of device side connection portions 20 and 21 with a predetermined interval therebetween. As shown in FIG. 3, the pair of device-side connection portions 20 and 21 are substantially equal in the vertical direction within a space formed inside the hood portion 16.

  As shown in FIGS. 2 and 4, a rectangular first communication hole that communicates both spaces between the first housing space 12 </ b> A of the first housing portion 12 and the space formed inside the hood portion 16. 12B is provided. In addition, a rectangular second communication hole 14 </ b> B is provided between the second housing space 14 </ b> A of the second housing portion 14 and the space formed inside the hood portion 16 so as to communicate both spaces. The shape and size of the opening of the first communication hole 12B are substantially equal to the shape and size of the cross section of one device-side connecting portion 20, and the shape and size of the opening of the second communication hole 14B are the other. The shape and size of the cross section of the device side connection portion 21 are substantially equal.

  The fuse 40 is a well-known one (for example, a current-limiting fuse) filled with arc-extinguishing sand inside, and is extended in an axial shape along the front-rear direction, and has a substantially cylindrical shape as a whole. Both ends of the fuse 40 in the front-rear direction are contact portions with the terminals 50. The fuse 40 is electrically connected between the pair of terminals 50 by attaching the pair of terminals 50 to both ends thereof. The fuse 40 is a so-called high voltage fuse, and generates heat when energized between a pair of terminals 50 attached to both ends.

  As shown in FIG. 2 and FIG. 4, of the pair of terminals 50, the terminal 50 attached to the front end portion of the fuse 40 is a circle disposed opposite to the cylindrical portion 52 and the end surface of the fuse 40. And a plate-like facing portion 54. The cylindrical portion 52 constituting the terminal 50 extends rearward from the outer peripheral edge of the facing portion 54 and is provided so as to surround the peripheral wall of the front end portion of the fuse 40. The cylindrical portion 52 is slightly reduced in diameter from the facing portion 54 toward the rear thereof, and is in contact with the peripheral wall of the front end portion of the fuse 40 over substantially the entire circumference thereof.

  As shown in FIGS. 2 and 4, of the pair of terminals 50, the terminal 50 attached to the rear end portion of the fuse 40 is arranged to face the cylindrical portion 52 and the end surface of the fuse 40. It has a disk-shaped facing part 54 and a fitting part 156 extending from the facing part 154. Among these, the cylindrical portion 52 and the facing portion 54 have the same configuration as the terminal 50 attached to the front end portion of the fuse 40. Accordingly, the cylindrical portion 52 constituting the terminal 50 is in contact with the peripheral wall of the rear end portion of the fuse 40 over substantially the entire circumference thereof. The fitting portion 56 constituting the terminal 50 extends in a columnar shape from a substantially central position of the facing portion 54 toward the side opposite to the side where the cylindrical portion 52 is provided, and has a concave recess 56A (FIG. 4). See).

  In the connection device 1, as shown in FIGS. 2 and 4, one device-side connection portion 20 and one electric wire-side connection portion 30 are connected to each other via a fuse 40 and a pair of terminals 50. Specifically, one device-side connection portion 20 extends forward from a substantially central position of the facing portion 54 of the terminal 50 attached to the front end portion of the fuse 40 and penetrates through the first communication hole 12B. The front side portion is located in a space formed inside the hood portion 16. That is, one device-side connection portion 20 is formed integrally with the terminal 50 attached to the front end portion of the fuse 40. One electric wire side connection portion 30 is electrically connected to the terminal 50 by inserting the front end portion thereof into the recess 56A of the fitting portion 56 of the terminal 50 attached to the rear end portion of the fuse 40. Yes.

  As shown in FIGS. 2 and 4, a first seal member 60 and a first lid body 62 each having a through hole are fitted into the rear side of the first accommodating space 12 </ b> A in order, thereby The rear side of the one accommodating space 12A is sealed. One of the electric wire side connection portions 30 is inserted through the through holes of the first seal member 60 and the first lid body 62 so that the rear side portion is exposed to the outside of the housing 10. In addition, the surface of one of the electric wire side connecting portions 30 excluding the portion electrically connected to the terminal 50 is covered with an insulating coating 30A (see FIG. 4).

  Moreover, in the connection apparatus 1, as shown in FIG.2 and FIG.4, the rear-end part of the other apparatus side connection part 21 and the front-end part of the other electric wire side connection part 31 are directly connected. Specifically, the other device side connection portion 21 is electrically connected to the plate-like portion 31A provided at the front end portion of the other wire side connection portion 31 by resistance welding in the second housing space 14A. It is connected to the. The other device-side connection portion 21 extends forward from the second accommodation space 14 </ b> A and penetrates the second communication hole 14 </ b> B and is positioned in a space formed at the front side thereof inside the hood portion 16. .

  As shown in FIGS. 2 and 4, on the rear side of the second accommodation space 14 </ b> A, similarly to the first accommodation space 12 </ b> A, a second seal member 64 and a second lid 66 each having a through hole are sequentially provided. The rear side of 14 A of 2nd accommodation space is sealed by this. The other electric wire side connecting portion 31 is inserted through the through hole of the second seal member 64 and the second lid body 66, so that the rear side portion is exposed to the outside of the housing 10. Further, the surface of the other electric wire side connecting portion 31 excluding the plate-like portion 31A connected to the other device side connecting portion 21 is covered with an insulating coating 31A (see FIG. 4).

  Now, in the connection device 1 of the present embodiment, as described above, the shapes of the pair of device side connection portions 20 and 21 are different from each other. As shown in FIGS. The size of the cross-sectional area is different from the size of the cross-sectional area of the other device-side connecting portion 21. That is, the cross-sectional area of one device-side connection portion 20 is larger than the cross-sectional area of any part of the other device-side connection portion 21 (see FIG. 4). Moreover, in the connection apparatus 1, as shown in FIG. 4, the cross-sectional area of one apparatus side connection part 20 is larger than the cross-sectional area of any site | part of the one electric wire side connection part 30. As shown in FIG.

  As described above, in the connection device 1 according to the present embodiment, one of the pair of device side connection portions 20 and 21 connected to the terminal on the electric device side is connected to the fuse 40 via the one terminal 50. The cross-sectional area of the device-side connecting portion 20 is larger than the cross-sectional area of the member not connected to the fuse 40, that is, the other device-side connecting portion 21. Here, the heat dissipation of the member connected to the fuse 40 is proportional to the cross-sectional area of the member. For this reason, compared with the other apparatus side connection part 21 which is not connected with the fuse 40, the heat dissipation of the one apparatus side connection part 20 connected with the fuse 40 via the terminal 50 can be improved. As a result, when the fuse 40 generates heat due to energization, the heat transmitted from the fuse 40 is effectively dissipated from the one device-side connecting portion 20, and the melting of the one device-side connecting portion 20 that is a member connected to the fuse 40 is performed. Loss can be suppressed.

  In addition, in this embodiment, it is preferable to enlarge the cross-sectional area also about the terminal by the side of the electric equipment connected with the one apparatus side connection part 20. FIG. That is, it is preferable to make the cross-sectional area of the terminal on the electric device side equal to the cross-sectional area of one device-side connecting portion 20. By doing in this way, since the heat from the fuse 40 is also effectively dissipated in the terminal on the electric device side connected to the one device side connection portion 20, not only the one device side connection portion 20, It is also possible to suppress melting of the terminals on the electric equipment side.

  Here, since one apparatus side connection part 20 and one electric wire side connection part 30 are connected with the fuse 40 via each terminal 50, the cross-sectional area of one apparatus side connection part 20 and one electric wire are assumed. If the cross-sectional areas of the side connection portions 30 are substantially equal, it is assumed that heat from the fuse 40 is distributed to both the one device side connection portion 20 and the one electric wire side connection portion 30. Therefore, when the cross-sectional area of one electric wire side connection portion 30 is increased, it is necessary to increase the cross-sectional area of the electric wire connected to one electric wire side connection portion 30. In this case, since a sufficient space is required in order to route the electric wire, there is a concern that the size of the connection device 1 is increased as a whole.

  On the other hand, in this embodiment, since the cross-sectional area of one apparatus side connection part 20 is larger than the cross-sectional area of any site | part of the one electric wire side connection part 30, the heat | fever from the fuse 40 is the one apparatus side. Of the connecting portion 20 and the one electric wire side connecting portion 30, it is easy to be transmitted to a member having high heat dissipation, that is, one device side connecting portion 20, and difficult to be transferred to one electric wire side connecting portion 30. For this reason, when the fuse 40 generates heat by energization without enlarging the cross-sectional area of one electric wire side connection part 30, most of the heat from the fuse 40 can be radiated in the one apparatus side connection part 20. The connection device 1 can be downsized.

<Embodiment 2>
Next, Embodiment 2 will be described with reference to FIGS. The present embodiment is different from that of the first embodiment in that it further includes a shape and configuration of the housing 110, a disk-shaped connection portion 123, a columnar connection portion 124, and two cylindrical members 170 and 171. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted. 6 to 10, the parts obtained by adding the numeral 100 to the reference numerals in FIGS. 1 to 5 are the same as the parts described in the first embodiment.

  In the present embodiment, as shown in FIGS. 7 and 9, two cavities 116 </ b> A having a substantially cylindrical space are provided side by side in the left-right direction inside the hood portion 116 in the housing 110 of the connection device 101. . The two cavities 116 </ b> A are provided so as to surround the front side portions of the device side connection portions 120 and 121 with a predetermined gap therebetween. Further, the dimension in the front-rear direction of the second housing 114 in the housing 110 is equivalent to the dimension in the front-rear direction of the first housing part 112, and the dimension in the front-rear direction of the second housing space 114A is also the same as that of the first housing space 112A. It is equivalent to the dimension in the front-rear direction.

  Moreover, in this embodiment, as shown in FIGS. 7-9, the other apparatus side connection part 121 is made into the column shape (pin shape). Further, in the second storage space 114A, a disk-shaped disk-shaped connection part 123 and a columnar connection part 124 extending in a columnar shape from the substantially central position of the disk-shaped connection part 123 to the rear are accommodated. Has been. The other device side connection part 121 extends forward from a substantially central position of the disk-like connection part 123 and is formed integrally with the disk-like connection part 123 and the columnar connection part 124. Further, the columnar connecting portion 124 has a concave second concave portion 124A therein. In the present embodiment, in the second accommodation space 114A, the front end portion of the other electric wire side connection portion 131 is inserted into the second concave portion 124A, whereby the other device side connection portion 121 and the other electric wire side connection side are inserted. The connection part 131 is electrically connected via the disk-like connection part 123 and the columnar connection part 124.

  Further, in the present embodiment, as shown in FIGS. 7 and 9, in the first housing space 112 </ b> A of the first housing portion 112, in addition to the fuse 140 and the pair of terminals 150, a cylindrical first opening that opens in the front-rear direction. The cylindrical member 170 is accommodated. A cylindrical second cylindrical member 171 that opens back and forth is accommodated in the second accommodation space 114 </ b> A of the second housing 114. The first cylindrical member 170 and the second cylindrical member 171 have the same size in the front-rear direction and are larger than the size in the front-rear direction of the fuse 140, and the first housing space 112A and the second housing It is smaller than the dimension of the space 114A in the front-rear direction.

  The rear portion of the first tubular member 170 is thick, and the inner diameter thereof is substantially equal to the outer diameter of the fitting portion 156 of the other terminal 150. On the other hand, the portion of the first tubular member 170 excluding the thickened portion is relatively thin compared to the thickened portion of the inner wall, and the inner diameter of each terminal 150 is It is substantially equal to the outer diameter of the cylindrical portion 152. The front end of the first tubular member 170 is in contact with the rear surface of the cylindrical portion 152 of the terminal 150 attached to the front end of the fuse 140, and the front surface of the thickened portion is the rear of the fuse 140. It is in contact with the rear surface of the cylindrical portion 152 of the terminal 150 attached to the end portion. Further, the rear end portion of the first tubular member 170 is prevented from coming out backward by contacting the first seal member 60. Thus, the fuse 140 and each terminal 150 attached to the fuse 140 are held by the first cylindrical member 170 in the first accommodation space 112A.

  The entire second cylindrical member 171 is thin. The front end of the second cylindrical member 171 is in contact with the rear surface of the disk-shaped connecting portion 123, and the rear end thereof is in contact with the second seal member 164 so as to be prevented from coming out rearward. . Thereby, the disk-shaped connection part 123 and the columnar connection part 124 are held by the second cylindrical member 171 in the second accommodation space 112A.

  Now, in the connection apparatus 101 of this embodiment, as shown in FIG. 10, the magnitude | size of the cross-sectional area of a pair of apparatus side connection parts 120 and 121 made into the same shape mutually differs. In other words, the cross-sectional area of one device-side connecting portion 120 is larger than the cross-sectional area of any part of the other device-side connecting portion 121 (see FIG. 9). For this reason, when the fuse 140 generates heat due to energization, the heat transmitted from the fuse 140 is effectively dissipated from the one device-side connecting portion 120, and the melting of the one device-side connecting portion 120 that is a member connected to the fuse 140 is performed. Loss can be suppressed.

  Moreover, in the connection apparatus 101 of this embodiment, as shown in FIG. 9, the cross-sectional area of one apparatus side connection part 120 is larger than the cross-sectional area of any site | part of the one electric wire side connection part 130. As shown in FIG. For this reason, the heat from the fuse 140 is easily transferred to one of the device side connection portion 120 and the one electric wire side connection portion 130 to the member having higher heat dissipation, that is, the one device side connection portion 120. . As a result, when the fuse 140 generates heat by energization without enlarging the cross-sectional area of one of the electric wire side connection portions 130, most of the heat from the fuse 140 can be dissipated in the one device side connection portion 120. The connection device 101 can be downsized.

  In the connection device 101 according to the present embodiment, the pair of device side connection portions 120 and 121 are both cylindrical (pin shape). For this reason, compared with the case where either of a pair of apparatus side connection parts 120 and 121 is made into the plate shape which turned the plate | board surface to the left-right direction, the dimension of the up-down direction of the said connection part can be suppressed, Space-saving can be achieved about the space where a connection part is arranged. Moreover, it can be easy to connect with an electric wire compared with the case where either of a pair of apparatus side connection parts 120 and 121 is made into flat form.

  In the connection device 101 of the present embodiment, each terminal 150 attached to the fuse 140 is held by the first tubular member 170 in the first accommodation space 112A. For this reason, even when the connection device 101 is exposed to a vibration environment, it is difficult for one device-side connection portion 120 connected to one terminal 150 to slide. For this reason, the melting damage of the one apparatus side connection part 120 in a vibration environment can be suppressed further.

<Embodiment 3>
Next, Embodiment 3 will be described with reference to FIGS. In this embodiment, a fuse 240 described later is accommodated therein, and a connection device 201 that connects between a terminal provided on an electric device (not shown) such as an inverter and an electric wire (not shown) is illustrated. In the present embodiment, the connection side with the terminal on the electric equipment side, that is, the lower left side in FIG. 12 and the lower side in FIG. 14 are the front side of the connection device 201, and the connection side with the electric wires, ie, the lower side in FIGS. It demonstrates below the apparatus 1. FIG. In addition, a direction orthogonal to both the front-rear direction and the up-down direction of the connection device 201 (the left-right direction in FIGS.

  As shown in FIGS. 11 to 13, the connecting device 201 has a housing 210, a pair of flat plate (tab-shaped) device-side connection portions 220 and 221 connected to terminals on the electric device side, and a shape extending vertically. A pair of columnar (pin-shaped) wire-side connection portions 230 and 231 whose lower end portions are connected to the electric wire, and a fuse 240 (see FIG. 14) extending in the axial direction along the vertical direction, A pair of terminals 250 provided at both ends in the extending direction of the fuse 240 are provided. In the following description, the one end side of the pair of device side connection portions 220 and 221 will be described as the side connected to the terminal on the electric device side, and the lower end side of the pair of wire side connection portions 230 and 231 will be described. Is described as the side connected to the electric wire.

  As shown in FIG. 13, the housing 210 includes a main body portion 212 that is a box shape having a rectangular shape in front view, a device-side hood portion 214 that extends in a horizontally long cylindrical shape from the upper front surface of the main body portion 212 toward the front, And an electric wire side hood portion 216 extending in a horizontally long cylindrical shape downward from the bottom surface of the portion 212. Among these, the apparatus side hood part 214 is provided in the form which surrounds the one end part side of a pair of apparatus side connection parts 220 and 221 at predetermined intervals (refer FIG. 2). The electric wire side hood part 216 is provided so as to surround a part of the pair of electric wire side connection parts 230 and 231 extending downward from the main body part 212 with a predetermined interval. The lower side of the electric wire side hood portion 216 is sealed by a seal member (not shown) disposed inside the electric wire side hood portion 216.

  As shown in FIGS. 12 and 14, a housing space 212 </ b> A is provided inside the main body 212. Further, a rear cover 218 is attached to the rear side of the main body 212 of the housing 210 as shown in FIGS. The rear cover 218 is for facilitating the assembling work of the connecting device 201, and is provided with a rubber ring 219 for sealing the inside of the main body 212 on the outer peripheral surface thereof.

  As shown in FIGS. 12 and 14, the fuse 240 is accommodated in the accommodating space 212 </ b> A of the main body 212. The shape and configuration of the fuse 240 are the same as those of the first and second embodiments. Each terminal 250 attached to both ends of the fuse 240 has a cylindrical shape and is in contact with the peripheral walls of both ends of the fuse 240. Each terminal 250 has a plate-like terminal connection portion 250 </ b> A extending in the left-right direction from a cylindrical portion attached to the end of the fuse 240. Of the terminals 250 attached to both ends of the fuse 240, the terminal attached to the lower end of the fuse 240 (the other terminal) is not shown.

  In the housing 210, as shown in FIGS. 12 and 14, between the accommodation space 212A of the main body portion 212 and the space formed inside the device-side hood portion 214, both spaces are communicated and the opening is rectangular. Two communication holes 270 and 271 are provided. In the connection device 201, one device-side connection portion 220 and one electric wire-side connection portion 230 are connected to each other via a fuse 240 and a pair of terminals 250.

  That is, one device-side connection portion 220 has the other end portion extending through one communication hole 270 and into the accommodation space 212A, and resistance welding with the terminal connection portion 250A of one terminal 250 in the accommodation space 212A. Are electrically connected (see FIG. 14). And one electric wire side connection part 230 is connected with the terminal connection part of the other terminal in the accommodation space 212A while the upper part extends into the accommodation space 212A, and its lower part is the electric wire side hood part. The lower end of 216 is exposed to the outside of the housing 210 and extends downward.

  On the other hand, in the connection device 201, the other apparatus side connection part 221 and the other electric wire side connection part 231 are directly connected in the accommodation space 212A. That is, the other device side connection portion 221 has the other end portion extending through the other communication hole 271 and into the accommodation space 212A, and the upper end portion of the other wire side connection portion 231 and the resistance in the accommodation space 212A. They are electrically connected by welding (see FIG. 14). The lower portion of the other wire side connection portion 231 is exposed to the outside of the housing 210 from the lower end of the wire side hood portion 216 and extends downward.

  Now, in the connection apparatus 201 of this embodiment, as shown in FIG. 15, the magnitude | size of the cross-sectional area of a pair of apparatus side connection parts 220 and 221 made into the same shape mutually differs. That is, the cross-sectional area of one device-side connecting portion 220 is larger than the cross-sectional area of any part of the other device-side connecting portion 221 (see FIG. 14). For this reason, when the fuse 240 generates heat due to energization, the heat transmitted from the fuse 140 is effectively dissipated from the one device side connection portion 220, and the melting of the one device side connection portion 220 that is a member connected to the fuse 240 is performed. Loss can be suppressed.

  Here, in the case of the same cross-sectional area, the surface area of the flat plate shape is larger than that of the cylindrical shape. Moreover, it is preferable that one end part of a pair of apparatus side connection part connected with an electric equipment is the same shape from the design of the terminal provided in the electric equipment side. On the other hand, in this embodiment, as above-mentioned, both of a pair of apparatus side connection parts 220 and 221 are made into flat form (tab shape). For this reason, compared with the case where one apparatus side connection part 220,221 is cylindrical, the heat dissipation from the one apparatus side connection part 220 of the heat | fever transmitted from the fuse 240 can be improved.

Other modifications of the above embodiment are listed below.
(1) In each of the above embodiments, the connection device for connecting between the terminal on the electric device side and the electric wire is illustrated as an example of the connection device, but the present invention is not limited to this. The connection device disclosed in this specification can be applied as various connection devices.

(2) In each of the above-described embodiments, one device-side connection portion has a columnar shape, the other device-side connection portion has a flat plate shape, and a pair of device-side connection portions have both columnar shapes. The configuration and the configuration in which the pair of device side connection portions are both flat are illustrated, but one device side connection portion is a flat plate shape, and the other device side connection portion is a column shape. Also good.

(3) In each of the above-described embodiments, the configuration in which the pair of device-side connection portions is a flat plate shape or a columnar shape is illustrated, but the shape of the device-side connection portion is not limited.

(4) In each of the above embodiments, the configuration in which each terminal attached to both ends of the fuse has a cylindrical portion is exemplified, but the shape and configuration of each terminal attached to both ends of the fuse are limited. Not. Further, the connection mode between the terminal attached to one end portion of the fuse and one of the device side connection portions is not limited.

(5) In each of the above embodiments, one terminal and one device-side connecting portion are connected, and the other terminal and one electric wire-side connecting portion are connected. The structure by which the apparatus side connection part was connected may be sufficient. In this case, by making the cross-sectional area of the device-side connection portion connected to the other terminal larger than the cross-sectional area of the device-side connection portion not connected to the fuse, the device-side connection portion connected to the other terminal can also be removed from the fuse. Can effectively dissipate heat.

(6) In addition to the above embodiments, the shape of the housing, the connection mode between the device-side connecting portion and the wire-side connecting portion, the shape of the fuse, and the like can be changed as appropriate.

  Each embodiment has been described in detail above, but these are merely examples, and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

DESCRIPTION OF SYMBOLS 1,101,201 ... Connection apparatus 10,110,210 ... Housing 12,112 ... 1st housing 12A, 112A ... 1st accommodation space 14,114 ... 2nd housing 14A, 114A ... 2nd accommodation space 16,116 ... hood Unit 20, 120, 220 ... (one) device side connection unit 21, 121, 221 ... (the other) device side connection unit 30, 130, 230 ... (one) wire side connection unit 31, 131, 231 ... (one) Electric wire side connection part 40,140,240 ... fuse 50,150,250 ... terminal 52,152 ... cylindrical part 54,154 ... opposing part 116A ... cavity 156 ... fitting part 170 ... first cylindrical member 171 ... 2nd cylindrical member 214 ... Equipment side hood part 216 ... Electric wire side hood part 250A ... Terminal connection part

Claims (3)

A fuse extending axially;
A pair of terminals attached to both ends of the fuse in the extending direction;
A first device-side connecting portion in which one end is connected to an electric device and the other end is connected to an electric wire;
The second end is connected to an electric device, the other end is connected to one of the pair of terminals, and the cross-sectional area is larger than the cross-sectional area of any part of the first device-side connecting portion. Device side connection,
A connection device comprising: One end is connected to the electric wire, and the other end is provided with an electric wire side connecting portion connected to the other of the pair of terminals,
The connection device according to claim 1, wherein the second device-side connection portion has a cross-sectional area larger than a cross-sectional area of any portion of the electric wire-side connection portion.   The connection device according to claim 1 or 2, wherein one end of the first device-side connection portion and the second device-side connection portion each have a flat plate shape.

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