JP6498533B2 - Fuse unit - Google Patents

Description

  The present invention relates to a fuse unit.

  Conventionally, for example, a fuse unit that supplies electric power of a battery mounted on a vehicle to a circuit in the vehicle via a fusible body is known (for example, see Patent Document 1). In such a fuse unit, a fusible body is accommodated in the housing so that fusing when a current exceeding a threshold value flows can be visually recognized. FIG. 5 is a schematic diagram showing an example of a peripheral structure of a fusible body in a conventional fuse unit.

  In the fuse unit 5 shown in FIG. 5, three fusible bodies 51 are accommodated in a housing 52 in parallel. The housing 52 is provided with three cylindrical storage chambers 521 arranged in parallel to store the fusible bodies 51 one by one. The openings 521a of these three storage chambers 521 are closed with a band plate-like cover 53 in order to prevent metal scattering when the fusible member 51 is melted. The cover 53 is formed of a resin having transparency, and the fusing of the fusible body 51 inside each storage chamber 51 is visually recognized through the cover 53.

  A pair of locking claws 531 for fixing the cover 53 to the housing 52 are provided at both ends of the cover 53. In the housing 52, a locking hole 521c for locking the locking claw 531 of the cover 53 is provided in each of the pair of walls 521b positioned at both ends in the left-right direction in the drawing among the walls that define the storage chamber 521. ing. FIG. 6 shows how the cover shown in FIG. 5 is attached to the housing.

  As shown in FIG. 6, when the cover 53 is pushed into the mounting direction D51 with respect to the housing 52, the pair of locking claws 531 have their tips on the pair of walls 521b provided with the locking holes 521c. By abutting, it enters the housing 52 while opening in the opening direction D52 due to the flexibility of the resin. Eventually, when the leading end reaches the locking hole 521c, the pair of locking claws 531 closes by the leading end fitting into the locking hole 521c and locking. The cover 53 is attached to the housing 52 in this way.

  Here, an entry space 52b is provided between the pair of walls 521b provided with the locking holes 521c and the outer wall 52a of the housing 52 so that the pair of locking claws 531 can enter while opening as described above. It has been. With such an entry space 52 b, the pair of locking claws 531 can enter the housing 52 without interfering with the housing 52.

JP 2014-96217 A

  Here, since the fuse unit 5 shown in FIGS. 5 and 6 requires the entry space 52b as described above in order to attach the cover 53 to the housing 52, the outer dimensions thereof tend to be large. It is. On the other hand, in recent years, space saving of a vehicle has progressed, and a space margin for installing the fuse unit as described above is decreasing, and it is desirable that the fuse unit be as small as possible.

  Accordingly, the present invention focuses on the above-described problems, and an object of the present invention is to provide a fuse unit that is miniaturized while providing a cover for preventing metal scattering in a fusible body.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a fusible body, a housing in which a housing chamber in which the fusible body is housed is provided penetrating in one direction, and the housing chamber. Two plate-like members that block the openings at both ends, at least one of which has transparency, and each of the two covers is a flat cover body, and The first main body extending along the in-plane direction of the cover body and the second main body projecting along the out-of-plane direction of the cover body so as to face the other cover facing the cover body. A pivot piece coupled to the cover body, the pivot piece being disposed in the first position when the cover is attached to the housing, and pivoting to the second position after the cover is attached. The two covers that are Turning piece which is rotated to the second position from Les is a fuse unit, characterized in that it is configured to be coupled to each other.

  According to a second aspect of the present invention, in the fuse unit according to the first aspect, each of the two covers covers the housing in a position where the opening is closed in the insertion direction intersecting the penetration direction of the storage chamber. Two insertion paths having an insertion port opened are provided on the outer surface of the housing to be inserted.

  According to a third aspect of the present invention, in the fuse unit according to the second aspect, the rotating piece is rotated to the second posture after the insertion, and is forward of the insertion direction inside the housing. The rotating pieces rotated from the two covers to the second posture are coupled to each other while contacting the inner wall surface. It is characterized by that.

  According to a fourth aspect of the present invention, in the fuse unit according to the second or third aspect, the outer edge is formed on at least a part of the inner wall surface of the housing where the outer edge of the cover main body of each of the two covers contacts. An insertion groove to be fitted is provided.

  The invention according to claim 5 is the fuse unit according to any one of claims 2 to 4, wherein a plurality of the storage chambers are arranged along the insertion direction and provided in the housing. The insertion path includes a slit provided in a partition wall that partitions the storage chamber and through which the cover body passes.

  According to a sixth aspect of the invention, in the fuse unit according to any one of the first to fifth aspects, the rotating pieces of the two covers are rotated to the second posture. A pair is sometimes provided so as to face each other.

  According to a seventh aspect of the present invention, in the fuse unit according to any one of the first to sixth aspects, the rotating piece is formed in a strip shape, and one end thereof is rotatably connected to the cover body. And the other end has a shape bent in a bowl shape, and the rotating pieces rotated from the two covers to the second posture are connected to each other. Features.

  According to an eighth aspect of the present invention, in the fuse unit according to the seventh aspect, there is provided a hole into which the other end bent in a hook shape in the rotating piece of one of the two covers is fitted when coupled. The second cover is provided on the rotating piece.

  According to the first aspect of the present invention, the two covers that play the role of preventing the metal from scattering in the fusible body by closing the opening of the storage chamber, and after the opening is closed, the rotating piece is the second piece. It is held by being rotated into a posture and coupled to each other. At this time, the rotating piece is rotated to the second posture protruding along the out-of-plane direction of the cover main body so as to face the facing cover. The cover is not deformed to increase the size. As described above, the cover is not deformed so that the outer dimension in plan view is enlarged from the attachment of the cover to the holding of the rotating piece by the rotation and coupling to the housing. Therefore, there is no need for a space margin in anticipation of an increase in the outer dimensions when the cover is attached to the housing, such as the entry space 52b described with reference to FIG. 6, and the housing is downsized accordingly. Can do. Therefore, according to the first aspect of the present invention, it is possible to reduce the size of the fuse unit while providing a cover for preventing the metal from scattering in the fusible body.

  According to the second aspect of the present invention, the two covers are simply inserted into the insertion path until reaching the position for closing the opening. For this reason, even during this insertion, for example, the deformation described with reference to FIG. Thus, according to the second aspect of the present invention, the outer dimension of the cover is enlarged in the plan view from the insertion of the cover to the holding of the rotating piece by the rotation and coupling to the housing. No significant deformation occurs. Therefore, according to the second aspect of the present invention, the fuse unit can be further reduced in size.

  According to a third aspect of the invention, the rotating piece is rotated to the second posture and is coupled to each other while being in contact with the inner wall surface, so that the cover is prevented from coming off inside the housing. Can be held in.

  According to the fourth aspect of the present invention, since the insertion groove into which the outer edge is fitted is provided on at least a part of the inner wall surface with which the outer edge of the cover main body abuts, the posture of the cover inside the housing is stabilized. Can be achieved.

  According to the fifth aspect of the present invention, the insertion path of the cover in the housing is configured to include a slit that is provided on a partition wall that partitions the plurality of storage chambers and through which the cover main body passes. Thereby, the attitude | position of the cover in an insertion path can be stabilized.

  According to the sixth aspect of the present invention, a pair of rotating pieces for each of the two covers is provided, and the two covers are coupled by a rotating piece provided for each cover in pairs. It is possible to increase the holding strength of the two covers.

  According to the seventh aspect of the present invention, the rotating pieces rotated from the two covers to the second posture are coupled to each other by bending the other ends bent in a bowl shape. Can be increased.

  According to the eighth aspect of the present invention, the hole in which the other end of the rotating piece of one cover is fitted when the cover is coupled is provided in the rotating piece of the other cover. By fitting the protrusion into the hole, the coupling strength of the rotating piece can be further increased.

It is a perspective view which shows the fuse unit of one Embodiment of this invention. It is a top view which shows the planar view shape of the fuse unit shown by FIG. It is a figure which shows a mode that the rotation piece provided in the cover of 2 sheets shown by FIG. 1 mutually couple | bonds with the AA cross section in FIG.1 and FIG.2. It is an enlarged view of the connection part in a rotation piece. It is a schematic diagram which shows an example of the periphery structure of the soluble body in the conventional fuse unit. It is a figure which shows a mode that the cover shown by FIG. 5 is attached to a housing.

  A fuse unit according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a fuse unit according to an embodiment of the present invention, and FIG. 2 is a plan view showing a plan view shape of the fuse unit. FIG. 3 is a cross-sectional view taken along the line AA in FIGS. 1 and 2 to show how the rotating pieces provided on the two covers shown in FIG. 1 are coupled to each other. FIG. 4 is an enlarged view of a coupling portion in the rotating piece.

  The fuse unit 1 of this embodiment is for supplying electric power supplied from a battery to a circuit. The fuse unit 1 includes one power terminal 11 to which power is supplied from a battery, three circuit terminals 12 connected to a circuit, and three fusible bodies 13. The power terminal 11 is formed of a conductive metal in a plate shape, and is provided with a through hole 11a for electrically and mechanically connecting the fuse unit 1 to the battery by screwing or the like. Each circuit terminal 12 is also formed in a plate shape with a conductive metal, and a terminal bolt 12a for connecting a round terminal provided at one end of an electric wire extending from the circuit by tightening a nut or the like is provided upright. The fusible body 13 electrically connects the power terminal 11 and the circuit terminal 12 and plays a role of preventing an overcurrent from flowing in the circuit by fusing when a current exceeding a threshold value flows. The fuse unit 1 is configured by covering (molding) a sheet metal structure (not shown) in which a power terminal 11, a circuit terminal 12, and a fusible body 13 are integrally formed with an insulating resin.

  The housing 14 made of an insulating resin is provided with three rectangular tubular storage chambers 141 for storing the fusible bodies 13 one by one in parallel. The front opening 141a and the back opening 141b in FIG. 1 of these three storage chambers 141 are closed with two covers 15 and 16 to prevent metal scattering when the fusible body 13 is melted. It is. These two covers 15 and 16 are both formed of a resin having transparency, and the melting of the fusible body 13 is visually recognized through the covers 15 and 16.

  In the housing 14, the two covers 15, 16 are inserted in the insertion directions D 1, D 2 intersecting the penetration direction of the respective storage chambers 141 to the positions where the two openings 141 a, 141 b are blocked, A pair of insertion paths 142 with the back side are provided. Each insertion path 142 includes a slit 142a provided in the partition wall 141c that partitions the three storage chambers 141, and an insertion port 142b provided in the outer wall 143 facing the rightmost partition wall 141c in FIG. It consists of.

  In the housing 14, each outer edge 15 a is in contact with the inner wall surface 144 a of the outer wall 144 standing upright on the left side in FIG. , 16a are fitted into the fitting grooves 144b.

  The two covers 15 and 16 pass through the insertion opening 142b of the right outer wall 143 and the slit 141d of the three partition walls 142a, respectively, and the outer edges 15a and 16a at the tips thereof are the fitting grooves 144b of the left outer wall 144. Is inserted in the insertion directions D1 and D2. Then, the outer edges 15a and 16a of the covers 15 and 16 are fitted into the fitting grooves 144b, so that the covers 15 and 16 are supported at positions where the openings 141a and 141b at both ends of the storage chamber 141 are closed.

  Here, each of the two covers 15 and 16 includes flat cover main bodies 151 and 161 and rotating pieces 152 and 162. The rotating pieces 152 and 162 are rotatable in the rotating directions D3 and D4 between the first posture shown by the solid line and the second posture shown by the dotted line in FIG. 161. Further, as shown in FIGS. 1 to 3, the rotating pieces 152 and 162 are pieces provided in a strip shape on the rear end sides in the insertion directions D1 and D2 in the covers 15 and 16, respectively. is there. A pair of rotating pieces 152 and 162 is provided on each of the covers 15 and 16 on the upper side and the lower side in FIG.

  The strip-shaped rotating pieces 152 and 162 have ends 152a and 162a that are rotatably connected to the cover main bodies 151 and 161, respectively. Specifically, the one ends 152a and 162a of the rotating pieces 152 and 162 are integrally connected to the cover main bodies 151 and 162, and the thickness of the connecting portions is thin. As shown in FIG. 1, the rotating pieces 152, 162 have their thinned ends 152 a, 162 a serve as hinges and can be rotated by the flexibility of the resin forming the covers 15, 16. ing.

  The rotating pieces 152 and 162 are arranged in the first posture shown by the solid line in FIG. 1 when the covers 15 and 16 are inserted. The covers 15 and 16 in this state are inserted from the insertion port 142b into the insertion path 142 in the insertion directions D1 and D2. Here, in this embodiment, after insertion, the rotating pieces 152 and 162 are located between the outer wall 143 on the right side of the housing 14 and the partition wall 141c facing the outer wall 143. The housing 14 is provided with a work window 145 for turning the turning pieces 152 and 162 positioned in this way after insertion into the turning directions D3 and D4 using a jig (not shown). Are provided on each of the front surface on the near side and the back surface on the back side.

  After the rotation, the rotation pieces 152 and 162 are placed on the inner surface of the right outer wall 143, that is, the inner wall surface 143a (see FIG. 2) facing the front of the insertion directions D1 and D2 inside the housing 14. Abut. The rotating pieces 152 and 162 rotated from the two covers 15 and 16 to the second posture are coupled to each other as will be described later while contacting the inner surface of the right outer wall 143. As a result, the two covers 15 and 16 are held in a state where they are prevented from coming off inside the housing 14.

  3A shows the rotating pieces 152 and 162 in the first posture before turning, and FIG. 3B shows the turning pieces 152 and 162 in the middle of turning. 3 (c) shows rotating pieces 152 and 162 that have been rotated and are in the second posture and are coupled to each other.

  A protrusion 141d that protrudes toward the right outer wall 143 and extends in the penetrating direction of the housing chamber 141 is provided at the approximate center of the partition wall 142a facing the right outer wall 143 in FIG. In the present embodiment, first, the pair of rotating pieces 162 in the cover 16 located on the back side in FIG. 1 and on the right side in FIG. 3 are rotated in the rotating direction D4 until they contact the protrusion 141d. Thereafter, the pair of rotating pieces 152 in the cover 15 located on the near side in FIG. 1 and the left side in FIG. 3 is in the rotating direction D3, and the other end 152b which is a free end is rotated in the other cover 16. It rotates so that it may overlap with the other end 162b which is a free end in the piece 162. FIG.

  Here, the other ends 152b and 162b of the rotating pieces 152 and 162 of the two covers 15 and 16, respectively, have a shape bent in a bowl shape as shown in FIG. 1 and FIG. . And as FIG. 3 shows, the rotation pieces 152 and 162 rotated to the 2nd attitude | position from each of the two covers 15 and 16 are what the other ends 152b and 162b of a bowl-shape couple | bond together. It has become.

  4 (a) shows the other end 152b of the rotating piece 152 of the cover 15 located on the near side in FIG. 1 and the left side in FIG. 3, bent in a bowl shape, the back side in FIG. The other end 162b bent in a bowl shape in the rotating piece 162 of the cover 16 located on the right side is shown in a side view. FIG. 4B shows a plan view of the other ends 152b and 162b of the rotating pieces 152 and 162 viewed in the direction of the arrow V1 in FIG. 4A.

  As shown in the enlarged view of FIG. 4, a protrusion 152c is formed on the other end 152b of the rotating piece 152 of the cover 15 located on the near side in FIG. 1 and on the left side in FIG. Is provided. 1 is provided with a hole 162c into which the projection 152c is fitted in the direction of arrow D5. The rotation piece 162 of the cover 16 located on the back side in FIG. 1 and the right side in FIG.

  In the present embodiment, the upper and lower ends of the two insertion openings 142b provided in the right outer wall 143 in FIG. 1 are saddle-shaped so that the saddle-shaped other end 152b with the projection 152c can pass through. It is a substantially C-shaped slit that is bent. On the other hand, the slit 142a provided in the partition wall 141c of the storage chamber 141 is a slit extending linearly in the vertical direction because only the cover main bodies 151 and 161 pass therethrough. For the insertion port 142b through which the cover 16 on which the protrusion 162 is not provided on the rotating piece 162 passes, the length of the branch hole that is bent and extended at the upper and lower ends can be shortened by the amount of the protrusion. Then, in order to simplify the processing, the shapes of the two insertion openings 142b are made common.

  As shown in FIG. 3 (c), when the rotating pieces 152, 162 of the two covers 15, 16 are rotated to the second posture, the other ends 152b, 162b bent in a bowl shape are coupled to each other. At the same time, the protrusion 152 c of one rotating piece 152 is fitted into the hole 162 c of the other rotating piece 162. By this connection and the insertion of the protrusion 152c, the rotating pieces 152, 162 of the two covers 15, 16 are combined. Then, the rotating pieces 152 and 162 are coupled in this manner, so that the two covers 15 and 16 are held in a state of being prevented from being detached inside the housing 14.

  According to the fuse unit 1 of the present embodiment described above, the two covers 15 and 16 that play the role of preventing metal scattering in the fusible body 13 by closing the openings 141a and 141b of the storage chamber 141 are formed in the opening 141a. 141b, the rotating pieces 152, 162 are held by being rotated to the second posture. At this time, the rotating pieces 152 and 162 are rotated to the second posture protruding along the out-of-plane direction of the cover main bodies 151 and 161 toward the other cover 15 and 16 facing each other. When the moving pieces 152 and 162 are rotated, the covers 15 and 16 are not deformed so as to increase the outer dimension in plan view. As described above, the cover 15, 16 has an enlarged external dimension in plan view from the attachment of the covers 15, 16 to the holding of the rotation pieces 152, 162 to the housing 14 by the rotation and coupling. No deformation occurs. For this reason, for example, the space allowance which anticipates the expansion of the external dimension at the time of attaching the covers 15 and 16 to the housing 14 like the approach space 52b demonstrated with reference to FIG. 6 is unnecessary. In the present embodiment, the housing 14 is reduced in size because such a space margin is unnecessary. As a result, the fuse unit 1 of the present embodiment achieves downsizing of the fuse unit 1 while providing the covers 15 and 16 for preventing metal scattering in the fusible body 13.

  Further, according to the fuse unit 1 of the present embodiment, the two covers 15 and 16 are simply inserted into the insertion path 142 until reaching the position for closing the openings 141a and 141b. For this reason, even during this insertion, the cover 15 or 16 is not deformed as described with reference to FIG. As described above, the cover 15, 16 has an enlarged external dimension in plan view from the insertion of the covers 15, 16 to the holding of the rotation pieces 152, 162 to the housing 14 by the rotation and coupling. No deformation occurs. Thereby, in this embodiment, the fuse unit 1 is further reduced in size.

  Further, according to the fuse unit 1 of the present embodiment, the rotating pieces 152 and 162 are rotated to the second posture, and are coupled to each other while being in contact with the inner wall surface 143a of the right outer wall 143 in FIG. As a result, the covers 15 and 16 are held inside the housing 14 while being prevented from coming off.

  As for the rotated pieces 152 and 162 after the rotation, if the covers 15 and 16 are prevented from coming off inside the housing 14, they do not come into contact with the inner wall surface 143a, and there is a slight gap. Good. However, it is advantageous that the rotating pieces 152 and 162 are brought into contact with the inner wall surface 143a in that the covers 15 and 16 in a state where the rotating pieces 152 and 162 are retained are stably held.

  Further, according to the fuse unit 1 of the present embodiment, the inner wall surface 144a with which the outer walls 15a and 16a on the distal end side in the insertion directions D1 and D2 in the cover bodies 151 and 161 of the outer wall 144 standing on the left side in FIG. Further, a fitting groove 144b into which the outer edges 15a and 16a are fitted is provided. In the fuse unit 1 of the present embodiment, the postures of the covers 15 and 16 inside the housing 14 are stabilized by fitting the outer edges 15a and 16a into the fitting grooves 144b.

  Further, according to the fuse unit 1 of the present embodiment, the insertion path 142 of the covers 15 and 16 in the housing 14 is provided in the partition wall 141c that divides the three storage chambers 141, and the slit through which the cover main bodies 151 and 161 penetrate. 142a is comprised. Thereby, stabilization of the attitude | position of the covers 15 and 16 in the insertion path 142 is achieved.

  Further, according to the fuse unit 1 of the present embodiment, a pair of rotating pieces 152 and 162 for each of the two covers 15 and 16 are provided, and two covers 15 and 16 are provided for each cover 15 and 16 respectively. They are coupled by the provided rotating pieces 152 and 162. Thereby, the holding | maintenance intensity | strength of the two covers 15 and 16 with respect to the housing 14 can be raised.

  Further, according to the fuse unit 1 of the present embodiment, the rotating pieces 152 and 162 rotated from the two covers 15 and 16 to the second posture are the other ends 152b and 162b bent in a bowl shape. They are connected to each other. In the fuse unit 1 of the present embodiment, the coupling strength of the rotating pieces 152 and 162 is enhanced by the coupling between the bent other ends 152b and 162b.

  Further, according to the fuse unit 1 of the present embodiment, the protrusion 152 c is provided on the other end 152 b of the rotating piece 152 of one cover 15, and is coupled to the rotating piece 162 of the other cover 16. A hole 162c into which the protrusion 152c is sometimes inserted is provided. In the fuse unit 1 of the present embodiment, the coupling strength of the rotating pieces 152 and 162 is further increased by fitting the protrusions 152c into the holes 162c.

  In addition, embodiment described above showed only the typical form of this invention, and this invention is not limited to these embodiment. That is, various modifications can be made without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the configuration of the fuse unit of the present invention is provided.

  For example, in the above-described embodiment, as an example of the housing referred to in the present invention, the housing 14 provided with three storage chambers 141 for storing the fusible bodies 13 one by one is illustrated. However, the housing referred to in the present invention is not limited to this. For example, one housing chamber that houses one fusible body may be provided, and the housing chamber that houses one fusible body one by one. Four or more may be provided.

  Moreover, in this embodiment, the square-chambered storage chamber 141 is illustrated as an example of the storage chamber said to this invention. However, the storage chamber referred to in the present invention is not limited to this, and may be, for example, a cylindrical one. The storage chamber according to the present invention does not ask the specific shape as long as it is cylindrical.

  Moreover, in this embodiment, the two covers 15 and 16 which have transparency are illustrated as an example of the two covers said to this invention. However, the two covers referred to in the present invention are not limited to this, and only one of the covers may have transparency.

  In the present embodiment, as an example of the insertion path according to the present invention, an insertion path 142 including a slit 142 a provided in the partition wall 141 c of the storage chamber 141 and an insertion port 142 b provided in the outer wall 143 of the housing 14 is provided. Illustrated. However, the insertion path referred to in the present invention is not limited to this. The insertion path referred to in the present invention is, for example, by disposing both end edges of the partition wall in the penetrating direction of the housing chamber at a position recessed from the outer surface of the housing by the thickness of the cover. It may be formed as a space through which the cover can pass on the rear side. As described above, the insertion path referred to in the present invention is specific if the cover is inserted to a position where the opening is closed in the insertion direction intersecting the penetration direction of the storage chamber and the insertion port is opened on the outer surface of the housing. It is not a question of the correct configuration.

  Further, in the present embodiment, as an example of the insertion groove according to the present invention, 15a provided on the inner wall surface 144a of the outer wall 144 with which the outer edges 15a and 16a in front of the covers 15 and 16 in the insertion directions D1 and D2 abut. , 16a is illustrated as an insertion groove 144b. However, the insertion groove referred to in the present invention is not limited to this, and may be, for example, a groove provided along the insertion path of the cover between the partition walls on the inner surface of the storage chamber. Side edges along the insertion direction of the cover main body are fitted into the grooves. As described above, the insertion groove according to the present invention does not ask a specific position or configuration as long as the outer edge is fitted into at least a part of the wall surface with which the outer edge of the cover body abuts.

  In the present embodiment, as an example of the housing according to the present invention, a work window 145 is provided for the operator to turn the turning pieces 152 and 162 of the covers 15 and 16, and the partition wall 141 c of the storage chamber 141 is provided. The housing 14 is illustrated in which the space between the outer wall 143 and the outer wall 143 is a working space for rotating the rotating pieces 152 and 162. However, the housing referred to in the present invention is not limited to this. In the housing according to the present invention, when there is a certain margin in the size of the storage chamber, for example, a space in the vicinity of the partition wall in the insertion direction in the storage chamber is a work space for rotating the rotating piece. It may be in the form used as

  Further, in the present embodiment, as an example of the rotating piece referred to in the present invention, the vicinity of one end 152a, 162a is formed thin and connected to the cover main body 151, 161, and the thin connecting portion serves as a hinge. The rotating pieces 152 and 162 that serve are illustrated. However, the rotating piece referred to in the present invention is not limited to this, and may be, for example, one that is rotatably connected to the cover body via a metal rotating shaft or the like. Thus, the specific connecting structure of the rotating piece referred to in the present invention is not limited as long as it is rotatably connected to the cover body.

  Further, in the present embodiment, as an example of the rotating piece referred to in the present invention, the other ends 152b and 162b are bent in a bowl shape, and a protrusion 152c is provided on the other end 152b, and the other end 162b is provided on the other end 162b. Illustrated are rotating pieces 152 and 162 in which a hole 162c is provided so that the other ends 152b and 162b of the bowl shape are coupled to each other and the protrusion 152c is fitted into the hole 162c. However, the rotating piece referred to in the present invention is not limited to this. The rotating piece referred to in the present invention may be, for example, one in which only the other end of the saddle type is coupled without providing a protrusion or hole, or it is simple without being formed into a saddle type. The other end of the plate shape may be bonded by bonding with an adhesive or the like. As long as the rotating pieces referred to in the present invention are connected to each other as described above, the specific connecting form is not limited.

  In the present embodiment, as an example of the fuse unit according to the present invention, the fuse unit 1 in which two covers 15 and 16 are inserted and attached to the insertion path 142 provided in the housing 14 is illustrated. In the fuse unit 1, the rotating pieces 152 and 162 rotated to the second posture are in contact with the inner wall surface 143 a so that the inserted covers 15 and 16 do not fall off from the insertion port 142 b. It is comprised so that it may couple | bond together. However, the fuse unit referred to in the present invention is not limited to this. The fuse unit according to the present invention may be, for example, one in which two covers are stacked on the front and back surfaces of the housing so as to close the opening of the housing body for the fusible body. In this example, the rotating pieces of the two covers stacked as described above are rotated to the second posture and coupled to each other, whereby the two covers are held by the housing. .

DESCRIPTION OF SYMBOLS 1 Fuse unit 13 Fusible body 14 Housing 15, 16 Cover 15a, 16a Outer edge 141 Accommodating chamber 141c Partition wall 142 Insertion path 142a Slit 142b Insertion port 143, 144 Outer wall 143a, 144a Inner wall surface 144b Insertion groove 151, 161 Cover body 152, 162 Rotating pieces 152a, 162a One end 152b, 162b The other end 152c Projection 162c Hole D1, D2 Insertion direction

Claims (8)

A soluble body,
A housing provided with a housing chamber in which the fusible body is housed in one direction; and
Two plate-like members that respectively close the openings at both ends in the storage chamber, and at least one of the two covers having transparency,
Each of the two covers has a flat cover body, a first posture extending along an in-plane direction of the cover body, and an out-of-plane direction of the cover body so as to face the other cover facing the cover body. A pivot piece coupled to the cover body so as to be pivotable between a second posture projecting along;
The rotating piece is arranged in the first posture when the cover is attached to the housing, and is rotated to the second posture after being attached;
The fuse unit is configured such that rotating pieces rotated from the two covers to the second posture are coupled to each other.   In the housing, there are two insertion paths each having the insertion opening opened on the outer surface of the housing, in which each of the two covers is inserted to a position where the opening is closed in the insertion direction intersecting the penetration direction of the storage chamber. The fuse unit according to claim 1, wherein the fuse unit is provided. The rotating piece is rotated to the second posture after the insertion, and comes into contact with an inner wall surface facing the front in the inserting direction inside the housing,
3. The fuse according to claim 2, wherein the rotating pieces rotated to the second posture from each of the two covers are configured to be coupled to each other while being in contact with the inner wall surface. unit.   The insertion groove into which the said outer edge is inserted is provided in the at least one part inner wall surface which the outer edge of the said cover main body of each of the said two covers contacts in the said housing. Fuse unit. A plurality of the storage chambers are arranged in the insertion direction and provided in the housing;
The fuse according to any one of claims 2 to 4, wherein the insertion path includes a slit provided in a partition wall that partitions the storage chamber and through which the cover body passes. unit.   A pair of the rotating pieces of each of the two covers are provided so as to face each other when rotated to the second posture. The fuse unit described in the section. The rotating piece is formed in a strip shape, and one end of the rotating piece is rotatably connected to the cover body and the other end is bent in a bowl shape.
7. The fuse according to claim 1, wherein the other ends of the rotating pieces rotated from the two covers to the second posture are coupled to each other. unit.   A hole in which the other end bent in a hook shape in the rotating piece of one of the two covers is fitted in the other cover is provided in the rotating piece of the other cover. The fuse unit according to claim 7.

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