JP5191356B2 - Fuse puller - Google Patents

Description

  The present invention relates to a fuse puller for extracting a blade-type fuse attached to an electrical junction box or the like.

FIG. 7 shows a conventional general fuse puller.
The fuse puller 61 includes a pair of left and right gripping rods 62 and a spring portion 63 that connects the pair of gripping rods 62 and biases the distal end side of the gripping rod 62 in the closing direction. It has the operation part 64 for opening.

  For example, the fuse 10 is disposed perpendicularly to a fuse mounting portion at the top of an electrical junction box (not shown), and an operator can insert a tip claw portion 65 of the fuse puller 61 into a groove 10b below the head of the fuse 10 for maintenance or the like. Are engaged, and the fuse puller 61 is pulled upward, whereby the fuse 10 is pulled out from the fuse mounting portion and detached.

  The fuse 10 is a small blade-type fuse in which a pair of male tab terminals 10c are provided in front and rear of a body portion 10d made of an insulating resin, and has a horizontal groove 10b between the body portion 10d and the head portion 10a. The body portion 10d has a soluble portion (not shown) that connects the pair of tab terminals 10c.

  FIG. 8 shows another form of a conventional fuse puller proposed by the present applicant (see Patent Document 1).

  The fuse puller 71 includes a pair of left and right leg portions 72, a wave-like spring portion 73 formed integrally with each leg portion 72, a top plate 74 that connects both leg portions 72, and a top plate 74 that is suspended from the top plate 74. It consists of a pair of left and right claw portions 75.

  The fuse 76 is provided so as to protrude upward from an upper wall 77 such as a junction box body made of an insulating resin of an electrical junction box. In the fuse mounting portion 78 on the upper wall side, each leg portion of the fuse puller 71 is provided on the left and right sides of the fuse 76. A recess 79 for allowing the distal end of 72 to enter is provided, the body portion of the fuse 76 is exposed upward, and a pair of male terminals 76 c of the fuse 76 are connected to a female terminal 81 on the circuit side in the accommodation chamber 80. The head 76a of the fuse 76 is formed wider than the body.

For maintenance or the like, the operator moves the leg portion 72 of the fuse puller 71 into the recess 79 and positions it, presses the top plate 74 strongly downward to compress the spring portion 73, and compresses the claw portion 75 of the fuse 10. Engage with the lower surface of the head 10a. When the hand is released from the top plate 74, the fuse 76 is automatically extracted while the spring portion 73 is restored (expanded).
Japanese Patent Laid-Open No. 10-255640 (FIG. 2)

  However, the conventional fuse puller 61 of FIG. 7 requires a space (see arrow A) for pulling the fuse puller 61 upward by hand on the upper side of a fuse mounting portion such as an electric junction box. In some cases, it is difficult to remove the fuse 10 in a narrow space.

  Further, in the conventional fuse puller 71 of FIG. 8, if the positioning portion 79 for the leg portion 72 is not provided in the connection box main body or the like, the inner claw portion 75 and the head portion 76 a of the fuse 76 are engaged. It cannot be performed smoothly (because it cannot be seen), and it is necessary to project the fuse 76 to the outside from the upper wall 77 on the connection box body side. Therefore, it is applicable to the fuse embedded in the fuse mounting part. There was a concern that the shape on the side of the junction box body was restricted.

  Moreover, it is necessary to strongly press the tip of the leg portion 72 against the upper wall 77 of the connection box body, and a space for pressing is required including the operator's hand, and the upper wall 77 of the connection box body is thin. When formed, there was a concern that the upper wall 77 could be damaged. These concerns can occur in the same way when the fuses 10 and 76 are inserted and removed not only in the upper part (vertical direction) of the electrical junction box or the like but also in the side part (horizontal direction).

  In view of the above points, the present invention does not require a large space for the operation of removing the fuse, and can also be applied to a fuse embedded in the fuse mounting portion. It aims at providing the fuse puller which can be extracted from.

  In order to achieve the above object, a fuse puller according to claim 1 of the present invention has one end of a pair of link plates rotatably connected to the inside of a peripheral wall, and the other end of the pair of link plates is a pair of grips. The link plate is rotated in the fuse removal direction by moving the peripheral wall in the fuse direction in a state in which the fuse is rotatably connected to one end of the leg and the fuse is held on the other end side of the gripping leg. A gripping leg extracts the fuse from the fuse mounting portion.

  With the above structure, the fuse is gripped by the gripping leg, the link plate is rotated upward as the peripheral wall is lowered, for example, the gripping leg is lifted together with the fuse, and the fuse is extracted from the mounting portion. The link plate may be elastically bent when rotating, and the gripping leg may be raised with its restoring force as an auxiliary force. The pair of gripping legs are maintained substantially parallel by the link plate being bent (bent). The direction in which the fuse is drawn out (arrangement of the fuse) is not limited to vertical but may be horizontal.

  The fuse puller according to claim 2 is provided with a pair of spring portions on the inner side of the peripheral wall, and a puller main body is inserted along the pair of spring portions, and the puller main body includes a pair of gripping legs and both mountain peaks. And the crest has at least one inclined surface near the tip of the gripping leg, the tip of the gripping leg grips the fuse, and the peripheral wall is moved in the fuse direction so that the spring part Is elastically brought into contact with the one inclined surface to bias the puller body in the direction of extracting the fuse.

  With the above configuration, the fuse is gripped by the gripping leg, and when the peripheral wall is lowered, for example, the spring portion is pressed outward by the peak portion of the puller body, and elastically contacts one of the inclined surfaces (lower side) of the peak portion with a restoring force. Thus, an upward force acts on the puller main body, the puller main body rises integrally with the fuse, and the fuse is extracted from the fuse mounting portion. The direction in which the fuse is drawn out (arrangement of the fuse) is not limited to vertical but may be horizontal.

  The fuse puller according to claim 3 is the fuse puller according to claim 2, wherein the peak portion has the other inclined surface opposite to the one inclined surface, and the spring portion is on the other inclined surface. The gripping leg grips the fuse in a contact state.

  With the above configuration, when the distal end portion of the flexible gripping leg is pressed and engaged with the head portion of the fuse, the spring portion comes into contact with the other inclined surface of the puller body and receives the pressing force. By lowering the peripheral wall in a state where the fuse is engaged and held at the distal end portion of the gripping leg, the spring portion smoothly contacts the other inclined surface of the puller body.

  A fuse puller according to a fourth aspect is the fuse puller according to the second or third aspect, wherein the spring portion is formed in an arm shape.

  With the above configuration, the folded portion (the vicinity of the base portion) of the arm-shaped spring portion following the peripheral wall and the vicinity thereof strongly elastically contact one of the inclined surfaces of the puller body to urge the puller body upward.

  A fuse puller according to a fifth aspect is the fuse puller according to the second or third aspect, wherein the spring portion has at least a plate-like inclined portion inclined inward.

  With the above configuration, when the peripheral wall is lowered, for example, the inclined portion of the spring portion elastically contacts one (lower side) inclined surface of the peak portion of the puller body, so that an upward force acts on the puller body.

  A fuse puller according to a sixth aspect of the present invention is the fuse puller according to the fifth aspect, wherein the spring portion is bent and formed in a substantially U shape, and one inclined surface near the tip of the gripping leg of the spring portion is formed on the peak portion. The other inclined surface of the inclined portion that is in contact with the other inclined surface and is opposite to the one inclined surface of the spring portion elastically contacts with one inclined surface of the peak portion.

  With the configuration described above, the tip of the gripping leg is pressed against the head of the fuse and engaged with one (lower) inclined surface of the spring portion in contact with the other inclined surface of the puller body. Further, as the peripheral wall descends, one inclined surface of the spring portion smoothly contacts the other inclined surface of the puller body.

  A fuse puller according to a seventh aspect is the fuse puller according to the sixth aspect, wherein an auxiliary operation portion is provided on one inclined surface side of the spring portion.

  With the above configuration, when the fuse extraction force is greater than the spring force, the fuse is reliably extracted with spring force + pressing force by pressing the auxiliary operation portion inward.

  According to the invention of claim 1, since the extraction of the fuse is started simultaneously with the pressing of the peripheral wall, it is not necessary to strongly hit the peripheral wall against the fuse mounting portion as in the conventional case, and the fuse extraction operation is facilitated. Since the pressing of the peripheral wall can be performed not only from the top but also from the side, a large operation space above is unnecessary, and it can be applied to a narrow space such as an engine room of an automobile. In addition, since the fuse embedded in the fuse mounting portion can be gripped by a pair of gripping legs, it can be applied to fuse mounting portions such as various electrical junction boxes without being restricted by the shape of the fuse mounting portion side. it can.

  According to the second aspect of the present invention, since the fuse is extracted by a spring force as the peripheral wall is pushed down, it is not necessary to strongly hit the peripheral wall against the fuse mounting portion as in the conventional case, and the fuse extraction operation is facilitated. At the same time, the peripheral wall can be pushed down not only from the top but also from the side, so that a large operating space is unnecessary and it can be applied to a narrow space such as an engine room of an automobile. In addition, since the fuse embedded in the fuse mounting portion can be gripped by a pair of gripping legs, it can be applied to fuse mounting portions such as various electrical junction boxes without being restricted by the shape of the fuse mounting portion side. it can.

  According to the third aspect of the present invention, it is possible to smoothly and reliably perform the operation of pressing and engaging the distal end portion of the gripping leg against the fuse without raising the puller body. Further, since the spring portion smoothly slides along the other inclined surface of the puller body, the lowering operation of the peripheral wall can be performed smoothly without being caught.

  According to the fourth aspect of the present invention, the puller main body can be reliably moved in the fuse-releasing direction by using the strong spring force on the base side of the arm-shaped spring portion.

  According to the fifth aspect of the present invention, the shape of the spring portion can be simplified to a substantially plate shape to achieve compactness and cost reduction.

  According to the sixth aspect of the present invention, it is possible to smoothly and reliably perform the operation of pressing and engaging the distal end portion of the gripping leg against the fuse without raising the puller body. Further, since the spring portion smoothly slides along the other inclined surface of the puller body, the lowering operation of the peripheral wall can be performed smoothly without being caught.

  According to the seventh aspect of the present invention, when the pull-out force of the fuse is larger than the spring force, the fuse can be reliably pulled out by pressing the auxiliary operation portion inward, whereby various terminals are provided. Applicable to fuses with contact pressure.

  FIG. 1 shows an application example of the first embodiment of the fuse puller according to the present invention, and FIG. 2 shows the operation of the fuse puller.

  The fuse puller 1 is integrally formed of a synthetic resin material, and is formed of a pair of links that are formed so as to protrude in a slanted manner from a rectangular cylindrical peripheral wall 2 and two wall portions 3 that are opposed to each other in the peripheral wall 2. The plate 7 (FIG. 2) and a pair of plate-like fuse gripping legs 8 that are long and downwardly hung from the tip of each link plate 7 are configured.

  The peripheral wall 2 is composed of front, rear, left and right vertical wall portions 3, 4, one end 7 a of the link plate 7 is pivotally connected to the upper ends of the left and right wall portions 3, and the other end 7 b of the link plate 7 is connected to the upper end of the link plate 7. The upper end of the gripping leg 8 is hingedly connected to the upper end. One end 7a and the other end 7b of the link plate 7 are formed in a thin hinge shape, and are connected to the peripheral wall 2 and the gripping leg 8 by the hinge-like portions (7a, 7b). Each link plate 7 is formed symmetrically, has rigidity when it is straight, and exhibits strong spring properties like a leaf spring when bent. In the lower half of the left and right wall portions 3, a rectangular cutout opening 9 for visualizing a fuse or the like is formed.

  Each holding leg 8 extends in a straight plate-like shape in a straight plate shape, and has a pair of upper and lower horizontal fuse holding ribs (fuse holding portions) 8a and 8b on the tip (lower end) side, and is arranged symmetrically. . As shown in FIG. 2A, in the state where each link plate 7 is inclined downward (contained in the peripheral wall 2), the ribs 8a and 8b on the distal end side of the gripping legs 8 are the lower openings 2a of the peripheral wall 2. Projects downward (exposed) from

  As shown in FIG. 2B, the ribs 8 a and 8 b on the front end side of the gripping legs 8 are in the peripheral wall 2 in a state where each link plate 7 is inclined upward (a state protruding upward from the upper opening 2 b of the peripheral wall 2). Located in. In this example, the gripping legs 8 are connected to only the link plates 7, but for example, the longitudinal intermediate portions of the gripping legs 8 can be connected to each other by a connecting piece (not shown).

  In the example of FIG. 1, the fuse 10 is mounted on the fuse mounting portion 12 on the top of the insulating resin fuse block 11, and the fuse block 11 is placed in a synthetic resin rectangular frame frame (junction box body) (not shown). It is inserted from below and locked by a locking arm (locking means) 13.

  A relay block, a connector and the like (not shown) are similarly assembled in the frame. The upper opening of the frame is covered with an upper cover (not shown) to protect the fuse 10 and the like, and the lower opening of the frame is covered with a lower cover (not shown) to protect the electric wire connected to the fuse 10 and the like. The

  FIG. 1 is merely an example. For example, the fuse puller 1 can be applied to a case where a fuse 10 is mounted on a fuse mounting portion of a bottomed electrical connection box body (not shown). The same applies to other embodiments described later. In the specification, the front, rear, left, and right directions are for convenience of explanation.

  As shown in FIGS. 1 and 2C, the front and rear wall portions 4 of the peripheral wall 2 of the fuse puller 1 are arranged at substantially the same interval as the vertical wall portion 12 a before and after the fuse mounting portion 12. The notch opening 9 in the wall 3 is arranged with a width approximately the same as the head 10 a of the fuse 10. As shown in FIG. 2A, the distance between the left and right wall portions 3 of the peripheral wall 2 is about twice as wide as the pitch of each fuse 10. The magnitude | size shape of the surrounding wall 2 is the same also in each embodiment mentioned later.

  The distance between the inner surfaces of the pair of gripping legs 8 is approximately the same as the thickness of the fuse 10, and the protruding length of the gripping ribs 8 a and 8 b protruding from the inner surface is the depth of the groove 10 b below the head 10 a of the fuse 10. It is about the same.

  The length of each gripping leg 8 is approximately the same as the height of the peripheral wall 2, and the length of the link plate 7 is the plate of the gripping leg 8 from the half of the distance between the inner surfaces of the left and right wall portions 3 of the peripheral wall 2. It is below the dimension excluding the thickness. As shown in FIGS. 2A and 2B, the pair of link plates 7 are moved up and down in the space in the peripheral wall 2 so that the pair of gripping legs 8 are moved up and down. At that time, each link plate 7 is slightly elastically bent, and each gripping leg 8 is slightly inclined inward from parallel.

  The operation of extracting the fuse 10 is performed as follows. First, as shown in FIG. 2A, in a state where each gripping leg 8 is lowered and protrudes downward from the peripheral wall 2 (each link plate 7 is inclined downward), the operator grips the peripheral wall 2 and faces downward. The rib 8a at the tip of each gripping leg 8 is moved over the head 10a of the fuse 10 and engaged. At this time, the tip end side of each gripping leg 8 bends outward to allow the rib 8a to get over.

  The upper rib 8b abuts against the upper surface of the head 10a and prevents the gripping leg 8 from being pushed further. It is also possible to engage the rib 8a and the head 10a in a state where a finger is put in the peripheral wall 2 and the upper end of each gripping leg 8 is pressed. The peripheral wall 2 can be gripped by hand horizontally from the side (when there is no space on the upper side).

  Then, in this state, as shown in FIG. 2 (b), each link 2 is strongly pressed down so that the upper end of each gripping leg 8 fixed to the head 10a of the fuse 10 (substitute with reference numeral 7b) serves as a fulcrum. The plate 7 is rotated upward, and accordingly (at the same time), each gripping leg 8 is raised integrally with the fuse 10. Thereby, the fuse 10 is extracted from the fuse mounting portion 12.

  In the fuse mounting portion 12, each tab terminal 10 c of the fuse 10 is connected to a lower female terminal (not shown), and the female terminal is connected to a circuit (not shown) such as an electric wire or a bus bar in the fuse block 11. Therefore, when the fuse 10 is removed, the connection between the tab terminal 10c of the fuse 10 and the lower female terminal is released. As shown in FIG. 2C, it can be visually confirmed from the notch opening 9 on the side portion of the peripheral wall 2 whether or not the fuse 10 has been reliably extracted.

  The extraction of the fuse 10 is started immediately after FIG. 2A between FIG. 2A and FIG. 2B, and the extraction is completed in FIG. 2B. That is, in FIG. 2 (a), as the peripheral wall 2 moves downward, each elastic link plate 7 curves upward and exhibits a spring force, and the gripping leg 8 is lifted by the spring force. As a result, the extraction of the fuse 10 is started, and the spring force is eliminated in a state where each link plate 7 is restored to the diagonally upward direction as shown in FIG. 2B (the diagonally downward link plate 7 in FIG. 2A). In the same manner, the fuse 10 is maintained in a state in which the fuse 10 is gripped by the gripping legs 8 in the peripheral wall 2 without dropping.

  In FIG. 2B, the lower end 2a of the peripheral wall 2 is not strongly pressed against the upper surface 11a of the fuse block 11 (fuse mounting portion 12), and a puller like the conventional example (FIG. 8) is applied to the upper surface 11a of the fuse block 11. There is no need to form a special surface for contact.

  Further, the fuse 10 may be accommodated in the accommodation chamber (cavity) 14 of the fuse block 11 and is mounted so as to protrude upward from the fuse block 11 as in the conventional example (FIG. 8). May be.

  2A is pushed down from the state shown in FIG. 2A, and the link plate 7 is made to be convex upward in a state where the lower end 2a of the peripheral wall 2 is in contact with the upper surface 11a of the fuse block 11 as shown in FIG. It is also possible to bend (the bend is eliminated in the embodiment of FIG. 2B) and to exert an upward spring force to raise each gripping leg 8 together with the fuse 10. However, in this case, it is necessary to bring the lower end 2a of the peripheral wall 2 into contact with the upper surface 11a of the fuse block 11.

  It is also possible to assemble the peripheral wall 2, the link plate 7, and the gripping legs 8 separately. In this case, it is also possible to increase the spring force by forming only the link plate 7 from a metal material. One end 7a and the other end 7b of the metal link plate 7 are hingedly connected to the peripheral wall 2 and the gripping leg 8, respectively.

  The same applies to the example of FIG. 2, but it is also possible to prevent the gripping legs 8 from opening and closing too much by connecting the intermediate portions of the gripping legs 8 together with a connecting piece (not shown). Alternatively, it is also possible to form a guide groove or the like (a guide portion not shown) in the height direction in which the gripping leg 8 is slidably engaged with the inner surface of the peripheral wall 2. Moreover, in FIG. 2, it is also possible to arrange | position the edge part 7a of the link board 7 not in the upper end 2b of the surrounding wall 2, but the height direction intermediate part.

  FIG. 3 shows an application example of the second embodiment of the fuse puller according to the present invention, and FIG. 4 shows the operation of the fuse puller.

  As shown in FIG. 3, the fuse puller 21 is composed of two parts made of synthetic resin. The fuse puller 21 includes a rectangular cylindrical peripheral wall 22 and a pair of arm-like spring portions 23 provided in the peripheral wall 22. A member (holder) 24 and a puller body 25 capable of moving up and down along the spring portion 23 in the space in the peripheral wall 22 as shown in FIG.

  Since the insulating resin fuse block 11 and the fuse 10 in FIG. 3 are the same as those in the embodiment of FIG. 1, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the peripheral wall 22 is composed of front, left, right, and left vertical walls 26 and 27, and a notch opening 30 is provided upward from the lower ends of the left and right walls 26, and as shown in FIG. A pair of spring portions 23 are integrally formed so as to protrude upward from the notch opening 30 on the inner surface side of the portion 26. Each spring part 23 is comprised by the folding | returning part 23a which continues integrally in the substantially U shape from the notch opening 30, and the inclination part 23b which inclines outward from the folding | returning part 23a and was extended upwards.

  As shown in FIG. 3, the puller body 25 includes a rectangular top plate portion 31, a pair of flexible left and right fuse gripping legs 32 suspended from the top plate portion 31, and a gripping leg 32 (or a trunk portion above it). ) Are connected to each other at the center in the height direction. The outer surface of the gripping leg 32 protrudes outwardly on both the left and right sides of the connecting portion 33. The mountain-shaped portion 34 has an upper inclined surface 34a and a lower inclined surface 34b, and the upper inclined surface 34a. The skirt of the upper half of the puller body 25 continues to the vertical outer surface of the narrow portion (body portion) 35, and the skirt of the lower inclined surface 34 b continues to the lower end of the gripping leg 32.

  The full length of the puller body 25 is set longer than the total height of the peripheral wall 22. A stopper protrusion 36 is provided on the outer surface of the narrow upper half portion 35 of the puller body 25, and the outer surface of the upper half portion 35 continues to the lower surface of the wide top plate 31. The width of the crest 34 of the gripping leg 32 is slightly wider than the width of the top plate 31.

  As shown in FIG. 4A, when the upper end of the puller body 25 is positioned on the same plane as the upper wall of the peripheral wall 21, the portion 23 a ′ on the folded portion 23 a side of the spring portion 23 is above the peak portion 34 of the puller body 25. Elastically contact with the inclined surface 34a, thereby pulling the puller body 25 downward. When the stopper projection 36 abuts on the upper inclined surface 23b of the spring portion 23, the puller body 25 is prevented from further descending.

  In this state, the operator grips the peripheral wall 22 by hand and presses the gripping rib (fuse holding portion) 37a at the tip of the puller body 25 against the head 10a of the fuse 10 from above, so that both gripping legs 32 are removed. The rib 37a engages with the head 10a as shown in FIG. The upper rib 37b abuts against the head 10a and prevents further pulling of the puller body 25. The puller body 25 is held by the support member 24 without moving up and down.

  Next, as shown in FIG. 4 (b), the spring portion 23 is attached to the puller body 25 by pressing down firmly while holding the peripheral wall 22 by hand (the peripheral wall 22 can be gripped by hand instead of from above). It slides downward along the mountain portion 34 and elastically contacts the lower inclined surface 34b of the mountain portion 34. The lower end 22a of the peripheral wall 22 abuts on the upper surface 11a of the fuse block 11 (fuse mounting portion 12) and stops.

  The spring portion 23 is greatly expanded (expanded) from the folded portion 23a to the inclined portion 23b (the folded portion 23a and the subsequent portion 23a ′), and the lower inclined surface 34b of the peak portion 34 of the puller body 25 faces upward. Strongly urge (press) diagonally upward. At least the inward apex 23a 'of the spring portion 23 elastically contacts the lower inclined surface 34b.

  As a result, as shown in FIG. 4C, the puller body 25 rises with the fuse 10 held, and the fuse 10 is extracted from the fuse mounting portion 12 of the fuse block 11. The inclined portion 23 b of the spring portion 23 is in contact with the inclined surface 34 b on the lower side of the peak portion 34 of the puller body 25 almost entirely to hold the puller body 25. The fuse 10 is held by the gripping legs 32 of the puller body 25 without dropping.

  If the top plate 31 of the puller main body 25 is pushed down with a finger, the fuse 10 is exposed to the outside from the peripheral wall 22 and the removal of the fuse 10 from the gripping leg 32 is facilitated, and the initial state of FIG. .

  It is also possible to delete the protruding portion (upper half portion) 35 of the puller main body 25 in FIG. 4C, and to make the puller main body 25 only by the lower half portion. The same applies to the third embodiment described later.

  Further, the peak portion 34 of the puller body 25 can be formed in a substantially right triangle shape by a lower inclined surface 34b, an upper horizontal surface (not shown), and a short inclined or curved surface on the top side connecting both surfaces. It is. However, in this case, a large force is required for the pushing operation of the peripheral wall 22 in FIG.

  FIG. 5 shows an application example of the third embodiment of the fuse puller according to the present invention, and FIG. 6 shows the operation of the fuse puller.

  The fuse puller 41 is similar to the fuse puller 21 shown in FIGS. 3 to 4 and is composed of two parts made of synthetic resin as a material, as shown in FIG. 5, and has a rectangular cylindrical peripheral wall 42 and a peripheral wall 42. A support member (holder) 44 including a pair of leaf springs or arms (provided with an auxiliary operation part) provided in the inside and a space in the peripheral wall 42 as shown in FIG. It is comprised with the puller main body 45 which can be raised / lowered along.

  The fuse block 11 and the fuse 10 made of insulating resin in FIG. 5 are the same as in the embodiment of FIG. 1, and the puller main body 45 is the same as the puller main body 25 of FIG. Detailed description will be omitted.

  The peripheral wall 42 of the support member 44 is composed of front, rear, left and right vertical wall portions 46, 47, and two notched (left and right) wall portions 46 are provided with rectangular cutout openings 48 from the lower end to the upper half portion. A pair of spring portions 43 are provided symmetrically so as to be inclined substantially linearly inward from the upper end of the opening 48.

  As shown in FIG. 6, the spring portion 43 includes an inwardly inclined portion 43a and a block-shaped pressing portion 43b integrally provided at the lower end of the inclined portion 43a. The inclined portion 43a has an inwardly inclined surface (upper side). (Inclined surface) 43c, and the pressing portion 43b has an inclined surface (lower inclined surface) 43d that is bent outward from the inwardly inclined surface 43c of the inclined portion 43a outwardly in a substantially square shape. .

  In a free state of the spring portion 43 (a state where no pressing force is applied), the inclined portion 43a continues to the wall portion 46 in a substantially square shape. The pressing portion 43b is formed in a rectangular block shape, protrudes horizontally from the notch opening 48, and has a non-slip protrusion 43e for pressing operation on the protruding outer surface. The pressing operation of the pressing portion 43b from the outside is auxiliary, and the fuse 10 is normally extracted only by the restoring force of the spring portion 43.

  As shown in FIG. 6A, the inclined surface (lower inclined surface) 43d of the pressing portion 43b of the spring portion 43 is formed in a state where the pair of gripping legs 32 of the puller body 45 protrudes downward from the lower end 42a of the peripheral wall 42. The puller body 45 is elastically contacted with the upper inclined surface 34 a of the peak portion 34. The stopper projection 36 in the upper half of the puller main body 45 abuts against the inner surface 43c of the inclined portion 43a of the spring portion 43, so that further lowering of the puller main body 45 is prevented. The lower inclined surface 43d abuts on the upper inclined surface 34a to prevent the puller body 45 from being lifted. In this state, the ribs 37a at the tips of the pair of gripping legs 32 are pressed against the head 10a of the fuse 10. Engage.

  Next, as shown in FIG. 6B, the spring portion 43 is bent outward along the peak portion 34 of the puller main body 45 by pushing down the peripheral wall 42 against the bias of the spring portion 43, and the spring portion 43. The upper inclined surface 43c elastically contacts the lower inclined surface 34b of the puller body 45. Both spring portions 43 urge the puller main body 45 inward with a strong force and pinch it. The lower end 42a of the peripheral wall 42 abuts on the upper surface 11a of the fuse block 11 and is prevented from being pushed further.

  Due to the urging force of the spring portion 43, as shown in FIG. 6C, the puller main body 45 is pressed upward while holding the fuse 10, the puller main body 45 is raised, and the fuse 10 is attached to the fuse block 11. Extract from part 12. In FIG. 6B, when the contact force between the male terminal 10 c of the fuse 10 and the counterpart female terminal (not shown) is strong and the fuse 10 is difficult to come out, the outer surface of the pressing portion 43 b of both spring portions 43. By pressing and pressing 43e inward with fingers, the fuse 10 is reliably extracted with spring force + finger pressing force.

  The fuse 10 is held by the gripping legs 32 of the puller body 45 without dropping. By lifting the fuse puller 41 and pushing the top plate 31 of the puller main body 45 downward, the fuse 10 is exposed to the outside of the peripheral wall 42 and the initial state of FIG. 6A is obtained.

  5 and 6, the pressing portion (auxiliary operation portion) 43b including the lower inclined surface 43d is excluded, and the spring member 43 is formed only by the plate-like inward (upper) inclined portion 43a. It is also possible to configure. In this case, a short outwardly inclined or curved portion (not shown) is provided at the lower end of the inclined portion 43a so that the sliding contact with the peak portion 34 of the puller main body 45 is performed smoothly. Then, the upper inclined surface 34a of the puller main body 45 is eliminated, and the ridge portion 34 is formed by a short inclined or curved surface (not shown) that connects both the lower inclined surface 34b and the upper horizontal surface (not shown). It is also possible to form a substantially right triangle.

  The configuration of each of the above embodiments is effective not only as the fuse puller itself, but also as a fuse extraction structure or a fuse extraction method using the fuse pullers 1, 21 and 41. Further, the fuse 10 is not limited to the one in the electric junction box, but may be one in which a small fuse box or a fuse block is used alone. When applied to the fuse 10 of the electrical junction box, the fuse pullers 1, 21 and 41 are preferably mounted as fixtures in the electrical junction box.

  In addition, the peripheral walls 2 and 42 in each of the above-described embodiments are configured by three-side wall portions instead of four-side wall portions, and one of them can be left open (however, the two opposing wall portions 26 and 46 are It is necessary not to bend against the force of the spring parts 23 and 43).

  Further, the fuse 10 in each of the above embodiments is vertically arranged with the head portion 10a facing upward, and the fuse pullers 1, 21, 41 are arranged above the fuse 10 and the fuse is vertically extracted. It is also possible to dispose the fuse 10 horizontally by disposing it horizontally in a block or the like and disposing the fuse pullers 1, 21, 41 to the side.

1 is a perspective view (an enlarged view in a circle) showing an application example of a first embodiment of a fuse puller according to the present invention. Similarly, the operation of extracting a fuse with a fuse puller is shown in the order of operation, (a) and (b) are longitudinal sectional views, and (c) is a side view corresponding to (b). It is a perspective view (an inside circle is an exploded perspective view) showing an example of application of a second embodiment of a fuse puller concerning the present invention. (A)-(c) is a longitudinal cross-sectional view which shows the effect | action which extracts a fuse similarly with a fuse puller in order. It is a perspective view (an inside circle is an exploded perspective view) showing an example of application of a third embodiment of a fuse puller concerning the present invention. (A)-(c) is a longitudinal cross-sectional view which shows the effect | action which extracts a fuse similarly with a fuse puller in order. It is a front view which shows the conventional general fuse puller. It is a longitudinal cross-sectional view which shows the example of application of the other form of the conventional fuse puller.

Explanation of symbols

1, 21, 41 Fuse puller 2, 22, 42 Peripheral wall 7 Link plate 8, 32 Grasping leg 10 Fuse 12 Fuse mounting part 23, 43 Spring part 25, 45 Puller body 34 Mountain part 34a The other (upper) inclined surface 34b (Lower) inclined surface 43a inclined portion 43b pressing portion (auxiliary operation portion)
43c The other (upper) inclined surface 43d The one (lower) inclined surface

Claims (7)

  One end of a pair of link plates is rotatably connected to the inside of the peripheral wall, the other end of the pair of link plates is rotatably connected to one end of the pair of gripping legs, and a fuse is connected to the other end of the gripping legs. The fuse puller, wherein the link plate is rotated in the fuse removing direction by moving the peripheral wall in the fuse direction in a state where the fuse is gripped, and the gripping leg extracts the fuse from the fuse mounting portion.   A pair of spring portions are provided inside the peripheral wall, and a puller main body is inserted along the pair of spring portions. The puller body has a pair of gripping legs and ridges on both sides. The spring portion is elastically contacted with the one inclined surface by moving the peripheral wall in the fuse direction with at least one inclined surface near the tip of the leg, and with the tip of the gripping leg holding the fuse. And a bias puller for urging the puller body in the direction of extracting the fuse.   The crest portion has the other inclined surface opposite to the one inclined surface, and the holding leg holds the fuse in a state where the spring portion is in contact with the other inclined surface. The fuse puller according to claim 2.   4. The fuse puller according to claim 2, wherein the spring portion is formed in an arm shape.   4. The fuse puller according to claim 2, wherein the spring portion has at least a plate-like inclined portion inclined inward.   The spring portion is formed in a substantially U-shape, and one inclined surface near the tip of the gripping leg of the spring portion is in contact with the other inclined surface of the peak portion, and the one inclined surface of the spring portion is 6. The fuse puller according to claim 5, wherein the other inclined surface of the inclined portion on the opposite side is in elastic contact with one inclined surface of the peak portion.   The fuse puller according to claim 6, wherein an auxiliary operation portion is provided on one inclined surface side of the spring portion.

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