JP2011228027A - Intermittent mechanism of dark current fuse - Google Patents

Abstract

A dark current fuse interrupting mechanism capable of interrupting a dark current fuse without requiring a dedicated part such as a fuse holder.
An arrangement of a first contact 15 and a second contact 16 in a fuse block 12 is made different. When the pair of male tab terminals 48 of the dark current fuse 11 come into contact with the first contact 15 and the second contact 16, the electrical component circuit is electrically turned on. Since the first contact 15 and the second contact 16 are arranged differently, the electrical component circuit is electrically turned off by releasing one of the contacts. At this time, one of the male tab terminals 48 of the dark current fuse 11 is supported or held by either the first contact 15 or the second contact 16.
[Selection] Figure 5

Description

  The present invention relates to a mechanism for intermittently connecting a dark current fuse for an electrical component circuit directly connected to a battery.

  In FIG. 8, the electrical junction box 1 is provided with a large number of fuse blocks 2. A general fuse 3 is connected to each fuse block 2. The fuse block 4 that protrudes one higher among the many fuse blocks 2 is provided for interrupting the dark current fuse 5. The fuse block 4 is formed in a higher shape so as to be distinguished from the fuse block 2 for the general fuse 3. In the case of an automobile, the dark current fuse 5 is used when a circuit of a dark current component such as a watch, which is directly connected to a battery, is electrically turned off after being manufactured and delivered to a user. When the dark current fuse 5 is taken out at an automobile manufacturing factory and delivered to the user, it is inserted into the fuse block 4 at the dealer.

  By the way, in the above structure, storage of the dark current fuse 5 after extraction is difficult and there is a concern that the dark current fuse 5 may be lost. Proposals for use have been made (not shown). The fuse holder has a mechanism for sliding itself and the dark current fuse with respect to the fuse block. The fuse holder is formed slightly larger than the fuse block. It is also formed in a shape that fits outside the fuse block.

Japanese Patent Laid-Open No. 5-159693

  Since the fuse holder is shaped to fit outside the fuse block, it is formed one size larger than the fuse block for the dark current fuse, so that a space for the fuse holder is secured around the fuse block. Have the problem of having to do. In addition, there is a problem that the material cost for the space is increased. In addition, since the fuse holder is a dedicated part, there is a problem that the part management before the assembly is difficult as well as the part cost increases. Moreover, since it is a dedicated part, it has the problem that the design man-hour increases and it has an influence when commercializing an electrical junction box with a short delivery time.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a dark current fuse interrupting mechanism that enables the dark current fuse to be interrupted without requiring a dedicated component such as a fuse holder. To do.

  The dark current fuse interrupting mechanism of the present invention according to claim 1, which has been made to solve the above-mentioned problems, includes a first contact and a second contact of a fuse block for a pair of male tab terminals of a dark current fuse. The dark current fuses are arranged so as to be stepped in the attaching / detaching direction of the dark current fuses.

  According to the present invention having such a feature, when the dark current fuse is inserted toward the inside of the fuse block, the pair of male tab terminals of the dark current fuse contacts the first contact and the second contact, As a result, the electrical component circuit is electrically turned on. According to the present invention, when the dark current fuse is pulled out from a state where the pair of male tab terminals are in contact with the first contact and the second contact, either the first contact or the second contact Is released, whereby the electrical component circuit is electrically turned off. At this time, one of the male tab terminals is supported or held by either the first contact or the second contact.

  A dark current fuse interrupting mechanism according to a second aspect of the present invention is the dark current fuse interrupting mechanism according to the first aspect of the present invention, wherein the dark current fuse in the width direction of the dark current fuse or the outside of the fuse attaching / detaching opening of the fuse block is provided. A pair of walls in the thickness direction and protruding in the attaching / detaching direction are integrally provided.

  According to the present invention having such a feature, the dark current fuse moves along a pair of walls when the dark current fuse is inserted into the fuse attaching / detaching opening or when the dark current fuse is pulled out and removed. To do. In the present invention, the pair of walls serves as a mark for the dark current fuse.

  According to a third aspect of the present invention, there is provided the dark current fuse interrupting mechanism according to the second aspect of the present invention, wherein the dark current fuse interrupting mechanism according to the second aspect is provided with a projection for preventing the dark current fuse from falling off on the inner surface of the wall. Features.

  According to the present invention having such a feature, the dark current fuse is brought into contact with the protrusion and prevented from falling off, for example, when the dark current fuse is removed.

  According to the first aspect of the present invention, the arrangement of the first contact and the second contact in the fuse block is made different, so that it is possible to darken without requiring a fuse holder as a dedicated component as in the prior art. There is an effect that the current fuse can be interrupted. In addition, according to the present invention, it is not necessary to secure a large space around the fuse block, and the dark current fuse can be intermittently connected with a minimum material cost. Furthermore, since no special parts are required, it is possible to suppress the increase in design man-hours and to achieve commercialization with a short delivery time.

  According to the second aspect of the present invention, the dark current fuse can be reliably and accurately interrupted. According to the third aspect of the present invention, there is an effect that it is possible to make the mechanism difficult to drop off.

It is a figure which shows the intermittent mechanism of the dark current fuse of this invention, and is a figure which shows a series of flow of the time of isolation | separation-> insertion time-> pulling-out-> returning. It is a perspective view of a fuse block. It is a perspective view (a section is included) of a fuse block. It is a perspective view (a section is included) at the time of dark current fuse separation. It is a front view (a section is included) at the time of dark current fuse separation. It is a perspective view (a section is included) at the time of dark current fuse insertion. It is a front view (a cross section is included) at the time of dark current fuse insertion. It is a perspective view (a section is included) of the electrical junction box of a prior art example.

  The arrangement of the first contact and the second contact in the fuse block is made different. When the pair of male tab terminals of the dark current fuse contacts the first contact and the second contact, the electrical component circuit is electrically turned on. Since the first contactor and the second contactor are arranged differently, the electrical component circuit is electrically turned off by releasing one of the contacts. At this time, one of the male tab terminals of the dark current fuse is supported or held by either one of the first contact and the second contact.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a diagram showing an intermittent mechanism of a dark current fuse according to the present invention. 2 is a perspective view of the fuse block, FIG. 3 is a perspective view of the fuse block including the cross section, FIGS. 4 and 6 are perspective views of the dark current fuse including the cross section when removed and inserted, and FIGS. It is a front view at the time of dark current fuse removal including a cross section and insertion.

  In FIG. 1, reference numeral 11 indicates a known dark current fuse. Reference numeral 12 denotes a fuse block for the dark current fuse 11. The fuse block 12 is provided in an electrical connection box (not shown) (for example, a relay box) mounted on a vehicle such as an automobile. The arrows in the figure indicate the top, bottom, left, and right directions (the directions of the arrows are examples).

  In FIG. 1A, the dark current fuse 11 is in a state in which an electrical component circuit (not shown) is electrically turned off due to a characteristic part in the fuse block 12. That is, the dark current fuse 11 is in a state of being detached from the electrical connection portion of the fuse block 12.

  In FIG. 1B, the dark current fuse 11 is inserted into the fuse block 12. Specifically, it is pushed downward from the state of FIG. 1A with a finger and is thereby inserted into the fuse block 12. That is, the dark current fuse 11 is in contact with the electrical connection portion and is in a state of electrically turning on an electrical component circuit (not shown).

  In FIG. 1C, the dark current fuse 11 is pulled out by the known puller 13 from the state of FIG. 1B, and is changed to the detached state of FIG. 1A. The dark current fuse 11 is not easily dropped from the fuse block 12 even if it is pulled out by the puller 13.

  2 and 3, the fuse block 12 includes a cavity 14 made of a synthetic resin having insulating properties, and a first contact 15 and a second contact 16 provided in the cavity 14. . The fuse block 12 has a structure in which the first contact 15 and the second contact 16 are characteristic with respect to a general fuse block (not shown) for a fuse, and a part of the cavity 14 is characteristic. (Mechanism) is different.

  First, a general and common structure in the cavity 14 will be described, and then the structure of the first contact 15 and the second contact 16 and the characteristic arrangement will be described. Finally, the characteristic structure of the cavity 14 will be described.

  The main body 17 of the cavity 14 has a front wall 18, a rear wall 19, a left wall 20, and a right wall 21, a fuse attachment / detachment opening 22 on the upper surface, and a first contactor opening 23 and a second contactor on the lower surface. It is formed in a substantially box shape having an opening 24 for use. The main body 17 has a fuse accommodating portion 25 inside so as to be continuous with the fuse attaching / detaching opening 22. Moreover, the main body 17 has the 1st contactor accommodating part 26 inside so that the opening part 23 for 1st contactors may be followed. Further, the main body 17 has a second contact accommodating portion 27 inside so as to be continuous with the second contact opening 24. The fuse accommodating portion 25, the first contact accommodating portion 26, and the second contact accommodating portion 27 are formed so that these spaces communicate with each other.

  The fuse attaching / detaching opening 22 has a stopper 28 and a slit 29 at the time of inserting the fuse at the left and right positions on the outer edge. The 1st contactor accommodating part 26 has the lance 30 for latching the 1st contactor 15 (refer FIG. 4). The second contact accommodating portion 27 has a slit 31 for holding the second contact 16. The slit 31 is formed so as to cut out the front wall 18 and the rear wall 19 straight in the vertical direction. The first contactor accommodating part 26 and the second contactor accommodating part 27 are arranged and formed so as to be stepped for the arrangement (described later) of the first contactor 15 and the second contactor 16.

  4 to 7, the first contact 15 is a known terminal and is provided at the end of the electric wire 32. The first contact 15 is formed by pressing a conductive metal thin plate. The first contact 15 has a wire connecting portion 33 and an electrical contact portion 34. A pair of elastic contact pieces 35 are formed in the electrical contact portion 34. The first contact 15 is configured such that the lance 30 is hooked on the box-shaped portion 36 in the electrical contact portion 34.

  The second contact 16 is a known contact and is provided so as to be continuous with a bus bar body (not shown). The second contact 16 is formed by pressing a conductive thick metal plate. The second contact 16 has a bus bar portion 37 continuous with the bus bar main body and a tuning fork terminal portion 38 continuous with the bus bar portion 37. The bus bar portion 37 is inserted and held in the slit 31 of the second contact accommodating portion 27. The tuning fork terminal portion 38 is accommodated and disposed at a position below the pair of elastic contact pieces 35 in the first contact 15.

  4 and 5, when the first contact 15 is accommodated in the first contact accommodating portion 26 and the second contact 16 is accommodated in the second contact accommodating portion 27, the first contact 15 is second. It is arranged above the contact 16. That is, the arrangement of the first contact 15 and the second contact 16 is different in the vertical direction (matching the direction in which the dark current fuse 11 is attached / detached). The contact positions of the first contact 15 and the second contact 16 with the male tab terminal 48 described later of the dark current fuse 11 are also different (see FIGS. 6 and 7).

  2 to 7, the characteristic structure of the fuse block 12 is a portion integrally provided at the left and right positions of the outer edge portion of the fuse attaching / detaching opening 22, specifically, the width of the dark current fuse 11. The wall 39 which becomes a pair in the direction and protrudes upward corresponds. The pair of walls 39 are arranged and formed so as to be parallel to the left wall 20 and the right wall 21 and the inner surfaces 40 face each other. Rib-shaped guides 41 are coupled to both sides of the pair of walls 39. The wall 39 and the guide 41 are formed in a substantially bracket shape when viewed in plan. The wall 39 and the guide 41 are formed in a higher shape so as to be distinguished from a general fuse block (not shown) for a fuse.

  A protrusion 42 is provided on the inner surface 40 of the wall 39. The protrusion 42 is formed to protrude in a direction orthogonal to the inner surface 40. The protrusion 42 is disposed on the upper end side of the wall 39 to prevent the dark current fuse 11 from falling off. The protrusion 42 has a tapered surface 44 for guiding the dark current fuse 11 between the pair of walls 39 and a locking surface 45 for hooking and locking the upper surface of the head 46 described later. The locking surface 45 is formed to have a sufficient area to prevent the dark current fuse 11 from falling off.

  The guide 41 is provided so as to be continuous with both side portions of the wall 39 as described above. The pair of guides 41 is set so that this interval matches the thickness of the dark current fuse 11 (the length in the front-rear direction of the head 46 described later). The guide 41 is arranged and formed in such a size that it does not interfere with the use of the puller 13 (see FIG. 1).

  4 to 7, the dark current fuse 11 has a known low profile. The dark current fuse 11 has a head portion 46, a body portion 47, and a pair of male tab terminals 48.

  In the above configuration and structure, when the dark current fuse 11 is mounted between the pair of walls 39 so as to get over the protrusion 42, the upper half of the dark current fuse 11 has a fuse mounting opening as shown in FIG. It will be in the state which comes out of 22. At this time, as shown in FIGS. 4 and 5, the dark current fuse 11 is in a state in which one male tab terminal 48 is supported by being placed on the distal end portion 43 of the pair of elastic contact pieces 35 of the first contact 15. Become. Further, the dark current fuse 11 is in a state where the other male tab terminal 48 is detached from the second contact 16 (non-contact state, and an electrical component circuit not shown is turned off (dark current cut)). In addition, the dark current fuse 11 is prevented from falling off the fuse block 12 due to the presence of the protrusion 42 (the dark current fuse 11 has one male tab terminal 48 at the tip of the pair of elastic contact pieces 35. 43 and does not rise more than necessary due to the presence of the protrusions 42).

  When the dark current fuse 11 is inserted into the fuse block 12 so that the head 46 of the dark current fuse 11 is pushed straight down, the dark current fuse 11 is connected to the pair of male tab terminals 48 as shown in FIGS. Completely contacts the first contact 15 and the second contact 16 (first one male tab terminal 48 is pushed into the first contact 15 and then the other male tab terminal 48 is moved to the second contact 16. To make full contact) As a result, an electrical component circuit (not shown) is electrically turned on. The dark current fuse 11 is smoothly guided by the pair of walls 39 and guides 41 when the dark current fuse 11 is inserted into the fuse block 12.

  As described above with reference to FIGS. 1 to 7, according to the present invention, the arrangement of the first contact 15 and the second contact 16 inside the fuse block 12 is different from the conventional one. The dark current fuse 11 can be interrupted without requiring a fuse holder as a dedicated component. Further, according to the present invention, it is not necessary to secure a large space around the fuse block 12, and the dark current fuse 11 can be intermittently connected with a minimum material cost. Furthermore, since no dedicated parts as in the prior art are required, it is possible to suppress the increase in design man-hours and to achieve commercialization with a short delivery time.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

  In the above description, the wall 39 is provided at the left and right positions of the outer edge portion of the fuse attaching / detaching opening 22, but the wall 39 is not limited to this and may be provided at the front and rear positions. Moreover, although the 1st contactor 15 was arrange | positioned upwards rather than the 2nd contactor 16, not only this but the 2nd contactor 16 may be arrange | positioned upwards. Shall.

DESCRIPTION OF SYMBOLS 11 ... Dark current fuse 12 ... Fuse block 13 ... Puller 14 ... Cavity 15 ... First contact 16 ... Second contact 17 ... Main body 18 ... Front wall 19 ... Rear wall 20 ... Left wall 21 ... Right wall 22 ... Fuse removal Opening 23 ... Opening for first contact 24 ... Opening for second contact 25 ... Fuse housing 26 ... First contact housing 27 ... Second contact housing 28 ... Fuse insertion stopper 29 ... Slit DESCRIPTION OF SYMBOLS 30 ... Lance 31 ... Slit 32 ... Electric wire 33 ... Electric wire connection part 34 ... Electric contact part 35 ... Elastic contact piece 36 ... Box-shaped part 37 ... Bus-bar part 38 ... Tuning fork terminal part 39 ... Wall 40 ... Inner surface 41 ... Guide 42 ... Protrusion 43 ... Tip 44 ... Tapered surface 45 ... Locking surface 46 ... Head 47 ... Body 48 ... Male tab terminal

Claims (3)

A dark current fuse interrupting mechanism, wherein the first contact and the second contact of the fuse block are arranged in a step difference in the direction of attaching and detaching the dark current fuse with respect to the pair of male tab terminals of the dark current fuse. . In the dark current fuse interrupting mechanism according to claim 1,
A dark current fuse interrupting mechanism characterized in that a pair of walls in the width direction or thickness direction of the dark current fuse and protruding in the attachment / detachment direction are integrally provided outside the fuse attachment / detachment opening of the fuse block. In the dark current fuse interrupting mechanism according to claim 2,
A dark current fuse interrupting mechanism, wherein a protrusion for preventing the dark current fuse from dropping is provided on the inner surface of the wall.

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