JP5348745B2 - Protective cap - Google Patents

Description

  The present invention provides a fuse connection structure in which a terminal plate portion located on the upper surface wall of an L-shaped fuse unit straddling a ridge line portion between an upper surface wall and a side wall of a battery is electrically connected to a battery post via a battery terminal. The present invention relates to a protective cap made of an insulating resin to be attached to a crown.

  FIG. 5 shows a fuse connection structure 101 that enables a wire connection to a battery via a fuse without going through a fuse box installed away from the battery, and the fuse connection structure 101 is mounted with a crown. A conventional example of the protective cap 103 made of an insulating resin is shown.

  In the fuse connection structure 101 shown here, an L-shaped fuse unit 107 straddling the ridge 105c between the upper wall 105a and the side wall 105b of the battery 105 is electrically connected to the battery post 105d of the battery 105 via the battery terminal 109. Connected.

  The fuse unit 107 has a fuse element 111 accommodated in a resin fuse housing 113.

  The fuse element 111 includes a first terminal plate portion 111a that is conductively connected to the battery terminal 109, and a second terminal plate portion 111b that is conductively connected to an alternator or other output-side electrical circuit. Further, although not shown, a fusible link between the first terminal plate portion 111a and the second terminal plate portion 111b is conductively connected between the terminal plate portions so as to be fused by an overcurrent. (Soluble body) is provided.

  The first terminal plate portion 111a has a bolt insertion hole 113 through which a stud bolt 109a planted at the tip of the battery terminal 109 is inserted, and is electrically connected to the battery terminal 109 by fastening to the stud bolt 109a. .

  In the battery terminal 109, a stud bolt 109a on the distal end side is fastened to the first terminal plate portion 111a, and a base end portion 109b of the battery terminal 109 fitted to the battery post 105d is fastened to the battery post 105d by a screw 115. Thus, the first terminal plate portion 111a is conductively connected to the battery post 105d.

  The protective cap 103 mainly includes the first cap portion 121 that covers the battery terminal 109 and the battery post 105d located on the upper surface wall 105a, and is connected to the first cap portion 121 and mainly includes the first cap portion 121. And a second cap portion 123 that covers an upper surface and an outer surface of the fuse unit 107.

  In order to prevent the protective cap 103 from inadvertently dropping from the fuse connection structure 101, the protective cap 103 requires an engaging means for coupling to the fuse connection structure 101.

  In the conventional protective cap 103, as a coupling means for coupling to the fuse connection structure 101, the inner surface of both side walls 123 a of the second cap portion 123 is engaged with the engaging portions 131 on both side surfaces of the fuse unit 107, so that the fuse is connected. Various types of units having a unit engaging portion (not shown) for coupling with the unit 107 have been proposed (see, for example, Patent Documents 1 and 2).

JP 2002-270082 A JP 2006-269186 A

  By the way, when a deformed vehicle body frame collides with the fuse unit 107 to which the protective cap 103 is mounted in a crown due to a vehicle collision accident or the like, if a predetermined breaking load is applied, as shown in FIG. There is a high possibility that the unit 107 will break near the position corresponding to the ridgeline portion 105c of the battery 105 (the position indicated by the line AA in the drawing).

  The broken portion of the fuse unit 107 is detached from the battery 105. However, since the conventional protective cap 103 is coupled to the engaging portion 131 on the side surface of the fuse unit 107, the protective cap 103 is attached together with the fuse unit 107 that is removed. Drops from the battery 105 side, and the battery post 105d and the battery terminal 109 are exposed.

  As a result, the deformed vehicle body frame may come into contact with the exposed battery post 105d or the battery terminal 109, which may cause a short circuit.

  The object of the present invention is to solve the above problems, and even when the fuse unit breaks and falls off the battery due to a vehicle collision accident or the like, the battery post and the battery terminal are maintained in the protective state covered with the protective cap. An object of the present invention is to provide a protective cap capable of preventing the occurrence of a short circuit.

The above-described object of the present invention is achieved by the following configuration.
(1) A fuse connection structure in which a terminal plate portion located on the upper surface wall of the L-shaped fuse unit straddling the ridge line portion between the upper surface wall and the side wall of the battery is electrically connected to the battery post via the battery terminal. A protective cap made of insulating resin to be mounted on the crown,
A first cap portion that mainly covers the battery terminal and the battery post located on the upper surface wall, and a first cap portion that is connected to the first cap portion and mainly covers the upper surface and the outer surface of the fuse unit. 2 cap parts,
As an engagement means that achieves connection with the fuse connection structure, a terminal engagement portion that engages with the battery terminal is provided in the first cap portion, and
A wall that covers the outer periphery of the fuse unit so that the broken fuse unit piece can be discharged when a predetermined or more breaking load that causes breakage of the fuse unit is applied to the second cap portion. An emergency opening wall is provided to open the section ,
The protective cap characterized in that the first cap part and the second cap part are engaged with the battery terminal by the terminal engaging part even when the broken fuse unit piece is released. .

  (2) The emergency open wall portion is connected to the adjacent wall portion via an easily breakable portion having low mechanical strength, and when a predetermined or greater breaking load is applied that causes the internal fuse unit to break. The protective cap according to (1), wherein when the easily breakable portion is broken, the broken fuse unit piece is releasably opened.

(3) The protective cap according to the above (2), wherein the easily breakable portion is a thin portion in which the wall portion is thinned by forming a notch.

  (4) The protective cap according to (3), wherein the notch is formed on a back surface of the wall portion.

  According to the configuration of (1) above, when a deformed body frame collides with a fuse unit in which a protective cap is mounted, due to a vehicle collision accident or the like, a predetermined or greater breaking load acts, and the fuse When the unit breaks, the emergency open wall of the second cap that covers the fuse unit opens, allowing the broken fuse unit piece to be discharged, and from the broken fuse unit piece battery. Is allowed to drop.

  In addition, the protective cap itself, which was put on the fuse connection structure, is connected to the battery terminal by the terminal connecting part provided in the first cap part covering the battery terminal and the battery post, so that the broken fuse Keeping the battery terminal and battery post covered is protected without falling off the battery with the unit.

  Therefore, there is no inconvenience that the deformed body frame directly contacts the battery terminal or the battery post, and the occurrence of a short circuit can be prevented.

  According to the configuration of the above (2), the emergency open wall portion is connected to the adjacent wall portion via the easily breakable portion that breaks when a predetermined or greater breaking load is applied, and is used for the opening operation. Since special metal parts are not required, they can be manufactured by the same resin molding method as before, and there will be no increase in parts due to the provision of emergency open walls, and it will not be difficult to manufacture protective caps. .

  According to the configuration of (3) above, by adjusting the shape of the notch and the depth of the notch, the rupture load and rupture characteristics of the easily ruptured portion can be arbitrarily changed. It becomes easy to design an easily breakable portion that breaks quickly.

  According to the configuration of (4) above, by providing the notch on the back side of the wall surface, the appearance is not affected, and the equipment of the easily breakable portion does not deteriorate the appearance (designability) of the protective cap. .

  According to the protective cap of the present invention, when a deformed vehicle body frame collides with a fuse unit to which the protective cap is mounted in a collision caused by a vehicle collision or the like, a predetermined breaking load or more is applied to the fuse unit. When the breakage occurs, the emergency opening wall of the second cap part that covered the fuse unit is opened, and the broken fuse unit can be discharged, and the broken fuse unit can be removed from the battery. Permissible.

  On the other hand, the protective cap itself, which was put on the fuse connection structure, is connected to the battery terminal by the terminal connecting portion provided in the first cap portion covering the battery terminal and the battery post, so that the broken fuse Keeping the battery terminal and battery post covered is protected without falling off the battery with the unit.

  Therefore, there is no inconvenience that the deformed body frame directly contacts the battery terminal or the battery post, and the occurrence of a short circuit can be prevented.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a protective cap according to the present invention will be described in detail with reference to the drawings.

  1 is a perspective view of an embodiment of a protective cap according to the present invention, FIG. 2 is a perspective view of an emergency opening wall portion of the protective cap shown in FIG. 1, and FIG. 3 is a perspective view of FIG. FIG. 4 is a perspective view showing a state in which a broken fuse unit is discharged from an opening of the protective cap in a battery equipped with a protective cap. FIG. 4 shows a fuse connection structure remaining in the protective cap after the broken fuse unit is removed. It is a perspective view which shows the state of.

  The fuse connection structure in which the protective cap 1 of this embodiment is mounted with a crown is the fuse connection structure 101 shown in FIG. 5, and the description of the fuse connection structure 101 is omitted. In addition, about each part of the fuse connection structure 101 used in description of the following embodiment, and each part of a battery, the number same as the number of each part shown in FIG. 5 is used, and the detail about each part is shown. The detailed explanation is omitted.

  The protective cap 1 according to the present embodiment is mainly provided with a first cap portion 3 that covers the battery terminal 109 and the battery post 105 d that are mainly located on the upper surface wall 105 a of the battery 105, and is connected to the first cap portion 3. Thus, the second cap portion 5 mainly covering the upper surface and the outer surface of the fuse unit 107 is integrally molded with an insulating resin.

  In the case of the protective cap 1 according to the present embodiment, although not shown, the engaging means for coupling with the fuse connection structure 101 is engaged with the battery terminal 109 on the inner surface of the side wall of the first cap portion 3. A terminal engaging portion is provided. Further, the second cap portion 5 is not provided with an engaging means that engages with the locking portion 131 on the side surface of the fuse unit 107, and the second cap portion 5 only covers the fuse unit 107.

  The second cap portion 5 releases a fractured fuse unit piece 107A (see FIG. 3) when a predetermined or greater breaking load that causes the inner fuse unit 107 to break due to a vehicle collision accident or the like acts. An emergency opening wall 7 that opens the wall that covers the outer periphery of the fuse unit 107 is provided.

  The emergency open wall portion 7 of the present embodiment includes a flat side wall 7a covering the outer side surface 107a (see FIG. 6) of the fuse unit 107 substantially parallel to the side wall 105b of the battery 105, and the side wall 7a. And a cable crown portion 7b formed to bulge.

  The cable crown portion 7 b is a portion that covers the periphery of the terminal portion 143 (see FIG. 6) of the cable 141 with a terminal extending to the outer surface 107 a of the fuse unit 107.

  Easily breakable portions 9 having low mechanical strength are provided on both side ends of the emergency opening wall portion 7. The emergency open wall portion 7 is connected to the adjacent wall portions 11 and 13 via the easily breakable portions 9 on both side ends.

  In the case of the present embodiment, the easily breakable portion 9 is a ridge line portion where both side edges of the side wall 7a of the second cap portion 5 and the adjacent wall portions 11 and 13 intersect.

  The easily breakable portion 9 is set to be lower in strength than the surrounding wall portion so as to be broken when a predetermined breaking load or more that causes the internal fuse unit 107 to break due to a collision with the body frame or the like is applied. By doing so, as shown in FIGS. 2 and 3, the fractured fuse unit piece 107A is releasably opened.

  The easily breakable portion 9 of the present embodiment is formed by forming, for example, a V-groove notch on the back side of the ridge line portion where the emergency open wall portion 7 and the adjacent wall portions 11 and 13 intersect, It is a thin-walled part made thin.

  However, the specific shape of the notch formed in the easily breakable portion 9 is not limited to the V-groove shape. The shape and depth of the notch may be adjusted as appropriate according to the assumed breaking load.

  In the protective cap 1 described above, when a deformed body frame collides with the fuse unit 107 to which the protective cap 1 is mounted in a crown due to a vehicle collision accident or the like, a predetermined or greater breaking load acts, When the fuse unit 107 breaks, the emergency opening wall portion 7 of the second cap portion 5 covering the fuse unit 107 is opened, and the broken fuse unit piece 107A can be discharged and broken. The disconnection of the fuse unit piece 107A from the battery 105 is allowed.

  Further, the protective cap 1 itself that has been mounted on the fuse connection structure 101 is coupled to the battery terminal 109 by the terminal coupling portion provided in the first cap portion 3 covering the battery terminal 109 and the battery post 105d. Therefore, the battery unit 109 and the battery post 105d are kept in a protected state without falling off from the battery 105 together with the broken fuse unit piece 107A.

  Therefore, there is no inconvenience that the deformed body frame directly contacts the battery terminal 109 or the battery post 105d, and the occurrence of a short circuit accident can be prevented.

  Furthermore, in the case of the protective cap 1 of the present embodiment, the emergency opening wall portion 7 is connected to the adjacent wall portions 11 and 13 via the easily breakable portion 9 that breaks when a predetermined or more breaking load is applied. Because it does not require special metal parts, etc. for opening operation, it can be manufactured by the same resin molding method as before. 1 is not difficult to manufacture.

  Further, in the case of the protective cap 1 of the present embodiment, the easily breakable portion 9 is a thin portion in which the wall portion is thinned by forming a notch, so that by adjusting the shape of the notch and the depth of the notch The breaking load and breaking characteristics of the easily breakable portion 9 can be arbitrarily changed, and the design of the easily breakable portion 9 that breaks quickly when a predetermined breaking load or more acts is facilitated.

  If the notch is provided on the back side of the wall as in the above embodiment, the appearance is not affected, and the equipment of the easily breakable portion 9 does not deteriorate the appearance (designability) of the protective cap 1. .

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

1 is a perspective view of an embodiment of a protective cap according to the present invention. It is a perspective view in the state where the emergency opening wall part of the protective cap shown in FIG. 1 was opened. FIG. 2 is a perspective view showing a state where a broken fuse unit is discharged from an opening portion of the protective cap in the battery with the protective cap shown in FIG. 1 attached. It is a perspective view which shows the state of the fuse connection structure which remains in the protective cap after the fracture | ruptured fuse unit falls off. It is a perspective view of a fuse connection structure and a conventional protective cap to be mounted on the fuse connection structure. It is a perspective view which shows the position which a fuse unit fractures | ruptures by the collision etc. of a vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective cap 3 1st cap part 5 2nd cap part 7 Emergency open wall part 7a Side wall 7b Cable crown part 9 Easily breakable part 11,13 Adjacent wall part 101 Fuse connection structure 105 Battery 105a Top wall 105b Side wall 105c Ridge part 107 Fuse unit 107a Outer side surface 107A Broken fuse unit piece 109 Battery terminal

Claims (4)

The terminal plate part located on the upper wall of the L-shaped fuse unit straddling the ridge line between the upper wall and side wall of the battery is attached to the fuse connection structure in which the battery plate is electrically connected to the battery post via the battery terminal. A protective cap made of insulating resin,
A first cap portion that mainly covers the battery terminal and the battery post located on the upper surface wall, and a first cap portion that is connected to the first cap portion and mainly covers the upper surface and the outer surface of the fuse unit. 2 cap parts,
As an engagement means that achieves connection with the fuse connection structure, a terminal engagement portion that engages with the battery terminal is provided in the first cap portion, and
A wall that covers the outer periphery of the fuse unit so that the broken fuse unit piece can be discharged when a predetermined or more breaking load that causes breakage of the fuse unit is applied to the second cap portion. An emergency opening wall is provided to open the section ,
The protective cap characterized in that the first cap part and the second cap part are engaged with the battery terminal by the terminal engaging part even when the broken fuse unit piece is released. .   The emergency open wall portion is connected to the adjacent wall portion via an easily breakable portion having low mechanical strength, and when the breakage load exceeding a predetermined level that causes the internal fuse unit to break is applied, The protective cap according to claim 1, wherein the broken fuse unit piece is releasably opened when the broken portion is broken. The protective cap according to claim 2, wherein the easily breakable portion is a thin portion in which a wall portion is thinned by forming a notch.   The protective cap according to claim 3, wherein the notch is formed on a back surface of the wall portion.

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