JP5449880B2 - Block fitting type electric connection box - Google Patents

Description

  The present invention relates to a block fitting type electric connection box in which a fuse block or the like is inserted into a frame and locked without backlash.

  FIG. 9 shows an embodiment of a conventional block fitting type electric junction box.

  This block fitting type electric junction box 51 is inserted from below into a synthetic resin frame 52, a plurality of synthetic resin block bodies 53 to be inserted and fitted into the frame 52 from the bottom up. The terminal is equipped with a terminal with an attached electric wire (not shown), an electrical component (not shown) such as a fuse or a relay attached to the upper portion of the block main body 53 and connected to the terminal, a connector, and the like. Each block body 53 and fuses, relays, etc. constitute each block (fuse block 53, relay block, etc.).

  The frame 52 is formed in a rectangular shape and includes front and rear outer walls 54 and 55, and a plurality of vertical partition walls 56 in the XY directions intersecting the inner surfaces of the outer walls 54 and 55. A block locking projection 8 is provided on the inner surfaces of the outer walls 54 and 55, and the projection 8 has a downward inclined surface 8a and an upward substantially horizontal locking surface 8b. A flexible arm 9 is provided on the outer surface of the block body 53, and the projection 9a of the arm 9 has an upward inclined surface 9b and a downward substantially horizontal locking surface 9c.

  At the same time that the block body 53 is fitted into the frame 52 upward, the arm 9 bends and gets over the protrusion 8, and the protrusion 9 a of the arm 9 engages with the protrusion 8 of the frame 52. Be blocked. For example, the upper surface 57 of the block body 53 is prevented from coming into contact with the lower surface of the upper wall 58 such as a flange of the frame 52.

  On the upper part of the frame 52, a synthetic resin fuse puller 34 for removing a small blade-type fuse inserted into the fuse block 53 for maintenance or the like is mounted in a frame integrated holder (fuse puller mounting portion) 59. ing.

  As similar to the block fitting type electric junction box 51, for example, in Patent Document 1, a plurality of blocks are inserted and fitted upward in a frame, and are locked by the projection of the frame and the projection of the block. In the patent document 2, an electronic control unit is fitted to the junction box body, and the projections of the arms of the junction box body are electronically controlled. It is described to engage and lock in the frame piece of the unit (not shown).

Japanese Patent Laying-Open No. 2007-28806 (FIG. 8) Japanese Patent Laying-Open No. 2008-172891 (FIG. 9)

  However, in the conventional block fitting type electric junction box 51, as shown in the enlarged view of FIG. 9, the projection 9a of the arm (lock portion) 9 after the engagement and the projection (lock portion) 8 on the frame 52 side are provided. Since a slight gap S for the overstroke is provided between them (the projection 9a of the arm 9 is not overstroked above the projection 8 of the frame 52 in consideration of a resin molding error or the like, the relationship between the projections 8 and 9a Since the stop surfaces cannot be engaged with each other), there is a concern that the block 53 may cause vertical play corresponding to the gap S with respect to the frame 52.

  Further, as shown in FIG. 10, when the block 53 is inserted upward into the frame 52 from the lower side, for example, when the pushing force is insufficient, the block 53 is incompletely fitted to the frame 52, and the arm 9 becomes the projection 8. There is a concern that the block 53 may become unengaged and the block 53 may come out downward.

  In view of the above-described points, the present invention can prevent backlash of the block with respect to the frame due to the gap between the lock portions of the frame and the block, and in addition, detects incomplete fitting of the block with respect to the frame. An object of the present invention is to provide a block fitting type electric junction box which can be used.

To achieve the above object, a block fitting type electric junction box according to claim 1 of the present invention is a block fitting type electric junction box in which a block is inserted into a frame and locked by a mutual locking portion. A lock member is provided on the block, and a locked member that engages the lock member without a gap in the gap direction between the lock portions is provided on the block. The lock member is connected to the spring portion and the shaft connected to the spring portion. And a protrusion provided on the shaft, and the member to be locked is a flexible arm that engages with the protrusion .

  With the above configuration, even if the block generates a gap between the lock portions with respect to the frame, the lock member on the frame side engages with the locked member on the block side without any gap, separately from the lock portion, Blocking of the block is prevented. Further, when the insertion of the block into the frame is incomplete, the incomplete fitting of the block is detected because the lock member cannot be engaged with the locked member.

Also , while pressing the shaft part and compressing the spring part, the arm is bent outward by the protrusion of the shaft part, and simultaneously with the restoration of the arm, the protrusion of the arm is engaged with the protrusion of the shaft part. By the restoring force of the spring portion, the shaft portion pulls the arm in the axial direction without a gap, so that the block having the arm and the frame having the shaft portion are in close contact with each other without any gap, thereby preventing backlash. In addition, when the insertion of the block into the frame is incomplete, the incomplete fitting of the block is detected because the projection of the shaft portion does not engage the arm.

Block fitting type electric connection box according to claim 2 is the block-fitting electrical connection box according to claim 1, wherein the spring portion, wherein said is of diaphragm-like to stretch in the gap direction.

  With the above configuration, the structure of the spring portion is made compact in the thickness (stretching / contracting) direction, and the spring portion is easily formed integrally with the frame at low cost by resin molding.

A block fitting type electric junction box according to claim 3 is the block fitting type electric junction box according to claim 1 or 3 , wherein a part of the shaft portion protrudes from the spring portion to constitute a pressing operation portion. And

  With the above configuration, when the operator presses the pressing operation portion at the tip of the shaft portion, the shaft portion is displaced in the compression direction integrally with the spring portion, and the pressing operation is performed when the protrusion of the shaft portion is engaged with the arm. By releasing the finger from the part, the spring part is restored integrally with the shaft part and the arm is pulled up.

A block fitting type electric junction box according to claim 4 is a block fitting type electric junction box in which a block is inserted into a frame and locked by a mutual lock portion. the locked member engaged in the gap direction of the gap without the lock member between the lock portions each other is provided, the lock member is a fuse puller that is inserted into the mounting portion provided in the frame, the locked member, Ri projections der to engage the claw of the fuse puller, the said mounting portion, wherein the partition walls pressed against the spring portion of the fuse puller is provided.

  With the above configuration, the fuse puller is pushed into the mounting part of the frame, and the nail of the fuse puller is engaged with the protrusion on the block side without any gap (the nail and the protrusion are The block and the frame are in close contact with each other without any gaps, and block play of the block is prevented. In addition, when the insertion of the block into the frame is incomplete, the incomplete fitting of the block is detected because the claw of the fuse puller does not engage with the protrusion.

Also, at the same time pushing the fuse puller into the mounting, the spring portion is compressed by being pushed by the partition wall, the fuse puller in its compression force is urged in the opposite direction or block in a direction to close contact with the frame push. In this state, the claw of the fuse puller engages with the protrusion on the block side, and the block is pulled up to the frame side by the restoring force of the spring portion to prevent rattling.

  According to the first aspect of the present invention, by engaging the lock member on the frame side with the locked member on the block side, it is possible to prevent backlash of the block with respect to the frame due to the gap between the lock portions of the frame and the block. Can do. Further, when the block is incompletely fitted to the frame, the lock member cannot be engaged with the member to be locked, so that the operator can detect the incomplete fitting of the block.

In addition , with the projection of the shaft part engaged with the arm without any gap, the restoring force of the spring part allows the arm side block to closely contact the frame on the shaft side with no gap, thereby reliably preventing the block of the block against the frame. can do. Further, when the block is incompletely fitted to the frame, the projection of the shaft portion cannot be engaged with the arm, so that the operator can detect the incomplete fitting of the block.

According to the second aspect of the present invention, the structure of the spring portion can be made compact in the thickness (stretching / contracting) direction, and the spring portion can be easily formed integrally with the frame at low cost by resin molding.

According to the invention described in claim 3 , the operator can easily and reliably perform the compression operation of the spring portion with good workability by pressing the operation portion at the tip of the shaft portion.

According to the invention of claim 4, in the state in which the nail of the fuse puller is engaged with the protrusion without a gap, the block on the protrusion side is brought into close contact with the frame on the fuse puller side with a pushing reaction force of the fuse puller, It is possible to reliably prevent the play of the block with respect to the frame. Further, when the block is incompletely fitted to the frame, the operator cannot detect the incomplete fitting of the block because the claw of the fuse puller cannot be engaged with the protrusion. Further, it is possible to perform block play prevention and incomplete fitting detection at low cost by using an existing fuse puller.

In addition , with the fuse puller claw engaged with the protrusion on the block side without any gap, the restoring force of the spring part of the fuse puller allows the block to be in close contact with the frame without any gap, thereby reliably preventing block play against the frame. be able to.

1 is a perspective view showing a first embodiment of a block fitting type electric junction box according to the present invention. (A) is a perspective view which shows the frame side part in the A section of FIG. 1, (b) is a perspective view which similarly shows a block side part. It is a top view which shows a block fitting type | mold electrical connection box. (A)-(c) is a longitudinal cross-sectional view which shows the engagement state of a frame side part and a block side part in order of operation. It is a perspective view (the inside of a frame is a B section enlarged view) showing a second embodiment of a block fitting type electric junction box concerning the present invention. (A) is a perspective view which shows the frame side part in the B section of FIG. 5, (b) is a perspective view which similarly shows a block side part. It is a longitudinal cross-sectional view which shows the normal fitting state of a frame and a block. It is a longitudinal cross-sectional view which shows the incomplete fitting state of a frame and a block. It is a longitudinal cross-sectional view (The inside of a frame is a principal part enlarged view) which shows one form of the conventional block fitting type electrical junction box. It is a principal part longitudinal cross-sectional view which shows the incomplete fitting state of the flame | frame and block of the conventional electrical junction box.

  1 to 4 show a first embodiment of a block fitting type electric junction box according to the present invention.

  As shown in FIGS. 1 to 2 (a) and 2 (b), this block fitting type electric junction box 1 includes a synthetic resin frame 2 and a synthetic resin block inserted and fitted into the frame 2 from the bottom up. In the structure including the main body 3, the frame 2 is provided with a diaphragm-like (membrane-plate-like) spring portion 4 that expands and contracts in the vertical direction, and a downward vertical shaft portion 5 is connected to the spring portion 4. A pair of right and left play prevention projections 6 is provided at the tip (lower end), and a pair of left and right flexible play prevention arms 7 for engaging the projections 6 of the shaft portion 5 are provided on the block body 3. 2 and the locking gaps between the lock parts 8 and 9 between the block body 3, that is, the locking projections (locking parts) 8 of the frame 2 similar to the prior art of FIG. 4 (a) to (c) even if there is an engagement gap S (see FIG. 9) with The projection 6 of the shaft portion 5 for preventing play and the arm 7 of the block body 3 are closely engaged with each other by the restoring force of the thread portion 4 so as to prevent the block body 3 from moving up and down relative to the frame 2. .

  As shown in FIGS. 1 and 3, the frame 2 has front and rear, left and right vertical outer walls 10 to 13 and vertical partition walls 14 in the X and Y directions intersecting the outer walls 10 to 13. A fuse block main body 3 as an example of the main body is inserted and fitted from the bottom to the top. The fuse block main body 3 has a mounting portion 15 for a small blade-type fuse (not shown), a mounting portion 16 for a large fusible link (not shown), and the like on the upper portion thereof. A fuse block (block) (substitute with reference numeral 3) is configured by mounting such electrical parts.

  On the inner surfaces of the outer walls 10 and 12 of the frame 2 that accommodates the fuse block main body 3 and the partition wall 14, locking projections 8 are provided at important points, and the projections 8 are directed upward with a downward inclined surface 8 a (FIG. 9). And a flexible arm 9 having locking projections 9a (FIG. 9) for locking the projections 8 is provided on the outer surface of the fuse block main body 3. The projection 9a of the arm 9 has an upward inclined surface 9b (FIG. 9) and a downward substantially horizontal locking surface 9c (FIG. 9). These locking structures are the same as in the conventional example of FIG.

  In FIG. 1, an electric wire (not shown) connected to a fuse or the like is led out below the fuse block 3 and accommodated in a lower cover (not shown) from the lower space of the frame 2 and led out from the cylinder portion 17 to the outside. The In FIG. 1, the front wall 10 of the frame 2 is cut away to show the inside.

  As shown in FIG. 3, the plate-like horizontal wall portion 18 is integrally formed on the inner surface of the front wall 10 of the frame 2, and the plate-like shape shown in FIGS. 1 and 2A orthogonal to the left and right sides of the horizontal wall portion 18. A vertical wall portion 19 is provided in a reverse concave shape in the vertical cross section, the spring portion 4 is integrally formed in the horizontal wall portion 18, and the wall portions 18 and 19 in the vertical cross section reverse concave shape are integrated in the frame 2. The fuse mounting part 20 is connected to each of the partition walls 14 ′ in the X and Y directions, and the partition wall 14 ′ is connected to the outer walls 11 and 12 integrally.

  As shown in FIG. 2 (a), the spring portion 4 is formed of a synthetic resin in a circular shape in plan view (shown broken from the center in the drawing), and is a thin and elastic longitudinal section following the thick portion 4a on the outer peripheral side. An annular valley 4b having a downward curved surface and a thin and elastic small circular mountain 4c following the upward curved shape in the longitudinal section in a free state from the valley 4b.

  The shaft portion 5 intersects (substantially orthogonally) and is integrally provided at the center of the curved ridge portion 4c, and the upper end portion of the shaft portion 5 slightly protrudes upward from the ridge portion 4c (press operation). Part) 5a, the most part of the shaft part 5 protrudes long downward from the peak part, and a pair of left and right protrusions 6 are integrally provided at the lower end of the shaft part 5, and the pair of protrusions 6 have a scouring shape. And a downward inclined surface 6a and an upward horizontal locking surface 6b.

  As shown in FIG. 4A, the locking surface 6 b of the protrusion 6 is positioned slightly above the lower ends 19 a of the vertical wall portions 19 on both sides of the upper horizontal wall portion 18 in the free state, and the inclined surface of the protrusion 6. 6a is positioned to project downward from the lower end 19a of the vertical wall portion 19. 2 and 4 (a), reference numerals 4d on the left and right sides of the crest 4c are die-cutting holes for projection resin molding. The shaft portion 5 is connected to the crest portion 4c at the front and rear portions excluding the left and right die-cutting holes 4d. The spring portion 4 has elasticity (restoring force) in both the upper and lower directions. The spring part 4, the shaft part 5, and the protrusion 6 constitute a lock member 21. In the specification, the front-rear and left-right directions are for convenience of explanation.

  In FIG. 1, the pair of left and right projections 6 of the shaft portion 5 are engaged with a pair of left and right arms 7 made of synthetic resin of the block body 3 (in a state shown in FIG. 4C). As shown in FIG. 2B, each arm 7 protrudes upward from a rectangular hole 23 in the horizontal upper wall 22 of the block body 3, and the base end (lower end) of each arm 7 has a horizontal short support portion 7a. The tip (upper end) of each arm 7 projects upward from the upper wall 22 and the projection 7b on the tip side of each arm 7 is located symmetrically inward. And an upwardly inclined surface 7c and a downwardly horizontal locking surface 7d. Each projection 7 protrudes above the upper wall 22, and each locking surface 7d is positioned slightly above the upper surface of the upper wall 22. doing.

  The arm 7 is composed of a vertical arm body 7e and a protrusion 7b protruding inward at the upper part of the arm body, and a gap between the inner surfaces 7e 'of each arm body 7e is between the protrusions 6 of the shaft portion 5 on the frame 2 side. The width between the protrusions 7 b of the arm 7 is smaller than the width of both protrusions 6 of the shaft portion 5. The arm 7 acts as a member to be locked against the lock member 21.

  At the right end of the upper wall 22 of the block body 3, a vertical wall portion 24 for guiding along the vertical right wall 19 of the inverted concave wall portions 18, 19 of the frame 2 is erected. A vertical wall portion 25 is suspended downward from both sides, and a space 26 surrounded by the upper wall 22 and the left and right wall portions 25 is formed on the lower side of the arm 7. As shown in FIG. 3 is located slightly lower than the upper ends of the other fuse mounting portions 15 and the like.

  A block main body 3 (more precisely, a block containing a terminal with a wire or the like) is inserted into the frame 2 from the bottom upward, and the locking arm 9 of the block main body 3 is moved over the protrusion 8 of the frame 2 and engaged. 9, a slight gap S corresponding to the overstroke is generated between the locking surface 9c at the lower end of the projection 9a of the arm 9 and the locking surface 8b at the upper end of the projection 8 of the frame 2 as shown in FIG. 4A, both projections 6 of the shaft portion 5 for rattling are positioned between the projections 7b of the pair of arms 7 for rattling, and the pair of arms 7 are pushed by both projections 6. It is in a state of bending outward (tilting outward with the lower end of the arm as a fulcrum).

  When the shaft portion 5 is pushed downward as indicated by an arrow C from the state of FIG. 4A, the spring portion 4 is bent downward as shown in FIG. 4B, and the valley portion of the spring portion 4 of FIG. 4b and crest 4c become one large-diameter downward curved portion 4e, and the shaft portion 5 is pushed down by the downward stroke of the spring portion 4 so that the projection 6 of the shaft portion 5 is the projection of the arm 7. 7b, the arm 7 is restored inwardly (vertically), and at the same time, between the locking surface 6b at the upper end of the projection 6 of the shaft portion 5 and the locking surface 7d at the lower end of the projection 7b of the arm 7. A gap L is formed in

  When the operator releases the downward pressing of the shaft portion 5 by the finger from the state of FIG. 4B (releases the hand from the upper protrusion 5a of the shaft portion 5), the spring portion 4 as shown in FIG. Is displaced upward by the restoring force, and the shaft portion 5 is pulled up integrally. As a result, the locking surface 6b at the upper end of the projection 6 of the shaft portion 5 abuts (elastically contacts) the locking surface 7d at the lower end of the projection 7b of the arm 7 of the block body 3 without any gap, and is further integrated with the arm 7. The block body 3 is pulled upward by the restoring force of the spring portion 4.

  Thereby, the block main body 3 and the frame 2 are in close contact with each other without any gap, and the play of the block main body 3 with respect to the frame 2 due to the overstroke of the lock portions 8 and 9 is prevented. By eliminating the looseness of the block main body 3, it is possible to prevent abnormal noise when the electric junction box 1 is mounted on the vehicle, wear of the lock portions 8 and 9 between the block main body 3 and the frame 2, and damage to fuses and relays. Is done.

  Further, in FIG. 4A, when the block main body 3 is not fully pushed into the frame 2 from the bottom to the top and incomplete fitting occurs (see FIG. 10), the block 3 in FIG. The arm 7 of the shaft portion 5 is positioned below the protrusion 6 of the shaft portion 5, and the protrusion 6 of the shaft portion 5 is not inserted between the arms 7 by the pushing operation of the shaft portion 5 of FIG. Since the operator does not push outward outwardly, the operator notices that the pushing force of the shaft portion 5 is considerably smaller than usual by the hand feeling, thereby detecting incomplete fitting of the block body 3 to the frame 2. .

  Even if an abnormality is not noticed at the stage of FIG. 4B, when the pressing operation of the shaft portion 5 in FIG. 4C is released (the hand is released from the shaft portion 5), the spring portion 4 is rapidly moved. Since restoration is performed, incomplete fitting of the block body 3 to the frame 2 is detected. A synthetic resin lower cover and upper cover (not shown) are attached to the frame 2, and the frame 2, the blocks 3, the lower cover, and the upper cover constitute an electrical junction box 1.

  In the above embodiment, the frame 2 is provided with the spring portion 4 and the downward shaft portion 5, and the block body 3 is provided with the upward arm 7. For example, the frame 2 is provided with the downward arm 7, and the block body 3 If the spring part 4 and the upward shaft part 5 are provided on the upper and lower parts of FIGS. 4A to 4C, the protrusions 8 for locking the frame 2 and the block body 3 are locked. The clearance S caused by the overstroke with the arm 9 can be absorbed by the spring portion 4 to be small or zero.

  Moreover, in the said embodiment, although the membrane plate-shaped thing was integrally provided as the spring part 4, it replaced with a membrane plate-like thing, for example, a wave shaped leaf | plate spring, and the coil spring which was gradually expanded in diameter helically Etc. (not shown) may be provided integrally or separately. In the above embodiment, the shaft portion 5 is provided with a pair of protrusions 6 and the pair of protrusions 6 is provided with a pair of arms 7. However, instead of the pair, for example, the shaft portion 5 is provided with one protrusion 6 or claw. It is also possible to provide one arm 7 having one protrusion 7b.

  5 to 8 show a second embodiment of a block fitting type electric junction box according to the present invention.

  As shown in FIG. 5 to FIG. 6A and FIG. 6B, this block fitting type electric junction box 31 includes a synthetic resin frame 32 and a synthetic resin block inserted and fitted into the frame 32 from the bottom up. The main body 33 is provided with a fuse puller mounting portion (mounting portion) 35 into which the fuse puller (locking member) 34 is inserted in the frame 32, and the block main body 33 protrudes downward from the fuse puller mounting portion 35. A pair of projections (members to be locked) 36 for engaging the pair of leg portions 34a of the fuse puller 34 are provided, the fuse puller 34 is pushed into the fuse puller mounting portion 35, and the tip side of the pair of leg portions 34a of the fuse puller 34 is provided. The claws 34b are engaged with the projections 36 of the block main body 33, so that the frame 32 and the block main body 33 are brought into close contact with each other in the vertical direction without any gap. 9 and the engagement gap between the lock portions 8 and 9 between the block body 33, that is, the locking projection (lock portion) 8 of the frame 32 similar to the conventional FIG. 9 and the locking arm (lock portion) of the block body 33. ) Even if there is a clearance S between the frame body 32 and the frame 32, the block body 33 is prevented from rattling with respect to the frame 32.

  As shown in FIGS. 5 and 7, the frame 32 has front and rear vertical outer walls 10 to 13 and vertical partition walls 14 in the XY directions intersecting the outer walls 10 to 13. A fuse block main body 33 which is an example of the main body is inserted and fitted from the bottom to the top. The fuse block main body 33 has a mounting portion 15 for a small blade-type fuse (not shown), a mounting portion 16 for a large fusible link (not shown), and the like on the upper portion thereof. A fuse block (block) (substitute with reference numeral 33) is configured by mounting such electrical parts.

  Locking protrusions 8 (FIG. 7) are provided on the inner surfaces of the outer walls 10 and 12 of the frame 32 that accommodates the fuse block body 33 and the partition wall 14, and the protrusions 8 are inclined upward and downward. A flexible arm 9 having locking projections 9a for the projections 8 is provided on the outer surface of the fuse block main body 33, and the projections 9a of the arms 9 are It has an upward inclined surface 9b (FIG. 9) and a downward substantially horizontal locking surface 9c (FIG. 9). These locking structures are the same as in the conventional example of FIG.

  In FIG. 5, an electric wire (not shown) terminal-connected to a fuse or the like is led out below the fuse block 33 and is inserted and accommodated from a lower space of the frame 32 into a lower cover (not shown). Frames 2, 32, block main bodies 3, 33, etc., other than the configuration of the spring part 4, the shaft part 5, the arm 7 of the first embodiment, and the fuse puller mounting part 35 and the projection 36 of the second embodiment. Both of the configurations are the same.

  As shown in FIG. 5, the plate-like horizontal wall portion 18 and the plate-like vertical wall portion 19 orthogonal to both the left and right sides of the horizontal wall portion 18 are vertically cut into the inner surface of the outer wall 10 on the front side of the frame 32. A fuse puller mounting portion 35 is integrally formed on the horizontal wall portion 18 with a resin, and the wall portions 18 and 19 having a reverse concave shape in the longitudinal section are mounted on the rear fuse integrated with the frame 32. Following the portion 20, the fuse mounting portion 20 is integrally connected to the respective partition walls 14 ′ in the XY directions, and the partition wall 14 ′ is continuously connected to the outer walls 11 and 12.

  As shown in FIG. 6A, the fuse puller mounting portion 35 includes a rectangular cylindrical peripheral wall (substitute with reference numeral 35) composed of left and right tapered (inclined) plate walls 38 and front and rear vertical plate walls 39, and front and rear. It is comprised with the perpendicular | vertical center partition 40 which connects the board wall 39 of this. Each of the left and right plate walls 38 is composed of an upper vertical portion 38a, a lower vertical portion 38b on the lower end side, and a long inclined portion 38c on the intermediate side. The upper vertical portion 38a protrudes upward from the horizontal wall portion (upper wall) 18 of the frame 32, and the horizontal wall portion 18 continues integrally with the outer surface of the upper vertical portion 38a. The lower end 38 d of the vertical portion 38 b on the lower end side is located on the same plane as the lower ends 19 a of the left and right vertical wall portions 19 orthogonal to the upper wall 18.

  As shown in FIG. 5, the upper surface of the horizontal upper wall 22 of the block body 33 abuts the lower end 38 d of the fuse puller mounting portion 35 of the frame 32 and the lower ends 19 a of the left and right wall portions 19. As shown in FIG. 6B, a rectangular hole 23 is provided through the upper wall 22 of the block body 33, and an inner wall 23 a before and after the hole 23 is connected to the center of the hole 23 to make a vertical partition wall. (Plate wall) 41 is integrally provided, and a pair of protrusions 36 for locking the fuse puller are provided on the left and right outer surfaces of the partition wall 41 at an intermediate position in the height direction of the partition wall 41, and each protrusion 36 has an upward inclined surface 36a. And a downward horizontal locking surface 36b.

  As shown in FIG. 5, the partition 40 of the fuse puller mounting portion 35 and the partition 41 of the block body 33 are located on the same plane, and the lower end 40 a (FIG. 6) of the partition 40 abuts on the upper end 41 a (FIG. 6) of the partition 41. . The inner surface of the vertical portion 38 b (FIG. 6) on the lower end side of the left and right plate walls 38 of the fuse puller mounting portion 35 is located on the same plane as the left and right inner wall surfaces 23 b (FIG. 6) of the hole 23 of the block body 33.

  As shown in FIG. 5, the fuse puller 34 is an existing one formed of a synthetic resin, and includes a pair of left and right lower leg portions 34a, an upper half opening operation portion 34c following each leg portion 34a, and left and right operations. A downwardly curved plate-shaped (arc-shaped) spring portion 34d that connects the portions 34c, and a claw (projection) 34b provided on the lower end inner surface of each leg portion 34a.

  The operation portion 34c has a plurality of horizontal protrusions 34c 'for preventing slipping on the outer surface, and the claw 34b has an upward horizontal locking surface and a downward inclined surface. The lower half step 34e of the leg 34a is positioned above the claw 34b, and the projection 36 of the block body 33 is held between the claw 34b and the step 34e. The upper half side of the operation portion 34c is formed vertically, and the lower half side is inclined, and the spring portion 34d is connected between the upper half and the lower half, and the inclined lower half of the operation portion 34c is inclined. Of the leg 34a. The left and right leg portions 34a are slightly separated in the opening direction with a gap (slit) in a free state.

  The left and right leg portions 34a are opened by gripping the operating portion 34c against the bias of the spring portion 34d in a free state, and the respective claws 34b are engaged with the step portions on both sides in the thickness direction of a blade-type fuse (not shown). The fuse 34 is pulled in the closing direction by the restoring force of the spring portion 34d, the fuse puller 34 is pulled up in this state, and the fuse is extracted from the fuse mounting portions 15 and 20.

  As shown in FIG. 5, by inserting (pushing) the fuse puller 34 downward into the fuse puller mounting portion 35 from above, the lower half of the operation portion 34c and the upper half of the leg portion 34a are connected to the fuse puller mounting portion 35. The intermediate portion in the height direction of the operation portion 34c is in contact with the upper vertical portion 38a of the left and right plate walls 38, and the fuse puller mounting portion is located between the left and right leg portions 34a. The 35 vertical partition walls 40 enter, and the upper end 40b (FIG. 6) of the partition wall 40 abuts (elastically contacts) the lowermost portion of the center of the spring portion 34d.

  At the same time, the lower half of the leg 34a enters the hole 23 of the block body 33, and the upper half of the partition wall 41 in the hole 23 enters the lower half of the left and right legs 34a. While the claw 34b at the lower end of the leg 34a rides on the left and right protrusions 36 of the partition wall 41, the leg 34a opens outward, and at the same time the claw 34b gets over the protrusion 36, the leg 34a is restored by the elasticity of the spring 34d. The engaging surface at the upper end of the claw 34b abuts and engages with the engaging surface 36b (FIG. 6) at the lower end of the projection 36 without any gap.

  While the partition wall 40 elastically bends the spring portion 34d upward, the leg portion 34a moves downward and the claw 34b engages with the projection 36, so that the fuse puller 34 is upward due to the restoring force of the spring portion 34d. Pushed up, the claw 34 b pulls up the block body 33. Thereby, the block main body 33 and the frame 32 are in close contact with each other in the vertical direction, and the play of the block main body 33 with respect to the frame 32 is prevented.

  Even if the partition wall 40 is not in contact with the spring portion 34d, the fuse puller 34 is pushed into the fuse puller mounting portion 35 and the claw 34b is moved over and engaged with the protrusion 36, so that the inclination of the fuse puller 34 is increased. The block main body 33 and the frame 32 are moved in the vertical direction by the contact between the outer side surface of the ring shape and the right and left inclined wall portions 38 of the fuse puller mounting portion 35 and the engagement between the claw 34b and the projection 36 without a gap. The block main body 33 is prevented from rattling with respect to the frame 32.

  At the right end of the upper wall 22 of the block main body 33, a vertical wall portion 24 (FIG. 6) for guiding along the vertical right wall 19 of the inverted concave wall portions 18, 19 of the frame 32 is erected. A wall portion 25 that is vertically downward is suspended from the left and right sides of the wall 22, and a space 26 is defined below the hole portion 23 by being surrounded by the wall portions 22 and 25. As shown in FIG. 5, the upper wall 22 is positioned slightly lower than the upper ends of the other fuse mounting portions 15 and the like of the block body 33.

  As shown in FIG. 7, a block main body 33 (precisely, a block containing a terminal with an electric wire or the like) is inserted into the frame 32 from the bottom upward, and the locking arm 9 of the block main body 33 is inserted into the protrusion 8 of the frame 32. A slight clearance S corresponding to the overstroke between the locking surface at the lower end of the projection 9a of the arm 9 and the locking surface 8b at the upper end of the projection 8 of the frame 32 (see FIG. 9). However, since the pair of claws 34b of the fuse puller 34 for backlash engagement is engaged between the pair of protrusions 36 of the block main body 33 without any vertical gap, the vertical backlash of the block main body 33 is prevented. Yes. By eliminating the backlash of the block main body 33, it is possible to prevent abnormal noise when the electric junction box 31 is mounted on the vehicle, wear of the lock portions 8 and 9 between the block main body 33 and the frame 32, damage to fuses, relays, and the like. Is done.

  Further, as shown in FIG. 8, when the block main body 33 is not fully pushed into the frame 32 from the bottom to the bottom and incomplete fitting (the lock portions 8 and 9 are not engaged) occurs. Since the protrusion 36 for looseness is greatly separated downward from the claw 34b of the fuse puller 34 on the frame 32 side and the protrusion 36 does not engage with the claw 34b, the fuse puller 34 is not locked (locked), and the work When a person detects an abnormality due to a difference in hand feeling during normal puller locking, or when the fuse puller 34 is pulled lightly upward, the fuse puller 34 can be easily removed from the fuse puller mounting portion 35, thereby blocking Insufficient pushing of the main body 33 is detected. A synthetic resin lower cover and upper cover (not shown) are attached to the frame 32, and the frame 32, the block 33, the lower cover, and the upper cover constitute an electrical junction box 31.

  In the second embodiment, the fuse puller mounting portion 35 is provided upward on the frame 32, the fuse puller (lock member) 34 is inserted downward into the fuse puller mounting portion 35, and the fuse puller 34 is inserted into the block body 33. For example, a fuse puller mounting portion 35 is provided downward on the block main body 33, and a fuse puller 34 is inserted upward into the fuse puller mounting portion 35. When the claw 34b of 34 is engaged with the projection 36 provided on the frame 32, the clearance S () caused by the overstroke between the locking projection 8 of the frame 32 and the locking arm 9 of the block body 33 is obtained. 9) can be absorbed and reduced to zero or smaller. However, in this case, it cannot be denied that the workability of attaching and detaching the fuse puller 34 is lowered.

  In each of the first and second embodiments, the block main bodies 3 and 33 are provided with the locking arms 9 and the frames 2 and 32 are provided with the locking projections 8. 33 can be provided with locking projections 9 and the frames 2 and 32 can be provided with locking arms 9. In this case, the protrusion 8 has an upward inclined surface 8a and a downward locking surface 8b, the arm 9 is formed to protrude upward, and the protrusion 9a of the arm 9 has a downward inclined surface 9b and an upward locking surface 9c. Have. Instead of providing the projection 9a on the arm 9, a step portion (9c) (not shown) may be provided on the distal end side of the arm 9. It is also possible to provide locking projections on the block bodies 3 and 33 and the frames 2 and 32, respectively (however, it is difficult to release the locking). It is also possible to provide the arm 9 on the block main bodies 3 and 33 and to provide the frames 2 and 32 with recesses (not shown) (with locking surfaces) for engaging the projections 9 a of the arms 9 of the block main bodies 3 and 33.

  Further, in each of the above embodiments, the example in which the fuse blocks 3 and 33 are applied as blocks has been described. However, it is also possible to apply a relay block, a connector block, or the like in addition to the fuse block. The fuse puller 34 may be arranged in these relay blocks.

  The block fitting type electric junction box according to the present invention is mounted on an automobile, for example, to prevent play of a fuse block or the like in the frame due to vibration of the vehicle, or to securely fit the fuse block or the like in the frame without incomplete fitting. Can be used to assemble.

1,31 Block fitting type electric junction box 2,32 frame 3,33 Block body (block)
4 Spring part 5 Shaft part 5a Press operation part 6 Protrusion 7 Arm (locked member)
8 Protrusion (lock part)
9 Arm (locking part)
21 Lock member 34 Fuse puller (lock member)
34b Claw 34d Spring portion 35 Mounting portion 36 Protrusion (locked member)
40 Bulkhead S Clearance

Claims (4)

In a block fitting type electric junction box in which a block is inserted into a frame and locked by a mutual lock portion, a lock member is provided on the frame, and the lock member is provided in the block without a gap in a gap direction between the lock portions. A locked member to be engaged is provided ,
The lock member is composed of a spring portion, a shaft portion connected to the spring portion, and a protrusion provided on the shaft portion, and the locked member is a flexible arm that engages with the protrusion. There is a block fitting type electric junction box. The spring portion, the block-fitting electrical connection box according to claim 1, wherein said is of diaphragm-like to stretch in the gap direction. Claim 1 or 2 block fitting type electric connection box wherein a portion of the shaft portion is configured the pressing portion projecting from the spring unit. In a block fitting type electric junction box in which a block is inserted into a frame and locked by a mutual lock portion, a lock member is provided on the frame, and the lock member is provided in the block without a gap in a gap direction between the lock portions. A locked member to be engaged is provided,
The lock member is a fuse puller that is inserted into the mounting portion provided in the frame, the locked member, Ri projection der to be engaged with the claw of the fuse puller, the said mounting portion, of the fuse puller features and be Lube lock fitting type electric connection box that partition walls pressed against the spring portions are provided.

Images