JP5888811B2 - Busbar assembly structure - Google Patents

Description

  The present invention relates to a bus bar assembly structure in which a bus bar is assembled to a housing of an electronic device.

  Various bus bar assembly structures for assembling a bus bar to a housing of an electronic device have been proposed (see, for example, Patent Document 1 and Patent Document 2). As a conventional example, the bus bar assembly structure shown in FIGS. 8 to 11 will be described.

  As shown in FIGS. 8 to 11, the bus bar assembly structure 101 includes a bus bar 102 obtained by pressing a metal plate or the like, and a synthetic resin housing 103 to which the bus bar 102 is assembled. ing.

  As shown in FIG. 8, the bus bar 102 is coupled with a rectangular plate-shaped press-fitting piece 121, a power supply connection portion 122, and a pair of male terminal portions 123 electrically connected to electronic components (not shown). The base 120 is provided.

  The housing 103 is provided with a fixing portion 130 to which the press-fitting piece 121 is fixed. As shown in FIG. 8, the fixing portion 130 has a rectangular parallelepiped shape, and includes a press-fitting hole 104 into which the press-fitting piece 121 is press-fitted, and a groove 105 into which a portion near the press-fitting piece 121 in the base 120 is inserted. , Is provided. Here, an arrow X in FIGS. 8 to 11 represents a direction parallel to the width direction of the press-fit piece 121 and the width direction of the fixing portion 130, and an arrow Y represents the thickness direction of the press-fit piece 121 and the fixing portion 130. The arrow Z represents the direction parallel to the longitudinal direction of the press-fitting piece 121 and the height direction of the fixing portion 130.

  As shown in FIGS. 10 and 11, the press-fitting hole 104 is formed so that the dimension in the width direction (dimension in the arrow X direction) is slightly larger than the dimension in the width direction of the press-fitting piece 121 and the dimension in the thickness direction (arrow). The dimension in the Y direction) is smaller than the dimension in the thickness direction of the press-fitting piece 121.

  In the bus bar assembly structure 101 having the above-described configuration, the press-fitting piece 121 is fixed to the fixing portion 130 by being press-fitted between two surfaces of the press-fitting hole 104 facing in the arrow Y direction. The bus bar 102 is assembled to the housing 103 by fixing the press-fitting piece 121 to the fixing portion 130.

Japanese Patent Laid-Open No. 2002-354331 JP 2005-56799 A

  However, in the bus bar assembly structure 101 described above, the press-fitting hole 104 is formed so that the dimension in the width direction (dimension in the arrow X direction) is slightly larger than the dimension in the width direction of the press-fitting piece 121. When 121 is press-fitted into the press-fitting hole 104, the press-fitting piece 121 may be press-fitted in an oblique direction with respect to the arrow Z direction. In this case, the inner surface of the press-fitting hole 104 is scraped by the press-fitting piece 121. There has been a problem that the holding power against is reduced.

  An object of the present invention is to provide a bus bar assembly structure capable of improving the bus bar holding force of a housing by preventing oblique press-fitting into a press-fitting hole portion of a press-fitting piece.

The present invention according to claim 1 is a bus bar assembly structure comprising a bus bar and a housing to which the bus bar is assembled, wherein the bus bar is provided with a press-fitting piece, and the press-fitting piece is provided in the housing. press-fitting hole to be press-fitted is provided, wherein the press-fitting piece is provided with a rectangular plate-shaped main body portion, and a protruding portion formed to protrude from the surface of the body portion, said body portion in the longitudinal direction The front end side in the press-fitting direction, which is one side, is formed to have a predetermined width dimension, the base end side of the main body is formed to be wider than the predetermined width dimension, and the protrusion is at least the predetermined width dimension Provided in a portion formed so as to have a width dimension of the first insertion portion through which the main body portion is inserted, and the protrusion portion provided continuously to the first insertion portion. A second insertion portion for insertion, and Serial first insertion portion is constituted dimension of the width direction thereof has a smaller dimension than the dimension of the widest portion in the body portion, the second insertion portion, both side surfaces in the width direction of the protruding portion It is the bus bar assembly structure characterized by having the dimension which can be slidably contacted.

  According to a second aspect of the present invention, in the first aspect of the present invention, the projecting portion is formed to extend to a base end side of the main body portion.

According to a third aspect of the present invention, in the present invention according to the first or second aspect, the main body portion is formed with a taper portion that is gradually narrowed toward the tip end side of the main body portion. Is provided continuously to the tip side of the portion formed to be wide .

  According to the first aspect of the present invention, the bus bar is provided with the press-fitting piece, the housing is provided with the press-fitting hole portion into which the press-fitting piece is press-fitted, and the press-fitting piece has a wide width provided on the base end side of the main body part. And a protrusion provided on the tip side of the wide portion, and the press-fitting hole portion has a first insertion portion formed with a width dimension smaller than the width of the wide portion, and a protrusion And the second insertion part configured to have a dimension in which the side surface in the width direction can be slidably contacted, so when the press-fitting piece is press-fitted into the press-fitting hole part, Is slidably contacted with the second insertion portion and is pushed into the inner side of the press-fitting hole, so that the tip of the press-fitting piece is guided to a predetermined position in the press-fitting hole, and the press-fitting piece is positioned and inclined. Correction is performed. Thereafter, the press-fitting piece is fixed to the housing by being press-fitted into the first insertion part in which the wide portion is formed to be smaller than the width dimension thereof, so that the press-fitting piece is fixed to the housing. The bus bar can be disposed at a predetermined position of the housing, and the press-fitting pieces can be prevented from being obliquely press-fitted. As a result, the bus bar holding force of the housing can be improved.

  According to the second aspect of the present invention, since the projecting portion extends to the base end side of the main body portion, the distal end portion of the press-fitting piece is interrupted to a predetermined position in the press-fitting hole portion. Therefore, the tip of the press-fitting piece can be reliably guided to a predetermined position in the press-fitting hole.

  According to the third aspect of the present invention, the main body portion is provided with the taper portion formed so as to gradually become narrower toward the front end side of the main body portion, continuously to the front end side of the wide portion. Therefore, when the wide part is press-fitted into the first insertion part formed smaller than the width dimension, the taper part enters the first insertion part before the wide part. It is possible to prevent the inner surface of the hole from being scraped, and to smoothly guide the wide portion into the first insertion portion.

It is an exploded view of the bus bar assembly structure concerning one embodiment of the present invention. It is sectional drawing which follows the II line | wire in FIG. (A) is the top view which looked at the press-fit piece shown by FIG. 1 from the downward direction, (B) is the top view which looked at the press-fit hole shown by FIG. 1 from the top. It is a perspective view which shows a mode that the press-fit piece shown by FIG. 1 is press-fitted in a press-fit hole. It is sectional drawing which follows the II-II line | wire in FIG. FIG. 2 is a perspective view showing a state where the press-fitting piece shown in FIG. 1 is press-fitted into a press-fitting hole. It is sectional drawing which follows the III-III line in FIG. It is an exploded view of the conventional bus bar assembly structure. It is a perspective view which shows the state which press-fit the press-fit piece shown by FIG. 8 in the press-fit hole. It is sectional drawing along the IV-IV line in FIG. It is sectional drawing along the VV line in FIG.

  A “bus bar assembly structure” according to an embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the bus bar assembly structure 1 includes a bus bar 2 obtained by pressing a metal plate or the like, and a synthetic resin housing 3 to which the bus bar 2 is assembled.

  As shown in FIG. 1, the bus bar 2 includes a press-fitting piece 21, a power connection portion (not shown) that is a portion to which power is input, and a pair of male terminals that are electrically connected to electronic components (not shown). The part 23 and the base 24 which connected these are provided.

  Moreover, the arrow X shown in FIGS. 1-7 etc. represents the direction parallel to the width direction of the press-fit piece 21 and the width direction of the fixing | fixed part 30 (it mentions later), and the arrow Y is the thickness direction of the press-fit piece 21. And the direction parallel to the thickness direction of the fixing | fixed part 30 is represented, and the arrow Z represents the direction parallel to the longitudinal direction of the press-fit piece 21, and the height direction of the fixing | fixed part 30. FIG.

  The press-fitting piece 21 is formed in a substantially rectangular plate shape, and includes a main body portion 25 whose one end in the longitudinal direction (arrow Z direction) is continuous with the base portion 24, and a protrusion portion 26 formed on the surface of the main body portion 25. Yes.

  The main body 25 includes a wide portion 25A provided on one end (base end) side in the longitudinal direction (arrow Z direction), a narrow portion 25B provided on the other end (tip end) side, a wide portion 25A and a width. The tapered portion 25C is provided between the narrow portion 25B and a tapered portion 25D provided on the tip side of the narrow portion 25B. The taper portion 25C is formed so that its width dimension gradually becomes narrower toward the narrow portion 25B (the front end side of the main body portion 25). The wide portion 25A and the narrow portion 25B are formed so that the width dimension is constant.

  The projecting portion 26 is formed by, for example, pressing a part of the main body portion 25 from the back surface thereof toward the front surface using a press device or the like, and the relative surface 27 facing the front surface of the main body portion 25. And two first side surfaces 28 (corresponding to both side surfaces in the claims) provided on both sides in the width direction (arrow X direction) of the protrusion 26, and the longitudinal direction of the protrusion 26 (arrow Z direction). And two second side surfaces 29 provided on both sides. The protruding portion 26 is provided from the wide portion 25A to the narrow portion 25B of the main body portion 25.

  The housing 3 is provided with a fixing portion 30 to which the press-fitting piece 21 is fixed. The fixed portion 30 is formed in a rectangular parallelepiped shape, and is provided with a press-fit hole portion 4 into which the press-fit piece 21 is press-fitted and a groove 5 into which a portion near the press-fit piece 21 in the base portion 24 is inserted. .

  As shown in FIGS. 1 and 2, the press-fitting hole portion 4 is formed in a concave shape in the arrow Z direction from the upper surface of the fixing portion 30. The press-fitting hole portion 4 is provided in the vicinity of the bottom surface 41, a first insertion portion 42 through which the main body portion 25 is inserted, a second insertion portion 43 through which the projection portion 26 is inserted, and an opening portion. And two tapered surfaces 45 (only one is shown in FIG. 2). The first insertion part 42 and the second insertion part 43 are provided continuously.

  As shown in FIGS. 2 and 3, the first insertion portion 42 includes two surfaces 46 arranged to face each other in the arrow X direction and two surfaces 47 arranged to face each other in the arrow Y direction. Has been. The two surfaces 46 are flat surfaces and are arranged in parallel to each other. The distance between these two surfaces 46, that is, the dimension L1 in the width direction (arrow X direction) of the first insertion part 42 is formed to be smaller than the width dimension L2 of the wide part 25A. The two surfaces 47 are flat surfaces and are arranged in parallel to each other. An interval between these two surfaces 47, that is, a dimension t1 in the thickness direction (arrow Y direction) of the first insertion portion 42 is formed smaller than a thickness dimension t2 of the main body portion 25. Alternatively, the dimension t1 in the thickness direction of the first insertion part 42 may be formed equal to the thickness dimension t2 of the main body part 25.

  As shown in FIGS. 2 and 3, the second insertion portion 43 includes two surfaces 48 arranged to face each other in the direction of the arrow X, and one surface 49 connecting the two surfaces 48. Has been. The two surfaces 48 are flat surfaces and are arranged in parallel to each other. The distance between the two surfaces 48, that is, the width dimension L3 of the second insertion portion 43 is formed to be equal to the width dimension L4 between the surfaces 28 of the protrusion 26. The one surface 49 is a flat surface and is disposed in parallel with the two surfaces 47 of the first insertion portion 42. The dimension between one surface 49 and the surface 47 of the two surfaces 47 on the one surface 49 side, that is, the dimension t3 in the thickness direction of the second insertion portion 43 is equal to the thickness dimension t4 of the protrusion 26. Is formed.

  Thus, the second insertion portion 43 is formed such that the dimension L3 between the two surfaces 48 (the dimension L3 in the width direction of the second insertion portion 43) is equal to the width dimension L4 of the projection 26, and Since the dimension t3 (the dimension t3 in the thickness direction of the second insertion portion 43) between one surface 49 and the surface 47 is formed to be equal to the thickness dimension t4 of the projection 26, the projection 26 The first side surface 28 is slidably contacted with the two surfaces 48, the relative surface 27 is slidably contacted with the one surface 49, and is pushed into the back side of the second insertion portion 43, and the distal end portion of the press-fitting piece 4 is It is guided to a predetermined position in the insertion portion 43, that is, the press-fitting hole portion 4.

  In the present embodiment, the second insertion portion 43 is configured so that the two surfaces 48 and the one surface 49 have dimensions that allow sliding contact with the protrusion 26. It is sufficient that only the dimension between the surfaces 48 has a dimension capable of slidingly contacting the protruding portion 26.

  In the above-described bus bar assembly structure 1, the press-fitting piece 21 is fixed to the fixing portion 30 by being press-fitted between the two surfaces 46 and the two surfaces 47 of the first insertion portion 42 of the press-fitting hole portion 4. The bus bar 2 is assembled to the housing 3 by fixing the press-fitting piece 21 to the fixing portion 30.

  Then, the effect of the bus bar assembly structure 1 is demonstrated. When the press-fitting piece 21 is press-fitted into the press-fitting hole portion 4, as shown in FIGS. 4 and 5, the press-fitting piece 21 has the first side surface 28 of the protrusion 26 slidably contacted with the two surfaces 48 and the relative surface 27. Is pressed into the inner side of the press-fitting hole portion 4 while being in sliding contact with one surface 49, the leading end of the press-fitting piece 21 is guided to a predetermined position in the press-fitting hole portion 4, and the press-fitting piece 21. Positioning and tilt correction are performed. Thereafter, as shown in FIGS. 6 and 7, the press-fitting piece 21 is pushed into the first insertion part 42 in which the wide portion 25 </ b> A is formed to be smaller than the width dimension thereof. Since the press-fitting piece 21 is fixed to the fixing portion 30 in a state where the press-fitting piece 21 is fixed to the fixing portion 30, the bus bar 2 is fixed to the predetermined portion 30 of the fixing portion 30. Since the resin in the vicinity of the press-fitting hole 4 can be prevented from being scraped and the press-fitting piece 21 can be securely held by the four surfaces 46 and 47 of the first insertion part 42, the housing 3 The bus bar holding power can be improved.

  Further, since the protruding portion 26 is formed to extend to the proximal end side of the main body portion 25, the distal end portion of the press-fitting piece 21 is guided without interruption to a predetermined position in the press-fitting hole portion 4. Thus, the tip of the press-fitting piece 21 can be reliably guided to a predetermined position in the press-fitting hole 4.

  Further, the main body portion 25 is provided with a taper portion 25C formed so as to gradually become narrower toward the front end side of the main body portion 25, and is provided continuously to the front end side of the wide portion 25A. When 25A is press-fitted into the first insertion part 42 formed smaller than the width dimension, the taper part 25C enters the first insertion part 42 before the wide part 25A, so the wide part 25A. Therefore, the inner surface of the press-fitting hole portion 4 can be prevented from being scraped, and the wide portion 25A can be smoothly guided into the first insertion portion 42.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Bus bar assembly structure 2 Bus bar 3 Housing 4 Press-fit hole part 21 Press-fit piece 25 Main body part 25A Wide part 26 Projection part 42 First insertion part 43 Second insertion part 45 First side surface (side surface of projection part in width direction)

Claims (3)

A bus bar assembly structure comprising a bus bar and a housing to which the bus bar is assembled,
The bus bar is provided with a press-fitting piece,
The housing is provided with a press-fitting hole portion into which the press-fitting piece is press-fitted,
The press-fitting piece is provided with a rectangular plate-shaped main body portion, and a protruding portion formed to protrude from the surface of the body portion,
The main body portion is formed so that a distal end side in the press-fitting direction, which is one side in the longitudinal direction, has a predetermined width dimension, and a proximal end side of the main body portion is formed to be wider than the predetermined width dimension. ,
The protrusion is provided at a portion formed to be at least the predetermined width dimension,
The press-fitting hole portion is provided with a first insertion portion through which the main body portion is inserted, and a second insertion portion that is provided continuously with the first insertion portion and through which the projection portion is inserted,
The first insertion portion is configured to have a dimension in which the dimension in the width direction is smaller than the dimension of the widest part in the main body part ,
The bus bar assembling structure, wherein the second insertion portion is configured to have a dimension in which both side surfaces in the width direction of the protruding portion can slide.   The bus bar assembly structure according to claim 1, wherein the protrusion is formed to extend to a base end side of the main body. The main body portion is provided with a taper portion formed so as to be gradually narrowed toward the front end side of the main body portion , continuously to the front end side of the portion formed to be wide . 3. A bus bar assembly structure according to claim 1, wherein the bus bar is assembled.

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