JP5806128B2 - 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). As a conventional example, the bus bar assembly structure shown in FIGS.

  As shown in FIGS. 10 to 13, the bus bar assembly structure 201 includes a bus bar 202 obtained by pressing a metal plate or the like, and a synthetic resin housing 203 into which the bus bar 202 is assembled.

  As shown in FIG. 10, the bus bar 202 has a rectangular plate-shaped press-fitting piece 221, a power supply connecting portion 222, and a pair of male terminal portions 223 that are electrically connected to electronic components (not shown), and these are connected. And a base 220.

  The housing 203 is provided with a fixing portion 230 to which the press-fitting piece 221 is fixed. As shown in FIG. 10, the fixing portion 230 has a rectangular parallelepiped shape. The fixing portion 230 has a press-fitting hole 204 into which the press-fitting piece 221 is press-fitted, and a groove 205 into which a portion near the press-fitting piece 221 in the base 220 is inserted. , Is provided.

  10 to 13 indicate the direction parallel to the longitudinal direction of the press-fit piece 221 and the height direction of the fixing portion 230, and the arrow X indicates the width direction of the press-fit piece 221 and the fixing portion 230. A direction parallel to the width direction is represented, and an arrow Z represents a direction parallel to the thickness direction of the press-fitting piece 221 and the thickness direction of the fixing portion 230.

  As shown in FIGS. 12 and 13, the press-fitting hole 204 is formed such 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 221 and the dimension in the thickness direction (arrow). The dimension in the Z direction) is smaller than the dimension in the thickness direction of the press-fitting piece 221.

  In the bus bar assembly structure 201 configured as described above, the press-fitting piece 221 is fixed to the fixing portion 230 by being press-fitted between the two surfaces of the press-fitting hole 204 facing in the arrow Z direction. The bus bar 202 is assembled to the housing 203 by fixing the press-fitting piece 221 to the fixing portion 230.

JP 2000-069648 A

  However, the bus bar assembly structure 201 described above has the following problems. That is, the press-fitting hole 204 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 221. In this case, the pair of male terminal portions 223 may be misaligned, or the inner surface of the press-fitting hole 204 may be scraped by the press-fitting piece 221. There was a problem that the holding power of 221 would decrease.

  Therefore, an object of the present invention is to provide a bus bar assembly structure that can improve the alignment accuracy of the bus bar and can prevent a decrease in the bus bar holding force.

  In order to achieve the above object, the invention described in claim 1 is a bus bar assembly structure including a bus bar and a housing to which the bus bar is assembled, and the bus bar is provided with a rectangular plate-shaped press-fitting piece. The housing is provided with a press-fitting hole into which the press-fitting piece is press-fitted, and the dimension in the width direction is smaller than the dimension in the width direction of the press-fitting piece from the predetermined position of the press-fitting hole to the thickness direction. A part having a dimension larger than the dimension in the thickness direction of the press-fitting piece is provided, and the part on the back side from the predetermined position of the press-fitting hole is formed so that the dimension in the width direction is smaller than the dimension in the width direction of the press-fitting piece. The bus bar assembly structure is characterized in that the dimension in the thickness direction is smaller than the dimension in the thickness direction of the press-fitting piece.

  According to the first aspect of the present invention, the dimension in the width direction is smaller than the dimension in the width direction of the press-fitting piece from the predetermined position of the press-fitting hole to the opening side, and the dimension in the thickness direction is smaller than that of the press-fitting piece. A part larger than the dimension in the thickness direction is provided, and the part on the back side from the predetermined position of the press-fitting hole is formed so that the dimension in the width direction is smaller than the dimension in the width direction of the press-fitting piece and the dimension in the thickness direction Is formed smaller than the dimension in the thickness direction of the press-fitting piece, when the press-fitting piece is press-fitted into the press-fitting hole, after the press-fitting piece is positioned at a portion closer to the opening than the predetermined position, Furthermore, it will be press-fitted into the narrower back side portion, and it is possible to prevent oblique press-fitting when press-fitted into the narrower back side portion. As a result, in a state where the bus bar is assembled to the housing, the alignment accuracy of the bus bar can be improved, and a decrease in the bus bar holding force can be prevented.

It is an exploded view of the bus-bar assembly structure concerning one embodiment of the present invention. It is sectional drawing along the AA line in FIG. It is sectional drawing along the BB line in FIG. 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 along CC line in FIG. It is sectional drawing along the DD line in FIG. FIG. 5 is a perspective view showing a state where the press-fitting piece shown in FIG. 4 is press-fitted into a press-fitting hole. It is sectional drawing along the EE line in FIG. It is sectional drawing along the FF 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. 10 in the press-fit hole. It is sectional drawing along the GG line in FIG. It is sectional drawing along the HH line in FIG.

  A “bus bar assembly structure” according to an embodiment of the present invention will be described 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.

  The bus bar 2 is connected to a rectangular plate-shaped press-fitting piece 21, a power connection portion 22 that is a portion to which electric power is input, and a pair of male terminal portions 23 that are electrically connected to electronic components (not shown). The base 20 is provided.

  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-fitting hole 4 into which the press-fitting piece 21 is press-fitted and a groove 5 into which a portion near the press-fitting piece 21 in the base 20 is inserted.

  Moreover, the arrow Y in FIGS. 1-9 represents the direction parallel to the longitudinal direction of the press-fit piece 21 and the height direction of the fixing | fixed part 30, and the arrow X is the width direction of the press-fit piece 21, and the fixing | fixed part 30 of FIG. A direction parallel to the width direction is represented, and an arrow Z represents a direction parallel to the thickness direction of the press-fitting piece 21 and the thickness direction of the fixing portion 30.

  As shown in FIGS. 2 and 3, the press-fitting hole 4 is formed in a concave shape in the arrow Y direction from the upper surface of the fixing portion 30. The press-fitting hole 4 includes an opening 40, a bottom surface 41, two surfaces 46 and 46 arranged to face each other in the arrow X direction, two surfaces 43 and 43 and two surfaces 44 and 46 arranged to face each other in the arrow Z direction, 44, the two surfaces 43, 43, the step 7 (corresponding to a “predetermined position” in the claims) located between the two surfaces 44, 44, and the opening 40. And four tapered surfaces 42, 42, 45, 45 formed.

  The two surfaces 46 and 46 are flat surfaces and are arranged in parallel to each other. The distance between these two surfaces 46, 46, that is, the dimension in the width direction of the press-fitting hole 4 is formed smaller than the dimension in the width direction of the press-fitting piece 21.

  The two surfaces 43 and 43 are flat surfaces and are arranged in parallel to each other. The distance between these two surfaces 43, 43, that is, the dimension in the thickness direction of the press-fitting hole 4 is formed to be slightly larger than the dimension in the thickness direction of the press-fitting piece 21.

  The two surfaces 44, 44 are flat surfaces and are arranged in parallel to each other. The space between these two surfaces 44, 44, that is, the dimension in the thickness direction of the press-fitting hole 4 is formed smaller than the dimension in the thickness direction of the press-fitting piece 21. The two surfaces 43 and 43 are disposed closer to the opening 40 than the two surfaces 44 and 44.

  That is, the press-fitting hole 4 has a dimension in the width direction smaller than the dimension in the width direction of the press-fitting piece 21 and a dimension in the thickness direction slightly from the dimension in the thickness direction of the press-fitting piece 21 from the step 7 to the opening 40 side. The large portion 6 is provided, and the portion 8 on the back side from the stepped portion 7 is formed so that the dimension in the width direction is smaller than the dimension in the width direction of the press-fit piece 21 and the dimension in the thickness direction is the thickness direction of the press-fit piece 21. It is formed smaller than the dimension.

  In the bus bar assembly structure 1 having the above configuration, the press-fitting piece 21 is fixed to the fixing portion 30 by being press-fitted between the two surfaces 46 and 46 of the press-fitting hole 4 and between the two surfaces 44 and 44. 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 4, as shown in FIGS. 4 to 6, after the press-fitting piece 21 is positioned at the portion 6 on the opening 40 side of the stepped portion 7, As shown in FIG. 9, since it is press-fitted into the narrower portion 8 on the back side, it is possible to prevent oblique press-fitting when press-fitted into the deeper portion 8. As a result, in a state where the bus bar 2 is assembled to the housing 3, the alignment accuracy of the bus bar 2 (particularly, the alignment accuracy of the tips of the pair of male terminal portions 23) can be improved. Further, the press-fitting piece 21 is pressed straight into the portion 8 on the back side of the step portion 7 (in the direction of the arrow Y), so that the resin of the portion 8 can be prevented from being scraped, and the four surfaces 46, 46, Since the press-fitting piece 21 can be reliably held by 44 and 44, a reduction in the bus bar holding force can be prevented. In the bus bar assembly structure 1, the primary press-fitting of the press-fitting piece 21 is performed in the portion 6 on the opening 40 side of the step portion 7, and the secondary press-fitting of the press-fitting piece 21 in the portion 8 on the back side of the step portion 8. Therefore, the peak value of the insertion force can be kept low.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Busbar assembly structure 2 Busbar 3 Housing 4 Press-fit hole 7 Step (predetermined position)
21 Press-fit piece 40 Opening

Claims (1)

In a bus bar assembly structure including a bus bar and a housing to which the bus bar is assembled,
The bus bar is provided with a rectangular plate-shaped press-fitting piece,
The housing is provided with a press-fitting hole into which the press-fitting piece is press-fitted,
On the opening side from a predetermined position of the press-fitting hole, a portion in which the dimension in the width direction is smaller than the dimension in the width direction of the press-fitting piece and the dimension in the thickness direction is larger than the dimension in the thickness direction of the press-fitting piece,
The portion on the back side from the predetermined position of the press-fitting hole is formed such that the width-wise dimension is smaller than the width-wise dimension of the press-fitting piece and the thickness-wise dimension is smaller than the thickness-wise dimension of the press-fitting piece. A bus bar assembly structure characterized by being formed.

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