JP4827623B2 - Press-fit terminal - Google Patents

Description

  The present invention relates to a press-fit terminal that is press-fitted into a hole provided in a mounting board.

  As shown in Patent Document 1, the conventional press-fit terminal is a terminal that is press-fit into a hole provided in the mounting board. This type of press-fit terminal is also used for connection between mounting boards. That is, the press-fit terminal is used, for example, for mounting the second mounting board on the first mounting board.

Specifically, the press-fit terminal includes an insertion shaft that is fixed by being press-fitted with a side portion sandwiched by a jig in a hole provided in the second mounting substrate, and a connection surface on the axis of the insertion shaft. The second mounting board is mounted on the first mounting board via the press-fit terminals by mounting the connection surface on the first mounting board.
JP-A-5-62728

  By the way, the conventional press-fit terminal is controlled only by the pressure from the jig when it is press-fitted into the second mounting board by the jig. Therefore, since the position of the press-fit terminal that is press-fitted in accordance with the hole diameter provided in the second mount board and the pressure at the time of press-fitting is determined in the second mount board, the amount of protrusion of the press-fit terminal press-fitted into the second mount board, that is, Variations occur in the flatness of the press-fit terminal (connection surface) called coplanarity.

  In order to suppress this variation, it is necessary to correct the protrusion amount of the press-fit terminal with respect to the second mounting board. With the conventional press-fit terminal, the coplanarity can be adjusted by pressing the connection surface on the axis of the insertion shaft. Yes. However, since the connection surface is directly pressed to adjust the coplanarity, the connection surface may be damaged, which is a problem.

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an insertion terminal that can obtain good flatness without damaging the connection surface.

The present invention was devised to achieve the above object, and in order to mount the second mounting board on the first mounting board, the connection surface for surface mounting on the first mounting board and the second mounting in pressed into holes formed in the substrate by press-fit terminal having an insertion axis that will be solder connections, the connection surfaces deviate from the axis of the insertion shaft, which is connected to the insertion axis at a higher position than the axial end of the insertion shaft In order to adjust the level of the connection surface, the shaft end is provided with a level adjustment portion for receiving pressure from the axis of the insertion shaft, and extends from the connection surface to the insertion shaft between the connection surface and the insertion shaft. A trapezoidal connection surface portion is provided .

  The press-fitting terminal of the present invention has a connection surface connected to the insertion shaft that is off the axis of the insertion shaft, and a level adjustment unit is provided on the axis so that the level can be adjusted without pressing the connection surface. The flatness of the connection surface can be adjusted by pressing the part. Thereby, according to this invention, the press with respect to a connection surface becomes unnecessary, the damage with respect to the connection surface by press can be prevented, and the favorable flatness of a connection surface can be obtained.

  Hereinafter, embodiments of the press-fit terminal according to the present invention will be described in detail with reference to the drawings. In the following description, the same constituent elements in the drawings used in the embodiments are denoted by the same reference numerals and overlapped. The description is omitted as much as possible.

  The press-fit terminal 10 of the present invention is a terminal that is press-fitted into a hole provided in the second mounting board 20 in order to surface-mount the second mounting board 20 on the first mounting board 30 as shown in FIG. For surface mounting, a plurality of press-fit terminals are used as necessary.

  As shown in FIG. 1, the press-fit terminal according to the present invention includes an insertion shaft 1 inserted into a hole provided in the second mounting substrate 20, a level adjusting unit 2 on the axis of the insertion shaft 1, and an insertion shaft 1. A connection surface portion 4 having a connection surface 3 at a position higher than the level adjusting portion 2 and connected to the insertion shaft 1 off the axis.

  The insertion shaft 1 has one shaft end press-fitted into a hole provided in the second mounting substrate 20, and the other shaft end is provided with a level adjustment unit 2. The amount of protrusion of the press-fit terminal 10 press-fitted into the mounting board is adjusted.

  The adjustment of the protruding amount of the press-fit terminal 10 is to adjust the flatness of the connection surface 3 of the press-fit terminal 10 called coplanarity. By adjusting the coplanarity, the connection surface 3 of the press-fit terminal 10 is adjusted to the second. It can be adjusted to a predetermined position with respect to the mounting board 20, and when a plurality of press-fit terminals are mounted on the second mounting board 20, variations in the flatness of the connection surfaces of the press-fit terminals 10 can be suppressed.

As shown in FIG. 1, the connection surface portion 4 connected to the insertion shaft 1 on the other side of the insertion shaft 1 includes a connection surface 3 provided to have a flat surface at a position protruding from the level adjustment portion 2. ing.
The connection surface 3 has a flat surface for surface mounting on the first mounting substrate 30, and the connection surface 3 is provided at a position higher than the level adjustment unit 2 on the axis of the insertion shaft 1. In other words, the positional relationship between the level adjustment unit 2 and the connection surface 3 is stepped, and the level adjustment unit 2 is provided on the lower side and the connection surface 3 is provided on the higher side.

  Further, the connection surface portion 4 is connected from the connection surface 3 toward the insertion shaft 1 in order to obtain an efficient current path between the insertion shaft 1 and the connection surface 3 that are press-fitted into the holes of the second mounting substrate 20. It has a trapezoidal shape with a wide connection area between the surface 3 and the insertion shaft 1.

  By the way, the press-fit terminal 10 of the present invention is formed by punching a conductive substrate as shown in FIG. 4, and the press-fit terminals 10 are coupled by a frame.

  FIG. 4 specifically shows examples of dimensions of various portions of the press-fit terminal 10 for press-fitting into a hole having a diameter of 0.9 mm drilled in the second mounting substrate 20. Without limitation, for example, various dimensions may be appropriately changed in accordance with a hole size to be drilled in the second mounting substrate 20, a mounting area and a current amount at the time of surface mounting on the first mounting substrate 30.

  Next, the operation until the press-fit terminal 10 of the present invention is press-fitted and fixed to the second mounting board and the second mounting board is surface-mounted on the first mounting board will be described with reference to FIG.

  A plurality of press-fit terminals 10 are coupled to the frame as shown in FIG. A side portion of the press-fit terminal 10 coupled to the frame is held, and the press-fit terminal 10 is separated from the frame at a location indicated as a punch fracture surface in FIG.

  A hole with a predetermined diameter is pre-drilled in the second mounting board, and a jig for holding the press-fit terminal 10 so as to press-fit one shaft end of the insertion shaft 1 of the press-fit terminal 10 cut into the hole. Apply pressure to the tool.

Thereby, the press-fit terminal 10 is temporarily retained on the second mounting substrate 20 ((a) of FIG. 3).
Thereafter, only the level adjusting portion 2 provided at the other shaft end of the insertion shaft 1 is pressed ((b) in FIG. 3), and the protruding amount of the press-fit terminal press-fitted into the second mounting board, that is, called coplanarity. Adjustment is performed so that there is no variation in the flatness of the press-fit terminal (connection surface) (FIG. 3C).

  At this time, the adjustment of the coplanarity is performed by a level measuring device (not shown) and a pressing device (pressing machine) interlocked with the level measuring device, and the pressing of the pressing device is performed based on the measurement result measured by the level measuring device. The quantity is determined and the coplanarity is adjusted to the desired level.

When the adjustment of the coplanarity is completed, the press-fit terminal 10 and the second mounting board 20 are fixed by solder or the like.
Thereafter, the second mounting substrate 20 is disposed at a predetermined position of the first mounting substrate 30, and solder is provided between the connection surface 3 of the press-fit terminal 10 fixed to the second mounting substrate and the mounting surface of the second mounting substrate. The second mounting board 20 is fixed to the first mounting board 30 via the press-fit terminals 10.

  As described above, according to the press-fit terminal 10 of the present invention, the connection surface 3 is provided at a position deviated from the axis of the insertion shaft 1, and the level adjusting unit 2 is provided on the axis of the insertion shaft 1 lower than the connection surface 3. As a result, the flatness (coplanarity) can be adjusted by pressing the level adjusting unit 2 after press-fitting into the second mounting substrate 20, and there is no need to press the connection surface 3. Thereby, the press-fit terminal 10 of the present invention can obtain good flatness of the connection surface 3 without damaging the connection surface 3 by pressing.

It is a top view which shows the press-fit terminal of this invention. It is sectional drawing at the time of carrying out the surface mounting of the 2nd mounting board to the 1st mounting board using the press-fit terminal of the present invention. It is a figure which shows the process when surface-mounting a 2nd mounting board to a 1st mounting board using the press-fit terminal of this invention. It is a figure which shows the example of a dimension of the press-fit terminal of this invention coupled with a flame | frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion shaft 2 Level adjustment part 3 Connection surface 4 Connection surface part 10 Press-fit terminal 20 2nd mounting board 30 1st mounting board

Claims (1)

In order to implement the second mounting substrate on the first mounting board, the press-fitted into the hole provided in the second mounting board and the connecting surface for surface mounting to the first mounting substrate having an insertion axis that will be solder-connected At the press-fit terminal
The connection surface deviates from the axis of the insertion shaft and is connected to the insertion shaft at a position higher than the shaft end of the insertion shaft, and is pressed from above the axis of the insertion shaft to adjust the level of the connection surface. The shaft end is provided with a level adjusting unit for receiving
A press-fit terminal comprising a trapezoidal connection surface portion extending from the connection surface toward the insertion shaft between the connection surface and the insertion shaft .

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