JP2015090809A - Connector for board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure reliability in the connection between each terminal fitting and a circuit board without complicating the shape of a housing and that of the terminal fitting.SOLUTION: A connector C for a board comprises: a housing 10, made of synthetic resin, which is mounted on a circuit board P; a plurality of terminal fittings 20 attached to the housing 10 in parallel; a board connection part 23 formed on each terminal fitting 20 and connected while placed on the circuit board P; and a deformation allowable part 25 formed in an area of each board connection part 23 which area is opposite to the circuit board P, and easier to be crushed and deformed than the other parts of the terminal fitting 20. In the deformation allowable part 25, an area projecting beyond an imaginary reference surface S parallel to the circuit board P is crushed. Thereby, an underside area 24 (an area of each board connection part 23 which area is opposite to the circuit board P) is aligned with the imaginary reference surface S.

Description

  The present invention relates to a board connector.

  Patent Document 1 includes a housing attached to the surface of a circuit board and a plurality of terminal fittings attached in parallel to the housing, and a board connecting portion formed on the terminal fitting is placed on the surface of the circuit board. A mounting-type board connector that is soldered in the above state is disclosed. In the case of this type of board connector, the height of the board connecting portion with respect to the surface of the circuit board may vary between the terminal fittings due to deformation of the housing or the like.

  The variation in the height of the board connecting portion means that the soldering strength in each board connecting portion also varies, and the connection reliability between the terminal fitting and the circuit board is lowered. For this reason, in the board connector described in Patent Document 1, the terminal fitting can be swung with a locking shaft provided in the housing as a fulcrum, and the height of the board connecting portion with respect to the circuit board is made uniform.

JP 2011-134561 A

In Patent Document 1, since it is necessary to provide a locking shaft on the housing and to form a bearing shape for locking to the locking shaft on the terminal fitting, the shape of the housing and the terminal fitting becomes complicated, and the cost is low. There is a problem of up.
The present invention has been completed based on the above circumstances, and an object thereof is to ensure the connection reliability between the terminal fitting and the circuit board without complicating the shape of the housing and the terminal fitting.

The board connector of the present invention is
A synthetic resin housing attached to the circuit board;
A plurality of terminal fittings attached in parallel to the housing;
A board connecting portion formed on the terminal fitting and connected in a state of being placed on the circuit board;
Formed in a region facing the circuit board in the board connection part, and provided with a deformation allowing part in a form that is more likely to be crushed and deformed than other parts of the terminal fitting,
The region that protrudes from the virtual reference plane parallel to the circuit board in the deformation-permitting portion is crushed so that the area facing the circuit board in the board connecting portion is aligned with the virtual reference plane. Have

  The area that protrudes from the virtual reference plane in the deformation allowance section is crushed, so that the area facing the circuit board in the board connection section is aligned with the virtual reference plane. Is done. According to the present invention, it is not necessary to change the shape on the housing side, and for the terminal fitting, it is only necessary to provide a deformation allowing portion at the board connecting portion, so that the shape can be prevented from becoming complicated.

Rear view of the board connector of Example 1 Side view of board connector Partial enlarged rear view showing the state before the deformation restricting portion is crushed Partial enlarged rear view showing a state where the deformation restricting portion is crushed Partial enlarged side view showing the state before the deformation restricting portion is crushed Partial enlarged side view showing a state where the deformation restricting portion is crushed and processed Partially enlarged side view showing a state where the deformation restricting portion is crushed by the processing device Partially enlarged side view showing a state in which the deformation restricting portion is not crushed by the processing device

  (1) In the board connector of the present invention, the deformation allowing portion may have a triangular shape that is pointed toward the circuit board. According to this structure, a deformation | transformation permission part can be crushed reliably.

<Example 1>
A first embodiment of the present invention will be described below with reference to FIGS. The board connector C of this embodiment is a surface mount type connector that is mounted in a state of being mounted on the surface (upper surface) of the circuit board P in which no through hole is formed. In the following description, the vertical direction is defined with reference to a state in which the board connector C is attached to the horizontally oriented circuit board P as shown in FIG. Moreover, about the front-back direction, the left side in FIGS.

  The board connector C includes a synthetic resin housing 10 and a plurality of terminal fittings 20. The housing 10 has a wall-shaped terminal holding portion 11 that is substantially rectangular at right angles to the circuit board P and has a horizontally long front view, and a rectangular tube-shaped hood portion 12 that protrudes forward from the outer peripheral edge of the terminal holding portion 11. And is configured. The housing 10 is fixed to the circuit board P by fixing means such as a metal holder (not shown).

  As shown in FIG. 2, the terminal fitting 20 has a bent shape in a side view. The terminal fitting 20 extends in a cantilevered manner from the lower end of the vertical portion 22 to the rear, a tab 21 that extends horizontally forward, a vertical portion 22 that extends downward at a substantially right angle from the rear end of the tab 21. The circuit board connection part 23 is comprised. The terminal fitting 20 is attached to the housing 10 with the rear end portion of the tab 21 being press-fitted into the terminal holding portion 11 in a penetrating manner. The plurality of terminal fittings 20 attached to the housing 10 are arranged in parallel in the width direction (left-right direction). The board connection portions 23 of the plurality of terminal fittings 20 are arranged in parallel in the width direction along the surface of the circuit board P, and are connected to the surface of the circuit board P so as to be conductive by solder (not shown). The

  Since the housing 10 is made of a synthetic resin, there is a possibility that a slight deformation due to heat may occur even during the molding process using the mold or after the molding. In particular, in the connector in which the housing 10 as a whole is long in the width direction and a plurality of terminal fittings 20 are arranged in parallel in the width direction as in this embodiment, when the housing 10 is deformed to warp, the board connecting portion 23 There will be variations in the height. Further, since the terminal fitting 20 is formed by bending a wire, there is a possibility that the height of the board connecting portion 23 may vary due to a spring back or the like.

  As a countermeasure, the board connector C according to the present embodiment is designed so that the height of the board connection portion 23 is improved by devising a part of the terminal fitting 20, that is, the board connection portion 23, while the housing 10 remains in the existing shape. The problem caused by the variation of the problem is solved. As shown in FIGS. 3 and 5, the lower surface region 24 of the substrate connection portion 23 (the region facing the circuit board in the substrate connection portion described in the claims) is crushed upward relative to other portions of the terminal fitting 20. A deformation allowing portion 25 having a shape that is likely to be deformed is formed. Specifically, as shown in FIG. 3, the rear view shape of the deformation allowing portion 25 is an inverted triangle. That is, the cross-sectional area when cut in parallel with the circuit board P gradually decreases as it goes downward (in the direction of approaching the surface of the circuit board P when attached to the circuit board P).

  Also, as shown in FIG. 5, in the height direction perpendicular to the surface of the circuit board P, the thickness dimension of the board connecting portion 23 including the deformation allowing portion 25 is from the front end to the rear end (from the right end to the left end in FIG. It is a substantially constant dimension over the entire length up to. And the board | substrate connection part 23 inclines so that it may become low toward back (extension direction) entirely. However, as shown in FIGS. 5 and 6, the height of the upper end 25 </ b> H of the deformation allowing portion 25 is parallel to the circuit board P (that is, substantially horizontal). Therefore, the thickness dimension of the deformation allowing portion 25 is the maximum at the rear end of the substrate connecting portion 23 and the minimum at the front end of the substrate connecting portion 23. That is, the crushing allowance to the upper side of the deformation | transformation permission part 25 is the largest in the rear end of the board | substrate connection part 23. FIG.

  The deformation allowing portion 25 having the above-described configuration is crushed by a predetermined amount as necessary. Accordingly, in all the terminal fittings 20, the lower ends of the board connection portions 23 are arranged at the same height as the virtual reference plane S parallel to the surface of the circuit board P. If the lower ends of the board connection portions 23 of all the terminal fittings 20 are arranged at the same height, the positional relationship in the vertical direction between the surface of the circuit board P and the lower end of the board connection portion 23 becomes constant. Connection (adhesion) to is also stable in all the terminal fittings 20.

  As shown in FIGS. 7 and 8, the deformation allowable portion 25 is crushed by using a processing device 30. The processing device 30 includes a plurality of holding jigs 31 corresponding to the terminal fittings 20 and a hitting jig 33. Each holding jig 31 slides horizontally from a standby position (not shown) to a holding position that overlaps the upper surface 26 of the board connection portion 23. The slide operation of the holding jig 31 is performed individually and independently. When crushing, the board connecting portion 23 is arranged in front of the holding jig 31 waiting at the standby position, and in this state, the holding jig 31 is slid to the holding position to place the board connecting portion. 23 is brought into contact with the upper surface 26 of the head 23. Thereby, the board | substrate connection part 23 is hold | maintained so that it may not displace upwards.

  Moreover, although the height of the board | substrate connection part 23 has dispersion | variation, as a countermeasure, the upper surface 26 of the board | substrate connection part 23 is a plane inclined so that it may become low toward back (free end direction). The holding jig 31 is formed with a holding surface 32 that is inclined so as to be parallel to the upper surface 26 of the substrate connecting portion 23. Therefore, even if the height of the board connecting portion 23 varies, when the holding surface 32 comes into contact with the upper surface 26 of the board connecting portion 23 in a state of contact with the surface, the holding jig 31 moves forward (holding position side). When the slide stops, all the board connection parts 23 are held in a state in which upward displacement is restricted.

  Further, the hitting jig 33 is displaced upward from a standby position (not shown) to a processing position that rapidly approaches the lower surface region 24 of the substrate connecting portion 23. The striking jig 33 has a striking surface 34 having a certain height corresponding to all the substrate connecting portions 23 at the same time. When the crushing process is performed, the substrate connecting portion 23 is disposed above the hitting jig 33, and in this state, the hitting jig 33 is moved up from the standby position to the processing position. In a state where the hitting jig 33 is in the processing position, the hitting surface 34 coincides with the virtual reference surface S in the height direction.

  The virtual reference plane S is a plane parallel to the surface of the circuit board P (surface to which the board connecting portion 23 is connected) in a state where the board connector C is properly attached to the circuit board P. On the other hand, it is set to have a predetermined height relationship. That is, the virtual reference plane S coincides with an appropriate height at which the lower surface region 24 of the board connecting portion 23 should be positioned when the board connecting portion 23 is properly fixed to the circuit board P by solder.

  When the hitting jig 33 is raised to the processing position, as shown in FIGS. 4, 6, and 7, the portion below the virtual reference surface S in the deformation allowing portion 25 is crushed by the pressing surface 34. The lower surface region 24 of the 20 substrate connecting portions 23 is aligned with the same height as the virtual reference plane S. As shown in FIGS. 3 and 8, when there is a substrate connecting portion 23 whose bottom end is the same height as the virtual reference plane S, the deformation allowing portion 25 is determined by the hitting jig 33. No crushing is performed.

  As described above, the board connector C of this embodiment includes the synthetic resin housing 10 attached to the circuit board P and the plurality of terminal fittings 20 attached in parallel to the housing 10. The board connecting portion 23 formed in the above is connected by solder while being placed on the circuit board P. In the lower surface region 24 (region facing the circuit board) of the board connection portion 23, a deformation allowing portion 25 having a form that is more likely to be crushed and deformed than other portions of the terminal fitting 20 is formed. A region protruding from the virtual reference plane S parallel to the circuit board P in the deformation allowing portion 25 is crushed in advance before connection by solder, so that the lower surface region 24 is aligned with the virtual reference plane S. .

  According to this configuration, the region protruding from the virtual reference plane S in the deformation allowing portion 25 is crushed so that the lower surface regions 24 of the board connection portions 23 of all the terminal fittings 20 are aligned with the virtual reference plane S. Therefore, proper connection by soldering is performed for all the terminal fittings 20. Thus, the board connector C according to the present embodiment does not require a change in shape on the housing 10 side, and the terminal fitting 20 only needs to be provided with the deformation allowing portion 25 in the board connecting portion 23, so that the shape is complicated. While avoiding, the connection reliability between the terminal fitting 20 and the circuit board P can be ensured. In addition, since the deformation allowing portion 25 has a triangular shape pointed toward the circuit board P, the deformation allowing portion 25 can be reliably crushed.

<Other embodiments>
The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the deformation-permitting portion has a triangular shape, but the deformation-permitting portion can have various shapes such as a trapezoidal shape, an arc shape, and a bifurcated shape. In short, the deformation-permitting portion may be in a form that is more likely to be crushed and deformed than the region other than the deformation-permitting portion in the terminal fitting.

C ... Board connector P ... Circuit board S ... Virtual reference plane 10 ... Housing 20 ... Terminal metal fitting 23 ... Board connection part 24 ... Lower surface area (area facing the circuit board in the board connection part)
25 ... Deformation allowable part

Claims (2)

A synthetic resin housing attached to the circuit board;
A plurality of terminal fittings attached in parallel to the housing;
A board connecting portion formed on the terminal fitting and connected in a state of being placed on the circuit board;
Formed in a region facing the circuit board in the board connection part, and provided with a deformation allowing part in a form that is more likely to be crushed and deformed than other parts of the terminal fitting,
A region protruding from a virtual reference plane parallel to the circuit board in the deformation allowing portion is crushed so that a region facing the circuit board in the board connecting portion is aligned with the virtual reference plane. Board connector.   The board connector according to claim 1, wherein the deformation allowing portion has a triangular shape pointed toward the circuit board.

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