JPH07153507A - Connector surface mounting mechanism - Google Patents

Abstract

PURPOSE:To prevent disconnection between a circuit board and a contact in a connector fabricating process and easily, surely realize electrical connection at low cost. CONSTITUTION:At least one fitting groove 11 extending inward from the edge of a circuit board 10 is installed, and a slit-shaped opening 13 is installed along a pad surface 12 and in its vicinity. A rib 7 comprising an inserting plate 7A for inserting into the fitting groove 11 and a wide stopping plate 7B arranged at its lower end is installed. A projection 6 extending downward, which is inserted into the slit-shaped opening 13 when the rib is inserted into the fitting groove 11 is installed on the side surface at the tip of a connecting surface 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a connector surface mounting mechanism,
In particular, the present invention relates to a mounting mechanism of an SMT (surface mounting technology) compatible connector.

[0002]

2. Description of the Related Art A widely known conventional technique for mounting a surface mount type connector on a circuit board is disclosed in Japanese Utility Model Laid-Open No. 52964/1993. In the figure, the connector 110 mounted on the surface of the circuit board P has screw retaining portions on both side surfaces of the insulating housing 111 and includes a plurality of contacts 112 protruding from the rear surface of the insulating housing 111. The plurality of contacts 112 include a connection surface 113 that extends in parallel with the circuit board P, bends downward in a crank shape, and contacts the pad surface P1 of the circuit board P.

Further, a ridge 114 extending downward is provided at the tip of the connecting surface 113. On the other hand, a through hole is provided on the pad surface P1 of the circuit board P, and the protrusion 114 is inserted into this through hole. At the time of connection, after applying cream solder to the pad surface P1 in advance, each contact 1 of the connector 110
After the connection surfaces 113 of the twelve are positioned so as to be in contact with the corresponding pad surface P1, the connector 110 is screwed onto the circuit board P with the screws 116, and solder welding is performed.

[0004]

As described above, according to the prior art, after the connector is arranged on the circuit board and before the soldering process in the reflow furnace or the like, both of them are mounted as shown in FIG.
As shown in FIG. However, due to this tightening work, the housing 111 rotates together with the screw 116 as an axis, and this rotation causes the contact 112 to move in position. As a result, the screw 116 is attached to the ridge 114 at the tip of the contact 112. A force R that moves on a circular orbit centered at is applied.

This causes a disadvantage such that the contact 112, which has been temporarily enclosed in the through hole of the pad surface P1, deviates from the pores of the protrusion 114, and at the time of this deviation, the protrusion 114 causes the pad surface to move. The cream solder on P1 is scraped or pushed to collect in one direction, or the cream solder is extruded from the pad surface P1 to cause the solder to remain on the insulating portion, which is an undesirable state. Since these make reliable soldering difficult, they cause not only defective products but also workability in the field.

Further, even if the protruding surface 114 of the pad surface P1 does not deviate from the through hole, solder welding is performed while the stress of the rotating force is applied, so that peeling may occur during use or rust or corrosion may occur. It is also a cause of various problems such as remarkable.

The present invention has been made to solve the above problems and drawbacks, and its purpose is to prevent the occurrence of displacement between the substrate and the contactor during the assembly process of the connector, and to ensure reliable electrical operation with easy work. The present invention provides a connector surface mounting mechanism that realizes physical connection at low cost.

[0008]

In order to achieve the above object, a connector surface mounting mechanism according to the present invention comprises a board having a pad surface for electrical connection on which a solder material is placed, and a board protruding from an insulating housing. A board provided with at least one contactor having a connecting surface at a tip thereof, the connector being connected to the pad surface when the insulating housing is mounted on the board, At least one fitting groove extending from the edge of the pad to the inside of the substrate, a slit-shaped opening is provided near the pad surface along the side of the pad surface, and the fitting groove is connected to the bottom of the insulating housing. A rib composed of an insertion plate to be inserted into and a wide stop plate continuously provided at the lower end thereof is provided, and the rib is inserted into the slit-shaped opening when the insertion of the rib into the fitting groove is completed, It is characterized in that a projecting portion extending in the configuration provided on the side surface near the tip of the connecting surface.

[0009]

When the insertion plate connected to the bottom of the housing is inserted into the fitting groove extending from the edge of the board in the X-axis direction and pushed in in the X-axis direction, the insertion plate moves along the fitting groove. Smoothly in the X-axis direction. Therefore, the connector does not generate rattling such as rotating on the XY plane.

Further, the stop plate acts to prevent looseness in the vertical direction (Z-axis direction). That is, Y of the connector
Deviations in the axial and Z-axis directions are remarkably improved by the action of the rib and the fitting groove.

Further, when the rib is completely inserted into the fitting groove, a downwardly extending protrusion provided on the side surface near the tip of the connecting surface is
The connector is prevented from being displaced in the X-axis direction by being fitted and locked in the slit-shaped opening provided near the pad surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to FIG.
~ It demonstrates based on FIG. FIG. 1 is a perspective view showing a basic form of a connector surface mounting mechanism according to the present invention. In the figure, 10 is a substrate, on the surface of which a conductive pad surface 1 for electrical connection with the contacts 4A, 4B of the connector 2 is provided.
2A and 12B are formed. Conductive pad surface 12A,
Cream solder 16 is applied to the surface of 12B.

Further, slit-shaped openings 13A and 13B are provided along the sides of the pad surfaces 12A and 12B and near the pad surfaces 12A and 12B, and further, at least one opening is provided from the edge of the substrate 10 toward the inside. And a fixing hole 14 for locking the insulating housing 3 of the connector 2 with a screw 15 is transparently provided.

The connector 2 has an insulating housing 3 and a plurality of thin plate-shaped contacts 4A and 4B projecting from the insulating housing 3. The contacts 4A, 4B are arranged at a plurality of vertical and horizontal positions on the rear surface of the insulating housing 3, protrude from the housing 3 in parallel with the substrate 10, and then are bent in a crank shape toward the substrate side.
The tip end portion has connection surfaces 5A and 5B which come into contact with the respective pad surfaces 12A and 12B of the substrate 10.

The fitting groove 11 is connected to the bottom of the housing 3.
A rib 7 composed of an insertion plate 7A to be inserted into and a wide stop plate 7B continuously provided at the lower end thereof is provided, and when the rib 7 is completely inserted into the fitting groove 11, a slit-shaped opening 13 is formed.
Protruding portions 6A, 6 extending downward, which are inserted into A, 13B.
B is provided on the side surface near the tips of the connection surfaces 5A and 5B.

2 to 4 show the respective states when the connector surface mounting mechanism shown in FIG. 1 is fitted, FIG. 2 is a top view, FIG. 3 is a side view, and FIG. 4 is a rear view. . As shown in these figures, when the insertion of the rib 7 into the fitting groove 11 is completed, the fixing hole 8A provided in the fixing piece 8 for fixing the housing 3 to the substrate 10 and the fixing hole 14 provided in the substrate 10 are shown. The axes of and match. Therefore, the housing 3 is fixed to the substrate 10 by screwing the screws 15 into the fixing holes 8A and the fixing holes 14. Further, at the time of this fitting, the pad surfaces 12A, 12
The contactors 4A and 4B are bonded onto B, and the cream solder 16
Is sandwiched between them.

5 to 7 are side views for explaining the assembling process of the connector surface mounting mechanism of FIG. FIG. 5 is a side explanatory view corresponding to the state of FIG. 1, and shows the stop plate 7 of the housing 3.
The state before inserting B into the fitting groove 11 of the board | substrate 10 is shown. In FIG. 6, the insertion of the stop plate 7B into the engagement groove 11 is started, and the protrusions 6A and 6B move in the plus X direction while riding on the substrate 10.

During this time, the contacts 4A, 4B are elastically displaced,
The connection surfaces 5A and 5B are placed higher than the pad surfaces 12A and 12B, and this position continues. Therefore, during this period, the cream solder applied to the pad surfaces 12A and 12B is maintained as it is. Further, FIG. 7 shows a state close to the completion of fitting and insertion, and it can be seen that the projecting portions 6A and 6B are located at positions immediately before insertion into the openings 13A and 13B, respectively.

FIG. 8 is an explanatory plan view of the essential parts of the assembly process of the connector surface mounting mechanism of FIG. As shown in the figure, the contacts 4A and 4B move in the plus X direction in the figure by inserting the rib 7 into the fitting groove 11,
The tips of the contacts 4A and 4B have a part of their widths extended in a direction perpendicular to this direction of travel to a position where they do not contact the pad surfaces 12A and 12B, and projecting portions 6A and 6B extending downward to the side surfaces thereof. It is provided.

For example, the contactor 4A has a plus Y at its tip.
A projecting portion 6A is provided at the outer end in the direction. The protruding portion 6A is
From the illustrated mode, the position further extends in the plus X direction, but the position in the plus Y direction is the pad surface 12 disposed on the substrate 10.
B, since it further exceeds the solder area of 12A, even if the fitting of the rib 7 progresses, it passes slightly off the lower end of the pad surface 12B (according to FIG. 8) and reaches the pad surface 12A. However, it does not traverse the solder region, it proceeds with a slight distance, and eventually reaches the opening 13A, falls into this opening, and is fitted and locked. At the same time, the connecting surface 5
A also correctly falls onto the pad surface 12A on which the cream solder 16 is placed and is correctly joined.

On the other hand, the contactor 4B operates in substantially the same manner. The contactor 4B is provided with a protrusion 6B at the outer end in the minus Y direction of the tip thereof. After that, the protruding portion 6B further advances in the plus X direction, but since the position in the minus Y direction exceeds the solder region of the pad surface 12B arranged on the substrate 10, the fitting of the rib 7 proceeds accordingly. Then, even when the pad surface 12B is approached, the solder surface is not traversed, the solder surface is advanced by a slight distance, and eventually reaches the opening 13B to fall into the opening and be fitted and locked. At the same time, the connection surface 5B also falls properly onto the pad surface 12B on which the cream solder 16 is placed, and is properly joined.

As described above, in the process of mounting the connector 2 on the substrate 10, in the structure according to the present invention, the pad surface 12 is formed.
The cream solder 16 placed on the A and 12B contacts 4
Since it does not come into contact with A, 4B, the protruding portions 6A, 6B, etc., the problem that the cream solder 16 is biased or pushed out of the pad surfaces 12A, 12B does not occur.

The reason for this is that movement and rotation of the ribs in directions other than the advancing direction are blocked by the fitting / inserting operation of the ribs into the fitting groove, so that there is no rattling in the movement of the housing and an external force is applied. However, since there is no displacement, as a result of this, the movement of the contacts attached to the housing
This is because blurring and rattling can be eliminated.

In the above description, the structure in which the rib is provided with the stop plate has been described. However, under the condition that the working space is not sufficient, it may be difficult to apply the above-described structure in which the connector is slid and introduced from the side surface. Exists. In such a case, it is also effective to adopt a rib structure composed of only an insertion plate without a stop plate so that the rib structure can be vertically introduced from above.

[0025]

As described above, in the connector surface mounting mechanism according to the present invention, the insertion plate smoothly advances in the X-axis direction along the fitting groove, so that the connector rotates on the XY plane. Does not cause rattling. Further, the stop plate acts to prevent looseness in the vertical direction (Z-axis direction). That is, the displacement of the connector in the Y-axis and Z-axis directions is remarkably improved by the action of the rib and the fitting groove. As a result, there is no backlash in the work of inserting the connector into the board and in the work of fixing with a screw after the insertion, so that there is no gap between the pad surface and the connection surface, and therefore the applied cream solder Inconveniences such as biasing, movement, and removal from the pad surface do not occur. As a result, reliable soldering is possible, and reliability of the circuit can be improved by realizing reliable electrical connection.

Further, when fixing the screw, when the housing is properly inserted into the fitting groove, the fixing hole of the housing fixing piece and the fixing hole of the substrate are aligned at the same time. Has the advantage of being significantly improved, and realizes a significant cost reduction.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a connector surface mounting mechanism according to the present invention.

FIG. 2 is a top view of the connector surface mounting mechanism of FIG. 1 when mated.

FIG. 3 is a side view of the connector surface mounting mechanism of FIG. 1 when fitted.

FIG. 4 is a rear view of the connector surface mounting mechanism of FIG. 1 when fitted.

5 is a side view for explaining the assembling process of the connector surface mounting mechanism of FIG. 1. FIG.

6 is a side view for explaining the assembling process of the connector surface mounting mechanism of FIG. 1. FIG.

FIG. 7 is a side view for explaining the assembling process of the connector surface mounting mechanism of FIG.

FIG. 8 is an explanatory top view of the main parts of the assembly process of the connector surface mounting mechanism of FIG.

FIG. 9 is a perspective view of a conventional surface mount connector.

FIG. 10 is an enlarged view of the partial cutaway of FIG. 9.

[Explanation of symbols]

 1 Connector Surface Mounting Mechanism 2 Connector 3 Insulating Housing 4A, 4B Contact 5A, 5B Connection Surface 6A, 6B Projection 7 Rib 7A Insertion Plate 7B Stop Plate 8 Fixing Piece 8A Fixing Hole 10 Board 11 Fitting Groove 12A, 12B Pad Surface 13A, 13B Opening 14 Fixing hole 15 Screw 16 Cream solder

Claims (2)

[Claims] 1. A substrate having a pad surface for electrical connection on which a solder material is placed, and at least one contact member projecting from an insulating housing and having a connecting surface at its tip, A connector, in which the contactor is connected to the pad surface when the insulating housing is mounted on the board, comprising at least one fitting groove extending from the edge of the board to the inside of the board, A slit-shaped opening is provided in the vicinity of the pad surface along the side of the pad surface, and is composed of an insertion plate connected to the bottom of the insulating housing and fitted into the fitting groove, and a wide stop plate continuously provided at the lower end thereof. A rib is provided, and a downwardly extending protrusion that is inserted into the slit-shaped opening when the insertion of the rib into the fitting groove is completed is provided on a side surface near the tip of the connection surface. You Connector surface mounting mechanism. 2. A substrate having a pad surface for electrical connection on which a solder material is placed, and at least one contact member projecting from an insulating housing and having a connecting surface at its tip, A connector, in which the contactor is connected to the pad surface when the insulating housing is mounted on the board, comprising at least one fitting groove extending from the edge of the board to the inside of the board, A slit-like opening is provided in the vicinity of the pad surface along the side of the pad surface, and a rib that is connected to the bottom of the insulating housing and is formed of an insertion plate that is inserted into the fitting groove is provided. 2. A connector surface mounting mechanism, characterized in that a downwardly extending projecting portion that is fitted and inserted into the slit-shaped opening when completion of fitting is provided on a side surface near the tip of the connecting surface.