JP2011060598A - Surface mounted connector, and mounting method thereof - Google Patents

Abstract

Provided are a surface-mount connector and a mounting method thereof that can remove dirt, oxide film, and the like and perform good soldering without reducing productivity.
A surface mount connector 100 for soldering a contact portion 23 of a terminal 17 led out from a connector housing 11 to a pad 27 provided on a mounting surface of a substrate 15, which is suspended from a lower surface of the connector housing 11. At least a pair of assembly pins 31 having stop projections and a pair of parallel elongated holes corresponding to the pair of assembly pins 31 are drilled in the substrate 15 to allow insertion of a locking projection at one longitudinal end. And an assembly pin 31 is inserted into the insertion portion of the assembly hole 29. And a pad 27 extending in the moving direction in which the assembling pin 31 is moved to the locking portion.
[Selection] Figure 1

Description

  The present invention relates to a surface mount connector and a mounting method thereof.

  In many cases, the surface mount type connector has a large number of terminals (contact pins) at a narrow pitch. When this surface mount connector is disposed at a predetermined position on the printed board, the contact pin connecting portion is located on the mounting surface on the printed board. By subsequent soldering in the reflow process, electrical connection is made between the contact pin and the mounting surface.

  For example, Patent Document 1 introduces a surface mounting structure of a connector that can arrange contact pins on a mounting surface (on a pad) with high accuracy even in a connector in which a large number of contact pins are arranged in parallel at a narrow pitch. As shown in FIG. 14, the connector 500 includes a contact pin 501 obtained by plating a metal plate, and a synthetic resin housing 503 on which the contact pin 501 is mounted. The printed circuit board 505 includes a pad 507 that is electrically and mechanically connected to the contact pin 501, and the pad 507 includes a through hole 517.

  One end of the contact pin 501 extends outward from the housing 503 and advances straight, then toward the printed circuit board 505 and bent right above it to form a connection portion 511 at the tip. The other end is accommodated in the housing 503 and forms a contact portion 513 that waits for a fitting with a corresponding connector (not shown). When the connector 500 is placed on the printed circuit board 505, the connection unit 511 is positioned in parallel to the surface of the printed circuit board 505. The connecting unit 511 causes the pad 507 formed on the printed circuit board 505 to be grounded on the bottom surface (downward direction in the drawing). The connection portion 511 is electrically and mechanically connected to the pad 507 by passing through the reflow furnace and fixing the molten solder 515. The connector 500 includes a protrusion 519 on the bottom surface of the connection portion 511 that fits into the through hole 517 of the pad 507 and guides the contact pin 501 to the correct position on the pad 507.

JP 2009-70712 A

  However, when the connector is mounted on the printed circuit board, there is a possibility that dirt, an oxide film, or the like is generated on the contact surface of the terminal and the mounting surface of the printed circuit board due to factors over time. Due to the influence, even if the terminals are arranged at the correct positions on the mounting surface, there is a possibility that good soldering and current flow may be prevented. If the number of removal work steps for removing dirt and oxide films on the terminals and the mounting surface is increased, productivity will be reduced.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a surface mount connector that can remove dirt and oxide film and perform good soldering without reducing productivity and a mounting method thereof. There is.

The above object of the present invention is achieved by the following configuration.
(1) A surface mount connector for soldering a contact portion of a terminal led out from a connector housing to a pad provided on a mounting surface of a substrate,
At least a pair of assembly pins suspended from the lower surface of the connector housing and having locking projections;
According to the pair of assembling pins, a pair of parallel elongated holes are formed in the substrate, and an insertion portion is formed at one end in the longitudinal direction to allow the insertion of the locking projection, and the other end is formed at the other end. A mounting hole in which a locking portion for locking the locking projection is formed;
Extends in the moving direction by the distance that the assembling pin contacts the contact portion at the position where the assembling pin is inserted into the assembling hole insertion portion, and the assembling pin is moved to the locking portion. Said pad to
A surface-mounting connector characterized by comprising:

  According to this surface mount connector, at least a pair of assembly pins suspended from the lower surface of the connector housing is inserted into one end in the longitudinal direction of the assembly hole formed in the substrate. By moving the connector housing so that the assembly pin becomes the other end of the assembly hole, the engagement projection of the assembly pin is engaged with the engagement portion, and the connector housing is assembled to the board. At this time, an assembly process in which the contact portion of the terminal contacts the pad simultaneously with the insertion of the assembly pin and the assembly pin moves to the other end is used, and the contact portion is rubbed against the pad by the moving distance.

(2) The surface mount connector according to (1),
The assembly hole is formed by connecting the insertion portion formed in a round hole shape and the locking portion formed in a square hole shape with a connection groove narrower than the insertion portion and the engagement portion. Become
The assembly pin is formed with a pair of elastic separation legs inserted into the insertion portion and narrowed to the width of the connecting groove,
A surface mount type connector characterized in that a taper tapering in the moving direction is formed on the moving side of the elastic separating leg.

  According to this surface mount connector, the locking protrusion provided at the lower end of the elastic separation leg is inserted into the insertion portion, and the locking protrusion is disposed on the lower surface side of the substrate. When the elastic separating leg is moved, the elastic separating leg is elastically deformed by the taper so that the elastic separating leg can enter the connecting groove. When the elastic separation leg reaches the locking portion from the connecting groove, the elastic separating leg expands to its original width by the elastic restoring force, and the locking protrusion is locked to the locking portion.

(3) The surface mount connector of (2),
On the side opposite to the moving direction of the elastic separation leg, a corner is formed that abuts the stepped portion of the locking portion and the connection groove and restricts the elastic separation leg from retreating to the connection groove. A featured surface mount connector.

  According to this surface mount connector, when the elastic spacing leg reaches the locking portion from the coupling groove, and the elastic spacing leg spreads to the original width by the elastic restoring force, the corner portion of the elastic spacing leg is connected to the locking portion. It contacts the step at the boundary with the groove. As a result, the elastic separation leg (that is, the assembly pin) is prevented from returning to the connection groove. The assembly pin is locked at a position where it cannot be removed from the board.

(4) A mounting method of a surface mount connector in which a contact portion of a terminal derived from a connector housing is soldered to a pad provided on a mounting surface of a substrate,
Inserting at least one pair of assembly pins suspended on the lower surface of the connector housing into one end in the longitudinal direction of the parallel long hole-shaped assembly holes formed in the board;
Mounting the surface mount type connector, wherein the contact housing is rubbed against the pad by the moving distance by moving the connector housing so that the assembly pin becomes the other end of the assembly hole. Method.

  According to the mounting method of the surface mount type connector, the connector housing is assembled while being linearly moved along the assembly hole, so that foreign matters can be scraped off while utilizing the assembly process.

  According to the surface mount connector and the mounting method thereof according to the present invention, the contact pin is inserted by inserting the assembly pin of the connector housing into one end of the assembly hole and moving the connector housing to the other end. Is rubbed onto the pad for the moving distance, so that dirt and oxide films can be removed and soldered between the terminal connection surface and the pad satisfactorily without lowering productivity while using the assembly process.

It is the perspective view which represented the surface mount type connector which concerns on this invention with the board | substrate. It is a perspective view of the board | substrate shown in FIG. FIG. 3 is an enlarged view of the assembly hole shown in FIG. 2. (A) A perspective view of an assembly pin, (b) is a front view of the assembly pin, (c) is a side view of the assembly pin, and (d) is an AA arrow view. (A) is a perspective view of the assembly | attachment initial position, (b) is the top view. (A) is BB sectional drawing of FIG. 5, (b) is the C section enlarged view. It is DD sectional drawing of FIG. (A) is the perspective view in the middle of a slide, (b) is the top view. (A) is EE sectional drawing of FIG. 8, (b) is the F section enlarged view. (A) is GG sectional drawing of FIG. 9, (b) is an enlarged view of a taper. (A) is a perspective view of an assembly completion position, and (b) is a plan view thereof. (A) is HH sectional drawing of FIG. 11, (b) is J section enlarged view. (A) is KK sectional drawing of FIG. 12, (b) is the principal part enlarged view. It is sectional drawing which notched the conventional surface mount type connector by the board | substrate perpendicular | vertical surface.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a surface mount connector according to the present invention together with a substrate.
The surface mount connector 100 includes a connector housing 11 made of a resin material. The connector housing 11 is integrally formed in a substantially box shape with one side surface serving as a fitting opening 13 with a mating connector (not shown). A plurality of terminals 17 connected to a circuit (not shown) of the printed circuit board 15 are led out from the back surface opposite to the fitting opening 13. In this specification, the connector housing 11 has the fitting side as the front and the opposite side as the rear.

  In the terminal 17, the electrical contact portion 19 (see FIG. 6) protrudes toward the fitting opening 13 inside the connector housing 11. A terminal body portion (not shown) is provided at the rear portion of the electrical contact portion 19, and the rear portion of the terminal body portion serves as a lead-out portion 21 (see FIG. 5) and is bent into a crank shape and pulled out from the back surface. A contact portion 23 parallel to the surface 15 a of the printed circuit board 15 is continuously provided at the rear portion of the lead-out portion 21.

FIG. 2 is a perspective view of the substrate shown in FIG.
A mounting surface 25 is formed on the surface 15 a of the printed circuit board 15, and a plurality of pads 27 connected to the circuit of the printed circuit board 15 are formed on the mounting surface 25 so as to correspond to the contact portions 23 of the terminals 17. Yes. The contact portion 23 of the terminal 17 led out from the connector housing 11 is soldered to the pad 27. The mounting surface 25 is provided with a pair of assembly holes 29 and 29. The assembly hole 29 locks an assembly pin 31 (see FIG. 1) that is suspended from the lower surface of the connector housing 11.

FIG. 3 is an enlarged view of the mounting hole shown in FIG.
The assembly holes 29 are formed in a pair of parallel long holes according to the pair of assembly pins 31, 31 and are formed in the printed board 15. The assembling hole 29 is formed with an insertion portion 35 that allows insertion of the locking protrusion 33 (see FIG. 4) of the assembling pin 31 at one end in the longitudinal direction. Further, a locking portion 37 for locking the locking projection 33 is formed at the other end of the assembly hole 29.

  The assembly hole 29 is formed by connecting an insertion portion 35 formed in a round hole shape and a locking portion 37 formed in a square hole shape with a connecting groove 39 narrower than the insertion portion 35 and the locking portion 37. Being done. A step portion 41 is formed between the connecting groove 39 and the locking portion 37. As will be described later, the assembling pin 31 that reaches the locking portion 37 is locked to the step portion 41.

  The pad 27 has a predetermined length L and extends. This predetermined length L contacts the contact portion 23 at the position where the assembly pin 31 is inserted into the insertion portion 35 of the assembly hole 29, and the assembly pin 31 is moved to the locking portion 37. It extends long in the moving direction a (see FIG. 2) by the distance S. That is, the length L of the pad 27 is at least the length T (see FIG. 5) of the contact portion 23 plus the movement distance S (T + S) (L = T + S).

4A is a perspective view of the assembly pin, FIG. 4B is a front view of the assembly pin, FIG. 4C is a side view of the assembly pin, and FIG. 4D is an AA arrow in FIG. FIG.
Fixing blocks 43 and 43 (see FIG. 1) are integrally formed on both side surfaces of the connector housing 11 in the vicinity of the fitting opening 13. The assembling pin 31 is suspended from the lower surface of each fixed block 43. Accordingly, at least a pair of the assembling pins 31 are provided. The locking projection 33 is provided at the lower end of the assembly pin 31. The locking protrusion 33 includes protrusions 33a and 33b on both sides and a protrusion 33c on the front in the moving direction.

  The assembling pin 31 is an elastic separation leg 45 between the fixed block 43 and the locking projection 33. The elastic separating leg 45 is composed of a pair of flexible pieces 47 and 47 having a center portion bent outwardly in an O-leg shape. In the assembling pin 31, the locking projection 33 can be inserted into the insertion portion 35, and the flexible pieces 47 and 47 are elastically deformed in the approaching direction and narrowed to the width W (see FIG. 3) of the connecting groove 39.

  A taper 49 shown in FIG. 4C is formed on the moving side of the elastic separation leg 45 (the moving side to the locking portion 37), which tapers in the moving direction a. In the elastic separation leg 45, a locking projection 33 provided at the lower end is inserted into the insertion portion 35, and the locking projection 33 is disposed on the lower surface side of the printed circuit board 15. When the elastic separating leg 45 is moved, the elastic separating leg 45 is elastically deformed by the taper 49 in a direction in which the elastic separating leg 45 is narrowed, and the entry into the connecting groove 39 is possible. When the elastic separating leg 45 reaches the locking portion 37 from the connecting groove 39, the elastic separating leg 45 expands to its original width by the elastic restoring force, and the locking projection 33 is locked to the locking portion 37.

  Further, on the side opposite to the moving direction of the elastic separating leg 45, it abuts on the stepped portion 41 of the locking portion 37 and the connecting groove 39 to restrict the backward movement of the elastic separating leg 45 to the connecting groove 39 (FIG. 4). Corner portions 51, 51 shown in d) are formed. When the elastic separating leg 45 reaches the locking portion 37 from the connecting groove 39 and expands to the original width, the corner portions 51 and 51 come into contact with the step portion 41. The elastic separation leg 45 (that is, the assembly pin 31) is prevented from returning to the connecting groove 39. Thereby, the assembly pin 31 is locked at a position where it cannot be removed from the printed circuit board 15.

  A plurality of terminals 17 are led out from the connector housing 11 in a direction along the moving direction a (see FIG. 5B), and a plurality of terminals 17 are arranged in a direction orthogonal to the moving direction a. The pads 27 on the printed circuit board 15 extend in the assembly movement direction a of the connector housing 11. Thereby, when the connector housing 11 moves, the terminal 17 does not receive the reaction force in the direction intersecting the lead-out direction from the pad 27, and the terminal 17 is not bent or twisted. As a result, the contact surface 23a (see FIG. 1) of the contact portion 23 is translated in a state where the contact surface 23 is stably in surface contact with the pad 27.

Next, a method for mounting the surface mount connector will be described.
5A is a perspective view of the initial assembly position, FIG. 5B is a plan view thereof, FIG. 6A is a cross-sectional view taken along the line BB of FIG. 5, FIG. It is DD sectional drawing of.
To mount the surface mount connector 100, first, as shown in FIGS. 5 and 6, the connector housing 11 is assembled at the initial assembly position (position of the insertion portion 35) of the assembly hole 29 of the printed circuit board 15. The attaching pin 31 is inserted.

  At this time, as shown in FIG. 7, the hole diameter D of the insertion portion 35 is wider than the elastic separation leg 45 and the locking projection 33 of the assembly pin 31, so that insertion is possible.

8A is a perspective view in the middle of sliding, FIG. 8B is a plan view thereof, FIG. 9A is a cross-sectional view taken along the line E-E in FIG. 8, FIG. GG sectional drawing of FIG. 9, (b) is an enlarged view of a taper.
Next, as shown in FIGS. 8 and 9, the connector housing 11 is moved in the movement direction a so that the assembly pin 31 is positioned at the other end (the locking portion 37) of the assembly hole 29. When the connector housing 11 is slid, the assembly pin 31 moves to the connecting groove 39 which is an assembly intermediate position of the assembly hole 29 of the printed circuit board 15.

  As shown in FIG. 10, the assembling pin 31 has a taper 49 on the front surface of the elastic separation leg 45, so that it can enter the connecting groove 39. At this time, since the width W of the connecting groove 39 is narrower than the width of the elastic separation leg 45 of the assembling pin 31, the elastic separation leg 45 moves while being crushed. By this sliding, the contact surface 23a of the contact portion 23 and the pad 27 are rubbed (wiped), so that the dirt, oxide film, etc. on the contact surface 23a and the pad 27 can be removed.

11A is a perspective view of the assembly completion position, FIG. 11B is a plan view thereof, FIG. 12A is a cross-sectional view taken along the line H-H in FIG. 11, FIG. FIG. 12 is a sectional view taken along the line KK of FIG. 12, and FIG.
As shown in FIGS. 11 and 12, when the connector housing 11 is slid to the assembly position, the assembly pin 31 reaches the assembly completion position of the assembly hole 29 of the printed circuit board 15. Accordingly, the pad 27 slidably contacted with the contact portion 23 is exposed by the sliding distance S of the connector housing 11. At this time, as shown in FIG. 13, since the width W1 of the assembly completion position (locking portion 37) is wider than the width W of the connecting groove 39, the elastic separating leg 45 is restored to the original shape by restoring d outward. Return to.

  Further, since the elastic separating leg 45 does not have a taper 49 on the rear side and has corner portions 51 and 51 instead, the corner portions 51 and 51 are locked to the step portion 41 and do not return to the connecting groove 39. In the assembly pin 31, the shape of the elastic separation leg 45 is restored, so that the locking projection 33 returns to the original position, and the connector housing 11 is fixed to the printed circuit board 15.

  Thus, in the mounting method of the surface mount connector 100, the connector housing 11 is assembled to the printed circuit board 15 by moving. At this time, an assembly process in which the contact portion 23 of the terminal 17 contacts the pad 27 simultaneously with the insertion of the assembly pin 31 and the assembly pin 31 moves is used, and the contact portion 23 is rubbed against the pad 27 by the moving distance. It is done. As a result, the foreign matter on the contact surface 23a and the pad 27 is scraped off.

  Therefore, according to the surface mount connector 100 and the mounting method thereof according to the present embodiment, the assembly pin 31 of the connector housing 11 is inserted into one end of the assembly hole 29 and the other end of the assembly hole 29 is inserted. By moving the connector housing 11 so that the contact portion 23 is moved, the contact portion 23 is rubbed against the pad 27 by the moving distance, so that dirt, oxide film, etc. can be removed without reducing productivity while using the assembly process. The 17 contact surfaces 23a and the pads 27 can be soldered well.

  In the above embodiment, a pair of the assembly holes 29 and the assembly pins 31 are provided, but the number of the assembly holes 29 and the assembly pins 31 is not limited to this. Moreover, the moving direction a of the connector housing 11 is good also considering the opposite direction as a moving direction by making the shape of the assembly hole 29 reverse.

11 Connector housing 15 Printed circuit board (board)
17 Terminal 23 Contacting part 25 Mounting surface 27 Pad 29 Assembly hole 31 Assembly pin 33 Locking projection 35 Insertion part 37 Locking part 39 Connecting groove 41 Step part 45 of locking part and connecting groove Elastic separation leg 49 Taper 51 Corner 100 Surface mount connector a Movement direction W Width of connecting groove

Claims (4)

A surface mount type connector for soldering a contact portion of a terminal derived from a connector housing to a pad provided on a mounting surface of a substrate,
At least a pair of assembly pins suspended from the lower surface of the connector housing and having locking projections;
According to the pair of assembling pins, a pair of parallel elongated holes are formed in the substrate, and an insertion portion is formed at one end in the longitudinal direction to allow the insertion of the locking projection, and the other end is formed at the other end. A mounting hole in which a locking portion for locking the locking projection is formed;
Extends in the moving direction by the distance that the assembling pin contacts the contact portion at the position where the assembling pin is inserted into the assembling hole insertion portion, and the assembling pin is moved to the locking portion. Said pad to
A surface-mounting connector characterized by comprising: The surface mount connector according to claim 1,
The assembly hole is formed by connecting the insertion portion formed in a round hole shape and the locking portion formed in a square hole shape with a connection groove narrower than the insertion portion and the engagement portion. Become
The assembly pin is formed with a pair of elastic separation legs inserted into the insertion portion and narrowed to the width of the connecting groove,
A surface mount type connector characterized in that a taper tapering in the moving direction is formed on the moving side of the elastic separating leg. The surface mount connector according to claim 2,
On the side opposite to the moving direction of the elastic separation leg, a corner is formed that abuts the stepped portion of the locking portion and the connection groove and restricts the elastic separation leg from retreating to the connection groove. A featured surface mount connector. A mounting method of a surface mount type connector in which a contact portion of a terminal derived from a connector housing is soldered to a pad provided on a mounting surface of a substrate,
Inserting at least one pair of assembly pins suspended on the lower surface of the connector housing into one end in the longitudinal direction of the parallel long hole-shaped assembly holes formed in the board;
Mounting the surface mount type connector, wherein the contact housing is rubbed against the pad by the moving distance by moving the connector housing so that the assembly pin becomes the other end of the assembly hole. Method.

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