JP5058882B2 - Surface mount connector - Google Patents

Description

  The present invention relates to a surface mount connector attached to a printed circuit board.

  As the surface mount connector described above, for example, a surface mount connector described in Patent Document 1 has been proposed. FIG. 11 shows a side view of the surface mount connector.

  In FIG. 11, reference numeral 510 denotes a surface mount connector, and reference numeral 560 denotes a printed board on which the surface mount connector 510 is mounted.

  As shown in FIG. 11, the surface mount connector 510 includes a connector housing 512 and a pair of fixing brackets 540 attached to both side surfaces of the connector housing 512.

  The fixing bracket 540 includes a main body plate 541 attached to a side surface of the connector housing 512, and a mounting plate 542 formed by bending at a right angle integrally from the lower edge of the main body plate 541 and overlapping the printed circuit board 560. It is formed in a substantially L shape as a whole. The mounting plate 542 is overlaid on the printed circuit board 560 and fixed by soldering, whereby the surface mount connector 510 is fixed to the printed circuit board 560.

  A plurality of solder entry holes 547 are formed in the mounting plate 542 at regular intervals along the length direction (that is, the left-right direction in FIG. 12). The mounting plate 542 is formed with a plurality of slits 550 that are cut from the protruding edge to the vicinity of the joint of the lower step portion 541C of the main body plate 541. Further, the slit 550A located at the center of the mounting plate 542 is formed on the mounting plate 542 side. Subsequently, the main plate 541 is formed so as to rise from the lower step portion 541C to the lower portion of the middle step portion 541B.

  Solder H is applied to each part to be soldered on the surface of the printed circuit board 560, and the mounting board 542 and a part to which the solder H is applied overlap each other. When the surface mount connector 510 is placed in the position and run in the high temperature furnace, the solder H melts and adheres to the periphery of the mounting plate 542 and enters the solder entry hole 547 and adheres to the periphery. When the solder H is cooled and solidified, the mounting plate 542 is fixed to the surface of the printed circuit board 560, and the surface mount connector 510 is fixed to the printed circuit board 560.

For example, a mating connector (not shown) is fitted to the surface mount connector 510, and an electric wire drawn from the mating connector is pulled, so that the connector housing 512 is indicated by an arrow Z in FIG. When a force is applied, a force to be turned up from one end in the length direction is applied to the mounting plate 542. In this surface mount connector 510, since the mounting plate 542 of the surface mount connector 510 is provided with a plurality of slits 550, the turning-up force is divided for each position of the slit 550, so that the mounting plate 542 is temporarily installed. Even if it turned over, I was able to prevent it from turning up to the end.
JP 2005-302523 A

  However, since the above-described surface mount connector 510 only has its mounting plate 542 fixed to the surface of the printed circuit board 560 by soldering, the printed circuit board is more in comparison with a surface mount connector reinforced using a reinforcing member or the like. There was the problem that it was inferior in the strength which resists peeling from. Moreover, although the above-mentioned intensity | strength can be improved by fixing together with a reinforcement member, since the assembly process for attaching a reinforcement member increases, there existed a problem that cost increased.

  The present invention aims to solve the above problems. That is, an object of the present invention is to provide a surface mount connector capable of improving strength against peeling from a printed circuit board while suppressing an increase in assembly process.

  In order to achieve the above-mentioned object, the invention described in claim 1 is a fixed device having a connector housing, a main body portion attached to the connector housing, and a flat plate-like attachment portion bent from one end of the main body portion. In a surface mount connector that is fixed to the printed circuit board by being overlaid on the surface of the printed circuit board and soldered, the through hole provided in the mounting section, and a plan view Reinforcement made of a synthetic resin having a base formed with an area larger than the through-hole and overlaid on the mounting portion, and a projecting portion that protrudes from the base and is integrally formed and the tip passes through the through-hole and melts into the solder A surface-mount connector characterized by comprising a member.

  The invention described in claim 2 is the invention described in claim 1, wherein the attachment portion has a groove portion formed along a planar view shape of the base portion of the reinforcing member, and the through hole is formed. And is provided in the groove.

  According to the first aspect of the present invention, the through hole provided in the mounting portion of the fixing bracket, the base portion having a plan view area larger than the through hole and overlaid on the mounting portion, and protruding from the base portion And a reinforcing member made of a synthetic resin having a protruding portion that is integrally formed and passes through the through hole and the tip melts into the solder, so that the base portion and the fixing conductor pattern via the protruding portion passed through the through hole The upper solder is connected to hold the mounting portion between the base portion and the fixing conductor pattern. In addition, the tip of the protruding portion of the reinforcing member is melted into the solder, that is, it is made of a synthetic resin that melts in the same manner as the solder at a temperature at which the solder melts. When the solder is arranged so as to be in contact with the molten solder and a temperature for bringing the solder into a molten state is applied, the tip is melted into the solder by the temperature.

  According to the second aspect of the present invention, the attachment portion has the groove portion formed along the shape of the base portion of the reinforcing member in plan view, and the through hole is provided in the groove portion. When the reinforcing member is disposed in the groove, the reinforcing member is fitted into the groove, and when the temperature at which the solder melts is applied, the reinforcing member is melted in the groove.

  As described above, according to the invention described in claim 1, the base of the reinforcing member and the solder on the fixing conductor pattern are connected via the protrusion of the reinforcing member, and the base and the fixing conductor pattern are connected to each other. Since the attachment portion can be held between the two, the strength for fixing the attachment portion and the fixing conductor pattern can be reinforced by providing this reinforcing member. Further, after the tip of the protrusion of the reinforcing member is arranged so as to be in contact with the solder in a non-molten state, when a temperature for melting the solder is applied, the tip melts into the solder due to the temperature, so a separate work process is provided. Without this, the base of the reinforcing member and the solder on the fixing conductor pattern can be connected. Therefore, the strength against peeling from the printed circuit board can be improved while suppressing an increase in the assembly process.

  According to the second aspect of the present invention, since the reinforcing member is fitted into the groove portion and then melted in the groove portion, the reinforcing member can be brought into close contact with the attaching portion, and the attaching portion is more firmly fixed. It can be fixed to the conductor pattern for use.

  Hereinafter, a surface mount connector showing an embodiment of the present invention will be described with reference to FIGS.

  A surface mount connector 1 of the present invention shown in FIG. 1 is soldered and fixed to a printed circuit board 6 shown in FIG. This printed circuit board 6 is a printed circuit board having a well-known configuration in which a plurality of conductor patterns are provided on a plane of a substrate made of an insulating synthetic resin. A surface 6A (referred to as an upper surface in FIG. 1) of the printed circuit board 6 has a plurality of terminal conductor patterns 64 to which a plurality of terminals 3 included in a surface mount connector 1 to be described later are soldered, and surface mounting. A pair of fixing conductor patterns 62 formed in a rectangular shape to which a pair of fixing metal fittings 4 included in the connector 1 are soldered are provided.

  As shown in FIG. 1, the surface mount connector 1 includes a plurality of terminals 3, a connector housing 2 that accommodates the plurality of terminals 3, a pair of fixing brackets 4 attached to the connector housing 2, and a pair of fixings. And a reinforcing member 46 attached to each of the metal fittings 4.

  The plurality of terminals 3 are formed by bending a rod-shaped metal member, and two portions extending linearly in opposite directions along the fitting direction E of the mating connector to the connector housing 2; It has a crank shape having a portion extending linearly along the thickness direction of the printed circuit board 6 connecting these two portions. Further, the one end portion 32 of the terminal 3 is overlapped with a terminal conductor pattern 64 provided on the surface 6A of the printed circuit board 6, and is electrically connected by solder. The other end 31 of the terminal 3 is connected to a terminal of a mating connector (not shown). The fitting direction E is a direction in which the mating connector is contacted and separated, and is a direction parallel to the surface of the printed circuit board 6. The plurality of terminals 3 are arranged at intervals from each other along a direction orthogonal to the fitting direction E.

  The connector housing 2 is formed in a box shape by a plurality of outer walls made of insulating synthetic resin. Of the plurality of outer walls, a plate-like outer wall that is superimposed on the surface 6A of the printed circuit board 6 is referred to as a bottom wall 22. In addition, a plate-like outer wall provided in parallel with the bottom wall 22 at a distance is referred to as an upper wall 21. A pair of plate-like outer walls connecting the ends of the bottom wall 22 and the top wall 21 are referred to as side walls 23 and 24. The pair of side walls 23 and 24 are provided perpendicular to the surface 6A of the printed circuit board 6 and are spaced from each other along the arrangement direction of the plurality of terminals 3.

  And the connector housing 2 is the other side along the fitting direction E from the opening part 20 enclosed by the one end part along the fitting direction E of each of the upper wall 21, the bottom wall 22, the side wall 23, and the side wall 24. The connector is inserted.

  Further, the connector housing 2 has, as the outer wall, the other end portions along the fitting direction E of the upper wall 21, the bottom wall 22, the side wall 23, and the side wall 24, that is, the other end portions separated from the opening portion 20, It further has a back wall connecting the two. The back wall supports the vicinity of the bent portions of the plurality of terminals 3 described above.

  Further, the pair of side walls 23 and 24 has the following configuration in detail. That is, the pair of side walls 23 and 24 includes a plate-like side wall main body 7 in which the ends of the bottom wall 22 and the upper wall 21 are connected to each other, a pair of fixing metal mounting walls 8 provided outside the side wall main body 7, It consists of The pair of fixing bracket mounting walls 8 are provided at intervals along the fitting direction E, and each has a gap for sandwiching the end 41 a of the fixing bracket 4 between the side wall body 7. It is provided. Such a pair of side walls 23, 24 attaches a fixture 4, which will be described later, to the connector housing 2. In FIG. 1, the side wall body 7 and the fixing bracket mounting wall 8 on the side wall 23 side are hidden, but the side wall 23 has the same configuration as the side wall 24 side.

  A pair of fixing brackets 4 is attached to each of the pair of side walls 23 and 24 described above. As shown in FIGS. 2 and 3, the fixing bracket 4 is formed by bending a single metal plate, and a plate-like main body 41 attached to the side walls 23 and 24 and soldering. And an attachment portion 42 fixed to the printed circuit board 6.

  The main body 41 is provided in a substantially rectangular shape, and is attached to the side walls 23 and 24 by being overlapped with the side wall main body 7 and having both end portions 41a fitted into the gap between the side wall main body 7 and the fixing bracket mounting wall 8. It is done.

  The attachment portion 42 is connected to the lower end portion of the main body portion 41 on the printed circuit board 6 side, and is formed in a rectangular shape extending in a direction orthogonal to the plane of the main body portion 41. The attachment portion 42 is formed in a rectangular shape that is slightly smaller than the fixing conductor pattern 62 provided on the surface 6A of the printed circuit board 6, and is superposed on the fixing conductor pattern 62 and soldered. The mounting portion 42 has a circular hole 45 provided in the vicinity of the center thereof, and a surface 42A of the mounting portion 42 (refers to a surface located on the upper side in FIG. 3) so as to surround the hole 45. And an annular groove 43 provided by being dug down in the thickness direction. Furthermore, a plurality of through holes 44 are formed in the groove portion 43 at equal intervals so as to penetrate the attachment portion 42 in a columnar shape. The arrangement position and shape of the groove 43 and the shape, number and interval of the through holes are appropriately determined according to the configuration of the surface mount connector 1 and the like.

  The reinforcing member 46 is made of a synthetic resin that melts in the same manner as the solder at a temperature at which the solder melts. As shown in FIG. 4, a base portion 46 a formed in a flat plate shape along the planar view shape of the groove 43. And a plurality of columnar protrusions 46b that are formed integrally with the base 46a and are erected vertically from one surface of the base 46a. The plurality of protrusions 46 b are formed in the same number and the same interval as the plurality of through holes 44 and in a shape that can be inserted into the through holes 44. Further, the protrusion 46 b has a height that is substantially the same as the thickness of the mounting portion 42 in the groove 43. That is, the reinforcing member 46 is fitted into the groove portion 43 so that one surface provided with the protruding portion 46b faces the groove portion 43, so that the plurality of protruding portions 46b are respectively inserted into the corresponding through holes 44. The leading end 46c of the protruding portion 46b is positioned at the same height as the back surface 42B of the mounting portion 42 (referred to as a lower surface in FIG. 3).

  As shown in FIG. 1, the surface mount connector 1 having the above-described configuration is fixed on the surface 6 </ b> A of the printed circuit board 6 by being soldered so that the mounting portion 42 overlaps the fixing conductor pattern 62. Further, as shown in FIG. 2, the reinforcing member 46 is fitted in the groove portion 43 provided in the mounting portion 42, and the plurality of protruding portions 46 b of the reinforcing member 46 are inserted into the plurality of through holes 44 in the groove portion 43. At the same time, the tip 46c of the protrusion 46b is melted into the solder H on the fixing conductor pattern 62. Therefore, the base 46a and the fixing conductor pattern 62 connected to each other via the plurality of protrusions 46b are The mounting portion 42 is sandwiched and fixed on the surface 6A of the printed circuit board 6.

  Next, a procedure for assembling the surface mount connector 1 and the printed board 6 described above will be described with reference to FIGS.

  FIG. 5 is a perspective view showing a state before the surface mount connector 1 is attached to the printed circuit board 6. FIG. 6 is a cross-sectional view showing the positional relationship among the printed circuit board 6, the fixing bracket 4, and the reinforcing member 46 in the state shown in FIG. 5. FIG. 7 is a perspective view showing a state after the surface mount connector 1 is attached to the printed circuit board 6. FIG. 8 is a cross-sectional view showing the positional relationship among the printed circuit board 6, the fixing bracket 4, and the reinforcing member 46 in the state of FIG. 7.

  First, in the state shown in FIGS. 5 and 6, cream-like solder (not shown) is applied to each of the fixing conductor pattern 62 and the terminal conductor pattern 64 of the printed circuit board 6 by an assembly device (not shown). . Then, the surface mount connector 1 is positioned above the printed circuit board 6 so that the mounting portion 42 of the fixing metal fitting 4 overlaps the fixing conductor pattern 62 on the surface 6A of the printed circuit board 6. And the some through-hole 44 provided in the groove part 43 of the attaching part 42 and the some protrusion part 46b of the reinforcement member 46 corresponding to each of these some through-hole 44 are arrange | positioned on the same straight line. The reinforcing member is positioned above the attachment portion 42. After that, the surface mount connector 1 is placed on the surface 6A of the printed circuit board 6 so that the mounting portion 42 overlaps the fixing conductor pattern 62, and the reinforcing member 46 inserts the protruding portion 46b into the through hole 44. And fitted into the groove 43. In FIGS. 5 and 6, the fixing bracket 4 and the reinforcing member 46 attached to the side wall 23 are the same as those attached to the side wall 24, and thus the description thereof is omitted.

  When the reinforcing member 46 is fitted in the groove 43, the tip 46 c of the protruding portion 46 b of the reinforcing member 46 comes into contact with the unmelted solder applied on the fixing conductor pattern 62. In this state, when traveling in a high temperature furnace (not shown), the above-described solder is melted by the temperature in the high temperature furnace, and the tip 46c of the protruding portion 46b in contact with the solder is melted into the solder. The base portion 46 a of the reinforcing member 46 is melted and is in close contact with the groove portion 43. Then, when the solder is taken out from the high-temperature furnace and the solder is cooled and solidified, the mounting portion 42 and the fixing conductor pattern 62 are fixed to each other by the solder as shown in FIGS. As shown schematically, the tip 46c of the protrusion 46b is solidified in a state of being melted in the solder H, that is, the base 46a and the fixing conductor pattern 62 are connected via the protrusion 46b. The attachment part 42 is pinched and fixed.

  As described above, the surface mount connector 1 of the present invention includes a through hole 44 provided in the attachment portion 42 of the fixing bracket 4 and a base portion 46a that is formed in a plan view area larger than the through hole 44 and overlaps the attachment portion 42. And a reinforcing member 46 made of a synthetic resin that has a protruding portion 46b that protrudes from the base portion 46a and is integrally formed and passes through the through hole 44 and the tip 46c melts into the solder, and is passed through the through hole 44. The base portion 46 a and the solder on the fixing conductor pattern 62 are connected via the protruding portion 46 b, and the attachment portion 42 is sandwiched between the base portion 46 a and the fixing conductor pattern 62. Further, the tip 46c of the protruding portion 46b of the reinforcing member 46 is melted into the solder, that is, the protruding portion of the reinforcing member 46 is made of a synthetic resin that melts in the same manner as the solder at a temperature at which the solder melts. After the tip 46c of 46b is placed in contact with the unmelted solder, a temperature for bringing the solder into a molten state is applied, and the tip 46c melts into the solder due to the temperature.

  Further, since the attachment portion 42 has the groove portion 43 formed along the planar view shape of the base portion 46 a of the reinforcing member 46 and the through hole 44 is provided in the groove portion 43, the reinforcement member 46 is used as the attachment portion 42. When disposing, the reinforcing member 46 is fitted into the groove 43, and the reinforcing member 46 is melted in the groove 43 when a temperature at which the solder melts is applied.

  As described above, according to the present invention, the base portion 46 a of the reinforcing member 46 and the solder on the fixing conductor pattern 62 are connected via the protruding portion 46 b of the reinforcing member 46, and the base portion 46 a and the fixing conductor pattern 62 are connected to each other. Since the attachment portion 42 can be held between them, the strength for fixing the attachment portion 42 and the fixing conductor pattern 62 can be reinforced by providing the reinforcing member 46. Further, after the tip 46c of the protruding portion 46b of the reinforcing member 46 is disposed so as to contact the unmelted solder, when the temperature at which the solder is melted is applied, the tip 46c is melted into the solder by that temperature. The base 46a of the reinforcing member 46 and the solder on the fixing conductor pattern 62 can be connected without providing a work process. Therefore, it is possible to improve the strength against the surface mount connector 1 being peeled from the printed circuit board 6 while suppressing an increase in cost due to an increase in the assembly process.

  Further, since the reinforcing member 46 is fitted into the groove portion 43 and then melted in the groove portion 43, the reinforcing member 46 can be brought into close contact with the attachment portion 42, and the attachment portion 42 is more firmly attached to the fixing conductor pattern 62. Can be fixed to.

  In the present embodiment, as shown in FIG. 1, an annular groove 43 is provided in the mounting portion 42, and a reinforcing member 46 in which a base 46 a is formed in an annular shape so as to be fitted into the groove 43 is used. However, the present invention is not limited to this, and the presence or absence of the groove portion in the attachment portion 42 is arbitrary, and the shape of the reinforcing member is arbitrary if the shape of the base portion in plan view is larger than the through hole 44. For example, as shown in FIGS. 9 and 10, a pair of through holes 44 are provided at a predetermined interval in the mounting portion 42 without providing a groove portion, and the rectangular base portion 47 a and the base portion 47 a are integrally formed and penetrated. You may use the reinforcement member 47 provided with the protrusion part 46b penetrated by each of the hole 44. FIG. Similar to the reinforcing member 46 described above, the reinforcing member 47 includes a plurality of protruding portions 47b that are integrally formed by protruding from one surface of the base portion 47a. As shown in FIG. The tip 47 c is melted into the solder H on the fixing conductor pattern 62.

  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.

It is a perspective view which shows the surface mount connector which is one Embodiment of this invention. It is an expanded sectional view which shows typically the cross section along the AA in FIG. It is an expansion perspective view of the fixing metal fitting of FIG. It is an expansion perspective view of the reinforcing member of FIG. It is a perspective view which shows the state before attaching a surface mount connector to a printed circuit board. It is sectional drawing along the BB line in FIG. It is a perspective view which shows the state after attaching the surface mount connector to a printed circuit board. It is sectional drawing along CC line in FIG. It is a perspective view which shows the modification of a reinforcement member. FIG. 10 is an enlarged cross-sectional view schematically showing a cross section taken along line DD in FIG. 9. It is a side view which shows the conventional surface mount connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface mount connector 2 Connector housing 4 Fixing metal fitting 6 Printed circuit board 6A The surface of a printed circuit board 41 Main body part 42 Mounting part 43 Groove part 44 Through hole 46 Reinforcement member 46a Base part 46b Projection part 46c Projection end 62 Fixed conductor pattern

Claims (2)

A connector housing; and a fixing member having a main body portion attached to the connector housing and a flat plate-like attachment portion formed by bending from one end of the main body portion, and the attachment portion is superimposed on the surface of the printed circuit board. In the surface mount connector fixed to the printed circuit board by being soldered,
A through hole provided in the mounting portion;
From a synthetic resin having a base formed in a plan view area larger than the through-hole and overlaid on the mounting portion, and a protrusion that is integrally formed protruding from the base and the tip passes through the through-hole and melts into the solder And a reinforcing member, and a surface mount connector. The mounting portion has a groove formed along the shape of the base of the reinforcing member in plan view;
The surface mount connector according to claim 1, wherein the through hole is provided in the groove.

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