JPH087952A - Connector for surface mounting - Google Patents

Abstract

PURPOSE:To apply slodering to a connecting terminal surface at a stable strength, by providing a slider, a housing stopper, and a clip, and bringing a contact tail into contact with the connecting terminal surface of a circuit pattern. CONSTITUTION:In order to place a slider 35 in a housing 32, a slider 36 is inserted to the near side of the horizontal part 341 of a reverse L-shaped insertion hole 34 of the housing 32. After that, an MST connector 31 for surface mounting is inserted to a printed circuit board 15 in the lateral direction, and it is held by a clip 13. And when the sash bar 38 of the slider 35 is pushed in to the inner side of the circuit board 15 so as to move the slider 35 to the position of an upward vertical member 342, the housing 32 is dropped to the level that the lower end face of a side surface 33 is contacted to the surface of the circuit board 15. As a result, the contact tail 6 of the connector 31 is contacted to a connecting terminal surface 5 where the paste solder 7 of the circuit pattern of the circuit board 15 is applied. Consequently, the solder 7 is never scraped because the upper part of the contact tail 6 is contacted to the terminal surface 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for surface mounting (hereinafter referred to as S
It is referred to as an MT connector).

[0002]

2. Description of the Related Art An example of a conventional SMT connector is shown in FIG. 11. In this conventional SMT connector 1, a plurality of contacts 3 are housed in a housing 2, and one end of the contact 3 is a printed circuit board 4. A contact tail 6 having a spring property that contacts the connection terminal surface 5 of the circuit pattern is formed. The contact 3 may have any shape as long as the contact tail 6 can be soldered to the connection terminal surface 5 of the circuit pattern of the printed circuit board 4. The connection terminal surface 5 of the printed circuit board 4 is coated with paste solder 7 and is ready for soldering. At the other end of the contact 3, the contact 3 is fixed in the housing 2 and a contact insertion hole 8 into which a contact of a mating connector (not shown) is inserted is provided.
Further, lock pins 9 for temporarily fixing the SMT connector 1 to the printed circuit board 4 are fixed to both sides of the housing 2 by press fitting or the like into a guide portion 10 of the housing 2.
The lock pin 9 is formed in a bifurcated shape so as to fit into the lock pin insertion hole 11 of the printed circuit board 4, and has a locking portion 12 having an inwardly contracting spring property. When the locking portion 12 is press-fitted into the lock pin insertion hole 11 and the connector 1 is temporarily fixed to the printed board 4, the contact tail 6 comes into contact with the connection terminal surface 5 of the printed board 4. After that, it is automatically or manually soldered to the printed circuit board. The lock pin insertion hole 11 is conventionally formed with a diameter of about 2.3 mm. As a means for temporarily fixing the connector 1 to the printed circuit board 4, there is a method of using a screw (not shown) or the like in addition to the lock pin. Since heat resistance is required as the material of the housing 2, liquid crystal polymer (L
CP), polyamide resin (PA), and polyphenylene sulfide resin (PPS) are used. Further, as the material of the contact 3, the contact tail 6 is required to have a spring property, and therefore, phosphor bronze or beryllium copper having a spring property is generally used.

[0003]

One advantage of the use of the SMT connector is that the contact tail 6 can be soldered to the surface of the printed circuit board 4 as described above, which is of the conventional solder dip type. By making holes in the printed circuit board 4 like the ones as described above, the surface of the printed circuit board and the wiring pattern provided inside the multilayer printed circuit board are not damaged. However,
As described above, the provision of the lock pin insertion hole 11 for temporarily fixing the SMT connector 1 to the printed circuit board 4 has a problem that the advantage of the bending angle of the SMT connector 1 cannot be utilized. Therefore, as a method of temporarily fixing the SMT connector 1 without making a hole in the printed circuit board 4, as shown in FIG.
2 and a method of temporarily fixing using a clip having a spring property as shown in FIG. 13 has been proposed.

That is, the housing 2 of the SMT connector 21
Clip 1 on the surface where the contact insertion hole 8 is provided
Equipped with 3. The SMT connector 21 is inserted into the printed circuit board 15 from the lateral direction so that the printed circuit board 15 is sandwiched between the bottom surface of the housing 22 and the clip 13.
4 is a temporary fixing method of sandwiching. But,
As is apparent from the side view of FIG. 13A, this temporary fixing method is such that when the SMT connector 21 is inserted into the printed circuit board 15, the tip of the contact tail 6 comes into contact with the surface of the printed circuit board 15 by the spring property. Inserted in. Therefore, as shown in FIG. 13B, the tip of the contact tail 6 scrapes off the paste solder 7 applied to the connection terminal surface 5 of the printed circuit board 15 or causes the so-called Russell to be moved forward. It will be. Therefore, when automatic soldering or manual soldering is used, soldering cannot be performed or soldering is insufficient, so fillet manufacturing is performed to increase soldering strength. It becomes impossible to do so. Therefore, the soldering strength is weakened, and a slight vibration may cause the soldering to separate, resulting in poor contact. An object of the present invention is to provide an SMT connector that does not have a mounting hole for temporarily fixing the SMT connector on the printed circuit board and does not scrape off the paste solder 7 of the printed circuit board when mounting the SMT connector. To do.

[0005]

The present invention has been made in consideration of the above problems, and four means for solving the problems will be described below. According to the first means of the present invention, the contact has a contact tail portion having a spring property for contacting the connection terminal surface of the circuit pattern of the printed circuit board. The housing has a plurality of contact fixing holes and a contact insertion hole into which a contact of a mating connector is inserted. In the surface-mounting connector composed of these, the housing of the connector has side walls provided with L-shaped insertion holes corresponding to each other on both sides of the lower surface. The slider has a slide portion that slides in the horizontal portion of the L-shaped insertion hole of the both side walls and is inserted so as to be dropped into the upward vertical portion thereof.
And a crosspiece which is provided integrally with the slide portion and slides on the surface of the printed circuit board. Further, the housing has a housing stopper provided on the contact insertion hole side of the housing for positioning with respect to the printed circuit board of the housing, and a contact insertion hole side of the housing for temporarily fixing the housing to the printed circuit board. And a clip provided on the. After the housing is temporarily fixed to the end surface of the printed circuit board with a clip in a state where the housing is floated from the printed circuit board, the slide portion of the slider is attached to the L of the housing.
The contact tail is brought into contact with the connection terminal surface of the circuit pattern by sliding it in the horizontal portion of the letter-shaped insertion hole and dropping it into the upward vertical portion of the L-shaped insertion hole. An embodiment of the first means will be shown below. (1) The U-shaped clip is provided with a lower surface of the housing and a clamping portion having a spring property for clamping the printed circuit board with the clip. (2) The L-shaped insertion hole of the housing is provided with a protrusion on the horizontal portion on the upward vertical portion side so that the sliding portion of the slider does not fall into the upward vertical portion of the housing during insertion. Has been. (3) The housing is temporarily fixed to the end surface of the printed circuit board by a clip, and then the slider is pushed so that the sliding portion of the slider falls from the horizontal portion of the housing to the upward vertical portion. (4) The level difference between the L-shaped horizontal portion and the upward vertical portion provided on both side walls of the housing is such that at least the contact tail does not contact the end face of the paste solder of the printed circuit board when the SMT connector is inserted into the printed circuit board. I decided.

In the second means of the present invention, the contact has a contact tail portion having a spring property for contacting the connection terminal surface of the circuit pattern of the printed circuit board. The housing has a plurality of contact fixing holes and a contact insertion hole into which a contact of a mating connector is inserted. In the surface-mounting connector composed of these, the housing of the connector has side walls provided with L-shaped insertion holes corresponding to each other on both sides of the lower surface. The slider has a slide portion that slides in the horizontal portion of the L-shaped insertion hole of the both side walls and is inserted so as to be dropped in the upward vertical portion, and is provided integrally with the slide portion. And a cross section that slides on the surface of the printed circuit board. In addition, a stopper portion for positioning the printed circuit board is provided. Further, the housing is provided with a clip provided on the contact insertion hole side of the housing for temporarily fixing to the printed circuit board. After the housing is temporarily fixed to the end surface of the printed circuit board by a clip, the housing is slid inside the printed circuit board in a state where the housing is floated above the printed circuit board, so that the L-shaped insertion hole of the housing is formed. After the horizontal part is moved with respect to the slide part of the slider, the vertical part of the through hole is dropped to bring the contact tail into contact with the connection terminal surface of the circuit pattern.
An embodiment of the second means will be shown below. (1) The U-shaped clip is provided with a lower surface of the housing and a clamping portion having a spring property for clamping the printed circuit board with the clip. (2) The L-shaped insertion hole of the housing is provided with a protrusion on the horizontal portion on the upward vertical portion side so that the sliding portion of the slider does not fall into the upward vertical portion of the housing during insertion. Has been. (3) The housing is temporarily fixed to the end surface of the printed circuit board with a clip, and then the housing is pushed so that the sliding portion of the slider falls from the horizontal portion of the housing to the upward vertical portion. (4) The level difference between the L-shaped horizontal portion and the upward vertical portion provided on both side walls of the housing is such that at least the contact tail does not contact the end face of the paste solder of the printed circuit board when the SMT connector is inserted into the printed circuit board. I decided.

In the third means of the present invention, the contact has a contact tail portion having a spring property for coming into contact with the connection terminal surface of the circuit pattern of the printed circuit board. The housing has a plurality of contact fixing holes and a contact insertion hole into which a contact of a mating connector is inserted. In a surface-mounting connector composed of these, a housing of the connector has a heat-melting convex portion of a thermoplastic resin provided on a lower surface, and a contact insertion hole of the housing for temporarily fixing the housing to a printed circuit board. And a clip provided on the side. The heat when soldering the contact tail to the connection terminal surface of the circuit pattern together with the components mounted on the printed circuit board with the housing floating above the printed circuit board melts the thermoplastic resin of the heat-melting convex portion. The contact tail is brought into contact with the connection terminal surface of the circuit pattern. An embodiment of the third means will be shown below. (1) The U-shaped clip is provided with a lower surface of the housing and a clamping portion having a spring property for clamping the printed circuit board with the clip. (2) The heat-melting convex portion provided on the lower surface of the housing is SM
When the T connector was inserted into the printed circuit board, at least the contact tail was sized not to come into contact with the end surface of the paste solder of the printed circuit board.

According to a fourth aspect of the present invention, the contact has a contact tail portion having a spring property for contacting the connection terminal surface of the circuit pattern of the printed circuit board. The housing has a plurality of contact fixing holes and a contact insertion hole into which a contact of a mating connector is inserted. In a surface-mounting connector composed of these, when the contact tail is aligned with the connection terminal surface of a circuit pattern of the printed circuit board on the housing of the connector, the connector is mounted on the lower surface of the contact tail installation side. A clip provided on a contact insertion side of the housing for temporarily fixing the housing to the printed circuit board, the projecting part having a size that allows the housing to float above the printed circuit board, and the projection being inserted into the recessed part provided on the printed circuit board; It is equipped with. Fourth below
3 shows an embodiment of the means. (1) The U-shaped clip is provided with a lower surface of the housing and a clamping portion having a spring property for clamping the printed circuit board with the clip. (2) The convex portion provided on the lower surface of the housing is sized so that at least the contact tail does not come into contact with the end surface of the paste solder of the printed circuit board when the SMT connector is inserted into the printed circuit board. (3) The positional relationship between the convex portion provided on the lower surface of the housing and the concave portion provided on the printed circuit board into which the convex portion is fitted is such that when the convex portion is fitted into the concave portion, the contact tail is I made contact with the paste solder from above.

[0009]

The function of the present invention is that the contact tail of the SMT connector is attached to the printed circuit board by using a slider or a protrusion provided on the lower surface of the housing when the SMT connector is laterally inserted for temporary fixing with a clip. Is inserted so as not to contact the surface of the printed circuit board.
When the contact tail is located on the connecting terminal surface of the circuit pattern of the printed circuit board, the contact tail is made by sliding the slider slide part from the L-shaped horizontal part of the housing to the upward vertical part, or by using a thermoplastic resin. Easily contact the printed circuit board connection terminal surface without scraping off the paste solder on the connection terminal surface by melting the formed projections or fitting the projections on the lower surface of the housing into the recesses of the printed circuit board. To do.

[0010]

Embodiments First to fourth embodiments of the present invention will be described below with reference to the drawings. The main component of the invention is the housing contact clip. The clip 13 used in all the examples is the holding portion 1 of this clip 13 when the SMT connector is temporarily fixed to the printed circuit board.
4 and the lower surface of the housing sandwich the printed circuit board.
Therefore, the clip portion 14 of the clip 13 is required to have a spring property. The material of the clip 13 may be metal or plastic as long as the holding portion 14 has a spring property. The clip 13 is press-fitted into the housing. The metal material may be copper alloy or stainless steel, and the plastic material may be polyamide (PA) resin. Considering the durability of the clip 13, a metal material is recommended, and a thickness of 0.5 mm is sufficient. The materials of the housing and the contacts are the same as those described in the conventional example. In this example, the housing is PPS and the contacts are phosphor bronze. The size of the SMT connector in the width direction varies depending on the contact pitch and the number of cores. The contact pitch of the present invention is 0.5, 0.8, 1.0, 1.2.
It can handle various types such as 7, 2.54 mm, etc., and can also support various numbers of cores. In the case of the embodiment of the present invention, the contact pitch is 2.54 mm, the number of cores is 4, and the size in the width direction is about 28 mm. In this case, the size in the depth direction and the height direction is about 10.7 mm. The depth and height dimensions can be accommodated in some cases.

A first embodiment of the present invention will be described with reference to FIGS. The same parts as those in the conventional example of FIGS. 11 to 13 described above are denoted by the same reference numerals, and description thereof will be omitted.
In FIGS. 1 and 2, reference numeral 31 denotes an SMT connector, and side walls 33 are provided on both sides of a lower surface of a housing 32 thereof. Both side walls 33 have an inverted F shape in which two inverted L-shapes are connected.
A letter-shaped insertion hole 34 is provided. That is, the insertion hole 3
4 is a state in which two inverted L-shapes of the horizontal portion 341 and the upward vertical portion 342 are connected. In addition, this insertion hole 3
When viewed from the opposite side of the housing 32, 4 can be seen as L-shaped or F-shaped.

Reference numeral 35 is a cross-shaped slider, and two slide members 37 each having a slide portion 36 that fits on both sides of the insertion hole 34 provided on both side walls 33 of the housing 32 are two crosspieces. It is fixed by 38. The slide member 37 is made of a material having a spring property such as resin so that it can be fitted into the insertion hole 34. As the material of the slider, the same material as the housing described in the conventional example can be considered, and PPS is used in this embodiment. Further, if the portions of the both side walls 33 also have a slight spring property, the insertion into the insertion hole 34 becomes easier. Also, the slide member 3
It is necessary to provide a step on the slide portion 36 fitted into the insertion hole 34 so as not to remove 7 from the insertion hole 34, and to provide a stopper function on the crosspiece portion 38. The cross-sectional shape of the slide portion 36 of the slide member 37 does not have to be rectangular, and may be circular or other angular shape. Reference numeral 39 denotes a housing stopper provided on the housing 32. By bringing the housing stopper 39 into contact with the end surface of the printed circuit board 15,
The contact tail 6 provided at the position is aligned with the position of the connection terminal surface 5 of the printed board 15 in the depth direction.

Next, the mounting condition of the SMT connector 31 on the printed board 15 in the first embodiment will be described. FIG. 1A is a front view and a side view of a mounting preparation state, FIG. 1B is a front view and a side view of the mounting state, and FIG. 2A is a perspective view of the SMT connector 31 before the slider 35 is assembled. 2 (b) is a perspective view of the slider 35, and FIG. 2 (c).
FIG. 6 is an enlarged view of an insertion hole 34 provided in a side wall 33 of the housing 32. First, the slider 35 is attached to the housing 32.
The slide part 36 for housing 32
The inverted L-shaped insertion hole 34 is inserted into the front side (the left side in FIG. 1A) of the horizontal portion 341. Then the SMT
Insert the connector 31 into the printed circuit board 15 from the lateral direction,
The clip 13 provided in the housing 32 holds the clip. In this state, the position of the inverted L-shaped insertion hole 34 and the height of the slide portion 36 of the slider 35 are appropriately determined so that the contact tail of the SMT connector 31 floats above the surface of the printed circuit board 15. It is to be noted that the slide portion 36 fitted in the horizontal portion 341 of the inverted L-shaped insertion hole 34 of the housing 32 is prevented from being dropped into the upward vertical portion 342 of the insertion hole 34 by a slight vibration or the like. As shown in (c), a protrusion 343 is provided near the rising vertical portion 342 of the horizontal portion 341.

Next, the bar portion 38 of the slider 35 is pushed inward in the printed circuit board 15 (from the front side to the rear side in the drawing) to move the slide portion 36, and the slide portion 36 has a projection 343 of the inverted L-shaped insertion hole 34. When the vehicle moves over and moves to the position of the upward vertical portion 342, the slide portion 36 falls into the upward vertical portion 342. That is, the housing 32 falls to the extent that the lower end surface of the side wall 33 contacts the surface of the printed board 15, and the contact tail 6 of the SMT connector 31 is coated with the paste solder 7 of the circuit pattern of the printed board 15. It comes into contact with the connection terminal surface 5. Therefore, the contact tail 6 contacts the connection terminal surface 5 of the printed circuit board 15 from above,
The paste solder 7 applied to the connection terminal surface 5 is not scraped off. The dimension (h1) between the lower end surface of the side wall 33 of the housing 32 shown in FIG. 2A and the upper end surface of the upward vertical portion 342 of the insertion hole 34, and the slider 35 shown in FIG. The relationship with the dimension (h2) from the lower surface of the cross section 38 to the upper surface of the slide section 36 is preferably the same or h1 is slightly larger than h2.

FIG. 3 shows a modification of the slider 35 shown in FIG. 2B, in which the two slide members 37 are formed by the plate-shaped portion 3.
It is connected by 71 and is integrally molded. Further, the front surface of the crosspiece 38 is enlarged so that the slider can be easily pushed. In addition, in this embodiment, the L-shaped insertion hole 34 provided in the side wall 33 of the housing 32 has an inverted F-shape in which two L-shapes are connected, but the two L-shapes are separated. Alternatively, one inverted L-shape and one slide member 37 may be combined in consideration of the position where the inverted L-shape is provided.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on. Note that the same parts as those of the conventional example of FIGS. In FIG. 4 and FIG. 5, reference numeral 41 denotes an SMT connector, and side walls 43 are provided on both sides of the lower surface of the housing 42, and both side walls 43 have an F-shaped insertion hole 44 connecting two L-shaped shapes. It is provided. That is, the insertion hole 44 is in a state in which two L-shaped portions of the horizontal portion 441 and the upward vertical portion 442 are connected. In addition, this insertion hole 4
When viewed from the opposite side of the housing 42, it can be seen as an inverted L-shape or an inverted F-shape. Reference numeral 45 is a cross-shaped slider, which is a side wall 43 of the housing 42.
Two slide members 47 each having a slide portion 46 fitted on both sides thereof are fixed to the insertion hole 44 provided in the above by two crosspieces 48. The slide member 47
Is made of a material having a spring property such as resin so that it can be fitted into the insertion hole 44. Further, if the side walls 43 also have a slight spring property, the insertion into the insertion hole 44 becomes easier.

Further, the slide portion 4 fitted into the insertion hole 44 so that the slide member 47 does not come off from the insertion hole 44.
It is necessary to provide a step on 6 and a stopper function on the crosspiece 48. The slide member 4
The cross-sectional shape of the slide portion 46 of No. 7 may be various shapes as in the first embodiment. 49 is the slider 4
The slider stopper provided on the front side of the cross section 48 of the No. 5 contacts the front end surface of the printed circuit board 15 to position the slider 45. This positioning is
Positioning is performed so that the contact tail 6 of the SMT connector 41 is indirectly arranged on the connection terminal surface 5 of the printed circuit board 15.

Next, the mounting condition of the SMT connector 41 on the printed circuit board 15 in the second embodiment will be described. 4A is a front view and a side view of a mounting preparation state, FIG. 4B is a front view and a side view of the mounting state, and FIG. 5A is a perspective view of the SMT connector 41 before the slider 45 is assembled. 5B is a perspective view of the slider 45, and FIG. 5C is an enlarged view of the insertion hole 44 formed in the side wall 43 of the housing 42. First, in order to assemble the slider 45 into the housing 42, the slide portion 46 of the slider 45 is placed at the inner side of the horizontal portion 441 of the L-shaped insertion hole 44 of the housing 42 (see FIG. 4).
(A) is right side). After that, the SMT connector 41 is laterally inserted into the printed board 15 and held by the clip 13 provided in the housing 42. In this state, the position of the L-shaped insertion hole 44 and the height of the slide portion 46 of the slider 45 are appropriately set so that the contact tail 6 of the SMT connector 41 is in a state of floating above the surface of the printed circuit board 15. Establish. It should be noted that, in order to prevent the slide portion 46 fitted into the horizontal portion 441 of the L-shaped insertion hole 44 of the housing 42 from being dropped into the upward vertical portion 442 of the insertion hole 44 due to a slight vibration or the like, FIG. As shown in c), a protrusion 443 is provided in the vicinity of the rising vertical portion 442 of the horizontal portion 441.

Therefore, in this state, the SMT connector 41
Is the slider stopper 4 of the slider 45 described above.
Since 9 is in contact with the end surface of the printed circuit board 15, the contact insertion hole 8 side of the housing 42 does not contact the printed circuit board 15
It is in a state of protruding outward from the end surface of. Further, the contact tail 6 is in a state of being floated from the surface of the printed circuit board 15, and is in a state of being positioned slightly before the connecting terminal surface 5.

Next, the front side (contact insertion hole 8 side) of the housing 42 protruding outward from the end surface of the printed board 15 is pushed inward of the printed board 15.
Then, the slide portion 46 moves along the horizontal portion 441 of the insertion hole 44 of the housing 42, and the contact tail 6 of the SMT connector 41 moves to the connection terminal surface 5 of the printed circuit board 15.
When it is positioned above, the projection 443 provided on the horizontal portion 441 is passed over and the vertical portion 442 falls into the slide portion 46. Therefore, the housing 42 of the SMT connector 41 is lowered to the printed board 15, and the contact tail 6 comes into contact with the connection terminal surface 5 to which the paste solder 7 is applied. Therefore, since the contact tail 6 contacts the connection terminal surface 5 of the printed circuit board 15 from above, the paste solder 7 applied to the connection terminal surface 5 is not scraped off. In addition, from the lower end surface of the side wall 43 of the housing 42 shown in FIG.
4, the dimension (h1) between the upper end surfaces of the upward vertical portions 442 of
The relationship with the dimension (h2) from the lower surface of the bar portion 48 of the slider 45 to the upper surface of the slide portion 46 shown in FIG. In both Example 1 and Example 2, the dimensional difference between h1 and h2 may be any as long as the contact tail does not contact the paste solder on the connection terminal surface of the printed board, and about 0.5 mm is sufficient.

FIG. 6 shows a modification of the slider 45 shown in FIG. 5B, in which the two slide members 47 are the plate-shaped portions 4.
It is connected by 71 and is integrally molded. Also, in this embodiment, the side wall 43 of the housing 42 is
Although the L-shaped insertion hole 44 provided in is formed into an inverted F-shape by connecting two L-shapes, the two L-shapes may be provided separately, or the L-shape Considering the installation position, one L shape and one slide member 47 may be combined.

Next, a third embodiment of the present invention will be described with reference to FIGS.
It will be described based on. Note that the same parts as those of the conventional example of FIGS. In FIGS. 7 and 8, reference numeral 51 denotes an SMT connector, which has a plurality of holes 53 provided on the lower surface of the housing 52 on the lead-out side of the contact 3, and each hole 53 has a columnar thermoplastic adhesive such as epoxy resin. To form the heat-melting convex portion 54. It is preferable that the heat-melting convex portion 54 is close to the lead-out surface of the contact 3 of the housing 52, and a protrusion height from the lower surface of the housing 52 of about 0.5 mm is sufficient. Next, the mounting situation of the SMT connector 51 on the printed circuit board 15 in the third embodiment will be described. Figure 7
FIG. 7A is a front view and a side view in a state of being prepared for mounting, and FIG.
Is a front view and a side view of the mounted state, and FIG. 8 is an SMT connector 5
It is the perspective view seen from 1 downward.

First, the SMT connector 51 is laterally inserted into the printed circuit board 15 and held by the clip 13 provided in the housing 52. At the time of this insertion, the contact tail 6 of the contact 3 provided in the housing 52 is inserted in a state of floating from the surface of the printed board 15 by the action of the heat-melting convex portion 54, and the printed board 1
5 is located on the connection terminal surface 5. And
In this state, when soldering (IR.VRS reflow) is performed including components (not shown) mounted on the printed circuit board 15, heat generated during the soldering causes the above-mentioned heat-melting convex portion 54 of the thermoplastic adhesive. Dissolves. Due to this melting, the SMT is pressed against the printed circuit board 15 by the clip 13.
The connector 51 is in close contact with the printed board 15, the contact tail 6 is in contact with the paste solder 7 surface of the connection terminal surface 5 of the printed board 15, and is soldered by the soldering step.

The cross-sectional shape of the heat-melting convex portion 54 of the thermoplastic adhesive provided on the lower surface of the housing 52 may be a square shape as long as the height as described above can be maintained, and the tip shape thereof. Is not limited to a flat surface, and may have an arc shape or a trapezoid shape. Further, as shown in FIG. 9, a groove 55 may be provided in the longitudinal direction of the lower surface of the housing 52, and a thermoplastic resin in the shape of a square material may be pressed into the groove 55 to form the heat-melting ridge 56. Further, although not shown, a rectangular thermoplastic resin may be provided in the width direction of the lower surface of the housing 52, or the columnar thermoplastic resin shown in FIG. 8 may be provided in an appropriate number in the width direction. . In this case, the housing 52 is inserted into the printed board 15 substantially in parallel.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the conventional example of FIGS. 11 to 13 described above are denoted by the same reference numerals, and the description thereof will be omitted. In FIG. 10, reference numeral 61 is an SMT connector, and a plurality of convex portions 63 are formed on the lower surface of the housing 62 on the lead-out side of the contact 3. Further, the printed circuit board 16 is provided with a concave portion 64, and the concave portion 64 is provided in the housing 62 when the contact tail 6 of the contact 3 of the housing 62 is located on the connection terminal surface 5 of the printed circuit board 16. The convex portion 63 is formed in a positional relationship in which it is dropped. It should be noted that the convex portion 63 should be close to the lead-out surface of the contact 3 of the housing 62, as in the third embodiment described above, and a protrusion height from the lower surface of the housing 62 of about 0.5 mm is sufficient. The positional relationship of the convex portions provided on the lower surface of the housing in the third and fourth embodiments is as follows.
Considering the ease of work when temporarily fixing the housing to the printed circuit board, it is desirable to provide the clip between the tip on the side of the holding portion and the end surface on the side of the contact tail. As for the size of the cylindrical convex portion, it is sufficient that the diameter is 0.5 mm and the number is at least two.

Next, the mounting condition of the SMT connector 61 on the printed board 16 in the fourth embodiment will be described. FIG. 10 (a) is a front view and a side view of a state of preparation for mounting,
FIG. 10B is a front view and a side view of the mounted state. First, the SMT connector 61 is inserted into the printed board 16 from the lateral direction while being sandwiched by the clip 13 provided in the housing 62. At the time of this insertion, the contact tail 6 of the contact 3 provided on the housing 62
Is inserted in a state of being floated from the surface of the printed circuit board 16 by the action of the convex portion 63, and the convex portion 63 falls into the concave portion 64 of the printed circuit board 16 when it is located on the connection terminal surface 5 of the printed circuit board 16. In this state, the SMT connector 61 is pressed against the printed circuit board 16 by the clip 13.
Will be in close contact with the printed circuit board 16, and the contact tail 6 will be in contact with the paste solder 7 surface of the connection terminal surface 5 of the printed circuit board 16.

The convex portion 63 provided on the lower surface of the housing 62 may have a rectangular cross section as described in the third embodiment, and the tip shape thereof is not limited to a flat surface but a circle. It may be arcuate or trapezoidal.
Alternatively, a ridge portion may be formed on the lower surface of the housing 62 in the longitudinal direction, and a longitudinal groove into which the ridge portion falls may be provided in the printed board 16. Further, a suitable number of columnar protrusions 63 may be provided in the width direction of the lower surface of the housing 52, and the printed circuit board 15 may be provided with a recess 64 into which the protrusions 63 are dropped at predetermined positions.
In this case, the housing 62 is inserted substantially parallel to the printed board 16. Although not shown in the drawing, the concave portion 64 provided in the printed circuit board 16 is a printed circuit board 1
It may be formed as a hole passing through 6. In addition, since the through hole in this case may have a small diameter, it does not adversely affect the printed circuit board. When the convex portion has a columnar shape, a diameter of the concave portion of about 0.8 mm is sufficient.

[0028]

As described above, in order to temporarily fix the SMT connector to the printed circuit board, the lock pin provided on the SMT connector has been fitted into the lock pin insertion hole of the printed circuit board in the related art. A lock pin insertion hole had to be provided. Therefore, there is a problem that the wiring pattern provided on the surface of the printed circuit board or inside the multilayer printed circuit board is damaged.
By temporarily fixing with the clip provided on the MT connector, the lock pin insertion hole is not required, and the above-mentioned problem can be solved. At the same time, the so-called Russell problem of scraping off the paste solder applied to the connection terminal surface of the printed circuit board by the contact tail generated by using the clip also causes the contact tail to be located on the connection terminal surface while floating from the printed circuit board surface. This is a solution to the above problem, and it has a practical effect of enabling soldering of the contact tail to the connection terminal surface with stable strength. Although the purpose was to not make a hole in the printed circuit board, in the fourth means, a hole or groove must be provided. However, there is an effect that the hole diameter can be reduced to about one-third as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a front view and a side view of a first embodiment of the present invention in an assembled state.

FIG. 2 is a perspective view of an SMT connector and a slider according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a slider according to a first embodiment of the present invention.

FIG. 4 is a front view and a side view of a second embodiment of the present invention in an assembled state.

FIG. 5 is a perspective view of an SMT connector and a slider according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a slider according to a second embodiment of the present invention.

FIG. 7 is a front view and a side view in an assembled state of a third embodiment of the present invention.

FIG. 8 is a perspective view from below of an SMT connector according to a third embodiment of the present invention.

FIG. 9 is a perspective view from below of an SMT connector according to a third embodiment of the present invention.

FIG. 10 is a front view and a side view of a fourth embodiment of the present invention in an assembled state.

FIG. 11 is a perspective view of a conventional SMT connector and a printed circuit board.

FIG. 12 is a perspective view of an SMT connector and a printed circuit board searched for in a process of improving the conventional example and utilizing the present invention.

FIG. 13 is a side view of the SMT connector for explaining problems of the SMT connector when searching.

[Explanation of symbols]

 1,2,31,41,51,61 SMT connector 2,22,32,42,52,62 Housing 3 contacts 4,15,16 Printed circuit board 5 Printed circuit board connection terminal surface 6 Contact tail 7 Paste solder 8 Contact insertion Hole 9 Lock pin 10 Lock pin mounting guide 11 Lock pin insertion hole 12 Lock pin locking part 13 Clip 14 Clip holding part 33,43 Side wall 34,44 of housing lower surface Side wall insertion hole 35,45 Slider 36,46 Slide Part 37, 47 Slide member 38, 48 Crosspiece 39 Housing stopper 49 Slider stopper 53 Housing hole 54 Heat-melting convex portion 55 Housing groove 56 Heat-melting convex portion 63 Housing convex portion 64 Printed circuit board concave portion

Claims (4)

[Claims] 1. A plurality of contacts each having a spring-like contact tail that comes into contact with a connection terminal surface of a circuit pattern of a printed circuit board, and a contact insertion hole for fixing the contacts and inserting a contact of a mating connector. A surface-mounting connector including a housing having Ls corresponding to each other on both lower surfaces of the housing of the connector.
Side walls each provided with a V-shaped insertion hole, a slide portion that slides in the horizontal portions of the L-shaped insertion holes of both side walls and is inserted into the upward vertical portion, and the slides. A slider that has a crosspiece that is provided integrally with the housing and that slides on the surface of the printed circuit board, and a housing stopper that is provided on the side of the contact insertion hole of the housing for positioning the housing with respect to the printed circuit board. A clip provided on the contact insertion hole side of the housing for temporarily fixing the housing to the printed circuit board, and temporarily fixing the housing to the end surface of the printed circuit board with the clip while the housing is floated from the printed circuit board. After that, slide the slide part of the slider in the horizontal part of the L-shaped insertion hole of the housing. Connector for surface mounting, characterized in that so as to contact the contact tails to the connection terminal surface of the circuit pattern by dropping the upward vertical portion of the insertion hole of the L-shape. 2. A plurality of contacts each having a contact tail having a spring property that comes into contact with a connection terminal surface of a circuit pattern of a printed circuit board, and a contact insertion hole for fixing the contacts and inserting a contact of a mating connector. A surface-mounting connector including a housing having Ls corresponding to each other on both lower surfaces of the housing of the connector.
Side walls each provided with a V-shaped insertion hole, a slide portion that slides in the horizontal portions of the L-shaped insertion holes of both side walls and is inserted into the upward vertical portion, and the slides. And a slider provided with a cross section that is integrally provided with the printed circuit board and slides on the surface of the printed circuit board, and is provided with a stopper section for positioning with respect to the printed circuit board, and the housing is temporarily fixed to the printed circuit board. A clip provided on the contact insertion hole side of the housing for removing the housing from the printed circuit board after the housing is temporarily fixed to the end surface of the printed circuit board by the clip. Sliding inward moves the horizontal part of the L-shaped insertion hole of the housing with respect to the sliding part of the slider. Connector for surface mounting, characterized in that so as to contact the contact tails to the connection terminal surface of the circuit pattern by dropping the upward vertical portion of the insertion hole after. 3. A plurality of contacts each having a contact tail having a spring property and contacting a connection terminal surface of a circuit pattern of a printed circuit board, and a contact insertion hole for fixing the contacts and inserting a contact of a mating connector. A surface mounting connector comprising a housing having a heat-melting convex portion of a thermoplastic resin provided on a lower surface of the housing of the connector, and a contact insertion hole side of the housing for temporarily fixing the housing to a printed circuit board. And a clip provided, the heat-melting convex portion of the heat-melting convex portion due to heat when soldering the contact tail together with the components mounted on the printed circuit board in a state where the housing is floated from the printed circuit board. The contact tail is formed by melting the thermoplastic resin and connecting the contact tail to the circuit pattern. Connector for surface mounting, characterized in that so as to contact. 4. A plurality of contacts each having a contact tail having a spring property that contacts a connection terminal surface of a circuit pattern of a printed circuit board, and a contact insertion hole into which the contact is fixed and a contact of a mating connector is inserted. In a surface mounting connector comprising a housing having, when the contact tail is aligned with the connection terminal surface of the circuit pattern of the printed circuit board on the printed circuit board, the lower surface of the connector on the contact tail installation side of the housing. A convex part that fits into a concave part provided in the printed circuit board, the size of which allows the housing to float above the printed circuit board; and a clip provided on the contact insertion side of the housing for temporarily fixing the housing to the printed circuit board. A surface-mounting connector characterized by being provided.