JP3269773B2 - Board mounted electrical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board-mounted electrical connector and, more particularly, to a board-mounted electrical connector including terminals to be soldered to through holes formed in a circuit board.

[0002]

2. Description of the Related Art In many cases, this type of board-mounted electrical connector is mounted on a board by soldering using an automatic device. According to this method, first, the tines of the terminals are aligned with the corresponding through holes, and the tines of the terminals enter the inside of the through holes. Thirdly, they are temporarily fixed, and thirdly, soldering connection is performed collectively by an automatic soldering device such as a reflow device. Therefore, many of these types of electrical connectors have a retention leg for temporarily fixing the electrical connector on the substrate until the soldering process. The retention leg protrudes from the mounting surface of the electrical connector to the board and is configured to engage with a through hole in the board.

Usually, such retention legs are provided near both ends in the longitudinal direction of the housing. That is, since the housing of the electric connector includes the mounting structure of the retention leg, it has a relatively large size, and there is a problem that when the electric connector is mounted on the circuit board, a relatively large mounting area is required. In addition, it is necessary to separately attach the terminal and the retention leg, which complicates the assembly process and is economically disadvantageous.

An electric connector devised to solve this problem is disclosed in Japanese Utility Model Laid-Open Publication No. 64-27880. According to the disclosed electrical connector, the electrical terminals including the connection pins that are connected to the through holes of the circuit board by soldering are arranged in parallel in the housing. The connection pins of the terminals are arranged in a line, and each connection pin is provided with a protrusion that projects in one direction with respect to the row of connection pins. According to this configuration, the mounting area of the electrical connector can be relatively small, and the assembling process can be simplified.

[0005]

However, the electric connector disclosed in the above publication has the following problems when it is temporarily fixed to a substrate.

(1) When attaching the electrical connector to the circuit board, the edge of the through hole of the circuit board and the projection of the terminal are engaged at once, and a relatively large attaching force is required.

(2) When the through hole of the circuit board and the projection of the terminal engage with each other, the guide of the terminal to the through hole is not sufficient, and the mounting is not performed smoothly. (Especially, if the terminal is guided by increasing the distance from the position of the protrusion to the tip position, the terminal will protrude more than necessary from the circuit board after mounting, and tools or other members will easily interfere with the terminal. There is a possibility that the temporary fixing will be released.)

[0008] Accordingly, it has been desired to provide an electrical connector in which these problems have been solved.

Further, not only the electric connector disclosed in the above-mentioned publication but also all the electric connectors of the type temporarily fixed to the substrate, a relatively large temporary fixing holding so that the temporary fixing is not easily released. There was a need for a configuration that would provide strength.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a board-mounted electrical connector in which solder tines of a plurality of terminals to be solder-connected to through holes formed in a circuit board are arranged in rows. The soldering tines are straight down
A first soldering tine extending, and
A second half having projections projecting in a direction substantially orthogonal to the rows
And the second soldered tine is
The flexible part is longer and coaxial than the first tines.
It is configured to project short from the bottom of the nectar housing,
When the connector housing is attached to the circuit board, the first and second tines are soldered.
The connector housing is supported on the circuit board by receiving a biasing force in the opposite direction from the hole .

That is, the board-mounted electrical connector according to the present invention comprises a plurality of contact terminals (signal terminals or ground terminals) fixed by a common fixing means in a plurality of cavities formed in the housing, and at least one support terminal. Having a terminal, each of the plurality of contact terminals including a first soldered tine extending relatively long from the housing, each of the support terminals extending relatively short from the housing,
A second soldering tine is formed such that the extending tip is formed in an arrowhead shape by a protrusion provided on one side edge near the extending tip, and the first and second soldering tines form a row. The protrusions of the second soldering tines are arranged so as to be oriented substantially perpendicular to the row.

The number of the support terminals having the second tines provided with the protrusions is preferably two or more and about half or less of all the terminals. In addition, the support terminals are preferably arranged at least near both sides to stably support the electrical connector.

The protrusion is preferably a composite protrusion having a plurality of protrusions, not only one, so that the electrical connector can be attached to circuit boards of various thicknesses.
In addition, it is preferable that the tip of the projection be sharp at an acute angle so as to strengthen the engagement with the through hole.

A notch is preferably formed on the side edge facing the projection, so that the second soldered tine can be bent by a sufficient amount in the through hole.

Further, the notched portion of the second soldered tine is formed so that the second soldered tine does not come into contact with the through-hole when the second soldered tine is bent in the through-hole of the circuit board. It is preferable to form an inclined edge from the tip to the root.

Further, the support terminal can be used not only for temporarily fixing and supporting the electrical connector but also as a signal terminal or a ground terminal for signal connection or ground connection.

In addition, the through holes formed in the circuit board need not be arranged in a straight line.
The through holes corresponding to the soldering tines may be slightly displaced by a dimension in the direction opposite to the direction in which the projections protrude.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a board-mounted electrical connector (hereinafter simply referred to as an electrical connector) 10 according to a preferred embodiment, wherein (a) is a plan view, (b) is a front view, and (c) is a front view. The right side view and (d) show the left side view, especially (c)
Inside, the direction of attachment to the substrate is indicated by arrow C.

Referring to FIGS. 1A to 1D, the electrical connector 10 includes a housing 20 and a plurality of terminals 30, 50, 70 arranged in parallel in the housing 20. The housing 20 has a key member 21 protruding from the fitting surface, a post 22 for positioning when mounting the substrate, and an extension 23 extending rearward from both side edges of the housing 20.

FIG. 2 is a cross-sectional view of each of the terminals 30, 50 and 70. FIG. 2A shows reference numeral 3.
The signal terminals denoted by 0 are shown with the housing cross section. The signal terminal 30 has a main body portion 31, a tab-shaped contact portion 32, and a soldering tine portion (first soldering tine) 33 extending to the bottom surface 21 side of the housing 20. The signal terminal 30 is pressed and inserted into the cavity 25 from the rear of the housing 20 and is locked and fixed by press-fitting projections 35 formed on both side edges 34 of the main body 31. A pressing edge 36 for pressing the signal terminal 30 is formed at the last edge of the signal terminal 30. Further, a lug 37 formed on the rear side of the press-fit projection 35 functions as a stopper for stopping insertion of the signal terminal 30. In addition, the signal terminal 30 is cut from a carrier strip (not shown) at the time of press insertion, and this cut portion is indicated by reference numeral 38 in FIG. Also. The tab-shaped contact portion 32 has a tapered surface 39 on three sides so that it can be fitted with a mating receptacle contact (not shown) from three sides.

FIG. 2B shows a ground terminal indicated by reference numeral 50. The ground terminal 50 includes the same configuration as the signal terminal 30, and the same configuration is denoted by the same reference numeral as used in FIG. 2A, and the description is omitted. The difference between the ground terminal 50 and the signal terminal 30 is that
It is in. As can be understood from FIGS. 2A, 2B and 1D, the tab-shaped contact portion 52 of the ground terminal 50 is larger in size than the tab-shaped contact portion 32 of the signal terminal 30, and the main body portion 3 is formed.
1 is formed with substantially the same width. This is a configuration for a so-called sequential connection in which a signal connection is made after a ground connection is made.

FIG. 2C shows a support terminal indicated by reference numeral 70. The support terminal 70 does not have a tab-shaped contact portion, but has a main body 31 and support legs (second soldering tines) 80 having substantially the same shape as those of the signal terminal 30 and the ground terminal 50. Further, the support terminal 70 is provided with the pressing side 3 having the same function as the signal terminal 30 and the ground terminal 50.
6, including ears 37 and cuts 38. Press-fit projections 35 are formed on both side edges 34 of the main body 31.

The support legs 80 extend from the bottom surface 21 of the housing 20 by a relatively short dimension. According to FIG. 1C or 1D, it is understood that the support leg 80 extends shorter than the tine portion 33. These operations will be described later. Further, according to FIG. 2C, the support terminal 70 has an arched punched edge 71, and a relatively long flexible portion is formed, whereby the support leg 80 is given sufficient elasticity.

In the vicinity of the distal end 82 of the extending portion of the support leg 80, a projection 81 is formed on one side edge so as to protrude in a substantially perpendicular direction. According to the preferred embodiment, the projections 81 are 81a, 8
1b are formed, and the projection 81a closer to the tip 82 has a first inclined edge (guide edge) 83 extending continuously from the tip 82. Further, the opposite side edge near the distal end 82 of the support leg 80 is cut out to form a second inclined edge 84 extending substantially linearly. The operation of these inclined edges 83 and 84 will be described later.

As described above, the plurality of terminals 30, 50, and 70 have substantially the same press-fitting structure (the main body 31, the press-in protrusions 35 and the ears 37), and the housing 20 has cavities 25 of substantially the same shape and size. Are formed, each terminal 30,
50 and 70 can be attached to arbitrary positions. FIG.
According to (a) and (b), of the seven cavities 25 of the electrical connector 10, the support legs 8 are attached to the cavities 25 at both ends.
0, the ground terminal 50 is placed in the third cavity 25 from the left, and the other cavities 25 are placed.
The signal terminal 30 is placed inside. As understood from FIGS. 1A to 1D, the tine portions 33 of the signal terminal 30 and the ground terminal 50 and the support legs 80 of the support terminal 70 are arranged in a row. Therefore, the projections 81 of the support legs 80 project from the row in a substantially right angle direction.

The electric connector 10 is attached to one end of the circuit board 100 as shown in FIG. Through holes are formed in the circuit board 100 at corresponding positions in advance. FIG. 3 is a partially enlarged plan view of the circuit board 100 to which the electrical connector 10 is attached. Circuit board 1
00 is partially cut away, and the mounting position of the electrical connector 10 is indicated by a broken line. As shown,
The circuit board 100 has eight through holes 110a through 110a.
10h are formed. The through hole 110h located third from the right in FIG. 3 is for receiving the post 22. The position of the housing 20 is determined by receiving the post 22 in the through hole 110h.

Other seven through holes 110a to 110a
0g is for receiving the terminals 30, 50, 70, and is formed substantially in a line. Through holes 110a at both ends
And 110g are slightly offset from the row, and have a diameter slightly larger than the through holes 110b to 110f.

The circuit board 100 of the electrical connector 10 will be described below.
The step of attaching to the device will be described. FIG. 4 shows the tine section 33.
Further, a side view in which the support leg 80 and its peripheral portion are enlarged is shown.

In the first stage of mounting, first, the through holes 110b to 110f of the circuit board 100 are aligned with the corresponding tine portions 33, and the tine portions 33 are inserted into the through holes 110b to 110f. At this time, the mounting surface 120 of the circuit board 100 shown in FIG.
Reaches the position P in FIG.

In the second stage of mounting, the through holes 110a
And the support leg 80 is inserted into the support legs 110g. Circuit board 10
When 0 is at the position P in FIG. 4, the inclined edge 83 of the support leg 80 is the rear edge of the through hole 110g shown in FIG. 5 (110a is omitted in the following description because the same applies to 110a). 130a is almost in contact with a part of
Further, as described above, since a part of each tine portion 33 enters the corresponding through hole 110b to 110f, the movement of the housing 20 in the in-plane direction of the circuit board is restricted to some extent. The supporting leg 80 has a through hole 110g
When inserted into the inside, the rear edge 130a of the through hole 110g guides the inclined edge 83 of the support leg 80, and the tine portion 33 has the through holes 110e and 110f (see FIG. 5; the same applies to 110b to 110d). Therefore, in the following description, 110b to 110d will be omitted.) Since the forward movement of the housing 20 and the tine portion 33 is restrained by this contact, when the support leg 80 is further inserted into the through hole 110g, the support leg 80
It will bend in the direction of the middle arrow A. The support leg 80 is guided by the tine portion 33 while the through-hole 1
Inserted within 10g. Mounting surface 120 of circuit board 100
When the relative position is substantially the position Q, the contact between the inclined edge 83 and the rear edge 130a of the through hole 130 is released, and the tip of the projection 81a and the rear inner surface 130b of the through hole 110g are engaged. I do. When the support legs 80 are further inserted, the relative position of the mounting surface 120 reaches R, but Q
From the position to the R position, the amount of deflection of the support leg 80 is maintained at a substantially constant amount.

In the third stage of mounting, the post 22 is inserted into the through hole 110h. The insertion engagement of the post 22 with the through hole 110h is intended to correct a slight displacement of the housing 20 caused in the above-described steps up to the second stage of mounting and to arrange the housing 20 at a predetermined position. I do. As shown in FIG. 4, a tapered surface 24 for guiding is formed on the periphery of the tip of the post 22, so that the through hole 110h is formed.
Smooth insertion is possible. Upon completion of this third step, the electrical connector 10 is completely mounted on the circuit board and the mounting surface 120
, And the relative position of the mounting surface 120 is the position of S in FIG. In the course of the third stage, the mounting surface 120 and the projection 81b intersect.
Engagement between the rear inner surface 130b and the projection 81b may occur.
That is, when the electrical connector 10 is completely attached, both or one of the projections 81a and 81b is in engagement with the through hole 110g.

As described above, the electrical connector 10 is
It is fixed at the position indicated by the broken line inside. The protrusion 81 as described above
Since a and 81b are engaged with the through hole 110g and the support leg 80 is in an elastically bent state, the support leg 80 receives a pressing force forward from the rear inner surface 130b of the through hole 110g, On the other hand, the tine part 33 is a through hole 11
0e and 110f are pressed backward from the front inner surface 140, so that the electrical connector 10
Strong support for

As described above, the projections 81a, 81 of the support legs 80
The side edge opposite to b is partially cut away to form an inclined edge 84, which allows the support leg 80 to bend sufficiently by a distance without contacting the front inner surface 130c of the through hole 110g. is there.

According to FIG. 3, the extension 23 is located on both sides of the engagement position of the tine 33 and the support leg 80. Extension 2
Reference numeral 3 functions to stably support the housing 20 on the circuit board 100.

As described above, the electrical connector according to the preferred embodiment of the present invention has been described in detail. However, this does not limit the present invention, and various modifications and changes can be made by those skilled in the art. For example, according to the preferred embodiment, electrical connector 10 includes alignment posts 22, but this is not required. The support leg 80 is provided with two protrusions 81a and 81b, but the number of protrusions may be one or three or more.

[0037]

According to the board-mounted electrical connector of the present invention, the engagement projections provided on the soldering tines of the support terminals in a state where the tines of some terminals are inserted in the through holes in advance. Is configured to engage with the through hole of the circuit board, so that the engagement of the engagement projections can be performed smoothly and with a relatively small force by the guide action of the soldered tines inserted in advance.

Further, the board-mounted electrical connector of the present invention comprises:
Since the first soldering tines and the second soldering tines having elasticity are temporarily temporarily supported on the circuit board, the electrical connector may be accidentally detached from the circuit board in a process until the soldering reflow. Absent.

[Brief description of the drawings]

1A and 1B are views showing a board-mounted electrical connector according to a preferred embodiment of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a right side view shown together with a circuit board, and (D) is a left side view.

FIGS. 2A and 2B are cross-sectional views of the board-mounted electrical connector taken along lines in FIG. 1B, wherein FIG. 2A is a cross-sectional view along line 1-1, and FIG. 2B is a cross-sectional view along line 2-2. The figure and (c) are sectional views along line 3-3.

FIG. 3 is a plan view showing a part of a circuit board to which the board-mounted electrical connector of FIG. 1 is attached.

FIG. 4 is an enlarged right side view of a part of the board-mounted electrical connector shown in FIG. 1 (c).

5 is a plan view of a circuit board in which a part of FIG. 3 is enlarged.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Board-mounted electrical connector 20 Housing 21 Bottom surface 30, 50, 70 Terminal 33, 80 Soldering tines 81a, 81b Projection 100 Circuit board 110a, 110b, 110c, 110d, 110e,
110f, 110g through hole

Claims (1)

(57) [Claims] 1. A board-mounted electrical connector in which solder tines of a plurality of terminals to be soldered and connected to through holes formed in a circuit board are arranged in a row, wherein the solder tines are disposed downward. First solder extending linearly
Attached tine and one side edge near the tip is approximately perpendicular to the row
From the second soldering tines having projections projecting in the direction
And the second soldered tine is different from the first soldered tine.
If the flexible part is long and the connector housing bottom
And when the connector housing is mounted on the circuit board, the first and second tines are soldered.
A board-mounted electrical connector, wherein the connector housing is supported on the circuit board by receiving biasing forces from the holes in directions opposite to each other.