JP2549644Y2 - 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 an electrical connector, and more particularly to an electrical connector for surface mounting.

[0002]

2. Description of the Related Art Conventionally, as a connector mounted on one end of a printed circuit board, a pin insertion mounting type connector is generally used. When this type of connector is mounted on a circuit board, connection terminals (pins) of the connector are inserted into a plurality of through holes formed in predetermined positions on the circuit board. Then, the connector is mounted on the circuit board by floating the printed circuit board on the molten solder and fixing the connection terminals by soldering.

In recent years, surface mounting of various electronic components has been demanded for the purpose of high-density mounting on a printed circuit board. To meet this demand, surface mount type connectors have been developed. In this device, a plurality of connection terminals are arranged in upper and lower two rows, and a circuit board is inserted between the solder tail of the upper terminal row and the solder tail of the lower terminal row. Accordingly, the connector is mounted on both sides of the circuit board while the circuit board is sandwiched between the solder tails in the upper and lower rows. However, in this mounting method, since the solder tails are present on both sides of the circuit board, both sides of the circuit board must be soldered.

In order to enable surface mounting of only one side of a printed circuit board, a method has been proposed in which a connector is directly mounted on a circuit board and temporarily fixed. However, this method requires the same size or more space on the circuit board as the mounting surface of the connector, and the mounting position of the connector is limited to either the upper surface or the lower surface of the circuit board. In order to eliminate the need for such a temporary fixing, a connector as shown in FIGS. 5A and 5B and a dedicated printed circuit board thereof are used.

In FIG. 5A, a pair of projections 7 extend from the lower surface of both ends of the housing 5 of the connector 3. On the other hand, a hole 11 into which the projection 7 is to be inserted is positioned and formed on the printed circuit board 9 in advance.

When mounting the connector 3 on the printed circuit board 9, the projection 7 of the housing 5 is inserted into the hole 11 of the board 9 from a vertical direction. Then, the housing 5 is held on the board 9 by a connector holding component (not shown) arranged on the back side of the board 9. As a result, FIG.
As shown in (B), the connector 3 is connected to the printed circuit board 9.
Attached to.

[0007]

[Problem to be solved by the invention] However, FIG.
In the connector 3 and the printed circuit board 9 shown in FIGS. 5A and 5B, the hole 11 of the circuit board 9 into which the projection 7 of the housing 5 is to be inserted is located inside the circuit board 9,
The entire housing 5 is placed on the upper side of the circuit board 9. Therefore, it is necessary to secure a relatively large space for mounting the connector 3. As a result, the space in which chip components and the like can be mounted becomes narrower, and it is not possible to cope with high-density mounting. Further, since a connector holding component separate from the housing 5 is required, there is a disadvantage that the number of components increases.

Therefore, the present invention can reduce the space required for mounting a connector on a printed circuit board,
An object of the present invention is to provide an electrical connector suitable for surface mounting, which can cope with high-density mounting, does not require temporary fixing, and does not require a connector holding component separate from the housing.

[0009]

According to the present invention SUMMARY OF THE INVENTION, the printed circuit board and a edge portion of the end portion adjacent to the recess with side edges formed with recesses, the surface real this edge portion <Desc / Clms Page number 2> An electrical connector to be mounted, when mounted on a printed circuit board, arranged to be spaced outward from the edge,
And a first surface formed with a slot extending longitudinally along the edge, and disposed opposite the edge.
A housing made of an insulating material having a planar second surface,
It is housed in the housing, one end is arranged in a slot formed in the first surface, and the other end projects from the second surface.
And a plurality of connection terminals arranged on the printed circuit board, and projecting from the second surface of the housing at both ends in the longitudinal direction, and when mounted on the printed circuit board, a pair of holding arms arranged along, from the tip of the holding arm, and a mating portion extending along the second surface, the fitting portions of these, along the length direction of the holding arms dimensions, is formed to a size corresponding to the dimensions of the recess of the printed circuit board, when mounted on a printed circuit board, and tightly fitted into the recess of the printed circuit board, the printed circuit board through the holding arm To
An electrical connector for holding a housing is provided.

[0010]

According to this electrical connector for surface mounting, the housing
The fitting part of the pair of holding arms extended from
In the recess located close to the edge of one end of the printed circuit board.
By mating, the housing is attached to the printed circuit board
Will be retained. In this state, the connection terminal is at the other end, that is,
Printed circuit end protruding from second surface of housing
Arranged on the board and misaligned with respect to the printed circuit board
Is prevented. Also, whether the fitting portion is on the second surface of the housing
Is located at the end of the holding arm projecting from
The second side of the bushing faces the edge of the printed circuit board.
The entire housing is outward from the printed circuit board
Protrude . Therefore, only a pair of holding arms are arranged on the printed circuit board, and the space required on the printed circuit board for mounting the connector is extremely small.
Further, the dimension of the fitting portion along the length direction of the holding arm is formed in a size corresponding to the size of the concave portion along the side edge of the printed circuit board, and when mounted on the printed circuit board,
Since the housing and the printed circuit board are tightly fitted in the recesses of the printed circuit board, the housing and the printed circuit board can be structurally integrated, and in particular, a force in a direction along the side edge of the printed circuit board is applied to the housing. It is smoothly transmitted to and from the printed circuit board.

[0011]

FIG. 1 shows an electrical connector according to a first embodiment of the present invention.

The electrical connector 1 has a housing 4 made of an insulating resin material. In the following description, the longitudinal direction, the depth direction, and the height direction of the housing 4 are denoted by X and X, respectively.
The directions are Y and Z.

The housing 4 has a slot surface (first surface) 4a and a mounting surface (second surface) 4b which are arranged to face each other in the Y direction. The slot surface 4a and the mounting surface 4b are arranged in a direction orthogonal to the surface of the printed circuit board 20 when the housing 4 is mounted on the printed circuit board 20.

A slot 6 extending in the longitudinal direction is formed on the slot surface 4a. From both ends of the mounting surface 4b, that is, both ends in the longitudinal direction of the slot, the holding arms 8 are respectively provided.
Are projected along the Y direction. This holding arm 8
Are arranged along the surface of the printed circuit board 20 when the housing 4 is mounted on the printed circuit board 20. A fitting portion 8a extending downward in the Z direction, that is, along the mounting surface 4b is formed at the tip of the holding arm 8. These fitting portions 8a are provided with holding arms 8
Is formed in a size corresponding to the size of a concave portion 22 described later formed along the side edge of the printed circuit board 20. A gap G is formed between the fitting portion 8a and the mounting surface 4b of the housing 4.

In the slot 6, a plurality of connection terminals 10 are arranged, for example, in a line. The plug 10a forming one end of the connection terminal 10 is located in the slot 6, while the solder tail (not shown) forming the other end of the connection terminal 12 is mounted on the mounting surface 4b.
It is projected from.

As shown in FIG. 2A, the printed circuit board 20 on which the connector 1 is mounted has recesses 22 formed at both ends in the X direction at one end. Each recess 22, the printed circuit board 2 0 of the one end of the edge portion 2 0 a a Y direction, that the printed circuit board 2
Along the 0 side edge, they are arranged with a width a. Thus in the longitudinal direction of the <br/> both ends in the one end portion of the printed circuit board 2 0, by the recess 22, the convex portion 24 is formed.
The width a of the projection 24, that is, the distance between the edge 20a and the edge of the recess 22 on the side close to the edge 20a is:
Preferably, the gap G of the connector 1 is equal to the width in the Y direction. The width b of the recess 22 along the Y direction, that is, along the side edge of the printed circuit board 20, is the width of the fitting portion 8a at the tip of the holding arm 8 of the electrical connector 1 in the Y direction, that is, the dimension along the length of the holding arm. Therefore, when the electrical connector 1 is mounted on the printed circuit board 20, the fitting portion 8a fits tightly into the concave portion 22. Further, the distance L between the pair of recesses 22 is equal to the pair of holding arms 8 of the connector 1.
Equal to the distance between. When mounting the electrical connector 1 on such a circuit board 20, the fitting portion 8 a at the tip of the holding arm 8 of the electrical connector 1 is fitted into each recess 22 of the printed circuit board 20. Thereby, FIG. 2 (B)
1, the electrical connector 1 is held on a printed circuit board 20. At this time, the housing 4 and the printed circuit board 20 are structurally integrated, and in particular, the force in the direction along the surface of the printed circuit board 20 smoothly moves between the housing 4 and the printed circuit board 20. Is transmitted. Also, a solder tail forming the other end of the connection terminal 12
(Not shown) is a connection run on the printed circuit board 20.
(Not shown), for example,
The state where the continuous land is pressed can be maintained.

When the width a of the projection 24 of the printed circuit board 20 is equal to the width of the gap G of the electrical connector 1,
Since the projection 24 and the gap G can be fitted to each other, the holding of the electrical connector 1 is further ensured.

With the electrical connector 1 held on the printed circuit board 20 as described above, the solder tail (not shown) forming the other end of the connection terminal 12 is connected to the connection land (not shown) of the circuit board 20. Is completed, the mounting of the electrical connector 1 is completed.

As apparent from FIG. 2B, in the electrical connector 1 surface-mounted on the printed circuit board 20, the slot surface 4a of the housing 4 extends beyond the edge 20a of one end of the board 20. The mounting surface 4 is located outside the substrate 20.
b will face the edge 20a . Therefore, the printed circuit board 2 required for mounting the electrical connector 1
Space on 0, necessary throughout the bottom area of the electrical connector 1 rather than, well only area of width a and b in one end of the substrate 20 can be suppressed to a very small area. In other words, the area on the printed circuit board 2 0 implementable chip components is increased, it is possible to correspond to high density mounting of the chip component.

The fitting portion 8a of the holding arm 8 extending from the housing 4 and the concave portion 22 of the printed circuit board 20 are closely fitted to each other to be held by the printed circuit board 2 #. It can be structurally integrated without requiring a special connector holding component separate from the printed circuit board 20. Therefore, the electric connector 1 can be manufactured by integral molding. Further, there is no need to temporarily fix the connection terminals 10 prior to soldering. Since the housing 4 and the printed circuit board 20 are structurally integrated by fitting the fitting portion 8a and the concave portion 22, the electrical connector 1
Is applied from the housing 4 to the printed circuit board 20.
To prevent the large force from being applied between the soldered connection terminal 10 and the printed circuit board 20.

Furthermore, since the electrical connector 1 is mounted on one side, the connector 1 can be soldered on the same line as the soldering process line for mounting the chip components on the printed circuit board 20. Furthermore, it is also possible to achieve a higher density of double-sided mounting with mounting a chip component on both surfaces of the printed circuit board 2 0.

FIGS. 3 and 4 show a second embodiment of the present invention. In the figure, the same components as those of the first embodiment are denoted by the same reference numerals. Moreover, the dimensioning of the recesses 22 and protrusions 24 of the holding arm 8 and the gap G, and the printed circuit board 2 0 of the housing 4 is the same as in the first embodiment. The electrical connector 2 of the second embodiment has a power supply connection terminal 12 and a signal connection terminal 14 as connection terminals.

In the power supply connection terminal 12, the plug end 12a on the slot surface 4a of the housing 4 and the solder tail 12b on the mounting surface 4b are all arranged in a line in the X direction.

On the other hand, in the signal connection terminal 14, the plug ends 14a on the slot surface 4a are arranged in two rows along the Z direction.
They are arranged in a line along the direction. That is, the solder tails 14b are bent such that the tips of the solder tails 14b of the upper and lower rows of the connection terminals 14 are alternately arranged to form one row.

It is assumed that the protruding lengths of the solder tails 12b, 14b of all the connection terminals 12, 14 from the mounting surface 4b of the housing 4 are set in the same manner. Therefore,
The tips of the solder tails 12b and 14b are also in a line.

According to the connector 2, since the solder tails 12b and 14b of the connection terminals 12, 14 including the signal connection terminals 14 in the upper and lower rows are formed in a single row, the connection lands on the printed circuit board are also formed in one row. Only the space required for soldering on the printed circuit board is small. Other effects are the same as those of the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made. For example, the holding arm 8 protruding from the mounting surface 4b of the housing 4 may be provided at a longitudinally intermediate portion of the mounting surface 4b in addition to the pair of both ends. in this case,
The printed circuit board 20, also formed a recess 22 in the middle portion of the edge portion 2 0 a.

[0028]

According to the surface mount electrical connector of the present invention, the housing and the printed circuit board are structurally integrated by closely fitting the fitting portion of the holding arm into the recess of the printed circuit board. Can be in a state,
Without the need for conventional connector holding parts and temporary fixing
Solder the connection terminals on the printed circuit board and surface mount
In particular, the force in the direction along the side edge of the printed circuit board is smoothly transmitted between the housing and the printed circuit board, and a large force acts between the connection terminal and the printed circuit board. To prevent Also, pudding
Only the holding arm is placed on the circuit board
In order to make the whole project outside from the printed circuit board,
The required space on the printed circuit board to
Source can be made extremely small.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electrical connector according to a first embodiment of the present invention.

FIG. 2 is a view showing the electrical connector and the printed circuit board of the present invention, including (A) and (B), and FIG. 2 (A) is an exploded perspective view, and FIG. (B) is a perspective view showing a state after assembly.

FIG. 3 is a front view of the electric connector according to the second embodiment of the present invention as viewed from a slot side.

FIG. 4 is a rear view of the electrical connector of FIG. 3;

FIG. 5 is a view showing a conventional electric connector and a printed circuit board, including (A) and (B), and FIG. 5 (A) is an exploded perspective view, and FIG. FIG. 4 is a perspective view showing a state after assembly.

[Explanation of symbols]

1, 2, electrical connector, 4 housing, 4a slot surface (first surface), 4b mounting surface (second surface), 6 slot, 8 holding member, 10, 12, 14 connection terminal ,
10a, 12a, 14a ... plug (one end of the connection terminal),
12b, 14b: solder tail (the other end of the connection terminal), 20
... Printed circuit board, 20a ... Edge, 22 ... Recess, 2
4 ... convex part.

Claims (2)

(57) [Scope of request for utility model registration] To 1. A printed circuit board having a side edge portion formed with recesses (22) and the edge of the one end portion adjacent to the recess (20a) (20), surface mount this edge portion An electrical connector (1), wherein when mounted on a printed circuit board (20), the electrical connector (1) is spaced outwardly from an edge (20a), and Has a first surface (4a) formed with a slot (6) extending in the longitudinal direction along the plane, and a planar second surface (4b) disposed opposite the edge portion (20a). Insulation
With product made housing (4), this is accommodated in the housing (1) within, it is arranged at one end on the first surface (4a) to form a slot (6) in the other
The printed circuit having an end protruding from the second surface (4b).
A plurality of connection terminals (10) arranged on a substrate (20 )
A second surface (4b) of the housing at both ends in the longitudinal direction.
And a pair of holding arms (8) arranged along the surface of the printed circuit board when mounted on the printed circuit board, and a second surface (4b) from the tip of each holding arm (8). comprising fitting portion extending in a direction along the (8a) in), the recess of each of these fitting portions (8a), the dimensions along the length direction of the holding arm (8) is, the printed circuit board (20) is formed to a size corresponding to the size of (22), when mounted on a printed circuit board, and tightly fitted into the concave portion (22) of the printed circuit board, via the holding arm purine
Electrical connector for holding the housing on the circuit board (20) . 2. The fitting portion (8a) and a second surface (4b).
Is formed equal to the distance between the edge (20a) of the printed circuit board (20) and the edge of the recess (22) on the side adjacent to the edge. The electrical connector according to claim 1.