JP3034657U - Electrical connector - Google Patents

Abstract

(57) [Abstract] [Problem] While further increasing the mounting density of a printed circuit board,
Electric connector firmly held on a printed circuit board <br><br><br> Patents-stay tuned to the technology The block portion 22 has a block portion 22, a post portion 24 protruding from the block portion and inserted into the through hole 30 of the printed circuit board, and a screw portion 28 formed at the tip portion of the post portion. An electrical connector 10 fixed on a printed circuit board by tightening a nut 40 on the.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an electrical connector for electrically and mechanically connecting an electronic device such as a hard disk device on a printed circuit board.

[0002]

[Prior art]

 For example, with downsizing and higher density of electronic devices such as notebook type or palmtop type personal computers, miniaturization of electric connectors themselves mounted on printed circuit boards is also required.

FIG. 3 shows an outline of the electric connector 2 previously developed by the applicant of the present invention for such an electronic device. Each terminal 3 accommodated in the housing portion 2 a has a tail portion extending perpendicularly to the plane of the print substrate 4. These tail parts are inserted into through holes 5 formed in the printed board 4, soldered to the through holes 5 from the back surface side of the printed circuit board 4, and through the through holes 5, a desired electric circuit is formed. It is electrically connected and mechanically fixed to the printed circuit board 4. Further, the fixing screw 6 is inserted through the mounting portions 2b protruding laterally from both ends in the longitudinal direction of the housing portion 2a and through holes formed in the printed circuit board 4, respectively. The electric connector 2 is fixed to the printed circuit board 4. The mounting portion 2b is formed in a thin structure whose height from the printed circuit board 4 is lower than that of the housing portion 2a, and when the fixing screw 6 is attached to the printed circuit board 4, the head portion of the fixing screw 6 is The printed board 4 on which various electronic components and devices are mounted does not protrude beyond the housing portion 2a, and the entire thickness is reduced. Further, the area occupied by the mounting portion 2b on the printed circuit board 4 is extremely small, and the mounting density of the printed circuit board 4 can be increased. The protrusions 2c protruding from the mounting portions 2b are inserted into the corresponding insertion holes of the printed circuit board 4 for positioning.

[0004]

However, in the case of this electrical connector, since the tail portion of the terminal projects on the back surface side of the printed circuit board, electronic parts or devices cannot be mounted on this portion. Mounting electronic components on the backside of the printed circuit board corresponding to the housing part is the same as surface mounting to solder the tail part of the terminal to the soldering pad part of the printed circuit board arranged on the housing part side. However, in this case, in order to prevent the tail portion of the terminal from separating from the soldering pad portion, it is necessary to make the structure of the mounting portion stronger.

The present invention has been made to solve the above problems, and provides an electrical connector that can further increase the mounting density of a printed circuit board and can be firmly held on the printed circuit board. With the goal.

[0006]

[Means for Solving the Problems]

 According to the present invention, a housing part molded from an electrically insulating material and containing a large number of terminals each of which is connected to an electric circuit on a printed circuit board, and a mounting part integrally molded with the housing part. The mounting portion includes a block portion placed on the surface of the printed circuit board, a post portion protruding from the block portion and inserted into a through hole of the printed circuit board, and a tip portion of the post portion. An electrical connector is provided which has a formed threaded portion and which is fixed on the printed circuit board by tightening a nut on the threaded portion.

According to this electrical connector, the mounting portion and the housing portion are integrally molded with each other by molding so that the mounting portion and the housing portion are firmly integrated. When mounting on the printed circuit board, insert the post part of the mounting part into the through hole formed in the printed circuit board, project the screw part of the tip part from the back side of the printed circuit board, and attach the nut to this screw part. Tighten. Since a separate fixing screw member is not required, it is not necessary to provide a through hole for inserting such a separate screw member in the mounting portion, and the mounting portion can be formed small and strong.

Further, the post portion of the mounting portion has a cylindrical portion having a smooth peripheral surface approximately equal to the thickness of the printed circuit board, and a threaded portion formed at the tip end. When it is fixed on the printed circuit board by tightening the nut, the mounting part can be made small and strong, and furthermore, the cylindrical part of the post part functions as a positioning means for the printed circuit board. Moreover, prevent over tightening of the nut.

In addition, a plurality of terminals are housed separately from each other, and the tail portions of the terminals to be soldered to the soldering pad portions on the surface of the printed circuit board are projected in a row from one side, and each terminal is The housing is made up of a housing made of an insulating material with the contact opening exposed on the other side and two longitudinal ends along the row of the tail. Each mounting part includes a block part mounted on the surface of the printed circuit board, a post part protruding from the block part, and a fixing part formed at the tip part of the post part for fixing to the board. An electrical connector having a section is provided. In the case of this electrical connector, the tail part of each terminal is soldered to the soldering pad part on the printed circuit board surface on the same side as the housing part, and the insertion port is opened in a direction almost parallel to the printed circuit board surface. To do. The force acting on this electrical connector through the insertion port is transmitted to the printed circuit board through the small and strong mounting portion, and a large force is prevented from acting on the tail portion of the terminal.

When the pair of mounting portions integrally formed with the housing portion are arranged at both ends in the longitudinal direction along the row of the tail portion and arranged close to the one side of the housing portion, each terminal Effectively prevent the force acting in the direction of separating from the printed circuit board surface from acting on the tail part of.

Further, according to the present invention, a plurality of terminals are housed separately from each other, and the tail portions of the terminals to be soldered to the soldering pad portions on the surface of the printed circuit board are projected in a row from one side. In addition, open the insertion port where the contact part of each terminal is exposed to the other side, and form the housing part with the housing part molded from the electrically insulating material and both ends in the longitudinal direction along this row of tail parts. Of the housing and a pair of mounting portions molded integrally with the housing, the mounting portion including a block portion mounted on the surface of the printed circuit board and the mounting portion. It has a post part that protrudes from the block part and is inserted into the through hole of the printed circuit board. This post part has a cylindrical part with a smooth peripheral surface that is almost equal to the thickness of the printed circuit board and the tip part. Formed And a screw portion, and by tightening a nut on the screw portion, an electrical connector fixed on the printed board is provided. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0012]

[Embodiment]

 1 and 2 show an electrical connector 10 according to a preferred embodiment of the present invention. The electrical connector 10 has a housing 12 and a mounting portion 14 that are integrally molded from an insulating material. A large number of terminals 16 are housed in the housing portion 12 in a state of being insulated from each other, and are attached to the printed circuit board 18 by the attaching portion 14. Any suitable insulating material can be used to form the housing portion and the mounting portion, but PPS (poniphenylin sulfide) resin is preferable in order to obtain the required heat resistance, insulating property and strength. The electric connector 10 is mounted on a printed circuit board 18 which is generally called a mother board of a small electronic device such as a portable computer which is commonly called a palmtop type, and an electronic device (not shown) such as a hard disk device is mounted on the printed circuit board 18. It can be mechanically mounted on the printed circuit board 18 and used to electrically connect to an electric circuit formed on the printed circuit board 18.

As shown in FIGS. 2A to 2D schematically showing the plane, front face, bottom face and side face of the electric connector 10, the electric connector 10 is provided with terminals from one side of the housing portion 12. It has a substantially rectangular parallelepiped structure in which a tail portion 16a of 16 is projected and an insertion port 20 for guiding and receiving a pin terminal of an electronic device mounted on the printed circuit board 18 is opened on the other side. The contact portions (not shown) of the terminals 16 are exposed in the insertion openings 20 arranged in the upper and lower two stages, and contact the pin terminals inserted in the insertion openings 20 to electrically Connected. On the other hand, as clearly shown in FIGS. 2A and 2C, the tail portions 16a are arranged so as to project in a row from one side of the housing portion 12, and are arranged on the printed circuit board 18 as shown in FIG. It is soldered to the soldering pads 18a arranged in a line, and is electrically connected to an electric circuit on the printed circuit board 18 through these pads 18a.

The mounting portions 14 for mounting the electric connector 10 on the printed circuit board 18 are arranged in pairs at both ends in the longitudinal direction of the housing portion 12. Each of the pair of mounting portions 14 is a housing. It is formed of a block portion 22 integrated with the portion 12 and a post portion 24 protruding from the block portion 22 toward the printed circuit board 18.

It is preferable that the block portion 22 projects more than the housing portion 12 on both the side where the tail portion 16 a projects, that is, one side of the housing portion 12 and the printed circuit board 18 side. In this case, the rows of the tail portions 16a of the terminals 16 are arranged between these block portions 22, and when the electric connector 10 is mounted on the printed circuit board 18, the surface portion of the printed circuit board 18 faces the surface portion of the printed circuit board 18. A gap can be formed between the housing part 12 and the housing part 12.

The post portion 24 protruding from the block portion 22 includes a cylindrical portion 26 having a smooth peripheral surface having an axial length substantially equal to the thickness of the printed circuit board 18, and a screw portion 28 formed at the tip portion thereof. Is formed by. The cylindrical portion 26 can be formed to have a diameter substantially equal to the diameter of the through hole 30 of the printed circuit board 18. In this case, the positioning projection and the insertion hole in the conventional electric connector can be omitted. .

Instead of the post portion 24 and the screw portion 28, an appropriate fixing means for fixing the post portion 24 to the printed circuit board 18 may be provided. When mounting the electrical connector 10 on the printed circuit board 18, the post part 24 of the mounting part 14 is inserted into the through hole 30 of the printed circuit board 18, and the block part 22 is placed on the printed circuit board 18. Each tail portion 16a of the electrical connector 10 is aligned with a corresponding pad 18a on the print substrate 18 and contacts each other. Then, the nut 40 is fastened to the screw portion 28 from the opposite side of the printed board 18, and the electric connector 10 is fixed to the printed board 18. Since the cylindrical portion 26 has an axial length substantially equal to the thickness of the printed circuit board 18, the nut 40 is not overtightened to prevent damage to the printed circuit board 18 or the post portion 24. Further, since the diameter of the cylindrical portion 26 is formed to be substantially equal to the diameter of the through hole 30, the tail portion 16a does not displace from the pad 18a.

After being attached to the printed circuit board 18, the tail portions 16a and the pad portions 18a are collectively soldered by reflow soldering or the like, and the mounting of the electrical connector 10 is completed.

In the electrical connector 10 thus surface-mounted on the printed circuit board 18, the insertion port 20 is opened laterally in a direction parallel to the surface of the printed circuit board 18, so that the electrical connector 10 largely protrudes from the printed circuit board 18. There is nothing to do. The mounting portion 14 is composed of a block 22 integrated with the housing portion 12 and a post portion 24 protruding from the block 22, and a nut 40 that is fastened to a screw portion 28 formed on the post portion 24 is used to attach the printed circuit board 18 to the printed circuit board 18. Since it is mounted on the top, there is no need for a fixing screw as in the past. Further, since it is not necessary to form an opening for inserting a separate fixing screw in the mounting portion 14, the mounting portion 14 can be formed small and strong. Further, since the tail portion 16a does not project to the back surface side of the printed circuit board 18, another electric circuit can be formed in this portion, or still another component can be mounted.

Therefore, according to the electric connector 10, the number of parts and the number of assembling steps can be reduced, so that the assembling process can be simplified and the printed board 18 can be made higher in density by the small and strong mounting portion. can do.

[0021]

[Effect of the invention]

 As is apparent from the above, according to the present invention, the mounting portion molded integrally with the housing portion has the block portion mounted on the surface of the printed circuit board and the printed circuit board protruding from the block portion. By having a post part that is inserted into the through hole and a screw part that is formed at the tip part of this post part, the mounting density of the printed circuit board can be further increased and it can be firmly held on the printed circuit board. be able to.

Further, when the post portion of the mounting portion has a cylindrical portion having a smooth peripheral surface approximately equal to the thickness of the printed circuit board and a threaded portion formed at the tip portion, tightening the nut It is possible to prevent damage to the printed circuit board or the post portion due to excess.

In addition, the housing portion accommodates the plurality of terminals in a spaced manner from each other, and the tail portions of the respective terminals to be soldered to the soldering pad portions on the surface of the printed circuit board are projected in a row from one side, In addition, when the insertion opening where the contact portion of each terminal is exposed is opened to the other side, the height of protrusion from the printed board can be reduced and surface mounting can be performed.

Further, when the pair of mounting portions integrally formed with the housing portion are arranged at both ends in the longitudinal direction along the row of the tail portion in the vicinity of the one side of the housing portion, each terminal By effectively preventing the force acting in the direction of separating from the printed circuit board surface from acting on the tail portion of, the electric connector can be extremely effectively fixed to the printed circuit board with the mounting portion having a small structure.

[Brief description of the drawings]

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

2A and 2B are views for explaining the electric connector of FIG. 1 in more detail. FIG. 2A is a plan view, FIG. 2B is a front view taken along line BB of FIG. 2A, and FIG. Bottom view taken along line CC of FIG.
(D) is a side view taken along the line DD of (B)

FIG. 3 is a perspective view of a conventional electrical connector.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electrical connector, 12 ... Housing part, 14 ... Attachment part, 16 ... Terminal, 16a ... Tail part, 18 ... Printed circuit board, 18a ... Pad part, 20 ... Insertion port, 22 ... Block part, 24 ... Post part, 26 ... Cylindrical part, 28 ... Screw part, 30 ... Through hole, 40 ... Nut.

Claims (5)

[Utility model registration claims] 1. A housing part molded from an electrically insulating material and containing a large number of terminals, each of which is connected to an electric circuit on a printed circuit board, and a mounting part molded integrally with the housing part. The mounting part includes a block part placed on the surface of the printed circuit board, a post part projecting from the block part and inserted into a through hole of the printed circuit board, and a screw formed on the tip part of the post part. And an electric connector fixed on the printed circuit board by tightening a nut on the threaded portion. 2. A housing part molded from an electrically insulating material and containing a large number of terminals each connected to an electric circuit on a printed circuit board, and a mounting part integrally molded with the housing part. The mounting portion has a block portion mounted on the surface of the printed circuit board and a post portion protruding from the block portion and inserted into a through hole of the printed circuit board. An electrical connector that has a cylindrical part with a smooth peripheral surface approximately equal to the thickness and a threaded part formed at the tip, and is fixed on the printed circuit board by tightening a nut on the threaded part. . 3. A plurality of terminals are housed separately from each other,
Insulation in which the tails of each terminal to be soldered to the soldering pad on the surface of the printed circuit board are projected in a row from one side, and the insertion port where the contact of each terminal is exposed is opened to the other side. A housing part made of material and a pair of mounting parts integrally molded with the housing part at both ends in the longitudinal direction along the row of the tail part are provided. Each mounting part is mounted on the surface of the printed circuit board. An electrical connector having a block portion, a post portion protruding from the block portion, and a fixing means formed at a tip end portion of the post portion and fixed to a substrate. 4. A plurality of terminals are housed separately from each other,
Insulation in which the tails of each terminal to be soldered to the soldering pad on the surface of the printed circuit board are projected in a row from one side, and the insertion port where the contact of each terminal is exposed is opened to the other side. A housing part made of a material, and a pair of mounting parts that are arranged in proximity to the one side of the housing part at both ends in the longitudinal direction along the row of the tail part and that are integrally molded with the housing part, Each mounting part is an electrical device having a block part mounted on the surface of the printed circuit board, a post part protruding from the block part, and a fixing part formed at the tip of the post part for fixing to the substrate. connector. 5. A plurality of terminals are housed separately from each other,
The tail portion of each terminal to be soldered to the soldering pad portion on the printed circuit board surface is projected in a row from one side, and the insertion opening where the contact portion of each terminal is exposed is opened to the other side, A housing part molded from an electrically insulating material, and longitudinal end portions along the row of the tail part are arranged close to the one side of the housing part, and molded integrally with the housing part. The mounting portion includes a pair of mounting portions, and the mounting portion includes a block portion mounted on the surface of the printed circuit board and a post portion protruding from the block portion and inserted into a through hole of the printed circuit board. The part has a cylindrical part with a smooth peripheral surface that is almost equal to the thickness of the printed circuit board, and a threaded part formed at the tip. By tightening the nut on this threaded part, Electrical connector to be fixed.