JP4803683B2 - Socket and header for connector, and insert molding method thereof - Google Patents

Description

The present invention mainly relates to a connector socket and header for electrically connecting substrates to each other, and an insert molding method thereof.

  Conventionally, as a connector for connecting substrates, for example, a hard printed circuit board and a soft flexible printed circuit board, to each other, JP 2004-55463 A and URL “http://www.mew.co.jp”. A connector as disclosed in “/ac/download/control/connector/base-fpc/catalog/con_jpn_f4.pdf” has been proposed. This type of connector is composed of a socket and a header. The socket includes a resin socket body and a metal socket contact. The header is composed of a resin header body and a metal header contact. This type of connector has a very narrow gap (pitch) between contacts of about 0.4 mm, and a very low height of about 0.9 mm when the socket and header are connected. .

  On the other hand, as a method for manufacturing a connector made of a resin material and a metal material, generally, a contact is insert-molded when a body is molded. For example, the header in the connector disclosed in each of the above documents is manufactured by insert molding a header contact and a header body.

  However, in this type of low-profile connector, the height has to be lowered, so the thickness of the resin molded part is very thin. For this reason, when performing insert molding, the pressure of the molten resin to be injected must be very high. On the other hand, the thickness or width of the socket contact or header contact has an error with respect to the design value, and the mold must be made to be moldable even if there is such an error. Therefore, even when the precision of the mold is increased, depending on the error of each contact, the resin may protrude from the contact portion due to the high pressure of the molten resin, and burrs may occur. Therefore, the conventional low profile connector has the disadvantage that the yield in the manufacturing stage is not good.

  In many cases, the socket contact in this type of socket is curved and has a contact portion that contacts the header contact by its own elasticity. When insert-molding a socket having such a socket contact, resin enters the curved portion of the contact portion, and the elasticity of the contact portion is lost, which may make it impossible to mount the header on the socket. . In particular, since this type of connector has a very narrow pitch between the contacts, it has been very difficult to increase the accuracy of the mold so that the resin does not enter the contact portion of the socket contact.

The present invention aims at improving the socket and header for connectors, and these insert molding methods , and more specifically, in order to eliminate the inconvenience, a connector socket and header that can suppress the occurrence of burrs and the like , An object of the present invention is to provide these insert molding methods .

In order to achieve the above object, a connector socket of the present invention comprises a socket fixed to one of a pair of wiring boards and a header fixed to the other, and detachably connects the pair of wiring boards. A socket used for a connector, wherein the socket includes a resin socket body and a plurality of metal linear socket contacts provided in parallel to the socket body, and the socket contact is curved and formed. A contact portion that comes into contact with a header contact provided on the header due to elasticity of the solder, a soldering portion that protrudes from the socket body continuously with the contact portion and is soldered to a land formed on the wiring board, and the contact part and and a target fixing portion which is wider than the soldering portion is in a position between the soldering portion, the socket Di, injection and socket body base, said has a socket body fixing portion for fixing said socket contact in said socket body base in the fixing portion, the molten resin the socket body base at a predetermined first injection pressure The socket body fixing portion is molded in advance by molding, and a molten resin is injected at a second injection pressure lower than the first injection pressure, and is insert-molded together with the socket contact.

In order to achieve the object, an insert molding method for a connector socket of the present invention comprises a socket fixed to one of a pair of wiring boards and a header fixed to the other, and the pair of wiring boards. A socket insert molding method used for a connector for detachably connecting a socket, wherein the socket includes a resin socket body and a plurality of metal linear socket contacts provided in parallel to the socket body. The socket contact is curved and contacted with the header contact provided on the header by its own elasticity, and is continuously soldered to a land formed on the wiring board protruding from the socket body. Than the soldering part which is located between the contact part and the soldering part. The socket body has a socket body base portion and a socket body fixing portion for fixing the socket contact to the socket body base portion in the fixed portion; The socket body base is pre-formed by injection molding a molten resin at a predetermined first injection pressure,
The socket body base and the socket contact are positioned and placed in the cavity of the mold, the mold is closed, and a second injection pressure lower than the first injection pressure in the cavity. The socket body fixing portion is insert-molded by injecting a molten resin.

In the connector socket and the insert molding method thereof according to the present invention, the socket body base is molded in advance with a first injection pressure at which the injection pressure of the molten resin is high, and the socket body base is more than the first injection pressure. are insert molded together with the second said socket contact socket body fixing portion at an injection pressure of an injection pressure of a low melting resin. Thus, when insert molding the socket contact, since the injection pressure of the molten resin can be lowered, it is possible to perform the insert molding while maintaining the elasticity of the contact portion of the socket contact. In addition, by reducing the injection pressure of the molten resin at the time of insert molding, it is difficult for the molten resin to protrude from the surface of the socket contact.

In order to achieve the above object, a connector header of the present invention comprises a socket fixed to one of a pair of wiring boards and a header fixed to the other, and the pair of wiring boards are detachable. A header used for a connector to be connected, wherein the header includes a resin header body and a plurality of metal linear header contacts provided in parallel to the header body, A contact portion protruding toward the socket to contact a socket contact provided in the socket, and soldering that protrudes from the header body in succession to the contact portion and is soldered to a land formed on the wiring board a parts and, and the fixing portion which is wider than the soldering portion is in a position between the soldering portion and the contact portion, the Heddabode Includes a header body base, the said header contact in the fixing portion and a header body fixing portion for fixing to the header body base, said header body base injection molding a molten resin at a predetermined first injection pressure In this case, the header body fixing portion is formed by injection molding of the molten resin at a second injection pressure lower than the first injection pressure and insert molding together with the header contact.

In order to achieve the above object, the connector header insert molding method of the present invention comprises a socket fixed to one of a pair of wiring boards and a header fixed to the other, and the pair of wiring boards. A header insert molding method used in a connector for detachably connecting the header, wherein the header includes a resin header body and a plurality of metal linear header contacts provided in parallel to the header body. The header contact is formed on the wiring board so as to protrude from the header body continuously with the contact portion, and a contact portion protruding toward the socket side to contact a socket contact provided on the socket. A soldering part to be soldered to the land, and a position between the contact part and the soldering part and wider than the soldering part. It is and a target fixing portions, said header body are those having a header body base and a header body fixing portion for fixing the header contact in the object to be secured portion to said header body base,
The header body base is preformed by injection molding a molten resin at a predetermined first injection pressure, the header body base and the socket contact are positioned and placed in a cavity of a mold, The header body fixing portion is insert-molded by closing the mold and injecting molten resin into the cavity at a second injection pressure lower than the first injection pressure.

In the connector header and the insert molding method thereof according to the present invention, the header body base is molded in advance with a first injection pressure at which the molten resin has a high injection pressure, and the header body is more than the first injection pressure. it is insert molded together with the second said header contact header body fixing portion at an injection pressure of an injection pressure of a low melting resin. Therefore, when the header contact is insert-molded, since the injection pressure of the molten resin is low, it is difficult for the molten resin to protrude from the surface of the header contact.

Next, an example of an embodiment of the connector socket of the present invention and these insert molding methods will be described with reference to FIGS. FIG. 1 is an explanatory view showing the connector of this embodiment. FIG. 2 is an explanatory view showing a socket body base portion of the connector socket of the present invention. FIG. 3 is an explanatory view showing a connector socket according to the present invention. FIG. 4 is an explanatory view showing a socket contact of the connector socket according to the present invention. FIG. 5 is an explanatory view showing the header body base portion of the connector header of the present invention. FIG. 6 is an explanatory view showing a connector header according to the present invention. FIG. 7 is an explanatory view showing the header contact of the connector head of the present invention. FIG. 8 is an explanatory view showing the connection state of the connector socket and header of the present invention.

  The connector 1 of this embodiment is composed of a socket 10 and a header 40 shown in FIG. 1, and detachably connects a printed wiring board (not shown) and a flexible wiring board.

  As shown in FIG. 1, the socket 10 includes a resin socket body 11 and a metal socket contact 30. The socket body 11 includes a socket body base portion 12 shown in FIGS. 2 and 3 and a socket body fixing portion 13 shown in FIG. The material of the socket body base portion 12 and the socket body fixing portion 13 is the same resin (liquid crystal polymer in this embodiment). Further, the socket body fixing portion 13 is formed by positioning and fixing the socket contact 30 to a socket body base portion 12 that has been formed in advance, and insert molding within the mold.

  As shown in FIGS. 2A to 2C, the socket body base 12 is formed in a flat rectangular shape as a whole. Further, as shown in FIG. 2 (d), the socket body base 12 includes a thin plate-like bottom plate portion 14, a standing portion 15 that rises from the center portion of the bottom plate portion 14, and a width direction outward from the standing portion 15. And a plate-like restricting portion 16 protruding in the direction. A space surrounded by the bottom plate portion 14, the upright portion 15, and the restriction portion 16 serves as a relief groove 17 of the socket contact 30. Further, a locking hole 18 penetrating in the thickness direction is provided on the outer side in the width direction of the bottom plate portion 14. As shown in FIG. 2 (f), the locking hole 18 is a locked portion 19 whose rear surface protrudes in the longitudinal direction. In the present embodiment, the socket contact positioning groove 20 is provided on the side of the socket body base 12 in the longitudinal direction so that twelve socket contacts 30 are arranged in parallel.

  As shown in FIGS. 3D to 3F, the socket body fixing portion 13 is formed so as to surround the socket body base portion 12 and protrude in the thickness direction. A part of the socket body fixing portion 13 is a covering portion 21 that covers the surface of the socket contact 30 as shown in FIGS. Further, as shown in FIG. 3D, the socket body fixing part 13 has an fixing part 22 that is insert-molded integrally with the socket contact 30 and holds and holds a part of the socket contact 30. Moreover, the socket body fixing | fixed part 13 has the latching | locking part 23 which molten resin injected into the to-be-latched part 19 provided in the socket body base 12, and was solidified, as shown in FIG.3 (f). Yes. Moreover, the socket body fixing | fixed part 13 has the guide wall 24 which guides and positions the header body 41, when the header 40 is mounted | worn, as shown to Fig.3 (a) and (e).

  As shown in FIGS. 3D and 4, the socket contact 30 includes a contact portion 31 that comes into contact with a header contact 60 described later, a fixed portion 32 held by the fixing portion 22 of the socket body fixing portion 13, and And a soldering portion 33 to be soldered to a land of a wiring board (not shown). As shown in FIG. 4C, the contact portion 31 is formed in a substantially U shape in a side view, and is processed so that the upper end portion 31a protrudes inward. As shown in FIG. 4C, the adherend portion 32 is bent into a substantially inverted U shape. As shown in FIG. 4C, the soldering portion 33 is bent so as to protrude from the fixed portion 32 to the outside of the socket body 11.

  Further, a pressing portion 34 that extends obliquely downward is provided on the tip side of the contact portion 31 (center side of the socket body 11). As shown in FIG. 3D, the distal end side of the pressing portion 34 extends into the clearance groove 17 of the socket body base portion 12, and the distal end portion is in contact with the bottom plate portion 14 of the socket body base portion 12. . Further, as shown in FIG. 4D, the soldering portion 33 is chamfered at the corners so that the shape seen from the axial direction is an octagon. In the present embodiment, the pitch between the plurality of socket contacts 30 in FIG. 3A is 0.4 mm.

The socket 10 of the present embodiment having the above-described configuration is molded as follows. First, the socket body base 12 is molded in advance by injection molding. The injection pressure of the molten resin at this time is about 117.6 MPa (1,200 kg / cm ² ). The socket contact 30 is also formed in advance by pressing a metal plate and performing gold plating. In this case, when the metal plate is pressed, a plurality of socket contacts 30 are connected by a carrier (not shown) every required number. Next, the molded socket body base 12 and the socket contact 30 are positioned and placed in a mold (not shown) having a cavity formed in the same shape as the outer shape of the socket 10. Then, the mold is closed and the molten resin is injected into the cavity, whereby the socket body base portion 12 and the socket contact 30 are insert-molded, and the socket body fixing portion 13 is molded. At this time, the injection pressure of the molten resin is about 49 MPa (500 kg / cm ² ).

As described above, in the socket 10 of the present embodiment, when the socket body base 12 is injection-molded in advance with a high first injection pressure, the socket body base 12 and the socket contact 30 are insert-molded. Molding is performed at a low second injection pressure. Therefore, when insert molding is performed, the molten resin is unlikely to protrude from the socket contact 30, so that occurrence of burrs or the like is suppressed.

  Further, the socket 10 of the present embodiment is provided with a covering portion 21 formed at the time of insert molding between the soldering portion 33 and the contact portion 31 of the socket contact 30. For this reason, when the socket 10 is soldered onto the wiring board, even if the molten solder tries to scoop up the surface of the socket contact 30, it is blocked by the covering portion 21. Therefore, the solder does not reach the contact portion 31 of the socket contact 30 during soldering. Thereby, the connection of the socket contact 30 and the header contact 60 is performed reliably.

  Next, the header 40 of this embodiment will be described with reference to FIGS. As shown in FIG. 1, the header 40 of the present embodiment includes a resin header body 41 and a metal header contact 60. The header body 41 includes a substantially thin plate-like header body base portion 42 shown in FIGS. 5 and 6 and a header body fixing portion 43 provided around the header body base portion 42 shown in FIG. 6. The header body fixing portion 43 is formed by positioning and fixing the header contact 60 to a previously formed header body base portion 42 and insert-molding it in a mold.

  As shown in FIGS. 5A and 5D, the header body base portion 42 is formed in a flat rectangular shape as a whole. The header body base 42 includes a thin plate portion 44 as shown in FIG. 5 (d) and a lateral edge of the thin plate portion 44 as shown in FIGS. 5 (a) to 5 (f). And a guide wall 45 protruding in the thickness direction. In the portion where the guide wall 45 is provided, a locking hole 46 penetrating the front and back of the guide wall 45 and the thin plate portion 44 is provided. As shown in FIG. 5 (e), the locking hole 46 is a locked portion 47 whose rear side protrudes inward in the short direction. In addition, positioning grooves 48 and positioning protrusions 49 are provided on the side of the thin plate portion 44 in the longitudinal direction so that twelve header contacts 60 are arranged in parallel.

  As shown in FIGS. 6A, 6 </ b> D, and 6 </ b> E, the header body fixing portion 43 is formed so as to protrude in the thickness direction surrounding the side edge in the longitudinal direction of the header body base portion 42. . Further, as shown in FIGS. 6D and 6E, the header body fixing portion 43 is insert-molded integrally with the header contact 60 and has a fixing portion 50 that fixes and holds a part of the header contact 60. is doing. Moreover, the header body fixing | fixed part 43 has the latching | locking part 51 which the molten resin was inject | poured and solidified in the to-be-latched part 47 provided in the header body base 42, as shown in FIG.6 (e). Yes. Further, as shown in FIG. 6A, a part of the longitudinal side edge of the header body fixing portion 43 forms a guide wall 45 integrally with the guide wall 45 of the header body base portion 42.

  As shown in FIGS. 6D and 7, the header contact 60 includes a contact portion 61 that contacts the socket contact 30, a fixed portion 62 that is held by the fixing portion 50 of the header body fixing portion 43, and an unillustrated portion. And a soldering portion 63 to be soldered to the land of the wiring board. As shown in FIG. 7C, the contact portion 61 is formed in a trapezoidal shape in a side view. Further, the contact portion 61 is provided with a contact protrusion 64 that contacts the contact portion 31 of the socket contact 30. Further, as shown in FIG. 7D, the soldering portion 63 is chamfered at the corner so that the shape seen from the axial direction is an octagon.

  The connector 1 configured as described above is connected as shown in FIG. First, when the socket 10 and the header 40 relatively approach each other from the state shown in FIG. 8A, the tip of the contact portion 61 comes into contact with the contact portion 31. When the socket 10 and the header 40 further approach from this state, the upper end portion 31a of the contact portion 31 is pushed out by the contact portion 61 as shown in FIG. At this time, the fixed portion 32 of the socket contact 30 is held by the fixing portion 22 of the socket body fixing portion 13, so that the contact portion 31 mainly spreads toward the pressing portion 34. Then, since the pressing portion 34 comes into contact with the restriction portion 16 of the socket body base portion 12, the contact portion 61 on the header 40 side is sandwiched by the upper end portion 31a of the contact portion 31 on the socket 10 side.

  When the socket 10 and the header 40 further approach from this state, the contact protrusion 64 provided in the contact portion 61 on the header 40 side passes through the upper end portion 31a protruding inside the contact portion 31 on the socket 10 side. Since it moves into the contact portion 31, a connection feeling is generated between the socket 10 and the header 40. Further, since the contact portion 61 on the header 40 side has a trapezoidal shape extending in a direction away from the socket 10 side, when the socket 10 and the header 40 are connected, the upper end portion 31a of the contact portion 31 on the socket 10 side. Is expanded to the connection portion 61 on the header 40 side. Then, the pressing portion 34 of the socket contact 30 is strongly bent by the restriction portion 16 of the socket body base portion 12, and the pressing force applied to the contact portion 61 on the header 40 side by the contact portion 31 on the socket 10 side increases. Furthermore, the contact protrusion 64 provided on the contact portion 61 on the header 40 side is in a state of being engaged with the upper end portion 31a of the contact portion 31 on the socket 10 side. Thereby, the connection between the socket 10 and the header 40 becomes strong.

  The socket 10 and the header 40 of the present embodiment have a height of 0.9 mm when both are connected. Even in such a low-profile connector, the socket 10 can be insert-molded with the socket body 11 and the socket contact 30, and the surface of the socket contact 30 can be covered with the covering portion 21. The socket 10 that can be reliably prevented can be provided.

  In addition, each dimension in the said embodiment is an example, and is not restricted to these dimensions. For example, the height when the socket 10 and the header 40 are connected can be applied to all so-called low-profile connectors having a height of 0.75 mm to 5.0 mm (in recent years, 2.0 mm or less). Also, the pitch and number of socket contacts 30 can be applied to any required number. Also, the injection pressure of the molten resin can be appropriately changed depending on the shape of the socket 10 and the header 40 and the type of resin used as a raw material. Further, the connector 1 may connect not only the printed wiring board and the flexible wiring board but also the printed wiring boards or the flexible wiring boards. Moreover, in the said embodiment, although the to-be-latched parts 19 and 47 are each provided in the through-holes 18 and 46, it is not restricted to this, The body base part shape | molded previously, The body fixed part insert-molded later, It is sufficient that the shape is such that does not separate, and it is sufficient that the locking portion is locked to the locked portion.

Explanatory drawing which shows the connector of this embodiment. Explanatory drawing which shows the socket body base part of the socket for connectors of this invention. Explanatory drawing which shows the socket for connectors of this invention. Explanatory drawing which shows the socket contact of the socket for connectors of this invention. Explanatory drawing which shows the header body base part of the header for connectors of this invention. Explanatory drawing which shows the header for connectors of this invention. Explanatory drawing which shows the header contact of the head for connectors of this invention. Explanatory drawing which shows the connection state of the socket for connectors of this invention, and a header.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Connector, 10 ... Socket, 11 ... Socket body, 12 ... Socket body base part, 13 ... Socket body fixed part, 30 ... Socket contact, 31 ... Contact part, 33 ... Solder part, 40 ... Header, 41 ... Header body 42 ... Header body base part, 43 ... Header body fixing part, 60 ... Header contact, 61 ... Contact part, 63 ... Soldering part.

Claims (4)

A socket used for a connector for detachably connecting the pair of wiring boards, comprising a socket fixed to one of the pair of wiring boards and a header fixed to the other,
The socket includes a resin socket body, and a plurality of metal linear socket contacts provided in parallel to the socket body,
The socket contact is curved and contacted with the header contact provided on the header by its own elasticity, and is soldered to a land formed on the wiring board that protrudes from the socket body continuously with the contact portion. A soldered portion, and a portion to be fixed located at a position between the contact portion and the soldered portion and wider than the soldered portion ,
The socket body has a socket body base and a socket body fixing portion for fixing said socket contact in said socket body base in the object to be fixed portion,
The socket body base portion is pre-formed by injection molding a molten resin at a predetermined first injection pressure, and the socket body fixing portion is injected with a molten resin at a second injection pressure lower than the first injection pressure. The connector socket is formed by insert molding together with the socket contact. A socket insert molding method used for a connector for detachably connecting the pair of wiring boards, comprising a socket fixed to one of the pair of wiring boards and a header fixed to the other.
The socket includes a resin socket body, and a plurality of metal linear socket contacts provided in parallel to the socket body,
The socket contact is curved and contacted with the header contact provided on the header by its own elasticity, and is soldered to a land formed on the wiring board that protrudes from the socket body continuously with the contact portion. A soldered portion, and a portion to be fixed located at a position between the contact portion and the soldered portion and wider than the soldered portion,
The socket body has a socket body base and a socket body fixing part that fixes the socket contact to the socket body base in the fixed part,
The socket body base is pre-formed by injection molding a molten resin at a predetermined first injection pressure,
Positioning and mounting the socket body base and the socket contact in the cavity of the mold,
The socket is characterized in that the mold is closed and the socket body fixing portion is insert-molded by injecting molten resin into the cavity at a second injection pressure lower than the first injection pressure. Insert molding method. A header used for a connector for detachably connecting the pair of wiring boards, comprising a socket fixed to one of the pair of wiring boards and a header fixed to the other,
The header includes a resin header body and a plurality of metal linear header contacts provided in parallel to the header body,
The header contact includes a contact portion protruding toward the socket to contact a socket contact provided in the socket, and a land formed on the wiring board protruding from the header body continuously with the contact portion. A soldered portion to be soldered , and a fixed portion formed at a position between the contact portion and the soldered portion and wider than the soldered portion ;
It said header body has a header body base and a header body fixing portion for fixing the header contact in the object to be secured portion to said header body base,
The header body base portion is pre-formed by injection molding a molten resin at a predetermined first injection pressure, and the header body fixing portion is injected with a molten resin at a second injection pressure lower than the first injection pressure. The connector header is formed by insert molding together with the header contact. A header insert molding method used for a connector that detachably connects the pair of wiring boards, comprising a socket fixed to one of a pair of wiring boards and a header fixed to the other.
The header includes a resin header body and a plurality of metal linear header contacts provided in parallel to the header body,
The header contact includes a contact portion protruding toward the socket to contact a socket contact provided in the socket, and a land formed on the wiring board protruding from the header body continuously with the contact portion. A soldered portion to be soldered, and a fixed portion formed at a position between the contact portion and the soldered portion and wider than the soldered portion;
The header body has a header body base portion and a header body fixing portion that fixes the header contact to the header body base portion in the fixed portion.
The header body base is pre-molded by injection molding a molten resin at a predetermined first injection pressure,
Position and place the header body base and the socket contact in the cavity of the mold,
A header characterized by insert-molding the header body fixing portion by closing the mold and injecting molten resin into the cavity at a second injection pressure lower than the first injection pressure. Insert molding method.

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