JP2009117058A - Connector for circuit board and mounting structure therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for a circuit board, which can prevent the occurrence of damage to a terminal in connecting connectors. <P>SOLUTION: The connector includes: a base 3A having terminal passing holes 30A; a housing 3B which is mounted on the base 3A and has reception spaces 30B; and terminal fittings 3C which have metal fitting bodies 30C housed movably in the reception spaces 30B and elastically-deformable terminals 31C passed through the terminal passing holes 30A to permit movement action of the metal fitting bodies 30C, wherein the terminal fittings 3C include migration regulators 32C which regulate migration toward the base of the metal fitting bodies 30C, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a circuit board connector and its mounting structure, and more particularly to a circuit board connector and its mounting structure that are soldered to a printed wiring board.

  As a conventional circuit board connector mounting structure, a circuit board and a connector are provided. The connector terminal is inserted into the through hole of the circuit board, and the insertion end of this terminal is soldered to the opening periphery (land) of the through hole. In some cases, a connector is attached to a circuit board (Patent Document 1).

  The circuit board is formed by a printed wiring board having a plurality of through holes arranged in parallel at a predetermined interval.

  The connector includes a housing having a plurality of housing spaces and a plurality of terminal fittings housed in the housing spaces of the housing, and fixes the housing to the circuit board and solders each terminal fitting (terminal). Attached. And it is comprised so that it may function as a female side connector connected to a connector for connection (male side).

  Each housing space of the housing is opened in two directions. One of the openings in each housing space is inserted through a terminal insertion / extraction port for inserting / removing a male connector terminal (male terminal), and the other opening is inserted through a female connector terminal (female terminal). Each of them is formed by a terminal insertion port.

  Each of the plurality of terminal fittings has a box-shaped metal fitting main body into which the male terminal can be inserted and removed, and a female terminal attached to the metal fitting main body, and is accommodated in a plurality of accommodation spaces of the housing. Each metal fitting body is locked to the terminal insertion / extraction opening side of each housing space of the housing so as to be able to advance and retract. Each female terminal is disposed on the terminal insertion port side of each housing space of the housing, and is soldered to the peripheral edge of each through hole of the circuit board.

  With the above configuration, the connector is attached to the circuit board by inserting the female terminal from the surface side of the circuit board into the plurality of through holes and fixing the housing to the circuit board, and then inserting the insertion end of each female terminal. This is done by soldering to the periphery of the opening on the back side of each through hole.

  By the way, in this type of circuit board connector (female connector) mounting structure, the female terminal has an elastically deformable bending allowance that allows the metal body to move forward and backward, and is connected to the male connector. In addition to moving the bracket body of the female connector by following the movement of the connector (following amount of about 0.2 mm), the female terminal is bent and the overload applied to the soldered portion of the female terminal is absorbed. It has been broken.

  In this case, in order to absorb the overload applied to the soldered portion of the female terminal, it is important to set the follow amount of the female terminal as large as possible (for example, 1.0 mm).

  For this reason, a mounting structure for a circuit board connector provided with a housing having a housing space for accommodating the metal fitting body of the terminal metal fitting so as to be able to advance and retreat, and a base having a through hole through which the board side connection portion of the female terminal is inserted is proposed. ing.

As a result, when the terminal fitting of the female connector receives a pressing force from the male connector to the base side when the female and male connectors are connected, the metal fitting body of the terminal fitting moves to the base side, and the movement follows the movement. The side terminal (bending allowance portion) is bent, and an overload applied to the soldering portion of the female terminal is absorbed to prevent cracking of the soldering portion.
Japanese Patent Laid-Open No. 3-11566

  However, in the conventional circuit board connector mounting structure, if the female side connector terminal fitting receives excessive pressing force from the male side connector to the base side when the female and male connectors are connected, the female side terminal (deflection allowable portion) There has been a problem of damage due to contact with the base due to movement.

  Accordingly, an object of the present invention is to provide a circuit board connector and its mounting structure that can prevent the occurrence of breakage of terminals when the connectors are connected to each other.

(1) In order to achieve the above object, the present invention provides a housing having a housing space, a metal fitting body housed in the housing space so as to be able to advance and retreat, and an elastically deformable terminal that allows the metal fitting body to advance and retract. And a terminal fitting having a movement restricting portion for restricting movement of the metal fitting main body exceeding a predetermined range.

(2) In order to achieve the above object, the present invention includes a circuit board having a through hole and a connector having a terminal inserted into the through hole, the terminal being inserted into the through hole, In the structure in which the insertion end is soldered to the opening peripheral edge of the through hole and the connector is attached to the circuit board, the connector includes a housing having an accommodation space, and a metal fitting body accommodated in the accommodation space so as to be able to advance and retract. And a terminal metal fitting having the elastically deformable terminal that allows the metal fitting body to advance and retreat, and the terminal metal fitting includes a movement restricting portion that restricts movement of the metal fitting main body exceeding a predetermined range. A circuit board connector mounting structure is provided.

  According to the present invention, it is possible to prevent the terminal from being damaged when the connectors are connected to each other.

[Embodiment]
FIG. 1 is a cross-sectional view for explaining a case where another circuit board connector (male side connector) is connected in the circuit board connector mounting structure according to the embodiment of the present invention. 2A and 2B are a plan view and a side view, respectively, for explaining the main part (circuit board connector) of the circuit board connector mounting structure according to the embodiment of the present invention. 2A shows a plan view, and FIG. 2B shows a side view. FIG. 3 is a perspective view for explaining a terminal fitting in the circuit board connector mounting structure according to the embodiment of the present invention. FIGS. 4A and 4B are a front view and a side view, respectively, for explaining a terminal fitting in the circuit board connector mounting structure according to the embodiment of the present invention. FIG. 4A shows a front view, and FIG. 4B shows a side view.

[Overall structure of circuit board connector mounting structure]
In FIG. 1, a circuit board connector mounting structure denoted by reference numeral 1 includes a printed wiring board 2 as a circuit board and a female connector 3 mounted on the printed wiring board 2.

(Configuration of printed wiring board 2)
As shown in FIG. 1, the printed wiring board 2 is composed of a base member having a circuit pattern (not shown) on each surface, and is disposed below the printed wiring board 100. The printed wiring board 2 is provided with through-holes 2A, 2A,... (Only one is shown in the embodiment) arranged in parallel in the surface direction with a predetermined interval. The through holes 2A, 2A,... Are formed, for example, by subjecting a plurality of through holes provided in advance to the base member of the printed wiring board 2 to a copper (Cu) plating process. As the base member of the printed wiring board 2, an insulating member such as ceramic or epoxy resin is used. Further, the printed wiring board 2 is provided with a pair of screw holes (not shown) for screwing (screw coupling) with screws (not shown) inserted into screw insertion holes 320A and 320A (described later) of the base 3A. It has been.

  Similar to the printed wiring board 2, the printed wiring board 100 is formed of an insulating member such as a ceramic or epoxy resin having a circuit pattern (not shown) on each of the front and back surfaces. The printed wiring board 100 is provided with through-holes 100A, 100A,... (Only one is shown in the embodiment) arranged in parallel in the surface direction with a predetermined interval. A male connector 200 that is detachably connected to the connector 3 is attached to the surface side of the printed wiring board 100.

  The connector 200 includes terminals 200A, 200A,... (Only one is shown in the embodiment) inserted through the through holes 100A, 100A,... And a housing 200B that holds the terminals 200A, 200A,. Yes.

  The terminals 200A, 200A,... Are soldered to the back side opening peripheral edges (lands) of the through holes 100A, 100A,.

  The housing 200B has the same number of accommodation spaces 200C, 200C,... As the number of terminals 200A, 200A,... And partition walls 200D, 200D,. Both of them are shown inside).

(Configuration of connector 3)
As shown in FIG. 1 and FIGS. 2A and 2B, the connector 3 has terminal insertion holes 30A, 30A,... And housing recesses 31A, 31A,. A base 3A, a housing 3B having housing spaces 30B, 30B,... (Only one is shown in the embodiment), a metal fitting body 30C, 30C,... And terminals 31C, 31C,. Are provided on the front surface side of the printed wiring board 2.

  The base 3A has mounting pieces 32A and 32A protruding on both sides, and is fixed with the lower end face of the base in contact with the surface of the printed wiring board 2. And the whole is formed of insulating members, such as an epoxy resin. The attachment pieces 32A and 32A are provided with screw insertion holes 320A and 320A through which screws for fixing the base 3A to the printed wiring board 2 are inserted.

  The terminal insertion holes 30A, 30A,... Are opened along the axis of the through holes 2A, 2A,. The housing recesses 31 </ b> A, 31 </ b> A,... Are open to the housing side and are configured to house a part of the terminals 31 </ b> C, 31 </ b> C,.

  The housing 3B is detachably mounted on both front and rear sides of the base 3A, and is fitted in the housing spaces 200C, 200C,. The whole is formed of an insulating member made of the same material as that of the base 3A. The fitting structure of the housing 3B to the housing 200B absorbs a dimensional error (tolerance) of up to about 1.0 mm in the plane lateral direction (housing width direction) and the plane longitudinal direction (direction orthogonal to the housing width direction) during fitting. Possible plug-in structure is adopted. At the lower end of the housing 3B, there are a plurality of locking pieces 31B, 31B,... That lock the front side portion of the front and rear side portions of the base 3A, and a plurality of locking pieces 32B that lock the rear side portion. 32B,... Are provided.

  The accommodation spaces 30B, 30B,... Are open in two directions (upper connector side and circuit board connection side). One of the openings of the accommodation spaces 30B, 30B,... Is a terminal insertion / extraction port for inserting / removing the terminals 200A, 200A,... Of the connector 200, and the other opening is the terminals 31C, 31C,. It is formed by the terminal insertion port which inserts each.

  Since the terminal fittings 3C, 3C,... Are configured substantially the same, only the terminal fitting 3C will be described. As shown in FIGS. 3 and 4 (a), 4 (b), the terminal fitting 3C is partially (A part of the terminal 31C and the metal fitting body 30C) are accommodated in the accommodating space 30B of the housing 3B, and the terminal 31C is press-fitted into the terminal insertion hole 30A and held by the base 3A.

  The metal fitting body 30C is fitted in the housing space 30B of the housing 3B so as to be able to advance and retreat in a state where the surface pressure is received from the wall surface. And the whole is formed by the square-shaped cylinder body opened to an up-down direction. A pair of movement restricting pieces 32C and 32C that are opposed to each other are integrally projected from the lower opening end face of the metal fitting body 30C.

  The movement restricting pieces 32C and 32C are formed from horizontal portions 320C and 320C that are separated from the bottom of the inner surface of the base 3A by a predetermined distance L (L≈0.4 mm), and vertical portions 321C and 321C that are connected to the horizontal portions 320C and 320C. It is formed by the eaves-shaped belt-shaped member which becomes. And it is comprised so that the movement to the base side of 30 C of metal fittings main bodies exceeding the predetermined range (range from an initial position to a movement control position) L may be regulated. As a result, when the bending allowance portion 312C of the terminal 31C moves together with the metal fitting body 30C upon receiving the excessive pressing force from the connector 200 when the connector 200 is connected to the connector 3, the horizontal portions 320C and 320C of the movement restricting pieces 32C and 32C become the base. Since the terminal 31C is in contact with the terminal 3A, the terminal 31C is not in contact with the base 3A, so that the terminal 31C can be protected, and damage (plastic deformation) of the terminal 31C can be prevented.

  The terminal 31C includes a terminal connection portion 310C connected to the terminal 200A of the connector 200, a substrate connection portion 311C inserted through the through hole 2A of the printed wiring board 2, and a flexure interposed between the substrate connection portion 311C and the terminal connection portion 310C. It has an allowance portion 312C, and is entirely formed of a band-like elastically deformable terminal member made of a conductive material such as brass or phosphor bronze.

  The terminal connection portion 310C is disposed in the housing space 30B of the housing 3B and is attached to the metal fitting body 30C.

  The board connecting portion 311C is disposed outside the housing 3B, and is soldered to the periphery of the back side opening of the through hole 2A of the printed wiring board 2.

  The bending allowance portion 312C is disposed across the accommodation space 30B of the housing 3B and the accommodation recess 31A of the base 3A, and is inserted into the terminal insertion hole 30A of the base 3A, and is entirely in a plane parallel to the axis of the terminal insertion hole 30A. Thus, it is formed by a substantially S-shaped belt-like member that curves toward the base side and the housing side. And it is comprised so that the advancing / retreating operation | movement of the metal fitting main body 30C may be permitted at the time of insertion / extraction of the connector 200 by elastically deforming. Two protrusions 312c and 312c that are in pressure contact with the inner surface of the terminal insertion hole 30A of the base 3A are integrally provided on both side surfaces of the bending allowance portion 312C. As a result, the terminal fitting 3C is press-fitted into the terminal insertion hole 30A by pressing the bending allowance portion 312C and is held by the base 3A, and the soldering portion 300 of the terminal 31C receives the movement of the fitting body 30C when the connector 200 is connected to the connector 3. The load can be reduced.

[Circuit board connector mounting method]
A circuit board connector mounting method according to an embodiment of the present invention will be described with reference to FIG.

  First, the board connection portions 311C, 311C,... Of the terminals 31C, 31C,... On the axes of the through holes 2A, 2A,. The connector 3 is held in a state where the screw insertion holes 320A and 320A of the attachment pieces 32A and 32A of the base 3A are arranged on the axis of the screw hole, respectively.

  Next, the board connection portions 311C, 311C,... Of the terminals 31C, 31C,... Are inserted into the through holes 2A, 2A,... From the surface side of the printed wiring board 2, and the screws of the base 3A (mounting pieces 32A, 32A) are inserted. The bases 3 </ b> A of the connector 3 are placed on the surface of the printed wiring board 2 with the holes 320 </ b> A and 320 </ b> A communicating with the screw holes of the printed wiring board 2.

  Thereafter, screws are inserted into the screw insertion holes 320A and 320A of the mounting pieces 32A and 32A, respectively, and screwed into the screw holes of the printed wiring board 2.

Then, the insertion end portions of the board connection portions 311C, 311C,... Of the terminals 31C, 31C,... Inserted through the through holes 2A, 2A,. Solder to the land using lead-free solder.
In this way, the connector 3 can be reliably attached on the printed wiring board 2.

[Effect of the embodiment]
According to the embodiment described above, the following effects can be obtained.

(1) When the bending allowable portion 312C of the terminal 31C is moved to the base side due to excessive pressing force from the connector 200 together with the metal fitting body 30C when the connector 200 is connected to the connector 3, the movement restricting pieces 32C and 32C are brought into contact with the base 3A. Therefore, the terminal 31C does not come into contact with the base 3A, the terminal 31C can be protected, and damage (plastic deformation) of the terminal 31C can be prevented.

(2) Since the terminal fitting 3C press-fits the terminal 31C (deflection allowable portion 312C) into the terminal insertion hole 30A and is held by the base 3A, the movement of the fitting main body 30C due to the connection (insertion) of the connector 200 to the connector 3 Thus, the load received by the soldering part 300 of the terminal 31C can be reduced, and the occurrence of cracks in the soldering part 300 of the terminal 31C can be prevented.

(3) When the terminal fitting 3C receives an excessive pressing force toward the base side when the terminal 31C is pressed into the terminal insertion hole 30A, the movement restricting pieces 32C and 32C come into contact with the base 3A, so the terminal 31C comes into contact with the base 3A. The terminal 31C can be protected without causing damage to the terminal 31C.

(4) The contact position between the terminal 31C and the terminal 200A when the connector 200 is connected to the connector 3 can be restricted by the movement restricting pieces 32C and 32C, and the reliability in contact with the terminal can be ensured.

  As mentioned above, although the mounting structure of the connector for circuit boards of this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it is various. For example, the following modifications are possible.

(1) Although the case where the movement restricting pieces 32C and 32C are integrally projected on the metal fitting body 30C has been described in the present embodiment, the present invention is not limited to this, and the movement restricting piece as a separate member is provided. Even if it is attached to the metal fitting body, the same effects as in the present embodiment can be obtained.

(2) In the present embodiment, the case where the present invention is applied to the female connector 3 has been described. However, the present invention is not limited to this, and the present invention can also be applied to the male connector as in the present embodiment.

(3) In the present embodiment, the case where the terminal fitting 3C is press-fitted into the terminal insertion hole 30A with the terminal 31C (bending allowable portion 312C) held in the base 3A has been described, but the present invention is limited to this. Even if the terminal 31C is simply inserted into the terminal insertion hole 30A, the intended purpose of preventing the terminal 31C from being damaged by the movement restricting pieces 32C and 32C can be achieved.

(4) In the present embodiment, a case has been described in which the base 3A having the terminal insertion hole 30A as a box for housing the metal fitting body 30C and the housing 3B attached to the base 3A are formed. However, the present invention is not limited to this, and the box may be formed only by a housing having a terminal insertion portion through which a terminal is inserted.

Sectional drawing shown in order to demonstrate the case where the other connector for circuit boards is connected in the attachment structure of the connector for circuit boards which concerns on embodiment of this invention. (A) And (b) is the top view and side view shown in order to demonstrate the principal part (circuit board connector) of the attachment structure of the connector for circuit boards which concerns on embodiment of this invention. The perspective view shown in order to demonstrate the terminal metal fitting in the attachment structure of the connector for circuit boards which concerns on embodiment of this invention. (A) And (b) is the front view and side view shown in order to demonstrate the terminal metal fitting in the attachment structure of the connector for circuit boards which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Circuit board connector mounting structure 2 ... Printed wiring board, 2A ... Through hole 3 ... Female connector 3A ... Base, 30A ... Terminal insertion hole, 31A ... Housing recess, 32A ... Mounting piece, 320A ... Screw insertion hole 3B ... Housing, 30B ... Accommodating space, 31B, 32B ... Locking piece 3C ... Terminal metal fitting, 30C ... Metal fitting body, 31C ... Terminal, 310C ... Terminal connection part, 311C ... Board connection part, 312C ... Deflection allowable part, 312c ... Projection, 32C ... Movement restriction piece, 320C ... Horizontal part, 321C ... Vertical part 100 ... Printed wiring board, 100A ... Through hole 200 ... Male connector, 200A ... Terminal, 200B ... Housing, 200C ... Housing space, 200D ... Partition wall 300 ... Soldering part

Claims (5)

A housing having a receiving space;
A metal fitting body accommodated in the accommodating space so as to be able to advance and retreat, and a terminal metal fitting having an elastically deformable terminal that allows the metal fitting body to advance and retract.
The circuit board connector, wherein the terminal fitting includes a movement restricting portion for restricting movement of the fitting main body exceeding a predetermined range.   The circuit board connector according to claim 1, wherein the housing is attached to a base having a terminal insertion hole through which the terminal is inserted.   The circuit board connector according to claim 1, wherein the terminal fitting has a bending portion where the terminal is bent.   The circuit board connector according to claim 1, wherein the terminal fitting is held by press-fitting the terminal into the terminal insertion hole. A circuit board having a through hole;
A connector having a terminal inserted through the through hole;
In the structure in which the terminal is inserted into the through hole, the insertion end of the terminal is soldered to the opening periphery of the through hole, and the connector is attached to the circuit board.
The connector is
A housing having a receiving space;
A metal fitting body housed in the housing space so as to be able to advance and retreat, and a terminal metal fitting having the elastically deformable terminals that allow the metal fitting body to move forward and backward.
The terminal metal fitting includes a movement restricting portion for restricting movement of the metal fitting main body exceeding a predetermined range.

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