JP6095412B2 - connector - Google Patents

Description

  The present invention relates to a surface mount type connector attached to a printed circuit board.

  2. Description of the Related Art Conventionally, there is a connector that is fixed to a printed circuit board in order to connect the printed circuit board and other electrical components with a flat cable or connect the printed circuit boards to each other. As such a connector, a box-shaped insulating housing elongated in a direction along the substrate, a plurality of male (male) terminals arranged in parallel in the longitudinal direction of the housing by a plurality of guide grooves formed in the housing, and a housing A pair of reinforcing metal fittings attached to both ends in the longitudinal direction of the connector, and soldering each mail terminal to the fixing pattern of the board, and soldering the reinforcing metal fitting to the corresponding part of the fixing pattern, There is one that is firmly attached to a substrate (for example, see Patent Document 1).

JP 2000-268905 A

  The mail terminal of the connector of Patent Document 1 is formed in a substantially T-shape including a lead portion and a contact pin protruding from an intermediate portion of the lead portion. One end in the longitudinal direction of the lead part is formed wide, and the surface facing the opposite side of the contact pin across the corner of the wide part and the surface parallel to the contact pin are soldered surfaces, each type of straight or right angle Depending on the case, either one of the soldering surfaces is used for soldering to the substrate.

  On the other hand, the contact pins of the mail terminal are arranged at a constant pitch in a state of being inserted through mounting holes provided in the wall portion of the housing. Since the assembled state of the mail terminal to the housing is unstable simply by inserting such a contact pin into the mounting hole, in Patent Document 1, a short support piece extending in parallel with the contact pin is projected and the support piece is provided. Is inserted into a fitting hole provided in the wall portion of the housing. However, in order to increase the frictional engagement force between the support piece and the fitting hole, the length of the support piece, that is, the length in the depth direction of the fitting hole is increased, and a fitting hole is provided correspondingly. Since it is necessary to increase the wall thickness of the wall, there is a problem that the housing is enlarged.

  In order to solve such problems and promote the miniaturization of the surface mount connector, in the present invention, a connector having a terminal and a housing for holding the terminal, wherein the terminal includes: A holding part for holding the protruding part in an inserted state; and a leg part soldered to the board and a protruding part protruding in a direction orthogonal to the leg part and coupled to a terminal of another connector A hole, a holding groove orthogonal to and in communication with the holding hole to receive the leg, and a holding groove so as to be narrower than the width of the leg to hold the leg in a press-fit state. The leg portion is provided with a shoulder portion that engages with the convex engagement portion in the direction in which the protruding portion is removed.

  According to this, the leg portion of the terminal to be soldered to the board is received by the holding groove provided in the housing, and the holding groove is provided with a convex engagement portion for holding the leg portion in a press-fit state. In addition, since the leg portion is provided with a shoulder portion that engages with the convex engagement portion with respect to the protruding direction of the protruding portion, the leg portion is held in the holding groove so as to be held against the protruding portion. Accepted. Thereby, it is not necessary to increase the thickness of the corresponding wall portion of the housing in order to ensure the prevention of coming off due to the large frictional engagement force at the protruding portion having the contact portion, and the enlargement of the housing can be suppressed.

  In particular, the shoulder portion may extend longer than the convex engagement portion in the longitudinal direction of the leg portion. According to this, it is not necessary to set the alignment for engaging the convex engagement portion and the shoulder portion with high accuracy, and assembly can be easily performed.

  As described above, according to the present invention, the leg portion of the terminal soldered to the board is received by the holding groove provided in the housing, and the holding groove is provided with a convex engagement for holding the leg portion in a press-fit state. Since the joint portion is provided and the shoulder portion is provided on the leg portion so as to be engaged with the convex engagement portion with respect to the protruding direction of the protruding portion, the leg portion is held against the protruding portion. Is received in the holding groove. Thereby, it is not necessary to increase the thickness of the corresponding wall portion of the housing in order to ensure the prevention of coming off due to the large frictional engagement force at the protruding portion having the contact portion, and the enlargement of the housing can be suppressed.

It is a perspective view which shows the use condition of the mail connector to which this invention was applied. It is an assembly exploded perspective view of a connector in the case of using as a right angle type. FIG. 3A is a perspective view showing a terminal used in a right angle type, and FIG. 3B is a perspective view showing a terminal used in a straight type. (A) is a principal part expansion perspective view which shows the state which assembled | attached the terminal to the housing 4, (b) is a principal part expanded sectional view seen from the arrow IVb direction of (a). It is a figure which shows the penetration state to the holding hole of a terminal, (a) is the principal part expanded sectional view seen in the arrow direction of the broken line Va-Va of FIG. 4, (b) is the broken line of (a). It is the principal part expanded sectional view seen in the arrow direction of Vb-Vb. It is a principal part expanded sectional view seen in the arrow direction of the broken line VI-VI of FIG. 4 explaining the holding structure by the housing of the leg part of a terminal. (A) is the principal part expanded plane sectional view seen in the arrow direction of the broken line VIIa-VIIa of FIG. 1, (b) is the figure seen in the arrow direction of the broken line VIIb-VIIb of (a). is there. It is explanatory drawing which shows the fixation procedure to the board | substrate of a reinforcement metal fitting, (a) is a case where the connector 2 is used with a right angle type, (b) is a principal part perspective view when the connector 2 is used with a straight type.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a use state of a mail connector to which the present invention is applied. As shown in the figure, two connectors 2 are mounted on a substrate surface 1 a of the printed circuit board 1. A connector (female) connector 31 is connected to the connector 2 as shown by an arrow A in the figure. Both connectors 2 have the same structure, and by changing the mounting form on the printed circuit board 1, the connector 2 on the left side of the figure has a protruding direction of the connecting portion (contact portion 7c) of the terminal 3 with the receptacle connector 31. As a straight type that stands upright on the substrate surface 1a of the substrate 1, the connector 2 on the right side of the figure is in a state in which the protruding direction of the connection portion (contact portion 7c) of the terminal 3 with the receptacle connector 31 is along the substrate surface 1a. Each is provided as a right angle type.

  FIG. 2 is an exploded perspective view of the connector 2 when used as a right angle type. As shown in the figure, the connector 2 includes a horizontally long synthetic resin housing 4 along the board surface 1 a in a mounted state on the printed board 1, a plurality of conductive terminals 3 assembled to the housing 4, and the length of the housing 4. It is comprised with a pair of reinforcement metal fitting 5 attached to each direction both ends.

  FIG. 3A is a perspective view showing the terminal 3 in a state used for the right angle type, and FIG. 3B is a perspective view showing the terminal 3 in a state used for the straight type. As shown in the figure, the terminal 3 has a pin shape with a rectangular cross-sectional shape bent in an L shape as a whole, and has a leg portion 6 corresponding to one side of the L shape and the other side of the L shape. And a protrusion 7 that protrudes from one end of the leg 6.

  The leg portion 6 has a substantially rectangular parallelepiped block soldering portion 8 at an end opposite to the protruding portion 7 side, and a columnar holding portion 9 extending from the soldering portion 8 to a bent portion of the protruding portion 7. Have. In order to solder to the wiring pattern 20 of the printed circuit board 1, the soldering portion 8 has a right angle soldering surface 8a formed of a flat surface facing the longitudinal direction of the leg portion 6 and a right angle soldering surface 8a. And a straight soldering surface 8b facing the side opposite to the protruding portion 7 is provided.

  The projecting portion 7 is formed so as to project orthogonally from the end portion of the leg portion 6 on the holding portion 9 side, and is formed so that the thickness gradually decreases from the holding portion 9 side to the base portion 7a and the base portion 7a. The tapered portion 7b and the contact portion 7c thinner than the base portion 7a are provided in this order. The base portion 7a, the taper portion 7b, and the contact portion 7c are formed in a square cross section that is similar to each other. In addition, although the cross-sectional shape of the protrusion part 7 was made into the square in the example of illustration, it is not restricted to a square cross section, The thing of various shapes, such as a polygon including a rectangle, and a circle, may be sufficient.

  FIG. 4A is an enlarged perspective view of a main part showing a state in which the terminal 3 is assembled to the housing 4. As shown in FIG. 1, the housing 4 extends in a direction along the substrate surface 1 a from the wall portion 11 which is standing on the substrate 1 when used as a right angle type. The top plate portion 12 and the bottom plate portion 13 and the side wall portions 14 at both ends in the longitudinal direction of the housing 4 are formed. The wall portion 11 is provided with a groove-like holding groove 15 for receiving the leg portion 6 of the terminal 3 in a standing state with respect to the substrate 1, and the protruding portion 7 of the terminal 3 is provided with the top plate portion 12 and the bottom plate portion 13 A holding hole 16 is formed so as to communicate with the holding groove 15 and to form an L shape together with the holding groove 15 so as to protrude into the space therebetween.

  FIG. 4B is an enlarged cross-sectional view of the main part viewed from the direction of arrow IVb in FIG. 4A showing the soldered state of the terminal 3 to the substrate 1. As shown in the figure, when the terminal 3 is assembled to the housing 4, the right angle type soldering surface 8 a is from the bottom surface 4 a of the housing 4, and the straight soldering surface 8 b is from the wall surface 4 b of the housing 4. The fixed amount a protrudes. Thereby, when soldering each soldering surface 8a * 8b to the board | substrate 1, since the clearance gap arises between the board | substrate surface 1a and the outer surface (4a * 4b) of the housing 4, the flow of the solder by reflow is smooth. Thus, good soldering can be performed.

  FIG. 5 is a view showing a state in which the terminal 3 is inserted into the holding hole 16, and FIG. 5A is an enlarged cross-sectional view of the main part viewed in the direction of the arrow of the fracture line Va-Va in FIG. ) Is an enlarged cross-sectional view of the main part viewed in the direction of the arrow of the fracture line Vb-Vb of (a). The base 7a of the protrusion 7 is inserted into the holding hole 16 and is held in a press-fitted state. In the illustrated example, each cross-sectional shape of the protruding portion 7 and the holding hole 16 is a square. In this case, as shown in FIG. 5, the length of one side of the contact portion 7c of the protruding portion 7 is set to b1. And the length of one side of the holding hole 16 is b2, and the length of one side of the base portion 7a of the projecting portion 7 is b3, each is formed so as to have a relationship of b1 <b2 <b3. The cross-sectional shape of the holding hole 16 is not limited to the square in the illustrated example, and a similar shape in which the base portion 7a of the projecting portion 7 is in a press-fit state is preferable. If the base portion 7a has a rectangular cross-sectional shape, the similar shape is obtained. It may be a rectangular cross-sectional shape.

  Due to the above relationship, when the protruding portion 7 of the terminal 3 is inserted into the holding hole 16 as shown by the arrow B in FIG. 2, the contact portion 7c is easily inserted because it is thinner than the holding hole 16, but the base portion 7a. Since it is thicker than the holding hole 16, it is press-fitted into the holding hole 16, and when it is inserted into the holding hole 16, it is in a tight fit state. Since the tapered portion 7b is provided between the base portion 7a and the contact portion 7c, the holding hole 16 can be gradually expanded in the process of inserting the tapered portion 7b into the holding hole 16, and the terminal 3 ( The insertion operation of the protruding portion 7) can be easily performed.

  Thus, the leg portion 6 and the contact portion 7c are separated from each other by the wall portion 11, and the base portion 7a is held in the press-fitted state on the four surfaces by the holding holes 16 provided in the wall portion 11. Thereby, it is possible to block by the holding hole 16 that the flux is transmitted to the contact portion 7c in the soldering of the soldering portion 8 described later of the leg portion 6. In addition, in the protrusion direction of the protrusion part 7, the length D of the holding hole 16 is made longer than the base part 7a, and it does not press into the holding hole 16 in the middle of the taper part 7b. As a result, when the terminal 3 is plated, there is a possibility that debris may be formed by press-fitting into the holding hole 16, but there is a step (between the press-fitted portion with respect to the base portion 7a of the holding hole 16 and the contact portion 7c side ( b3-b1) occurs, and the step forms a wall that stops the plating residue.

  FIG. 6 is an enlarged cross-sectional view of the main part viewed in the direction of the arrow line VI-VI in FIG. 4 for explaining the holding structure of the leg part 6 of the terminal 3 by the housing 4 (wall part 11). On both side surfaces of the holding portion 9 of the leg portion 6, shoulder portions 9b made of vertical wall surfaces of grooves 9a having a substantially wedge-shaped cross section formed by pressing are provided. The holding groove 15 provided in the wall portion 11 of the housing 4 is provided with a convex engaging portion 15 a protruding so as to approach both inner wall surfaces corresponding to both side surfaces of the holding portion 9.

  Assuming that the width between the bottom surfaces of the pair of grooves 9a forming the shoulder portions 9b is b4, the width of the convex engaging portion 15a is b5, and the width of the holding portion 9 is b6, the relationship is b4 <b5 <b6. Has been. As a result, the leg 6 enters the holding groove 15 as the protrusion 7 is inserted into the holding hole 16. For example, the rear surface 6 a of the leg 6 opposite to the protrusion 7 side and the housing 4 In a state in which the terminal 3 is pushed in until the wall surface 4b is flush with the wall surface 4b (see FIG. 5), a part of the convex engaging portion 15a bites into the groove 9a, and the protruding portion 7 is not pulled out. Thus, the shoulder portion 9b and the convex engagement portion 15a are engaged with each other, so that the terminal 3 is prevented from coming off. In the illustrated example, the groove 9a is formed to provide the shoulder 9b. However, the opposite side of the shoulder 9b is opened so that the bottom surface of the groove 9a reaches the end surface of the leg 6 opposite to the protruding portion 7. It is good also as the concave shape made.

  Next, the attachment state to the housing 4 of the reinforcement metal fitting 5 is demonstrated. As shown in FIG. 2, the reinforcing metal fitting 5 is formed by bending a thin plate material, and is a rectangular flat plate portion 5 a and an L-shaped bent portion bent in an L shape at one longitudinal end portion of the flat plate portion 5 a. The portion 5b is extended from the L-shaped bent portion 5b so as to form a U-shaped cross-sectional shape together with the flat plate portion 5a and the L-shaped bent portion 5b, and is bent and extends substantially parallel to the flat plate portion 5a. And a pair of second engaging pieces 5d that are obliquely bent so as to approach each other at both side edges along the longitudinal direction of the flat plate portion 5a on the other longitudinal end side of the flat plate portion 5a. Yes. The engaging piece 5c is formed with two sawtooth-shaped claws 5e protruding in opposite directions from both side edges along the extending direction. The claw 5e has a slope in the extending direction of the engagement piece 5c, and is provided so as to have a right-angled corner on the opposite side. The L-shaped bent portion 5b extends over the entire length of the edge on the one end in the longitudinal direction of the flat plate portion 5a, but a hole for facilitating bending is provided in the intermediate portion in the extending direction. It is provided in a shape that makes a pair in appearance.

  FIG. 7A is an enlarged plan sectional view of the main part viewed in the arrow direction of the fracture line VIIa-VIIa in FIG. 1, and FIG. 7B is viewed in the arrow direction of the fracture line VIIb-VIIb in FIG. FIG. At the end in the longitudinal direction of the housing 4, a recess 17 is provided so as to open parallel to the end surface 4 c facing in the longitudinal direction and open to the side opposite to the wall surface 4 b, and an end surface as shown in FIG. 2. A pair of engaging grooves 18 having a wedge-shaped cross section formed at the upper and lower edges in FIG. 2 of 4c are provided. In addition, although the recessed part 17 has the shape where the wall surface 4b side was closed in the example of illustration, the through-hole shape opened to the wall surface 4b may be sufficient.

  The reinforcing metal fitting 5 is assembled to the housing 4 by aligning the pair of second engaging pieces 5d with the pair of engaging grooves 18 and inserting the engaging pieces 5c into the recesses 17 as shown by the arrow B in FIG. . The reinforcing metal fitting 5 is pushed in until the L-shaped bent portion 5b comes into contact with the end surface of the end wall portion 4d as a portion between the concave portion 17 and the end surface 4c. By setting the distance between the flat plate portion 5a and the tip of the engagement piece 5c to be narrower than the wall thickness of the end wall portion 4d (b7 in FIG. 7A), the flat plate portion is obtained by the elastic restoring force of the reinforcing bracket 5. The end wall portion 4 d can be sandwiched between the engaging piece 5 c and the reinforcing piece 5 c, and the reinforcing metal fitting 5 can be integrally attached to the housing 4. Further, the elastic restoring force of the reinforcing metal fitting 5 increases the surface pressure against the end face 4c of the flat plate portion 5a, and the retaining force of the reinforcing metal fitting 5 increases. It should be noted that the end wall portion 4d need only be sandwiched between the flat plate portion 5a and the engagement piece 5c, and is not necessarily sandwiched by the elastic restoring force.

  Further, as shown in FIG. 7B, the width between the claws 5e provided on both sides (the vertical direction in FIG. 2) of the engagement piece 5c is b8, and the width of the recess 17 in the corresponding direction is b9. Then, the relationship is set so that b8 <b9. Furthermore, since the shape of the claw 5e is a sawtooth shape having a slope inclined backward with respect to the insertion direction of the engaging piece 5c into the recess 17 and a corner perpendicular to the pulling direction as described above, The claw 5e bites into the wall surface of the recess 17, and the engagement piece 5c is firmly prevented from coming off.

  FIG. 8 is an explanatory view showing a procedure for fixing the reinforcing metal fitting 5 to the substrate 1. Although only the reinforcing metal fitting 5 is shown in the figure, it is fixed to the substrate 1 while being attached to the housing 4 as shown in FIG. A fixing pattern 19 for soldering the reinforcing metal fitting 5 is formed on the substrate surface 1a.

  FIG. 8A shows a case where the connector 2 is used in a right angle type. In this case, the L-shaped portion is formed by an L-shaped bent portion 5b and an edge continuous with the L-shaped bent portion 5b of the flat plate portion 5a. The end face 21 is soldered to the fixing pattern 19. The soldered portion 22 is a portion indicated by hatching in the figure. In the case of the right angle type, due to the shake at the time of insertion / removal of the other connector 31 (arrow C in FIGS. 1 and 8), the side 3 far from the soldering portion 8 of the terminal 3 is greatly shaken. Since the soldering portion 22 with the L-shaped end surface 21 is located on the side where such displacement increases, the housing 4 is prevented from being displaced during the insertion / removal operation of the other connector 31. The influence on the soldering state is prevented, and peeling of the soldered portion of the terminal 3 is prevented.

  FIG. 8B shows a case where the connector 2 is used in a straight type. In this case, a vertically long U-shaped end surface 23 formed by a pair of second engaging pieces 5d and an edge portion continuous with those of the flat plate portion 5a is used. Solder to the fixing pattern 19. The soldered portion 24 is a portion indicated by hatching in the figure. In the case of the straight type, the portion to which the housing 4 is to be displaced due to the deflection (arrow D in FIGS. 1 and 8) when the other connector 31 is inserted and removed is both sides corresponding to the pair of second engaging pieces 5d. It becomes a shake. The soldering portion 24 with the vertically long U-shaped end surface 23 extends so as to reach both sides where such displacement becomes large, and the reinforcing metal fitting 5 is fixed by being soldered over the entire length of the soldering portion 24. Further, the reinforcing metal fitting 5 has its L-shaped bent portion 5b abutted against the end surface of the end wall portion 4d of the housing 4 as described above, and both ends of the end wall portion 4d are pressed by the pair of L-shaped bent portions 5b. Therefore, the displacement of both shakes of the housing 4 can be suppressed in the insertion / removal operation of the other connector 31. This prevents the soldering state of the soldering portion 8 of the terminal 3 from being affected in the same manner as described above, and prevents the soldered portion of the terminal 3 from being peeled off.

  The present invention has been described with reference to the preferred embodiments. However, as those skilled in the art can easily understand, the present invention is not limited to such embodiments, and the gist of the present invention. As long as it does not deviate from the above, it can be appropriately changed. For example, although the mail (male) terminal is described in the above embodiment, the same applies to a female (female) terminal. Moreover, although it showed about the connector which has the several terminal arrange | positioned in parallel, it is applicable also to the connector of only one terminal, and when the reinforcement metal fitting 5 was attached to the both sides of the housing 4, but there are few terminals Only one side may be sufficient. In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

  The connector according to the present invention can prevent the terminal from coming off without increasing the size of the housing, and is useful as a miniaturization of the surface mount connector.

DESCRIPTION OF SYMBOLS 1 Board | substrate 2 Connector 3 Terminal 4 Housing 5 Reinforcement metal fitting 5a Flat plate part, 5b L-shaped bending part, 5c Engagement piece, 5d Second engagement piece, 5e Claw 6 Leg part 7 Projection part, 7a Base part, 7b Taper part 7c Contact part 8 Soldering part 9 Holding part, 9b Shoulder part 15 Holding groove, 15a Convex engaging part 16 Holding hole 17 Recess 19 Fixing pattern 21 L-shaped end face 22 Soldering part 23 Longitudinal U-shaped end face 24 Soldering part

Claims (2)

A connector having a plurality of terminals, and a housing for holding the state in which the terminals are arranged at predetermined intervals,
The terminal has a quadrangular cross-section shaped leg soldered to the substrate, and a quadrangular cross-section projecting section that includes a contact portion that projects in a direction orthogonal to the leg and is coupled to a terminal of another connector; Have
The leg portion includes grooves formed long in the extending direction of the leg portion on two surfaces in the arrangement direction of the terminals,
The housing includes a holding hole that holds the projecting portion, and a holding groove which is perpendicular to and communicating with the holding hole so as to receive said legs, the arrangement direction of the terminals of the inner wall surface defining said retaining groove And a convex engaging portion formed on two surfaces facing each other ,
The protrusion is inserted into the holding hole in a four-surface press-fit state,
The connector is characterized in that the leg portion is inserted into the holding groove in a press-fitted state of two surfaces in which the convex engagement portions have respectively bitten into the grooves . The protrusion extends from the base on the leg side to the side opposite to the leg side, and the protrusion is between the base and the contact part and extends from the base to the contact part. The connector according to claim 1, further comprising: a tapered portion whose thickness gradually decreases toward the head, wherein the tapered portion is inserted into the holding hole in a press-fitted state.
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