JP4863317B2 - Circuit board electrical connector - Google Patents

Description

  The present invention relates to an electrical connector attached to a circuit board.

  Many electrical connectors attached to circuit boards have a shield metal plate member attached to a housing. This connector is arranged on the circuit board, and a flat conductor is connected in a direction parallel to the surface of the circuit board from the front surface. As this type of connector, for example, a connector disclosed in Patent Document 1 is known.

  Patent Document 1 discloses a circuit board connector in which a shield plate is fitted and attached to the housing so as to cover the rear surface from the upper surface of the housing. In the connector, a terminal group including a signal terminal and a ground terminal (ground terminal) is arranged and held by the housing, and a protrusion or a claw portion formed on the shield plate is formed in a recess or hole formed in a corresponding portion of the housing. The shield plate is attached to the housing by fitting. Further, in a state where the shield plate is attached to the housing, a contact piece formed by cutting and raising a part of the shield plate that covers the upper surface of the housing or a part that covers the rear surface is in elastic contact with the ground terminal.

JP-A-11-204204

  However, in the connector of Patent Document 1, the contact piece of the shield plate is elastically contacted with the ground terminal with a large contact pressure that can ensure stable electrical continuity with the ground terminal during assembly of the connector, that is, The shield plate needs to be attached to the housing while being elastically displaced. Accordingly, since the shield plate must be attached while receiving the reaction force from the ground terminal, the position of the shield plate is likely to be shifted during assembly work, and the assembly of the connector is not easy. In recent years, connectors have been apt to be lowered in height, and shield plates are often thinned. In particular, such a thin shield plate is displaced due to the reaction force from the ground terminal during mounting. Cheap. Further, the contact pressure between the shield plate and the ground terminal may cause damage such as scraping on the shield plate and the ground terminal.

  Further, even after the connector is assembled, the contact piece of the shield plate is elastically displaced, and stress is always generated in the shield plate body. The stress is transmitted to the housing through a mounting portion between the shield plate and the housing. When the connector is heated at the time of reflow mounting on the circuit board in such a state where stress is generated in the housing, the housing is easily deformed by heat and warps. Further, the shield plate itself is also thermally deformed by being heated.

  Such deformation of the housing and the shield plate may cause an adverse effect due to excessive or insufficient contact pressure between the contact piece of the shield plate and the ground terminal.

  In view of such circumstances, the present invention makes it easy to attach the shield plate to the housing so that no stress is generated on the shield plate when not in use and after assembly. An object of the present invention is to provide an electrical connector for a circuit board in which a shield plate is hardly deformed.

An electrical connector for a circuit board according to the present invention is an electrical connector for a circuit board that is disposed on the circuit board and has a flat conductor inserted therein to electrically connect the flat conductor and the circuit board. A signal ground terminal, a metal ground terminal having a movable arm extending in the insertion / extraction direction of the flat conductor, a housing of an electrical insulator that holds a plurality of signal terminals and a terminal group including the ground terminal, and a front of the connector a movable movable member toward the closed position to increase the contact pressure between the flat type conductors and the terminals from the opened insertable to an open position the flat conductive to opening towards the, housing over the terminal arrangement range And a shield plate attached to the housing so as to cover at least a part thereof.

In such an electrical connector for a circuit board, in the present invention, the housing has an upper wall, and the rear end portion of the upper wall is located at a position corresponding to the ground terminal in a terminal arrangement direction rather than a position corresponding to the signal terminal. The shield plate has an upper shield part that covers the upper wall of the housing, and the rear shield part of the upper shield part extends over the terminal arrangement range, and the signal terminal and it extends to the position of the upper wall rear portion at a position corresponding to said movable member has a cam portion which elastically displaced by pushing the moveable arm of the ground terminal when moving to the closed position The ground terminal is characterized in that when the movable member is in the closed position, the movable arm portion that is elastically displaced by being pushed by the cam portion contacts the rear end portion of the upper shield portion of the shield plate.

  When the movable member is moved toward the closed position to increase the contact pressure between the flat conductor inserted into the connector opening and the terminal group, the movable arm portion of the ground terminal is pushed by the cam portion of the movable member. It is elastically displaced. When the movable member is in the closed position, the movable arm that is elastically displaced by being pushed by the cam portion contacts the shield plate with a large contact pressure that can stably secure electrical continuity with the shield plate. To do. In other words, when the movable member is in the open position, the movable arm portion of the ground terminal does not contact the shield plate, or the contact pressure is so small that electrical continuity with the shield plate cannot be obtained stably. And no stress is generated on the shield plate, or a very small amount of stress is generated. Normally, the movable member is in the open position when the connector is assembled. Therefore, according to the present invention, at the time of assembling the connector, the shield plate receives no reaction force from the ground terminal or only receives a minute degree, so that a large stress is not generated on the shield plate. Therefore, during the assembly operation of the connector, the shield plate is attached to the housing with almost no displacement of the shield plate.

  Further, during reflow mounting, the flat conductor is not connected to the connector, and the movable member is in the open position. Therefore, since the stress is not applied to the shield plate at all or only to a minute extent, the shield plate and the housing to which the shield plate is attached are hardly deformed by heating.

As one form of the cam part of the movable member, the cam part is located below the movable arm part of the ground terminal, and the movable arm is pushed up when the movable member moves to the closed position. The part may be elastically displaced. By adopting such a form for the cam portion, the arm portion pushed up by the cam portion and elastically displaced comes into contact with the rear end portion of the upper shield portion of the shield plate at the closed position.

  The movable arm portion of the ground terminal is preferably formed with a projecting portion at the contact portion with the shield plate. Thus, by forming the protrusion on the movable arm portion, the movable arm portion and the shield plate can be brought into contact with each other even if the elastic displacement amount of the movable arm portion is small. Further, although the contact between the arm portion of the ground terminal and the shield plate is local, the movable arm portion and the shield plate can be reliably brought into contact with each other.

  At least some of the ground terminals among the plurality of ground terminals may be integrated with the shield plate and formed as one member. By integrating the ground terminal and the shield plate, the number of parts can be reduced, and management of the parts can be facilitated, and the manufacturing cost can be reduced accordingly.

The housing has an opening that opens to the front and into which a flat conductor is inserted in a direction parallel to the circuit board. The shield plate is attached to the housing so as to cover the upper wall of the housing with the upper shield. The ground terminal extends below the movable arm portion in a direction parallel to the movable arm portion and is fixed to the housing, and connects the movable arm portion and the fixed arm portion at an intermediate position in the longitudinal direction. The movable arm portion further includes a pressing portion for pressing the flat conductor from above on the front end side with respect to the coupling portion, and the upward force from the cam portion of the movable member. And a cam portion of the movable member is located below the pressure receiving portion of the movable arm portion, and the movable arm portion is formed of the movable member. When the pressure sensor moves toward the closed position, The pressing portion is displaced downward by being pushed up and elastically displaced like a lever with the connecting portion as a fulcrum, and when the movable member is in the closed position, the pressing portion presses the flat conductor from above, The upper edge portion on the rear end side with respect to the connecting portion may be in contact with the rear end portion of the upper shield portion of the shield plate.

  As described above, in the present invention, when the movable member is in the closed position, the movable arm portion of the ground terminal has a large contact pressure enough to stably secure electrical continuity with the shield plate. When the movable member is in the open position, the movable arm portion of the ground terminal and the shield plate are not in contact with each other or are brought into contact with a minute contact pressure. The shield plate can be attached to the housing without causing a large stress, and the connector can be easily assembled.

  Further, even during reflow mounting, no great stress is generated on the shield plate, so that the shield plate and the housing to which the shield plate is attached are not deformed by heating. Therefore, a good contact state between the arm portion of the ground terminal and the shield plate can be secured when the movable member is moved to the closed position.

It is a perspective view which shows the electrical connector for circuit boards and flat conductor which concern on 1st embodiment. 1 is a cross-sectional view of the connector of FIG. 1 in which two types of signal terminals are arranged, as viewed in the terminal arrangement direction, where (A) is a position of one type of signal terminal, and (B) is a position of another type of signal terminal. It is sectioned and the movable member is shown in the open position. FIG. 2 is a cross-sectional view of the connector of FIG. 1 as viewed in the terminal arrangement direction at the position of the ground terminal, where (A) shows the movable member in the open position, and (B) shows the movable member in the closed position. ing. It is a perspective view which shows the shield board of the connector of FIG. It is sectional drawing seen in the terminal arrangement direction in the position of a ground terminal about the connector in 2nd embodiment, (A) is a state in which a movable member is an open position, (B) is a state in which a movable member is a closed position. It is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<First embodiment>
FIG. 1 is a perspective view showing a connector of one embodiment of the present invention and a flat conductor to be connected thereto.

  In FIG. 1, reference numeral 1 denotes a connector according to the present embodiment, and reference numeral F denotes a flat conductor connected to the connector 1. The connector 1 includes a housing 10 made of an electrically insulating material, a plurality of signal terminals 20 and ground terminals 30 (hereinafter collectively referred to as “terminals 20 and 30” as appropriate) made of a metal plate held by the housing 10. And a movable member 40 that presses the flat conductor F to be connected to the terminals 20 and 30, and a shield plate 50 made of a metal plate attached to the housing 10. The connector 1 is a thin connector having a height of about 1 mm.

  In the flat conductor F, for example, a corresponding circuit portion that contacts the terminals 20 and 30 is formed on the lower surface of the flexible sheet, and the reinforcing sheet F1 is formed on the upper surface of the tip portion to be inserted into the connector 1. It is attached. This flat conductor has a locking recess F2 as a locked portion for locking the locking conductor of the connector to the side edge of the portion where the reinforcing sheet F1 is provided to prevent the flat conductor from coming off. Is formed.

  The housing 10 has, for example, two types of signal terminals 20 (20A and 20B) and a ground terminal 30 that are formed while maintaining a flat plate surface of a metal plate at a predetermined interval in a direction perpendicular to the plate surface. Arrange and hold. This housing 10 shows a cross section in a plane parallel to the plate surfaces of the signal terminals 20A, 20B and the ground terminal 30 at the positions of the two kinds of signal terminals 20A, 20B and the ground terminal 30, respectively. , (B) and FIG. 3, a space penetrating in the front-rear direction (left-right direction in FIGS. 2A, 2B and 3) is formed, and the upper wall 12 and the lower wall 13 are formed. have. The upper wall 12 has a rear area (right area in FIGS. 2 (A), 2 (B) and 3) cut out to form a space 14 opened upward, and a movable member described later is formed in the space 14. 40 is arranged. In the present embodiment, the flat conductor F is received from the opening of the front side of the housing 10 (left side in FIGS. 2A and 2B and FIG. 3).

  As shown in FIGS. 2A, 2B, and 3, terminal insertion grooves 15 and 16 extending in the front-rear direction are formed on the inner surfaces of the upper wall 12 and the lower wall 13 of the housing 10, respectively. Has been. The groove widths of the terminal insertion grooves 15 and 16 (groove width in the direction perpendicular to the paper surface in FIGS. 2A and 2B and FIG. 3) are substantially the same as the plate thickness of the terminals 20 and 30. 20 and 30 can be inserted and supported. The terminal insertion grooves 15, 16 support one terminal 20, 30 with a pair of upper and lower terminal insertion grooves 15, 16 located at the same position in the terminal arrangement direction. For example, the two types of signal terminals 20A and 20B and the ground terminal 30 are arranged so that the ground terminals 30 are mixed in the arrangement of the signal terminals 20A and 20B. As seen in FIGS. 2A and 2B, one type of signal terminal 20A and another type of terminal 20B are press-fitted into the terminal insertion grooves 15 and 16 from the right and from the left, respectively. . As seen in FIG. 3, the ground terminal 30 is press-fitted from the right side into the terminal insertion grooves 15 and 16. In order to hold the terminals 20 and 30 more securely, the end portions of the lower wall 13 are thinned on the terminal insertion start side, and fixing portions 16A and 16B for fixing the terminals 20 and 30 are formed here.

  As shown in FIGS. 2A and 2B, the two types of signal terminals 20A and 20B have a horizontal H shape, and the upper arms 21A and 21B, the lower arms 22A and 22B, and a connection that connects both arms. Each has parts 23A and 23B. The upper arm portions 21A and 21B have projecting pressing portions 24A and 24B on the front end side (left end side in the drawing), and concave or immersive pressure receiving portions 25A and 25B on the rear end side. The pressure receiving portions 25A and 25B are portions that receive upward force from a cam portion of the movable member 40, which will be described later, and when receiving such force, the upper arm portions 21A and 21B support the connecting portions 23A and 23B having elasticity. As shown in FIG. 4, it is elastically displaced so as to incline, and the pressing portions 24A and 24B are displaced downward to press the flat conductor downward by the pressing portions 24A and 24B. The upper arm portion 21A of one kind of signal terminal 20A extends longer forward than the upper arm portion 21B of the other signal terminal 20B, and therefore the pressing portion 24A is positioned in front of the pressing portion 24B. On the other hand, the pressure receiving portions 25A and 25B are in the same position in the front-rear direction. Although the upper arm portions 21A and 21B are pressed against the bottom surface of the terminal insertion groove 15 at the upper edges near the connection portions 23A and 23B, the connection portions 23A and 23B are inclined at the fulcrum. As described above, a slight gap is formed between the terminal insertion groove 15 and the inner surface of the opposing groove.

  The lower arm portions 22 </ b> A and 22 </ b> B are received in the terminal insertion groove 16 of the lower wall 13. In a kind of signal terminal 20A, the lower arm portion 22A has a portion extending forward from the connecting portion 23A so as to rise on the front end side, has elasticity in the vertical direction, and has a projecting contact portion 26A at the front end. The portion extending rearward from the connecting portion 23A has a connecting portion 27A and a fixed portion 28A on the rear end side. The connecting portion 27A extends to the outside of the housing and has a lower edge in contact with the circuit board and serves for solder connection with a corresponding circuit portion of the circuit board. The fixed portion 28A is formed in a groove shape so as to form the inner edge of the connecting portion 27A and is fitted to the fixing portion 16A of the lower wall 13 of the housing 10. A locking projection 29A is formed on the upper edge of the portion between the connecting portion 27A and the connecting portion 23A, and when the cam portion of the movable member 40 rotates together with the front edge of the locking projection 29A at the front position thereof. A concave support portion 29A-1 that supports the cam portion is formed.

  In the other signal terminal 20B, the lower arm portion 22B has a connecting portion 27B and a fixed portion 28B with the front end of the portion extending forward of the connecting portion 23B outside the housing. The connecting portion 27B and the fixed portion 28B are opposite to the front terminal of the kind of terminal 20A, but the shape and function thereof are the same as those of the one signal terminal 20A. 27B is solder-connected to the circuit board, and the fixed portion 28B is fitted and fixed to the fixing portion 16B of the lower wall 13 of the housing 10. The lower arm portion 22B is provided with a projecting contact portion 26B between the connecting portion 23B and the connecting portion 27B at substantially the same position as the pressing portion 24B in the front-rear direction. Further, the lower arm portion 22B is formed with a support portion 29B that supports the cam portion when the cam portion of the movable member 40 is rotated at a straight upper edge of a portion extending rearward from the connecting portion 23B.

  In order to press the flat conductor against the contact portions 26A and 26B of the signal terminals 20A and 20B, the pressure receiving portions 25A and 25B are lifted upward so that the pressing portions 24A and 24B of the upper arms 21A and 21B are displaced downward. In this embodiment, the movable member 40 is made of the same electrical insulating material as that of the housing, and has an operation portion 41 and cam portions 42A and 42B. The movable member 40 is disposed in the space 14 at the rear part of the housing 10, and the rear parts of the upper arms 21A and 21B of the signal terminals 20A and 20B are arranged at positions corresponding to the signal terminals 20A and 20B in the terminal arrangement direction. Are formed, and island-shaped cam portions 42A and 42B are provided in the groove portions 41A and 41B so as to connect the inner wall surfaces of the grooves. In this embodiment, the cam portions 42A and 42B form a horizontally long oval island shape when the movable member 40 is in the open position of FIGS. 2A and 2B, and the cam portions 42A and 42B. The rear portions of the upper arm portions 21A and 21B are received in the groove portions 41A and 41B between the groove portions 41A and 41B and the groove bottoms 41A-1 and 41B-1. The movable member 40 is rotatable about the cam portions 42A and 42B. The movable member 40 is rotated 90 ° clockwise from the open position taking the vertically long posture shown in FIGS. A reciprocating rotation operation is received between the closed positions where the posture is taken. 2A and 2B, the movable member 40 has an operation portion 41 that extends upward from the space 14 of the housing. Receive operational force for movement. When the cam portions 42A and 42B are rotated to the closed position while being supported by the support portions 29A-1 and 29B of the signal terminals 20A and 20B, the cam portions 42A and 42B change from the horizontally long state to the vertically long state, , 20B are lifted upwards. Thus, the upper arms 21A and 21B of the signal terminals 20A and 20B are elastically displaced so as to incline in a lever-like manner with the connecting portions 23A and 23B as described above, and the flat conductors are pressed downward by the pressing portions 24A and 24B. The contact pressure between the flat conductor and the contact portions 26A and 26B of the signal terminals 20A and 20B is increased.

  As seen in FIGS. 3A and 3B, the ground terminal 30 is inserted into the terminal insertion grooves 15 and 16 of the corresponding housing 10 from the rear and is held here. The ground terminal 30 is quite similar to the signal terminal 20 </ b> A of FIG. 2A and has a horizontal H shape, and has an upper arm portion 31, a lower arm portion 32, and a connecting portion 33. Similar to the signal terminal 20A, the upper arm portion 31 is formed as a movable arm portion that can be elastically displaced, and has a pressing portion 34 on the front end side and a pressure receiving portion 35 on the rear end side. The upper arm portion 31 has a protruding contact protrusion 36 on the upper edge of the portion between the connecting portion 33 and the pressure receiving portion 35 in the front-rear direction. Similar to the signal terminal 20A, the lower arm portion 32 is formed as a fixed arm portion fixed to the housing 10, and has a ground contact portion 37 on the front end side, and a connection portion 38 and a fixed portion 38A on the rear end side. A locking projection 39 is formed on the upper edge of the portion between the connection portion 38 and the coupling portion 33, and a concave support portion 39A for supporting the cam portion of the movable member 40 is formed at the front position thereof. Has been. As shown in FIG. 3A, when the movable member 40 is in the open position, a gap is formed between the contact protrusion 36 of the ground terminal 30 and the shield plate 50, and the contact protrusion And the shield plate 50 are not in contact with each other.

  As can be seen by comparing FIG. 2 (A) with FIGS. 3 (A) and 3 (B), the upper wall 12 of the housing 10 has the rear end portion at the position of the ground terminal 30 in the terminal arrangement direction in the same direction. It is located slightly ahead of the rear end at the position of the signal terminal 20A. This is because a space for accommodating the contact protrusion 36 is provided behind the upper wall 12 as shown in FIGS. 3 (A) and 3 (B).

  In the present embodiment, the ground terminal has the connection portion and the fixed portion on the rear end side, but instead, the connection portion and the fixed portion are arranged on the front end side in the same manner as the signal terminal 20B. You may have.

  As shown in FIGS. 3A and 3B, the movable member 40 is formed with a groove portion 41C that allows the rear portion of the upper arm portion 31 to enter, and an island-shaped cam portion 42C is provided in the groove portion 41C. It has been. In the open position, the movable member 40 receives the rear portion of the upper arm portion 31 in the groove portion 41C between the cam portion 42C and the groove bottom 41C-1 of the groove portion 41C. As shown in FIG. 3A, the groove 41 </ b> C slightly widens upward on the front side in the open position, so that the movable member 40 does not interfere with the contact protrusion 36 of the ground terminal 30. The shape of the cam portion 42C is the same as the cam portions 42A and 42B of the signal terminals 20A and 20B. Thus, as shown in FIG. 3B, when the movable member 40 is rotated to the closed position, the upper arm portion 31 is inclined like a lever with the connecting portion 33 as a fulcrum, as in the case of the signal terminals 20A and 20B. Due to elastic displacement, the pressing portion 34 is displaced downward. As a result, as shown in FIG. 3B, the contact protrusion 36 of the ground terminal 30 contacts the shield plate 50, and the ground terminal 30 and the shield plate 50 are electrically connected. The contact pressure generated by the contact between the contact protrusion 36 and the shield plate 50 is at least about 0.15 to 0.5N.

  In the present embodiment, since the contact protrusion 36 is formed at the contact portion of the ground terminal 30 with the shield plate 50, the ground terminal 30 and the shield plate 50 even if the elastic displacement amount of the upper arm portion 31 of the ground terminal 30 is small. Can be contacted. Further, although the contact between the ground terminal 30 and the shield plate 50 is local, the ground terminal 30 and the shield plate 50 can be reliably brought into contact with each other.

  As shown in FIG. 4, the shield plate 50 attached to the housing 10 is made by bending a single metal plate and then bending it. The shield plate 50 includes a shield part 51 having an upper shield part 52 having a flat surface that is in close contact with the upper surface of the housing 10 and a side shield part 53 positioned on a side part of the housing 10, and the side shield part 53. From the solder fixing portion 54 and bent upward from the solder fixing portion 54 so as to be parallel to the side shield portion 53, that is, to have a plate surface parallel to the terminals 20 and 30. 55 as a single member.

  The upper shield part 52 has a rectangular flat surface, and a mounting notch 52A having semicircular and straight inner edges at the rear edge at the center in the longitudinal direction (terminal arrangement direction). The attachment notch 52A is formed in a small area which is smaller than the width of the upper shield part 52 in the front-rear direction and does not reduce the strength of the upper shield part 52 or the shield effect. A locking projection 52A-1 is provided on the straight inner edge that forms the rear portion of the attachment notch 52A.

  The side shield part 53 has a front part 53A connected to a part of the side end of the upper shield part 52 in the front-rear direction, and a rear part 53B extending rearward therefrom. The front portion 53A is bent at the boundary with the upper shield portion 52 and extends downward. The rear portion 53B is formed by extending the surface of the front portion 53A rearward as it is and has an arm shape. A notch groove 53A-1 is formed at the lower edge of the front portion 53A, and a rear part of the notch groove 53A-1 is bent inward in the terminal arrangement direction, and a portion of a plane parallel to the upper shield part 52 A solder fixing portion 54 is formed. The bottom surface of the solder fixing portion 54 can come into contact with the surface of the circuit board, and is soldered to the corresponding portion of the circuit board. The front portion 53A has a leg portion 53A-2 that is flush with the rear portion 53B at the lower edge portion in front of the cut groove 53A-1. The leg 53A-2 has a lower edge positioned on the circuit board, and forms another solder fixing portion for assisting in fixing to the circuit board in the same manner as the solder fixing portion 54. Only one of the solder fixing part 54 and the leg part 53A-2 may be fixed to the circuit board by solder. In the rear portion 53B of the side shield portion 53, the lower edge on the rear end side is cut out in a step shape to form a shaft support portion 53B-1. When the later-described movable member 40 has rotating shafts at both ends of the terminal arrangement direction, the shaft supporting portion 53B-1 accommodates the rotating shaft in the shaft supporting portion 53B-1 and rotates it. Dynamic support.

  The locking portion 55 is connected to the solder fixing portion 54 through the bent region at the lower edge portion on the front end side, and a lock protrusion 56 protruding upward is formed at the upper edge. The locking projection 56 enters a locking recess F2 as a locked portion formed on the flat conductor F connected to the connector 1 shown in FIG. 1 to prevent the flat conductor F from coming off. Is to do.

  From the viewpoint of attaching the shield plate 50, the housing 10 will be described again. As shown in FIG. 1, the housing 10 has a projection 18 for locking the shield plate holding groove 17 into which the locking portion 55 of the shield plate 50 is inserted and the mounting notch 52 </ b> A of the upper shield portion 52. And have.

  The shield plate holding groove 17 is located outside the terminal arrangement range, in other words, outside the range where the terminal insertion grooves 15 and 16 are formed, and the plate of the terminals 20 and 30 held by the terminal insertion grooves 15 and 16. It is formed so that the plate surface of the locking portion 55 is positioned on a parallel surface. The protrusion 18 provided on the upper surface of the housing 10 is provided at a position where the attachment notch 52A of the shield plate 50 is fitted when the shield plate 50 is attached to the housing 10 from the front. A locking projection 52A-1 formed on the inner edge of the portion 52A bites into the side surface of the projection 18. Thus, the upper shield part 52 that is long in the terminal arrangement direction is prevented from floating upward from the upper surface of the housing 10.

  When the shield plate 50 is attached to the housing 10, the locking portion 55 is inserted into the shield plate holding groove 17 of the housing 10 from the front and is held here.

  Such a connector of this embodiment is used and functions in the following manner.

  (1) First, when assembling the connector, the signal terminal 20A shown in FIG. 2 (A) is inserted into the terminal insertion grooves 15 and 16 from the right side with the movable member 40 and the shield plate 50 not attached. The fixed portion 28A is fixed to the fixed portion 16A of the housing 10, and the signal terminal 20B shown in FIG. 2B is inserted into the terminal insertion grooves 15 and 16 from the left side, and the fixed portion 28B is used to fix the housing 10 to the fixed portion. Fix to 16B. Further, the ground terminal 30 shown in FIG. 3 is inserted into the terminal insertion grooves 15 and 16 from the right side and fixed to the fixing portion 16A of the housing 10 by the fixed portion 38A. In the present embodiment, the terminals 20 and 30 are arranged so that the ground terminals 30 are mixed in the arrangement of the signal terminals 20A and 20B. However, the terminals 20 and 30 may be arranged in a different order according to requirements. .

  (2) Next, the movable member 40 is attached from the rear in the open position shown in FIGS. 2 (A), 2 (B) and 3 (A). The cam portions 42A, 42B, 42C of the movable member 40 are positioned in contact with the support portions 29A-1, 29B, 39A of the terminals 20, 30.

  (3) After that, the shield plate 50 is attached to the housing 10 from the front. The upper shield part 52 and the side shield part 53 that constitute the shield part 51 of the shield plate 50 are positioned in contact with the upper surface and the side surface of the housing 10, respectively, and the locking part 55 is inserted into the shield plate holding groove 17. The The upper shield part 52 has an attachment notch 52A fitted into the protrusion 18 on the upper surface of the housing 10, and the locking protrusion 52A-1 at the inner edge of the attachment notch 52A bites into the side surface of the protrusion 18 to The position of the shield part 52 is firmly fixed. On the other hand, the engaging portion 55 inserted into the shield plate holding groove 17 is press-fitted and held in the shield plate holding groove 17.

  When the shield plate 50 is attached to the housing 10, the movable member 40 is in the open position, and the upper arm portion 31 of the ground terminal 30 is not lifted by the cam portion 42 </ b> C of the movable member 40. Therefore, when the shield plate 50 is attached, the contact protrusion 36 formed on the upper edge of the upper arm portion 31 does not contact the shield plate 40, and no stress is generated on the shield plate 50.

  (4) The connector 1 assembled in this way is arranged on a predetermined circuit board in use. When the connector 1 is arranged on the circuit board, the connection parts 27A, 27B, and 38 of the terminals 20 and 30, the solder fixing part 54 of the shield plate 50, and the leg part 53A-2 are in contact with the corresponding parts of the circuit board. Face. Thereafter, soldering with the corresponding part is performed, the signal terminals 20A and 20B are electrically connected and fixed to the corresponding circuit, and the ground terminal 30 is grounded and fixed with the corresponding circuit part, and the shield plate The 50 solder fixing portions 54 and the leg portions 53A-2 are fixed to the circuit board.

  (5) Thereafter, the flat conductor F shown in FIG. 1 is inserted into the connector 1 and the movable member 40 is rotated to the closed position. By turning to the closed position, the cam portions 42A, 42B, 42C of the movable member 40 are in a vertically long state, and the pressure receiving portions 25A, 25B of the signal terminals 20A, 20B and the pressure receiving portion 35 of the ground terminal 30 are pressed upward. According to the above-described lever principle, the upper arms 21A and 21B of the signal terminals 20A and 20B and the upper arm 31 of the ground terminal 30 are inclined so that the pressing portions 24A, 24B and 34 at the front ends are displaced downward, and these pressing portions 24A. , 24B, 34 press the flat conductor F downward. The flat conductor F pressed downward increases the contact pressure with the contact portions 26A and 26B of the signal terminals 20A and 20B and the ground contact portion 37 of the ground terminal 30. Further, when the movable member 40 is turned to the closed position, the upper arm portion 31 of the ground terminal 30 is lifted by the pressure receiving portion 35 by the cam portion 42C of the movable member 40, so that when the movable member 40 is in the closed position, FIG. As shown in (B), the contact protrusion 36 of the upper arm 31 contacts the shield plate 50. Further, the locking protrusion 56 of the locking portion 55 enters the locking recess F2 of the flat conductor F, and the flat conductor F is prevented from coming off.

  In the connector 1 according to the present embodiment, since the ground terminal 30 and the shield plate 50 do not contact when the movable member 40 is in the open position, the shield plate 50 is attached when the shield plate 50 is attached to the housing 10 during connector assembly. 50 does not receive a reaction force from the ground terminal 30, and no stress is generated on the shield plate 50. Therefore, the position of the shield plate 50 does not shift during the assembly operation, and the shield plate 50 can be attached and the connector 1 can be easily assembled. Further, since the ground terminal 30 and the shield plate 50 do not come into contact with each other, it is possible to avoid the ground terminal 30 and the shield plate 50 from being damaged due to shaving or the like during the assembly operation.

  Further, after the connector 1 is assembled, when the connector 1 is reflow-mounted on the circuit board, the flat conductor F is not connected to the connector 1 and the movable member 40 is in the open position. Accordingly, since the ground terminal 30 is not in contact with the shield plate 50 at the time of the reflow mounting, no stress is generated on the shield plate 50. As a result, the shield plate 50 and the housing to which the shield plate 50 is attached are provided. 10 is not deformed by heating. Therefore, when the connector 1 and the flat conductor F are connected, that is, when the movable member 40 is moved to the closed position, a good contact state between the ground terminal 30 and the shield plate 50 can be secured.

  In this embodiment, the contact protrusion is provided at the contact portion of the ground terminal with the shield plate. However, when the elastic displacement amount of the upper arm portion of the ground terminal can be sufficiently secured, the contact protrusion is provided at the contact portion. Instead, the upper edge of the upper arm portion of the ground terminal may be in contact with the shield plate.

  In addition, the rear end portion of the shield plate at the position of the ground terminal in the terminal arrangement direction, that is, the portion extending rearward from the rear end portion of the upper wall of the housing is bent downward to make contact with the ground terminal. May be formed so that the contact portion and the ground terminal are in contact with each other. In this case, if the contact state between the contact portion and the ground terminal can be ensured when the movable member is in the open position, the contact protrusion may or may not be provided on the ground terminal. .

  In this embodiment, the ground terminal and the shield plate are formed as separate members. However, as a modification, at least some of the ground terminals and the shield plate may be integrally formed as a single member. Good. For example, the portion of the shield plate where the locking portion is provided is formed in a shape in which the ground terminal and the lock protrusion are integrated, and the function of preventing the flat conductor from coming off by the lock protrusion and the grounding by the ground terminal. It is possible to have both functions. Thus, by forming the ground terminal and the shield plate integrally as a single member, the number of components can be reduced, and the management of the components can be facilitated, and the manufacturing cost can be reduced accordingly. In such a modification, among the plurality of ground terminals, ground terminals that are not integrated with the shield plate are provided so as to be mixed in the arrangement of signal terminals, as in the above-described embodiment.

  In this embodiment, when the connector is assembled and when the movable member is in the open position, the ground terminal and the shield terminal are not in contact with each other, but instead of this, electrical continuity cannot be stably obtained. The ground terminal and the shield terminal may be in contact with each other with a slight contact pressure. As described above, even if a slight contact pressure is generated, the position of the shield plate is hardly shifted during the assembly of the connector. Further, since the stress is applied to the shield plate only to a minute extent, the shield plate and the housing to which the shield plate is attached are hardly deformed by heating during reflow mounting.

  In this embodiment, the signal terminal and the ground terminal are so-called press punched terminals formed by maintaining a flat plate surface of the metal plate, but instead, the plate surface is bent to provide elasticity. A signal terminal and a ground terminal may be formed as so-called bending terminals.

  In the present embodiment, the electrical connection between the flat conductor F and the signal terminals 20A and 20B is performed by connecting the corresponding circuit portion provided on the lower surface of the flat conductor F and the contact portions 26A and 26B of the signal terminals 20A and 20B. However, the form of connection is not limited to this.

  For example, a corresponding circuit portion may be provided on the upper surface of the flat conductor F, and the corresponding circuit portion may be contacted with the pressing portions 24A and 24B of the signal terminals 20A and 20B (hereinafter referred to as “upper contact connection”). Further, corresponding circuit portions may be provided on the upper surface and the lower surface of the flat conductor F, and both the upper contact connection and the lower contact connection may be used. Further, the upper contact connection and the lower contact connection may be alternately made in the terminal arrangement direction.

  In the present embodiment, the connector 1 is assembled by attaching the signal terminal 20A, the ground terminal 30, the movable member 40, the signal terminal 20B, and the shield plate 50 in this order, but the assembly order of the connector 1 is not limited to this. .

  For example, the connector 1 may be assembled in the order of the movable member 40, the signal terminal 20B, and the shield plate 50 after the signal terminal 20A and the ground terminal 30 are attached at the same time. You may carry out in order of the ground terminal 30, the movable member 40, and the signal terminal 20B.

  In the connector according to this embodiment, the flat conductor is inserted in a direction parallel to the circuit board. However, the connector to which the present invention is applied is not limited to this, and for example, the housing has an opening that opens upward. In addition, a so-called vertical (vertical type) connector in which the flat conductor is inserted into the opening from above in a direction perpendicular to the circuit board may be used.

<Second embodiment>
In the connector described in the first embodiment, the signal terminal and the ground terminal have an upper arm portion and a lower arm portion, and both arm portions are connected by a connecting portion at an intermediate position in the longitudinal direction, and are located in front of the connecting portion. A so-called back flip that accepts a flat conductor between both arms and presses the flat conductor against the front arm of the lower arm at the front end of the upper arm by tilting the upper arm by the action of a movable member behind the connecting part. It was a type of connector that could be attached to a connector having a type terminal. On the other hand, this embodiment shows that the present invention can also be applied as a connector having a front flip type terminal. The connector according to the present embodiment is different from the connector according to the first embodiment in that the shape of the terminal and the movable member are rotatably provided on the front end side. Therefore, the connector and the movable member will be mainly described. .

  5A and 5B are cross-sectional views at the position of the ground terminal of the connector according to the present embodiment, in which FIG. 5A shows a state in which the movable member is in the open position and FIG. 5B shows a state in which the movable member is in the closed position. The connector according to the present embodiment includes a housing 60, a signal terminal (not shown), a ground terminal 70, a movable member 80, and a shield plate 90.

  The housing 60 has a rear wall 61 and a lower wall 62 in the terminal arrangement range. A region in front of the rear wall forms a space 63 opened upward, and a movable member 80 is disposed in the space 63. An L-shaped terminal insertion groove 64 extending in a direction perpendicular to the terminal arrangement direction is formed on the inner surfaces of the rear wall 61 and the lower wall 62. The rear wall 61 is formed with a hole portion 65 penetrating in the front-rear direction in the lower portion. A shield plate 90 that covers the upper surface of the housing 60 is attached to the housing 60.

  The ground terminal 70 includes an upper arm portion 71, a lower arm portion 72, and a connecting portion 73 that connects both arm portions. Unlike the first embodiment, the connecting portion 73 connects the upper arm portion 71 and the lower arm portion 72 at the rear portion of both. The upper arm portion 71 has an inverted U-shaped rotation guide portion 71A that rotates and guides the shaft portion of the movable member 80 on the front end side, and a contact protrusion 71B that protrudes from the upper edge at an intermediate position in the front-rear direction. ing. The lower arm portion 72 has a connecting portion 72A and a fixed portion 72B on the front end side. Further, the ground terminal 70 has a flexible branch arm portion 72 </ b> D that branches from the base portion 72 </ b> C connected to the connection portion 73 in the lower arm portion 72 and extends forward. The front end of the branch arm portion 72D is located behind the rotation guide portion 71A of the upper arm portion 71, and a contact portion 72E protruding upward is formed at the front end. Further, a protrusion 72F extending backward from the base 72C into the hole 65 of the housing 60 is provided, and a protrusion-like press-fitting biting into the inner wall surface of the hole 65 is provided at the upper edge of the protrusion 72F. A portion 72F-1 is formed.

  The ground terminal 70 is press-fitted into the terminal holding groove 64 of the housing 60 from the left side, and the lower arm portion 72 and the connecting portion 73 are supported by the terminal holding groove. The fixed portion 72B is fitted to the thin left end portion of the lower wall 62, and the protruding portion 72F of the ground terminal 70 is press-fitted into the hole 65 of the housing 60, and the press-fit portion 72F is inserted into the inner wall surface of the hole 65. When the -1 bites in, the ground terminal 70 is more reliably held. 5A, in the state where the movable member 80 is in the open position, the contact protrusion 71B is positioned with a gap between the shield plate 90 and the shield plate 90. There is no contact.

  In the present embodiment, the ground terminal is provided with the connecting portion and the fixed portion on the front end side. Instead, the connecting portion and the fixed portion extend out of the housing on the rear end side. It may be provided.

  A signal terminal (not shown) in the present embodiment has substantially the same shape as the ground terminal 70 and is different from the ground terminal 70 in that no contact protrusion is formed on the upper arm.

  In the present embodiment, the signal terminals and the ground terminals 70 are arranged so that the ground terminals 70 are mixed in the arrangement of the signal terminals, for example.

  The movable member 80 has the same basic structure as the movable member 40 in the first embodiment, and has an operation portion 81 that receives an operation force for rotation and a shaft portion 82 that is positioned at the rotation center. ing. The movable member 80 is disposed in the space 63 of the housing 60, and is rotated by about 90 ° counterclockwise from the open position taking the vertically long posture shown in FIGS. It is rotatable around the shaft portion 82 between the closed positions. 5A and 5B, the movable member 40 has an operation portion 81 that extends upward from the space 63 of the housing, and the operation portion 81 rotates. Receive operational force for movement.

  The movable member 80 has slit-shaped grooves 81A that allow the rotation support portion 71A of the upper arm portion 71 of the ground terminal 70 to enter at positions corresponding to the ground terminals 70 in the terminal arrangement direction. An island-shaped shaft portion 82 is provided in the groove portion 81A so as to connect the inner wall surface of the groove. The cross section perpendicular to the terminal arrangement direction of the shaft portion 82 has a shape in which a circular lower portion is notched in a state where the movable member 80 is in the open position, which is good in FIGS. 5 (A) and 5 (B). As can be seen, the ground terminal 70 rotates while being guided by the rotation guide part 71A. Further, the movable member 80 is also formed with slit-like grooves that allow the rotation support portions of the upper arms of the signal terminals to enter the positions corresponding to the signal terminals in the terminal arrangement direction. An island-shaped shaft portion is provided so as to connect the inner wall surface of the groove.

  When the movable member 80 rotates toward the closed position, the movable member 80 presses the flat conductor F downward with the maximum contact pressure at the corner 81B of the movable member 80 during the rotation. The shaft portion 82 pushes the rotation guide portion 71A of the ground terminal 70 upward by the reaction force from the mold conductor F. As a result, the upper arm 71 of the ground terminal 70 is elastically deformed upward, and the contact protrusion 71B formed on the upper edge of the upper arm 71 comes into contact with the shield plate 90. Further, when the movable member 80 rotates to reach the closed position, the pressing of the flat conductor at the maximum contact pressure by the corner portion 81B is released, but as shown in FIG. The state where the flat conductor is pressed with contact pressure by the lower surface of the movable member 80 in FIG. 5B is maintained, so that the contact protrusion 71B of the upper arm 71 contacts the shield plate 90 and the ground terminal 70. The state where the shield plate 90 is electrically connected is maintained.

  Also in the connector 1 ′ according to the present embodiment, when the movable member 80 is in the open position, the ground terminal 70 and the shield plate 90 do not come into contact with each other. The shield plate 90 can be attached and the connector 1 'can be easily assembled. Further, even when the connector 1 'is reflow-mounted on the circuit board, no stress is generated on the shield plate 90, and the shield plate 90 and the housing 60 are not deformed by heating. Therefore, when the connector 1 ′ and the flat conductor F are connected, that is, when the movable member 80 is moved to the closed position, a good contact state between the ground terminal 70 and the shield plate 90 can be ensured.

  Also in the present embodiment, it is possible to apply the modification described in the first embodiment.

1, 1 'connector 34 pressing part 10, 60 housing 35 pressure receiving part 20, 20A, 20B signal terminal 36, 71B contact protrusion 30, 70 ground terminal 40, 80 movable member 31, 71 upper arm part (movable arm part) 42C cam Part 32, 72 Lower arm part (fixed arm part) 50, 90 Shield plate 33, 73 Connecting part

Claims (5)

An electrical connector for a circuit board that is arranged on a circuit board and has a flat conductor inserted therein to electrically connect the flat conductor and the circuit board, wherein the metal signal terminal and the insertion direction of the flat conductor A metal ground terminal having a movable arm portion extending in the direction, a housing of an electrical insulator that holds an array of terminals including a plurality of signal terminals and a ground terminal, and a flat conductor to an opening opening forward of the connector A movable member that can be moved from an open position where the flat conductor can be inserted to a closed position that increases the contact pressure between the terminal group and the housing, and is attached to the housing so as to cover at least a part of the housing over the terminal arrangement range. A circuit board electrical connector comprising:
The housing has an upper wall, and the rear end portion of the upper wall is positioned forward in the terminal arrangement direction at a position corresponding to the ground terminal rather than a position corresponding to the signal terminal. Has an upper shield portion that covers the upper wall of the housing, and the upper shield portion has a rear end portion of the upper shield portion at a position corresponding to a signal terminal over a terminal arrangement range. and it extends to a position, the movable member has a cam portion which elastically displaced by pushing the moveable arm of the ground terminal at the time of moving to the closed position, the ground terminals, to the movable member is in the closed position The circuit board electrical connector according to claim 1, wherein the movable arm portion elastically displaced by being pushed by the cam portion contacts the rear end portion of the upper shield portion of the shield plate.   The cam portion of the movable member is located below the movable arm portion of the ground terminal, and when the movable member moves to the closed position, the movable arm portion is pushed up to elastically displace the movable arm portion. The electrical connector for circuit boards according to claim 1. The circuit board electrical connector according to claim 1, wherein the movable arm portion of the ground terminal is formed with a projecting portion in contact with the rear end portion of the upper shield portion of the shield plate.   4. The circuit board electrical circuit according to claim 1, wherein at least some of the ground terminals are integrally formed with the shield plate as one member. 5. connector. The housing has an opening that opens to the front and into which a flat conductor is inserted in a direction parallel to the circuit board. The shield plate is attached to the housing so as to cover the upper wall of the housing with the upper shield. The ground terminal extends below the movable arm portion in a direction parallel to the movable arm portion and is fixed to the housing, and connects the movable arm portion and the fixed arm portion at an intermediate position in the longitudinal direction. The movable arm portion further includes a pressing portion for pressing the flat conductor from above on the front end side with respect to the coupling portion, and the upward force from the cam portion of the movable member. And a cam portion of the movable member is located below the pressure receiving portion of the movable arm portion, and the movable arm portion is formed of the movable member. When the pressure sensor moves toward the closed position, The pressing portion is displaced downward by being pushed up and elastically displaced like a lever with the connecting portion as a fulcrum, and when the movable member is in the closed position, the pressing portion presses the flat conductor from above, 5. The circuit board electrical connector according to claim 1, wherein an upper edge portion on the rear end side with respect to the connecting portion is in contact with a rear end portion of the upper shield portion of the shield plate. 6.

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