JP2011134565A - Electrical connector, and electrical connector assembly - Google Patents

Abstract

An object of the present invention is to provide an electrical connector and an electrical connector assembly in which a lever does not move carelessly.
An arm portion 60 extending downward (to the other surface side of the plug housing 31) is provided at the other end portion 40b of the lever 40, and the arm portion 60 is elastic like a plate-like or beam-like spring. An elastically deformable piece 61 that deforms is provided. The elastic deformation piece 61 has a locking piece 65 extending downward from the fulcrum part 61 a, and a locking claw 65 a is formed at the tip of the locking piece 65. The plug housing 31 is formed with an engaging projection 66 that engages with the locking claw 65a. By engaging these locking claws 65 a with the engaging protrusions 66, the lever 40 can be temporarily locked to the plug housing 31 in a state where the plug housing 31 is not fitted into the receptacle housing 21.
[Selection] Figure 7

Description

  The present invention relates to an electrical connector and an electrical connector assembly.

  2. Description of the Related Art Conventionally, an electrical connector (hereinafter simply referred to as a connector) that is mounted on a circuit board (hereinafter simply referred to as a board) such as a printed wiring board and connects the board and another electrical circuit has been widely used. This connector mainly includes a contact and a housing that holds the contact. The connector includes a female receptacle connector and a male plug connector. The receptacle connector has a cylindrical hood, and a plurality of contacts are arranged in the hood. The plug connector has a housing that is inserted into the hood, and contacts that fit into the contacts of the receptacle connector are provided in the housing.

In order to reduce the insertion force when the plug connector is fitted to the receptacle connector, a connector with a lever has been conventionally provided (for example, see Patent Documents 1 and 2).
The connector with the lever is provided so that the lever can rotate with respect to the plug connector. When the operator manually rotates the tip side (the side away from the fulcrum) of the lever, the working point provided in the vicinity of the fulcrum of the lever can be moved between the receptacle connector and the plug connector. A force in the direction of approaching or separating (this force is referred to as a boost) is applied. The receptacle connector and the plug connector can be inserted and removed with a lighter force by the boosting force generated by the lever.

Japanese Patent Laid-Open No. 11-307172 JP 2000-228246 A

By the way, such a plug connector with a lever is not inserted into the receptacle connector, and if the lever is moved carelessly, the lever will move around when the plug connector is fitted to the receptacle connector or during transportation. There is a possibility of being caught by the goods. As a result, the lever may be damaged or entangled with surrounding wiring or the like.
The present invention has been made based on such a technical problem, and an object thereof is to provide an electrical connector and an electrical connector assembly in which a lever does not move carelessly.

For this purpose, the electrical connector according to the present invention includes a housing, a contact held by the housing, a lever provided on one surface side of the housing, and one end of which is rotatably connected to the housing via a support shaft. The lever includes an extending portion extending along the longitudinal direction of the housing from one end portion toward the other end portion, and an arm portion extending from the extending portion toward the other surface side of the housing at the other end portion of the lever. The arm portion is provided with an engaging portion that engages with the housing in a state where the extending portion is along one side of the housing.
Such a lever is for reducing the fitting force when the housing is fitted to the housing of another electrical connector to be fitted by the lever principle. And since a lever can be engaged with a housing in the state which extended | stretched the part along the one surface side of the housing with an engaging part, the lever can be maintained in the fall state.

  The electrical connector is provided on the arm portion via a fulcrum, and extends along the side surface of the housing along the side surface of the housing with respect to the fulcrum. The housing extends along the side surface of the housing with respect to the fulcrum. And a second extension part formed with an engagement part, and the first extension part and the second extension part are elastically deformed in a direction perpendicular to the side surface of the housing. Possible elastic deformation pieces can be further provided.

  The present invention also includes a first housing, a second housing that fits into the first housing, a first contact that is held by the first housing, and a second housing that holds the first housing. A second contact connected to the first contact, wherein the first housing may be an electrical connector assembly including a hood forming a space for receiving the second housing. In this electrical connector assembly, one end of the second electrical connector assembly is pivotally connected to the second housing via a support shaft to reduce the insertion force of the second housing into the hood. Provided with a lever. The lever includes an extending portion extending along the longitudinal direction of the second housing toward the other end portion of the lever, and an arm extending from the extending portion toward the other surface side of the second housing at the other end portion of the lever. It is made into the substantially L shape formed from the part. The arm portion includes a first engagement portion that engages with the second housing in a state where the extending portion is along one surface side of the second housing, and the second housing within the hood of the first housing. And a second engagement portion that engages with the first housing inside the hood in the inserted state.

The first engagement portion and the second engagement portion may be realized by any configuration. However, the arm portion, along the side surface of the second housing, in a direction perpendicular to the side surface of the second housing. It is preferable that an elastically deformable elastic deformation piece is provided, and the first engagement portion and the second engagement portion are formed on the elastic deformation piece.
Further, the elastic deformation piece is provided on the arm portion via a fulcrum, and a first extension extending to one side with respect to the fulcrum, and a second extension extending to the other side with respect to the fulcrum It is preferable that the first engaging portion is provided in the second extending portion and the second engaging portion is formed in the first extending portion.
Moreover, it is preferable that the 1st extension part of an elastic deformation piece protrudes from a hood in the state which inserted the 2nd housing in the hood of the 1st housing.
Thereby, by pressing the first extension part protruding from the hood toward the second housing side, the second extension part in which the second engagement part is formed is separated from the second housing, The engagement with the second housing by the second engaging portion can be released.

  When a plurality of hoods are provided in the first housing and a plurality of second housings are inserted into the plurality of hoods, a plurality of hoods are inserted in the plurality of hoods in a state where the plurality of second housings are inserted. It is preferable that the elastic deformation piece in the second housing is provided on one side with respect to the first housing.

  According to the present invention, since the lever can be maintained in the tilted state by engaging the lever with the housing, the lever can be prevented from moving carelessly. Accordingly, it is possible to prevent the lever from being caught by surrounding parts or articles when the plug connector is fitted to the receptacle connector or during transportation.

It is a perspective view which shows the electrical connector assembly in this Embodiment. It is the perspective view which looked at the electrical connector assembly from the angle different from FIG. It is a perspective view which shows a receptacle connector. It is a figure which shows a plug connector, Comprising: It is a figure which shows the state which raised the lever and was locked. It is a perspective view of the plug connector in the state shown in FIG. (A) is sectional drawing along the centerline of the plug connector in the state shown in FIG. 4, (b) is the figure which looked at the plug connector in the state shown in FIG. 4 from the other end side of the lever. It is a figure which shows the state which fell and temporarily latched the lever of a plug connector, (a) is a side view, (b) is AA sectional drawing of (a). It is sectional drawing in the state which fitted the plug connector to the receptacle connector. It is a figure which shows a state when inserting a plug connector into a receptacle connector, (a) is a sectional side view, (b) is sectional drawing which shows the part which locked the lever. It is a figure which shows the state which further inserted the plug connector in the receptacle connector from the state of FIG. 9, (a) is a sectional side view, (b) is sectional drawing which shows the part which locked the lever.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
As shown in FIGS. 1 and 2, the electrical connector assembly 10 includes a receptacle connector 20 that is fixed to the printed wiring board side, and a plug connector 30 that can be fitted to the receptacle connector 20.

  In the present embodiment, for example, three plug connectors 30A, 30B, and 30C are fitted in the receptacle connector 20 in one direction. It should be noted that the number of plug connectors 30 that are fitted to the receptacle connector 20 is not intended to be limited in the present invention, and may be one, two, four, or more. In the following description, the plug connectors 30A, 30B, and 30C are simply referred to as the plug connector 30 unless they are particularly distinguished from each other, and the description thereof is common.

  The receptacle connector 20 includes a resin-made receptacle housing (first housing) 21 and contacts (first contacts) 22 formed of a conductive material such as a copper-based material.

  As shown in FIG. 3, the receptacle housing 21 is provided with a contact holding wall 23 that holds a plurality of contacts 22 in a state of being arranged at intervals. On one surface side of the contact holding wall 23, a hood 26 to which the plug connector 30 is fitted is provided. The hood 26 has a rectangular cylindrical shape that rises from the contact holding wall 23, and the inside thereof serves as a receiving space 27 for inserting the plug connector 30. In the present embodiment, the receiving space 27 is divided into three by the partition wall 28, and the three receiving spaces 27 receive insertion / fitting of the three plug connectors 30A, 30B, 30C.

  The contact holding wall 23 is formed with a through-hole penetrating the hood 26 for holding the plurality of contacts 22 in a state of being spaced apart from each other.

  As shown in FIGS. 4 and 5, the plug connector 30 includes a resin plug housing (housing, second housing) 31 that fits in the hood 26 of the receptacle housing 21 and a conductive material such as a copper alloy. It is comprised from the contact (2nd contact) 33 which consists of.

  As shown in FIG. 4, the plug housing 31 has a cross-sectional shape that fits into the receiving space 27 of the receptacle housing 21. As shown in FIG. 6, a plurality of contact holding holes 32 are formed in the plug housing 31 at intervals with respect to the plurality of contacts 22 of the receptacle connector 20. A contact 33 is held in each of the contact holding holes 32.

  An electric wire (not shown) is inserted into the contact holding hole 32 opened on the upper surface (one surface side) 31 a of the plug housing 31. This electric wire (not shown) is electrically connected to the contact 33 in the contact holding hole 32. These electric wires connected to the plurality of contacts 33 are bundled to form a wire harness 100, orthogonal to the insertion / extraction direction of the plug connector 30 with respect to the receptacle connector 20, and the longitudinal direction of the plug housing 31 (the longitudinal direction of the lever 40). : Wired in the left-right direction in FIG.

  Such a plug connector 30 is fitted to the receptacle connector 20 by inserting the plug housing 31 into the receiving space 27 of the receptacle housing 21. Then, the contact 33 on the plug connector 30 side is electrically connected to the contact 22 located in the hood 26 of the receptacle housing 21.

  As shown in FIG. 4, in order to reduce the force required when the plug housing 31 is inserted into and removed from the receptacle housing 21, the lever 40 rotates on one end 40 a side on the upper surface 31 a side of the plug housing 31. It is freely supported and provided. When the plug housing 31 is inserted into and removed from the receptacle housing 21, the lever 40 is rotated.

  The lever 40 is rotatably connected to a support shaft 41 provided on the side surface of the plug housing 31 on the one end 40a side. The support shaft 41 is offset from the center of the plug housing 31 toward the one end 40 a side.

The lever 40 has an extending portion 42 extending from the one end portion 40a toward the other end portion 40b. The extending portion 42 has a beam shape of a truss structure and is formed on the upper surface 31a side of the plug housing 31 along the side surfaces on both sides when the lever 40 is brought into the engaged state.
As shown in FIG. 4, in the extending portion 42 of the lever 40, a thin plate-like side plate 42 p is formed at portions along the side surfaces on both sides of the plug housing 31. The support shaft 41 is inserted into a hole formed in the side plate 42p.

In the side plate 42p, a cam projection 55 is formed so as to project the operating force to the receptacle housing 21 when the lever 40 is rotated to a position projecting toward the one end 40a side of the lever 40 from the support shaft 41. Has been.
On the other hand, as shown in FIG. 3, a cam groove 56 that guides the cam protrusion 55 is formed in the hood 26 of the receptacle housing 21. The cam groove 56 is formed downward from the upper end portion of the hood 26, and the cam protrusion 55 moves along the cam groove 56 when the lever 40 is rotated. At this time, when the plug housing 31 is inserted into the hood 26 of the receptacle housing 21 with the lever 40 raised, the cam protrusion 55 enters the cam groove 56. When the lever 40 is pushed down by pushing the other end 40 b of the lever 40, the cam protrusion 55 is displaced along the cam groove 56. At this time, the operating force input to the other end portion 40b of the lever 40 acts between the cam projection 55 and the cam groove 56 according to the lever principle, whereby the plug housing 31 is inserted into and removed from the receptacle housing 21. The Therefore, the cam groove 56 is formed in an appropriate shape that exhibits a boosting force for inserting and removing the plug housing 31 into and from the receptacle housing 21.

Further, as shown in FIG. 7, a stopper portion 44 is formed at the tip end portion of the side plate 42 p at a position protruding from the support shaft 41 toward the one end portion 40 a of the lever 40.
The plug housing 31 is formed with a slit 45 having a predetermined length into which a stopper portion 44 that moves up and down when the lever 40 is rotated. When the lever 40 is raised, the stopper portion 44 hits the end of the slit 45, and further movement, that is, the raising angle of the lever 40 is restricted.

  As shown in FIG. 4, the other end portion 40 b of the lever 40 is provided with an arm portion 60 that extends downward (from the other surface side of the plug housing 31) from the extending portion 42. Thereby, as for the lever 40, the extending | stretching part 42 and the arm part 60 are substantially L-shaped via the other end part 40b.

The arm portion 60 located on one side of the plug housing 31 is provided with a lever when the plug housing 31 is inserted into the hood 26 of the receptacle housing 21 and the lever 40 is tilted as shown in FIGS. 40 has a function of engaging the receptacle housing 21.
As shown in FIG. 8, the arm portion 60 is provided with a lower fulcrum portion 61a fixed to the lever 40 and an elastic deformation piece 61 extending upward from the fulcrum portion 61a. The elastic deformation piece 61 is formed in the arm portion 60 so as to face one side of the hood 26 in the short direction. The elastic deformation piece 61 is formed of a flexible resin material. When the upper end portion (first extension portion) 61b of the elastic deformation piece 61 is pressed, a plate-like or beam-like spring is formed. It is elastically deformed, and the upper end 61 b side is displaced in the short direction of the hood 26 with the fulcrum 61 a side as the center.
The elastic deformation piece 61 is provided with an engaging claw (second engaging portion) 63 at a position facing the inner peripheral surface of the hood 26. The engaging claw 63 approaches and separates from the inner peripheral surface of the hood 26 due to the displacement of the elastic deformation piece 61 in the above direction.

  On the other hand, on the inner peripheral surface of the hood 26 of the receptacle housing 21, an engagement recess (which engages with the engagement claw 63 at a position facing the engagement claw 63 when the plug connector 30 is fitted to the hood 26). (Second engaging portion) 64 is formed.

As shown in FIG. 2, when the plug housing 31 is inserted into the hood 26 of the receptacle housing 21 and the lever 40 is further tilted, the elastic deformation piece 61 is elastically deformed, whereby the engagement claw 63 of the arm portion 60 is 26 engaging recesses 64. As a result, the lever 40 is locked while being tilted, and the plug housing 31 is locked while being fitted to the hood 26 of the receptacle housing 21. In this state, the extending portion 42 of the lever 40 is parallel to the upper surface (one surface side) 31 a of the plug housing 31.
The elastic deformation piece 61 has an upper end 61b above the hood 26 so that the plug housing 31 can be inserted into the hood 26 of the receptacle housing 21 and the pressing operation can be performed with the lever 40 tilted. It is formed to protrude. In order to unlock the lever 40, the upper end portion 61 b of the elastic deformation piece 61 is pressed in the short direction of the hood 26. Then, the upper end portion 61b side of the elastic deformation piece 61 is elastically deformed in a direction away from the inner wall surface of the hood 26, and the engagement between the engagement claw 63 of the arm portion 60 and the engagement concave portion 64 of the hood 26 can be released. The lever 40 may be raised as it is.

  Moreover, as shown in FIG.7 (b), the elastic deformation piece 61 has the latching piece (2nd extension part) 65 extended below from the fulcrum part 61a. A locking claw (engagement portion, first engagement portion) 65 a that protrudes to the side facing the plug housing 31 is formed at the distal end portion of the locking piece 65.

  On the other hand, the plug housing 31 is formed with an engaging projection 66 with which the locking claw 65a is engaged. In the present embodiment, as shown in FIGS. 7A and 7B, the engaging projection 66 is in a state where the locking claw 65a is engaged with the engaging projection 66, and the lever 40 is moved from the one end 40a side. The other end 40b side is formed at a position where it is lowered (closer to the plug housing 31).

When these locking claws 65a are engaged with the engaging projections 66, the lever 40 is locked to the plug housing 31 in a state where the plug housing 31 is not fitted to the receptacle housing 21 (hereinafter, this state is referred to as temporary locking). Can be called).
In the temporarily locked state, the upper end portion 61b of the elastic deformation piece 61 of the lever 40 is pressed toward the plug housing 31 side. Then, the elastic deformation piece 61 is elastically deformed around the fulcrum portion 61a, and accordingly, the locking claw 65a is separated from the engagement protrusion 66 of the plug housing 31. As a result, the engagement between the locking claw 65a and the engaging protrusion 66 is released, and the lever 40 can be rotated by being released from the temporarily locked state.

As shown in FIGS. 4 and 7, the lever 40 is formed with an engagement plate 67 that protrudes and extends from the side plate 42 p toward the arm portion 60 side.
On the other hand, an engagement protrusion 68 is formed on the surface of the plug housing 31 facing the engagement plate 67.
As shown in FIG. 4, the engagement plate 67 is configured such that the lower side 67 a engages with the engagement protrusion 68 in a state where the other end portion 40 b of the lever 40 is raised. Thereby, the lever 40 is locked to the plug housing 31 in the raised state.

  As described above, the plug housing 31 is inserted into the receiving space 27 of the receptacle housing 21 in a state where the lever 40 is raised, that is, in a state where the lever 40 is locked in the engagement plate 67.

Further, as shown in FIG. 3, a release claw 69 for releasing the lock of the lever 40 is provided on the inner peripheral surface of the hood 26 of the receptacle housing 21.
As shown in FIGS. 9 and 10, when the plug housing 31 in a state where the lever 40 is locked and the plug housing 31 is inserted into the receptacle housing 21, the release claw 69 is engaged with the engagement plate 67. In the vicinity of the portion engaged with 68, it is formed at a position to be inserted between the engagement plate 67 and the plug housing 31. Such a release claw 69 may have any shape. For example, as shown in FIG. 3, as shown in FIG. And a claw body 69b extending in parallel with the inner peripheral surface of the hood 26 from the portion. The claw body 69b is formed so as to be inserted between the engagement plate 67 and the plug housing 31 on the distal end side of the engagement plate 67 with respect to the portion engaging with the engagement protrusion 68.
As a result, when the plug housing 31 in the locked state caused by the lever 40 is inserted into the receptacle housing 21, the claw body of the release claw 69 is shown in FIGS. 69 b enters between the engagement plate 67 and the plug housing 31 and elastically deforms the engagement plate 67 in a direction away from the plug housing 31. As a result, the engagement between the engagement plate 67 and the engagement protrusion 68 is released, and the lever 40 is released from the locked state. Thereafter, as described above, the plug housing 31 is moved into the receptacle housing according to the lever principle that acts between the cam projection 55 and the cam groove 56 by pushing the other end 40b of the lever 40 and tilting the lever 40. 21 is inserted. The engagement claw 63 of the arm portion 60 is engaged with the engagement recess 64 of the hood 26, so that the plug housing 31 is locked in a state of being fitted to the hood 26 of the receptacle housing 21.

  In the present embodiment, the elastic deformation piece 61 provided on each of the plug connectors 30A, 30B, and 30C for performing the locking / releasing operation of the lever 40 as described above is provided with respect to the receptacle housing 21. It is provided on the same side. Thereby, in any of the plug connectors 30A, 30B, and 30C, the lever 40 can be locked and released from one side of the receptacle housing 21.

  Also, as shown in FIG. 6, in the lever 40, the arm portions 60 located on both sides of the plug housing 31 are connected by a connecting portion 70. Even in the temporarily locked state in which the connecting portion 70 is locked by causing the lever 40, the arm portions 60, 60 are provided so as not to interfere with the electric wire (wire harness) 100 electrically connected to the contact 33 in the contact holding hole 32. It is provided in the front-end | tip part side.

As shown in FIGS. 4 and 6 (b), in the plug housing 31, a protruding portion 71 extending in the vertical direction is formed on the side surface 31 b on the side facing the connecting portion 70. The protruding portion 71 is formed in an arc shape with the support shaft 41 as the center.
On the other hand, the connecting portion 70 is formed with a guide portion 72 having a substantially U-shaped cross section having a concave portion 72a into which the protruding portion 71 enters. The guide portion 72 maintains a state where it always meshes with the protruding portion 71 when the lever 40 is rotated about the support shaft 41.
Accordingly, it is possible to prevent the electric wire from entering the gap between the lever 40 and the plug housing 31 in any state from the temporarily locked state in which the lever 40 is raised to the state in which the lever 40 is tilted.

  Further, in the plug housing 31, a jaw portion 75 that protrudes to the side where the connecting portion 70 is provided is formed on the side facing the receptacle housing 21. When the connecting portion 70 interferes with the jaw portion 75, the rotation angle of the lever 40 in the direction in which the lever 40 is tilted is regulated.

As described above, the arm portion 60 extending downward (on the other surface side of the plug housing 31) is provided at the other end portion 40b of the lever 40, and the arm portion 60 is elastic like a plate-like or beam-like spring. An elastically deformable piece 61 that deforms is provided. The elastic deformation piece 61 has a locking piece 65 extending downward from the fulcrum portion 61 a, a locking claw 65 a is formed at the tip of the locking piece 65, and the locking claw 65 a is engaged with the plug housing 31. The engaging projections 66 are formed, and these locking claws 65a are engaged with the engaging projections 66 so that the lever 40 is temporarily locked to the plug housing 31 in a state where the plug housing 31 is not fitted to the receptacle housing 21. it can.
Accordingly, it is possible to prevent the lever 40 from being caught by surrounding parts or articles when the plug connector 30 is fitted to the receptacle connector 20 or during transportation.

Note that the configuration shown in the above embodiment is merely an example, and the specific structure and the like can be changed other than those shown in the above embodiment.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

  DESCRIPTION OF SYMBOLS 10 ... Electrical connector assembly, 20 ... Receptacle connector, 21 ... Receptacle housing (first housing), 22 ... Contact (first contact), 26 ... Hood, 27 ... Receiving space, 30 ... Plug connector, 31 ... Plug Housing (housing, second housing), 31a ... upper surface (one surface side), 31b ... side surface, 32 ... contact holding hole, 33 ... contact (second contact), 40 ... lever, 40a ... one end, 40b ... other End part, 41 ... support shaft, 42 ... extension part, 60 ... arm part, 61 ... deformation piece, 61a ... fulcrum part, 61b ... upper end part (first extension part), 63 ... engaging claw (second Engagement part), 64 ... engagement recess (second engagement part), 65 ... locking piece (second extension part), 65a ... locking claw (engagement part, first engagement part) , 66 ... engagement protrusion, 67 ... engagement plate 68 ... engaging projection, 69 ... release pawl 70 ... connecting portion, 71 ... protruding portion, 72 ... guide portion, 100 ... wire harness

Claims (7)

A housing;
A contact held in the housing;
A lever provided on one side of the housing and having one end rotatably connected to the housing via a support shaft;
The lever includes an extending portion extending along the longitudinal direction of the housing toward the other end portion of the lever, and an arm portion extending from the extending portion toward the other surface side of the housing at the other end portion of the lever. Formed into a substantially L-shape,
The electrical connector according to claim 1, wherein the arm portion is provided with an engaging portion that engages with the housing in a state where the extending portion is along one side of the housing.   A first extending portion provided on the arm portion via a fulcrum, extending to the one surface side of the housing along the side surface of the housing with respect to the fulcrum, and along a side surface of the housing with respect to the fulcrum A second extension part extending to the other surface side of the housing and having the engagement part formed therein, wherein the first extension part and the second extension part are provided in the housing. The electrical connector according to claim 1, further comprising an elastically deformable piece that is elastically deformable in a direction orthogonal to the side surface. An electrical connector assembly comprising:
A first housing;
A second housing that fits into the first housing;
A first contact held in the first housing;
A second contact held in the second housing and connected to the first contact,
The first housing includes a hood that forms a space for receiving the second housing;
A lever whose one end is rotatably connected to the second housing via a support shaft on one surface side of the second housing to reduce the insertion force of the second housing into the hood. With
The lever includes an extending portion extending along a longitudinal direction of the second housing toward the other end portion of the lever, and the other end portion of the lever from the extending portion to the other surface side of the second housing. An approximately L-shape formed from an arm portion extending toward the
In the arm portion, a first engagement portion that engages with the second housing in a state where the extending portion is along one surface side of the second housing;
With the second housing inserted into the hood of the first housing, a second engagement portion that engages with the first housing inside the hood;
An electrical connector assembly comprising: The arm portion is provided with an elastically deformable piece that is elastically deformable in a direction perpendicular to the side surface of the second housing along the side surface of the second housing,
The electrical connector assembly according to claim 3, wherein the first engagement portion and the second engagement portion are formed on the elastic deformation piece. The elastic deformation piece is provided on the arm portion through a fulcrum, and extends to one side with respect to the fulcrum, and a second extension extends to the other side with respect to the fulcrum. And comprising
The said 1st engaging part is provided in said 2nd extension part, and said 2nd engaging part is formed in said 1st extension part. Electrical connector assembly.   The said 1st extension part of the said elastic deformation piece protrudes from the said hood in the state which inserted the said 2nd housing in the said hood of the said 1st housing. Electrical connector assembly. A plurality of the hoods are provided in the first housing, and a plurality of the second housings are inserted into the plurality of hoods.
In a state where the plurality of second housings are inserted into the plurality of hoods, the elastic deformation pieces in the plurality of second housings are provided on one side with respect to the first housing. The electrical connector assembly according to any one of claims 3 to 6, characterized in that

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