JP2012199105A - Dummy plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability of the locking function.SOLUTION: A dummy plug 30 comprises a body part 31 which is housed in a terminal housing chamber 11 of a housing 10, a seal portion 33 which is fitted fluid-tightly in a seal hole 19 of a lump rubber plug 18 with being extended backward from the body part 31, an operation part 34 which is projected backward of a holder 20 through a through hole 24 of the holder 20 with being extended backward from the seal portion 33, and an elastic engaging piece 35 which can deflect elastically in the terminal housing chamber 11 with being cantilevered forward from the front end of the body part 31, and engages with a locking part 13 facing the terminal housing chamber 11 in locked state.

Description

  The present invention relates to a dummy plug.

  Patent Document 1 corresponds to a housing in which a plurality of terminal accommodating chambers are formed, a collective rubber stopper that has a plurality of sealing holes corresponding to the terminal accommodating chambers and is attached to the rear end of the housing, and the sealing holes. There is disclosed a connector having a plurality of through-holes and a holder disposed behind a batch rubber plug, and a terminal fitting that is inserted into the terminal accommodating chamber through the through-hole and the seal hole. .

  A dummy plug can be attached to this connector. The dummy plug is elongated in the front-rear direction as a whole, a waterproof part is formed at the front end, and an operation part having a plate shape for pulling out extends from the rear end of the waterproof part. An elastic locking piece is formed at the front end of the operation portion so as to extend rearward in a cantilevered manner.

  When the dummy plug is attached to the connector, the waterproof portion passes through the seal hole of the batch rubber plug, thereby closing the seal hole in a liquid-tight manner. Further, the operating portion penetrates the through hole of the holder, and the elastic locking piece is locked to the hole edge portion of the through hole on the front surface of the holder. Due to the locking between the elastic locking piece and the holder, the dummy plug is held in a state of being prevented from being removed from the holder.

JP 2008-305660 A

  The dummy stopper is formed so that the elastic locking piece is along the outer surface of the operation portion. Therefore, when the operation portion and the elastic locking piece pass through the through hole, the elastic locking piece is placed on the outer surface of the operation portion. On the other hand, it bends elastically in the approaching direction. Since the opening size of the through-hole is fixed, the bending allowance of the elastic locking piece is limited to the dimension obtained by subtracting the thickness of the operation part and the thickness of the elastic locking piece from the opening size of the through-hole, ensuring a sufficiently large amount Difficult to do. Since the bending allowance of the elastic locking piece becomes the locking allowance between the elastic locking piece and the holder, there is a problem that the reliability of the dummy plug removal function is low.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve the reliability of the retaining function.

  As a means for achieving the above object, the invention of claim 1 includes a housing in which a plurality of terminal accommodating chambers are formed, and a plurality of seal holes corresponding to the terminal accommodating chambers. A dummy plug that is attached to a connector that includes a batch rubber plug that is attached to an end, and a holder that has a plurality of through-holes corresponding to the seal hole and is arranged behind the batch rubber plug, A main body part accommodated in the terminal accommodating chamber, a form extending rearward from the main body part, a seal part fitted in a liquid-tight manner into the seal hole, and a rearward extension from the seal part An operation part that penetrates through the through-hole and protrudes rearward of the holder, and is a form that cantilevered forward from the front end of the main body part, and is elastic in the terminal accommodating chamber. Bendable and front Where that is configured and a resilient locking pieces to be engaged in the retaining state with respect to the retaining portion facing the terminal accommodating chamber with the features.

  According to a second aspect of the present invention, in the first aspect of the present invention, the retaining portion has a stepped shape in a part of the support wall portion that is more flexible than the elastic locking piece in the inner wall portion of the terminal accommodating chamber. The elastic stopper piece is characterized in that a protruding portion that is locked to the retaining portion is formed on the elastic stopper piece.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the elastic locking piece is formed with a cutout portion in a locally cutout shape.

<Invention of Claim 1>
In the state where the dummy plug is attached to the connector, the elastic stopper piece is locked to the retaining portion, whereby the dummy stopper is held in the retaining state. Since the elastic locking piece has a form extending from the front end of the main body in a cantilevered manner, the bending allowance of the elastic locking piece in the terminal accommodating chamber is determined by the thickness of the elastic locking piece from the inner dimension of the terminal accommodating chamber. It is possible to secure only the dimension obtained by subtracting. Therefore, compared with the case where the elastic locking piece is configured to extend along the outer surface of the main body, the dummy plug of the present invention can ensure a large bending allowance of the elastic locking piece, and thus Thus, it is possible to sufficiently secure the locking margin between the elastic locking piece and the retaining portion and to improve the reliability of the retaining function.

<Invention of Claim 2>
In the process of attaching the dummy plug, the elastic locking piece is elastically bent by the interference between the protrusion and the support wall. When the dummy plug reaches the proper mounting position, the elastic locking piece is elastically restored, and the protruding portion enters the retaining portion and is locked to the support wall portion. Since the elastic locking piece is locked to the support wall portion having a higher bending rigidity than the elastic locking piece, the reliability of the retaining function is excellent.

<Invention of Claim 3>
The elastic locking piece is easily bent because the cross-sectional area is reduced by forming a cutout portion that is cut out locally.

The partially-cutaway perspective view showing the state which attached the dummy stopper to the connector in Embodiment 1 Sectional view showing the process of attaching a dummy plug to the connector Sectional drawing which shows the state which insertion of the dummy stopper advanced from the state of FIG. Sectional drawing which shows the state which insertion of the dummy stopper advanced from the state of FIG. Cross-sectional view showing the state that the dummy plug has been installed Sectional view showing the terminal fitting inserted into the terminal compartment Front view of dummy plug Top view of dummy plug Bottom view of dummy plug Front view showing the positional relationship of dummy plugs when dummy plugs are inserted into two terminal storage chambers adjacent vertically Sectional drawing showing the state which attached the dummy stopper to the connector in Embodiment 2 Sectional view showing the process of attaching a dummy plug to the connector Sectional drawing which shows the state which insertion of the dummy stopper advanced from the state of FIG. Front view of dummy plug Top view of dummy plug Bottom view of dummy plug

<Embodiment 1>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 6, the connector A includes a housing 10, a retainer 17, a collective rubber plug 18, a holder 20, a plurality of terminal fittings 25, and a dummy plug 30.

  The housing 10 is made of synthetic resin. As shown in FIGS. 1 to 6, a plurality of terminal accommodating chambers 11 that penetrate the housing 10 in the front-rear direction are divided into upper and lower parts in the left-right direction. Are formed in parallel. As shown in FIG. 1, the terminal accommodating chambers 11 that form a pair in the vertical direction have a vertically symmetric form or a point symmetric form with respect to the longitudinal axis. The upper terminal accommodating chamber 11 and the lower terminal accommodating chamber 11 are partitioned by a highly rigid support wall portion 12. At the front end portion of the support wall portion 12, a retaining portion 13 is formed that is notched in a step shape so that the upper terminal accommodating chamber 11 and the lower terminal accommodating chamber 11 communicate with each other. The retaining portion 13 faces both the upper terminal accommodating chamber 11 and the lower terminal accommodating chamber 11.

  A lance 14 is integrally formed on the upper wall portion of the upper terminal accommodating chamber 11 so as to extend forward in a cantilevered manner at the front end portion. The lance 14 can be elastically bent upward. A lance 14 is integrally formed on the lower wall portion of the lower terminal accommodating chamber 11 so as to extend forward in a cantilevered manner at the front end portion thereof. The lance 14 can be elastically bent downward. Further, in the front-rear direction, the front end (extended end) of the lance 14 and the retaining portion 13 are substantially at the same position.

  As shown in FIGS. 1 to 6, at a position behind the lance 14 in the housing 10, there are a mounting groove 15 communicating from the upper surface of the housing 10 to the upper terminal accommodating chamber 11, and a lower terminal from the lower surface of the housing 10. A mounting groove 15 communicating with the storage chamber 11 is formed. A retainer 17 is attached to the attachment groove 15. The retainer 17 attached to the attachment groove 15 advances into the internal space of the terminal accommodating chamber 11 (within the insertion path of the terminal fitting 25). A relief groove 16 extending in the front-rear direction from the mounting groove 15 to the rear end of the housing 10 is formed in the upper wall portion of the upper terminal accommodating chamber 11. An escape groove 16 extending in the front-rear direction from the attachment groove 15 to the rear end of the terminal storage chamber 11 (rear end of the housing 10) is also formed in the lower wall portion of the lower terminal storage chamber 11.

  As shown in FIGS. 1 to 6, the collective rubber plug 18 has a thick plate shape with the plate thickness direction as the front-rear direction, and is brought into contact with the rear end portion (rear end surface) of the housing 10 from the rear. It is attached in a state. The collective rubber plug 18 is formed with a plurality of seal holes 19 that are circularly penetrated in the front-rear direction so as to be aligned with the terminal accommodating chamber 11. In each seal hole 19, a well-known lip portion is formed, and the opening edge portion on the front surface side and the opening edge portion on the rear surface side of the seal hole 19 are tapered.

  The holder 20 is made of a synthetic resin, and as shown in FIGS. 1 to 6, a rear wall portion 21 and a peripheral wall portion 22 in a form extending forward from the outer peripheral edge of the rear wall portion 21 are integrally formed. It has an accommodation recess 23 that is configured and has a recessed front surface. The collective rubber plug 18 is accommodated in the accommodating recess 23, and the rear wall portion 21 is in contact with the rear surface of the collective rubber plug 18. The holder 20 is assembled in a state where relative displacement is restricted with respect to the housing 10, and the collective rubber plug 18 is held in an attached state with respect to the housing 10 by the holder 20. In the holder 20, a plurality of through holes 24 for penetrating the rectangular tube portion 26 of the terminal fitting 25 are formed in alignment with the seal hole 19.

  As shown in FIG. 6, a terminal fitting 25 is inserted from the rear (right side in FIG. 6) into the necessary terminal storage chamber 11 among the plurality of terminal storage chambers 11. A square tube portion 26 that functions as a connection means with a mating terminal (not shown) is formed at the front end portion of the terminal fitting 25, and the wire crimping portion 27 formed at the rear end portion of the terminal fitting 25 has a wire 28. The front end is connected. The rectangular tube portion 26 is formed with a locking projection 29 that protrudes from the upper surface thereof. Further, the rear end edge portion on the upper surface of the rectangular tube portion 26 has a step shape due to the height difference from the electric wire crimping portion 27.

  The terminal fitting 25 is attached in the terminal accommodating chamber 11 from behind the connector A. When the terminal fitting 25 is attached to the upper terminal accommodating chamber 11, the terminal fitting 25 has a posture in which the locking projection 29 protrudes upward from the rectangular tube portion 26. When the terminal fitting 25 is attached to the lower terminal accommodating chamber 11, the terminal fitting 25 has a posture in which the locking projection 29 protrudes downward from the rectangular tube portion 26. Then, the rectangular tube portion 26 and the electric wire crimping portion 27 are sequentially passed through the through hole 24 of the holder 20 and the seal hole 19 of the collective rubber plug 18 and inserted into the terminal accommodating chamber 11. In the process of insertion, the locking projection 29 passes through the escape groove 16 and then elastically deflects the lance 14 upward.

  When the terminal fitting 25 reaches the normal insertion position, the lance 14 is elastically restored and locked to the locking projection 29 from the rear. Due to the locking of the lance 14, the terminal fitting 25 is held in a retaining state. Further, the electric wire 28 penetrates the seal hole 19 in a liquid-tight manner, penetrates the through-hole 24, and is led out of the holder 20. When the retainer 17 is attached to the attachment groove 15 after the terminal fitting 25 is inserted, the retainer 17 is locked from the rear with respect to the rear end edge portion forming the step shape of the rectangular tube portion 26 of the terminal fitting 25. Due to the secondary locking of the retainer 17 and the primary locking of the lance 14, the terminal fitting 25 is reliably prevented from being pulled out.

  The dummy plug 30 is made of a synthetic resin and has a shape elongated in the front-rear direction as a whole, as shown in FIGS. As shown in FIGS. 7 to 9, the dummy plug 30 is configured by integrally forming a main body portion 31, an erroneous insertion restriction portion 32, a seal portion 33, an operation portion 34, and an elastic locking piece 35. ing. The main body 31 has a substantially prismatic shape with the axis line in the front-rear direction. The erroneous insertion restricting portion 32 is elongated in the front-rear direction, and has a cross-sectional shape perpendicular to the front-rear direction that is generally an isosceles triangle (mountain shape) and protrudes from the upper surface (outer surface) of the main body 31 over the entire length. The seal portion 33 has a cylindrical shape whose axis is directed in the front-rear direction, and extends coaxially from the rear end of the main body portion 31 to the rear. The operation portion 34 has a cylindrical shape with the axis line directed in the front-rear direction, and extends coaxially from the rear end of the seal portion 33 to the rear. Since the outer diameter of the operation part 34 and the outer diameter of the seal part 33 are the same size, the seal part 33 and the operation part 34 form a single cylindrical shape at first glance.

  The elastic locking piece 35 is elongated in the front-rear direction as a whole, and has a form that cantilevered forward from the front end of the main body 31. That is, the elastic locking piece 35 and the seal part 33 have the protruding direction from the main body part 31 in the reverse direction. The lower surface of the elastic locking piece 35 is flush with the lower surface of the main body portion 31, and the left and right side surfaces of the elastic locking piece 35 are flush with the left and right side surfaces of the main body portion 31. It is lined up. That is, the elastic locking piece 35 and the main body 31 have the same width dimension. The thickness dimension (vertical dimension) of the elastic locking piece 35 is smaller than the thickness dimension of the main body 31 over the entire region in the front-rear direction. Therefore, the upper surface of the elastic locking piece 35 is lower than the upper surface of the main body 31 over the entire area. Further, the upper surface of the elastic locking piece 35 is inclined so as to have a downward slope toward the front.

  The elastic locking piece 35 is formed with a notch 36 having a shape in which the upper surface is notched locally. The notch 36 is formed in the center of the elastic locking piece 35 in the width direction and has a groove shape extending in the front-rear direction. The region where the notch 36 is formed in the front-rear direction extends from the position slightly ahead of the rear end of the elastic locking piece 35 (the front end of the main body 31) to the front end of the elastic locking piece 35. Therefore, the notch 36 is open to the upper surface and the front end surface of the elastic locking piece 35.

  Further, the notch 36 has an opening 37 that allows the substantially second half region thereof to communicate with the lower surface of the elastic locking piece 35. That is, the notch 36 is configured to penetrate the elastic locking piece 35 in the vertical direction (a direction substantially parallel to the elastic bending direction of the elastic locking piece 35). A region in front of the opening 37 in the lower surface of the elastic locking piece 35 is a bottom wall 38 facing the notch 36. A region of the elastic locking piece 35 that sandwiches the notch 36 from both the left and right sides is a pair of left and right side walls 39.

  A protruding portion 40 is formed on the front end portion (extending end portion) of the elastic locking piece 35 so as to protrude downward from the lower surface thereof. The region where the protrusion 40 is formed in the front-rear direction is a range from a position slightly ahead of the front end of the opening 37 to the front end of the elastic locking piece 35. Further, the formation range of the protrusion 40 in the left-right direction is the left half region of the elastic locking piece 35.

  Next, the operation of the first embodiment will be described. When attaching the dummy plug 30 to the upper terminal accommodating chamber 11, the operation section 34 is picked so that the erroneous insertion restricting portion 32 protrudes upward from the main body 31, and as shown in FIGS. 30 is inserted into the through hole 24 and the seal hole 19 in this order from the rear of the connector A. As shown in FIG. 4, when the main body 31 and the erroneous insertion restricting portion 32 are inserted into the seal hole 19, the collective rubber plug 18 is elastically deformed so as to expand the seal hole 19. By the 18 elastic restoring force, the inclination of the posture of the dummy stopper 30 in the vertical and horizontal directions is suppressed. At this time, since the protrusion 40 at the front end of the elastic locking piece 35 is in sliding contact with the support wall portion 12, the elastic locking piece 35 is elastically bent upward with the rear end portion as a fulcrum. Thereafter, when the insertion of the dummy plug 30 proceeds, the main body portion 31 is accommodated in the terminal accommodating chamber 11 and the erroneous insertion restricting portion 32 is accommodated in the escape groove 16. The inclination of the posture in the left-right direction is restricted. During this time, the elastic locking piece 35 remains elastically bent.

  When the dummy plug 30 reaches the proper insertion position (attachment position), as shown in FIG. 5, the front end of the elastic locking piece 35 hits the front wall of the terminal accommodating chamber 11, and the dummy plug 30 is stopped in front. The In addition, the elastic locking piece 35 is elastically returned downward, the projection 40 enters the retaining portion 13, and the rear end of the projecting portion 40 is from the front with respect to the rear end (supporting wall portion 12) of the retaining portion 13. Lock. Due to this locking, the dummy plug 30 is held in the retaining state.

  When attaching the dummy plug 30 to the lower terminal accommodating chamber 11, the misinsertion restricting portion 32 is oriented so as to project downward from the main body portion 31, and the operation portion 34 is picked so as to penetrate the dummy plug 30 from the rear side of the connector A. The holes 24 and the seal holes 19 are inserted in this order. Thereafter, the dummy plug 30 is inserted in the same manner as when inserted into the upper terminal accommodating chamber 11 except that the upper terminal accommodating chamber 11 is upside down.

  In a state where the dummy plug 30 is correctly attached to the connector A, the main body 31 is accommodated in the region behind the attachment groove 15 in the terminal accommodating chamber 11 without largely shaking in the vertical and horizontal directions. The erroneous insertion restricting portion 32 is accommodated in the escape groove 16. Since the seal portion 33 penetrates the seal hole 19 in a liquid-tight manner, waterproofing is achieved in the seal hole 19. The operation portion 34 penetrates the through hole 24, and the rear end portion of the operation portion 34 projects rearward from the holder 20. The elastic locking piece 35 is accommodated in a region of the terminal accommodating chamber 11 in front of the rear end of the mounting groove 15. Since the elastic locking piece 35 is thinner than the main body 31, it does not interfere with the retainer 17.

  As shown in FIG. 10, the protrusion 40 of the dummy plug 30 inserted into the upper terminal accommodating chamber 11 and the protrusion 40 of the dummy plug 30 inserted into the lower terminal accommodating chamber 11 include a support wall portion. Although it is located at the same height as 12, it is arranged so as to be lined up side by side without interfering with each other. Therefore, compared with the form in which the upper protrusion and the lower protrusion are arranged vertically, in the first embodiment, the upper dummy plug 30 (terminal accommodating chamber 11) and the lower dummy plug 30 (terminal accommodating chamber 11) are arranged. ) Is reduced, and the overall height of the connector A is reduced.

  In addition, when the dummy plug 30 is inserted in an upside down posture or a posture inclined by 90 ° with respect to the normal posture, the front end of the erroneous insertion restricting portion 32 is the rear end of the terminal accommodating chamber 11 during the insertion. Since it abuts against the opening edge, further insertion operation is prevented. Thereby, it turns out that the insertion position of the dummy stopper 30 is inaccurate.

  Unlike the first embodiment, when the dummy stopper is a form in which the elastic locking piece extends along the outer surface of the main body, the bending allowance of the elastic locking piece in the terminal accommodating chamber 11 is the terminal The dimension is limited to the dimension obtained by subtracting the thickness of the main body and the thickness of the elastic locking piece from the inner dimension of the storage chamber. On the other hand, in the dummy plug 30 of the first embodiment, the elastic locking piece 35 extends in a cantilevered manner from the front end of the main body 31, and therefore, the elastic locking piece 35 in the terminal accommodating chamber 11. The bending allowance can be ensured by the dimension obtained by subtracting the thickness of the elastic locking piece 35 from the inner dimension of the terminal accommodating chamber 11. Therefore, the dummy plug 30 according to the first embodiment can secure a large bending allowance for the elastic locking piece 35 as compared with the case where the elastic locking piece is configured to extend along the outer surface of the main body. It is. As a result, it is possible to sufficiently secure a locking allowance between the elastic locking piece 35 and the retaining portion 13 and improve the reliability of the retaining function.

  Further, the retaining portion 13 of the housing 10 has a shape in which a part of the support wall portion 12 having a higher bending rigidity than the elastic locking piece 35 in the inner wall portion of the terminal accommodating chamber 11 is cut out in a stepped shape. The elastic locking piece 35 is formed with a protrusion 40 that is locked to the retaining portion 13. With this configuration, in the process of attaching the dummy plug 30, the elastic locking piece 35 is elastically bent due to the interference between the projection 40 and the support wall portion 12, and when the dummy plug 30 reaches the normal mounting position, the elastic locking piece 35 35 is elastically restored, and the protruding portion 40 enters the retaining portion 13 and is locked to the support wall portion 12. In the first embodiment, since the elastic locking piece 35 is locked to the support wall portion 12 having higher bending rigidity than the elastic locking piece 35, the reliability of the retaining function is excellent.

  Further, since the elastic locking piece 35 is formed with a cutout portion 36 that is cut out locally, the cross-sectional area in the direction crossing the front-rear direction is small, and the elastic locking piece 35 is easily bent. ing. Thereby, when attaching the dummy plug 30, since the frictional resistance resulting from the sliding of the projection part 40 and the support wall part 12 is reduced, workability | operativity is good.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a part of the connector B and the dummy plug 50 are configured differently from the first embodiment. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.

  The connector B of the second embodiment has the same form as the connector A of the first embodiment except that the retaining portion 13 formed in the first embodiment is not formed in the housing 10. The retainer 17, the collective rubber plug 18, the holder 20, and the terminal fitting 25 are all the same as those in the first embodiment.

  Next, the dummy stopper 50 of the second embodiment will be described. The dummy plug 50 is made of a synthetic resin, and has a shape elongated in the front-rear direction as a whole, as shown in FIGS. As shown in FIGS. 14 to 16, the dummy plug 50 is configured by integrally forming a main body portion 51, an erroneous insertion restricting portion 52, a seal portion 53, an operation portion 54, and an elastic locking piece 55. ing.

  The main body 51 has a substantially prismatic shape with the axis oriented in the front-rear direction. The erroneous insertion restricting portion 52 is elongated in the front-rear direction, and the cross-sectional shape perpendicular to the front-rear direction is generally an isosceles triangle (mountain shape), and protrudes from the upper surface (outer surface) of the main body 51 over the entire length. The seal portion 53 has a cylindrical shape whose axis is directed in the front-rear direction, and extends coaxially from the rear end of the main body portion 51 to the rear. The operation portion 54 has a cylindrical shape with the axis line directed in the front-rear direction, and extends coaxially from the rear end of the seal portion 53 to the rear. Since the outer diameter of the operation portion 54 and the outer diameter of the seal portion 53 are the same size, the seal portion 53 and the operation portion 54 form a single column at first glance.

  The elastic locking piece 55 is elongated in the front-rear direction as a whole, and has a form that cantilevered forward from the front end of the main body 51. That is, the elastic locking piece 55 and the seal portion 53 have the protruding direction from the main body 51 in the reverse direction. The upper surface of the elastic locking piece 55 is inclined so as to rise upward. The lower surface of the elastic locking piece 55 is inclined so as to have an upward slope toward the front, and the rear end portion thereof is continuous with the lower surface of the main body portion 51 in a flush manner. The left and right side surfaces of the elastic locking piece 55 are connected to the left and right side surfaces of the main body 51 so as to be flush with each other, and the elastic locking piece 55 and the main body 51 have the same width. The thickness dimension (vertical dimension) of the elastic locking piece 55 is smaller than the thickness dimension of the main body 51 over the entire region in the front-rear direction. Therefore, the upper surface of the elastic locking piece 55 is positioned lower than the upper surface of the main body 51 over the entire area.

  The elastic locking piece 55 is formed with a notch 56 having a shape in which a lower surface thereof is locally cut out. The notch 56 is formed at the center of the elastic locking piece 55 in the width direction and has a groove shape extending in the front-rear direction. The region where the notch 56 is formed in the front-rear direction extends from the position slightly ahead of the rear end of the elastic locking piece 55 (the front end of the main body 51) to the front end of the elastic locking piece 55. Therefore, the notch 56 is opened to the lower surface and the front end surface of the elastic locking piece 55.

  Further, the notch 56 has an opening 57 that allows the substantially second half region thereof to communicate with the upper surface of the elastic locking piece 55. That is, the notch 56 is configured to penetrate the elastic locking piece 55 in the vertical direction (direction substantially parallel to the elastic bending direction of the elastic locking piece 55). A region of the elastic locking piece 55 that sandwiches the notch portion 56 from both the left and right sides is a pair of left and right side wall portions 58. A protruding portion 59 is formed on the front end portion (extending end portion) of the elastic locking piece 55 so as to protrude upward from the upper surface thereof. The region where the protrusion 59 is formed in the front-rear direction is a range from the front end of the opening 57 to the front end of the elastic locking piece 55. Further, the formation range of the protrusion 59 in the left-right direction is the full width region of the elastic locking piece 55.

  Next, the operation of the second embodiment will be described. When the dummy plug 50 is attached to the upper terminal accommodating chamber, the operation portion 54 is picked so that the erroneous insertion restricting portion 52 protrudes upward from the main body portion 51, and the dummy plug 50 is inserted from the rear side of the connector B to the through hole 24. And are inserted into the seal holes 19 in order. When the main body 51 and the erroneous insertion restricting portion 52 are inserted into the seal hole 19, the collective rubber plug 18 is elastically deformed so as to expand the seal hole 19, and a dummy is recovered by the elastic restoring force of the collective rubber plug 18. The inclination of the posture of the stopper 50 in the vertical and horizontal directions is suppressed. At this time, since the projection 59 at the front end of the elastic locking piece 55 is accommodated in the escape groove 16, the elastic locking piece 55 hardly elastically bends.

  Then, when the projection 59 is located at a position corresponding to the mounting groove 15, the projection 59 interferes with a region behind the lance 14 in the upper wall portion as shown in FIG. However, it is elastically bent downward by using the rear end portion as a fulcrum. Thereafter, when the insertion of the dummy plug 50 proceeds, the main body portion 51 is accommodated in the terminal accommodating chamber 11 and the erroneous insertion restricting portion 52 is accommodated in the escape groove 16. The inclination of the posture in the left-right direction is restricted. During this time, as shown in FIG. 13, the protrusion 59 is in sliding contact with the upper wall, so that the elastic locking piece 55 remains elastically bent downward. Thereafter, when the projection 59 comes into contact with the front end (extension end) of the lance 14, the lance 14 is elastically bent so as to escape upward, and the elastic locking piece 55 is slightly elastically restored upward. To do.

  When the dummy plug 50 reaches the proper insertion position (attachment position), as shown in FIG. 11, the front end of the elastic locking piece 55 hits the front wall of the terminal accommodating chamber 11, and the dummy plug 50 is stopped. The Further, the elastic locking piece 55 is elastically restored upward, and the projection 59 is locked to the front end portion of the lance 14 from the front. Due to this locking, the dummy plug 50 is held in the retaining state.

  When attaching the dummy plug 50 to the lower terminal accommodating chamber 11, the erroneous insertion restricting portion 52 is oriented so as to protrude downward from the main body portion 51, and the operation portion 54 is picked so that the dummy plug 50 penetrates from behind the connector B. The holes 24 and the seal holes 19 are inserted in this order. Thereafter, the dummy plug 50 is inserted in the same manner as when inserted into the upper terminal accommodating chamber 11 except that the upper terminal accommodating chamber 11 is upside down.

  When the dummy plug 50 is correctly attached to the connector, the main body 51 is accommodated in the region behind the attachment groove 15 in the terminal accommodating chamber 11 without being largely rattled in the vertical and horizontal directions. The erroneous insertion restricting portion 52 is accommodated in the escape groove 16. Since the seal portion 53 penetrates the seal hole 19 in a liquid-tight manner, waterproofing is achieved in the seal hole 19. The operation portion 54 passes through the through hole 24, and the rear end portion of the operation portion 54 protrudes rearward of the holder 20. The elastic locking piece 55 is accommodated in a region of the terminal accommodating chamber 11 in front of the rear end of the mounting groove 15. Since the elastic locking piece 55 is thinner than the main body 51, it does not interfere with the retainer 17.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Embodiments 1 and 2 described above, the cutout portion has a groove shape that is long in the front-rear direction, but the cutout portion is not limited to the groove shape.
(2) In the first and second embodiments, the notch is configured to penetrate the elastic locking piece in the bending direction, but the notch may be configured to penetrate in the direction intersecting with the bending direction. .
(3) In Embodiments 1 and 2 above, the cutout portion has a form that penetrates the elastic locking piece, but the cutout portion does not have a form that penetrates the elastic locking piece, but a form that is recessed in a bag path shape. Also good.
(4) In Embodiments 1 and 2 described above, only one cutout portion is formed in the elastic locking piece, but a plurality of cutout portions may be formed.
(5) In Embodiments 1 and 2 described above, the cutout portion in the form of being locally cut out is formed in the elastic locking piece, but the elastic locking piece may be formed in a form in which the cutout portion is not formed.

DESCRIPTION OF SYMBOLS A ... Connector 10 ... Housing 11 ... Terminal accommodating chamber 12 ... Support wall part 13 ... Stopping part 18 ... Collective rubber plug 19 ... Seal hole 20 ... Holder 24 ... Through-hole 30 ... Dummy plug 31 ... Main-body part 33 ... Seal part 34 ... Operation part 35 ... Elastic locking piece 36 ... Notch part 40 ... Projection part B ... Connector 50 ... Dummy plug 51 ... Main body part 53 ... Seal part 54 ... Operation part 55 ... Elastic locking piece 56 ... Notch part 59 ... Projection part

Claims (3)

A housing in which a plurality of terminal accommodating chambers are formed;
A batch rubber plug that has a plurality of seal holes corresponding to the terminal accommodating chamber and is attached to the rear end of the housing;
A dummy plug attached to a connector having a plurality of through-holes corresponding to the seal hole and having a holder disposed behind the batch rubber plug;
A main body housed in the terminal housing chamber;
A seal portion that is rearwardly extended from the main body, and is fitted in the seal hole in a liquid-tight manner;
It is a form extending rearward from the seal part, and an operation part that protrudes rearward of the holder through the through-hole,
The main body is extended in a cantilevered manner from the front end of the main body, can be elastically bent in the terminal accommodating chamber, and is locked in a retaining state with respect to a retaining portion facing the terminal accommodating chamber. A dummy plug comprising an elastic locking piece. The retaining portion is a dummy plug attached to a connector having a shape in which a part of a support wall portion having a higher bending rigidity than the elastic locking piece in the inner wall portion of the terminal accommodating chamber is cut out in a stepped shape. And
The dummy stopper according to claim 1, wherein the elastic locking piece is formed with a protruding portion that is locked to the retaining portion.   The dummy stopper according to claim 1 or 2, wherein the elastic locking piece is formed with a cutout portion in a locally cutout shape.

Images