JP5737446B1 - Electrical connector mating structure - Google Patents

Abstract

Even if an inner housing is inserted into a fitting hole of an outer housing in a state where the orientation of the inner housing is reversed upside down, the thin wall portion of the inner housing is prevented from being damaged, so that high reliability can be achieved. Provided is a connector fitting structure. An electrical connector fitting structure is formed by an outer housing having a fitting hole and an inner housing inserted into the fitting hole. When trying to insert the inner housing 220 into the outer housing 120 with the insertion orientation of the inner housing 220 into the fitting hole 121 turned upside down, the thin portion 222a of the inner housing 220 interferes with the key portion 122b of the outer housing 120. However, since the linear convex part 223a of the inner housing 220 abuts on the side wall part 124 of the outer housing 120, the pressing force to the thin part 222a by the key part 122b can be reduced. [Selection] Figure 13

Description

  The present invention relates to a fitting structure of an electrical connector by an outer housing having a fitting hole and an inner housing inserted into the fitting hole, and in particular, a convex portion protruding from the fitting hole in the outer housing. The present invention relates to a fitting structure for an electrical connector in which a concave portion that fits into the convex portion is formed in an inner housing.

When inserting the other housing into one housing with the fitting hole formed, the other housing is prevented from being inserted while being rolled up, or the other housing is placed in the fitting hole of one housing. In order to prevent being inserted in an inverted state, one housing having a fitting hole is formed with a protrusion protruding into the fitting hole, and the other housing is fitted with the protrusion. A concavity is formed.
As an electrical connector having such a housing, those described in Patent Documents 1 and 2 are known.

  In the connector described in Patent Document 1, fitting grooves 1002 are formed at both side edges of the opening of the receiving connector 1001 shown in FIG. 14, and both side edges of the opposing side plates of the insertion side connector 1101 shown in FIG. An engagement piece 1102 is formed along the line.

  Further, the connector disclosed in Patent Document 2 includes a male housing 1100 illustrated in FIG. 16 and a hood portion 1101 in which the female housing 1110 illustrated in FIG. 17 is fitted and fitted, and the regulated portion 1102 projects from the hood portion 1101. The female housing 1110 is provided with a restricting portion 1111 capable of restricting deformation of the hood portion 1101 to the outside by being locked with respect to the restricted portion 1102, and protruding to the side of the restricting portion 1111. The portion is a receiving portion 1112 that receives the locking portion 1103 of the restricted portion 1102.

Japanese Utility Model Publication No. 58-51586 JP 2004-103449 A

  For example, when the inner housing 2201 of the conventional female electrical connector 2200 shown in FIG. 19 is inserted into the fitting hole 2102 of the outer housing 2101 of the conventional male electrical connector 2100 shown in FIG. There is a case where the posture is mistakenly attempted to be inserted into the outer housing 2101 in a state of being inverted upside down.

  The outer housing 2101 is formed with a key portion 2103 that is a projection protruding into the fitting hole, and the inner housing 2201 corresponds to the key portion 2103 of the outer housing 2101 when the insertion posture is in a normal state. Thus, a groove 2202 that is a recess is formed. For this reason, when the inner housing 2201 is inserted into the outer housing 2101 with the top and bottom inverted, the key portion 2103 of the outer housing 2101 interferes with the thin portion 2203 located at the bottom of the inner housing 2201.

  At this time, if the key portion 2103 of the outer housing 2101 strongly presses against the thin portion 2203 of the inner housing 2201, the thin portion 2203 may be damaged.

  Therefore, the present invention can achieve high reliability by preventing the thin portion of the inner housing from being damaged even when trying to insert the inner housing into the fitting hole of the outer housing with the insertion posture of the inner housing reversed upside down. An object of the present invention is to provide a fitting structure for an electric connector.

The present invention is an electrical connector fitting structure comprising an outer housing having a fitting hole and an inner housing inserted into the fitting hole, and the outer housing protrudes from an inner wall surface into the fitting hole. A first convex portion; and first concave portions formed on inner wall surfaces of side wall portions on both sides of the wall portion on which the first convex portion is formed, and the inner housing includes the first convex portion. Inserted in a state where the insertion position into the fitting hole formed on the front surface facing the outer housing when the second concave portion for guiding the outer housing is fitted to the outer housing is inverted upside down. Sometimes formed from a position aligned with the opening of the fitting hole along the direction in which the outer housing and the inner housing are fitted together , and the thin portion that interferes with the first convex portion , and Said second recess Are formed to protrude from the outer wall surface of the side wall portion that is connected to the wall portion that is provided, characterized in that a second convex portion fitted respectively to said first recess.

According to the electrical connector fitting structure of the present invention, when the insertion orientation of the outer housing into the fitting hole is inverted, the first convex portion of the outer housing is inserted into the inner housing. Even if the thin wall portion formed aligned with the front surface on the fitting side of the inner housing interferes, it is formed along the fitting direction from the position aligned with the opening portion of the fitting hole of the inner housing , and The second convex portion formed by projecting from the outer wall surface of the side wall portion connected to the wall portion provided with the two concave portions comes into contact with the side wall portion of the outer housing , so that the thin portion by the first convex portion The pressing force to the can be reduced.

  The thin-walled portion is a release space for unlocking and unlocking the lance portion that is locked to the connector terminal accommodated in the inner housing and prevents the connector terminal from being pulled out. It is desirable to make the outer wall part thinner in thickness by the release space having a part. By doing so, even if the outer wall portion is a thin portion whose thickness is reduced by the release space, it is possible to prevent the thin portion from being damaged.

It is desirable that the first recess is formed of a pair and is formed at a position facing the inner wall surface of the side wall portion of the outer housing . Thereby, even if each protrusion amount of the 2nd convex part fitted to a 1st recessed part is small, since the whole protrusion amount can be made into the sum total of a 2nd convex part, 2nd convex part The strength of can be improved.

It is desirable that the first concave portion is formed at an end portion in the vertical direction of the side wall portion of the outer housing . If the inner housing is turned upside down and you try to force it into the outer housing, the second convex part corresponding to the first concave part will spread the side wall of the outer housing outward and enter the fitting hole. I will try. However, since the first concave portion is formed at the end portion of the side wall portion in the vertical direction, the second convex portion comes into contact with the end portion of the side wall portion of the outer housing, so that the side wall portion is deformed outward. Can be difficult.

  It is desirable that the first concave portion is formed at an end portion that is opposite to the top-and-bottom direction from the side on which the first convex portion is formed. When the inner housing is turned upside down and is inserted into the outer housing, the second convex portion corresponding to the first concave portion comes into contact with the outer housing at a position close to the first convex portion. Therefore, the pressing force applied to the thin portion by the first convex portion is reduced by the second convex portion coming into contact with the side wall portion at a position close to the first convex portion.

The side wall portion of the outer housing has an outer wall surface corresponding to a position where the first concave portion is formed in the thickness direction while the thickness of the side wall portion is notched to form the first concave portion. Is preferably formed on a flat surface. Thereby, since there is no protrusion on the outer wall surface of the side wall portion in which the first recess is formed, the width of the outer housing is larger than that in which the outer wall surface of the side wall portion is protruded according to the depression of the first recess. Can be narrowed.

  It is desirable that the second convex portion is formed corresponding to the position where the thin portion is formed. When trying to insert the inner housing into the outer housing with the inner housing turned upside down, the second protrusion comes into contact with the side wall of the outer housing. Therefore, the pressing force applied to the thin portion by the first convex portion is reduced by the second convex portion formed corresponding to the position where the thin portion is formed abutting the side wall portion.

  According to the present invention, since the second convex portion of the inner housing abuts on the outer housing, the pressing force to the thin portion by the first convex portion can be reduced, so the fitting hole of the outer housing Furthermore, even if it is attempted to insert the inner housing in a state where the insertion posture of the inner housing is turned upside down, high reliability can be achieved by preventing the thin portion of the inner housing from being damaged.

It is the perspective view which looked at the male side electrical connector which concerns on embodiment of this invention from the front side diagonally upward. It is the perspective view seen from the front side diagonally downward of the male side electric connector shown in FIG. It is a front view of the male side electric connector shown in FIG. It is the perspective view which looked at the female side electrical connector fitted to the male side electrical connector shown in FIG. 1 from the front side diagonally upward. It is the perspective view seen from the front side slanting lower part of the female side electrical connector shown in FIG. It is a front view of the female side electrical connector shown in FIG. It is sectional drawing of the female side electrical connector shown in FIG. It is a perspective view of the connector terminal of the female side electrical connector shown in FIG. It is sectional drawing of the connector terminal shown in FIG. FIG. 5 is a plan view for explaining a case where the inner housing of the female electrical connector shown in FIG. 4 is inserted into the outer housing of the male electrical connector shown in FIG. It is AA sectional drawing of an outer housing and an inner housing shown in FIG. FIG. 5 is a plan view for explaining a case where the inner housing of the female electrical connector shown in FIG. 4 is inserted into the outer housing of the male electrical connector shown in FIG. It is BB sectional drawing of an outer housing and an inner housing shown in FIG. 10 is a perspective view showing a receiving connector described in Patent Document 1. FIG. It is a perspective view of the insertion side connector fitted to the receiving side connector shown in FIG. It is a perspective view which shows the male housing of patent document 2. FIG. It is a perspective view of the female housing fitted to the male housing shown in FIG. It is a perspective view which shows the outer housing of the conventional electrical connector. It is a perspective view of the inner housing fitted to the outer housing shown in FIG.

  An electrical connector fitting structure according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the expression “front / rear” represents the side on which the electrical connectors are fitted to each other as “front” and the opposite direction as “rear”. Also, the printed circuit board side on which the electrical connector is surface-mounted is expressed as “down” and the opposite direction as “up”.

A male-side electrical connector 100 shown in FIGS. 1 to 3 is a surface-mounting electrical connector that is mounted on a printed circuit board (not shown) and is connected to a female-side electrical connector 200 (see FIG. 4) to be connected. is there.
The male electrical connector 100 includes a male terminal 110 (male connector terminal), an outer housing 120, and a fixing member (not shown) for fixing to a printed circuit board by soldering or the like.

  Three male terminals 110 are arranged in two horizontal rows in the fitting holes of the outer housing 120, and the male terminals 110 serving as the centers are displaced in two vertical rows, for a total of six. Yes. The male terminal 110 includes a needle-like pin portion 111, a terminal main body portion (not shown), and an external lead portion 113 that is joined to a metal pad of a printed board.

The pin portion 111 is inserted into and contacted with the female connector terminal of the female electrical connector 200. The terminal main body is a portion that is received in the terminal receiving hole of the outer housing 120.
The external lead portion 113 protrudes from the rear end portion of the outer housing 120. A solder connection portion 113a is formed at the front end portion of the external lead portion 113 to be bonded to a metal pad that is a signal terminal of the printed circuit board by solder that is a bonding material.

  The outer housing 120 has a fitting hole 121 into which the female electrical connector 200 to be connected is inserted along the surface direction of the printed circuit board, and includes a ceiling wall part 122, a bottom wall part 123, a side wall part 124, 124 and the back wall part 125 are formed in a box shape having an open front surface. The outer housing 120 is mounted with the bottom surface in contact with the printed circuit board.

  On the inner wall surface of the ceiling wall portion 122, a guide portion 122a for receiving the lock arm of the female-side electrical connector 200 is formed at the center of the opening edge portion. The lock arm of the female electrical connector 200 will be described in detail later. The guide portion 122a is formed with an inclined surface 122c that gradually decreases in thickness toward the opening 121a of the fitting hole 121, and a locking hole 122d for locking the lock arm.

On both sides of the guide portion 122a of the ceiling wall portion 122, key portions 122b (first convex portions) that protrude into the fitting holes 121 are formed. The key portion 122b is formed in a straight line along the fitting direction so as to go from the opening 121a to the back wall portion 125.
The key portion 122b prevents the insertion of a different type of electrical connector as a connection partner, prevents the female-side electrical connector 200 from being inserted while being turned in an inclined state, or enters the fitting hole. It has a function to prevent the insertion posture from being inserted in a state where the insertion posture is inverted upside down.

  On both side edge portions of the inner wall surface of the bottom wall portion 123, linear concave portions 123 a are formed along the fitting direction of the female-side electrical connector 200.

  On the side wall portions 124, 124 on both sides of the ceiling wall portion 122, which is the wall portion on which the key portion 122b is formed, a linear concave portion 124a (first concave portion) is formed at a facing position. The linear recess 124 a can be formed at the end of the side walls 124, 124 in the vertical direction X. For example, when the linear recess 124 a is located in the center portion of the side wall portions 124 and 124 in the top-and-bottom direction X, the inner housing 220 is inserted into the fitting hole 121 of the outer housing 120 even if the top and bottom of the inner housing 220 is reversed. Can be inserted. Accordingly, the linear recess 124a can be formed at the upper end or the lower end of the side wall 124. However, in the outer housing 120 according to the present embodiment, the key portion 122b is formed. It is formed in the lower part on the opposite side to the side.

  In the side wall 124, a linear recess 124a with a thickness notched is formed on the inner wall surface of the side wall 124, but an outer wall surface opposite to the position where the linear recess 124a is formed is formed on a flat surface. Has been.

  A straight convex portion 124 b is formed at the center of the inner wall surface of one of the side wall portions 124, 124. Slot portions 124c for holding the fixing member are formed on the outer wall surfaces of the side wall portions 124, 124.

  Standing wall portions 126 for protecting the solder connection portions 113a of the male terminals 110 are formed on both ends of the outer wall surface of the back wall portion 125 with the solder connection portions 113a of the male terminals 110 interposed therebetween.

  A female electrical connector 200 shown in FIGS. 4 to 7 includes a female terminal 210 (female connector terminal), an inner housing 220, and a lock arm 230.

The female terminal 210 shown in FIGS. 7 to 9 includes a conductive sheath portion 211 inserted into the inner housing 220 and an elastic contact piece 212 provided in the sheath portion 211 in a state of being electrically connected to the sheath portion 211. And a bundling portion 213 that is formed at the rear portion of the sheath-like portion 211 and is used for crimping and fixing a cable (not shown).
The sheath portion 211, the elastic contact piece 212, the bundling portion 213, and the like are integrally formed by bending a metal plate having good conductivity. However, in the electrical connector according to the embodiment of the present invention, the elastic contact piece 212 is configured as a separate component from the sheath portion 211.

The sheath portion 211 is formed by punching a single metal plate and bending the floor surface 211a, both side walls 211b, and the ceiling surface 211d into a substantially rectangular tube shape.
On one side wall 211b of the sheath-like portion 211, a stabilizer 211e for preventing the vertical insertion into the inner housing 220 and stabilizing the posture after the female terminal 210 is inserted into the inner housing 220 is raised. It protrudes at.
Further, on both side walls 211b of the sheath-like portion 211, a notch portion 211f into which the ear portion 212b of the elastic contact piece 212 is fitted is formed.

The elastic contact piece 212 is an arcuate leaf spring disposed on the floor surface 211 a side along the longitudinal direction of the sheath-like portion 211. The elastic contact piece 212 is formed at the position of a leaf spring portion 212a curved like a bow, an ear portion 212b protruding laterally from both sides of the central portion of the leaf spring portion, and a leaf spring portion 212a where the ear portion 212b is formed. And a convex portion 212c that contacts the male terminal 110.
The elastic contact piece 212 has a front end part 212 d and a rear end part 212 e supported by the floor surface 211 a of the sheath-like part 211, and an ear part 212 b located at the center part formed on both side walls 211 b of the sheath-like part 211. By fitting in the notch portion 211f and suppressing displacement toward the ceiling surface 211d, the tip portion 212d and the rear end portion 212e function as bow-shaped leaf springs even if they are free ends.
The convex portion 212c is formed by an arcuate surface that bulges out from the back surface that is opposite to the contact surface of the leaf spring portion 212a.

  As shown in FIGS. 4 to 7, the inner housing 220 has a rectangular parallelepiped shape and has a terminal accommodating chamber 220 a that accommodates the female terminals 210. The terminal accommodating chambers 220a are arranged three by three so as to face each other in two upper and lower stages, corresponding to the arrangement of the male terminals 110 of the male electrical connector 100 (see FIG. 3).

On the front surface 221 in the fitting direction of the inner housing 220, a terminal insertion port 221a, a drawing jig insertion port 221b, and a lance opening 221c are formed.
The terminal insertion port 221a is an opening for inserting and connecting the male terminal 110 to the female terminal 210 accommodated in the terminal accommodating chamber 220a. The extraction jig insertion port 221b is an opening for inserting a jig for extracting the female terminal 210. The lance opening 221c is an opening of a release space 220b (see FIG. 7) described later in detail.
A bottom wall portion 222 which is an outer wall portion on the bottom side of the inner housing 220 is a thin portion 222a whose thickness is reduced by the lance opening 221c. The partition wall 221d that separates the extraction jig insertion port 221b and the lance opening 221c is also a thin portion 222a.

At the lower part of the outer wall surface of both side wall parts 223 of the inner housing 220, a linear convex part 223a (second convex part) is fitted along the fitting direction so as to be fitted into the linear concave part 124a of the outer housing 120. Is formed. Since the linear convex portion 223 a is formed on the lower part of the outer wall surface of both side wall portions 223 of the inner housing 220, the linear convex portion 223 a becomes a position corresponding to the thin wall portion 222 a of the bottom wall portion 222. Yes. At the center of the outer wall surface of one side wall 223, a linear recess 223b that fits into the linear protrusion 124b is formed along the fitting direction.
On the outer wall surface of the ceiling wall portion 224 of the inner housing 220, linear groove portions 224 a (second concave portions) into which the key portions 122 b of the outer housing 120 are fitted are formed on both sides of the lock arm 230.

Here, the thin portion 222a will be described in detail with reference to FIG.
When the female terminal 210 is accommodated in the terminal accommodating chamber 220a, the female terminal 210 is locked by the lance portion 225. The lance part 225 is formed of a claw part 225 a that is sharpened toward the female terminal 210 at the tip and is engaged with the female terminal 210, and an elastic thin plate part 225 b that is connected from the claw part 225 a to the front surface 221. Yes. Since the female terminal 210 is engaged with the claw portion 225a, it is prevented from being pulled out.

When pulling out the female terminal 210, a pulling jig (not shown) is inserted into the pulling jig insertion port 221b to move the lance 225 away from the female terminal 210 (release direction). Then, the elastic thin plate portion 225b is pressed by the extraction jig, and the elastic thin plate portion 225b is bent together with the claw portion 225a to the release space 220b side, so that the locked state of the claw portion 225a to the female terminal 210 is released. Is done.
By pulling the unlocked female terminal 210 from the rear end of the inner housing 220, the female terminal 210 is pulled out from the inner housing 220.

  As described above, the inner housing 220 is formed with the release space 220 b for retracting the lance portion 225 and releasing the lock from the female terminal 210 when the female terminal 210 is pulled out.

  The release space 220b is formed in the inner housing 220, and the bottom wall 222 is formed thin. For example, it is assumed that the inner housing has no bottom wall portion 222 and the release space 220b is exposed to the outside. In that case, if the extraction jig is moved largely in the release direction, there is no wall part against which the extraction jig abuts, and thus the lance part 225 may be excessively displaced. However, since the bottom wall portion 222 that separates the release space 220b from the outside is formed like the inner housing 220, the movement of the extraction jig to be displaced outward from the bottom wall portion 222 is restricted. Therefore, the bottom wall portion 222 cannot be omitted. Accordingly, the bottom wall portion 222 that separates the release space 220b from the outside is formed as a thin portion 222a. Further, a partition wall 221d that separates the lance opening 221c, which is the opening of the release space 220b, and the extraction jig insertion port 221b is also formed as a thin portion 222a.

  In the inner housing 220 according to the present embodiment, the concave portion is provided in the central portion of the bottom wall portion 222, so that the slit portion 222b that communicates with the release space 220b in the bottom wall portion 222 (see FIG. 5). ) Is formed. The slit portion 222b is a space where the release space 220b is thin in the height direction. For this reason, in the mold for molding the inner housing 220 with resin, the thickness of the plate portion for securing the release space 220b becomes thin, so that the strength of the plate portion cannot be secured. Therefore, ribs are formed on the plate portion in order to reinforce the plate portion of the mold. The rib portion of the plate portion is formed in the inner housing 220 as the slit portion 222b. A plate portion is formed as the lance opening 221c.

  Further, the bottom wall portion 222 is formed with a linear convex portion 222 c that fits into the linear concave portion 123 a of the outer housing 120.

As shown in FIGS. 4 to 7, the lock arm 230 includes a front end portion 231 connected to the inner housing 220, an arm main body 232 supported by the front end portion 231, and a release operation portion 233 for operating the lock release. And a rear end portion 234 connected to the inner housing 220 and positioned below the release operation portion 233.
The front end portion 231 is elastically deformed when the release operation portion 233 is pushed down. The arm main body 232 is formed with a locking claw portion 235 that is locked to the outer housing 120 of the male electrical connector 100 to be locked. The release operation part 233 is formed to extend from the middle part of the arm main body 232 upward to the rear end part 234.

  When the release operation part 233 is pushed down, the lock arm 230 is bent with the arm main body 232 using the front end part 231 and the rear end part 234 as a fulcrum, the release operation part 233 comes into contact with the rear end part 234, and then the front end part 231. The arm body 232 bends with the contact portion between the release operation portion 233 and the rear end portion 234 as a fulcrum, so that the locked state of the male electrical connector 100 with the outer housing 120 is released.

A state when the male electrical connector 100 and the female electrical connector 200 according to the present embodiment configured as described above are fitted to each other will be described with reference to the drawings.
First, a case where the female electrical connector 200 is inserted into the fitting hole 121 of the male electrical connector 100 in a state where the insertion posture is normal will be described with reference to FIGS. 10 and 11.

As shown in FIGS. 10 and 11, when the female electrical connector 200 is inserted into the fitting hole 121 of the male electrical connector 100 in a normal insertion posture, the lock arm 230 of the inner housing 220 is moved to the outer side. It is inserted into the guide part 122 a of the ceiling wall part 122 of the housing 120. The linear groove portion 224 a of the ceiling wall portion 224 of the inner housing 220 is fitted into the key portion 122 b of the ceiling wall portion 122 of the outer housing 120.
Further, the linear convex portion 223 a of the side wall portion 223 of the inner housing 220 is fitted into the linear concave portion 124 a of the side wall portion 124 of the outer housing 120. Further, the linear concave portion 223 b of the side wall portion 223 of the inner housing 220 is fitted into the linear convex portion 124 b of the side wall portion 124 of the outer housing 120.
Further, the linear convex portion 222 c of the bottom wall portion 222 of the inner housing 220 is fitted into the linear concave portion 123 a of the bottom wall portion 123 of the outer housing 120.

  In this way, the convex portion and the concave portion of the outer wall surface of the inner housing 220 are fitted into the concave portion and the convex portion of the inner wall surface of the outer housing 120, respectively, so that the female-side electrical connector 200 becomes the male-side electrical connector. 100 fitting holes 121 are inserted.

  Next, when the operator inserts the female electrical connector 200 into the fitting hole 121 of the male electrical connector 100, the insertion posture of either the male electrical connector 100 or the female electrical connector 200 is set as follows. The ceiling wall part 122 and the bottom wall part 123 are exchanged (a pair of side wall parts 124 and 124), or the ceiling wall part 224 and the bottom wall part 222 are exchanged (a pair of side wall parts 223 and 223). The case where the top and bottom are reversed will be described with reference to FIGS.

As shown in FIGS. 12 and 13, when either the male-side electrical connector 100 or the female-side electrical connector 200 is turned upside down, the linear convex portion 124 b of the side wall portion 124 of the outer housing 120 is changed to the inner housing 220. Abuts on the front surface 221.
Further, the front end 231 of the lock arm 230 of the inner housing 220 abuts against the bottom wall 123 of the outer housing 120.

  Even if the linear convex portion 124 b of the outer housing 120 abuts on the front surface 221 of the inner housing 220 or the lock arm 230 of the inner housing 220 abuts on the bottom wall portion 123 of the outer housing 120, the inner housing 220 Since the front surface 221 portion and the bottom wall portion 123 of the outer housing 120 have a firm wall thickness, the insertion only stops and is not damaged.

At this time, the key portion 122 b of the ceiling wall portion 122 of the outer housing 120 contacts a part of the bottom wall portion 222 of the inner housing 220. Further, the key portion 122b interferes with the partition wall 221d that separates the lance opening 221c and the extraction jig insertion port 221b.
A part of the bottom wall part 222 with which the key part 122b abuts and the partition wall 221d are formed as a thin part 222a. Since the thin wall portion 222a is formed to be thinner than other contact portions, the inner housing 220 is forcibly pushed into the outer housing 120 with the key portion 122b in contact with the thin wall portion 222a. Otherwise, the thin portion 222a may be broken or cracked.

However, the side wall part 223 of the inner housing 220 according to the present embodiment is formed with a linear convex part 223a that fits into the linear concave part 124a of the outer housing 120, and this linear convex part 223a is the outer housing. By abutting on the side wall part 124 of 120, the pressing force to the thin part 222a by the key part 122b is reduced.
In particular, the linear concave portion 124a of the outer housing 120 into which the linear convex portion 223a is fitted is formed at the end portion of the side wall portion 124 opposite to the side on which the key portion 122b is formed. Therefore, in a state where the inner housing 220 is inverted upside down, the linear convex portion 223a is an opening edge portion of the fitting hole 121 and abuts on an end portion of the side wall portion 124 on the key portion 122b side. Accordingly, the pressing force applied to the thin portion 222a by the key portion 122b is reduced by the linear convex portion 223a coming into contact with the side wall portion 124 at a position close to the key portion 122b.

  Moreover, since the linear convex part 223a of the inner housing 220 is formed so as to correspond to the position where the thin part 222a is formed, if it is inserted into the outer housing with the inner housing inverted, the straight line The convex portion 223 a contacts the side wall portion 124 of the outer housing 120. Accordingly, the pressing force applied to the thin wall portion 222 a by the key portion 122 b is reduced by the linear convex portion 223 a coming into contact with the side wall portion 124.

  Therefore, even if an operator mistakenly tries to insert the inner housing 220 into the fitting hole 121 of the outer housing 120 with the insertion posture of the inner housing 220 inverted, the thickness of the bottom wall portion 222 is reduced by the release space 220b. If the partition wall 221d that separates the extraction jig insertion port 221b and the lance opening 221c is the thin wall portion 222a, the thin wall portion 222a is damaged. Can be prevented. Therefore, the electrical connector fitting structure according to the present embodiment can achieve high reliability.

  Moreover, the linear recessed part 124a of the outer housing 120 is formed in the position (position where it becomes the same height from the bottom wall part 123) where the side wall parts 124 and 124 oppose, and the linear convex part 223a of the inner housing 220 is linear. It protrudes from each of the side wall parts 223 and 223 corresponding to the recessed part 124a. Therefore, even if the linear protrusion 223a has a small protrusion amount from the side walls 124, 124 by the linear protrusion 223a, the protrusion amount can be the sum of the pair of linear protrusions 223a. The convex portion 223a can be firmly brought into contact with the side wall portion 124 of the outer housing 120, so that the thin portion 222a can be protected and the strength of the linear convex portion 223a can be improved.

  For example, if the linear convex portion 223a is formed near the center portion in the vertical direction of the side wall portion 223, the inner housing 220 is forcedly inserted into the fitting hole 121 of the outer housing 120 in an insertion posture in which the operator is inverted upside down. If it tries to push in, the linear convex part 223a may bend into the fitting hole 121, rubbing against the side wall part 124 by bending the side wall parts 124, 124 of the outer housing 120 outward and inflating. If it becomes so, there exists a possibility that the thin part 222a may be damaged because the key part 122b presses the thin part 222a.

  However, in the present embodiment, since the linear convex portion 223a is formed at the end of the side wall portion 223 in the vertical direction X, the side wall portion 124 of the outer housing 120 with which the linear convex portion 223a abuts is the ceiling wall portion. Since it is close to the connection portion with 122, it is difficult to deform. Accordingly, it is possible to restrict the inner housing 220 in the inverted state from being pushed into the fitting hole 121 of the outer housing 120.

Since the outer wall surface opposite to the position where the linear concave portion 124a is formed is a flat surface, the side wall portion 124 projects the outer wall portion of the side wall portion 124 according to the depression of the linear concave portion 124a. The lateral width of the outer housing 120 can be reduced as compared with the one.
In the electrical connector fitting structure according to the present embodiment, the thin wall portion 222a is the bottom wall portion 222 thinned by the release space 220b, but may be another thin wall portion.

  INDUSTRIAL APPLICABILITY The present invention is suitable for electrical connectors widely used in fields such as the automobile industry, electrical / electronic equipment industry, and various machine industries as a means for connecting electric wires that conduct electrical signals.

DESCRIPTION OF SYMBOLS 100 Male side electrical connector 110 Male terminal 111 Pin part 113 External lead part 113a Solder connection part 120 Outer housing 121 Fitting hole 121a Opening part 122 Ceiling wall part 122a Guide part 122b Key part (1st convex part)
122c Inclined surface 122d Locking hole 123 Bottom wall portion 123a Linear concave portion 124 Side wall portion 124a Linear concave portion (first concave portion)
124b Straight convex part 124c Slot part 125 Back wall part 126 Standing wall part 200 Female electrical connector 210 Female terminal 211 Sheath part 211a Floor surface 211b Side wall 211d Ceiling surface 211e Stabilizer 211f Notch part 212 Elastic contact piece 212a Leaf spring part 212b Ear portion 212c Protruding portion 212d Front end portion 212e Rear end portion 213 Bundling portion 220 Inner housing 220a Terminal accommodating chamber 220b Release space 221 Front surface 221a Terminal insertion port 221b Extraction jig insertion port 221c Lance opening 221d Partition wall 222 Bottom Wall part 222a Thin part 222b Slit part 222c Linear convex part 223 Side wall part 223a Linear convex part (2nd convex part)
223b Straight recess 224 Ceiling wall 224a Straight groove (second recess)
225 Lance part 225a Claw part 225b Elastic thin plate part 230 Lock arm 231 Front end part 232 Arm body 233 Release operation part 234 Rear end part 235 Locking claw part X Vertical direction

Claims (7)

A fitting structure of an electrical connector by an outer housing having a fitting hole and an inner housing inserted into the fitting hole,
The outer housing includes a first protrusion protruding from an inner wall surface of the fitting hole, and a first recess formed on the inner wall surfaces of the side wall portions on both sides of the wall portion on which the first protrusion is formed. And
The inner housing has a second concave portion that guides the first convex portion and a front surface that faces the outer housing when fitted to the outer housing . When inserting with the insertion posture reversed upside down, the thin hole portion that interferes with the first convex portion, and the opening of the fitting hole along the direction in which the outer housing and the inner housing are fitted together A second portion that is formed from a position that is aligned with the first portion and that projects from the outer wall surface of the side wall portion that is connected to the wall portion provided with the second concave portion and that fits into each of the first concave portions. The fitting structure of the electrical connector provided with the convex part.   The thin-walled portion is a release space for unlocking and unlocking the lance portion that is locked to the connector terminal accommodated in the inner housing and prevents the connector terminal from being pulled out. The electrical connector fitting structure according to claim 1, which is an outer wall portion whose thickness is reduced by the release space having a portion. 2. The electrical connector fitting structure according to claim 1, wherein the first recess is formed of a pair and is formed at a position facing an inner wall surface of the side wall portion of the outer housing . The electrical connector fitting structure according to claim 1, wherein the first recess is formed at an end portion of the side wall portion of the outer housing in the vertical direction.   5. The electrical connector fitting structure according to claim 4, wherein the first concave portion is formed at an end portion opposite to the top-and-bottom direction from the side on which the first convex portion is formed. The side wall portion of the outer housing has an outer wall surface corresponding to a position where the first concave portion is formed in the thickness direction while the thickness of the side wall portion is notched to form the first concave portion. The electrical connector fitting structure according to any one of claims 1 to 4, wherein is formed on a flat surface.   The electrical connector fitting structure according to claim 1, wherein the second convex portion is formed corresponding to a position where the thin portion is formed.

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