JP2014059960A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress longitudinal play between housings.SOLUTION: In a watertight connector 10 having a male housing 20 and a female housing 30 capable of fitting together, a lock projection 22 projectingly formed on the male housing, and a lock arm 38 disposed for resilient deformation on the female housing 30 and capable of engaging with the lock projection 22 to lock both housings 20, 30 in a fit state, the lock arm 38 has a front engaging portion 41 formed so as to abut and engage with the lock projection 22 from the front when both housings 20, 30 are in the normal fit state, and rear engaging portions 43 formed so as to abut and engage with a rear engagement portion 27 disposed on the male housing from the rear when the front engaging portion 41 abuts the lock projection 22 from the front.

Description

  The present invention relates to a connector.

  Conventionally, Patent Document 1 below discloses a connector that locks both housings in a normal fitting state by locking a lock arm provided in one housing and a lock protrusion provided in the other housing. The ones described are known. The front end portion in the fitting direction of the lock arm is a locking portion that can be locked with the lock protrusion. When the two housings are fitted together, the locking portion rides on the lock projection, and the lock arm is elastically deformed. And when both housings are in a proper fitting state, the locking part gets over the locking protrusion, the locking arm is elastically restored, and the locking part is locked to the locking protrusion from the front in the fitting direction. As a result, both housings are locked in the proper fitted state.

JP 2012-54186 A

  By the way, in this type of connector, there is a case where a gap in the front-rear direction is generated between both housings due to manufacturing intersection or assembly intersection. For this reason, for example, when the above connector is connected to the end of an electric wire routed in the vehicle, there is a possibility that the housing will be damaged due to the back and forth rattling between the housings due to the vibration of the vehicle. In addition, with this rattling, the terminals provided on both housings slide in the front-rear direction, and there is a risk that the connecting portion between the terminals will wear.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to suppress backlash in the front-rear direction between housings.

  The present invention is provided with a pair of housings that can be fitted to each other, a lock projection that protrudes from one of the housings, and an elastically deformable provided on the other housing. When the pair of housings are elastically deformed by being pressed by the lock protrusions, and the pair of housings reach a normal fitting state, the lock protrusions are overcome to engage the lock protrusions and the pair of housings are fitted. A lock arm that locks in a mated state, wherein the lock arm includes a front engagement that abuts against the lock protrusion from the front in the mating direction when the pair of housings is in a properly mated state. A stop portion is formed, and when the front locking portion comes into contact with the lock protrusion from the front in the fitting direction, a rear locked portion provided in the one housing rear Characterized in place that side locking portion is formed after the contact from.

  According to the connector having such a configuration, when the pair of housings are brought into a normal fitting state, the pair of housings move in a direction in which the pair of housings are separated from each other by the front side locking portion coming into contact with the lock protrusion from the front. It is possible to prevent the pair of housings from moving in a direction in which the pair of housings are engaged with each other by preventing the rear locking portion from coming into contact with the rear locked portion from the rear. Thereby, the backlash of the front-back direction between the housings in a regular fitting state can be suppressed, and the housing can be prevented from being damaged or the connecting portion between the terminals being worn away.

The following configuration is preferable as an embodiment of the present invention.
The lock arm has a flat plate shape, and by forming a lock hole penetrating in the thickness direction with respect to the lock arm, a front side portion of the lock hole serves as a front locking portion, and the rear engagement The stop portion is formed to be recessed in the surface on which the lock protrusion is formed in the one housing, and the rear locking portion is opposed to the surface on which the lock protrusion is formed in the lock arm. It is good also as a structure protruding and formed in the surface to perform.
For example, a protruding rear-side locked portion is formed on the surface on which the lock protrusion is formed, and the rear-side locking portion locked with the rear-side locked portion is recessed with respect to the lock arm. When formed in the shape, not only the lock hole but also the recessed rear locking portion is formed in the lock arm, so that the rigidity of the lock arm is lowered. However, according to the configuration described above, the rear locking portion can be formed on the lock arm without reducing the rigidity of the lock arm.

An escape groove through which the rear locked portion passes when the pair of housings are fitted may be formed on the surface of the one housing where the locking projection is formed.
For example, when the escape groove is not formed on the surface on which the lock protrusion is formed, when the pair of housings are fitted, the surface on which the lock protrusion is formed and the rear locking portion come into sliding contact with the rear side. There is a risk of damage to the locking portion. However, according to said structure, it can prevent that a rear side latching | locking part damages because a rear side latching | locking part escapes and passes in the inside of a groove | channel.

The rear locking portion may be configured to have a rounded shape.
For example, if the portion of the rear locking portion that contacts the rear locked portion is formed flat, if the rear locking portion becomes slightly larger due to manufacturing tolerances, the rear locking portion and the rear locking portion If the position where the side locked portion abuts is shifted, there is a possibility that the rear locking portion cannot be firmly brought into contact with the rear locked portion from behind. However, according to the above configuration, since the rear locked portion is rounded, even if the abutting position is slightly shifted, this shift can be absorbed, and the rear locking portion is moved to the rear. It can be firmly brought into contact with the side locked portion from behind.

The one housing is provided with a pair of protective walls covering both sides in the width direction of the lock projection, and the rear locked portion is formed in a groove shape extending in the width direction between the pair of protective walls. It is good also as a structure which is continued and formed in the width direction with the through-hole penetrated below the said protective wall in the width direction.
According to such a configuration, even when water, dust, or the like enters the groove-shaped rear locked portion, water or dust in the rear locked portion can be quickly discharged from the through hole to the outside. Can do. As a result, it is possible to prevent the locking of the rear locked portion and the rear locking portion from becoming unstable due to the attachment of water, dust, or the like in the rear locked portion.

The front locking portion may be formed at a central portion in the width direction of the lock arm, and the rear locking portion may be formed at both widthwise end portions of the lock arm.
According to such a configuration, it is more stable that the pair of housings move in the fitting direction than in the case where the front side locking portion and the rear side locking portion are each formed at one location in total. And can be suppressed. In addition, for example, even if a twisting force or a rolling force is applied to the housing, the front side locking portion and the two rear side locking portions are in contact with each other at a total of three locations. Compared to the case where the two abuts, the back and forth rattling between the pair of housings can be further suppressed.

  According to the present invention, an object is to suppress back and forth rattling between housings.

The top view which shows the state before the fitting of a female side housing and a male side housing The top view which shows the state which the female side housing and the male side housing fitted. Perspective view of female housing Front view of female housing Perspective view of male housing Front view of male housing FIG. 5 is a cross-sectional view illustrating a state in which the female housing and the male housing are approximately half-fitted, and is a cross-sectional view corresponding to a cross section taken along line AA in FIG. 4. FIG. 5 is a cross-sectional view showing a state immediately before the lock arm rides on the lock protrusion, and is a cross-sectional view corresponding to a cross section taken along line AA of FIG. FIG. 5 is a cross-sectional view showing a state where the lock arm rides on the lock protrusion, and is a cross-sectional view corresponding to a cross section taken along line AA of FIG. FIG. 5 is a cross-sectional view showing a state in which the female housing and the male housing are fitted, and is a cross-sectional view corresponding to a cross section taken along the line AA of FIG. FIG. 6 is a cross-sectional view showing a state immediately before the lock arm rides on the lock protrusion, and is a cross-sectional view corresponding to a cross section taken along line BB in FIG. FIG. 5 is a cross-sectional view showing a state in which a lock arm rides on a lock protrusion, and is a cross-sectional view corresponding to a cross section taken along line BB in FIG. Sectional drawing which shows the state which the female side housing and the male side housing fitted, Comprising: Sectional drawing corresponded in the cross section in the BB line of FIG.

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, a waterproof connector (an example of a “connector”) 10 connected to a terminal of an electric wire W of a vehicle is illustrated. The waterproof connector 10 includes a male housing (corresponding to “one housing”) 20 and a female housing (corresponding to “other housing”) 30 which are fitted to each other. In the following description, the vertical direction refers to the vertical direction in FIG. 4, and the front-rear direction refers to the mating directions based on the mating direction of the male housing 20 and female housing 30 in FIG. The direction to be performed will be described as the front.

  As shown in FIG. 7, the male housing 20 has a small hood portion 21 that protrudes forward from a case M of a synthetic resin device. In FIG. 5, the case of the device is not shown. As shown in FIG. 5 and FIG. 6, the small hood portion 21 has a hood shape that opens forward, and the shape seen from the front is a substantially rectangular shape that is horizontally long in the width direction and rounded at the corners. Yes. On the upper surface 21 </ b> A of the small hood portion 21, a lock protrusion 22 is provided so as to protrude. As shown in FIG. 7, the lock protrusion 22 is formed at a substantially central portion in the front-rear direction of the small hood portion 21, and has a locked surface 23 that rises straight upward from the upper surface 21 </ b> A of the small hood portion 21. Then, after extending forward from the upper end of the locked surface 23, it has a shape having an inclined surface 24 that extends obliquely downward and forward. Of the inclined surface 24, the upper side is a gentle slope 24U having a relatively gentle slope, and the lower side is a steep slope 24D having a relatively steep slope.

On the upper surface 21A of the small hood portion 21, a pair of protective walls 25 are formed on both sides in the width direction of the lock projection 22 as shown in FIGS. The protective wall 25 extends forward from the case M of the device and extends further forward than the lock protrusion 22, and covers both side surfaces of the lock protrusion 22 in the width direction.
A plurality (four in this embodiment) of male terminals 26 projecting into the internal space of the small hood portion 21 are provided on the back wall of the small hood portion 21. The male terminal 26 has a pin shape and is provided at an interval in the width direction.

On the other hand, the female housing 30 is made of synthetic resin, and, as shown in FIG. 7, a terminal accommodating portion 31 that accommodates a female terminal 50 connected to the terminal of the electric wire W, and an outer periphery of the terminal accommodating portion 31. And a large hood portion 32 that covers the surface.
As shown in FIGS. 7 to 13, the terminal accommodating portion 31 is fitted into the small hood portion 21 of the male housing 20 with the fitting of the male housing 20 and the female housing 30. It has become. Moreover, the terminal accommodating part 31 is penetrated and formed in the front-back direction, and the female terminal 50 is accommodated in the inside of the terminal accommodating part 31 from back.

  The female terminal 50 includes a connecting cylinder part 51 into which the male terminal 26 of the small hood part 21 is inserted, and a barrel part 52 formed continuously from the rear of the connecting cylinder part 51. In connection tube part 51, male terminal 26 of small hood part 21 is inserted with fitting of terminal accommodating part 31 and small hood part 21, and connection cylinder part 51 and male terminal 26 are electrically connected. Connected. The barrel portion 52 has a total of four caulking pieces 53 of a pair of front and rear, the front caulking piece 53 is crimped to the core wire exposed at the end of the electric wire W, and the rear caulking piece 53 is attached to the electric wire W. The female terminal 50 is connected to the end of the electric wire W by being crimped to the externally fitted cylindrical rubber stopper G.

  A resin lance 33 is formed inside the terminal accommodating portion 31, and the resin lance 33 locks the female terminal 50 inserted into the terminal accommodating portion 31 from the rear, thereby allowing the inside of the terminal accommodating portion 31. The female terminal 50 is prevented from coming off. Further, when the female terminal 50 is accommodated in the terminal accommodating portion 31, the rubber plug G attached to the electric wire W is brought into close contact with the inner peripheral wall of the terminal accommodating portion 31, and the terminal accommodating portion from the rear of the terminal accommodating portion 31. Water is prevented from entering 31.

A front retainer 34 is attached to the front portion of the terminal accommodating portion 31. The front retainer 34 is configured to cover the front portion of the terminal accommodating portion 31, and includes a locking portion (not shown) provided on the front retainer 34 and a locked portion (not shown) formed on the terminal receiving portion 31. By engaging, the front retainer 34 is held in the terminal accommodating portion 31.
As shown in FIGS. 3 and 4, a plurality of filling ribs 35 extending in the front-rear direction are formed on the outer peripheral surface of the front retainer 34 at intervals in the circumferential direction. The loose ribs 35 are configured to prevent the terminal accommodating portion 31 from rattling in the circumferential direction in the small hood portion 21 when the terminal accommodating portion 31 is fitted in the small hood portion 21. .

  As shown in FIG. 7 to FIG. 13, the rear side of the outer peripheral surface of the terminal accommodating portion 31 is connected to the inner peripheral surface of the small hood portion 21 when the terminal accommodating portion 31 is fitted in the small hood portion 21. A seal ring 36 that seals between the outer peripheral surface of the terminal accommodating portion 31 is fitted. The seal ring 36 is prevented from coming forward by a front retainer 34.

The large hood portion 32 is formed in a hood shape that opens toward the front, and the small hood portion 21 of the male housing 20 is fitted inside the large hood portion 32 as the two housings 20 and 30 are fitted. It is supposed to be combined.
As shown in FIGS. 1 and 3, the large hood portion 32 is opened upward, and a flat plate-like lock arm 38 extending in the front-rear direction is provided in the upper opening 37. The lock arm 38 is connected to the upper opening edge portion of the large hood portion 32 through a pair of connecting portions 39 provided on both sides in the width direction at a substantially central portion in the front-rear direction of the lock arm 38. Therefore, the lock arm 38 can be elastically deformed like a seesaw with the pair of connecting portions 39 as fulcrums.

  As shown in FIGS. 7 to 10, a lock hole 40 penetrating in the plate thickness direction (vertical direction) is formed in the front portion of the lock arm 38. The front end portion is a front locking portion 41. The rear surface of the front locking portion 41 is slightly inclined rearward and rearward, and is a locking surface 42 that can be locked with the locked surface 23 of the locking projection 22 of the small hood portion 21. For this reason, when the small hood portion 21 is fitted in the large hood portion 32 with the fitting of the housings 20 and 30, the front side locking portion 41 of the lock arm 38 is fitted to the gentle slope 24 U of the lock projection 22. As shown in FIG. 9, the lock arm 38 is elastically deformed with the connecting portion 39 as a fulcrum. Then, when the large hood portion 32 and the small hood portion 21 reach the proper fitting state, the lock projection 22 is fitted into the lock hole 40 and the lock arm 38 is elastically restored, as shown in FIG. The locking surface 42 of the front locking portion 41 locks the locked surface 23 of the locking projection 22 from the front, so that both housings 20 and 30 are locked in the fitted state.

  Further, when the locking surface 42 of the front locking portion 41 locks the locked surface 23 of the locking projection 22, the clearance C that widens between the locking surface 42 and the locked surface 23 toward the upper side. When the lock arm 38 is elastically deformed and the front locking portion 41 is displaced in a substantially arc shape, the front locking portion 41 and the lock protrusion 22 do not interfere with each other. ing.

  Further, the rear end portion of the lock arm 38 is a release operation portion 44, and by pressing this release operation portion 44, the lock arm 38 is elastically deformed, and the front side locking portion 41 of the lock arm 38 is connected. The locked state with the lock protrusion 22 can be released.

  As shown in FIGS. 1 and 5, the upper surface 21 </ b> A of the small hood portion 21 is provided with a groove-like rear locked portion 27 extending in the width direction. As shown in FIG. 10, when the front locking portion 41 comes into contact with the lock protrusion 22 from the front, the rear locking portion 27 is fitted to the rear locking portion 27 so that it is rearward of the inner wall of the rear locking portion 27. A pair of rear locking portions 43 that come into contact with each other protrudes.

  As shown in FIG. 4, the pair of rear locking portions 43 are formed on the lower surface of the lock arm 38 facing the upper surface 21 </ b> A of the small hood portion 21, and are arranged on both sides in the width direction of the lock hole 40. . Each rear locking portion 43 is formed across the entire width from the opening edge of the lock hole 40 to the end portion in the width direction of the lock arm 38. As shown in FIGS. The round shape is rounded.

  On the other hand, as shown in FIGS. 1 and 7, the rear locked portion 27 is formed by denting the upper surface 21 </ b> A of the small hood portion 21 into a concave groove shape, and the base portion of the protective wall 25 is formed in the width direction. And a through-hole 28 having an inverted trapezoidal shape and extending in the width direction and extending to the outside of both protective walls 25. As a result, even when water, dust, or the like has entered the rear side locked portion 27, the water in the rear side locked portion 27 can be removed from the through holes 28 on both sides in the width direction of the rear side locked portion 27. Dust can be quickly discharged to the outside, and water or dust or the like adheres to the rear side locked portion 27, so that the relationship between the rear side locked portion 27 and the rear side locking portion 43 is increased. It is possible to prevent the stop from becoming unstable.

  The rear locked portion 27 is disposed adjacent to the front of the lock protrusion 22, and the rear inner wall 27 </ b> A at the substantially central portion in the width direction of the rear locked portion 27 is the lock protrusion 22. It is flush with the steep slope 24D. Moreover, the width direction both sides of the locking protrusion 22 in the rear inner wall 27A of the rear locked portion 27 are locked from the rear by the rear locking portion 43, and this portion is a pair of By being locked from behind by the rear locking portion 43, the housings 20 and 30 are prevented from moving in a direction in which they are fitted to each other.

  That is, when both the housings 20 and 30 reach the proper fitting state, the front side locking portion 41 comes into contact with the lock protrusion 22 from the front and locks the locked surface 23, so that both the housings 20 and 30 are locked. The movement in the direction of detachment from each other is suppressed, and the rear locking portion 43 abuts the rear locked portion 27 from behind and locks the rear inner wall 27A, so that the housings 20 and 30 are fitted to each other. Moving in the direction of joining is suppressed. Thereby, the shakiness of the front-back direction between both the housings 20 and 30 in a regular fitting state can be suppressed.

  In addition, as shown in FIG. 2, since the shape connecting the front side locking portion 41 and the two rear side locking portions 43 is triangular so that it is locked at a total of three locations, Even if a twisting force or a rolling force is applied to the housing, the back and forth rattling between the housings 20 and 30 can be reliably suppressed. That is, the backlash in the front-rear direction between the two housings 20 and 30 is more stable than the case where the backlash in the front-rear direction between the two housings is suppressed by a total of two locking portions formed one by one on the front and rear. And can be suppressed.

  Further, as shown in FIGS. 5 and 6, the rear side of the lock arm 38 when the two housings 20 and 30 are fitted in front of the rear side locked portion 27 on the upper surface 21 </ b> A of the small hood portion 21. A pair of escape grooves 29 through which the locking portion 43 can pass are formed. The pair of escape grooves 29 have a concave shape when viewed from the front, and are formed straight from the front opening edge of the small hood portion 21 toward the rear. Further, the length dimension of the escape groove 29 in the front-rear direction is such that the lock arm 38 starts from when the rear locking portion 43 reaches the front opening edge of the small hood portion 21 when the housings 20 and 30 are fitted together. The dimension is set to be slightly longer than the distance that the rear locking portion 43 has moved in the front-rear direction until it rides on the lock projection 22 of the small hood portion 21. Thereby, when fitting both the housings 20 and 30, it can prevent that the rear side latching | locking part 43 contacts with the small hood part 21, and is damaged.

The waterproof connector 10 of the present embodiment has the above-described configuration, and the operation and effect of the waterproof connector 10 will be described next.
First, the female housing 30 in which the female terminal 50 is accommodated is arranged opposite to the male housing 20 provided in the case M of the device, and as shown in FIG. The hood portion 21 is fitted into the large hood portion 32 of the female side housing 30, and the terminal accommodating portion 31 of the female side housing 30 is fitted into the small hood portion 21.

  When the locking projection 22 of the small hood portion 21 is accommodated in the large hood portion 32, the male terminal 26 of the male housing 20 is connected to the female terminal in the terminal accommodating portion 31 as shown in FIGS. The rear locking portion 43 of the lock arm 38 begins to pass through the escape groove 29 while starting to enter the 50 connecting cylinder portions 51. Thereby, it can prevent that the rear side latching | locking part 43 contacts the small hood part 21, and is damaged. At this time, the front locking portion 41 of the lock arm 38 contacts the gentle slope 24U of the lock projection 22.

If both housings 20 and 30 are further fitted in this state, as shown in FIGS. 9 and 12, the seal ring 36 externally fitted to the terminal accommodating portion 31 is connected to the inner peripheral surface of the small hood portion 21 and the terminal accommodating portion 31. It is in close contact with the outer peripheral surface, and the space between the small hood portion 21 and the terminal accommodating portion 31 is sealed. Further, the front side locking portion 41 of the lock arm 38 rides on the lock protrusion 22, and the lock arm 38 is elastically deformed with the connecting portion 39 as a fulcrum.
When both the housings 20 and 30 reach the proper fitting state, the lock projection 22 is fitted into the lock hole 40, and the lock arm 38 is elastically restored. Then, as shown in FIGS. 10 and 13, the locked surface 23 of the locking projection 22 is locked from the front by the locking surface 42 of the front locking portion 41, and the pair of rear sides of the lock arm 38 The locking portion 43 is fitted into the rear locked portion 27, and the rear inner wall 27A of the rear locked portion 27 is locked from the rear by the rear locking portion 43. Thereby, it can suppress that both housings 20 and 30 mutually move to both a fitting direction and a detachment | leave direction.

  That is, when the housings 20 and 30 are properly fitted, rattling does not occur between the housings 20 and 30 due to the vibration of the vehicle. It is possible to prevent the housing 30 from being damaged. Further, it is possible to prevent the connection portion between the male terminal 26 and the female terminal 50 from being worn due to rattling.

  By the way, if the part that contacts the rear locked part is formed flat in the rear locking part, if the rear locking part becomes slightly larger due to the manufacturing intersection, the rear locking part and There is a possibility that the rear locking portion cannot be firmly brought into contact with the rear locked portion from the rear because the position where the rear locked portion is brought into contact with the rear locked portion is shifted. However, according to the present embodiment, as shown in FIG. 7, since the rear side locking portion 43 is rounded, the position where the rear side locking portion 43 and the rear side locked portion 27 abut is set. Even if it is slightly deviated, this deviation can be absorbed, and the rear locking portion 43 can be brought into firm contact with the rear locked portion 27 from behind and locked.

  As described above, according to the present embodiment, when both the housings 20 and 30 reach the normal fitting state, the front locking portion 41 locks the lock protrusion 22 from the front and the rear locking. Since the portion 43 locks the rear locked portion 27 from the rear, the back and forth rattling between the housings 20 and 30 can be suppressed.

  Further, according to the present embodiment, the front side locking portion 41 and the two rear side locking portions 43 are configured to be locked at a total of three locations. Even if a rolling force is applied, back and forth rattling between the housings 20 and 30 can be reliably suppressed. Thereby, the rattling of the front-back direction between both the housings 20 and 30 can be suppressed stably.

  Further, according to the present embodiment, the rear locking portion 43 protruding from the lock arm 38 is fitted to the concave rear locked portion 27 formed in the small hood portion 21. Thus, the rear locking portion 43 can be formed on the lock arm 38 without reducing the rigidity of the lock arm 38. Thereby, for example, a protruding rear-side locked portion is formed on the upper surface of the small hood portion, and the rear-side locking portion locked with the rear-side locked portion is recessed with respect to the lock arm. The rigidity of the lock arm 38 can be prevented from decreasing as compared with the case of forming the shape.

<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 the said embodiment, although the waterproof connector 10 which has a waterproof function was illustrated, this invention is not limited to such an aspect, For example, it applies also to the connector which does not have a waterproof function. Can do.
(2) In the above embodiment, the rear locked portion 27 extends to the outside of the two protective walls 25. However, the present invention is not limited to such an embodiment. It is good also as a structure by which a pair of back side latching | locking part was formed only in the width direction both ends between 25.
(3) In the above embodiment, the rear side locked portion 27 is configured in front of the lock protrusion 22, but the present invention is not limited to such a mode. For example, the rear side locked portion May be configured on both sides in the width direction of the lock protrusion.
(4) In the above embodiment, the rear side locked portion 27 and the escape groove 29 are separately configured. However, the present invention is not limited to such a mode. For example, the rear side locked portion You may comprise a part and an escape groove | channel connected in the front-back direction.

10: Waterproof connector (connector)
20: Male housing (one housing)
22: Lock projection 25: Protection wall 27: Rear locked portion 28: Through hole 29: Relief groove 30: Female housing (the other housing)
38: Lock arm 40: Lock hole 41: Front side locking part 43: Rear side locking part

Claims (6)

A pair of housings that can be fitted together;
A locking protrusion formed to protrude from one housing;
The other housing is provided so as to be elastically deformable, and when the pair of housings are fitted, when the pair of housings are elastically deformed by being pressed by the lock protrusions, A connector provided with a lock arm that engages with the lock protrusion by overcoming the protrusion and locks the pair of housings in a fitted state,
The lock arm is formed with a front locking portion that comes into contact with the lock protrusion from the front in the fitting direction when the pair of housings are in a properly fitted state. A connector in which a rear locking portion is formed which comes into contact with a rear locked portion provided on the one housing from the rear when the locking protrusion comes into contact with the locking projection from the front in the fitting direction. The lock arm has a flat plate shape, and by forming a lock hole penetrating in the plate thickness direction with respect to the lock arm, the front portion of the lock hole is a front locking portion,
The rear side locked portion is formed to be recessed in the surface on which the lock protrusion is formed in the one housing.
The connector according to claim 1, wherein the rear locking portion is formed to protrude from a surface of the lock arm that faces the surface on which the lock protrusion is formed.   3. The escape groove through which the rear locked portion passes when the pair of housings are fitted to a surface of the one housing on which the lock protrusion is formed. connector.   The connector according to claim 2 or 3, wherein the rear locking portion has a rounded shape. The one housing is provided with a pair of protective walls that cover both sides of the lock arm in the width direction when the lock protrusion and the lock arm are locked.
The rear locked portion is formed in a groove shape extending in the width direction between the pair of protective walls, and is continuous in a width direction with a through hole penetrating a lower portion of the protective wall in the width direction. The connector according to any one of claims 2 to 4. The front side locking portion is formed at the center in the width direction of the lock arm,
The connector according to any one of claims 1 to 5, wherein the rear locking portion is formed at each of both end portions in the width direction of the lock arm.

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