JP2020202108A - housing - Google Patents

Abstract

To provide a housing including a lock mechanism that can be operated smoothly while suppressing an increase in manufacturing cost.SOLUTION: A female housing 15 includes a housing body 51 fitted with a male housing 13 and a lock mechanism 54 locking a locking protrusion 23 formed in the male housing 13, while CPA 17 ensuring a fitted state to the male housing 13 is mounted on the female housing. The CPA 17 has a fulcrum projection 115 projecting toward a support arm part 83, and, when an operation part 85 is pushed down, a support piece 88 of the support arm part 83 abuts on the fulcrum projection 115 thereby to become the fulcrum F of the swing of the support arm part 83.SELECTED DRAWING: Figure 10

Description

The present invention relates to a housing.

There is a connector having a connector position guarantee function that guarantees the mating state of housings by CPA (Connector Position Assurance) (see, for example, Patent Documents 1 to 3).

This connector includes a locking mechanism that locks the locking projections of the mating housing. The locking mechanism is a locking arm having a pair of elastic arm pieces that are entirely formed in a gate shape and supported in a cantilever shape, and a locking piece that bridges the front ends of each elastic arm piece in the width direction. It has. Further, the lock arm is provided with a gate-shaped unlocking arm that is cantileveredly supported at the front end of each elastic arm piece and has an operation portion at the rear end. In this locking mechanism, the locking pieces lock the housings by locking the locking projections of the mating housings. Further, by pressing the operation portion of the unlocking arm of the lock mechanism, the locking protrusions are released from the locking projections by the locking pieces, and the housings are unlocked from each other.

In this connector, the locking piece of the locking arm of the housing is pushed by the claw portion of the engaging arm provided on the CPA. Then, after the locking piece of the locking arm gets over the locking protrusion of the mating housing and locks, the claw portion of the engaging arm gets over the locking piece that locks the locking protrusion and locks. .. As a result, the locked state of the locking arm of the housing with the locking projection of the mating housing is maintained by the CPA.

Japanese Patent No. 3976134 Japanese Patent No. 4031374 Japanese Patent No. 5341477

By the way, in order to make the swing of the lock arm and the lock release arm smoother at the time of unlocking, it is conceivable to provide the release arm with a protrusion that abuts on the CPA and serves as a swing fulcrum. However, if the protrusion is provided on the release arm, the lock mechanism has a complicated shape, which may increase the complexity of the mold for molding the housing and increase the manufacturing cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a housing provided with a locking mechanism capable of smoothly operating while suppressing a bulky manufacturing cost.

In order to achieve the above-mentioned object, the housing according to the present invention is characterized by the following (1) to (3).
(1) Fitting that includes a housing body that is fitted with the mating housing and a locking mechanism that locks a locking projection formed on the mating housing, and guarantees a mating state with respect to the mating housing. A housing to which the guarantee member is mounted.
The lock mechanism is
A lock having a cantilever-shaped elastic arm portion extending from the outer peripheral surface of the housing body to the fitting side with the mating housing and having a locking portion engaged with and disengaged from the locking projection at the end. With the arm
A release arm that has a support arm portion that is connected to the elastic arm portion and extends to the side opposite to the fitting side with the mating side housing, and the end portion of the support arm portion is an operation portion.
With
The fitting guarantee member has a fulcrum protrusion that projects toward the support arm portion.
A housing characterized in that when the operating portion is pushed down, the support arm portion comes into contact with the fulcrum protrusion and serves as a fulcrum for swinging the support arm portion.
(2) The housing according to (1), wherein a support piece capable of contacting the fulcrum protrusion is formed on a side portion of the support arm portion.
(3) Both side portions of the locking portion of the lock arm are engaged with the displacement prevention ridges formed on the fitting guarantee member to regulate the displacement toward the locking projection. Anti-displacement protrusions are formed
The displacement prevention protrusion and the support piece are displaced in a direction orthogonal to the front-rear direction of the housing body, and are formed at positions that are spaced apart from each other in a front view. housing.

According to the housing having the configuration (1) above, when the operating portion of the release arm is pushed down, the support arm portion is brought into contact with the fulcrum protrusion provided on the fitting guarantee member, and the fulcrum of the rock arm swings. It becomes. Therefore, as compared with the case where the lock mechanism is provided with the fulcrum protrusion, the lock mechanism can be simplified while maintaining smooth operation. As a result, the structure of the mold for molding can be simplified, the mold can be easily removed from the mold after molding, and the manufacturing cost can be reduced. Further, by simplifying the mold for molding, the durability of the mold can be enhanced, and the life of the mold can be extended.
According to the housing having the configuration (2) above, the fulcrum protrusion of the fitting guarantee member comes into contact with the support piece formed on the side portion of the support arm portion, so that the support arm portion is smoothly swung and the lock arm. It is possible to smoothly unlock the locking projection by the locking portion of the housing. Further, since the support piece with which the fulcrum protrusion contacts is formed on the side portion of the support arm portion, the height of the lock mechanism can be suppressed as compared with the case where the fulcrum protrusion contacts the lower portion of the support arm portion, for example.
According to the housing having the configuration of (3) above, the displacement prevention protrusions formed on both sides of the locking portion of the lock arm engage with the displacement prevention protrusions formed on the fitting guarantee member to lock the lock. The displacement of the arm toward the locking projection in the locking direction is regulated. As a result, excessive displacement of the lock arm in the locking direction can be suppressed, and deformation or damage of the lock arm can be suppressed.
Further, since the displacement prevention protrusion and the support piece are shifted in the direction orthogonal to the front-rear direction of the housing body in the front view and are formed at positions with a gap between them in the front view, the displacement prevention protrusion and the support piece can be separated from each other. In the molding of the locking mechanism portion, the mold can be easily pulled out in the front-rear direction. Moreover, as compared with the case where the fulcrum protrusion is formed on the support piece, the size of the lock mechanism can be suppressed and the gap between the lock mechanism and the displacement prevention protrusion can be increased to improve the die removal during molding.

According to the present invention, it is possible to provide a housing provided with a locking mechanism capable of smoothly operating while suppressing a bulky manufacturing cost.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments for carrying out the invention described below (hereinafter, referred to as "embodiments") with reference to the accompanying drawings. ..

FIG. 1 is an exploded perspective view of the connector. FIG. 2 is a cross-sectional view of a connector along the mating direction of the male housing and the female housing. FIG. 3 is a perspective view of the male housing. 4A and 4B are views showing a male housing, FIG. 4A is a front view, and FIG. 4B is a side view. FIG. 5 is a perspective view of the female housing according to the present embodiment. 6A and 6B are views showing a female housing according to the present embodiment, FIG. 6A is a front view, and FIG. 6B is a side view. FIG. 7 is a perspective view of the CPA mounted on the female housing. 8A and 8B are views showing a CPA mounted on the female housing, FIG. 8A is a front view, and FIG. 8B is a sectional view taken along the line AA in FIG. 8A. 9A and 9B are views showing a connector in which a male housing and a female housing are fitted, FIG. 9A is a front view seen from the male housing side, and FIG. 9B is FIG. 9A. It is a BB sectional view. FIG. 10 is a cross-sectional view of a fulcrum and its periphery showing an unlocking operation by the locking mechanism. FIG. 11 is a front view of a part of the female housing. FIG. 12 is a cross-sectional view of a fulcrum and its periphery showing an unlocking operation by the locking mechanism of the female housing according to the reference example. FIG. 13 is a front view of a part of the female housing according to the reference example.

Hereinafter, examples of embodiments according to the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of the connector. FIG. 2 is a cross-sectional view of a connector along the mating direction of the male housing and the female housing.

(connector)
As shown in FIGS. 1 and 2, the female housing (housing) 15 according to the present embodiment is fitted to the male housing (counterpart housing) 13, and constitutes the connector 11 together with the male housing 13. The connector 11 includes a tubular CPA (fitting guarantee member) 17 that is slid and mounted from the rear side of the female housing 15. These male housing 13, female housing 15 and CPA 17 are each molded from synthetic resin.

(Male housing)
FIG. 3 is a perspective view of the male housing. 4A and 4B are views showing a male housing, FIG. 4A is a front view, and FIG. 4B is a side view.

As shown in FIGS. 3 and 4 (a) and 4 (b), the male housing 13 has a hood portion 21 on the tip end side which is the fitting side with the female housing 15. Locking protrusions 23 are formed above and below the hood portion 21.

The male housing 13 has two terminal accommodating chambers 30 on the rear side opposite to the fitting side with the female housing 15. As shown in FIG. 1, the terminal accommodating chamber 30 accommodates a male terminal 33 connected to an end portion of the electric wire 31, and the electric wire 31 is pulled out from the rear end of the male housing 13. A rubber stopper 34 attached to the electric wire 31 is fitted into the terminal accommodating chamber 30 from the rear end side of the male housing 13. As a result, the terminal accommodating chamber 30 of the male housing 13 accommodating the male terminal 33 is stopped.

The male terminal 33 is formed of, for example, a conductive metal material such as copper or a copper alloy, and the electric wire 31 is crimped and connected. The male terminal 33 has a tab 35 formed in a pin shape, and the tab 35 is arranged in the hood portion 21.

The front holder 41 and the short terminal 43 are assembled to the male housing 13 from the front end side. The front holder 41 is made of synthetic resin, and by assembling the front holder 41 to the male housing 13, the male terminal 33 inserted and accommodated in the terminal accommodating chamber 30 is accommodated in the terminal accommodating chamber 30. It is held in the same state. The short terminal 43 is formed of, for example, a conductive metal material such as copper or a copper alloy. By assembling the short terminal 43 to the male housing 13, the short terminal 43 comes into contact with the tab 35 of the male terminal 33 in a non-fitting state in which the female housing 15 is not fitted to the male housing 13. As a result, the male terminals 33 are electrically connected to each other at the short terminals 43, and for example, an interlock circuit is formed.

(Female housing)
FIG. 5 is a perspective view of the female housing according to the present embodiment. 6A and 6B are views showing a female housing according to the present embodiment, FIG. 6A is a front view, and FIG. 6B is a side view.

As shown in FIGS. 5 and 6 (a) and 6 (b), the female housing 15 according to the present embodiment has a housing main body 51, a fitting protrusion 53, and a lock mechanism 54. The fitting protrusion 53 projects from the housing body 51 toward the front side in the fitting direction with the male housing 13, and is fitted to the hood portion 21 of the male housing 13. The fitting protrusion 53 is a seal mounting portion 61 and a terminal holding portion 63 in this order from the housing body 51 side. The terminal holding portion 63 projects forward from the seal mounting portion 61. The female housing 15 has a fitting edge portion 65 having an outer shape in which the edge portion on the fitting protrusion 53 side of the housing body 51 is larger than the seal mounting portion 61.

The lock mechanism 54 is provided on the upper portion of the housing body 51 in the female housing 15. The lock mechanism 54 has a lock arm 55 and a release arm 81. The lock arm 55 has a pair of elastic arm portions 71. The elastic arm portion 71 has a strut portion 73 formed on the upper surface of the housing main body 51, a bent portion 75 bent forward from the strut portion 73, and an extending portion 77 extending forward from the bent portion 75. There is. The tips of the extending portions 77 of the elastic arm portion 71 are connected to each other, and this connecting portion is referred to as a locking portion 79. The lock arm 55 swings when the elastic arm portion 71 is elastically deformed.

The release arm 81 has a pair of support arm portions 83 that are connected to the tip of the elastic arm portion 71 and extend rearward, and an operation portion 85 that connects the rear ends of these support arm portions 83. The support arm portion 83 extends to the rear side of the female housing 15 from the strut portion 73 of the elastic arm portion 71. As a result, the operating portion 85 is arranged on the rear side of the female housing 15 with respect to the strut portion 73 of the elastic arm portion 71.

In the lock mechanism 54, when the male housing 13 and the female housing 15 are fitted, the locking portion 79 of the lock arm 55 locks the upper locking projection 23 in the hood portion 21 of the male housing 13. As a result, the male housing 13 and the female housing 15 are locked so as to be fitted to each other.

The lock mechanism 54 has a displacement prevention protrusion 87 and a support piece 88. The displacement prevention protrusions 87 are projected from both sides at the tip of the lock arm 55 on which the locking portion 79 is formed. The support piece 88 is projected from both sides of the support arm portion 83 constituting the release arm 81, and is formed in a plate shape along the extending direction of the support arm portion 83. Further, the displacement prevention projection 87 and the support piece 88 are displaced in the vertical direction, which is a direction orthogonal to the front-rear direction of the housing body 51, and are formed at positions so as to be spaced apart from each other in the front view.

Two terminal accommodating chambers 91 are formed in the female housing 15. As shown in FIG. 1, the terminal accommodating chamber 91 accommodates the female terminal 95 connected to the end of the electric wire 93, and the electric wire 93 is pulled out from the rear end of the female housing 15. A rubber stopper 96 attached to the electric wire 93 is fitted into the terminal accommodating chamber 91 from the rear end side of the female housing 15. As a result, the terminal accommodating chamber 91 of the female housing 15 accommodating the female terminal 95 is stopped.

Further, the seal member 98 and the retainer 99 are mounted on the female housing 15 from the front side. The seal member 98 is made of an elastic material such as rubber, and is formed in an annular shape. The seal member 98 is mounted on the seal mounting portion 61 of the fitting protrusion 53. The retainer 99 is made of synthetic resin and is attached to the terminal holding portion 63 of the fitting protrusion 53. By mounting the retainer 99 on the terminal holding portion 63, the female terminal 95 inserted and accommodated in the terminal accommodating chamber 91 is held in a state of being accommodated in the terminal accommodating chamber 91.

(CPA)
FIG. 7 is a perspective view of the CPA mounted on the female housing. 8A and 8B are views showing a CPA mounted on the female housing, FIG. 8A is a front view, and FIG. 8B is a sectional view taken along the line AA in FIG. 8A.

As shown in FIGS. 7 and 8 (a) and 8 (b), the CPA 17 has a main body portion 101 formed in a square tubular shape, and is covered with the female housing 15 from the rear in the fitting direction. It is mounted so that it can be slidable. The CPA 17 has engaging arms 103 above and below the main body 101. These engaging arms 103 are supported by the main body 101 in a cantilever shape, and an engaging claw 105 projecting inward is formed at the tip thereof.

The CPA 17 has a displacement prevention ridge 111 and a support portion 113. These displacement prevention ridges 111 and support portions 113 are formed on the inner surfaces of both side plate portions 110 constituting the main body portion 101. The displacement prevention ridge 111 is formed along the mounting direction with respect to the female housing 15. The support portion 113 is provided on the lower side of the engaging arm 103, and protrudes upward from the displacement prevention ridge 111. A fulcrum protrusion 115 protruding from the upper surface of the support portion 113 is formed on the support portion 113.

(Mating procedure)
Next, the fitting of the male housing 13 and the female housing 15 will be described.
First, the CPA 17 is fitted from the rear end side of the female housing 15. Then, the displacement prevention protrusion 87 of the female housing 15 engages with the displacement prevention protrusion 111 of the CPA 17. As a result, the lock arm 55 of the lock mechanism 54 is suppressed from being displaced toward the housing body 51 on the tip end side thereof. When the CPA 17 is further pushed in to attach the CPA 17 to the female housing 15, the engaging claw 105 of the engaging arm 103 on the upper side of the CPA 17 comes into contact with the rear portion of the locking portion 79 of the lock arm 55.

When the female housing 15 to which the CPA 17 is mounted is fitted to the male housing 13, the locking portion 79 is pressed forward in the fitting direction by the engaging arm 103 on the upper side of the CPA 17. Then, when the locking portion 79 of the lock arm 55 gets over the locking projection 23 on the upper side of the hood portion 21 of the male housing 13 and locks, the male housing 13 and the female housing 15 are locked in a fitted state. ..

Further, the locking portion of the lock arm 55 in which the engaging claw 105 of the engaging arm 103 on the upper side of the CPA 17 pushed forward in the fitting direction locks the locking projection 23 on the upper side of the hood portion 21. It engages with 79, and the engaging claw 105 of the lower engaging arm 103 locks the lower locking projection 23 of the hood portion 21. As a result, the CPA 17 is locked to the male housing 13 by the upper and lower engaging arms 103, and the locked state of the locking projection 23 by the locking portion 79 of the lock arm 55 is maintained by the upper engaging arm 103 of the CPA 17. The mating guarantee state is ensured.

Then, when the male housing 13 and the female housing 15 are fitted, the fitting protrusion 53 of the female housing 15 on which the retainer 99 is mounted is inserted into the hood portion 21 of the male housing 13. As a result, the short terminal 43 is pushed down by the retainer 99 to separate from the tab 35 of the male terminal 33, the short-circuit state of the male terminal 33 is released, and the tab 35 of the male terminal 33 is inserted into the female terminal 95. They are electrically connected to each other.

(Withdrawal procedure)
Next, a case where the male housing 13 and the female housing 15 are disengaged and detached will be described.
9A and 9B are views showing a connector in which a male housing and a female housing are fitted, FIG. 9A is a front view seen from the male housing side, and FIG. 9B is FIG. 9A. It is a BB sectional view. FIG. 10 is a cross-sectional view of a fulcrum and its periphery showing an unlocking operation by the locking mechanism. FIG. 11 is a front view of a part of the female housing.

As shown in FIGS. 9A and 9B, the CPA 17 is disengaged by the upper and lower engaging arms 103, and the CPA 17 is moved to the rear side of the female housing 15. Then, as shown in FIG. 10, the fulcrum projection 115 of the support portion 113 of the CPA 17 is arranged on the lower side of the support piece 88 formed on the support arm portion 83 of the release arm 81 of the female housing 15.

In this state, the operation portion 85 of the release arm 81 constituting the lock mechanism 54 of the female housing 15 is pushed down. Then, the support piece 88 formed on the support arm portion 83 of the release arm 81 comes into contact with the fulcrum protrusion 115 formed on the support portion 113 of the CPA 17. Therefore, the lock arm 55 swings with the contact point between the support piece 88 and the fulcrum projection 115 of the support portion 113 as the fulcrum F. As a result, the locking portion 79 of the lock arm 55 is displaced in the direction away from the housing body 51, and is disengaged from the locking projection 32 on the upper side of the male housing 13.

In this state, by pulling out the female housing 15 from the male housing 13 together with the CPA 17, the male housing 13 and the female housing 15 are separated from each other, and the electrical connection state between the male terminal 33 and the female terminal 95 is released.

As described above, according to the female housing 15 according to the present embodiment, when the operation portion 85 of the release arm 81 is pushed down, the support piece 88 of the support arm portion 83 is attached to the fulcrum protrusion 115 provided on the CPA 17. Is in contact with each other and becomes a fulcrum F for swinging the lock arm 55. As a result, the support arm portion 83 is smoothly swung with the contact point of the fulcrum projection 115 with the support piece 88 as the fulcrum F, and the locking projection 23 is smoothly released by the locking portion 79 of the lock arm 55. Will be done.

Therefore, as compared with the case where the lock mechanism 54 is provided with the fulcrum protrusion, the lock mechanism 54 can be simplified while maintaining smooth operation. As a result, the structure of the mold for molding can be simplified, the mold can be easily removed from the mold after molding, and the manufacturing cost can be reduced. Further, by simplifying the mold for molding, the durability of the mold can be enhanced, and the life of the mold can be extended.

Further, since the support piece 88 with which the fulcrum protrusion 115 abuts is formed on the side portion of the support arm portion 83, the height of the lock mechanism 54 is higher than that when the fulcrum protrusion 115 is brought into contact with the lower portion of the support arm portion 83, for example. Can be suppressed.

Further, in the female housing 15 according to the present embodiment, the fulcrum projection 115 constituting the swing fulcrum F of the support arm portion 83 of the release arm 81 is formed on the CPA 17 to form the fulcrum F at the time of unlocking. The support piece 88 can be formed in a plate shape along the extending direction of the support arm portion 83. Therefore, as shown in FIG. 11, the female housing 15 secures a large gap C1 between the displacement prevention protrusion 87 and the support piece 88 while suppressing the bulkiness of the height of the lock mechanism 54 in the front view. Can be done.

Here, a reference example will be described.
FIG. 12 is a cross-sectional view of a fulcrum and its periphery showing an unlocking operation by the locking mechanism of the female housing according to the reference example. FIG. 13 is a front view of a part of the female housing according to the reference example.

As shown in FIG. 12, in the reference example, the CPA 17 is provided with the support portion 113 having no fulcrum protrusion 115, and the support piece 88 provided on the support arm portion 83 of the release arm 81 constituting the lock mechanism 54 of the female housing 15. A fulcrum protrusion 89 projecting downward is formed therein.

In this reference example, when the operation portion 85 of the release arm 81 is pushed down, the fulcrum projection 89 of the support piece 88 formed on the support arm portion 83 of the release arm 81 comes into contact with the support portion 113 of the CPA 17. Therefore, the lock arm 55 swings with the contact point between the fulcrum protrusion 89 of the support piece 88 and the support portion 113 as the fulcrum F. As a result, the locking portion 79 of the lock arm 55 is displaced in the direction away from the housing body 51, and is disengaged from the locking projection 32 on the upper side of the male housing 13.

By the way, in this reference example, the fulcrum protrusion 89 is formed on the support piece 88 that forms the fulcrum F at the time of unlocking. Therefore, as shown in FIG. 13, the female housing 15 can secure only a small gap C2 between the displacement prevention protrusion 87 and the fulcrum protrusion 89 of the support piece 88 in the front view.

Therefore, in this reference example, the space for pulling out the front and back of the mold becomes small, which makes it difficult to remove the mold, and moreover, the portion where the gap C2 portion in the mold is formed becomes fragile and the durability is lowered.

On the other hand, according to the present embodiment, a large gap C1 is formed between the displacement prevention protrusion 87 and the support piece 88 in the front view (see FIG. 11). Therefore, since the space for pulling out the front and back of the mold is large, it is possible to satisfactorily remove the mold, and it is possible to improve the durability of the portion where the gap C1 portion in the mold is formed.

The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Here, the features of the above-described housing embodiments according to the present invention are briefly summarized and listed below in [1] to [3], respectively.
[1] A locking mechanism (54) that locks a housing body (51) fitted with a mating housing (male housing 13) and a locking projection (23) formed on the mating housing (male housing 13). ), And a housing (female housing 15) to which a fitting guarantee member (CPA17) that guarantees a fitting state with respect to the mating housing (male housing 13) is mounted.
The lock mechanism (54)
A locking portion (79) that extends from the outer peripheral surface of the housing body (51) to the mating side with the mating housing (male housing 13) and is engaged with and disengaged from the locking projection (23) at the end. A lock arm (55) having a cantilever-shaped elastic arm portion (71) and
The support arm portion (83) is connected to the elastic arm portion (71) and extends to the side opposite to the fitting side with the mating side housing (male housing 13), and the support arm portion (83) The release arm (81) whose end is the operation unit (85),
With
The fitting guarantee member (CPA17) has a fulcrum protrusion (115) that projects toward the support arm portion (83).
When the operating portion (85) is pushed down, the support arm portion (83) comes into contact with the fulcrum protrusion (115) and becomes a fulcrum (F) for swinging the support arm portion (83). Characterized housing.
[2] The housing according to [1], wherein a support piece (88) capable of contacting the fulcrum protrusion (115) is formed on a side portion of the support arm portion (83).
[3] The locking portions (79) of the lock arm (55) are engaged with the displacement prevention ridges (111) formed on the fitting guarantee member (CPA17) on both side portions of the locking portion (79). A displacement prevention protrusion (87) is formed to regulate the displacement toward the protrusion (23) in the locking direction.
The displacement prevention protrusion (87) and the support piece (88) are displaced in a direction orthogonal to the front-rear direction of the housing body (51), and are formed at positions where a gap (C1) is provided between them in a front view. The housing according to [2], wherein the housing is provided.

13: Male housing (counterpart housing)
15: Female housing (housing)
17: CPA (fitting guarantee member)
23: Locking protrusion 51: Housing body 54: Locking mechanism 55: Locking arm 71: Elastic arm part 79: Locking part 81: Release arm 83: Support arm part 85: Operating part 87: Displacement prevention protrusion 88: Support piece 111 : Displacement prevention ridge 115: Supporting point protrusion C1: Gap F: Supporting point

Claims (3)

A fitting guarantee member that includes a housing body that is fitted to the mating housing and a locking mechanism that locks a locking projection formed on the mating housing and guarantees a mating state with respect to the mating housing. The housing to be mounted
The lock mechanism is
A lock having a cantilever-shaped elastic arm portion extending from the outer peripheral surface of the housing body to the fitting side with the mating housing and having a locking portion engaged with and disengaged from the locking projection at the end. With the arm
A release arm that has a support arm portion that is connected to the elastic arm portion and extends to the side opposite to the fitting side with the mating side housing, and the end portion of the support arm portion is an operation portion.
With
The fitting guarantee member has a fulcrum protrusion that projects toward the support arm portion.
A housing characterized in that when the operating portion is pushed down, the support arm portion comes into contact with the fulcrum protrusion and serves as a fulcrum for swinging the support arm portion. The housing according to claim 1, wherein a support piece that can come into contact with the fulcrum protrusion is formed on the side portion of the support arm portion. Displacement prevention protrusions on both sides of the locking portion of the lock arm engage with the displacement prevention protrusions formed on the fitting guarantee member to regulate the displacement toward the locking protrusion in the locking direction. Is formed,
The second aspect of the present invention, wherein the displacement prevention protrusion and the support piece are displaced in a direction orthogonal to the front-rear direction of the housing body and are formed at positions that are spaced apart from each other in a front view. housing.

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