JPH10162888A - Connector housing with double lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector housing with a double locking structure by which troubles for assembling can be reduced and production cost can be reduced by shortening a forming process. SOLUTION: Plural housing units 20, 21, a flexible band 22 jointing the housing units 20, 21 so that they can be laminated together and a laminating engagement claw 23 to connect and fix the housing units 20, 21 to each other are integrally constituted. The housing units 20, 21 each constituently expose a back of an elastic locking piece 27 for locking a connecting terminal to the outside surface of the unit 20a, 21a, so that a double locking condition can be obtained by making the elastic locking piece 27 abut back to back on each other when laminating the housing units together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector housing having a double locking structure in a connector mainly used for connecting a wire harness for a motor vehicle. The present invention relates to an improvement for shortening a process and reducing a production cost.

[0002]

2. Description of the Related Art Generally, in a resin connector used for connection of electric wiring, in order to prevent a connection terminal inserted into a resin connector housing from falling off,
An elastic locking piece (lance) that engages with the inserted connection terminal is integrally formed in the connector housing. However, since connectors used for electric wiring of automobiles and the like are exposed to vibrations or the like during traveling, the engagement state of the elastic locking pieces is locked so that the engagement of the elastic locking pieces does not come off due to the vibration. 2. Description of the Related Art A connector housing having a double locking structure in which locking means for locking a connection terminal separately from an elastic locking piece is formed.

FIGS. 16 and 17 show an example of a conventional connector housing having a double locking structure. The connector housing 1 of the double locking structure shown here is disclosed in Japanese Utility Model Laid-Open Publication No. Hei 5-23440, and has elasticity for locking the connection terminals 2 in the terminal accommodating chamber 3 into which the connection terminals 2 are inserted. The housing includes a resin housing main body 5 having a configuration in which the locking pieces 4 are formed, and a resin double locking member 7 mounted on the housing main body 5.

[0004] The housing main body 5 has terminal housing chambers 3 formed in two upper and lower stages. Further, the double locking member 7 is formed separately from the housing body 5,
The partition plates 8 are arranged in a comb shape in accordance with the arrangement of the terminal receiving chambers 3 of the housing body 5, and at the upper end and the lower end of each partition plate 8, at the rear end of the elastic locking piece 4 of each terminal receiving chamber 3. The configuration is such that regulating walls 9, 10 that abut against the elastic displacement of the elastic locking pieces 4 are formed.

The double locking member 7 is formed by inserting each partition plate 8 into the housing main body 5 from the opening 5a in the upper wall of the housing main body 5 so that the upper wall 7a and the regulating wall 10 on the upper end side are connected. Is fixed to the housing main body 5 in a state where the engaging step 7b formed at the boundary between the two is engaged with the corner on the housing main body 5 side. The first corner portion 5b for temporary fixing includes a corner portion on the housing body 5 side with which the engagement step portion 7b engages,
Two locations are set, including a second corner portion 5c for permanent fixing.

In the provisionally fixed state in which the engaging step 7b is engaged with the first corner 5b, as shown in FIG. Are located above the rear ends of the elastic locking pieces 4 of each stage in the housing body 5 and do not hinder the elastic displacement of the elastic locking pieces 4 when the connection terminal 2 is inserted. Accordingly, the elastic locking piece 4 is elastically displaced with the insertion of the connection terminal 2, and if the connection terminal 2 is properly inserted to a predetermined position in the terminal accommodating chamber 3, the elastic locking piece 4 is elastically restored by the elastic restoring force. Returning to the original position, the elastic locking piece 4
An engagement state in which the upper locking projection is fitted in the engagement hole of the connection terminal 2 is obtained.

[0007] When the connection terminal 2 is engaged by the elastic locking piece 4 in the terminal accommodating chamber 3, the double locking member 7 is moved to the permanent fixing position. First, as shown in FIG. 17B, the moving operation is to move the double locking member 7 at the temporarily fixed position horizontally as shown by the arrow (A), and to engage the engaging step 7b with the first step. The engagement with the corner 5b is released. Then, FIG.
As shown by an arrow (B) in (c), the double locking member 7 is vertically pushed into the housing main body 5 and the engagement step 7 is pressed.
b may be engaged with the second corner 5c.

In the fully fixed state in which the engaging step 7b is engaged with the second corner 5c, the regulating walls 9, 10 of the double engaging member 7 are located at the rear ends of the elastic engaging pieces 4. In this state, the elastic engagement of the double locking member 7 is restricted, and the engagement state of the connection terminal 2 by the elastic locking piece 4 is locked. In addition,
A diagram in which the double locking member 7 engages with a locking groove formed on the housing body 5 side when the double locking member 7 is moved to the final fixing position, and fixes the double locking member 7 at the final fixing position. A fixing means not shown is formed.

[0009]

However, in the connector housing 1 described above, since the housing main body 5 and the double locking member 7 are separate bodies, the connection terminal 2 is connected to the housing main body 5.
Before inserting the double locking member 7 into the temporary fixing position of the housing body 5 before inserting it into the terminal accommodating chamber 3, it is necessary to perform an assembling operation. Accordingly, the assembling work is troublesome, and the number of molding steps for individually molding the housing main body 5 and the double locking member 7 is increased, resulting in an increase in production cost.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to reduce the labor required for the assembling work and to shorten the molding process to reduce the production cost. The present invention provides a connector housing.

[0011]

An object of the present invention is to provide a connector housing having a double locking structure according to claim 1, wherein a plurality of housing units and two housing units are connected to each other in a stackable manner. The band and one of the housing units laminated to each other are protruded, and the hook portion at the tip is engaged with the engagement groove on the other housing unit, so that the pair of laminated housing units are brought into a laminated state. The housing unit has a structure in which a laminated engaging piece for connecting and fixing is integrally formed, and the housing unit has a terminal accommodating chamber having an elastic locking piece for locking the connection terminal. Exposed to the outer surface to be stacked on the unit, forming a configuration aligned and formed in one or two stages, and when the housing units are stacked on each other, To restrain each other resilient flexible elastic latching pieces each other are exposed on the surface in contact with the back-to-back,
This can be solved by a connector housing having a double locking structure, wherein a double locking state in which the locking state of the connection terminal by each elastic locking piece is locked is obtained.

Further, the object is a connector housing having a double locking structure according to claim 2, wherein a plurality of housing units, a flexible band connecting the two housing units to each other in a stackable manner, A stack that protrudes from one of the stacked housing units and engages a hook portion at the tip with an engagement groove on the other housing unit to connect and fix the stacked pair of housing units to each other in a stacked state. An engaging piece and a double locking spacer formed on a flexible band so as to be sandwiched between stacked housing units are integrally formed, and the housing unit locks the connection terminal. The terminal receiving chambers having elastic locking pieces are formed in one or two stages and communicate with the terminal receiving chambers on the outer wall surface on which other housing units are stacked. A double locking opening is formed through the double locking opening, and the double locking spacer projects from the double locking opening to each terminal accommodating chamber when the housing units are stacked. As a configuration in which a double locking projection that engages with a predetermined engagement portion of the connection terminal in the terminal accommodating chamber is formed, the engagement by the double locking projection when the housing units are stacked with each other; This problem can be solved by a connector housing having a double locking structure, wherein the connection terminal is double locked by engagement with an elastic locking piece.

The connector housing according to claim 3, further comprising: a plurality of housing units; a flexible band connecting the two housing units to each other in a stackable manner; A plurality of housing units projecting from the housing unit and engaging a hook portion at an end thereof with an engagement groove on the other housing unit, thereby connecting and fixing a pair of stacked housing units to each other in a stacked state. And a double locking spacer formed on the flexible band so as to be able to advance and retreat in a gap between the stacked housing units, and the housing unit has an elasticity for locking the connection terminal. A terminal accommodating chamber having a locking piece exposes the back surface of the elastic locking piece to an outer surface laminated on another housing unit, and is arranged in one or two stages. When the housing units are laminated with each other, the double locking spacer can be inserted between the back surfaces of the elastic locking pieces exposed to the outer surface of each housing unit and facing each other. A gap is secured, and in a state in which the housing units are stacked, by pushing the double locking spacer into the gap between the back surfaces of the opposing elastic locking pieces, the elastic displacement of each elastic locking piece is reduced. The present invention can be solved by a connector housing having a double locking structure, wherein a double locking state is obtained in which the locked state of the connection terminal by each elastic locking piece is locked.

In the connector housing having the double locking structure having the above-described structure, in any one of the first to third aspects, a separate double locking member is not used, and the connector housing is formed as one part. This eliminates the need for complicated work such as assembling a separate double locking member. Therefore, the labor required for the assembling operation can be reduced, and the molding process can be shortened to reduce the production cost.

In the connector housing having the double locking structure according to the first aspect, when the housing units connected to each other in a stackable manner by the flexible band are stacked, they are exposed on the outer surface of each housing unit. The elastic locking pieces abut against each other to restrain the elastic displacement of each other, and a double locking state in which the locking state of the connection terminal by each elastic locking piece is locked is obtained. That is, instead of providing the double locking member specially, the elastic locking piece on the housing unit of the mating partner is utilized as the double locking member, and the double locking member is specially formed. As much as you don't have to
The structure can be simplified, reliability can be improved, and reduction in production cost can be promoted.

In the connector housing having the double locking structure according to the second and third aspects, the double locking spacer functioning as the double locking member is formed. The spacer is integrally formed with a flexible band that connects the housing units to each other in a stackable manner, and is automatically positioned at a predetermined temporary fixing position or a full fixing position by stacking the housing units. Is done.
Therefore, no complicated operation is required for positioning the double locking spacer with respect to the housing unit.
Therefore, the double locking spacer, which is a dedicated member functioning as the double locking member, is formed. However, the point that it can be integrally molded as one part, the labor required for assembly can be reduced, and the production cost is reduced. can do.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a connector housing having a double locking structure according to the present invention will be described in detail with reference to FIGS. 1 is an exploded perspective view of a first embodiment of a connector housing having a double locking structure according to the present invention, FIG. 2 is a perspective view of an assembled state in FIG. 1, and FIG. 3 is a longitudinal section in an assembled state of FIG. FIGS. 4A and 4B are longitudinal sectional views showing the operation when the connection terminal is not properly mounted.

As shown in FIG. 1, a connector housing 18 having a double locking structure according to the present embodiment is mainly used for a connector used for connecting a wire harness for an automobile, and has two housing units 20, 21. And a flexible band 22 connecting these two housing units 20 and 21 in a stackable manner, and a stacking engagement piece 23 protruding from one of the pair of housing units 20 and 21 stacked on each other. And is integrally formed by injection molding of an insulating resin.

The flexible band 22 connects the side surfaces of the two housing units 20 and 21 to each other, and is bent in two so that the two housing units 20 and 21 are stacked as shown in FIG. Hinge type.

The laminated engaging piece 23 is provided with a hook 2 at the tip.
3a is engaged with the engaging groove 21b on the other housing unit 21.
By engaging with the pair, the pair of stacked housing units 20 and 21 are connected and fixed in a stacked state.
One housing unit 20 is formed before and after each side surface, four in total.

Each of the housing units 20 and 21 has a terminal accommodating chamber 29 having an elastic locking piece 27 for locking the connection terminal 26 crimped to the electric wire 25.
The back surface of 7 is exposed to the outer surfaces 20a and 21a laminated on another housing unit, and is formed in a one-step arrangement.

Then, these housing units 2
0 and 21 are laminated, each housing unit 2
The elastic locking pieces 27 exposed on the outer surfaces 20a, 21a of the reference numerals 0, 21 abut against each other to restrain the elastic displacement of each other, and the locking state of the connection terminal 26 by each elastic locking piece 27 is changed. A locked double locked state is obtained.

The connector housing 18 of the first embodiment described above does not use a separate double locking member as in the prior art, but can be formed as one part, and a separate double locking member is used. No cumbersome work such as assembling the stopping member is required. Therefore, the labor required for the assembling operation can be reduced, and the molding process can be shortened to reduce the production cost.

In the connector housing 18,
The housing units 20 and 21 connected in a stackable manner by the flexible band 22 can be easily stacked by folding each other. Therefore, the elastic locking pieces 27 exposed on the outer surfaces 20a and 21a of the housing units 20 and 21 abut against each other to restrain the elastic displacement of each other, and the connection terminals 26 by the elastic locking pieces 27 are formed.
The locked state is locked to obtain a double locked state. That is, instead of providing a special double locking member, the elastic locking pieces 27 on the housing units 20 and 21 to be laminated are used.
Are used as double locking members, and the structure can be simplified as much as there is no need to form a special double locking member. It is possible to promote reduction in production cost.

Further, as shown in FIG.
When the connection terminal 26 is not fully inserted into the housing unit 9, the elastic locking pieces 27 project toward the other housing unit side, and the elastic locking pieces 27, 27 cannot contact each other. Cannot be properly laminated, and the occurrence of the incomplete insertion can be reliably detected.

Next, a second embodiment of a connector housing having a double locking structure according to the present invention will be described in detail with reference to FIGS. FIG. 5 is a perspective view of a main part of the connector housing of the double locking structure according to the second embodiment of the present invention in an expanded state, FIG. 6 is a front view of the expanded state in FIG. 5, and FIG. FIG. 8 is a longitudinal sectional view showing the operation when the connection terminal in FIG. 5 is improperly mounted, and FIG. 9 is a longitudinal sectional view showing the operation when the connection terminal in FIG. 5 is properly mounted.

As shown in FIG. 5, the connector housing 31 of the present embodiment is mainly used for a connector used for connecting a wire harness for an automobile, similarly to the first embodiment. Specifically, the connector housing 31 includes two housing units 32, 3
3, a flexible band 35, 36 connecting these two housing units 32, 33 to each other in a stackable manner, and a stacked engagement piece protruding from one of a pair of housing units 32, 33 stacked on each other. 23 and a double locking spacer 37 formed integrally with the flexible band 35 so as to be sandwiched between the laminated housing units 32 and 33, and the insulating resin is injected. It is integrally molded by molding.

As shown in FIGS. 6 and 7, the flexible band 35 is formed in a substantially rectangular shape and both ends are connected to the side surfaces of the housing units 32 and 33 to be stacked. It functions as a compression spring for urging the housing units 32 and 33 in the separating direction, and is formed on both sides near the front end of the housing unit. The flexible band 36 is formed into a substantially circular arc shape, and has both ends connected to the side surfaces of the stacked housing units 32 and 33, and urges the stacked housing units 32 and 33 in the separating direction. It functions as a compression spring and is formed on both sides near the rear end of the housing unit.

The laminated engaging piece 23 is the same as that of the first embodiment, and is provided so as to protrude from one housing unit 32 so that the hook portion 23a at the tip is engaged with the engaging groove 33b on the other housing unit 33. By engaging, a pair of stacked housing units 32 and 33 are connected and fixed to each other in a stacked state, and a total of four housing units are formed before and after each side surface of one housing unit 32.

Each of the housing units 32 and 33 has a terminal accommodating chamber 29 having an elastic locking piece 27 for locking the connection terminal 26, and an outer surface on which the back surface of the elastic locking piece 27 is laminated on another housing unit. Exposure to 32a, 33a
It is formed in one row. In addition, since the back surface of each elastic locking piece 27 secures a gap for accommodating the above-described double locking spacer 37, the outer surfaces 32a, 33
It is set at a position slightly lower than a. Further, in the housing units 32 and 33 of the present embodiment,
On the outer wall surface on which the other housing units 32 and 33 are laminated, a double locking opening 32b communicating with the terminal accommodating chamber 29,
33b is formed through.

When the housing units 32 and 33 are stacked on each other, the double locking spacer 37 protrudes from the double locking openings 32b and 33b into the respective terminal accommodating chambers 29. Locking projection 39 which engages with a predetermined engaging portion (stabilizer) 26a of the connection terminal 26 in the inside
Are formed.

In the connector housing 31 described above, the connection terminal 26 is formed by the engagement of the double locking projection 39 and the engagement of the elastic locking piece 27 when the housing units 32 and 33 are stacked. Make heavy locking.

In the connector housing 31, a double locking spacer 37 functioning as a double locking member is formed. The double locking spacer 37 is formed by stacking the housing units 32 and 33. It is integrally formed with a flexible band 35 that is connected to it. By making the housing units 32 and 33 mutually stacked, the housing units 32 and 33 are automatically positioned at a predetermined temporary fixing position or a full fixing position,
No troublesome operation is required for positioning the double locking spacer 37 with respect to the housing units 32 and 33. Therefore, the double locking spacer 37, which is a dedicated member that functions as a double locking member, is formed. However, the spacer 37 can be integrally molded as one part, and the labor required for assembly can be reduced. Therefore, the same effects as those of the above-described connector housing 18 can be obtained, and the production cost can be reduced.

In the case of the connector housing 31, as shown in FIG.
If the insertion of the housing unit 6 is incomplete, the double locking projection 39 rides on the engaging portion 26a on the connection terminal 26, and the housing units 32 and 33 cannot be properly stacked. Can be reliably detected.

Next, a third embodiment of a connector housing having a double locking structure according to the present invention will be described in detail with reference to FIGS. 10 is a perspective view of a main part of the connector housing having the double locking structure according to the third embodiment of the present invention in an expanded state, FIG. 11 is a longitudinal sectional view in an expanded state of FIG. 10, and FIG. 12 is a housing unit in FIG. FIG. 13 is a longitudinal sectional view showing the behavior of the double locking spacer when the layers are stacked, FIG. 13 is a view as viewed from the direction indicated by the arrow A in FIG. 11, and FIG.
FIG. 15 is a longitudinal sectional view showing a fully fixed state of the double locking spacer at 0, and FIG. 15 is a longitudinal sectional view showing an operation when a mounting failure of the connection terminal occurs.

As shown in FIG. 10, the connector housing 41 of this embodiment is used mainly for a connector used for connecting a wire harness for an automobile, similarly to the first and second embodiments. Things. Specifically, the connector housing 41 includes two housing units 42 and 43 and two housing units 4
Flexible bands 35, 3 connected so that layers 2 and 43 can be stacked
6 and a pair of housing units 4 stacked on each other
A pair of housing units 42 and 43 projecting from one of the housing units 2 and 43 and connecting and fixing the housing units 42 and 43 to each other in a stacked state;
The structure is such that a double locking spacer 37 integrally formed with the flexible band 35 is integrated with the flexible band 35 so as to be able to advance and retreat in the gap between the grooves 43, and is integrally formed by injection molding of an insulating resin.

The flexible bands 35 and 36 are connected to the second
The description is omitted because it is the same as that of the embodiment. The laminated engaging piece 23 is the same as that of the second embodiment, and is provided so as to protrude from one housing unit 42 to engage the hook portion 23a at the tip with the engaging groove 43b on the other housing unit 43. By joining, a pair of stacked housing units 42 and 43 are connected and fixed to each other in a stacked state, and a total of four housing units are formed before and after each side surface of one housing unit 42.

In the housing units 42 and 43, a terminal accommodating chamber 29 having an elastic locking piece 27 for locking the connection terminal 26 is laminated on the other housing units 42 and 43 with the back surface of the elastic locking piece 27. The outer surfaces 42a and 43a are exposed so as to form a one-stage alignment. As shown in FIG. 12, when the housing units 42 and 43 are stacked together, the double engagement between the back surfaces of the elastic locking pieces 27 that are exposed on the outer surfaces 42 a and 43 a of the housing units 42 and 43 and face each other. A gap 45 into which the stopping spacer 37 can enter can be secured.

In a state where the housing units 42 and 43 are stacked, the flexibility of the flexible band 35 is
The gap 45 is filled by pushing the double locking spacer 37 into the gap 45 between the back surfaces of the opposing elastic locking pieces 27, and the elastic displacement of each elastic locking piece 27 is restrained. Thus, a double locked state in which the locked state of the connection terminal 26 by the lock 27 is obtained.

As shown in FIG. 14, when the double locking spacer 37 is pushed into the gap 45, it is engaged with the front walls 42c, 43c of the housing units 42, 43 to maintain the fully fixed state. A locking projection 37b is provided.

The connector housing 41 forms a double locking spacer 37 which functions as a double locking member. The double locking spacer 37 is formed by stacking the housing units 42 and 43 together. It is integrally formed with a flexible band 35 that is connected to it. Accordingly, by placing the housing units 42 and 43 in a laminated state, the housing units 42 and 43 are automatically positioned at the predetermined temporary fixing position, and can be moved to the fixing position by a simple operation of pushing in thereafter.

Therefore, no complicated operation is required for positioning the double locking spacer 37 with respect to the housing units 42 and 43. In addition, the double locking spacer 37, which is a dedicated member functioning as a double locking member, is formed. However, since the double locking spacer 37 can be integrally formed as a single component and the labor required for assembling can be reduced, the first embodiment, The same effects as those of the second embodiment can be obtained, and the production cost can be reduced.

As shown in FIG. 15, in the case of the connector housing 41, when the connection terminal 26 is not fully inserted into the terminal accommodating chamber 29, the elasticity of the side where the connection terminal 26 is incompletely inserted is provided. Since the locking piece 27 is bent and the width of the gap 45 between the opposing elastic locking pieces 27 is narrowed, the double locking spacer 37 cannot be pushed into the gap 45, and the connection terminal 26 is incomplete. The occurrence of insertion can be reliably detected.

In the connector housing of the double locking structure of each of the above embodiments, the two housing units are connected by the flexible band. However, the number of the housing units is the same as that of the above embodiment. It is not limited to the case.
A configuration in which three or more arbitrary number of housing units are sequentially connected by a flexible band can be adopted. When three or more housing units are stacked,
In the housing unit, the terminal accommodating chambers are formed in two stages vertically, and the elastic engaging pieces of the upper terminal accommodating chamber are exposed on the upper outer surface, and the elastic engaging pieces of the lower terminal accommodating chamber are on the lower outer side. It is better to expose it on the surface.

[0045]

As described above, according to the connector housing of the double locking structure of the present invention, a separate double locking member can be provided in any one of the first to third aspects. Since it is not used, it can be molded as one part, and no troublesome work such as assembling a separate double locking member is required. Therefore, the labor required for the assembling operation can be reduced, and the molding process can be shortened to reduce the production cost.

In the connector housing of the double locking structure according to the first aspect, when the housing units connected in a stackable manner by the flexible band are stacked, they are exposed on the outer surface of each housing unit. The elastic locking pieces abut against each other to restrain the elastic displacement of each other, and a double locking state in which the locking state of the connection terminal by each elastic locking piece is locked is obtained. That is, instead of providing the double locking member specially, the elastic locking piece on the housing unit of the mating partner is utilized as the double locking member, and the double locking member is specially formed. As much as you don't have to
The structure can be simplified, reliability can be improved, and reduction in production cost can be promoted.

In the connector housing having the double locking structure according to the second and third aspects, the double locking spacer functioning as the double locking member is formed. The stopping spacer is integrally formed with a flexible band connecting the housing units to each other in a stackable manner,
By placing the housing units in a stacked state, the housing units can be automatically positioned at a predetermined temporary fixing position or a permanent fixing position. Therefore, no troublesome operation is required for positioning the double locking spacer with respect to the housing unit,
The double locking spacer, which is a dedicated member functioning as the double locking member, is formed. However, the spacer can be integrally molded as one part, and the labor required for assembly can be reduced.
The same effect can be obtained, and the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of a connector housing having a double locking structure according to the present invention.

FIG. 2 is a perspective view of an assembled state of the connector housing in FIG. 1;

FIG. 3 is a longitudinal sectional view of the connector housing in FIG. 2 in an assembled state.

FIG. 4 is a longitudinal sectional view showing an operation when a connection terminal in FIG. 3 is improperly mounted.

FIG. 5 is a perspective view of a main portion of a connector housing having a double locking structure according to a second embodiment of the present invention in an expanded state.

FIG. 6 is a front view of the connector housing in FIG. 5 in an unfolded state.

7 is a longitudinal sectional view of the connector housing in FIG. 6 in an unfolded state.

8 is a longitudinal sectional view showing an operation when the connection terminal in FIG. 7 is improperly mounted.

FIG. 9 is a longitudinal sectional view showing an operation when the connection terminal in FIG. 7 is properly mounted.

FIG. 10 is a perspective view of a main portion of a connector housing having a double locking structure according to a third embodiment of the present invention in an expanded state.

11 is a longitudinal sectional view of the connector housing in FIG. 10 in an unfolded state.

12 is a vertical sectional view showing the behavior of the double locking spacer when the housing units of the connector housing in FIG. 11 are stacked.

13 is a view as viewed in the direction of the arrow A in FIG. 11;

FIG. 14 is a longitudinal sectional view showing a fully fixed state of the double locking spacer of the connector housing in FIG. 11;

FIG. 15 is a longitudinal sectional view showing an operation when a mounting failure of the connection terminal of the connector housing in FIG. 11 occurs.

FIG. 16 is an exploded perspective view of a conventional connector housing having a double locking structure.

17 is a cross-sectional view showing an assembling operation of the double locking member in FIG.

[Explanation of symbols]

18, 31, 41 Double-locking connector housing 20, 21, 32, 33, 42, 43 Housing unit 20a, 21a, 32a, 33a, 42a, 43a Outer surface 22, 35 Flexible band 23 Laminated engagement piece 26 connection terminal 27 elastic locking piece 29 terminal accommodating chamber 35, 36 flexible band 37 double locking spacer 39 double locking projection

Claims (3)

[Claims] 1. A plurality of housing units, a flexible band connecting the two housing units to each other in a stackable manner, and a protruding portion of the one housing unit stacked on each other, and a hook portion at a front end is attached to the other housing unit. By engaging the engagement groove on the housing unit, a stacked engagement piece for connecting and fixing the stacked pair of housing units to each other in a stacked state is integrally formed, and the housing unit includes a connection terminal. A terminal receiving chamber having an elastic locking piece that locks the rear surface of the elastic locking piece is exposed to an outer surface laminated on another housing unit,
When the housing units are stacked one on the other, the elastic locking pieces exposed on the outer surface of each housing unit abut against each other and elastically displace each other. And
A connector housing having a double locking structure, wherein a double locking state in which a locking state of the connection terminal by the elastic locking piece is locked is obtained. 2. A plurality of housing units, a flexible band connecting the two housing units to each other in a stackable manner, and a protrusion protruding from the one housing unit stacked on each other and having a hook portion at the tip end of the other housing unit. A stacking engagement piece for connecting and fixing a pair of stacked housing units in a stacked state by engaging with an engagement groove on the unit; and the flexible band so as to be sandwiched between the stacked housing units. The housing unit has a terminal accommodating chamber having an elastic locking piece for locking the connection terminal, and is formed in one or two stages. And a double locking opening communicating with the terminal accommodating chamber is formed through an outer wall surface on which another housing unit is laminated. When the housing units are stacked on each other, the housing unit projects from the double locking opening to each terminal accommodating chamber and engages with a predetermined engaging portion of a connection terminal in the terminal receiving chamber. The connection terminal is double-locked by the engagement by the double locking projection and the engagement by the elastic locking piece when the housing units are stacked. A connector housing having a double locking structure, characterized in that: 3. A plurality of housing units, a flexible band connecting the two housing units to each other in a stackable manner, and a protrusion protruding from the one housing unit stacked on each other, and a hook portion at a tip end of the other housing unit being connected to the other housing unit. By engaging the engagement groove on the housing unit, a stacked engagement piece for connecting and fixing the stacked pair of housing units to each other in a stacked state, and the flexible so as to be able to advance and retreat in a gap between the stacked housing units. A double locking spacer formed on the band is integrally formed, and the housing unit has a terminal accommodating chamber having an elastic locking piece for locking the connection terminal. When the back surface is exposed to the outer surface to be stacked on another housing unit, a configuration is formed in which the housing units are aligned in one step or two steps. A gap that allows the double locking spacer to enter is secured between the back surfaces of the elastic locking pieces that are exposed on the outer surface of each housing unit and face each other, so that the housing units face each other in a stacked state. By pushing the double locking spacer into the gap between the back surfaces of the matching elastic locking pieces, the elastic displacement of each elastic locking piece is restrained, and the locking state of the connection terminal by each elastic locking piece is changed. A connector housing having a double locking structure, wherein a locked double locking state is obtained.