JPH11162549A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector capable of improving reliability of housing work of a terminal by easily and reliably detecting an incomplete housing state of the terminal. SOLUTION: This connector 10 has a connector housing 11 having a terminal housing chamber 12; a terminal 20 inserted/housed in the terminal housing chamber 12 from the rear side of the connector housing 11; and a rear holder 30 slidingly lockable in two stages of temporary locking and regular locking on a rear part of the connector housing 11 and locks the terminal 20 in the terminal housing chamber 12 by terminal locking parts 34. In this case, a pair of terminal locking parts 34 and 34 to lock the terminal 20 on the inner wall side of the terminal housing chamber 12 by being deflectively deformed at temporary locking time and being plastically deformed at regular locking time by insertion of the terminal 20, are arranged in the rear holder 30. The respective terminal locking parts 34 are made freely slidable in the longitudinal direction in the terminal housing chamber 12, positioned on the front side in the terminal housing chamber 12 at temporary locking time, and are positioned on the rear side in the terminal housing chamber 12 at regular locking time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal retaining portion of a rear holder which is detachably assembled to a rear portion of a connector housing to reliably prevent a terminal inserted into and accommodated in a terminal receiving chamber of the connector housing. Related to connectors.

[0002]

2. Description of the Related Art FIGS.
Are disclosed. As shown in FIGS. 8 to 11, the connector 1 includes a male connector housing 2 made of a synthetic resin having a terminal housing chamber 3, and inserted and housed in the terminal housing chamber 3 from the rear side of the male connector housing 2. Electric wire 5
The female terminal 4 is connected to the rear part of the connector housing 2 so as to be freely slidably locked in two stages of temporary locking and full locking. And a rear holder 6 made of a synthetic resin for engaging the terminal 4 in the terminal accommodating chamber 3.

[0003] As shown in FIG. 8, a locking portion 2 a for temporary locking and a locking portion 2 b for full locking are formed in the bulging portions on the rear portions on both sides of the male connector housing 2. Further, as shown in FIG. 10B, a notch 4a of the female terminal 4 is formed in the bottom wall 3a of the terminal accommodating chamber 3 of the male connector housing 2.
A flexible locking piece (so-called lance) 3b is formed integrally with the locking piece, and an incomplete insertion detecting stopper 3c having a tapered surface is formed. Further, a pair of flexible locking pieces 8, 8 are integrally formed on both right and left ends of the frame-shaped base portion 6a of the rear holder 6. On the front side of the upper and lower surfaces of each of the flexible locking pieces 8, temporary locking projections 8 which are locked to and separated from the respective temporary locking locking portions 2 a of the male connector housing 2.
a of the male connector housing 2 on the outer surface of each of the flexible locking pieces 8.
The main locking projection 8b which is locked and separated from the projection is protruded.

Then, as shown in FIGS. 10A and 10B, when the temporary locking projection 8a of the rear holder 6 and the locking portion 2a for temporary locking of the male connector housing 2 are temporarily locked. When the female terminal 4 is inserted into the terminal accommodating chamber 3 of the male connector housing 2, the distal end 7 a of the pair of terminal locking portions 7 of the rear holder 6 is moved by the female terminal 4 to the bottom wall 3 a of the terminal accommodating chamber 3. The female terminal 4 is bent toward the side, and the female terminal 4 is locked by the flexible locking piece 3b of the terminal accommodating chamber 3. When the base 6a of the rear holder 6 is further pushed into the rear side of the male connector housing 2 from the temporarily locked state, as shown in FIGS. The male locking portion 2b of the male connector housing 2 is fully locked, and the distal ends 7a of the pair of terminal locking portions 7, 7 of the rear holder 6 lock the female terminal 4.

[0005] A similar technique for the connector 1 is as follows.
It is disclosed in Japanese Utility Model Laid-Open Publication No. 2-34083.

[0006]

However, in the conventional connector 1, as shown in FIGS. 9 (a) and 9 (b), the distal end 7a of the terminal locking portion 7 of the rear holder 6 and the terminal accommodating chamber. 3 is provided with an escape space for the female terminal 4 to pass therethrough, so that the female terminal 4 is located at an intermediate position in the terminal accommodating chamber 3 as shown in FIG. In the case of the inserted halfway fit (incomplete accommodation), the tip 7a of the terminal locking portion 7 of the rear holder 6 is pushed down to the bottom wall 3a side of the terminal accommodation chamber 3, and from this state, the rear holder 6 When the base 6a is pushed into the rear portion of the male connector housing 2 with a slight force, the distal end 7a of the terminal locking portion 7 of the rear holder 6 rides over the tapered surface of the incomplete insertion detecting stopper 3b. There was a drawback that it entered the stop position. As a result, the female terminal 4 is not completely accommodated in the terminal accommodating chamber 3 of the male connector housing 2, and the female terminal 4 is doubled by the flexible locking piece 3 b and the tip 7 a of the terminal locking portion 7. There is a possibility that the connector 1 in which the terminals that are not locked are incompletely accommodated may be assembled.

Further, when the rear holder 6 is detached from the male connector housing 2 due to a difference in assembling of the electric wires 5 with terminals, etc., the main locking projection 8b of the rear holder 6 and the locking member for the final locking of the male connector housing 2 are provided. After the final locking state with the stop portion 2b is released, the temporary locking projection 8 of the rear holder 6 is further released.
a and the temporary locking state of the male connector housing 2 is released or twisted with a flathead screwdriver or the like. At this time, the temporary locking projection 8a and the temporary locking section There is a possibility that the protruding portion such as 2a is easily damaged and cannot be reused.

Accordingly, the present invention has been made to solve the above-mentioned problem, and a connector capable of easily and surely detecting an incompletely accommodated state of a terminal and improving the reliability of the operation of accommodating the terminal. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided a connector housing having a terminal accommodating chamber, a terminal inserted into and accommodated in the terminal accommodating chamber from a rear side of the connector housing. A rear holder that is slidably locked in two stages of a temporary lock and a full lock with respect to a rear portion and that locks the terminal into the terminal receiving chamber by a flexible terminal lock. A pair of terminals that are pressed and deformed toward the inner wall side of the terminal accommodating chamber by the insertion of the terminal at the time of the temporary locking, and are plastically deformed at the time of the final locking to lock a predetermined position of the terminal. A locking portion is provided, the pair of terminal locking portions is slidable in the front-rear direction in the terminal receiving chamber, and the pair of terminal locking portions are located on the front side of the terminal receiving chamber during the temporary locking. Characterized in that during the serial present locking and configured to position at the rear side of the terminal accommodating chamber.

In this connector, when the rear holder is slid so as to be pulled forward from the rear part of the connector housing so as to shift the rear holder from the provisionally locked state to the fully locked state, the terminals become a pair of terminals of the rear holder. It is securely locked by the tip of the locking portion. Further, even if the rear holder is slid from the temporarily locked state to the fully locked state in an incompletely housed state in which the terminals are not completely housed in the terminal housing chamber of the connector housing, the terminals are still in a pair of terminals of the rear holder. Since the terminal is not locked by the tip of the locking portion, the incompletely stored state of the terminal can be easily and reliably detected, and the reliability of the terminal storing operation is improved.

According to a second aspect of the present invention, there is provided the connector according to the first aspect, wherein the pair of terminal locking portions is provided on both right and left sides of a base of the rear holder, and each of the pair of terminal locking portions is provided. The rear end of the terminal can be freely locked by the tip.

In this connector, both ends of the rear portion of the terminal are securely locked by the respective ends of the pair of terminal locking portions of the rear holder, so that the reliability of the terminal accommodation operation is improved.

According to a third aspect of the present invention, there is provided the connector according to the first aspect, wherein the pair of terminal locking portions protrude below the base of the rear holder, and each of the pair of terminal locking portions is provided. The lower end of the terminal can be freely locked by a tip.

In this connector, the lower side of the terminal is securely locked by the respective ends of the pair of terminal locking portions of the rear holder, and the laterally projecting portion of each terminal locking portion is reduced. Can be reduced in size.

According to a fourth aspect of the present invention, there is provided the connector according to the second or third aspect, wherein the connector is locked and separated from a temporary locking projection provided on an upper surface of the connector housing above the base of the rear holder. While the flexible locking pieces having the projections are projected, the locking pieces are locked and separated from the main locking projections provided on both side surfaces of the connector housing at the right and left ends of the base of the rear holder. A pair of flexible engaging pieces having an engaging portion that protrudes.

In this connector, the rear holder can be easily detached from the rear portion of the connector housing by the flexible engagement piece of the rear holder and the like, so that the terminal replacement operation can be simplified and the operation time can be shortened.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is an exploded perspective view of a connector according to an embodiment of the present invention, FIG. 1B is a plan view showing a cross section of a part of a rear holder of the connector, and FIG. 2B is a cross-sectional view of the connector at the time of temporary locking, FIG. 3A is a perspective view of the connector at the time of full locking, and FIG. Sectional view at the time of final locking of the connector, FIG.
Is a cross-sectional view of a terminal of the connector in an incompletely housed state, and FIG. 5 is a plan view showing a released state of a rear holder of the connector.

As shown in FIGS.
A male connector housing (connector housing) 11 made of synthetic resin having a terminal accommodating chamber 12 and inserted into the terminal accommodating chamber 12 from the rear side of the male connector housing 11;
A female terminal (terminal) 20 to which the housed electric wire 21 is connected;
The rear part of the male connector housing 11 can be slidably locked in two stages of temporary locking and full locking, and the female terminal 20 is held in the terminal receiving chamber by a pair of flexible terminal locking portions 34. And a rear holder 30 to be locked in the inside 12.

As shown in FIGS. 1A and 3B, a terminal accommodating chamber 12 into which a female terminal 20 is inserted through a rear end opening 12a is formed in the center of the male connector housing 11. The terminal accommodating chamber 12 communicates with a front end opening 12b formed on the front side of the male connector housing 11, and the female accommodating chamber 12 contacts a pair of stoppers 12c, 12c provided near the front end opening 12b of the terminal accommodating chamber 12. The terminal 20 is inserted and accommodated. The position of the female terminal 20 that hits each stopper 12c of the terminal accommodating chamber 12 is the complete accommodating position, and the state that has not reached this position is the incomplete accommodating state (intermediately fitted state).
The terminal guide grooves 13 into which the terminal locking portions 34 of the rear holder 30 are inserted are formed below the inner walls on both sides of the terminal accommodating chamber 12.
Are formed respectively. Further, as shown in FIG. 2B, a pair of flexible locking pieces for locking a pair of notches 20a, 20a on the lower side of the female terminal 20 are provided on the front side of the bottom wall surface of the terminal accommodating chamber 12. (So-called lances) 14 and 14 are integrally formed.

As shown in FIGS. 1 (a) and 3 (a), a substantially semi-cylindrical temporary locking projection 15 is integrally formed at the center rear side of the upper surface 11a of the male connector housing 11. In addition, a substantially triangular prism-shaped main locking projection 16 is integrally formed on the rear side of the center of both side surfaces 11b. Further, upper and lower flange portions 17 and 18 for housing the base 31 of the rear holder 30 are integrally formed on the upper and lower surfaces 11a and 11c of the male connector housing 11 at the rear thereof. The upper surface 1 of the male connector housing 11
A flexible lock arm 19 is integrally formed on the male connector housing 11 so as to protrude from the female connector housing (not shown).

As shown in FIGS. 1A and 1B, the base 31 of the rear holder 30 has a frame shape into which the female terminal 20 is inserted.
A flexible locking piece 32 having a hook-shaped projection 32a which is locked to and separated from the temporary locking projection 15 on the upper surface 11a of the rim is integrally formed. The flexible locking piece 32 of the rear holder 30
When the projection 32a of the male connector housing 11 and the projection 15 for temporary locking of the male connector housing 11 are locked, this is the time of temporary locking (preset). Rear end opening 1 of chamber 12
2a.

The left and right sides of the base 31 of the rear holder 30 are provided on both sides 11 of the male connector housing 11.
A pair of flexible engaging pieces 33, 33 having rectangular engaging holes (engaging portions) 33a which are locked to and separated from the main locking projections 16b, 11b are integrally formed. . A tapered surface 33b into which the tip of a removal jig G such as a flathead screwdriver is inserted is formed inside the tip of each flexible engagement piece 33. Further, a pair of flexible portions that lock both sides of the rear portion 20b of the female terminal 20 with the respective tips 34a are provided on both left and right sides of the base portion 31 of the rear holder 30 (inside the pair of flexible engagement pieces 33, 33). The terminal locking portions 34, 34 are integrally formed to protrude. The length of the pair of terminal locking portions 34 and 34 is the same as the length of each terminal guide groove 13 of the male connector housing 11, and each end 34 a is formed by bending in a direction sandwiching both sides of the female terminal 20. I have. When the male connector housing 11 and the rear holder 30 are temporarily locked,
The insertion of the female terminal 20 causes the distal end 34 a of each terminal locking portion 34 of the rear holder 30 to be pressed and deformed toward the terminal guide groove 13 on the inner wall of the terminal accommodating chamber 12, and the rear holder 30 to be deformed.
When the main connector is slid toward the rear side of the male connector housing 11, the distal end 34a of each terminal locking portion 34 of the rear holder 30 is plastically deformed to lock both sides of the rear portion 20b of the female terminal 20. ing.

According to the connector 10 of the above embodiment, as shown in FIGS. 2 (a) and 2 (b), the flexible locking piece 32 of the rear holder 30 is provided on the temporary locking projection 15 of the male connector housing 11. At the time of the preset when the projection 32a is temporarily locked,
A pair of flexible terminal locking portions 34, 3 of the rear holder 30
Reference numeral 4 denotes a state completely accommodated in a pair of terminal guide grooves 13 on both sides of the terminal accommodating chamber 12 of the male connector housing 11. From this state, when the female terminal 20 to which the electric wire 21 is connected is inserted into the terminal accommodating chamber 12 of the male connector housing 11 via the frame-shaped base 31 of the rear holder 30, the two side portions 20 c of the female terminal 20 are used. Each end 3 of the pair of terminal locking portions 34, 34 of the rear holder 30
4a is bent toward each terminal guide groove 13 side. The female terminal 20 is connected to the stopper 12 c in the terminal accommodating chamber 12.
, The flexible locking piece 14 is locked in the cutout portion 20 a of the female terminal 20.

The female terminal 2 is formed by the flexible locking piece 14.
3A and 3B, when the rear holder 30 is slid so as to be pulled forward from the rear portion of the male connector housing 11, as shown in FIGS. The distal end 34a of the stop portion 34 is plastically deformed to lock both sides of the rear portion 20b of the female terminal 20. By locking the rear portion 20b of the female terminal 20 at the distal end 34a of each terminal locking portion 34, the engagement between each of the locking projections 16 of the male connector housing 11 and each of the flexible engagement pieces 33 of the rear holder 30 is achieved. The hole 33a is fully locked and locked.

As described above, the temporary locking projections 15 of the male connector housing 11 and the flexible locking pieces 3 of the rear holder 30 are provided.
From the state in which the temporary engagement with the second projection 32a is released, each final engagement projection 16 of the male connector housing 11 and the rear holder 3
0 until the engagement hole 33a of each flexible engagement piece 33 is fully locked.
As shown in FIG. 4, the female terminal 20 is connected to the male connector housing 11 by freely sliding within the pair of terminal guide grooves 13 on both sides of the terminal accommodating chamber 12 of the male connector housing 11. In the case of an incomplete accommodation state in which the terminal accommodation room 12 is not completely accommodated in the terminal accommodation room 12,
Both ends 20c, 20c of the female terminal 20 cause the distal ends 34a of the pair of terminal locking portions 34, 34 of the rear holder 30 to bend and deform toward the respective terminal guide grooves 13 so that the female terminal 20 is A pair of terminal locking portions 34, 34
, The incompletely accommodated state of the female terminal 20 can be easily and reliably detected.
The reliability of the housing operation of the female terminal 20 can be further improved.

Further, as shown in FIG.
0 is removed from the male connector housing 11,
Insert the distal end of a removal jig G such as a flathead screwdriver into the tapered surface 33b inside the distal end of each of the pair of flexible engaging pieces 33, 33 of the rear holder 30 to insert the male connector housing 1.
The rear holder 30 can be easily removed from the rear of the male connector housing 11 simply by releasing the main engagement between each of the main locking projections 16 and the engagement holes 33a of the respective flexible engagement pieces 33 of the rear holder 30. The male connector housing 11 is not damaged, and the main locking projections 16 are not damaged. Thereby, the rear holder 30 can be reused at the time of the terminal replacement operation, and the terminal replacement operation can be simplified and the operation time can be further reduced.

FIG. 6A is a perspective view showing a state before assembling a connector housing and a rear holder constituting a connector according to another embodiment of the present invention, and FIG. 6B is a sectional view of a part of the rear holder. , FIG. 7A is a cross-sectional view showing a state when the connector is temporarily locked, FIG. 7B is a cross-sectional view showing a state when the connector is fully locked, and FIG. FIG. 4 is a cross-sectional view showing an incompletely accommodated state of the terminal of the connector.

In the connector 10 ', a wide terminal guide groove 13' is formed on the bottom wall side of the terminal accommodating chamber 12 of the male connector housing 11 ', and the connector 10' is provided under the frame-shaped base 31 of the rear holder 30 '. A pair of terminal locking portions 34 ', 3
The point that the 4 'is integrally formed is different from the configuration of the embodiment. Other configurations are the same as the above embodiment,
The same components are denoted by the same reference numerals, and detailed description is omitted.

In the connector 10 'of the other embodiment,
As shown in FIG. 7A, the respective distal ends 34a of the pair of terminal locking portions 34 ', 34' of the rear holder 30 'are connected to the terminal guide grooves 1 by the female terminals 20 inserted into the terminal accommodating chamber 12.
As shown in FIG. 7B, when the rear holder 30 'slides from the rear portion of the male connector housing 11' to the front side, the terminals of the rear holder 30 'are locked. The tip 34a of the portion 34 'is plastically deformed upward to lock the female terminal 20. As a result, a pair of terminal locking portions 3 on the lower side of the base 31 of the rear holder 30 'are formed.
The notch 20a on the lower side of the female terminal 20 can be easily and reliably locked by the respective tips 34a of the 4 'and 34', and the reliability of the terminal accommodation operation can be improved.

Further, as shown in FIG.
In a case where 0 is not completely accommodated in the terminal accommodating chamber 12 of the male connector housing 11 ′, the female terminal 20 causes the pair of terminal locking portions 34 ′, 34 ′ of the rear holder 30 ′. Each of the distal ends 34a is bent and deformed toward the terminal guide groove 13 ', and the female terminal 20 is connected to each of the distal ends 34 of the pair of terminal locking portions 34', 34 'of the rear holder 30'.
Since the female terminal 20 is not locked, the incompletely accommodated state of the female terminal 20 can be easily and reliably detected, and the reliability of the accommodation operation of the female terminal 20 can be further improved. Further, since a pair of terminal locking portions 34 ', 34' are integrally formed below the frame-shaped base 31 of the rear holder 30 ', the laterally extending portions of each terminal locking portion 34' are reduced. Therefore, the size of the entire connector can be reduced.

In each of the above embodiments, the engagement portion of the flexible engagement piece of the rear holder which is engaged with the final engagement projection of the male connector housing is a rectangular engagement hole. It may be a groove. Further, the connector housing is not limited to the male connector housing, and it is needless to say that the above-described embodiments can be applied to the female connector housing.

[0033]

As described above, according to the first aspect of the present invention, the rear holder is pulled forward from the rear portion of the connector housing to shift the rear holder from the temporarily locked state to the fully locked state. Just by sliding, the terminal can be securely locked by the tips of the pair of terminal locking portions of the rear holder. Also, even if the rear holder is slid from the temporarily locked state to the fully locked state in an incompletely housed state in which the terminals are not completely housed in the terminal housing chamber of the connector housing, the terminals are still in a pair of terminals of the rear holder. Since the terminal is not locked by the tip of the locking portion, the incompletely stored state of the terminal can be easily and reliably detected, and the reliability of the terminal storing operation can be further improved.

According to the second aspect of the present invention, both ends of the rear portion of the terminal can be securely locked by the respective tips of the pair of terminal locking portions on the left and right sides of the base of the rear holder, and the reliability of the terminal storage operation is improved. Performance can be improved.

According to the third aspect of the present invention, the lower end of the terminal can be securely locked by the respective tips of the pair of terminal locking portions on the lower side of the base of the rear holder, and the reliability of the operation of housing the terminal is improved. Performance can be improved. In addition, since a laterally extending portion of each terminal locking portion can be reduced, the overall size of the connector can be reduced.

According to the fourth aspect of the present invention, the rear holder can be easily detached from the rear portion of the connector housing by the flexible engagement piece of the rear holder and the like, thereby simplifying and replacing the terminal. The time can be further reduced.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a state before assembling a connector housing and a rear holder constituting a connector according to an embodiment of the present invention, and FIG. 1B is a plan view showing a part of the rear holder in cross section. is there.

FIG. 2A is a perspective view showing a state at the time of temporary locking before inserting a terminal connected to an electric wire into the terminal receiving chamber of the connector, and FIG. 2B is a view showing a state at the time of temporary locking of the connector. FIG.

FIG. 3A is a perspective view illustrating a state of the connector when fully locked, and FIG. 3B is a cross-sectional view illustrating a state of the connector when fully locked.

FIG. 4 is a sectional view showing an incompletely accommodated state of the terminal of the connector.

FIG. 5 is a plan view showing a released state of a rear holder of the connector.

FIG. 6A is a perspective view showing a state before assembling a connector housing and a rear holder constituting a connector according to another embodiment of the present invention, and FIG. 6B is a side view showing a part of the rear holder in a cross section; FIG.

7A is a cross-sectional view illustrating a state of the connector according to the other embodiment at the time of temporary locking, FIG. 7B is a cross-sectional view illustrating a state of the connector at the time of full locking, and FIG. It is sectional drawing which shows the incomplete accommodation state of the terminal of a connector.

FIG. 8 is a perspective view showing a state before assembling a connector housing and a rear holder which constitute a conventional connector.

9A is a cross-sectional view showing an incompletely accommodated terminal of the conventional connector, and FIG. 9B is an enlarged cross-sectional view of a portion B in FIG. 9A.

FIG. 10A is a perspective view showing a state of the conventional connector at the time of temporary locking, and FIG. 10B is a cross-sectional view showing a state of the connector at the time of temporary locking.

FIG. 11A is a perspective view showing a state of the conventional connector at the time of final locking, and FIG. 11B is a cross-sectional view showing a state of the connector at the time of final locking.

[Explanation of symbols]

10, 10 'connector 11, 11' male connector housing (connector housing) 11a upper surface 11b, 11b both side surfaces 12 terminal accommodating chamber 15 provisional locking protrusion 16 locking protrusion 20 female terminal (terminal) 20b rear portion 30, 30 ′ Rear holder 31 base 32 flexible locking piece 32a projection 33, 33 a pair of flexible engaging pieces 33a engaging holes (engaging portions) 34, 34 a pair of terminal locking portions 34 ′, 34 ′ a pair of Terminal locking part 34a Tip

Claims (4)

[Claims] A connector housing having a terminal accommodating chamber; a terminal inserted into and accommodated in the terminal accommodating chamber from a rear side of the connector housing; A rear holder that is slidably locked in two stages and locks the terminal into the terminal receiving chamber by a flexible terminal locking portion. When the terminal is inserted, a pair of terminal locking portions are provided on the inner wall side of the terminal accommodating chamber so as to be pressed and deformed and plastically deform at the time of the final locking to lock a predetermined position of the terminal. A stopper is slidable in the front-rear direction in the terminal accommodating chamber, and the pair of terminal retaining portions are positioned on the front side of the terminal accommodating chamber at the time of the temporary locking, and the rear of the terminal accommodating chamber at the time of the final locking. Connector, characterized by being configured so as to be positioned. 2. The connector according to claim 1, wherein the pair of terminal locking portions project from left and right sides of a base of the rear holder, and each terminal of the pair of terminal locking portions is connected to the end of the terminal. A connector characterized in that both rear sides can be freely locked. 3. The connector according to claim 1, wherein said pair of terminal locking portions protrude below a base of said rear holder, and each of said pair of terminal locking portions is provided with a tip of said terminal. A connector characterized in that the lower side can be freely locked. 4. The connector according to claim 2, further comprising a projection above and below the base of the rear holder, the projection being locked to and separated from a temporary locking projection provided on an upper surface of the connector housing. While the flexible locking pieces are protrudingly provided, engaging portions that are locked to and separated from the main locking projections provided on both side surfaces of the connector housing are provided on both left and right sides of the base of the rear holder. A connector comprising a pair of flexible engagement pieces protruding therefrom.