JPH0850950A - Connector terminal locking structure and method of releasing the same - Google Patents

Abstract

(57) [Abstract] [Purpose] When releasing the lock of the terminal fitting inserted into the connector housing, the flexible arm of the case lance and the locking projection for retaining are not deformed or damaged. (EN) Provided are a terminal locking structure for a connector and a method for releasing the terminal locking structure that can easily release the terminal fitting by easily releasing the retaining state. A case lance 3 is provided with a flexible arm 6 extending forward from a chamber wall portion 5 defining a terminal accommodating chamber 4 in a direction in which a terminal fitting 23 is inserted, and a projecting end of the flexible arm 6. The retaining lock projection 8 is provided, and the auxiliary flexible arm 28 extends rearward from the base end of the flexible arm 6 in the insertion direction of the terminal fitting 23 and swings integrally with the flexible arm 6. . A spacer 22 which is inserted between the flexible arm 6 of the case lance 3 and the chamber wall portion 5 to bend the distal end portion of the flexible arm 6 toward the terminal fitting 23 side.
By being inserted between the auxiliary flexible arm 28 and the chamber wall portion 5, the tip of the flexible arm 6 is deflected toward the chamber wall portion 5 side, and the terminal fitting 2
The unlocking of 3 can be easily performed without using a tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector housing for a connector used for electrical connection between a vehicle wire harness and an electric / electronic device, and more specifically, for extracting a terminal fitting fitted into the connector housing. The present invention relates to a connector terminal locking structure for facilitating work and a method for releasing the terminal locking structure.

[0002]

2. Description of the Related Art Usually, a connector is used for electrical connection between a wire harness mounted on an automobile or the like and an electric / electronic device. This connector is composed of a connector housing made of synthetic resin, and a terminal fitting fixed to an electric wire end forming a wire harness inserted into the connector housing. In this connector housing, a plurality of terminal accommodating chambers for accommodating terminal fittings are provided,
A flexible case lance for preventing the terminal fitting from coming off is provided in the terminal accommodating chamber.

As shown in FIG. 9, a connector housing 1
Is a unitary molding made of insulating synthetic resin, and stores a plurality of terminal accommodating chambers 4 for accommodating and holding the terminal fittings 23 to which the electric wires 2 are connected, and a chamber wall 5 defining the terminal accommodating chambers 4.
A case lance 3A including a flexible arm 6 extending from the front toward the front in the insertion direction of the terminal fitting 23, and a retaining locking projection 8 protruding from the distal end of the flexible arm 6. There is. When the terminal fitting 23 is inserted from the rear end side opening 9 of the housing to a specified position in the terminal accommodating chamber 4, the retaining recess 7 of the terminal fitting 23 is engaged with the retaining projection 8 for retaining. Thus, the terminal fitting 23 inserted in the terminal accommodating chamber 4 is locked.

The terminal fitting 23 is provided with a sheath fixing portion 10 for crimping and fixing the insulating sheath portion of the electric wire 2 and a core wire fixing portion 11 for crimping the core wire of the electric wire 2 on the base end side, and the other end on the other end side. The terminal connecting portion 12 is provided for conducting connection with the terminal fitting. The locking recess 7 in this case is an opening formed at the rear end of the terminal connecting portion 12, but a locking hole may be formed in the substrate portion 13 of the terminal connecting portion 12 in some cases.

If it is necessary to pull out the terminal fitting 23 fitted into the connector housing 1 for maintenance, for example, the retaining projection 8 of the case lance 3A and the retaining recess of the terminal fitting 23 are retained. After the engagement with the wire 7 is released, the electric wire 2 is pulled in the pull-out direction.

The retaining projection 8 for retaining and the recess 7 for retaining
The engagement with is released by using a tool 15 such as a precision driver having a sharp tip. That is, as shown in FIG.
6 into the terminal accommodating chamber 4, and it is inserted between the tip of the flexible arm 6 and the terminal fitting 23. Next, as shown in FIG. 10, by pulling up the tip of the flexible arm 6 with a tool 15 to separate the retaining projection 8 for retaining from the recess 7 for retaining, the electric wire 2 can be pulled to obtain a terminal fitting. 23 can be easily extracted.

[0007]

However, the work of extracting the terminal fitting 23 as described above is performed by using the tool 1 with one hand.
Since the connector housing 1 must be held and the electric wire 2 must be pulled with the other hand while operating the connector 5, there is a problem that workability is poor. Further, since the retaining projection 8 for preventing disengagement at the tip of the flexible arm 6 is small and is made of resin and is soft, inconvenience such as deformation and damage occurs when the tip of the tool 15 made of metal is gouged. I was afraid.

Further, the front opening 16 of the housing which is used for inserting the tool 15 has a narrow front opening, and the terminal accommodating chamber 4
It is impossible to operate the tool 15 while visually recognizing the inside. Therefore, it is very difficult to insert the tip of the tool 15 between the tip of the flexible arm 6 and the terminal fitting 23, which further delays the work, or the flexible arm 6 of the case lance 3A or the detachment. There is also a problem in that the occurrence of inconveniences such as deformation and damage of the locking engagement projection 8 is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and when the locking of the terminal fitting fitted in the connector housing is released, the flexible arm of the case lance and the locking projection for retaining are deformed. It is an object of the present invention to provide a terminal locking structure for a connector and a method for releasing the terminal, which can easily release the terminal fitting without releasing the inconvenience such as breakage and easily release the retaining state.

[0010]

SUMMARY OF THE INVENTION The above object of the present invention is to provide a flexible arm which extends forward from a chamber wall portion defining a terminal accommodating chamber for accommodating and holding a terminal fitting, in the insertion direction of the terminal fitting. And a locking projection for retaining that is provided so as to project from the tip of the flexible arm toward the terminal accommodating chamber and that engages with a locking recess on the terminal fitting inserted into the terminal accommodating chamber. Is formed, and the locking recess is inserted into the terminal accommodating chamber to the specified position, and the retaining locking projection is engaged with the flexible arm and the chamber from the housing front end side opening communicating with the terminal accommodating chamber. The connector has a terminal locking structure in which the displacement of the flexible arm is prevented and the terminal fitting is prevented from coming off by inserting a spacer into the gap between the wall and the wall. From the base end of the flexible arm toward the rear of the terminal fitting insertion direction, Can be achieved by terminal retaining structure of a connector, characterized in that the auxiliary flexible arm that swings the flexible arm and integrally engaging portion as a fulcrum is formed.

Further, in the terminal locking structure of the connector, the above object can be effectively achieved by forming the claw-shaped projection at the center of the tip of the auxiliary flexible arm.

Further, in the above-described connector terminal locking structure, the spacer is generally inserted into the gap between the flexible arm and the chamber wall and the gap between the auxiliary flexible arm and the chamber wall. The wedge-shaped insertion portion is provided, and the plate thickness of the insertion portion is changed stepwise, whereby the above object can be effectively achieved.

Further, in the above-described connector terminal locking structure, the spacer insertion portion is formed in a comb-teeth shape corresponding to the arrangement of the claw-shaped projections and the terminal accommodating chambers, so that the above object is effectively achieved. Is something that can be achieved.

Further, the above object of the present invention is to provide a flexible arm extending forward from a chamber wall defining a terminal accommodating chamber for accommodating and holding a terminal fitting in the insertion direction of the terminal fitting, and the flexible arm. A case lance is provided that is provided so as to project from the tip of the arm toward the terminal accommodating chamber and that has a retaining locking protrusion that engages with a locking recess on the terminal fitting inserted into the terminal accommodating chamber. ,
The retaining projection is engaged with the retaining recess inserted into the terminal accommodating chamber to the specified position, and the opening between the housing front end side communicating with the terminal accommodating chamber is provided between the flexible arm and the chamber wall. This is a method of releasing the terminal lock of the connector in which the displacement of the flexible arm is prevented by inserting the spacer into the gap, and the terminal fitting is prevented from coming off. Auxiliary flexible arm that extends from the end opening toward the rear in the insertion direction of the terminal fitting from the proximal end of the flexible arm and can swing integrally with the flexible arm with the joint of the flexible arm proximal end as a fulcrum. It can be achieved by a method of releasing the terminal lock of the connector, characterized in that the retaining locking projection is released from the locking recess by being inserted into the gap between the lock chamber and the chamber wall.

[0015]

In the connector terminal locking structure of the present invention according to the present invention, the case lance extends rearward from the base end of the flexible arm in the insertion direction of the terminal fitting, and joins the base end of the flexible arm. An auxiliary flexible arm that swings integrally with the flexible arm around the fulcrum is formed. As a result, when the terminal fitting is inserted to the specified position inside the terminal housing chamber, the locking projection for retaining the distal end of the flexible arm that is formed to extend toward the terminal housing chamber fits into the locking recess of the terminal fitting. To do. After that, if a spacer is inserted from the opening on the front end side of the housing into the gap between the flexible arm and the chamber wall, the flexible arm is prevented from moving in the direction in which the fitting state is removed, and the terminal metal fitting is placed in the terminal accommodating chamber. It is locked in the locked state. At this time, the tip end of the flexible arm further bends toward the terminal fitting side as the spacer is inserted, and the auxiliary flexible arm swings integrally with the flexible arm to cause a claw-shaped projection on the tip end of the auxiliary flexible arm. Touches the chamber wall. Therefore, the case lance is supported at the two positions of the joint part of the base end of the flexible arm and the claw-shaped projection of the auxiliary flexible arm that is in contact with the chamber wall part, so that the terminal fitting can be locked more stably. Can be secured.

Further, the spacer is provided with a substantially wedge-shaped insertion portion which is inserted into a gap between the flexible arm and the chamber wall portion and a gap between the auxiliary flexible arm and the chamber wall portion. This is a configuration in which the plate thickness of the insertion portion changes stepwise. This makes it possible to adjust the bending amount of the flexible arm stepwise when the spacer is inserted into the auxiliary flexible arm side. For example, when inserting the terminal metal fitting into the terminal accommodating chamber, the flexible arm is inserted by the spacer inserted on the auxiliary flexible arm side so that the engagement degree of the retaining locking projection and the locking concave portion of the terminal metal fitting becomes shallow. It is possible to reduce the insertion force of the terminal fitting by adjusting the amount of bending of the terminal fitting.

Further, the insertion portion of the spacer is arranged in a comb-teeth shape corresponding to the arrangement of the terminal accommodating chambers. As a result, it is possible to collectively lock and unlock the plurality of terminal fittings.

Further, in the method of releasing the terminal lock of the connector having the above-described structure according to the present invention, the spacer inserted in the gap between the flexible arm and the chamber wall is removed to leave the terminal accommodating chamber. The housing extends from the rear end side opening of the housing toward the rear in the insertion direction of the terminal fitting from the base end of the flexible arm, and can swing integrally with the flexible arm around the joint of the base ends of the flexible arm as a fulcrum. By being inserted into the gap between the auxiliary flexible arm and the chamber wall, the retaining locking projection is released from the locking recess. That is, when the auxiliary flexible arm bends toward the terminal fitting, the tip end of the flexible arm that swings integrally with the auxiliary flexible arm bends in the direction of withdrawing from the terminal fitting, and is disengaged from the locking recess of the terminal fitting. The engagement with the locking engagement projection is released, and the electric wire connected to the terminal fitting can be pulled to easily pull out the terminal fitting from the connector.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the connector terminal locking structure and its releasing method according to the present invention will now be described in detail with reference to FIGS. 1 is a sectional view showing an embodiment of a connector terminal locking structure of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a cutaway perspective view taken along line AA of FIG.
4 is a sectional view of the case lance viewed from the direction of arrow B in FIG. 3, FIG. 5 is an explanatory view of the action when the spacer is inserted into the auxiliary flexible arm side, and FIG. 6 is a state in which the terminal fitting is unlocked. FIG.

As shown in FIG. 1, the connector housing 20
Is a connector used for electrical connection between a wire harness and an electric / electronic device, and is composed of a housing body 21 and a spacer 22 attached to the housing body 21. The housing body 21 and the spacer 22 are separate bodies, and both are made of insulating synthetic resin.

The housing body 21 has a plurality of terminal accommodating chambers 4 for accommodating and holding terminal fittings 23 to which the electric wires 2 are connected.
And a case lance 3 for locking the terminal fitting 23 in the terminal accommodating chamber 4. This case lance 3
Is a flexible arm 6 extending forward from the chamber wall portion 5 defining the terminal accommodating chamber 4 toward the front in the insertion direction of the terminal fitting 23, and inside the terminal accommodating chamber 4 from the tip of the flexible arm 6. A retaining locking projection 8 that engages with a locking recess 7 on the terminal fitting 23 projecting toward and inserted into the terminal accommodating chamber 4, and the insertion direction of the terminal fitting from the base end of the flexible arm 6. Flexible arm 6 extending rearward
It is composed of an auxiliary flexible arm 28 that swings integrally with the flexible arm with the joint portion 27 at the base end as a fulcrum. Therefore, when the terminal fitting 23 is inserted from the housing rear end side opening 9 to the specified position in the terminal accommodating chamber 4, the locking recess 7 of the terminal fitting 23 is engaged with the retaining locking projection 8. By inserting the spacer 22 from the front end side opening 16 of the housing, the terminal metal fitting 23 in the terminal accommodating chamber 4 is firmly prevented from coming off.

As shown in FIG. 2, the housing body 21 is of a two-pole type in which two terminal accommodating chambers 4 are provided in parallel. Further, the terminal fitting 23 is provided with a sheath fixing portion 10 for crimping and fixing the insulating coating portion of the electric wire 2 and a core wire fixing portion 11 for crimping the core wire of the electric wire 2, on the base end side.
A terminal connecting portion 24 for holding the tongue-shaped portion of a mating terminal fitting (not shown) is provided on the tip side. This terminal connection 2
Reference numeral 4 denotes a rectangular tubular outer shell portion 25 in which a locking recess 7 is formed in the lower plate portion, and a gap for holding the tongue portion of the mating terminal fitting with the upper plate portion of the outer shell portion 25. It is the structure provided with the curved spring piece 26 formed between them.

As shown in FIGS. 3 and 4, the case lance 3 extends rearward from the base end of the flexible arm 6 in the insertion direction of the terminal fitting, and the chamber wall portion 5 and the base end of the flexible arm 6 are extended. An auxiliary flexible arm 28 is provided that swings integrally with the flexible arm 6 with a joint 27 with the section as a fulcrum. When the flexible arm 6 bends toward the terminal fitting 23 side, the auxiliary flexible arm 28 swings toward the chamber wall portion 5 side, and the auxiliary flexible arm 28 is provided with a claw shape provided at the center of the tip end portion of the auxiliary flexible arm 28. The protrusion 29 contacts the chamber wall portion 5.

Further, as shown in FIGS. 3 and 4, the spacer 22 is inserted into the gap 30 between the flexible arm 6 and the chamber wall 5 from the housing front end side opening 16 communicating with the terminal accommodating chamber 4. By doing so, the distal end portion of the flexible arm 6 is attached to the terminal fitting 23
It bends to the side. That is, the retaining projection 8 for retaining
The engagement of the terminal metal fitting 23 with the locking recess 7 is deepened, and at the same time, the detachment locking projection 8 is prevented from bending of the flexible arm 6 in the direction of coming out of the locking recess 7. Then, when the spacer 22 is inserted into the gap 30 between the flexible arm 6 and the chamber wall portion 5 and the flexible arm 6 bends toward the terminal fitting 23 side,
The tip end portion of the auxiliary flexible arm 28 bends toward the chamber wall portion 5 side, and the above-mentioned claw-shaped projection 29 comes into contact with the chamber wall portion 5. Due to the reaction force when the claw-shaped projection 29 comes into contact with the chamber wall portion 5, the adhesive force between the flexible arm 6 and the spacer 22 is strengthened, and the resonance of the flexible arm 6 due to the vibration during traveling of the vehicle or the like. Is avoided, and the reliability of retaining is improved.

The substantially wedge-shaped insertion portion 31 to be inserted into the gap 30 of the spacer 22 is provided between the auxiliary flexible arm 28 and the chamber wall portion 5 from the housing rear end side opening 9 communicating with the terminal accommodating chamber 4. It is configured so that it can also be inserted into the gap 32.
By inserting the spacer 22 into the gap 32, the distal end portion of the flexible arm 6 bends in the direction of retracting from the terminal fitting 23,
The locking recess 7 of the terminal fitting 23 and the locking locking projection 8 are disengaged.

As described above, since the spacer 22 is also inserted into the gap 32 on the side of the auxiliary flexible arm 28, as shown in FIG. 5, the insertion portion 31 has a claw-shaped projection at the tip of the auxiliary flexible arm 28. A slit 33 is formed to avoid interference with 29. In addition, the insertion portions 31 of the spacers 22 that are inserted into the gaps 30 and the gaps 32 described above are arranged in a comb-teeth shape corresponding to the arrangement of the terminal accommodating chambers 4.

As described above, the connector housing 20 of this embodiment
Then, when the terminal fitting 23 is inserted into the terminal housing chamber 4 to the specified position, the retaining projection 8 for preventing the detachment of the flexible arm 6 which is formed to extend toward the terminal housing chamber 4 is attached to the terminal fitting 23.
Engages with the locking recess 7 of. Then, by inserting the spacer 22 from the opening 16 on the front end side of the housing into the gap 30 between the flexible arm 6 and the chamber wall 5, the distal end of the flexible arm 6 bends toward the terminal metal fitting 23 side and is prevented from coming off. As the degree of engagement between the locking projection 8 for locking and the recess 7 for locking deepens, the swinging of the flexible arm 6 in the direction of disengagement is prevented, and the locked state of the terminal fitting 23 is strengthened. .

Next, as shown in FIGS. 4 to 6, when it becomes necessary to pull out the terminal metal fitting 23 fitted in the connector housing 20 due to maintenance or the like, the flexible arm 6 is used.
The spacer 22 inserted into the gap 30 between the chamber wall portion 5 and the chamber wall portion 5 is removed, and the spacer 22 is inserted into the gap 32 between the auxiliary flexible arm 28 and the chamber wall portion 5. Then, the distal end portion of the flexible arm 6 bends in the direction of retracting from the terminal fitting 23,
The engagement between the locking recess 7 of the terminal fitting 23 and the retaining lock projection 8 is released. Therefore, the terminal fitting 23 can be easily pulled out from the housing body 21 by pulling the electric wire 2 connected to the terminal fitting 23.

That is, when it becomes necessary to pull out the terminal metal fitting 23 fitted in the connector housing 20, the spacer 22 is simply flexed without the need to go through the tip of the flexible arm with a tapered tool or the like. By simply replacing the arm 6 side with the auxiliary flexible arm 28 side, the retainer can be easily released. Therefore, it is possible to easily realize the withdrawal of the terminal fitting 23 without causing any inconvenience such as deformation or damage to the flexible arm 6 or the retaining projection 8 for preventing the terminal fitting 23 from coming off. .

The spacer 22 has a substantially wedge-shaped insertion portion 31 to be inserted into the gap 30 on the side of the flexible arm 6 and the gap 32 on the side of the auxiliary flexible arm 28, in accordance with the arrangement of the terminal accommodating chambers 4. Are arranged in a line. Therefore, the housing body 21
It is possible to collectively lock and unlock the plurality of terminal fittings 23 that are fitted into the terminal fittings 23.
It is possible to greatly improve the installation work and the extraction work of.

Next, another embodiment of the connector terminal locking structure and its releasing method according to the present invention will be described with reference to FIGS. 7 and 8. 7 is a cross-sectional view when the retainer of the terminal fitting is in the released state, and FIG. 8 is an enlarged perspective view of the spacer in FIG. As shown in FIG. 7, the connector housing 3
5 is a housing main body 21 having the same configuration as that of the above-described embodiment.
And a spacer 36 which is inserted into the housing body 21 and is used for locking and unlocking the terminal fitting 23 to prevent it from coming off.

The spacer 36 has a substantially wedge-shaped insertion portion 37 which is inserted into the gap 30 between the flexible arm 6 and the chamber wall portion 5 and the gap 32 between the auxiliary flexible arm 28 and the chamber wall portion 5. In addition to the provision, the insertion portion 37 is configured to change the plate thickness in two steps by the step portion 38. As shown in FIG. 7, the spacer 36 is inserted into the gap 32 between the auxiliary flexible arm 28 and the chamber wall portion 5 just before the step portion 38, so that the distal end of the flexible arm 6 comes off. The tip of the flexible arm 6 is bent toward the chamber wall 5 so that the locking engagement projection 8 engages with the engagement recess 7 of the terminal fitting 23 more shallowly than usual. When the step 38 is further inserted into the gap 32, the tip of the flexible arm 6 is further bent toward the chamber wall 5 side, and the retaining locking projection 8 is locked by the locking recess 7. The plate thickness of each step of the insertion portion 37 is set so as to be completely detached from the.

The spacer 36 having the above-described structure not only achieves the same effect as the spacer 22 of the above-described embodiment, but also the bending amount of the flexible arm 6 when the spacer 36 is inserted into the auxiliary flexible arm 28 side. It becomes possible to adjust in stages. Therefore, the retaining projections 8 and the retaining recesses 7 are previously provided.
The insertion of the terminal fitting 23 is performed by inserting the terminal fitting 23 with only the tip end side of the spacer 36 inserted into the gap 32 on the auxiliary flexible arm 28 side so that the degree of engagement with The required force can be reduced, and the workability when inserting the terminal fitting can be improved.

Needless to say, the connector housing of the present invention can be applied to a multi-pole type connector having three or more terminal accommodating chambers or a single pole connector. Further, in each of the above-described embodiments, the insertion portion is formed in a comb-teeth shape so that the plurality of terminal fittings fitted and inserted in one housing body can be collectively locked and unlocked so as to prevent the terminal fittings from coming off. Although the structure is such that they are connected in series, it is also possible to use an independent spacer for each terminal fitting.

[0035]

As described above, according to the connector terminal locking structure of the present invention and the method of releasing the same, the case lance extends rearward from the base end of the flexible arm in the insertion direction of the terminal fitting, An auxiliary flexible arm is formed that swings integrally with the flexible arm with the joint of the proximal ends of the flexible arms as a fulcrum. In addition, the spacer inserted in the gap between the flexible arm and the chamber wall,
It is detached and extended from the rear end side opening of the housing communicating with the terminal accommodating chamber toward the rear side in the insertion direction of the terminal fitting from the base end of the flexible arm, and is flexible with the joint part of the flexible arm base end as a fulcrum. By being inserted into the gap between the auxiliary flexible arm that can swing integrally with the arm and the chamber wall, the retaining locking projection is disengaged from the locking recess.

Thus, the terminal fitting can be easily pulled out from the connector housing by pulling the electric wire connected to the terminal fitting. That is, even if the tip of the flexible arm is not gouged with a tapered tool, the retaining state can be easily released by simply replacing the spacer from the flexible arm side to the auxiliary flexible arm side. it can. Therefore, without causing any inconvenience such as deformation or damage to the flexible arm or the retaining projection for retaining that is used for preventing the terminal fitting from coming off,
It is possible to easily extract the terminal fitting.

Further, the spacer is provided with a substantially wedge-shaped insertion portion which is inserted into the gap between the flexible arm and the chamber wall and the gap between the auxiliary flexible arm and the chamber wall. This is a configuration in which the plate thickness of the part changes stepwise. Accordingly, when the spacer is inserted on the side of the auxiliary flexible arm, the amount of bending of the flexible arm can be adjusted in stages, and the workability at the time of inserting the terminal fitting can be improved. Furthermore, the insertion portion of the spacer is arranged in a comb-teeth shape corresponding to the arrangement of the terminal accommodating chambers. This enables locking and unlocking of multiple terminal fittings at once, and greatly improves the work of inserting and removing the terminal fittings in a multi-pole connector housing. You can

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a terminal locking structure for a connector of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a cutaway perspective view taken along the line AA in FIG.

FIG. 4 is a cross-sectional view of the case lance as seen from the direction of arrow B in FIG.

FIG. 5 is an operation explanatory view when the spacer is inserted on the auxiliary flexible arm side.

FIG. 6 is a cross-sectional view when the locked state of the terminal fitting is released.

FIG. 7 is a cross-sectional view showing another embodiment of the connector terminal locking structure of the present invention.

FIG. 8 is a perspective view of a spacer shown in FIG.

FIG. 9 is a sectional view showing a terminal locking structure of a conventional connector.

FIG. 10 is a cross-sectional view of the terminal fitting shown in FIG. 9 when the terminal fitting is pulled out.

[Explanation of symbols]

 2 wire 3 case lance 4 terminal accommodating chamber 5 chamber wall 6 flexible arm 7 locking recess 8 retaining locking projection 9 housing rear end side opening 16 housing front end side opening 20 connector housing 21 housing body 22 spacer 27 Joint part 28 Auxiliary flexible arm 29 Claw-shaped projection 31 Insertion part 33 Slit 36 Spacer 37 Insertion part 38 Step part

Claims (6)

[Claims] 1. A flexible arm extending forward from a chamber wall defining a terminal accommodating chamber for accommodating and holding a terminal fitting, in the insertion direction of the terminal fitting, and a terminal from the tip of the flexible arm. A case lance is formed which is provided so as to project toward the accommodation chamber and has a retaining locking protrusion that engages with a retaining recess on the terminal fitting inserted into the terminal accommodation chamber. The retaining projection is engaged with the retaining recess that is inserted to a specified position in the chamber, and the flexible arm and the chamber wall are connected from the housing front end side opening communicating with the terminal accommodating chamber. A terminal locking structure for a connector, in which displacement of the flexible arm is prevented by inserting a spacer into a gap between the terminals, and the terminal fitting is prevented from coming off. Extends rearward from the base end of the arm in the insertion direction of the terminal fitting Terminal retaining structure of a connector, characterized in that the auxiliary resilient arm swings in the flexible arm integrally joining portion of the flexible arm base end as a supporting point is formed. 2. The terminal locking structure for a connector according to claim 1, wherein a claw-shaped projection is formed at a central portion of a tip of the auxiliary flexible arm. 3. The spacer has a substantially wedge-shaped insertion portion that is inserted into a gap between the flexible arm and the chamber wall portion and a gap between the auxiliary flexible arm and the chamber wall portion. The terminal locking structure for a connector according to claim 1, wherein the terminal locking structure is provided. 4. The terminal locking structure for a connector according to claim 3, wherein the plate thickness of the insertion portion changes stepwise. 5. The insertion portion of the spacer is configured in a comb shape corresponding to the arrangement of the claw-shaped projections and the terminal accommodating chambers. Connector terminal locking structure. 6. A flexible arm extending forward from a chamber wall defining a terminal accommodating chamber for accommodating and holding a terminal fitting, in the insertion direction of the terminal fitting, and a terminal from the tip of the flexible arm. A case lance is formed which is provided so as to project toward the accommodation chamber and has a retaining locking protrusion that engages with a retaining recess on the terminal fitting inserted into the terminal accommodation chamber. The retaining projection is engaged with the retaining recess that is inserted to a specified position in the chamber, and the flexible arm and the chamber wall are connected from the housing front end side opening communicating with the terminal accommodating chamber. A spacer is inserted into a gap between the terminals to prevent displacement of the flexible arm, thereby preventing the terminal fitting from coming off. From the rear opening of the housing that communicates with the storage chamber to the front An auxiliary flexible arm extending from the base end of the flexible arm toward the rear in the insertion direction of the terminal fitting and swingable integrally with the flexible arm with the joint portion of the base end of the flexible arm as a fulcrum and the chamber. A method for releasing terminal lock of a connector, characterized in that the retaining locking projection is released from the locking recess by being inserted in a gap between the locking portion and the wall.