JP2012084402A - Terminal insufficient-insertion detection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal insufficient-insertion detection structure capable of improving durability and reliability of an insufficient-insertion detection jig by shortening the length of a lance check pin of the insufficient-insertion detection jig which is engaged with and attached on the front end of a connector housing, for improved strength of the lance check pin.SOLUTION: A connector housing 21 includes: a flexible band part 26 which connects the tip of a lance 23 with the front end of the connector housing 21, and deflects and displaces to a lance deflection space 24 side in accordance with deflection displacement of the lance 23; and a pin hitting part 27 which is formed to rise on the surface on the lance deflection space 24 side on the flexible band part 26. In the case a terminal bracket 11 attached to the connector housing 21 is insufficiently inserted, the tip of a lance check pin 32 inserted in a lance position checking hole 25 of the connector housing 21 hits against the pin hitting part 27, thus advancement of the lance check pin 32 is regulated.

Description

  The present invention provides a terminal half-insertion detection structure for detecting whether or not the terminal fitting in the connector housing is in a half-inserted state by attaching a half-insertion detection jig to the front end of the connector housing to which the terminal fitting is attached. About.

FIG. 7 shows a conventional terminal half insertion detection structure.
This terminal half-insertion detection structure is disclosed in the following Patent Document 1, and a half-insertion detection jig 121 is fitted and attached to the front end of a connector housing 111 to which a female terminal fitting 101 is attached, and a connector. It is detected whether the terminal fitting 101 in the housing 111 is in a half-inserted state.

  The connector housing 111 includes a terminal receiving hole 112 into which the terminal fitting 101 is inserted, a lance 113 having a locking projection 113a protruding into the terminal receiving hole 112, a lance bending space 114, and a lance position checking hole 115. Prepare.

  The lance 113 has a configuration in which a locking projection 113a is provided at the tip of an elastic piece 113b extending from the base end side of the connector housing 111 along the insertion direction of the terminal fitting 101 (the direction of the arrow X1 in FIG. 7). The locking projection 113 a prevents the terminal fitting 101 from coming off by engaging with the recess 103 at the rear end of the box portion 102 of the female terminal fitting 101.

  With the insertion of the terminal fitting 101 into the terminal receiving hole 112, the lance 113 is bent and displaced so that the locking projection 113a escapes out of the terminal receiving hole 112, and then the lance 113 is inserted into the normal position. The bending displacement is returned, and the terminal fitting 101 is prevented from being detached by the locking projection 113a.

  The lance bending space 114 is formed outside the terminal accommodating hole 112 and allows the lance 113 to be bent and displaced when the terminal fitting 101 is inserted.

  The lance position checking hole 115 communicates with the lance bending space 114 from the front end side of the connector housing 111 along the penetrating direction of the terminal accommodating hole 112.

  The half-insertion detection jig 121 fitted and attached to the front end of the connector housing 111 includes a lance check pin 122 inserted into the lance position check hole 115 and a conduction pin 123. The conduction pin 123 is provided in parallel with the lance check pin 122 and enters the terminal receiving hole 112 as the lance check pin 122 enters the lance position check hole 115.

  In the terminal half-insertion detection structure described above, when the terminal fitting 101 reaches the normal position and the terminal fitting 101 is normally prevented from being removed by the lance 113, the terminal fitting 101 is fitted to the front end of the connector housing 111. As shown in FIG. 7, the attached half-insertion detection jig 121 has the lance check pin 122 inserted into the lance bending space 114 without interfering with the lance 113, and at the same time, the conduction pin 123 is inserted into the tip of the terminal fitting 101. The conductive pin 123 and the terminal fitting 101 are electrically connected to each other. Therefore, it can be seen from the continuity check by the continuity pin 123 that the terminal fitting 101 is in the fully inserted state.

  On the other hand, when the terminal fitting 101 inserted into the terminal receiving hole 112 of the connector housing 111 has not reached the normal position and the lance 113 is bent and displaced into the lance bending space 114, the terminal fitting 101 is placed at the front end of the connector housing 111. When the half-insertion detection jig 121 is fitted and mounted, the tip of the lance check pin 122 collides with the tip of the lance 113, and the entry of the lance check pin 122 into the lance position check hole 115 stops halfway. End up.

  Accordingly, it is detected that the terminal fitting 101 is in a half-inserted state because the lance check pin 122 is not sufficiently inserted into the lance position checking hole 115 and contact between the conduction pin 123 and the terminal fitting 101 cannot be obtained. Is done.

Japanese Patent Laid-Open No. 7-161429

  However, as described in Patent Document 1, when the terminal fitting 101 is in the half-inserted state, the tip of the lance check pin 122 abuts on the tip of the lance 113, so that the lance check pin 122 enters the lance position check hole 115. In the terminal half-insertion detection structure in which the conduction pin 123 and the terminal fitting 101 are not in contact with each other due to insufficient entry, the portion of the lance check pin 122 that enters the lance position check hole 115 is shown in FIG. The length L1 must be larger than the distance L2 from the front end of the connector housing 111 to the tip of the lance 113, and the length of the lance check pin 122 is increased, resulting in a decrease in strength of the lance check pin 122. Occurred.

  When the strength of the lance check pin 122 is reduced, the lance check pin 122 is likely to be deformed or damaged when the half-insertion detection jig 121 is fitted and attached to the front end of the connector housing 111. There is a risk that a serious problem such as a drop or a decrease in reliability of the half-insertion detection of the terminal may cause a defect.

  Accordingly, an object of the present invention is to reduce the length of the lance check pin in the half-insertion detection jig fitted and attached to the front end of the connector housing in order to solve the above-mentioned problems, and to improve the strength of the lance check pin. By improving, it is providing the terminal half insertion detection structure which can improve the durability and reliability of the jig for half insertion detection.

The above-described object of the present invention is achieved by the following configuration.
(1) The connector housing includes a terminal receiving hole into which the terminal fitting is inserted, and a locking projection protruding into the terminal receiving hole, and the locking projection is inserted into the terminal receiving hole when the terminal fitting is inserted into the terminal receiving hole. A lance that is deflected so that it escapes out of the terminal receiving hole and then the terminal fitting is inserted to a normal position and then the deflection displacement is returned, and the locking projection is used to prevent the terminal fitting from coming off. A lance deflection space that allows deflection displacement, and a lance position check hole that communicates with the lance deflection space from the front end side of the connector housing along the penetrating direction of the terminal receiving hole,
The semi-insertion detecting jig fitted and attached to the front end of the connector housing is provided with a lance check pin inserted into the lance position check hole and in parallel with the lance check pin, and the lance position of the lance check pin. A conduction pin that enters the terminal accommodation hole as it enters the check hole;
In a state where the terminal fitting has not reached the normal position and the lance is bent and displaced in the lance bending space, the lance check pin does not sufficiently enter the lance position check hole, and the conduction pin A terminal half-insertion detection structure for detecting that the terminal fitting is in a half-inserted state by preventing contact with the terminal fitting,
A flexible band portion that connects the tip of the lance and the front end of the connector housing to the connector housing, and is deflected and displaced toward the lance deflection space in accordance with the deflection displacement of the lance, and the flexible band The lance check pin is inserted into the lance position check hole when the flexible band portion is bent and displaced toward the lance deflection space. A terminal half-insertion detection structure comprising: a pin abutting portion that abuts and restricts the entry of the lance check pin.

  According to the configuration of (1) above, the front end of the connector housing in a state where the terminal fitting attached to the connector housing has not reached the normal position and the lance in the connector housing is deflected and displaced into the lance deflection space. When the semi-insertion detection jig is fitted and mounted on the lance check pin, the tip of the lance check pin of the semi-insertion detection jig comes into contact with the pin abutting portion provided closer to the front end of the connector housing than the tip of the lance. , Lance check pin is not enough to enter the lance position check hole. Accordingly, it is detected that the conducting pin that enters the terminal accommodation hole with the entry of the lance check pin is insufficiently entered, the conducting pin and the terminal fitting are not in contact with each other, and the terminal fitting is in a half-inserted state.

  According to the configuration of (1) above, the length of the portion of the lance check pin that enters the lance position check hole should be longer than the distance from the front end of the connector housing to the pin abutting portion. Compared to the conventional case in which a length larger than the distance from the front end of the lance is set, the length of the lance check pin can be shortened and the strength of the lance check pin can be improved. The durability and reliability of the half-insertion detection jig can be improved by improving the strength of the lance check pin.

  According to the terminal half-insertion detection structure according to the present invention, the length of the portion of the lance check pin that enters the lance position check hole is longer than the distance from the front end of the connector housing to the pin abutting portion. Compared to the conventional case where a length larger than the distance from the front end of the lance is set, the length of the lance check pin can be shortened and the strength of the lance check pin can be improved. By improving the strength, the durability and reliability of the half-insertion detection jig can be improved.

It is a disassembled perspective view of one Embodiment of the terminal half insertion detection structure which concerns on this invention. It is a side view of the component of one Embodiment shown in FIG. (A) is the external appearance perspective view of the connector housing shown in FIG. 1, (b) is a front view of the connector housing of (a), (c) is AA sectional drawing of (b). (A) is a longitudinal cross-sectional view showing a state in which the terminal fitting is determined to be completely inserted by the half-insertion detecting jig fitted and attached to the front end of the connector housing shown in FIG. 1, (b) FIG. 3 is a longitudinal sectional view showing a state in which the terminal fitting is determined to be in a half-insertion state by a half-insertion detection jig fitted and attached to the front end of the connector housing shown in FIG. 1. (A) is a perspective view of a half-insertion detection device in which the half-insertion detection jig shown in FIG. 1 is set to be fitted and mounted on the front end of the connector housing, and (b) is a half-insertion detection device of (a), FIG. 6 is a perspective view of a state in which an insertion detection jig is fitted and attached to the front end of the connector housing. FIG. 6 is an enlarged perspective view of the half-insertion detection device shown in FIG. 5. It is a schematic explanatory drawing of the conventional terminal half insertion detection structure.

  Hereinafter, a preferred embodiment of a terminal half-insertion detection structure according to the present invention will be described in detail with reference to the drawings.

  1 to 4 show an embodiment of a terminal half-insertion detection structure according to the present invention. FIG. 1 is an exploded perspective view of an embodiment of a terminal half-insertion detection structure according to the present invention. FIG. FIG. 3A is an external perspective view of the connector housing shown in FIG. 1, and FIG. 3B is a front view of the connector housing of FIG. 3 (c) is a cross-sectional view taken along the line AA of FIG. 3 (b), and FIG. FIG. 4B is a longitudinal sectional view showing a state in which the mounting state is determined to be a complete insertion state. FIG. 4B is a diagram illustrating a terminal fitting mounted by a half-insertion detection jig fitted and mounted to the front end of the connector housing shown in FIG. It is a longitudinal cross-sectional view which shows the state determined to be a half insertion state.

  In the terminal half-insertion detection structure of this embodiment, a half-insertion detection jig 31 is fitted and attached to the front end of the connector housing 21 to which the female terminal fitting 11 is attached, so that the terminal fitting 11 in the connector housing 21 is fitted. It is detected whether or not is in a half-inserted state.

  As shown in FIGS. 1 and 2, the terminal fitting 11 includes a box 12 in which a tip of a male terminal fitting (not shown) is fitted, and a covering crimping piece for fixing the outer covering portion 2 a of the covered electric wire 2. 13 and a conductor crimping piece 14 for crimping and fixing the conductor portion 2b of the covered electric wire 2 are provided.

  In addition, a conduction check surface 15 is provided at the front end of the box portion 12 so that a conduction pin of a half-insertion detection jig 31 described later comes into contact therewith. Furthermore, a lance locking portion 16 is provided at the rear end of the box portion 12 to engage a lance in a connector housing 21 described later.

  As shown in FIGS. 1 and 2, the connector housing 21 includes a terminal accommodating hole 22 into which the terminal fitting 11 is inserted, a lance 23, a lance bending space 24, a lance position checking hole 25, and a flexible band. A portion 26 and a pin abutting portion 27 are provided. Further, as shown in FIG. 3, the connector housing 21 is provided with a lock arm 29 on its upper outer surface for locking the fitting state with the mating connector housing.

  In the case of the connector housing 21 of the present embodiment, as shown in FIG. 3, the terminal accommodating holes 22 are arranged in two rows in the vertical direction and in six rows in the width direction. In addition, the rear end side 22a of the terminal receiving hole 22 that opens to the rear end (base end) of the connector housing 21 serves as an insertion port for the terminal fitting 11, and thus opens wider than the front end side.

  Furthermore, a terminal insertion hole 22b through which the tip of a male terminal fitting (not shown) is inserted and a conduction pin of a half-insertion detection jig 31 to be described later are inserted into the tip of the terminal receiving hole 22. A pin insertion opening 22c is formed.

  The lance 23 includes an elastic piece 23b extending from the base end side of the connector housing 21 along the insertion direction of the terminal fitting 11 (the direction of the arrow X2 in FIG. 1), and an elastic piece 23b so as to protrude into the terminal receiving hole 22. It is the structure provided with the latching protrusion 23a protrudingly provided by the front end side.

  As shown in FIG. 4B, the lance 23 is bent toward the lance bending space 24 so that the locking protrusion 23 a escapes from the terminal receiving hole 22 with the insertion of the terminal fitting 11 into the terminal receiving hole 22. Displaced to allow insertion of the terminal fitting 11. When the terminal fitting 11 is inserted to the proper position, as shown in FIG. 4A, the locking projection 23a engages with the lance locking portion 16 to return the bending displacement, and the locking projection 23a. Thus, the terminal fitting 11 is brought into a retaining state.

  The locking projection 23 a engages with the lance locking portion 16 at the rear end of the box portion 12 of the female terminal fitting 11 to prevent the terminal fitting 11 from coming off.

  The lance deflection space 24 is formed in a parallel running state outside the terminal accommodation hole 22 and allows the lance 23 to be deflected and displaced when the terminal fitting 11 is inserted.

  The lance position check hole 25 communicates with the lance deflection space 24 from the front end side of the connector housing 21 along the penetrating direction of the terminal accommodating hole 22.

  The flexible band portion 26 connects the tip end of the lance 23 and the front end of the connector housing 21, and as shown in FIG. 4B, the flexible band portion 26 moves toward the lance deflection space 24 side as the lance 23 is deflected. Deflection is displaced. By providing the flexible band portion 26, the free end side of the lance 23 is elastically connected to the front end side of the connector housing 21, and the lance 23 is in a double-supported beam state.

  Further, the flexible band portion 26 is a thin band shape, and when the lance 23 is normally engaged with the lance locking portion 16 of the terminal fitting 11 as shown in FIG. The lance check pin 32 of a half-insertion detection jig 31 (described later) does not interfere with the entry into the lance deflection space 24.

  The pin abutting portion 27 is formed as a bulge on the surface of the flexible band portion 26 on the lance bending space 24 side. As shown in FIG. 4B, the pin abutting portion 27 is used for half-insertion detection inserted into the lance position check hole 25 when the flexible band portion 26 is deflected and displaced toward the lance bending space 24 side. The lance check pin 32 is abutted against the tip of the jig 31 to restrict the entry of the lance check pin 32.

  As shown in FIGS. 1 and 2, the half-insertion detection jig 31 includes a lance check pin 32 and a conduction pin 33.

  The lance check pin 32 is a shaft member inserted into the lance position check hole 25, and the terminal fitting 11 does not reach the normal position, and as shown in FIG. 4B, the lance 23 and the flexible band. In a state where the portion 26 is bent and displaced in the lance bending space 24, the tip 32a hits the pin abutting portion 27, and the insertion into the lance position checking hole 25 stops halfway. Further, the lance check pin 32 is shown in FIG. 4A when the terminal fitting 11 is in a completely inserted state and the lance 23 and the flexible band portion 26 are not bent and displaced in the lance bending space 24. Thus, when inserted through the lance position check hole 25, the length does not interfere with the pin abutting portion 27 and passes over the pin abutting portion 27 to the back of the pin abutting portion 27. Is set.

  The conduction pin 33 is provided in parallel with the lance check pin 32, and enters the conduction pin insertion port 22 c at the tip of the terminal accommodation hole 22 as the lance check pin 32 enters the lance position check hole 25.

  As shown in FIG. 4A, when the terminal fitting 11 is in a completely inserted state and the insertion of the lance check pin 32 into the lance position check hole 25 is normally completed, Abutting on the continuity check surface 15 of the terminal fitting 11 in the terminal accommodating hole 22, the terminal fitting 11 is electrically connected. In addition, as shown in FIG. 4B, the conductive pin 33 has the terminal fitting 11 in a half-inserted state, and the lance 23 and the flexible band portion 26 are displaced into the lance bending space 24 for displacement. When the insertion of the lance check pin 32 into the lance position check hole 25 stops halfway, the terminal fitting 11 is not in contact with the terminal fitting 11 and cannot be electrically connected to the terminal fitting 11. It can be detected that is in a half-inserted state.

  The terminal half-insertion detection process by the above-described half-insertion detection jig 31 is performed using the half-insertion detection device 51 shown in FIGS.

  The half-insertion detecting device 51 includes a jig holding means 52, a base 53, a housing fixing part 54, and an operation handle part 55.

  The jig holding means 52 holds the base end portions of the plurality of half-insertion detection jigs 31 corresponding to the arrangement pitch of the terminal receiving holes 22 in the connector housing 21. The plurality of half-insertion detection jigs 31 held by the jig holding means 52 can be collectively inserted into the connector housing 21 by a sliding operation of the jig holding means 52.

  The base 53 supports the jig holding means 52 so as to be slidable in the direction of the arrow X3 shown in FIG. 6 is a direction in which the semi-insertion detection jig 31 held by the jig holding means 52 is fitted into the connector housing 21.

  The housing fixing portion 54 is a mechanism that fixes and supports the connector housing 21 that houses the terminal fitting 11. The housing fixing portion 54 fixes and supports the connector housing 21 with the front end face of the connector housing 21 facing the jig holding means 52 side.

  The operation handle portion 55 is a part that slides the jig holding means 52 toward the connector housing 21. The operation handle portion 55 is half-insertion-detected supported by the jig holding means 52 by being tilted from the state shown in FIG. 5A toward the housing fixing portion 54 as shown in FIG. 5B. The jig 31 is slid and moved toward the connector housing 21.

  The operation handle portion 55 slides the jig holding means 52 via a booster mechanism such as a lever mechanism in order to reduce the operation force.

  In the terminal half-insertion detection structure of the embodiment described above, the terminal fitting 11 attached to the connector housing 21 does not reach the normal position, and the lance 23 in the connector housing 21 is deflected into the lance bending space 24. When the half-insertion detection jig 31 is fitted and attached to the front end of the connector housing 21 in this state, the tip 32a of the lance check pin 32 of the half-insertion detection jig 31 is more than the tip of the lance 23. The lance check pin 32 comes into contact with the pin abutting portion 27 provided near the front end of the connector housing 21 and the lance check pin 32 is insufficiently entered into the lance position check hole 25.

  Accordingly, as the lance check pin 32 enters, the conducting pin 33 that enters the terminal accommodating hole 22 also becomes insufficiently entered, so that the conducting pin 33 and the terminal fitting 11 are not in contact with each other, and the terminal fitting 11 is in a half-inserted state. It is detected that there is.

  In the terminal half-insertion detection structure of the embodiment described above, the length of the portion of the lance check pin 32 that enters the lance position check hole 25 is the distance from the front end of the connector housing 21 to the pin abutting portion 27. The length of the lance check pin 32 is shortened and the length of the lance check pin 32 is reduced as compared with the conventional case in which a length larger than the distance from the front end of the connector housing to the front end of the lance is set. Strength can be improved. The durability and reliability of the half-insertion detection jig 31 can be improved by improving the strength of the lance check pin 32.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 Terminal metal fitting 12 Box part 15 Conduction check surface 16 Lance latching part 21 Connector housing 22 Terminal accommodating hole 22c Conduction pin insertion port 23 Lance 24 Lance bending space 25 Lance position check hole 26 Flexible band part 27 Pin contact part 31 Semi-insertion detection jig 32 Lance check pin 33 Conduction pin

Claims (1)

The connector housing includes a terminal receiving hole into which a terminal fitting is inserted and a locking projection protruding into the terminal receiving hole, and the locking projection is inserted into the terminal receiving hole when the terminal fitting is inserted into the terminal receiving hole. A lance that is deflected so as to escape to the outside and the terminal metal fitting is inserted to a normal position and then returned to the deflection position so that the terminal metal fitting is prevented from being pulled out by the locking projection, and the bending displacement of the lance is changed. An allowable lance bending space, and a lance position check hole communicating with the lance bending space from the front end side of the connector housing along the penetrating direction of the terminal receiving hole,
The semi-insertion detecting jig fitted and attached to the front end of the connector housing is provided with a lance check pin inserted into the lance position check hole and in parallel with the lance check pin, and the lance position of the lance check pin. A conduction pin that enters the terminal accommodation hole as it enters the check hole;
In a state where the terminal fitting has not reached the normal position and the lance is bent and displaced in the lance bending space, the lance check pin does not sufficiently enter the lance position check hole, and the conduction pin A terminal half-insertion detection structure for detecting that the terminal fitting is in a half-inserted state by preventing contact with the terminal fitting,
A flexible band portion that connects the tip of the lance and the front end of the connector housing to the connector housing, and is deflected and displaced toward the lance deflection space in accordance with the deflection displacement of the lance, and the flexible band The lance check pin is inserted into the lance position check hole when the flexible band portion is bent and displaced toward the lance deflection space. A terminal half-insertion detection structure comprising: a pin abutting portion that abuts and restricts the entry of the lance check pin.

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