JP2000348806A - Terminal metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal metal fitting without falling off even when action is exerted to the direction of coming out after being mounted to a cavity. SOLUTION: In this terminal metal fitting, a lower surface of a connecting part 9 is provided with a locking hole for engaging an elastic engaging piece 4 projected on a housing side. A front end of the locking hole has an abutting surface 12 bent inside the connection part 9 to be capable of abutting on an engaging projection part 4A. Since a surface of the abutting surface 12 is unevenly knurled, the elastic engaging piece 4 is not bent and deformed even when force is exerted on the terminal metal fitting to the direction of coming out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting.

[0002]

2. Description of the Related Art FIGS.
674 shows an engagement mode between the terminal fitting 100 disclosed in Japanese Patent No. 674 and an elastic engagement piece 101 that engages with the terminal fitting 100. The elastic engaging piece 101 is formed integrally with a housing (not shown) made of a synthetic resin, and when the terminal fitting 100 is mounted in the cavity inside the housing, the elastic engaging piece 101 elastically engages with the engaging portion 102. Thus, the terminal fitting 100 is retained and retained.

In this terminal fitting 100, by forming the engaging portion 102 in a planar shape, it is possible to avoid contact between the resin and the fractured surface when the conductive plate material is pressed. Trying to prevent breakage and deformation.

[0004]

However, the terminal fitting 1
After the terminal fitting 100 is attached to the housing and a force is applied to the terminal fitting 100 via a wire (not shown) connected to the terminal fitting 100, the planar engaging portion 102 causes the elastic engaging piece 101 to move. Since it acts to bend downward, the elastic engagement piece 101 is bent and deformed in the direction of the arrow in FIG.
There is a possibility that the terminal fitting 100 may fall off the housing.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal fitting which is not likely to fall off even if an action in a detaching direction is exerted after being mounted in a cavity. Is to do.

[0006]

According to a first aspect of the present invention, there is provided a terminal fitting mounted in a cavity provided in a housing made of synthetic resin and provided in the cavity. And a contact surface with which the elastic engagement piece abuts. The contact surface is provided on the engagement portion. Is characterized by being subjected to uneven processing.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a connecting portion having a rectangular cylindrical shape, and a tab which is a connection partner enters into the contact portion so as to enter the tab in the direction of entry. An elastic contact piece that can be bent and deformed in a substantially vertical direction is provided, while the elastic engaging piece can be locked to a side surface of the connecting portion where the elastic contact piece is bent and deformed. And an excessive bending restricting piece that can restrict excessive bending of the elastic contact piece by contacting the elastic contact piece is formed upright at an opening edge of the locking hole, and The contact surface is formed on the excessive deflection restricting piece.

[0008]

According to the first aspect of the present invention, the abutting surface of the engaging portion is made uneven, so that the elastic engaging piece of synthetic resin abuts. Slip is restricted, and the effect of preventing the terminal fitting from coming off is improved.

According to the second aspect of the present invention, since the contact surface is formed on the excessive deflection restricting piece, it is not necessary to separately provide the two components.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> Next, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a state in which the terminal fitting 1 is mounted in the cavity 3 of the housing 2. The housing 2 is formed in a substantially rectangular parallelepiped shape by a synthetic resin, and a cavity 3 that opens in both the left and right directions in the drawing is provided inside the housing 2. The front (left side in the figure) of the cavity 3 has a small opening as a tab insertion hole 3A into which the tab 10 of the mating male terminal fitting can enter, while the rear of the cavity 3 has a terminal into which the terminal fitting 1 can be mounted. It is largely opened as a mounting hole 3B.

An elastic engaging piece 4 is formed integrally with a front lower wall surface of the cavity 3. This elastic engagement piece 4
A flexible space 13 is provided below the elastic member 4 so that the elastic engaging piece 4 can be elastically deformed in a direction substantially perpendicular to the mounting direction of the terminal fitting 1. An engagement projection 4A is provided on the upper surface near the front end of the elastic engagement piece 4, and is engaged with a locking hole 5 of the terminal fitting 1, which will be described later. The retainer is retained in the cavity 3. At the center of the cavity 3, a retainer mounting hole 6 that opens to the side surface of the housing 2 is provided, and in addition to the elastic engagement piece 4, a retainer 7 that double-stops the terminal fitting 1 is assembled. .

Next, the terminal fitting 1 will be described with reference to FIGS. The terminal fitting 1 is formed by bending a conductive plate material, and is provided at its rear end with a barrel portion 8 for caulking the covered electric wire W. At the front of the terminal fitting 1, there is provided a substantially prismatic connection portion 9 which can be connected to the tab 10 of the male terminal fitting. Inside the connection portion 9, an elastic contact piece 11 that can contact the tab 10 is provided so as to be elastically deformable in the vertical direction. On the bottom surface 9A of the connection portion 9, below the elastic contact piece 11, a locking hole 5 with which the engagement projection 4A can be engaged is provided.

The locking hole 5 is opened in a rectangular shape.
A front edge portion of the opening edge is folded up toward the inside of the terminal fitting 1, and an excessive bending restricting piece 14 is provided. The excessive bending restricting piece 14 is attached to the bottom surface 9 of the connecting portion 9.
When the elastic contact piece 11 is elastically deformed by a predetermined bending width by the insertion operation of the tab 10, the elastic contact piece 11 abuts on the lower surface side of the elastic contact piece 11 and is excessively bent. Is regulated. In the elastic contact piece 11, on the side where the front surface of the engaging projection 4A contacts,
An abutment surface 12 is provided. The contact surface 12 is provided with a plurality of grooves along the left and right directions of the terminal fitting 1.
As a whole, knurling of an uneven shape is performed.
Therefore, when the contact surface 12 comes into contact with the engagement projection 4A, the frictional force acting between the contact surface 12 and the engagement projection 4A is improved.

Next, the operation and effect of this embodiment will be described with reference to FIG. When the terminal fitting 1 is pushed into the cavity 3 of the housing 2 from the terminal mounting hole 3B side, the bottom surface 9A of the connecting portion 9 comes into contact with the elastic engaging piece 4 so that the elastic engaging piece 4 is pressed downward. Then, it is elastically deformed toward the bending space 13 side. When the terminal fitting 1 is pushed into a predetermined position, the elastic engaging piece 4 reaches the locking hole 5, the engaging projection 4A fits into the locking hole 5, and the elastic engaging piece 4 is deformed to return. . Thus, the terminal fitting 1 is stopped by the elastic engagement piece 4.

In this state, when a force is applied to the terminal fitting 1 in the direction of pulling out of the housing 2, the contact surface 12
And the engaging projection 4A come into contact with each other. At this time, since the contact surface 12 has been subjected to knurling of an uneven shape, the frictional force acting between the two 4A, 12 is increased, and the elastic engagement piece 4 made of synthetic resin and metal are used. The sliding is restricted even if the contact surface 12 comes into contact with the contact surface 12. Therefore, it is possible to prevent a situation in which the elastic fitting piece 4 is bent and deformed, and the terminal fitting 1 falls off. Further, since the contact surface 12 is formed on the excessive bending restricting piece 14 for restricting the excessive bending of the elastic contact piece 11, there is no need to separately provide the two components.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, an engaging portion 20 is provided on the upper rear end side of the connecting portion 9 provided on the front portion of the terminal fitting 21. The engagement portion 20 is formed in a planar shape by bending the rear end edge of the connection portion 9 inward in a substantially vertical direction. In the engaging portion 20, the surface of the elastic engaging piece 4 on the side in contact with the engaging protrusion 4A is subjected to knurling of an uneven shape. In this embodiment, the engaging portion 2
0 and the elastic contact piece 11
Not provided.

According to the terminal fitting 20 of the present embodiment formed as described above, when a force is applied to the terminal fitting 21 in the removal direction while the terminal fitting 20 is mounted in the cavity 3, The engaging portion 20 and the engaging protrusion 4A come into contact with each other, but since the surface of the engaging portion 20 is knurled, a downward action may be applied to the engaging protrusion 4A. Be avoided. Therefore, it is possible to prevent the elastic engagement piece 4 from being bent and deformed, and the terminal fitting 21 from falling off.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, the following ones are also included in the technical scope of the present invention. In addition, the technical scope of the present invention extends to an equivalent range. (1) In the present embodiment, only the terminal fittings 1 and 20 are shown on the female side. However, according to the present invention, the terminal fittings on the male side may be used. (2) In the first embodiment, the elastic contact piece 11 is configured to be able to bend and deform in the vertical direction, and the engagement hole 5 is formed in the bottom surface 9A of the connection portion 9.
However, according to the present invention, the elastic contact piece may be made to be able to bend and deform in any direction, and the locking hole may be provided on the surface on which the elastic contact piece bends and deforms. .

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view when a terminal fitting is incorporated in a connector in a first embodiment.

FIG. 2 is a side view of a terminal fitting.

FIG. 3 is a side sectional view of a connecting portion of a terminal fitting.

FIG. 4 is a partially broken perspective view showing a state before engagement between a terminal fitting and an elastic engagement piece.

FIG. 5 is a side sectional view when the terminal fitting and the elastic engagement piece are engaged.

FIG. 6 is a perspective view of a terminal fitting according to a second embodiment.

FIG. 7 is an enlarged perspective view of an engagement portion of the terminal fitting.

FIG. 8 is a partial side sectional view when the terminal fitting and the elastic engagement piece are engaged.

FIG. 9 is an enlarged perspective view of an engagement portion of a terminal fitting in a conventional example.

FIG. 10 is a partial sectional side view when a terminal fitting and an elastic engagement piece are engaged in a conventional example.

[Explanation of symbols]

 1, 21 ... terminal fittings 2 ... housing 3 ... cavity 4 ... elastic engaging pieces 5 ... locking holes (engaging portions) 9 ... connecting parts 9A ... bottom surface (side surfaces) 10 ... tabs 11 ... elastic contact pieces 12 ... abutment Surface 14: Excessive deflection restricting piece 20: Engagement portion

Claims (2)

[Claims] 1. A terminal fitting provided in a cavity provided in a housing formed of a synthetic resin and having an engaging portion engageable with an elastic engaging piece provided in the cavity. A terminal fitting, wherein the engaging portion is provided with a contact surface with which the elastic engaging piece is in contact, and the contact surface is subjected to an uneven process. 2. A connection portion having a rectangular cylindrical shape, and an elastic contact piece which is capable of being bent and deformed in a direction substantially perpendicular to the entry direction of the tab by the entry of a tab to be connected is provided in the contact portion. On the other hand, on the side surface of the connecting portion where the elastic contact piece bends and deforms, a locking hole for locking the elastic engaging piece is opened, and On the opening edge, an excessive bending restricting piece that can restrict excessive bending of the elastic contact piece by contacting the elastic contact piece is formed upright, and the contact surface is formed on the excessive bending restricting piece. The terminal fitting according to claim 1, wherein: