JPS5826787B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a housing and terminal fittings constituting a connector, and in particular to the structure of a female housing housing a male terminal fitting and a female terminal fitting installed inside the male housing. Concerning a connector that has been devised so that it is easy to connect and disconnect, and that the force required for mating is reduced to prevent excessive loads from being applied to the terminal fittings, allowing a stable electrical connection to be maintained for a long period of time. .

A conventional connector generally has a configuration as shown in FIG.

That is, A is a female connector, which faces the fitting opening 1a of the female housing 1 and has the male terminal 3 of the male terminal fitting 2 projected therefrom.

B is a male connector, which is located in the terminal accommodating chamber 5 of the male housing 4.
A female terminal fitting 6 having an electrical contact portion 7 for the male terminal 3 is inserted therein.

As shown in FIG. 2, this electrical contact section 7 has frame pieces 9, 9 with a cross-section shaped like a letter L extending parallel to the axis on both sides of the front of the substrate section 8, and a distal end extending portion of the substrate section 8. An elastic tongue piece 10 is formed by folding back inside the frame pieces 9,9.

In use, both male and female connectors A are used.

B is fitted from opposite sides above the axis e, and the male terminal 3 is inserted into and brought into contact with the electrical contact portion T, thereby establishing an electrical connection of 2.6 with both male and female terminal metals.

However, according to the above configuration, the connection between the male terminal 3 and the electrical contact portion 1 relies solely on the contact load due to the elastic force of the elastic tongue piece '10.

Therefore, if the elastic tongue 10 has a strong elastic force, the connection state is stable, but if it is too strong, it becomes difficult to insert the male terminal 3.

Moreover, even if the elastic tongue piece 10 initially has sufficient elastic force,
The male terminal 3 is easily damaged due to repeated attachment/detachment or excessive force applied during attachment/detachment, and it is difficult to maintain a stable electrical connection for a long period of time considering the complex structure.

Further, in the above configuration, the force required to fit the male and female connectors A and B together is approximately equal to the force required to insert and fit the male terminal 3 into the electrical contact portion 7 against the elastic force of the elastic tongue piece 10.

Therefore, as the number of electrical components installed in automobiles increases, and the number of terminal fittings installed inside connectors increases, resulting in multi-polarization, the force required for mating increases, making the work cumbersome, and causing excessive force. A large load is easily applied, which in turn leads to deformation and damage to the terminal fittings and the housing, which ultimately makes it difficult to increase the number of pins in the connector.

The present invention was made with attention to the above-mentioned points, and by devising the structure of the electrical contact part of the female terminal fitting and the fitting opening of the female housing, it is easy to attach and detach, and the force required for fitting is improved. This prevents excessive loads from being applied to the terminal fittings, allowing a stable electrical connection to be maintained for a long period of time, and facilitating multi-polarization as less force is required for mating. [2] The purpose is to provide a connector that can be used.

The present invention will be explained below based on the drawings.

Reference numeral C denotes a female connector, and a box-shaped female housing 11 having a fitting opening 12 inside is detachably fitted to a printed circuit board 13 by an insertion member (not shown).

Reference numeral 14 denotes a bus bar terminal fixed to the printed circuit board 13, the upper part of which is bent parallel to the printed circuit board 13, and a flat male terminal 15 is formed at the tip.

This male terminal 15 passes through a through hole 16 in the housing rear wall 11a and projects into the fitting opening 12.

Although the above is a well-known structure, in the present invention, the inclined insertion guide portion 11 is provided in front of the uzing bottom wall 11b.

This inclined insertion guide portion 11 connects the male connector D to the fitting opening 12.
This is for guiding and inserting the connector while tilting it at a predetermined angle θ when fitting the connector.

On the other hand, the male connector D is constructed by inserting a female terminal fitting E into a male housing 18 which has a terminal accommodating chamber 19 inside and a male terminal insertion opening 20 in the front wall.

This female terminal fitting E has a wire connection part E1 at the rear and an electric contact part E2 at the front part, and the wire connection part E1 is provided with crimp clamp pieces 21 and 22 for the conductor and insulation coating of the wire,
The electrical contact portion E2 is formed by side plates 24 erected on both sides of the substrate portion 23.
, 24' upper part 24a.

24a' is bent inward to form a box-shaped terminal insertion opening for the male terminal.

The above is the same as the conventional one, but in the present invention, the electrical contact portion E
Protrusions 25, 25' and 26, 26' for contacting the male terminals are provided on the top plate and bottom plate of the device 2, respectively.

That is, the protrusions 25, 25' are located on the left and right side plate upper portions 24a.

In front of 24a', protrusions 26, 26' are provided on both rear left and right sides of base plate portion 23, respectively, to protrude inward.

The protruding positions of the protrusions 25 and 26 are shifted so that they are inclined to face each other, and the gap X at the tips of the protrusions 25 and 26 is set to be smaller than the thickness t of the male terminal 15.

Then, the diagonal line a connecting the tips of these protrusions 25 and 26 and the protrusion 2
If the angle of intersection with the tangent line S of 6 is α, then there is a relationship x=asinα.

The same applies to the protrusions 25' and 26'.

Further, 27 is a flexible locking arm having locking holes 27a provided on the left and right side walls of the female housing 11, 28 is a locking claw provided on the left and right side walls of the male housing 18, and 29 is a female terminal fitting. E shows the wire that is stuck.

Next, the effect will be explained.

As shown in FIG. 5, insert the male connector D into the inclined insertion guide 1.
When inserted into the fitting opening 12 of the female connector C along the line T, the male terminal 15 enters the electrical contact portion E2 without contacting any of the protrusions 25, 26, and the male connector D is inserted very smoothly. be able to.

That is, the gap between the tips of the protrusions 25 and 26 or the male connector D
is expanded by tilting it by an angle θ along the inclined insertion guide part 17 with respect to the horizontal line GL, and x'= a 5i
n(α+θ).

Therefore, the angle θ of the inclined insertion portion 17 is set in advance so that x'>t
By setting this so that the male connector D can be easily inserted.

Next, as shown in FIG.
When the connector D is rotated upward using the 8 points as a fulcrum and placed in a substantially horizontal state, that is, θ-0, the male terminal 15 is attached to the protrusion 25.26.
When it comes into contact with the wire, it bends, creating a stable electrical connection.

At this time, the locking claw 28 of the male housing 1B engages with the locking hole 27a of the male housing 11, and the male connector D is locked.

That is, as described above, the thickness t of the male terminal 15 and the protrusion 2
5 and 26 have a relationship of t>x, so a contact load corresponding to δ-tx is obtained.

At this time, the distances from the rear wall 11a of the housing of the female connector C to the contact points 01 and 02 between the male terminal 15 and the protrusions 25 and 26 are respectively n and m, and the force applied to the contact point 02 is P, and the force applied to the contact point 01 is P. Letting the reaction force due to R be 3m R=-(--1) n .

As is clear from the figure, since m>n, R>P always holds.

That is, a large force R can be obtained with a small force P.

Furthermore, when rotating the male connector D, force is applied to the rear end point 03, so the force required to connect the male terminal 15 and the electrical contact portion E2 is extremely small, and it is not necessary to fit the male and female connectors together as in the conventional case. It does not require a lot of force.

Therefore, it becomes easy to provide a multipolar connector by arranging a large number of terminal accommodating chambers in series.

7 to 9 show other embodiments of the present invention, in which the structure of the electrical contact E2 is changed.

That is, in FIG. 7, the front end extensions of the side plate upper parts 24a and 24a' are bent downward to form protrusions 30° 30 perpendicular to the axis, and protrusions 31 are formed on both rear sides of the base plate part 23. It is something.

In FIG. 8, extending portions facing each other are provided in the front of the side plate upper portions 24a and 24a', and these are bent downward to form a projecting piece 32 parallel to the axis.
゜32.

Further, in FIG. 9, the front end extending portions of the side plate upper portions 24a, 24a' are folded back to form an acute angle to form elastic projections 33, 33, and the front end extending portions of the base plate portion 23 are folded back and overlapped. The rear part of the folded plywood plate 34 is tilted upright to form an elastic protrusion 35.

The above-mentioned protruding pieces 30.32 and elastic protrusions 33 are provided diagonally opposite the protrusions 31.31 and elastic protrusions 35, respectively, and the gap at their tips is made smaller than the plate thickness of the male terminal. , the same effect as the projections 25 and 26 can be achieved.

FIG. 10 shows another embodiment of the present invention, in which the protrusions 25' and 26' are moved forward and backward relative to the protrusions 25 and 26, and the tip of the male terminal 15 is divided to form bipolar terminals 15a and 15.
A.

In this case, as a result of the male terminals 15 contacting each other separately on the left and right sides within the electrical contact portion E2, the contact between the two is further strengthened compared to a single pole.

The above description has been made of the case where protrusions are provided on both the left and right sides of the bottom plate and the top plate of the electrical contact portion E2, but the same effect can be obtained when one protrusion is provided each at approximately the center of the bottom plate and the top plate.

Furthermore, the female housing 11 is inserted into the printed circuit board 13,
Although an example has been described in which the busbar terminal 14 is used by protruding into the fitting opening 12, it is of course possible to create an independent configuration in which the male terminal fitting 2 is inserted, as in the female connector A shown in FIG. .

As explained above, the present invention provides an inclined insertion guide portion facing the fitting opening of a female connector having a male terminal fitting therein,
A male connector with a female terminal fitting inside is fitted using the screw principle, and both male and female connectors can be attached and detached extremely easily, and the connector can easily be made into multiple pins.

Since no excessive force is applied during fitting, it is possible to prevent deformation, damage, etc. of the housing and the female and male terminal fittings.

Furthermore, diagonally opposing protrusions for contacting the male terminal are provided on the bottom plate and the top plate of the electrical contact portion of the female terminal fitting, and the gap X at the tips of these protrusions is made smaller than the plate thickness t of the male terminal. Since it has such a simple structure, it is easy to manufacture.

Then, the male terminal contacts at least two places, and the δ−t
Since a contact load corresponding to -x is applied, a good electrical connection can be obtained.

Furthermore, since the electrical contact part of the female terminal fitting has a structure in which protrusions are provided directly on the structurally solid bottom plate and top plate, unlike conventional elastic tongue pieces, it is difficult to cause fatigue due to repeated attachment and detachment, and its lifespan is extended. be able to.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of main parts showing an example of a conventional connector;
The figures are the same (a perspective view showing an example of a conventional female terminal fitting, Fig. 3 is a cross-sectional view of a main part showing an example of the connector of the present invention, Fig. 4 is a perspective view of the same female terminal fitting E as described above, and Fig. 5 is a perspective view showing an example of a conventional female terminal fitting. Figures 1 and 6 are explanatory diagrams showing the operating state of the same as above, and Figures 1 to 9 are explanatory diagrams of other embodiments of the female terminal E according to the present invention, and in each figure, A is a perspective view thereof. , the mouth is a cross-sectional view of the central main part,
FIG. 10 is an explanatory diagram of another embodiment of the female terminal fitting E and the male terminal 15. C-... Female connector, D... Male connector, E... Female terminal fitting, E... Electrical contact part, 12... Fitting opening, 17... Inclined insertion guide part, 25, 26... Protrusion.

Claims (1)

[Claims] 1 Consisting of a female connector internally equipped with a male terminal fitting having a male terminal, and a male connector internally equipped with a female terminal fitting equipped with a box-shaped electrical contact portion for the male terminal, the lower wall of the fitting opening of the female connector An inclined insertion guide section for the male connector is provided at the front, and protrusions for contacting the male terminal are provided diagonally opposing each other on the top and bottom plates of the electrical contact section, and the gap X at the tips of these two protrusions is used to connect the male terminal. be smaller than the plate thickness t of
When the male connector inserted from the inclined insertion guide section is in the inclined insertion position, the horizontal positional interval X' between the tips of both the projections
2. A connector according to claim 1, wherein the male terminal has a thickness t which is larger than the plate thickness t of the male terminal, and the connector is configured to be rotated to a substantially horizontal position using the top of the inclined insertion guide portion as a fulcrum.