JPH0587837U - Male terminal structure of connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a male terminal structure of a connector capable of reducing insertion resistance. [Structure] The female terminal 2 has an elastic arm piece 7 having a slope in a direction in which the receiving path 6 of the male terminal 11 is narrowed. On the surface of the arm piece 7, there is a protrusion 10 having an arcuate cross section for increasing the contact pressure with the male terminal 11. On the top and bottom surfaces of the tip of the male terminal 11,
The inclined surfaces 11a are formed respectively. A guide groove 12 for relaxing contact with the protrusion 10 of the arm piece 7 is formed on the upper surface of the tip of the male terminal 11 along the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a male terminal structure of a connector.

[0002]

[Prior Art]

 FIG. 7 shows an example of the structure of a male terminal and a female terminal of a conventional connector (see, for example, Japanese Utility Model Laid-Open No. 63-56572). In this figure, 1 is a male terminal, 2 is a female terminal, each housed in a housing (not shown), and a lead wire 3 (the male terminal side is not shown) is connected to the base end side. The male terminal 1 has a plate-like shape, and inclined surfaces 1a for facilitating the insertion are formed on the upper and lower surfaces of the tip portion. The female terminal 2 is formed by press-molding a sheet of thin metal plate into a box shape, and has an insertion hole 2a for receiving the male terminal 1 at the front end.

The specific structure of the female terminal 2 will be described with reference to FIG. 6A (see, for example, Japanese Patent Laid-Open No. 2-306559), and the female terminal 2 is housed in the female connector housing 5. The front end insertion hole 2a is arranged so as to match the insertion hole 5a on the housing 5 side. The female terminal 2 has an elastic arm piece 7 and a fixed wall 8 that face each other with the receiving path 6 of the male terminal 1 interposed therebetween. The fixed wall 8 is configured as a wall parallel to the inserting direction of the male terminal 1, while the elastic arm piece 7 is arranged so as to have a gradient in a direction in which the receiving path 6 of the male terminal 1 is narrowed. That is, it is arranged with a slope so that it approaches the fixed wall 8 as it goes deeper from the entrance of the insertion hole 2a.

The arm piece 7 is composed of a strip-shaped plate piece curved inwardly in a U shape on the insertion hole 2a side, and in the direction of opening and closing the receiving path 6 with the curved portion 7a as a fulcrum. It is elastically deformable. The free end side of the elastic arm piece 7 is further folded back in a U shape to the side opposite to the fixed wall 8, and the tip thereof is in contact with the upper wall 9 parallel to the fixed wall 8, and the tip 7b of the elastic arm piece 7 is connected to another side. It is designed to bend and deform using the fulcrum as a fulcrum. Further, on the surface of the arm piece 7 facing the fixed wall 8, there is formed a projection 10 having an arcuate cross section for increasing the contact pressure with the male terminal 1.

When the male terminal 1 is inserted into the female terminal 2 having the above structure, the male terminal 1 pushes up the sloped arm piece 7 to move forward, as shown in FIG. As described above, the protrusion 10 on the surface of the arm piece 7 makes point contact with the surface of the male terminal 1 in a state where the arm piece 7 is completely pushed up against its elasticity, whereby the male terminal 1 and the female terminal 1 are contacted. The terminal 2 is electrically coupled.

As described above, in the arm piece 7 provided with the protrusion 10, the contact pressure between the male terminal 1 and the female terminal 2 increases, and stable electrical coupling is achieved.

[0007]

[Problems to be solved by the device]

 By the way, in the case where the arm piece 7 is provided with the protrusion 10 as described above, when the male terminal 1 is inserted, the tip thereof comes into contact with the surface of the protrusion 10, and thus the insertion resistance does not include the protrusion 10. There is a problem that it becomes larger than. That is, when the arm piece 7 is provided with the protrusion 10, when the male terminal 1 is inserted, the contact angle θ1 between the protrusion 10 and the male terminal 1 becomes large as shown in FIG. ..

For this reason, particularly when applied to a multipolar connector, there is a problem that the workability of coupling deteriorates. Also, if the insertion resistance is large, it may be mistaken for the insertion to be completed during the operation, and there is a possibility that the insertion may be left in a half-fitted state.

Therefore, an object of the present invention is to provide a male terminal structure of a connector that can reduce insertion resistance when combined with the above female terminal.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a female terminal having an elastic arm piece having a slope in a direction narrowing a receiving path of the male terminal, and a protrusion for enhancing a contact pressure with the male terminal is formed on a surface of the arm piece. In the male terminal structure of the connector to be inserted into and connected to the connector, a guide groove for relaxing contact with the protrusion at the time of inserting the terminal is formed at the tip end portion of the male terminal in opposition to the protrusion along the terminal insertion direction. It has a feature.

[0011]

[Action]

 When the male terminal having the above-mentioned configuration is inserted into the female terminal, the protrusion of the arm terminal passes through the guide groove of the male terminal at the initial stage when the tip of the male terminal pushes and opens the arm piece. As a result, the protrusion does not come into contact with the tip of the male terminal, or even if it comes into contact with the male terminal, it does not come into strong contact and the contact angle between the male terminal and the arm piece does not increase, and the insertion force is small.

[0012]

【Example】

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

FIG. 1 shows the initial state of inserting the male terminal 11 of the embodiment of the present invention into the female terminal 2, and FIG. 2 shows the configuration of the tip of the male terminal 11 of the embodiment of the present invention. There is. Since the female terminal 2 used here is completely the same as the conventional one shown in FIG. 6, the same reference numerals as those in FIG.

At the tip of the male terminal 11 obtained by processing a single metal plate, inclined surfaces 11a are formed on the upper and lower surfaces by press molding, and a guide groove having a semicircular cross section is formed at the center in the width direction of the upper surface. 12 is formed in a predetermined length along the longitudinal direction. The guide groove 12 faces the protrusion 10, and is formed with a depth and a width such that the protrusion 10 does not come into contact with the tip of the male terminal 1 when the tip of the male terminal 1 makes sliding contact with the surface of the arm piece 7. There is. Here, the bottom surface of the guide groove 12 is formed parallel to the inclined surface 11a. However, the bottom surface of the guide groove 12 may slightly contact the protrusion 10 as long as the contact is alleviated.

When the male terminal 11 having such a configuration is inserted into the female terminal 2, the inclined surface 11 a at the tip of the male terminal 11 contacts the surface of the arm piece 7 at the initial stage of insertion, and the inclined surface 11 a is the arm. Push up piece 7. At this time, the projection 10 passes through the inside of the guide groove 12 without contacting the bottom surface thereof. Therefore, the contact angle θ2 between the male terminal 11 and the arm piece 7 is the same as when the protrusion 10 is not provided, and the insertion resistance is as small as when there is no protrusion.

When the male terminal 11 is further inserted, the arm piece 7 moves upward, and the projection 10 and the bottom surface of the guide groove 12 come into contact with each other in a posture in which the slope is gentle as shown in FIG. Therefore, the contact angle θ2 at this time is smaller than that in the conventional example in which the projection 10 hits the male terminal 11 from the beginning, and the insertion resistance is small.

The relationship of the insertion force will be described with reference to the schematic diagram shown in FIG.

The load vector F1 when moving the surface when the contact angle of the male terminal 1 (11) is θ1 and the load vector F2 when moving the surface when the angle is θ2 are the insertion force F When is constant, the relationship of F2> F1 is established, and the latter can effectively use the insertion force. Therefore, the insertion force of the male terminal 11 of the embodiment of the present invention is smaller than that of the conventional male terminal 1.

Further, according to the male terminal 11 of the above embodiment, the guide groove 12 also serves to guide the protrusion 10. Therefore, it is possible to ensure the stability of the operation when inserting the male terminal.

Further, in the male terminal 11 of the above-described embodiment, the guide groove 12 is provided in the center to secure a large thickness on both sides thereof. Therefore, it does not reduce the strength of the male terminal tip.

In the above-described embodiment, the male terminal is formed by processing a single thin metal plate without bending, but as shown in FIG. 5, the thin plate is bent and stacked to form the male terminal 21. Of course you can do it. In that case, the guide groove may be formed by a method such as making a notch in a portion corresponding to the guide groove 12 at the stage of cutting the thin plate.

[0022]

[Effect of the device]

 As described above, according to the male terminal structure of the connector of the present invention, the protrusion does not come into contact with the tip of the male terminal at the time of inserting the terminal, or does not strongly come into contact with the tip of the male terminal. Therefore, when the terminal is inserted, the contact angle between the male terminal and the arm piece does not increase or is moderated, and the insertion resistance decreases. Therefore, even when applied to a multi-pole connector, insertion becomes easy. In addition, the half-fitted state is less likely to occur, and the reliability of the connection can be improved. After insertion, the protrusion makes a strong contact with the male terminal, and a reliable contact can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an initial state in which a male terminal according to an embodiment of the present invention is being inserted into a female terminal.

FIG. 2 is a perspective view showing a configuration of a tip of a male terminal according to an embodiment of the present invention.

FIG. 3 is a side cross-sectional view showing a middle state of inserting the male terminal of the embodiment of the present invention into the female terminal.

FIG. 4 is a side sectional view for explaining a difference in operation between the male terminal according to the embodiment of the present invention and the conventional male terminal.

FIG. 5 is a perspective view showing a configuration of a male terminal according to another embodiment of the present invention.

FIG. 6 is a diagram showing, in order, a state in which a male terminal is inserted into a female terminal in a conventional connector, (a) is a side sectional view showing a state before insertion, and (b) is an initial state of insertion. Is a side sectional view showing (c), and (c) is a side sectional view showing a state in which insertion is completed.

FIG. 7 is an external view of an example of a female terminal and a male terminal of a conventional connector.

[Explanation of symbols]

 2 female terminal 6 receiving path 7 arm piece 10 protrusion 11 male terminal 11a inclined surface 12 guide groove

Claims (1)

[Scope of utility model registration request] 1. A connector to be inserted and connected to a female terminal, which has an elastic arm piece having a slope in a direction of narrowing a receiving path of the male terminal, and a protrusion for increasing contact pressure with the male terminal is formed on a surface of the arm piece. In the male terminal structure described in (1) above, a guide groove for relaxing contact with the protrusion at the time of inserting the terminal is formed at the tip of the male terminal so as to face the protrusion along the terminal insertion direction. Terminal structure.