JP2009218177A - Plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug with improved electric reliability through appropriate retention of an electric connection state at all times of a conductive terminal of a receptacle with that of the plug. <P>SOLUTION: A first and a second contact parts 24b, 24c are formed at a tip part 24a of a conductive terminal 24 of the plug 21 at intervals with the receptacle 11 in an insertion direction of the plug 21. In case upward folding force acts on the plug 21 with an insertion-coupling part 22a of the plug 21 in an insertion-coupled state from an opening 17 of the receptacle 11, even if the first contact part 24b is away from a contact face 15b, the second contact part 24c comes in contact with the contact face 15b, so that an electric connection state of the conductive terminal 15 with the conductive terminal 24 is properly maintained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plug that constitutes an electrical connector together with a receptacle, and more particularly to an improvement in the structure of a conductive terminal of a plug that can prevent poor contact of the conductive terminal of the plug with the conductive terminal of the receptacle.

  As a receptacle and plug for an electrical connector, the one shown in FIG. 6 has been proposed. The receptacle 11 is attached to the circuit board 12, a shell 13 joined and fixed to the circuit board 12 by soldering, a synthetic resin housing 14 embedded in the shell 13, and insert molding in parallel with the housing 14. The plurality of conductive terminals 15 are formed. A base end portion 15 a of each conductive terminal 15 is soldered to a lead wire 16 provided on the circuit board 12. Each conductive terminal 15 is joined and fixed to the lower surface of a terminal block 14a formed integrally with the housing 14, and the lower surface of each conductive terminal 15 serves as a contact surface 15b.

  On the other hand, a plug 21 to be inserted into and removed from the connection opening 17 of the receptacle 11 includes a shell 22 having a cylindrical fitting portion 22 a inserted into and removed from the opening 17 and a housing 23 accommodated in the shell 22. And a plurality of conductive terminals 24 insert-molded in parallel with the housing 23. A mountain-shaped contact portion 24 b that is in contact with the contact surface 15 b of the conductive terminal 15 on the receptacle 11 side is formed on the top end 24 a of the conductive terminal 24.

  The fitting portion 22a of the plug 21 is inserted into the opening 17 of the receptacle 11 as shown in FIG. 7, and the contact portion 24b of the conductive terminal 24 is brought into contact with the contact surface 15b of the conductive terminal 15, so that the conductive terminal 15 and the conductive terminal are connected. 24 electrical connections are made.

Patent Document 1 discloses a configuration in which a tip portion of a contact as a conductive terminal has a mountain shape.
JP 2007-42398 A

  However, it has been found that the conventional plug 21 has the following problems because the contact portion 24b of the conductive terminal 24 has a mountain shape. That is, the fitting portion 22a of the shell 22 of the plug 21 is normally properly inserted into the receptacle 11 in a horizontal state as shown in FIG. 7, but an electric wire (not shown) connected to the plug 21 is caused by some factor. As shown in FIG. 8, when the plug 21 receives an external force upward as shown in FIG. 8, the intermediate portion of the fitting portion 22 a is bent within the elastic limit around the bending point P. In this case, since the distal end portion 24a of the conductive terminal 24 is displaced downward and the proximal end portion of the conductive terminal 24 on the housing 23 side is displaced upward due to the bending of the fitting portion 22a, the electrical conductivity with respect to the contact surface 15b of the conductive terminal 15 is increased. There is a problem that the contact pressure of the contact portion 24b of the terminal 24 is reduced or the contact portion 24b is brought into a non-contact state. For this reason, there is a problem in that the reliability of the electrical connection state between the conductive terminal 15 and the conductive terminal 24 is lowered, which hinders signal transmission.

  The present invention eliminates the above-mentioned problems in the prior art, and always maintains the electrical connection state of the contact portion of the plug's conductive terminal with respect to the contact surface of the conductive terminal of the receptacle to ensure electrical reliability. It is to provide a plug that can be improved.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that conductive terminals elastically deformable with respect to the housing are arranged in parallel at a plurality of locations, the housing is enclosed by a shell, and the tips of the respective conductive terminals are arranged. The side portion is accommodated in a cylindrical fitting portion provided at the front end portion of the shell, and the fitting portion is configured to be insertable into a connection opening formed at the distal end portion of the receptacle. In a plug configured to contact a contact surface formed in parallel to the insertion / extraction direction with respect to the receptacle-side conductive terminal, a contact portion provided on a side perpendicular to the plug insertion / extraction direction with respect to the receptacle, The gist is that the contact portion of the conductive terminal of the plug is formed by the first contact portion and the second contact portion so as to be separated from each other in the insertion / extraction direction.

The gist of a second aspect of the present invention is that, in the first aspect, the first and second contact portions are formed in a trapezoidal shape in a side view by a straight portion.
According to a third aspect of the present invention, in the first or second aspect, the gap between the back surface of the top plate of the fitting portion and the tips of the first and second contact portions of the conductive terminal is the same as the conductive terminal on the receptacle side. The gist is that the thickness is set smaller than the thickness of the back surface of the terminal block to be supported and the contact surface of the conductive terminal.

  The gist of the invention according to claim 4 is that, in any one of claims 1 to 3, the conductive terminal is press-molded with a plate material.

  According to the present invention, the first and second contact portions are formed at predetermined intervals in the plug insertion / extraction direction with respect to the opening of the receptacle with respect to the contact portion at the tip end portion of the conductive terminal, so that the plug is inserted into the receptacle. In this state, even if the external force acts on the fitting portion of the plug and the fitting portion bends and the first contact portion is separated from the contact surface of the conductive terminal, the second contact portion is brought into contact with the contact surface of the conductive terminal. The state is maintained. As a result, the electrical connection state of the contact portion of the conductive terminal of the plug with respect to the contact surface of the conductive terminal of the receptacle can always be properly maintained, and the electrical reliability can be improved.

Hereinafter, an embodiment of a plug embodying the present invention will be described with reference to FIGS.
The preconditions of the receptacle 11 and the plug 21 constituting the electrical connector of this embodiment are the same as those of the conventional receptacle 11 and plug 21 described in the background art.

  As shown in FIG. 4, the receptacle 11 is encased in a shell 13 having a joining tongue 13 a that is joined and fixed to the upper surface of the circuit board 12 by soldering, as shown in FIG. 1. The housing 14 includes a terminal block 14 a and a plurality of conductive terminals 15 that are insert-molded in parallel with the housing 14. The base end portion 15 a of each conductive terminal 15 is soldered to a lead wire 16 bonded and fixed to the circuit board 12. As shown in FIG. 1, an opening 17 for connecting the plug 21 is formed at the tip of the shell 13.

  On the other hand, as shown in FIG. 4, the plug 21 includes a shell 22 having a fitting portion 22 a inserted into and removed from the opening 17, a housing 23 contained in the shell 22, and a housing 23 in parallel. The plurality of conductive terminals 24 are formed by insert molding. Each conductive terminal 24 is formed by press-molding a conductive plate material. As shown in FIG. 4, a pair of left and right locking levers 25 are attached to the fitting portion 22 a of the shell 22 so as to be tiltable in the vertical direction, and claws 25 a are provided at the distal ends of both locking levers 25. The claw 25a is always urged upward by a spring (not shown). On the other hand, the top plate 13b of the shell 13 of the receptacle 11 has a locking hole 13c for locking the claw 25a of the locking lever 25 when the fitting portion 22a of the shell 22 is inserted into the opening 17. It is formed so as to penetrate in the vertical direction, and the connection state between the receptacle 11 and the plug 21 is stably maintained. As shown in FIG. 4, an electric wire 26 containing a conducting wire connected to the base end portion of each conductive terminal 24 is connected to the rear end portion of the shell 22.

Next, the configuration of the main part of the present invention will be described.
As shown in FIG. 1, a first contact portion 24b and a second contact portion 24c are formed on the top end 24a of the conductive terminal 24. The first and second contact portions 24 b and 24 c protrude from the tip end portion 24 a of the conductive terminal 24 to the side perpendicular to the insertion / extraction direction of the plug 21 with respect to the receptacle 11. As shown in FIG. 2, when the fitting portion 22 a of the plug 21 is inserted into the opening 17, the distal end portion 24 a comes into contact with the lower edge of the distal end of the terminal block 14 a of the housing 14, and each conductive terminal 24 is moved downward. An inclined portion 24d for elastic deformation is formed. As shown in FIG. 1, the distance L in the insertion / extraction direction of the plug 21 from the tip edge of the fitting portion 22a to the first contact portion 24b is set to 0.8 mm, for example. The first contact portion 24b and the second contact portion 24c are separated by a distance F of 0.4 mm, for example, in the range of 0.2 to 1.0 mm with respect to the insertion / extraction direction of the plug 21. Between the back surface 22c of the top plate 22b of the fitting portion 22a and the upper ends of the first and second contact portions 24b, 24c of the conductive terminal 24, for example, 0.2 mm within a range of 0.1 mm to 0.5 mm. The gap g is formed. The overall thickness t dimension between the upper surface (rear surface) of the terminal block 14a of the receptacle 11 and the lower contact surface 15b of each conductive terminal 15 is in the range of 0.2 to 1.0 mm, for example, 0. It is set to 4 mm, and the relationship of t> g is set. As shown in FIG. 2, the first and second contact portions 24b, 24c of the conductive terminal 24 are formed in a substantially trapezoidal shape when viewed from the side by a straight portion 24e.

  As shown in FIG. 1, when the plug 21 is not connected to the receptacle 11, the gap g of the first contact portion 24b of the conductive terminal 24 is slightly smaller than the same gap g of the second contact portion 24c. It is set to be. As shown in FIG. 2, when the plug 21 is connected to the receptacle 11, the conductive terminal 24 is elastically deformed so that the tip 24 a has the thickness t set larger than the gap g. The gap g is expanded by being displaced downward. In this state, the first and second contact portions 24 b and 24 c are brought into contact with the contact surface 15 b of the conductive terminal 15.

Next, operations of the receptacle 11 and the plug 21 configured as described above will be described.
When the plug 21 is connected to the receptacle 11 as shown in FIG. 2, when the electric wire 26 shown in FIG. 4 is pulled and an external force is applied to the plug 21 as shown in FIG. The fitting portion 22a is bent at the intermediate portion within the elastic limit of the fitting portion 22a with the lower edge of the top end of the top plate 13b of the shell 13 as a bending point P. The bending angle α of the fitting portion 22a is, for example, 9.6 degrees. Along with the bending of the fitting portion 22a described above, the conductive terminal 24 also tilts from the horizontal state shown in FIG. 2 so that the base end portion thereof is displaced upward. Therefore, the first and second contact portions 24b and 24c of the conductive terminal 24 are also inclined, the first contact portion 24b is separated from the contact surface 15b, and the second contact portion 24c is in contact with the contact surface 15b of the conductive terminal 15. Therefore, the contact state of the first contact portion 24b or the second contact portion 24c of the conductive terminal 24 with respect to the contact surface 15b of the conductive terminal 15 is always properly maintained, and the electrical connection state of both the terminals 15 and 24 is properly maintained. The

  The contact point Q with respect to the contact surface 15b of the first contact portion 24b of the conductive terminal 24 shown in FIG. 2 is not in the bent state of the fitting portion 22a shown in FIG. 3, but instead the second contact portion 24c on the contact surface 15b. Contacts and changes to contact point R. Therefore, the distance M between the straight lines K connecting the bending point P and the contact point Q or the contact point R is different, and the inclination angle β of the straight line K changes. In this embodiment, the distance M of the straight line K connecting the bending point P and the contact point R is, for example, 2.4 mm. The inclination angle β is, for example, 18.9 degrees. In the conventional configuration without the second contact portion 24c, although not shown, the distance M of the straight line K connecting the bending point P and the contact point Q is, for example, 2.7 mm, and the inclination angle β is, for example, 16.7 degrees. It becomes.

According to the plug 21 of the above embodiment, the following effects can be obtained.
(1) In the above-described embodiment, the first contact portion 24 b and the second contact portion 24 c are formed apart from the distal end portion 24 a of the conductive terminal 24 in the insertion / extraction direction of the plug 21 with respect to the receptacle 11. Therefore, in the connected state of the receptacle 11 and the plug 21 shown in FIG. 2, the fitting portion 22 a of the shell 22 is bent as shown in FIG. 3, and the first contact portion 24 b of the conductive terminal 24 is in contact with the conductive terminal 15. Even if it is separated from the surface 15b, the second contact portion 24b can be brought into contact with the contact surface 15b. Therefore, the electrical connection state between the contact surface 15b of the conductive terminal 15 of the receptacle 11 and the first contact portion 24b or the second contact portion 24c of the conductive terminal 24 of the plug 21 is always properly maintained, and electrical reliability is improved. Can be improved.

  (2) In the above embodiment, the back surface of the top plate 22b of the fitting portion 22a of the shell 22 and the conductive terminal than the thickness t of the upper surface of the terminal block 14a of the housing 14 and the contact surface 15b of the conductive terminal 15 The gap g between the 24 first contact portions 24b and the second contact portions 24c was set small. Therefore, as shown in FIG. 2, in the connection state of the receptacle 11 and the conductive terminal 24, the conductive terminal 24 can be elastically deformed to press the first and second contact portions 24b and 24c against the contact surface 15b. It is possible to maintain a proper connection state.

In addition, you may change the said embodiment as follows.
As shown in FIG. 5, the first and second contact portions 24b and 24c may be formed separately by eliminating the straight portion 24e of the conductive terminal 24. In this case, the contact area of the first or second contact portion 24b, 24c with respect to the contact surface 15b can be reduced to appropriately maintain the contact state.

  In the embodiment, as shown in FIG. 2, the first and the 24th and 24c are both in contact with the contact surface 15b of the conductive terminal 15 in the state where the plug 21 is connected to the receptacle 11, The height dimension, thickness t dimension, and gap g of the first and second contact parts 24b, 24c may be set so that only the contact part 24b contacts.

  In the embodiment, as shown in FIG. 2, the first and second contact portions 24b and 24c of the conductive terminal 24 are formed in a trapezoidal shape as viewed from the side, or in a semicircular shape as shown in FIG. However, it is not limited to this shape. For example, it may be formed into a wave shape as a whole, or may have any other shape.

  In the embodiment, as shown in FIG. 2, the contact surface 15 b of the conductive terminal 15 of the receptacle 11 is orthogonal to the paper surface, and the plate-like tip end portion 24 a and the first and second contact portions 24 b and 24 c of the conductive terminal 24 It was made parallel to the paper surface. Instead, for example, the contact surface 15b of the conductive terminal 15 is arranged so as to be parallel to the paper surface, and the front end portion 24a and the first and second contact portions 24b, 24c of the conductive terminal 24 are orthogonal to the paper surface. It may be arranged as follows.

The longitudinal cross-sectional view which shows one Embodiment which actualized the plug of this invention. The longitudinal cross-sectional view which shows the state which connected the plug with respect to the receptacle. The longitudinal cross-sectional view which shows the state which the plug etc. of the receptacle were connected and the fitting part of the plug bent. The separation perspective view of a receptacle and a plug. The partial side view of the front-end | tip part of the conductive terminal which shows another embodiment of this invention. The longitudinal cross-sectional view of the non-connection state which shows the conventional receptacle and plug. The longitudinal cross-sectional view of the connection state which similarly shows the conventional receptacle and plug. The longitudinal cross-sectional view which shows the state which the plug bent in the connection state of a receptacle and a plug similarly.

Explanation of symbols

g: Gap, 11 ... Receptacle, 13, 22 ... Shell, 13b, 22b ... Top plate, 14, 23 ... Housing, 14a ... Terminal block, 15, 24 ... Conductive terminal, 15b ... Contact surface, 17 ... Opening, 21 ... Plug, 22a ... fitting part, 22c ... back surface, 24a ... tip part, 24b ... first contact part, 24c ... second contact part, 24e ... straight line part.

Claims (4)

Conductive terminals that can be elastically deformed with respect to the housing are arranged in parallel at a plurality of locations, the housing is enclosed by a shell, and a front end portion of each conductive terminal is provided in a cylindrical fitting portion provided at a front end portion of the shell. The contact portion is configured to be inserted into a connection opening formed at the distal end portion of the receptacle, and provided on a side perpendicular to the plug insertion / extraction direction with respect to the receptacle with respect to the distal end portion of the conductive terminal. In the plug configured to contact the contact surface formed in parallel with the insertion / extraction direction with respect to the conductive terminal on the receptacle side,
The plug, wherein the contact portion of the conductive terminal of the plug is formed by a first contact portion and a second contact portion so as to be separated from each other in the insertion / extraction direction. The plug according to claim 1, wherein the first and second contact portions are formed in a trapezoidal shape in a side view by a straight portion. The gap between the back surface of the top plate of the fitting portion and the tips of the first and second contact portions of the conductive terminal according to claim 1 or 2, wherein the gap between the back surface of the terminal block that supports the conductive terminal on the receptacle side, A plug characterized by being set smaller than a thickness dimension with a contact surface of a terminal. The plug according to any one of claims 1 to 3, wherein the conductive terminal is press-molded with a plate material.

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