Contact element and printed board connector

Abstract

The utility model relates to a connector which is used for a printed board and comprises a plurality of mutually insulated electric contact elements, in particular to a contact element and a printed board connector. After the contact piece is installed in the insulator, the first clamping projection is clamped and matched with the vertical groove wall of the clamping cantilever avoiding groove on the insulator, and the end part clamping projection is clamped and matched with the vertical groove wall of the end part avoiding groove on the insulator, so that the contact piece and the insulator are oppositely clamped left and right in the width direction of the insulator; meanwhile, when the contact element is subjected to an outward pressing acting force of an adaptive contact element, acting forces in the vertical direction are respectively provided for the corresponding vertical groove walls through a first clamping convex position and an end part clamping convex position, the directions of the two acting forces do not cause outward expansion and deformation of the vertical side walls of the insulator, and the distance between the two acting forces is shortened, so that the contact element is prevented from being damaged. A large torque is not caused, and deformation of the insulator is not easy to cause. Therefore, the plugging conduction reliability of the connector in use is improved on the whole.

Description

Technical Field

[0001] The utility model relates to a connector for a printed board, comprising a plurality of mutually insulated electrical contacts, in particular to a contact and a printed board connector. Background Art

[0002] With the continuous development of communication technology, connectors are gradually moving towards miniaturization and high density, especially board-to-board connectors used on printed circuit boards, which are becoming increasingly miniaturized and high-density.

[0003] like Figure 1 The structure of a conventional connector used on a printed circuit board in a plug-in state with an adapter connector is shown. This connector includes an insulator and a contact installed in the insulator. The insulator as a whole is a long strip of open slot structure, including a horizontal bottom wall 10 and vertical side walls 11 on both sides of the horizontal bottom wall 10 in the width direction. The notch between the two vertical side walls 11 forms a plug-in cavity for inserting the adapter connector. The two ends of the horizontal bottom wall 10 in the length direction have two vertically extending end plates. Two rows of contact installation grooves are provided on the horizontal bottom wall 10 of the insulator at positions corresponding to the two vertical side walls 11 along the length direction of the insulator, and the contact 2 is installed from the side of the horizontal bottom wall 10 that is away from the notch. The outer side surface of the upper end of the vertical side wall is provided with an anti-mistake groove for cooperating with the anti-mistake protrusion on the adapter insulator.

[0004] The structure of the contact is as follows Figure 1 As shown, it mainly includes a horizontal section 20 and three cantilever sections on the horizontal section 20, the three cantilever sections include a contact cantilever 21 inclined from bottom to top toward the plug-in cavity, and a first clamping cantilever 22 and a second clamping cantilever 23 on the outside of the contact cantilever, wherein the second clamping cantilever 23 is on the outside of the vertical side wall, and is clamped and fixed to the vertical side wall by a clamping tip 24 thereon, and a contact cantilever avoidance groove 13 and a clamping cantilever avoidance groove 12 extending from bottom to top are provided on the vertical side wall 11, for avoiding and accommodating the contact cantilever 21 and the first clamping cantilever 22 respectively, and an end avoidance groove for avoiding and accommodating the end of the horizontal section 20 is provided on the portion of the horizontal bottom wall 10 between the two vertical side walls 11, so that the inner end of the horizontal section can extend into it. Thus, when the contact is installed into the insulator from bottom to top, the first and second clamping cantilevers are clamped on the vertical side walls, and the ends of the horizontal sections are against the top walls of the end avoidance grooves to keep the contact portions of the contact cantilevers extending into the plug-in cavity.

[0005] Adapter connector such as Figure 1As shown, it includes an adapter insulator 90 and an adapter contact 91 installed in the adapter insulator. The adapter insulator is a long strip as a whole, and the cross section is a T-shaped structure including a horizontal top wall and a vertical middle wall. Two rows of adapter contacts are clamped in the adapter insulator and the contact sections are located on both sides of the vertical middle wall. The two sides of the horizontal top wall in the width direction are respectively provided with anti-mistake convex parts arranged at intervals in the length direction. When plugging, the vertical middle wall is inserted into the plug-in cavity, and the contact section of the adapter contact abuts against the contact cantilever to realize the conduction of the two connectors.

[0006] Then, after the two connectors are plugged in, the contact cantilever is subjected to outward pressure, causing the entire contact piece to have a tendency to twist. The twisting force on the contact piece is transmitted to the outer wall of the vertical side wall through the clamp tip, and at the same time transmitted to the top wall of the end avoidance groove through the end of the horizontal section. In this way, the contact piece will cause the vertical side wall to have a twist as a whole. Figure 1 As shown in the figure, the entire connector has a large length-width ratio, the vertical side wall is thin, and the horizontal bottom wall is even thinner. When the contact members in a row provide a deflection force to the vertical side wall at the same time, the vertical side wall will deform outward, and the notch will form an expanded structure, which cannot ensure the reliability of the two connectors being plugged in and connected. Utility Model Content

[0007] The utility model aims to provide a contact piece to solve the problem that in the plugged state of the existing printed circuit board connector, the force applied by the contact piece to the insulator causes the insulator to deform, thereby affecting the plugging and conducting reliability of the connector. At the same time, the utility model also aims to provide a printed circuit board connector using the contact piece to solve the problem that the plugging and conducting reliability of the existing printed circuit board connector is poor.

[0008] The contact piece of the utility model comprises a horizontal section and a contact cantilever and a first clamping cantilever on the horizontal section. The first clamping cantilever is located on the outer side of the contact cantilever. The side of the contact cantilever facing away from the first clamping cantilever has a contact portion. The first clamping cantilever has a first clamping protrusion on the edge of the side facing away from the contact cantilever for clamping with the vertical groove wall of the clamping cantilever avoidance groove on the insulator. The inner end of the horizontal section has an end clamping protrusion for clamping with the vertical groove wall of the end avoidance groove on the insulator.

[0009] Furthermore, the first latching protrusion and / or the end latching protrusion is a barb structure.

[0010] Furthermore, the contact cantilever and / or the first clamping cantilever is provided with a concave-convex matching structure on at least one side surface thereof for concave-convex matching with a corresponding groove wall on the insulator.

[0011] Furthermore, the concave-convex matching structure is a bulge structure on one surface.

[0012] The contact of the utility model is improved on the existing contact. A first clamping protrusion is set on the edge of the side of the first clamping cantilever facing away from the contact cantilever, and an end clamping protrusion is set on the inner end of the horizontal section. After the contact is installed in the insulator, the first clamping protrusion is clamped and matched with the vertical groove wall of the clamping cantilever avoidance groove on the insulator, and the end clamping protrusion is clamped and matched with the vertical groove wall of the end avoidance groove on the insulator. In this way, the contact and the insulator are relatively locked in the left and right directions in the width direction of the insulator. At the same time, when the contact is subjected to the outward pressing force of the adapter contact, the first clamping protrusion position and the end clamping protrusion position are respectively provided to the corresponding vertical groove wall in the up and down directions. The directions of the two forces will not cause the vertical side wall of the insulator to expand and deform outward, and the distance between the two forces is shortened, which will not cause a large torque and will not easily cause deformation of the insulator. In this way, the plug-in conduction reliability of the connector when in use is improved as a whole.

[0013] The utility model discloses a printed circuit board connector comprising an insulator and a contact piece installed in the insulator, wherein the contact piece comprises a horizontal section and a contact cantilever and a first clamping cantilever located on the horizontal section, wherein the first clamping cantilever is located on the outer side of the contact cantilever, and a contact portion is provided on a side of the contact cantilever facing away from the first clamping cantilever, wherein the first clamping cantilever is provided with a first clamping protrusion on an edge of a side facing away from the contact cantilever, wherein the first clamping protrusion is clamped and matched with a vertical groove wall of a clamping cantilever avoidance groove on the insulator, wherein an inner end of the horizontal section is provided with an end clamping protrusion, wherein the end clamping protrusion is clamped and matched with a vertical groove wall of the end avoidance groove on the insulator.

[0014] Furthermore, the first latching protrusion and / or the end latching protrusion is a barb structure.

[0015] Furthermore, the contact cantilever and / or the first clamping cantilever is provided with a concave-convex matching structure on at least one side surface thereof, which matches with the corresponding groove wall on the insulator.

[0016] Furthermore, the concave-convex matching structure is a bulge structure on one surface.

[0017] Furthermore, a first rounded transition structure is provided between the vertical groove wall and the horizontal groove bottom of the anti-error groove at the upper end of the vertical side wall of the insulator.

[0018] Furthermore, a second rounded corner transition structure is provided between the top wall of the end avoidance groove and the vertical groove wall.

[0019] The printed circuit board connector of the utility model is improved on the existing printed circuit board connector. By setting a first clamping protrusion on the edge of the side of the first clamping cantilever facing away from the contact cantilever, and setting an end clamping protrusion at the inner end of the horizontal section, after the contact piece is installed in the insulator, the first clamping protrusion is clamped and matched with the vertical groove wall of the clamping cantilever avoidance groove on the insulator, and the end clamping protrusion is clamped and matched with the vertical groove wall of the end avoidance groove on the insulator, so that the contact piece and the insulator are relatively locked in the left and right directions in the width direction of the insulator, and at the same time, when the contact piece is subjected to the outward pressing force of the matching contact piece, the first clamping protrusion position and the end clamping protrusion position are respectively provided to the corresponding vertical groove wall in the up and down directions, and the directions of the two forces will not cause the vertical side wall of the insulator to expand and deform outward, and the distance between the two forces is shortened, which will not cause a large torque and will not easily cause deformation of the insulator. In this way, the plug-in conduction reliability of the connector when in use is improved as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of an existing printed circuit board connector in a plug-in state with an adapter connector;

[0021] Figure 2 It is a structural schematic diagram of an embodiment of a contact piece of the utility model;

[0022] Figure 3 It is a structural schematic diagram of an insulator in one embodiment of a printed circuit board connector of the utility model;

[0023] Figure 4 The utility model is a cross-sectional view of an embodiment of the printed circuit board connector in a plug-in state with an adapter connector.

[0024] In the figure: 10, horizontal bottom wall; 11, vertical side wall; 110, first rounded corner transition structure; 12, card-mounted cantilever avoidance groove; 13, contact cantilever avoidance groove; 140, horizontal top wall; 141, vertical groove wall; 142, second rounded corner transition structure; 15, end plate; 2, contact piece; 20, horizontal section; 21, contact cantilever; 22, first card-mounted cantilever; 23, second card-mounted cantilever; 24, card tip; 25, first card protrusion; 26, bulge structure; 27, end card protrusion; 90, adapter insulator; 91, adapter contact piece. DETAILED DESCRIPTION

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] The printed circuit board connector of the utility model is mainly aimed at the existing printed circuit board connector, more precisely, it is aimed at the problem that when the printed circuit board connector introduced in the background technology is used, the contact piece exerts an outward force on the insulator, especially the vertical side wall of the insulator, causing the insulator to expand outward, thereby affecting the reliability of the plug-in connection between the printed circuit board connector and the adapter connector.

[0027] The printed circuit board connector of the utility model has further improved the structure of the contact piece, so that after being installed in the insulator, when it is subjected to the pressing force of the matching contact piece, the direction and position of the force transmitted to the insulator by the original contact piece change, thereby eliminating the tendency of the insulator to expand and deform outward. Specifically, Figure 2 The contact piece in the embodiment of the printed circuit board connector shown in the figure is an integrated sheet structure. The main sheet of the contact piece mainly includes a horizontal section 20 and three overhanging sections on the horizontal section 20. The three overhanging sections include a vertical direction from bottom to top (for the convenience of explanation, the "up and down" directions in the text are all based on the horizontal section 20). Figure 2 The upper and lower parts shown in the figure shall prevail and are not used as limitations on the upper and lower positions of the actual product) are the contact cantilever 21 inclined toward the plug-in cavity, and the first clamping cantilever 22 and the second clamping cantilever 23 are located on the outside of the contact cantilever 21 (closer to the outside of the insulator in the width direction of the insulator), and the edge of the contact cantilever 21 facing away from the first clamping cantilever 22 is provided with a contact portion for laterally pressing against the adapter contact 91. The contact piece of this embodiment is significantly improved over the contact piece of the prior art in that an end clamping protrusion 27 is provided on the edge of the inner end of the horizontal section 20, and a first clamping protrusion 25 is provided on the edge of the first clamping cantilever 22 facing away from the contact cantilever 21. Based on such a structure, after the contact piece is installed in the insulator, such as Figure 3-4 As shown, the first latching protrusion 25 is clipped with the vertical groove wall of the clip-mounted cantilever avoidance groove 12 on the insulator, and the end latching protrusion 27 is clipped with the vertical groove wall 141 of the end avoidance groove on the insulator. In this way, when the contact cantilever 21 of the connector and the adapter connector is subjected to the outward lateral pressure force and produces a twisting tendency, the force transmitted to the insulator mainly includes the downward force at the first latching protrusion 25 and the upward force at the end latching protrusion 27. Because the two forces act on the vertical wall surface of the insulator, it is not easy to cause the vertical side wall of the insulator to expand outward. Moreover, compared with the existing contact member applying forces to the insulator at the end of the horizontal section and the second clip-mounted cantilever, the distance between the two forces is shorter, and it is not easy to cause a large torque, and it is not easy to cause the vertical side wall of the insulator to expand and deform outward. Moreover, the force applied to the vertical side wall by the first clip-mounted cantilever is in the middle position in the width direction of the vertical side wall, which will not cause the vertical side wall to flip over.

[0028] Specifically, when the first clamping protrusion and the end clamping protrusion are provided, the clamping protrusion may be in the form of an arc-shaped protrusion or a Figure 2 The barb structure shown in the figure can be obtained by designing the shape of the punching tool when punching the main sheet body. The barb structure is adopted in this embodiment to better realize the clamping and fixing of the contact piece in the insulator.

[0029] Another embodiment of the printed circuit board connector of the utility model is based on the above embodiment and optimizes the design of the contact member therein. Figure 2 In the present embodiment, a first clamping cantilever 22 of the contact of the connector is provided with a concave-convex matching structure on at least one side thereof, which matches the corresponding groove wall of the clamping cantilever avoidance groove on the insulator. The concave-convex matching structure can realize the clamping fit between the first clamping cantilever and the insulator in a direction perpendicular to the first clamping convex. This not only makes the clamping between the contact and the insulator more reliable, but also the concave-convex matching can disperse the force transmitted by the contact to the vertical side wall to the vertical surface extending along the width direction, which is less likely to cause the vertical side wall to expand and deform outward.

[0030] Specifically, when setting the concave-convex matching structure, in order to reduce the manufacturing difficulty, the concave-convex matching structure is preferably set on a single surface of the first clamping cantilever, so that it can be directly formed when punching the contact piece. The concave-convex matching structure can be in various forms, such as a stamped bulge structure or a punched convex tip. Of course, the utility model does not exclude setting a pit on the first clamping cantilever and setting a protrusion at a corresponding position on the insulator. Similarly, in other embodiments, the concave-convex matching structure that matches the insulator can be set on the contact spring arm, or the concave-convex matching structure can be set on both the contact spring arm and the first clamping cantilever.

[0031] Another embodiment of the printed circuit board connector of the utility model optimizes the design of the insulator of the connector based on the above embodiment, and the main idea of ​​the preferred design is to improve the overall structural strength of the insulator. In this embodiment, the structure of the anti-mistake groove at the upper end of the vertical side wall of the original insulator is improved. Specifically, the vertical groove wall and the horizontal groove bottom of the original anti-mistake groove are at an obtuse angle. Figure 3 As shown, a first rounded transition structure 110 is provided between the vertical groove wall and the horizontal groove bottom of the error prevention groove, which not only improves the structural strength, but also facilitates the force distribution of the vertical side wall. In another embodiment, the end avoidance groove of the original insulator is improved, and specifically, the top wall and the vertical groove wall of the original end avoidance groove are at a right angle. Figure 3 As shown, there is a second rounded transition structure 142 between the top wall of the end avoidance groove and the vertical groove wall, which not only improves the structural strength but also avoids stress concentration.

[0032] Embodiment of the contact piece of the present invention: The specific structure of the contact piece is the same as the structure of the contact piece in the printed circuit board connector introduced above, and will not be described in detail herein.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A contact piece, comprising a horizontal section (20), a contact cantilever (21) and a first clamping cantilever (22) located on the horizontal section (20), the first clamping cantilever (22) being located outside the contact cantilever (21), and a side of the contact cantilever (21) facing away from the first clamping cantilever (22) having a contact portion, wherein: The first clamping cantilever (22) has a first clamping protrusion (25) on a side edge facing away from the contact cantilever (21) for clamping with a vertical groove wall (141) of a clamping cantilever avoidance groove (12) on the insulator, and the inner end of the horizontal section (20) has an end clamping protrusion (27) for clamping with a vertical groove wall (141) of an end avoidance groove on the insulator.

2. The contact piece according to claim 1, characterized in that: The first latching protrusion (25) and / or the end latching protrusion (27) are barbed structures.

3. The contact piece according to claim 1 or 2, characterized in that: The contact cantilever (21) and / or the first clamping cantilever (22) is provided with a concave-convex matching structure on at least one side surface thereof for matching concave-convexly with a corresponding groove wall on the insulator.

4. The contact piece according to claim 3, characterized in that: The concave-convex matching structure is a bulge structure (26) on the surface.

5. A printed circuit board connector, comprising an insulator and a contact member (2) mounted in the insulator, the contact member (2) comprising a horizontal section (20) and a contact cantilever (21) and a first clamping cantilever (22) located on the horizontal section (20), the first clamping cantilever (22) being located outside the contact cantilever (21), and the side of the contact cantilever (21) facing away from the first clamping cantilever (22) having a contact portion, wherein: The first clamping cantilever (22) has a first clamping protrusion (25) on a side edge facing away from the contact cantilever (21), the first clamping protrusion (25) being clamped and matched with a vertical groove wall (141) of the clamping cantilever avoidance groove (12) on the insulator, and the inner end of the horizontal section (20) has an end clamping protrusion (27), the end clamping protrusion (27) being clamped and matched with a vertical groove wall (141) of the end avoidance groove on the insulator.

6. The printed circuit board connector according to claim 5, characterized in that: The first latching protrusion (25) and / or the end latching protrusion (27) are barbed structures.

7. The printed circuit board connector according to claim 5 or 6, characterized in that: The contact cantilever (21) and / or the first clamping cantilever (22) is provided with a concave-convex matching structure on at least one side surface thereof, which matches the corresponding groove wall on the insulator.

8. The printed circuit board connector according to claim 7, characterized in that: The concave-convex matching structure is a bulge structure (26) on the surface.

9. The printed circuit board connector according to claim 5 or 6, characterized in that: A first rounded transition structure (110) is provided between the vertical groove wall (141) of the anti-error groove at the upper end of the vertical side wall (11) of the insulator and the horizontal groove bottom.

10. The printed circuit board connector according to claim 5 or 6, characterized in that: A second rounded corner transition structure (142) is provided between the top wall of the end avoidance groove and the vertical groove wall (141).

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