TWM649282U - Press fit terminal - Google Patents

Abstract

The invention discloses a fisheye terminal, which is inserted into a through hole of a circuit board and includes: an assembly part corresponding to the through hole, and the assembly part is provided with two side walls and a connecting part, and the two The side walls are arranged on the left and right sides of the assembly part, and the connecting part is arranged in the middle of the assembly part. The connecting part is connected to the two side walls. The side walls are provided with an outer side and an inner side. The outer side is arc-shaped, and the outer side closely fits an inner arc surface of the through hole. The top and bottom ends of the two side walls respectively form a first arc-shaped surface inward. The first arc-shaped surface One end of the surface extends inward to form a second arc-shaped surface, the connecting part is provided with two bending parts, the second arc-shaped surface connects the bending parts; an insertion part connects one end of the two side walls; and A fixed part connects the other ends of the two side walls. Therefore, the fisheye terminal of this invention can increase the contact area and reduce the insertion force.

Description

Fish eye terminal

The invention relates to a fisheye terminal, in particular to a fisheye terminal that increases the contact area and reduces the insertion force.

The fisheye terminal is a type of press-fit terminal. Its two elastic parts are squeezed and elastically contract, allowing the fisheye terminal to be smoothly inserted into the through hole of the circuit board, thereby achieving electrical connection between the fisheye terminal and the circuit board. Fisheye terminals are easy to assemble with circuit boards, do not require welding, are removable, and can match smaller conductive jacks on circuit boards, so they are widely used.

Chinese Patent Publication No. 209675515 discloses "a fisheye terminal", which includes an elastic part, an insertion end and a terminal respectively extending from both ends of the elastic part. The elastic part includes a pair of contacts formed by extending in an arc. arm, the outer surface of the contact arm is provided with a contact portion, the external structure of the contact portion includes a middle part and outer arc surfaces located on both sides of the middle part, the distance between the outer arc surface and the welding hole of the printed circuit board is Internal curved fit.

The fisheye terminal in the conventional technology only has an outer arc surface that fits the inner arc surface of the welding hole of the printed circuit board. The connection between the middle part and the welding hole will cause point contact and the contact area is insufficient, which affects the fisheye terminal. Eye terminal connection stability to the printed circuit board.

Therefore, it is necessary to provide a fisheye terminal with increased contact area and reduced insertion force.

The purpose of this invention is to provide a fisheye terminal, inserted into a through hole of a circuit board, including: an assembly part corresponding to the through hole, and the assembly part is provided with two side walls and a connecting part. The side walls are provided on the left and right sides of the assembly part, the connection part is provided in the middle of the assembly part, the connection part is connected to the two side walls, and the side walls are provided with an outer side and an inner side, The outer side is arc-shaped, and the outer side closely fits the inner arc surface of the through hole. The inner side is provided with a first arc surface and a second arc surface. The tops of the two side walls The first arc-shaped surface extends inwardly from the bottom end respectively to form the first arc-shaped surface. One end of the first arc-shaped surface extends inward to form the second arc-shaped surface. The connecting part is provided with two bending parts. Two arc-shaped surfaces are connected to the bending part; an insertion part is connected to one end of the two side walls; and a fixing part is connected to the other end of the two side walls.

Optionally, the first arc-shaped surface is a concave surface, and the second arc-shaped surface is a convex surface.

Optionally, when the assembly part fits with the through hole clearance, the top and bottom ends of the outer surface of the side wall respectively form a gap with the inner arc surface of the through hole, and the side wall The middle section of the outer side closely fits the inner arc surface of the through hole, the two bending portions are bent downward and deformed, and the angle between the bending portion of the side wall and the connecting portion is relatively small. Large, the angle between the two bending parts is relatively large.

Optionally, when the assembly part interferes with the through hole, the outer surface of the side wall closely fits the inner arc surface of the through hole, and the top and bottom of the outer surface of the side wall The end is extruded and deformed, the inner surface of the side wall is extruded and deformed, the two bending parts are bent downward and the angle between the side wall and the bending part of the connecting part is small, The angle between the two bending parts is small.

The purpose of this invention is to provide a fisheye terminal, inserted into a through hole of a circuit board, including: an assembly part corresponding to the through hole, and the assembly part is provided with two side walls and a connecting part. The side walls are provided on the left and right sides of the assembly part, the connection part is provided in the middle of the assembly part, the connection part is connected to the two side walls, and the connection part is provided with two bending parts, two bending parts. The connection point of the bending portion is provided with a recess formed by a downward depression, so that the thickness of the connection point between the two bending portions is smaller than the thickness of the bending portion; an insertion portion, the insertion portion connects the two said bending portions. One end of the side wall; and a fixing part, the fixing part connects the other ends of the two side walls.

100:Fisheye terminal

1:Assembly Department

11:Front face

12:Rear end face

13:Side wall

131:Outer side

132: Medial side

1321: First arc surface

1322:Second arc surface

14:Connection part

141: Bending part

15: Gap

16: Depression

17: included angle

2: Insertion part

3: Fixed part

200:Through hole

[The first picture] is a perspective view of the first embodiment of the fisheye terminal of this invention.

[The second figure] is a schematic diagram of the first embodiment of the fisheye terminal of this invention.

[The third picture] is a cross-sectional view of the fisheye terminal of this invention along the line III-III in the second picture.

[The fourth picture] is a cross-sectional view of the fisheye terminal of this invention after it is inserted into the through hole of the circuit board. At this time, the fisheye terminal and the through hole of the circuit board are excessively matched.

[The fifth picture] is a cross-sectional view of the fisheye terminal of this invention after it is inserted into the through hole of the circuit board. At this time, the fisheye terminal matches the clearance of the through hole of the circuit board.

[Figure 6] is a cross-sectional view of the fisheye terminal of this invention after it is inserted into the through hole of the circuit board. At this time, the fisheye terminal interferes with the through hole of the circuit board.

[Figure 7] is a perspective view of the second embodiment of the fisheye terminal of this invention.

[Figure 8] is a schematic diagram of the second embodiment of the fisheye terminal of this invention.

[Picture 9] is a cross-sectional view of the fisheye terminal of this invention along line IX-IX in Figure 8.

In order to explain in detail the technical content, structural features, objectives and effects of the fisheye terminal 100 of the present invention, examples are given below and explained in detail with reference to the drawings.

Please refer to the first to fourth figures, which are the first embodiment of the fisheye terminal 100 of the present invention. The fisheye terminal 100 of the present invention is inserted into a through hole 200 of a circuit board (not shown in the figure) to realize The fisheye terminal 100 of this invention is electrically connected to the circuit board. The fisheye terminal 100 of this invention is provided with an assembly part 1, an insertion part 2 and a fixing part 3. The front end of the assembly part 1 extends forward to form the insertion part 2 . The rear end of the assembly portion 1 extends backward to form the fixing portion 3 . The mounting part 1 corresponds to the through hole 200 of the circuit board.

The assembly part 1 is provided with a front end surface 11 , a rear end surface 12 , two side walls 13 and a connecting part 14 . The front end surface 11 and the rear end surface 12 are respectively provided at the front end and the rear end of the assembly part 1 , and the front end surface 11 is connected to the insertion part 2 . The rear end surface 12 is connected to the fixing part 3 . The two side walls 13 are provided on the left and right sides of the assembly part 1 . The connecting portion 14 is disposed in the middle of the assembly portion 1 , and is connected to the two side walls 13 . The side wall 13 has an outer side 131 and an inner side 132 . In this embodiment, the outer surface 131 of the side wall 13 is arc-shaped, and the inner surface 132 of the side wall 13 is an inclined surface. The arc-shaped outer surface 131 is used to increase the contact area with the through hole 200 and improve the connection stability. The inner side surfaces 132 gradually extend inwardly from the top and bottom ends of the two side walls 13 to form a slope. The connecting portion 14 is connected to the innermost portion of the two inner side surfaces 132 of the two side walls 13 . In this embodiment, the innermost portion of the two inner sides 132 of the two side walls 13 is the middle portion of the two inner sides 132 , that is, the connecting portion 14 is connected to both sides of the two side walls 13 . The middle part of the inner side 132 can reduce the width of the top and bottom ends of the two side walls 13 by forming a slope on the inner side 132 . The side walls 13 can be extruded and deformed according to the size of the through hole 200 . When the connecting portion 14 is inserted into the through hole 200, it will be squeezed and deformed. In this embodiment, the connecting portion 14 is provided with two Bend portion 141. The middle portions of the two inner surfaces 132 of the two side walls 13 extend inward and downward to form the two bending portions 141 , and the inner ends of the two bending portions 141 are connected to each other to form the connecting portion 14 .

The inner side 132 is provided with a first arc surface 1321 and a second arc surface 1322. The top and bottom ends of the two side walls 13 respectively extend inward to form the first arc surface 1321. The first arc surface 1321 is connected to the top and bottom ends of the side wall 13 . The first arc surface 1321 can reduce the width of the top and bottom ends of the two side walls 13 . One end of the first arc-shaped surface 1321 extends inward to form the second arc-shaped surface 1322. The second arc surface 1322 is connected to the outer end of the bent portion 141 . In this embodiment, the first arc-shaped surface 1321 is a concave surface, and the second arc-shaped surface 1322 is a convex surface.

Please refer to the fourth figure. When the fisheye terminal 100 of the present invention is over-fitted with the through hole 200, the outer surface 131 of the side wall 13 closely fits an inner arc surface of the through hole 200. The two bent portions 141 are squeezed and bent downward to deform.

Please refer to the fifth figure. When the fisheye terminal 100 of the present invention is matched with the through hole 200, the upper and lower ends of the outer surface 131 of the side wall 13 are in contact with the inner arc surface of the through hole 200. A gap 15 is formed. The middle section of the outer surface 131 of the side wall 13 closely fits the inner arc surface of the through hole 200 . The two bent portions 141 are squeezed and bent downward to deform. When the fisheye terminal 100 of the present invention fits with the through hole 200 with clearance, the angle 17 between the side wall 13 and the bent portion 141 of the connecting portion 14 is larger, and the two bent portions 141 The angle 17 between them is larger.

Please refer to the sixth figure. When the fisheye terminal 100 of the present invention interferes with the through hole 200, the outer surface 131 of the side wall 13 closely fits the inner arc surface of the through hole 200. The upper and lower ends of the outer surface 131 of the side wall 13 are squeezed and deformed. The inner surface 132 of the side wall 13 is squeezed and deformed. The two bent portions 141 are squeezed and bent downward to deform. When this creation fisheye terminal 100 When interfering with the through hole 200 , the included angle 17 between the side wall 13 and the bent portion 141 of the connecting portion 14 becomes smaller, and the included angle 17 between the two bent portions 141 becomes smaller.

Please refer to Figures 7 to 9, which are the second embodiment of the fisheye terminal 100 of the present invention. In this embodiment, a recessed portion 16 is formed by a downward depression in the middle of the upper surface of the connecting portion 14. . The recessed portion 16 is provided with a connection point between the two bending portions 141 . The recessed portion 16 makes the thickness of the inner ends of the two bent portions 141 smaller than the thickness of the outer ends of the two bent portions 141 . The recessed portion 16 can reduce the time required for the fisheye terminal 100 to be inserted into the through hole 200 . required strength.

In summary, the fisheye terminal 100 of the present invention is provided with an arc-shaped outer surface 131 and a beveled inner surface 132, so that the side wall 13 can be squeezed and deformed according to the size of the through hole 200. The recessed portion 16 is formed downwardly in the middle of the upper surface of the connecting portion 14 so that the thickness of the inner ends of the two bending portions 141 is smaller than the thickness of the outer ends of the two bending portions 141 to reduce the cost of the present invention. The force required for the fisheye terminal 100 to be inserted into the through hole 200 . Therefore, the fisheye terminal 100 of the invention has the function of increasing the contact area and reducing the insertion force.

131:Outer side

132: Medial side

14:Connection part

141: Bending part

16: Depression

Claims (5)

A fisheye terminal, inserted into a through hole of a circuit board, includes: an assembly part corresponding to the through hole, the assembly part is provided with two side walls and a connecting part, the two side walls are arranged on On the left and right sides of the assembly part, the connection part is arranged in the middle of the assembly part, and the connection part is connected to the two side walls. The side walls are provided with an outer side and an inner side, and the outer side is Arc shape, the outer side surface closely fits the inner arc surface of the through hole, the inner side surface is provided with a first arc surface and a second arc surface, and the top and bottom ends of the two side walls face respectively. The first arc-shaped surface extends inward to form the first arc-shaped surface, and one end of the first arc-shaped surface extends inward to form the second arc-shaped surface. The connecting part is provided with two bending parts, and the second arc-shaped surface is connected to The bending part; an insertion part, the insertion part connects one end of the two side walls; and a fixing part, the fixing part connects the other ends of the two side walls. The fisheye terminal according to claim 1, wherein the first arc-shaped surface is a concave surface, and the second arc-shaped surface is a convex surface. The fisheye terminal according to claim 1, wherein when the assembly part is matched with the clearance of the through hole, the top and bottom ends of the outer surface of the side wall are respectively in contact with the inner arc surface of the through hole. A gap is formed, the middle section of the outer surface of the side wall closely fits the inner arc surface of the through hole, the two bending parts are bent downward and deformed, and the connection between the side wall and the connecting part The angle between the bending parts is relatively large, and the angle between the two bending parts is relatively large. The fisheye terminal according to claim 1, wherein when the assembly portion interferes with the through hole, the outer surface of the side wall closely fits the inner arc surface of the through hole, and the outer surface of the side wall closely fits the inner arc surface of the through hole. The top and bottom ends of the outer side are extruded and deformed, the inner side of the side wall is extruded and deformed, the two bending portions are bent downwards, and the bending of the side wall and the connecting portion is The angle between the two bending parts is small, and the angle between the two bending parts is small. A fisheye terminal, inserted into a through hole of a circuit board, includes: an assembly part corresponding to the through hole, the assembly part is provided with two side walls and a connecting part, the two side walls are arranged on On the left and right sides of the assembly part, the connection part is arranged in the middle of the assembly part, and the connection part is connected to the two side walls. The connection part is provided with two bending parts, and the two bending parts The connection is provided with a recess formed by a downward depression, so that the thickness of the connection between the two bending parts is smaller than the thickness of the bending part; an insertion part, the insertion part connects one end of the two side walls; and A fixing part, the fixing part connects the other ends of the two side walls.

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