CN221057681U

CN221057681U - Fisheye terminal and circuit board connection structure

Info

Publication number: CN221057681U
Application number: CN202322680493.5U
Authority: CN
Inventors: 陈飞虎; 袁立德; 王军锋; 徐江
Original assignee: Shenzhen Heertai Automotive Electronic Technology Co ltd
Current assignee: Shenzhen Heertai Automotive Electronic Technology Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2024-05-31
Anticipated expiration: 2033-09-27

Abstract

The utility model relates to the technical field of connectors, in particular to a fisheye terminal and a circuit board connection structure. The fish eye terminal comprises a plug-in part, a connecting part and a male end contact pin which are sequentially connected, wherein the plug-in part is used for being clamped with a crimping hole of the PCB, and the male end contact pin is used for being connected with the female end connector; the inserting part comprises a pre-inserting section, an inserting section and a transition section which are connected in sequence; the width of the pre-inserted section in the direction from the pre-inserted section to the inserted section is gradually increased, and the inserted section is smoothly connected with the edge of the pre-inserted section; the width of changeover portion is greater than the crimping hole, and when fish-eye terminal and PCB board are connected, the central point of changeover portion and the central point position coincidence of PCB board. In the fisheye terminal of this embodiment, through setting up the pre-insert section, insert and the changeover portion cooperation, can be convenient for the fisheye terminal insert the crimping hole fast, can guarantee the joint strength and the electric connection performance of fisheye terminal and crimping hole simultaneously, simple structure, excellent in use effect.

Description

Fisheye terminal and circuit board connection structure

Technical Field

The utility model relates to the technical field of connectors, in particular to a fisheye terminal and a circuit board connection structure.

Background

In the field of circuit board processing, the scheme of connecting terminals in a traditional welding mode has the following problems: firstly, the high temperature in the welding process is easy to damage the precise electronic components; in addition, the welding process requires cleaning conductive substances such as flux residues, tin beads and the like, thereby increasing the production and maintenance costs.

Therefore, there is a need for an improvement to the above-described problems to change the current situation.

Disclosure of utility model

The utility model provides a fish-eye terminal and a circuit board connecting structure, which are used for solving the problems that electronic components are easy to damage at high temperature when a fixed end is fixed on a PCB board in a welding mode in the prior art, cleaning is required after welding, and production and maintenance cost is increased.

The utility model provides a fish-eye terminal which comprises a plug-in part, a connecting part and a male-end contact pin, wherein the plug-in part, the connecting part and the male-end contact pin are sequentially connected, the plug-in part is used for being clamped with a crimping hole of a PCB, and the male-end contact pin is used for being connected with a female-end connector;

The plug-in part comprises a pre-plug section, an insertion section and a transition section which are connected in sequence; the width of the pre-inserted section in the direction from the pre-inserted section to the inserted section is gradually increased, and the inserted section is smoothly connected with the edge of the pre-inserted section; the width of changeover portion is greater than the crimping hole, just the fisheye terminal with when the PCB board is connected, the center of changeover portion with the central point of PCB board puts the coincidence.

According to one embodiment of the utility model, an inner hole is formed in the inner side of the plug-in portion, and the plug-in portion is used for deforming towards the inner hole when the plug-in portion is connected with the PCB.

According to one embodiment of the utility model, when the fisheye terminal is connected with the PCB, the center position of the inner hole is positioned at one side of the center position of the PCB, which is close to the pre-insertion section.

According to one embodiment of the utility model, the inner hole is at least partially located in the press-fit hole when the plug-in portion is in contact with the PCB board.

According to one embodiment of the utility model, the edge of the plug-in part is provided with rounded corners, which are arranged along the edges of the pre-plug-in section, the plug-in section and the transition section.

According to one embodiment of the utility model, the plug part further comprises a holding force section and a strength section, the holding force section is connected to the transition section and the strength section, respectively, and one end of the strength section, which is far away from the holding force section, is connected to the connecting part; the rounded corners extend to the edges of the retention section.

According to one embodiment of the utility model, the radius of the outer side arc of the insertion section is 4mm and the radius of the outer side arc of the holding-force section is 2mm.

According to one embodiment of the utility model, the pre-insertion section is provided with a first chamfer and a second chamfer, the first chamfer is arranged on one side of the pre-insertion section, and the second chamfer is arranged on the side adjacent to the first chamfer.

According to one embodiment of the utility model, the pre-insertion section has a width smaller than the width of the crimp hole, and the insertion section has a width larger than the width of the crimp hole.

According to one embodiment of the utility model, the outer surface of the connecting part is provided with a positioning groove, and the connecting part is used for being fixedly connected with an external member.

The utility model also provides a circuit board connecting structure, which comprises:

The PCB is provided with a crimping hole; and

The fish-eye terminal according to any one of the above, wherein the fish-eye terminal is in plug-in fit with the crimp hole.

The embodiment of the utility model has the following beneficial effects:

When the fisheye terminal of the embodiment is used, the smoothly connected pre-insertion section and the smoothly connected insertion section are matched with the crimping hole, so that the fisheye terminal can be smoothly inserted into the crimping hole, and after the transition section moves into the crimping hole, the fisheye terminal can be pressed against the crimping hole under elastic acting force so as to be fixed in the crimping hole.

In the fisheye terminal of this embodiment, through setting up the pre-insert section, insert and the changeover portion cooperation, can be convenient for the fisheye terminal insert the crimping hole fast, can guarantee the joint strength and the electric connection performance of fisheye terminal and crimping hole simultaneously, simple structure, excellent in use effect.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic diagram of a circuit board connection structure in an embodiment of the utility model;

Fig. 2 is a schematic structural view of a fisheye terminal in an embodiment of the utility model;

FIG. 3 is a schematic diagram of a combination of fisheye terminals in an embodiment of the utility model;

Reference numerals:

1. A circuit board connection structure; 10. a fish-eye terminal; 100. a plug-in part; 110. pre-inserting sections; 111. a first chamfer; 112. a second chamfer; 120. an insertion section; 130. a transition section; 140. an inner bore; 150. round corners; 160. a retention force section; 170. an intensity segment; 200. a connection part; 210. a positioning groove; 300. a male end pin; 20. a PCB board; 21. and crimping the hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a circuit board connection structure 1, which includes a fisheye terminal 10 and a PCB 20, wherein the PCB 20 is provided with a press-connection hole 21; the fisheye terminal 10 is in plug-in fit with the crimp hole 21. Specifically, the fisheye terminal 10 includes a plugging portion 100, a connection portion 200, and a male pin 300, which are sequentially connected, wherein the plugging portion 100 is used for being clamped with the crimp hole 21 of the PCB 20, and the male pin 300 is used for being connected with the female connector; the plug-in portion 100 includes a pre-plug section 110, an insert section 120, and a transition section 130 connected in sequence; the width of the pre-insertion section 110 in the direction from the pre-insertion section 110 to the insertion section 120 is gradually increased, and the insertion section 120 is smoothly connected with the edge of the pre-insertion section 110; the width of the transition section 130 is larger than the press-connection hole 21, and when the fisheye terminal 10 is connected with the PCB 20, the center of the transition section 130 coincides with the center of the PCB 20.

When the fisheye terminal 10 of the embodiment is used, the fisheye terminal 10 can be smoothly inserted into the crimp hole 21 by providing the smoothly connected pre-insertion section 110 and the insertion section 120 to be matched with the crimp hole 21, and after the transition section 130 moves into the crimp hole 21, the fisheye terminal 10 can be pressed against the crimp hole 21 under elastic force to be fixed in the crimp hole 21.

In the fisheye terminal 10 of the embodiment, by setting the pre-insertion section 110, inserting and matching with the transition section 130, the fisheye terminal 10 can be conveniently and rapidly inserted into the crimping hole 21, and meanwhile, the connection strength and the electrical connection performance of the fisheye terminal 10 and the crimping hole 21 can be ensured, and the fisheye terminal has a simple structure and a good use effect.

Specifically, the inner side of the plugging portion 100 is provided with an inner hole 140, and when the plugging portion 100 is connected to the PCB board 20, the plugging portion 100 is configured to deform toward the inner hole 140.

Therefore, in the process that the plug-in part 100 is connected with the crimping hole 21, along with the contact between the insertion section 120 and the transition section 130 and the opening of the crimping hole 21, the plug-in part 100 can be extruded and deformed towards the direction of the inner hole 140, the inner hole 140 is formed in the plug-in part 100, the deformation range can be provided for the elastic deformation of the plug-in part 100, the elastic performance of the plug-in part 100 is assisted, and the transition section 130 can be pressed against the inner wall of the crimping hole 21 under the elastic action, so that the plug-in part 100 is fixedly connected with the PCB 20. Specifically, in the embodiment shown in fig. 3, the inner holes 140 may be uniformly distributed inside the plug portion 100 to ensure that the plug portion 100 has a uniform elastic deformation at each position, in some embodiments, the inner holes 140 may also be blind holes, and the openings of the inner holes 140 are located on one side surface of the plug portion 100, and may also provide the plug portion 100 with an elastic deformation.

Referring to fig. 2 and 3, in one embodiment, when the fisheye terminal 10 is connected to the PCB 20, the center position of the inner hole 140 is located at a side of the center position of the PCB 20 near the pre-insertion section 110.

In this embodiment, by setting the position of the inner hole 140 in the plugging portion 100, after the insertion section 120 is inserted into the crimp hole 21 and reaches the preset position, since the central position of the inner hole 140 is located at the position of the PCB board 20 where the central position faces the pre-insertion section 110, as shown in fig. 2, the elastic force exerted by the plugging portion 100 on the crimp hole 21 is located at the upper side of the central position of the PCB board 20, and under the action of the elastic potential energy of the plugging portion 100, the force of the contact point between the transition section 130 and the inner wall of the crimp hole 21 is inclined towards the lower side of the plugging portion 100, so that the force of the plugging portion 100 in the direction of extracting the crimp hole 21 can be offset, thereby improving the connection strength between the plugging portion 100 and the PCB board 20. It should be noted that, as shown in fig. 2, the preset position refers to that the center position of the transition section 130 coincides with the center position of the PCB 20, and at this time, the plugging portion 100 and the PCB 20 have the greatest elastic fixing force, so that the fixing stability is optimal. Referring specifically to FIG. 3, the spacing L1 between the center of the bore 140 and the center of the transition section 130 may be 0.3-0.4mm, preferably 0.35mm;

Specifically, when the plug portion 100 contacts the PCB 20, the inner hole 140 is at least partially located in the crimp hole 21.

Therefore, when the plug-in portion 100 is connected with the PCB 20, the plug-in portion 100 first interferes with the crimp hole 21 to generate an insertion force, and the inner hole 140 extends into the crimp hole 21 of the PCB 20, so that the plug-in portion 100 is elastically deformed, and the plug-in portion 100 can deform toward the inner hole 140, so that hard interference between the plug-in portion 100 and the PCB 20 is avoided, and the adverse phenomena of cracking of the plug-in portion 100 and breakage of the crimp hole 21 are avoided.

Further, the edges of the plug-in portion 100 are provided with rounded corners 150, the rounded corners 150 being provided along the edges of the pre-plug-in section 110, the plug-in section 120 and the transition section 130.

Through setting up fillet 150 at the edge of grafting portion 100, when grafting portion 100 inserts in crimping hole 21, the slip between the two can be guided to improve grafting portion 100's installation smoothness, simultaneously, through setting up fillet 150 at the edge of grafting portion 100, also can avoid grafting portion 100 to appear stress concentration, avoid grafting portion 100 to take place bad phenomenon such as damage, fisheye terminal 10's reliability also can be improved.

Specifically, the plug portion 100 further includes a retention section 160 and a strength section 170, where the retention section 160 is connected to the transition section 130 and the strength section 170, and an end of the strength section 170 remote from the retention section 160 is connected to the connection portion 200; the fillet 150 extends to the edge of the retention segment 160.

By providing the insertion section 120 and the holding force section 160 to cooperate, the insertion can be made smooth, and since the width of the insertion section 120 is the widest part of the insertion portion 100, the widest part of the fisheye terminal 10 can be positioned in the PCB board 20 after the fisheye terminal 10 is pressed into place in the press-connection hole 21, so that good connection strength between the fisheye terminal 10 and the PCB board 20 is ensured. During crimping of the fisheye terminal 10, after the holding force section 160 moves into the crimping hole 21, the interference amount between the fisheye terminal 10 and the PCB 20 gradually increases until the fisheye terminal 10 is pressed in place, and the holding force section 160 can provide holding force for connection between the fisheye terminal 10 and the PCB 20; because the width of the strength section 170 is greater than the width of the transition section 130, and the strength section 170 is located at the outer side of the crimping hole 21, the strength section 170 can ensure the strength of the fisheye terminal 10, and prevent the phenomena of buckling and the like when the fisheye terminal 10 is pressed in.

Referring to FIG. 3, in one embodiment, the radius R1 of the outer arc of the insertion section 120 is 4mm and the radius R2 of the outer arc of the retention section 160 is 2mm.

In the preferred embodiment, the distance between the center of the inner hole 140 and the center of the transition section 130 is 0.35±0.03mm, when the fisheye terminal 10 interferes with the PCB 20, the upper half of the inner hole 140 extends into the crimp hole 21 by about 0.46mm, accounting for about 30% of the thickness of the PCB 20, which is much higher than the conventional design, i.e. the moment arm is about 0.46mm, and the insertion force generated by the longer moment arm is smaller, the press-in is smoother, thereby avoiding the cracking of the fisheye terminal 10 and the breakage of the crimp hole 21 by using the lever principle; in addition, because the center of the inner hole 140 is higher than the center of the widest part of the fisheye terminal 10, a structure with the upper half part of the fisheye terminal 10 being narrow and the lower half part of the fisheye terminal 10 being wide is formed, when the fisheye terminal 10 is continuously pressed in to reach the holding force area, the insertion force is gradually increased to the peak value, the pressing in is completed, and meanwhile, a larger holding force can be obtained, so that the fisheye terminal 10 is prevented from falling off in the use process; the lower half material width structure can lead to the insertion force to be increased while obtaining larger holding force, so that the arc R1 of the insertion section 120 is designed to be 4mm, the arc R2 of the holding force section 160 is designed to be 2mm, so that the arcs of the insertion section 120 and the holding force section 160 are not vertically symmetrical and have a radius smaller than the arc of the insertion section 120, the material width can not be excessively controlled, and the problems of cracking of the fisheye terminal 10 and breakage of the crimping hole 21 caused by excessively large insertion force are avoided.

Further, referring to fig. 2, the pre-insertion section 110 is provided with a first chamfer 111 and a second chamfer 112, the first chamfer 111 is provided at one side of the pre-insertion section 110, and the second chamfer 112 is provided at the side adjacent to the first chamfer 111.

In a preferred embodiment, a first chamfer 111 is provided on two of the opposite sides of the pre-insertion section 110, and a second chamfer 112 is provided on the other two sides adjacent to the first chamfer 111, such that the pre-insertion section 110 has a first angle C1 and a second angle C2, the angles of C1 and C2 ranging from 30 DEG to 40 DEG, preferably 35 DEG to 37 DEG; with this arrangement, when the fisheye terminal 10 is pressed into the crimp hole 21, the insertion portion 100 can be ensured to smoothly enter the crimp hole 21, and the crimp efficiency of the fisheye terminal 10 can be improved. Meanwhile, the first chamfer 111 and the second chamfer 112 extend to the holding force section 160 through the fillets 150, so that the copper layer of the crimping hole 21 can be prevented from being scratched, the contact area between the fisheye terminal 10 and the crimping hole 21 is increased, and good electric signal transmission between the fisheye terminal 10 and the crimping hole 21 is ensured.

Specifically, the pre-insertion section 110 has a width smaller than the width of the crimp hole 21, and the insertion section 120 has a width larger than the width of the crimp hole 21.

With this arrangement, the pre-insertion section 110 can be easily pressed into the crimp hole 21 first, and then after the insertion section 120 enters the crimp hole 21, the fisheye terminal 10 can be moved to the transition section 130 to cooperate with the crimp hole 21 for guiding, so that the edge of the insertion section 100 is smooth, and crimping and assembling of the fisheye terminal 10 are facilitated.

In the preferred embodiment, the widest dimension of the fisheye terminal 10 is 1.19+ -0.03 mm, the thickness dimension is 0.6+ -0.02 mm, the aperture of the crimp hole 21 is phi 1.05 (-0.04- +0.05) mm, the thickness dimension is 1.6+ -0.16 mm, the center of the crimp hole 21 is 0.35+ -0.03 mm higher than the center of the widest part of the fisheye terminal 10, the upper half of the fisheye terminal 10 is narrow in material and the lower half is wide in material, the circular arc of the holding force section 160 is not vertically symmetrical with the circular arc of the insertion section 120, and the radius is smaller than the circular arc of the insertion section 120.

In one embodiment, the outer surface of the connecting portion 200 is provided with a positioning groove 210, and the connecting portion 200 is used for fixedly connecting with an external member.

Thus, the fisheye terminal 10 can be fixedly connected with an external member through the connection part 200, for example, the connection part 200 can be embedded into the connector in the injection molding process, and the connection part is matched with the connector through the positioning groove 210 so as to improve the connection strength between the fisheye terminal 10 and the connector.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The fish eye terminal is characterized by comprising a plug-in part, a connecting part and a male end contact pin which are sequentially connected, wherein the plug-in part is used for being clamped with a crimping hole of a PCB, and the male end contact pin is used for being connected with a female end connector;

2. The fish-eye terminal of claim 1, wherein an inner hole is provided on an inner side of the plugging portion, and the plugging portion is configured to deform toward the inner hole when the plugging portion is connected to the PCB.

3. The fish-eye terminal of claim 2, wherein the center position of the inner hole is located on a side of the center position of the PCB that is adjacent to the pre-insertion section when the fish-eye terminal is connected to the PCB.

4. The fisheye terminal of claim 2, wherein the internal bore is at least partially located within the crimp aperture when the socket is in contact with the PCB.

5. The fish-eye terminal of claim 1, wherein the edge of the mating portion is provided with a rounded corner disposed along the edges of the pre-mating section, the insertion section, and the transition section.

6. The fish-eye terminal of claim 5, wherein the plug portion further comprises a retention section and a strength section, the retention section being connected to the transition section and the strength section, respectively, the strength section being connected to the connection at an end thereof remote from the retention section; the rounded corners extend to the edges of the retention section.

7. The fish-eye terminal of claim 6, wherein the radius of the outer side arc of the insertion section is 4mm and the radius of the outer side arc of the retention section is 2mm.

8. The fish-eye terminal of claim 1, wherein the pre-insertion section is provided with a first chamfer and a second chamfer, the first chamfer being provided on one side of the pre-insertion section, the second chamfer being provided on a side adjacent to the first chamfer;

And/or the width of the pre-insertion section is smaller than the width of the crimping hole, and the width of the insertion section is larger than the width of the crimping hole.

9. The fish-eye terminal of claim 1, wherein the outer surface of the connecting portion is provided with a positioning groove, and the connecting portion is for fixedly connecting with an external member.

10. A circuit board connection structure, comprising:

The PCB is provided with a crimping hole; and

The fisheye terminal of any one of claims 1-9, wherein the fisheye terminal is in mating engagement with the crimp aperture.