CN216563612U - Plug-in terminal of power module - Google Patents

Abstract

The utility model discloses a plug terminal of a power module. The plug terminal of the power module comprises a plug part, a transition part, a buffering part and a base which are sequentially arranged from top to bottom, wherein the buffering part comprises a buffering structure and a limiting structure which are arranged at intervals; the buffer structure is connected between the base and the transition part and stretches along the length direction of the plug terminal; the first end of the limiting structure is fixed on the base, and the second end of the limiting structure extends towards the transition part; the height of the limiting structure is smaller than that of the buffer structure, wherein the longitudinal axis is the central line of the plug part along the length direction of the plug terminal; the cushioning structure is asymmetric about the longitudinal axis direction. According to the plug terminal of the power module, the installation operation process is simplified, the automation degree is improved, the impact resistance of the plug terminal is improved, the service life is prolonged, and the reliability is improved.

Description

Plug-in terminal of power module

Technical Field

The utility model relates to the technical field of semiconductor power devices, in particular to a plug-in terminal of a power module.

Background

In the prior art, the signal terminals of the commonly used power modules mostly adopt the structure of a split type needle cylinder and a contact pin. The existing split type needle cylinder and inserting needle structure has the following defects:

(1) the split signal terminal structure requires two processes of needle cylinder welding and pin inserting, and two processes are required for manufacturing and assembling, so that the cost is high, the production automation degree is low, and the efficiency is low;

(2) the welding area of the needle cylinder of the split signal terminal is small, and the coating amount of welding flux at the welding joint is small, so that the welding strength of the bottom of the needle cylinder is insufficient;

(3) the needle cylinder is of a rigid structure, so that in the testing and practical application processes, external stress borne by the contact pin is easily transmitted to a welding interface of the needle cylinder and a DBC (Direct Bonding Copper) board, and the welding interface of the needle cylinder and the DBC board is broken;

(4) the needle cylinder is connected with the contact pin in an interference fit mode, and under the action of periodic stress, looseness easily appears in connection of the contact pin and the needle cylinder, so that the stability of electrical connection is influenced.

Therefore, a new jack terminal for a power module is desired that overcomes the above-mentioned problems.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a power module socket terminal, which simplifies the mounting operation process, improves the degree of automation, improves the impact resistance of the socket terminal, prolongs the service life, and improves the reliability.

According to one aspect of the utility model, the plug terminal of the power module comprises a plug part, a transition part, a buffering part and a base which are sequentially arranged from top to bottom, wherein the buffering part comprises a buffering structure and a limiting structure which are arranged at intervals; the buffer structure is connected between the base and the transition part and stretches along the length direction of the plug terminal; the first end of the limiting structure is fixed on the base, and the second end of the limiting structure extends towards the transition part; the height of the limiting structure is smaller than that of the buffering structure, the buffering structure is asymmetric about a longitudinal axis direction, and the longitudinal axis is a central line of the plug part along the length direction of the plug terminal.

Preferably, the buffer part comprises two buffer structures and one limiting structure; the two buffer structures are respectively positioned at two sides of the limiting structure.

Preferably, two of said cushioning structures are asymmetric about said longitudinal axis; the bending directions of the two buffer structures are opposite.

Preferably, the buffer structure at least comprises a first arc-shaped section and a second arc-shaped section, and the cross section of the buffer structure is wavy; the first arc-shaped section is connected with the transition part, and the second arc-shaped section is connected with the base.

Preferably, the bending angle of the first arc-shaped section is 40-80 degrees.

Preferably, a transverse gap is arranged between the buffer structure and the limiting structure.

Preferably, the width of the transverse gap is 0.2mm to 0.7 mm.

Preferably, a longitudinal gap is formed between the limiting structure and the transition part.

Preferably, the buffer portion comprises at least two of the buffer structures; different ones of the cushioning structures are disposed at different positions relative to the spacing structure.

Preferably, the plug part includes a plugging part guiding the plugging terminal to be inserted into the PCB; the arc stopping structure and the through hole enclosed by the arc stopping structure.

Preferably, the base is a bent base; the base of buckling includes: a connection part connected with the buffer part; and the bending part and the buffer part form an included angle.

Preferably, the base is a double-side bent base; the double-side bending base comprises a connecting part which is connected with the buffer part; the first bending part is connected with the connecting part and forms a first included angle with the buffer part; and the second bending part is connected with the connecting part and forms a second included angle with the buffer part, wherein the first bending part and the second bending part are opposite in direction.

Preferably, the thickness of the first bending part is the same as that of the connecting part; the thickness of the second bending part is the same as that of the connecting part.

Preferably, the thickness of the first bending part is half of the thickness of the connecting part; the thickness of the second bending part is half of the thickness of the connecting part.

Preferably, the base is provided with one or a combination of a plurality of rectangular grooves, arc-shaped grooves and open holes.

Preferably, the plug terminal is of an integrally molded structure.

According to the plug-in terminal of the power module, the buffer part between the base and the transition part comprises the buffer structure and the limiting structure, the buffer structure can provide longitudinal elastic support, can buffer longitudinal stress, can bear certain longitudinal stress while ensuring rigidity, and also can release the longitudinal stress for the bottom; the deformation of buffer structure can be controlled to the longitudinal clearance between limit structure and the transition portion, and when plug terminal received great longitudinal impact force, limit structure can support transition portion, and control buffer structure's deformation makes it be unlikely to warp too big, improves shock resistance, improves the reliability.

Further, have horizontal clearance between buffer structure and limit structure, guarantee buffer structure and limit structure in longitudinal movement process, can not take place mutual friction to reduce the wearing and tearing that the two received, further increase life.

Furthermore, the base adopts multiple structural design, can guarantee great bottom contact surface, reduces the stress to bottom base plate (DBC board), can guarantee good welding strength and good soldering tin and climb the cover nature moreover.

Furthermore, the plug-in terminal adopts integrated structural design shaping, has avoided the integrated configuration to connect because of mechanical interference fit to appear not hard up, improves electrical connection's stability, simplifies the installation operation process, promotes automation efficiency.

Further, the plug terminal is asymmetrical with respect to a longitudinal axis direction, wherein the longitudinal axis is a center line of the plug portion along a length direction of the plug terminal. Due to the fact that the bending directions of the buffer structures are different, when the plug terminal is stressed, the stress can be released from two opposite directions in a segmented mode, the stability and the shock resistance of the plug terminal are improved, and the reliability of the plug terminal is guaranteed.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 shows a schematic structural view of a split jack terminal according to the prior art;

fig. 2 shows a perspective view of a plug terminal according to a first embodiment of the utility model;

fig. 3 shows a front view of a plug terminal according to a first embodiment of the utility model;

fig. 4 shows a left side view of a jack terminal according to a first embodiment of the present invention;

fig. 5 a-5 c respectively show a schematic structural diagram of a base in a jack terminal according to an embodiment of the present invention;

fig. 6 shows a schematic structural view of a base in a jack terminal according to an embodiment of the present invention;

fig. 7 shows a schematic structural diagram of a base in a jack terminal according to an embodiment of the present invention.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. In the following description, numerous specific details of the utility model, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the utility model. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.

It will be understood that when a layer or region is referred to as being "on" or "over" another layer or region in describing the structure of the element, it can be directly on the other layer or region or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

In the use process of the existing split type signal terminal, a plurality of problems exist. Fig. 1 shows a schematic structural view of a split type jack terminal according to the prior art. As shown in fig. 1, the conventional split signal terminal is a pin barrel and pin barrel structure, and includes a pin 100 and a pin barrel 200. The pin 100 and barrel 200 are susceptible to loosening from the mechanical interference fit connection, resulting in an unstable electrical connection. In addition, the existing split signal terminal also has the problems of complex process, high cost, easy damage and the like.

Fig. 2 shows a perspective view of a plug terminal according to a first embodiment of the utility model; fig. 3 shows a front view of a plug terminal according to a first embodiment of the utility model; a left side view of the jack terminal according to the first embodiment of the present invention is shown in fig. 4. As shown in fig. 2-4, the plug terminal of the power module includes a plug portion 1, a transition portion 2, a buffer portion and a base 5, which are sequentially disposed from top to bottom.

The plug portion 1 includes a plugging portion 11, a through hole 12, and an arc stop structure 13. The inserting and extracting portion 11 guides the insertion of the inserting and extracting terminal into the PCB board. The through hole 12 is enclosed by the arc stopping structures 13 at two sides, the arc stopping structures 13 and the through hole 12 form a fisheye structure (oval shape), the middle part is wide, and the plug part 1 is inserted into the PCB and then forms effective mechanical and electrical connection with the PCB. Of course, the shape of the through-hole 12 may be other shapes.

The buffer part comprises a buffer structure 3 and a limiting structure 4 which are arranged at intervals. Buffer structure 3 is connected between base 5 and transition portion 2, and buffer structure 3's first end is connected with transition portion 2 promptly, and buffer structure 3's second end is connected with base 5 to buffer structure 3 stretches out and draws back along plug terminal's length direction. The first end of limit structure 4 is fixed on base 5, and the second end of limit structure 4 extends towards transition portion 2 to with have certain clearance between transition portion 2. The height of the limiting structure 4 is smaller than that of the buffer structure 3.

In the present embodiment, a lateral gap 6 is provided between the cushioning structure 3 and the spacing structure 4. Preferably, the width of the transverse gap 6 between the buffer structure 3 and the limit structure 4 is 0.2 mm-0.7 mm, and within the range, the use effect is better. The height that limit structure 4 extends along the length direction of bayonet terminal is less than the height of buffer structure 3, and limit structure 4's first end is connected with base 5 promptly, and the second end extends and has set up and transition portion 2 between longitudinal gap 7 to transition portion 2.

The cushioning structure 3 comprises at least a first arcuate section 31 and a second arcuate section 32. The cross-section of the buffer structure 3 is wave-shaped (or S-shaped including two arc-shaped segments). The first arc-shaped section 31 is connected to the transition 2 and the second arc-shaped section 32 is connected to the base 5. Preferably, the bending angle (central angle) of the first arc-shaped section 31 is 40-80 degrees, so that the plug terminal can have strong yield resistance. Furthermore, when the bending angle of the first arc-shaped section 31 is 70 degrees to 75 degrees, the buffer capacity of the plug terminal is stronger, the yield resistance is stronger, the plugging performance is good, and the service life can be greatly prolonged.

Optionally, the cushioning structure 3 comprises a plurality of arcuate segments, the cross-section of which is wave-like, for example serpentine-shaped. Specifically, the arc-shaped sections may be three, four or more, and the transition portion 2, the buffer structure 3 composed of a plurality of arc-shaped sections and the base 5 are connected in sequence. Increasing the number of arc segments increases the ability of the cushioning structure 3 to withstand longitudinal stresses.

In this embodiment, the number of the buffer structures 3 and the number of the limiting structures 4 may be arbitrarily limited, and are not limited to the numbers in the embodiment of the present invention. In the present embodiment, the buffering portion includes two buffering structures and one limiting structure as an example, but the buffering portion is not limited to this, and for example, the buffering portion may include three buffering structures 3 and two limiting structures 4, and the buffering structures 3 and the limiting structures 4 are alternately arranged.

Referring to fig. 3, the buffer structure 3 includes a first buffer structure 301 and a second buffer structure 302 respectively located at two sides of the limiting structure 4. And transverse gaps 6 are respectively arranged between the first buffer structure 301 and the second buffer structure 302 and the limiting structure 4. A longitudinal gap 7 is arranged between the limiting structure 4 and the transition part. The limiting structure 4 is located on a longitudinal axis of the plug portion 1, wherein the longitudinal axis is a central line of the plug portion along the length direction of the plug terminal; the first buffer structure 301 and the second buffer structure 302 are asymmetrical with respect to the longitudinal axis direction.

The limiting structure 4 may be a columnar structure or other shapes as described above. The buffer structure 3 may be in the shape described above, such as an S-shape, or may be in other shapes. In the present embodiment, the two buffer structures 3 may be identical or different. For example, the two buffer structures 3 have different shapes, or the number of arc-shaped segments is different, or the radian of the arc-shaped segments is different, etc. The two buffer structures 3 may be symmetrical or asymmetrical with respect to the longitudinal axis of the plug portion 1, for example, the asymmetry may be achieved by the opposite bending directions of the buffer structures 3 on the left and right sides, or the asymmetry may be achieved by the different numbers of arc-shaped segments or the different radians.

The base 5 is a bending base which comprises a connecting part and a bending part, wherein the connecting part is connected with the buffering part, and the bending part and the buffering part form an included angle.

In a preferred embodiment, the base 5 is further provided with one or a combination of rectangular slots 81, arc slots 82 and openings 83 (see fig. 5 a-5 c). The number of rectangular slots 81, arcuate slots 82, and apertures 83 may be 1, 2, or more. The rectangular groove 81 or the arc-shaped groove 82 is arranged, so that the welding surface can be increased, and the welding strength is improved; the open hole 83 is arranged, so that the creeping performance of the solder can be enhanced, and the welding strength is improved. The rectangular slot 81, the arc-shaped slot 82 and the opening 83 can be arranged at any position of the base 5; the arrangement of the rectangular slot 81, the arc-shaped slot 82 and the opening 83 can be combined arbitrarily.

In a preferred embodiment, the base and the buffer part are of an integral structure; the bending part is bent by the buffer part in the vertical direction.

In a preferred embodiment, the base may also be a double-sided bent base (see fig. 6 and 7). The double-side bending base comprises a connecting part, a first bending part and a second bending part. The connecting part is connected with the buffer part; the first bending part is connected with the connecting part and forms a first included angle with the buffer part; the second bending part is connected with the connecting part and forms a second included angle with the buffering part. Wherein, the first kink and the second kink are opposite in orientation.

Referring to fig. 6, the thickness of the first bending part is half of the thickness of the connection part; the thickness of the second bending part is half of the thickness of the connecting part. Optionally, a sum of the thickness of the first bent portion and the thickness of the second bent portion is equal to the thickness of the connection portion.

Referring to fig. 7, the thickness of the first bending part is the same as that of the connection part; the thickness of the second bending part is the same as that of the connecting part.

Furthermore, the plug-in terminal is designed and molded in an integrated structure, the buffer structure 3 provides longitudinal elastic support, can buffer longitudinal stress, can bear certain longitudinal stress while ensuring the rigidity, and also releases the longitudinal stress for the bottom; when the plug terminal body is subjected to a large longitudinal impact force, the limiting structure 4 can abut against the transition part 2, so that the buffer structure 3 is prevented from being deformed too much, the impact resistance of the plug terminal is improved, the service life is prolonged, and the reliability is improved; the transverse gap 6 arranged between the buffer structure 3 and the limiting structure 4 can ensure that the buffer structure 3 and the limiting structure 4 do not rub against each other in the longitudinal movement, thereby reducing the abrasion of the buffer structure and the limiting structure and further prolonging the service life of the plug terminal.

According to the plug-in terminal of the power module provided by the embodiment of the utility model, the buffer part between the base and the transition part comprises the buffer structure and the limiting structure, the buffer structure can provide longitudinal elastic support, can buffer longitudinal stress, can bear certain longitudinal stress while ensuring the rigidity, and also can release the longitudinal stress for the bottom; the deformation of buffer structure can be controlled to the longitudinal clearance between limit structure and the transition portion, and when plug terminal received great longitudinal impact force, limit structure can support transition portion, and control buffer structure's deformation makes it be unlikely to warp too big, improves shock resistance, improves the reliability.

Further, have horizontal clearance between buffer structure and limit structure, guarantee buffer structure and limit structure in longitudinal movement process, can not take place mutual friction to reduce the wearing and tearing that the two received, further increase life.

Furthermore, the base adopts a bent base design, so that a large bottom contact surface can be ensured, the stress on a bottom substrate (DBC plate) is reduced, and good welding strength and good soldering tin climbing performance can be ensured.

Furthermore, the plug-in terminal is formed by adopting an integrated structural design, so that looseness of a combined structure due to mechanical interference fit connection is avoided, the stability of electrical connection is improved, the installation operation procedure is simplified, and the automation efficiency is improved.

The plug terminal can ensure that the plug part of the plug terminal can be deformed in a yielding way when the PCB is pressed into the plug terminal, and bear most of the pressing stress; in the use process of the plug terminal, the bending part of the buffer structure of the buffer part can reduce mechanical stress and thermal stress through deformation, and the limit structure of the buffer part can ensure that the buffer structure does not generate excessive deformation when the plug terminal is impacted by large stress, so that the collapse of the plug terminal is avoided. The plug terminal provided by the utility model comprises the design points, but not limited to the design points, can simplify the operation process, enhance the reliability and prolong the service life of the plug terminal.

Further, the plug terminal is asymmetrical with respect to a longitudinal axis direction, wherein the longitudinal axis is a center line of the plug portion along a length direction of the plug terminal. Due to the fact that the bending directions of the buffer structures are different, when the plug terminal is stressed, the stress can be released from two opposite directions in a segmented mode, the stability and the shock resistance of the plug terminal are improved, and the reliability of the plug terminal is guaranteed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While embodiments in accordance with the utility model have been described above, these embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model and various embodiments with various modifications as are suited to the particular use contemplated. The utility model is limited only by the claims and their full scope and equivalents.

Claims (13)

1. A plug terminal of a power module is characterized by comprising a plug part, a transition part, a buffer part and a base which are arranged in sequence from top to bottom,

the buffer part comprises buffer structures and limit structures which are arranged at intervals;

the buffer structure is connected between the base and the transition part and stretches along the length direction of the plug terminal;

the first end of the limiting structure is fixed on the base, and the second end of the limiting structure extends towards the transition part;

the height of the limiting structure is smaller than that of the buffer structure,

the buffer structure is asymmetric with respect to a longitudinal axis direction, wherein the longitudinal axis is a center line of the plug part along a length direction of the plug terminal.

2. The connector terminal of claim 1, wherein the buffer portion includes two of the buffer structures and one of the limiting structures; the two buffer structures are respectively positioned at two sides of the limiting structure.

3. The jack terminal of claim 2, wherein two of said buffer structures are asymmetrical about the longitudinal axis; the bending directions of the two buffer structures are opposite.

4. The power module's jack terminal of claim 1, wherein said buffer structure comprises at least a first arcuate segment and a second arcuate segment, said buffer structure having a wave-shaped cross-section;

the first arc-shaped section is connected with the transition part, and the second arc-shaped section is connected with the base.

5. The jack terminal of claim 4, wherein the bending angle of the first arc-shaped section is 40 ° to 80 °.

6. The power module's jack terminal of claim 1, wherein a lateral gap is provided between the buffer structure and the limiting structure.

7. The patch terminal of claim 6, wherein the width of the transverse gap is 0.2mm to 0.7 mm.

8. The patch terminal of claim 1, wherein a longitudinal gap is provided between the retention structure and the transition portion.

9. The jack terminal of claim 1, wherein the buffer portion includes at least two of the buffer structures; different ones of the cushioning structures are disposed at different positions relative to the spacing structure.

10. The jack terminal of a power module according to claim 1, wherein the plug portion comprises:

the plugging part guides the plugging terminal to be plugged into the PCB;

the arc stopping structure and the through hole enclosed by the arc stopping structure.

11. The connector terminal of claim 1, wherein the base is a bent base; the base of buckling includes:

a connection part connected with the buffer part; and

the bending part and the buffer part form an included angle.

12. The power module jack terminal of claim 1, wherein the base has one or more of a rectangular slot, an arc slot, and an opening.

13. The connector terminal of any one of claims 1-12, wherein the connector terminal is a one-piece molded structure.

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