CN103068158B - Golden finger structure and power source module with the same - Google Patents

Abstract

The embodiment of the present invention discloses a gold finger structure and a power module with the gold finger structure, which are used to avoid breakdown and short circuit between adjacent gold fingers caused by ignition and arcing of the gold fingers during hot swapping. The embodiment of the present invention includes: at least two adjacent gold fingers, the distance between the front ends of the two adjacent gold fingers in the insertion direction is greater than the distance between the rear ends in the insertion direction, and the two adjacent gold fingers The distance between the front ends in the finger insertion direction is at least greater than the arc extinguishing distance.

Description

A gold finger structure and a power module with the gold finger structure

technical field

The invention relates to the technical field of gold fingers, in particular to a gold finger structure and a power module having the gold finger structure.

Background technique

The connecting finger refers to the connecting part between the memory stick and the memory slot, and all signals are transmitted through the connecting finger. Gold fingers are composed of many golden-yellow conductive contacts. Because the surface is gold-plated and the conductive contacts are arranged like fingers, they are called "gold fingers".

At present, due to the limited size and space of power modules with high power and high power density, their input and output connections are usually connected by golden fingers. However, since the distance between each gold finger is limited by the distance between the matching connecting terminal reeds and the size space of the module, the distance between two adjacent gold fingers is not large.

During hot plugging, there will be sparking and arcing between the gold fingers and the connecting terminals. Since the distance between two adjacent gold fingers is not large, the sparking and arcing may break through the air between the gold fingers and discharge, resulting in a short circuit. A short circuit may cause damage to the device or affect its operation.

Contents of the invention

Embodiments of the present invention provide a gold finger structure and a power module having the gold finger structure, which are used to avoid breakdown and short circuit between adjacent gold fingers caused by ignition and arcing of the gold fingers during hot swapping.

In view of this, a golden finger structure provided by an embodiment of the present invention may include:

For at least two adjacent gold fingers, the distance between the front ends of the two adjacent gold fingers in the insertion direction is greater than the distance between the rear ends in the insertion direction, and the two adjacent gold fingers are inserted into The distance between the front ends of the directions is at least greater than the arc extinguishing distance.

In a first possible implementation manner, the front ends of the two adjacent gold fingers in the insertion direction are provided with cutaway corners, and the cutaway corners on the two adjacent golden fingers are oppositely arranged; or, the The front end of one of the two adjacent gold fingers in the insertion direction is provided with a missing corner.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the notch is L-shaped or arc-shaped or stepped.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner, the golden finger structure is used for input and output connections of the power module.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a fourth possible implementation manner, the distance between the front ends of the two adjacent golden fingers in the insertion direction is 6 mm.

A second aspect of the present invention provides a power module, the power module comprising the golden finger structure according to any one of claims 1-6.

In a first possible implementation manner, the power supply module is a primary power supply module, an AC/DC power supply module.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, the power module further includes a connecting terminal reed matched with the golden finger structure, the The connecting terminal reed is in contact with the rear end of the golden finger in the insertion direction.

It can be seen from the above technical solutions that, compared with the traditional gold finger used for input and output connections, the gold finger structure and the power module with the gold finger structure provided by the embodiment of the present invention, because the traditional adjacent gold finger The distance between the front ends of the fingers in the insertion direction is not large, and arcing may break through the air between the gold fingers and discharge, resulting in a short circuit. Therefore, by only increasing the distance between the front ends of the adjacent gold fingers The distance required for arc extinguishing can avoid the phenomenon of breakdown and short circuit between adjacent gold fingers caused by ignition and arcing at the front end of the gold fingers during hot swapping; and because the overall spacing of the gold fingers does not change, it is beneficial to The miniaturization of the gold finger ensures the flow capacity of the gold finger.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that are required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a golden finger structure provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a gold finger structure in a power module provided by an embodiment of the present invention;

Fig. 3 is another schematic diagram of the golden finger structure in the power module provided by the embodiment of the present invention;

Fig. 4 is another schematic diagram of the golden finger structure in the power module provided by the embodiment of the present invention;

Fig. 5 is another schematic diagram of the golden finger structure in the power module provided by the embodiment of the present invention;

FIG. 6 is a schematic diagram of the design dimensions of the golden finger structure provided by the embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a gold finger structure and a power module having the gold finger structure, which are used to avoid breakdown and short circuit between adjacent gold fingers caused by ignition and arcing of the gold fingers during hot swapping.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Each will be described in detail below.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a gold finger structure provided by an embodiment of the present invention, wherein the gold finger structure includes:

For at least two adjacent gold fingers, the distance between the front ends of the two adjacent gold fingers in the insertion direction is greater than the distance between the rear ends in the insertion direction, and the two adjacent gold fingers are inserted into The distance between the front ends of the directions is at least greater than the arc extinguishing distance.

It can be understood that, in the embodiment of the present invention, the arc extinguishing distance refers to the distance between adjacent gold fingers that will not be punctured by an arc, or that the arc can be automatically extinguished when the AC voltage crosses zero after breakdown. , the distance depends on the operating voltage and current between adjacent gold fingers when the gold fingers are disconnected or connected. The arc extinguishing distance may have different values in different practical application scenarios, but at this distance or greater than this distance, arc extinguishing between components can be guaranteed, and no specific limitation is made here. For example, in the case of a general single-phase AC grid input, the arc extinguishing between the live wire (Live Wire) gold finger (which can be called the gold finger L terminal) and the neutral wire (Neutral wire) gold finger (which can be called the gold finger N terminal) The distance may be 6mm.

It can be understood that, as shown in FIG. 1, the direction indicated by the thick arrow can be considered as the direction of gold finger insertion, wherein, the front end of two adjacent gold fingers in the insertion direction is narrower than the rear end of the gold finger insertion direction, so The distance B between the front ends in the insertion direction of the gold fingers is greater than the distance b between the rear ends in the insertion direction of the gold fingers.

It can be seen from the above that, compared with the traditional gold fingers used for input and output connections, the gold finger structure provided by the embodiment of the present invention increases the distance B between the front ends of adjacent gold fingers in the insertion direction, the The spacing B is at least greater than the distance required for arc extinguishing, so that the phenomenon of breakdown and short circuit between adjacent gold fingers caused by ignition and arcing at the front end of the gold fingers can be avoided during hot swapping; The spacing is not only conducive to the miniaturization of the gold finger but also ensures the flow capacity of the gold finger.

The following analyzes and explains it in conjunction with the specific application scenarios of the golden finger structure, wherein the golden finger structure is applied to the power module and used as the input and output connection of the power module; it can be understood that this structural design can also be applied to other There is no specific limitation here for the case where gold fingers are used as input and output connections, or other occasions (during hot plugging) where sparking and arcing may occur and adjacent gold fingers are provided.

Wherein, it is necessary to realize that the distance B between the front ends of two adjacent gold fingers in the insertion direction is greater than the distance b between the rear ends of the insertion direction, and the front ends of the two adjacent gold fingers in the insertion direction may be in the shape of a gap. corner setting, the missing corners on the two adjacent gold fingers are set oppositely; or the front end of one of the two adjacent gold fingers in the insertion direction is set as a missing corner to meet the requirements of the gold finger. The distance B between the front ends of the insertion direction is greater than the distance between the rear ends b of the insertion direction, and the distance between the front ends of the two adjacent golden fingers in the insertion direction is at least greater than the arc extinguishing distance.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of the golden finger structure 1 in the power module provided by the embodiment of the present invention. In this application scenario, the golden finger is used as the input and output connection of the power module in the case of a general single-phase AC power grid input. In this embodiment, the gold finger structure 1 includes three gold fingers arranged adjacent to each other, which are respectively a ground wire gold finger, a live wire gold finger, and a neutral wire gold finger, wherein the ground wire gold finger can be called a gold finger PE The full name of PE in English is protecting earth, and the simplified Chinese name is protective conductor, which is what we usually call the ground wire; the gold finger of the zero line can be called the gold finger N end, which is the neutral end; Finger L end.

It is understandable that since the PE end of the gold finger does not have ignition and arcing during hot plugging, the distance between the front end of the PE end of the gold finger does not need to be changed; while the N end of the gold finger and the L end of the gold finger may not be changed. Sparking and arcing will occur, so the N end of the gold finger and the L end of the gold finger are two adjacent gold fingers that need to change the distance between the front ends, and the front end of the insertion direction is set at a cutaway, that is, the insertion direction The front end is narrower than the rear end, as shown in Figure 2, the position of the missing corner at the front end of the N-terminal of the gold finger is "L-shaped", that is, the horizontal and vertical sides of the missing corner are set at right angles; The corner and the front end of the L end of the gold finger are oppositely set, that is, the front end of the L end of the gold finger can be considered as an anti-"L-shaped" setting symmetrical to it, so that the gap between the N end of the gold finger and the front end of the L end of the gold finger The distance B is greater than the distance b between the N end of the gold finger and the rear end of the L end of the gold finger, and the distance B is at least greater than the arc extinguishing distance.

It should be noted that, in the application scenario of this embodiment, the gold finger is applied to the single-phase AC power grid input, so the two adjacent golden fingers that need to change the distance between the front ends are the N terminal of the gold finger and the L end of the gold finger. It is understandable that in other application scenarios, the golden finger is not applied to the input of single-phase AC power grid, for example, it is applied to the input of high-power signal, and the distance between two adjacent terminals needs to be changed. The set gold finger is the signal line of the high-power signal and the reference ground of the signal.

In the application scenario of this embodiment, the distance between the front ends of the two adjacent golden fingers in the insertion direction is 6 mm, that is, it can be considered that in this implementation manner, the arc extinguishing distance is 6 mm; it is easy to think Yes, this specific value is just a preferred implementation mode. In some scenarios with higher performance, the arc extinguishing distance may be required to be smaller, and the arc extinguishing distance can ensure arc extinguishing between the N end and the L end of the golden finger. However, the specific value of the arc extinguishing distance is not limited.

It should be noted that the shape setting of the missing corner in this embodiment is not necessarily a very standard "L" shape. For example, the horizontal side and the vertical side can be set at an obtuse angle (that is, they may not be connected at right angles), or the horizontal side can be compared to the vertical side. The vertical side should be long, etc., which will not affect the realization of the function of the golden finger structure 1 .

Refer to FIG. 3 together. FIG. 3 is another schematic diagram of the gold finger structure 1 in the power module provided by the embodiment of the present invention, wherein, the front end notch positions of the gold finger N end and the gold finger L end are horizontal and There is an obtuse angle between the vertical sides, and the notch at the front end of the N end of the gold finger is set opposite to the notch at the front end of the L end of the gold finger. Another schematic diagram of the golden finger structure 1 in the power module provided by the embodiment of the invention, wherein, the cutaway corners at the front end of the N-end of the golden finger and the L-end of the golden finger are arc-shaped, and the cutaway corners at the front end of the N-end of the golden finger and The missing corners at the front end of the L end of the golden finger are set opposite to each other, and the gap between the missing corners is at least greater than the arc extinguishing and insulation distance; please refer to Fig. 5, which is another schematic diagram of the golden finger structure 1 in the power module provided by the embodiment of the present invention. In the figure, wherein, the notch at the front end of the N end of the gold finger and the L end of the gold finger is stepped, and the notch at the front end of the N end of the gold finger is opposite to the notch at the front end of the L end of the gold finger, and the distance between the notch is at least greater than that of the arc extinguishing and insulation distance.

It is also easy to think that in the embodiment of the present invention, only the L-shaped, arc-shaped, or stepped-shaped corners of the front end of the golden finger are analyzed as an example, but it is not used as a limitation of the present invention; that is, in actual design, the The connection forms of the front notch and the rear end of the N end of the gold finger and the L end of the gold finger are not limited to the several forms described in the above embodiments, and will not be described in detail here.

Further, you can refer to FIG. 6, which is a schematic diagram of the design dimensions of the gold finger structure provided by the embodiment of the present invention. Taking the N terminal and L terminal of the gold finger used as input and output in the power module as an example, specifically, the embodiment of the present invention The size of the missing corner of the front end of the gold finger in the provided gold finger structure 1 can be designed based on the following methods in the actual application scenario: First, the width A of the gold finger can also be considered as the N end and the L end of the gold finger The width of the rear end of the insertion direction is mainly set according to the flow requirements, the thickness of the gold finger copper and the allowable flow density. The width needs to ensure sufficient flow capacity and structural strength; second, the N end of the gold finger The distance between the front end and the L end, firstly, the front end distance B must be at least greater than the arc extinguishing distance, that is, in the event of ignition and arcing, the front end distance B can play the role of arc extinguishing insulation, followed by the gold finger N end and L end The distance b between terminals must be at least greater than the insulation distance. The insulation distance refers to the safety insulation distance that needs to be met between adjacent gold fingers. This distance b is related to the insulation type, working voltage, pollution level, and working altitude. Specifically refer to relevant safety standards, such as EN60950, etc. In this embodiment, the front-end distance B can be 6 mm, and the insulation distance is required to be 2.6 mm, which is actually 3.2 mm. and the specific value of the insulation distance; third, the lengths C and D of the missing corners of the N-end and L-end of the gold finger in the insertion direction, where the length C needs to ensure that the connecting terminal reed 2 that cooperates with the gold finger is in the position of the gold finger Wider position, so as to ensure the flow capacity, that is, the connection terminal reed 2 is in contact with the rear end position of the gold finger insertion direction, so the value of the length C depends on the connection terminal reed that matches with the gold finger 2; the length D is related to the value of the length C, which can be between 0 and C.

It can be understood that in Figure 6, only the N-terminal and L-terminal corners of the golden finger are "L"-shaped (non-standard "L"-shaped as shown in Figure 3) as an example for dimensional design analysis, and the dimensional design analysis is also It is applicable to two adjacent golden fingers set in other notch shapes, and is not specifically limited here.

It can be seen from the above that, compared with the traditional gold fingers used for input and output connections, a gold finger structure provided by the embodiment of the present invention is applied to the power module and used as the input and output connections of the power module. The distance B between the missing corners of the N-end and L-end of the gold finger, the distance B is at least greater than the distance required for arc extinguishing, so that it can avoid arcing due to the position of the front-end ports of the N-end and L-end of the gold finger during hot plugging This causes a breakdown and short circuit between the N-terminal and the L-terminal of the adjacent gold fingers; and since the overall spacing of the gold fingers is not changed, it is not only beneficial to the miniaturization of the gold fingers but also ensures the flow capacity of the gold fingers.

In view of the design of the gold finger structure 1, the embodiment of the present invention also provides a power module, which includes the gold finger structure 1 as described in the above embodiment, the power module can be a primary power module, AC ( Alternating Current)/DC (Direct Current) power supply modules, etc.; such as server power supplies, etc., which use golden fingers as input and output connection power modules; refer to Figure 2 to Figure 5 together, and the golden finger structure is used as the input and output of the power module connection, it can be understood that this structural design can also be applied to other situations where golden fingers are used as input and output connections, or other connection occasions (during hot plugging) where sparking and arcing occur and adjacent golden fingers are provided, No specific limitation is made here.

In addition, the power module further includes a connecting terminal reed 2 matched with the golden finger structure 1 , and the connecting terminal reed 2 is in contact with the rear end of the golden finger insertion direction. Referring to FIG. 6 , the length C of the golden finger structure 1 needs to ensure that the connection terminal reed 2 mated with the golden finger is at a wider position of the golden finger, so as to ensure the flow capacity.

It can be seen from the above that, compared with the traditional power module using gold fingers as input and output connections, the embodiment of the present invention provides a power module with a gold finger structure, which increases the distance between the front ends of adjacent gold fingers in the insertion direction. The distance between the gold fingers, which is at least greater than the distance required for arc extinguishing, makes it possible to avoid the phenomenon of breakdown and short circuit between adjacent gold fingers caused by ignition and arcing at the front end of the gold fingers during hot plugging; and because there is no change The overall spacing of the gold fingers is not only conducive to the miniaturization of the gold fingers but also ensures the flow capacity of the gold fingers.

The gold finger structure provided by the present invention and the power supply module with the gold finger structure have been introduced in detail above. For those skilled in the art, based on the ideas of the embodiments of the present invention, both the specific implementation and the scope of application are the same. There will be changes, and in summary, the contents of this specification should not be construed as limiting the present invention.

Claims (6)

1. a golden finger structure, is characterized in that, comprising:

At least two golden fingers be disposed adjacent, distance between the front end of described two golden finger direction of insertion be disposed adjacent is greater than the distance between the rear end of direction of insertion, and the distance between the front end of described two golden finger direction of insertion be disposed adjacent at least is greater than arc extinguishing distance;

Wherein, comprising:

The front end of described two golden finger direction of insertion be disposed adjacent is that unfilled corner is arranged, and the unfilled corner on described two golden fingers be disposed adjacent is for being oppositely arranged; Or the front end of a golden finger direction of insertion in described two golden fingers be disposed adjacent is that unfilled corner is arranged;

Described unfilled corner is L-type, and the unfilled corner of described L-type comprises horizontal sides and vertical edges;

Distance between the front end of described two golden finger direction of insertion be disposed adjacent at least be greater than arc extinguishing distance be specially described adjacent two arrange golden finger direction of insertion front end L-type unfilled corner vertical edges between distance be greater than arc extinguishing distance.

2. golden finger structure according to claim 1, is characterized in that, described golden finger structure connects for the input and output of power module.

3. golden finger structure according to claim 1, is characterized in that, the distance between the front end of described two golden finger direction of insertion be disposed adjacent is 6 millimeters.

4. a power module, is characterized in that, described power module comprises the golden finger structure as described in any one of claims 1 to 3.

5. power module according to claim 4, is characterized in that, described power module is primary power source module, exchanges AC/ direct current DC power module.

6. the power module according to claim 4 or 5, is characterized in that, also comprises the splicing ear reed matched with described golden finger structure in described power module, and described splicing ear reed contacts with the back-end location of described golden finger direction of insertion.