CN216529424U - High-power supply connecting terminal - Google Patents

Abstract

The utility model provides a high-power supply wiring terminal which comprises an insulated mounting base and a plurality of conductive terminals, wherein the conductive terminals comprise wiring ends which are fixed in the mounting base and used for fixing electric wires, and welding ends which extend out of the mounting base and are used for being welded with a PCB (printed circuit board), the welding ends are provided with welding surfaces corresponding to the PCB, a plurality of welding pins are vertically distributed on the welding surfaces, and each welding pin is connected with the welding surfaces through a frustum part with the cross section area gradually increasing towards the welding surfaces. The frustum portion makes has clearance space between face of weld and the PCB board, and during the welding, the clearance space between each frustum portion can be steeped to the back of the body from the PCB board to the tin liquid for the both sides face simultaneous weld of welding pin and PCB board has increased the electrically conductive area between welding pin and the PCB board, can not only avoid generating heat and damage the PCB board, and reducible welding pin quantity and face of weld area can also avoid vibrating and damage the PCB board moreover.

Description

High-power supply connecting terminal

Technical Field

The utility model relates to the technical field of electric connection terminals, in particular to a high-power electric connection terminal for products such as a sound box power amplifier and the like.

Background

In the equipment such as a high-power audio processor, a high-power wiring terminal connected with a power supply is needed, and the wiring terminal has larger load and higher requirement on performance. A conventional connection terminal 100 shown in fig. 1 includes a plurality of cylindrical soldering pins 101 which are insert-soldered to a PCB, but the connection terminal 100 of this structure has the following problems: after the welding pins 101 are inserted on the PCB, the welding surface 102 is attached to the PCB, and the welding pins 101 need to be welded on the other side of the PCB to be fixed, at the moment, the contact conductive area between the welding pins 101 and the PCB is limited, when a large current passes through, the heat productivity is large, after the welding pins are used for a period of time, the copper foil of the PCB is easy to warp, and the PCB is damaged finally; when the high-power audio processor is used in scenes such as automobile sound equipment, the copper foil of the PCB is easily damaged or loosened due to the fact that vibration is large, the self weight of the wiring terminal is heavy, and the welding fixing area is limited; in addition, the wiring end of the wiring terminal is fixed with the electric wire in a screw locking mode, but the connection part of the electric wire and the wiring terminal is often broken due to large vibration during use, and broken copper wires can enter the inside to cause faults such as circuit short circuit and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-power supply wiring terminal with reliable connection and high current conduction efficiency.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the high-power supply terminal 21 comprises an insulated mounting base 1 and a plurality of conductive terminals 2, wherein the conductive terminals 2 comprise a terminal 21 fixed in the mounting base 1 and used for fixing wires and a welding end 22 extending out of the mounting base 1 and used for being welded with a PCB, the welding end 22 is provided with a welding surface corresponding to the PCB, a plurality of welding pins are vertically distributed on the welding surface, and each welding pin is connected with the welding surface through a frustum part with a cross section area gradually increasing towards the welding surface.

In a preferred embodiment, the cross section of the soldering pin is rectangular, and the frustum portion is a square frustum whose top portion is adapted to the soldering pin.

According to a preferred scheme, the welding pins are uniformly distributed on the welding surface in a matrix manner.

In a preferred embodiment, the soldering surface has a screw hole for locking the PCB board to the soldering terminal 22.

In a preferred embodiment, the terminal 21 has a wire hole for accommodating the wire, and a wire locking screw for locking the wire, and a bottom end surface of the wire locking screw contacting with the wire is a circular arc surface.

In a preferred embodiment, the thread locking screw penetrates into the thread hole obliquely.

In a preferred embodiment, the working surfaces of the terminal 21 and the welding terminal 22 are perpendicular to each other, and the welding terminal 22 has a connecting section with a chamfered top surface from the mounting base 1 to the welding surface.

In a preferred scheme, a plurality of grooves arranged in parallel are formed in the oblique cutting surface of the connecting section.

In a preferred embodiment, the mounting base 1 includes a plurality of mounting cavities for accommodating the terminals 21, and a wall of the mounting cavity has a first through hole corresponding to the wire hole and a second through hole corresponding to the wire-locking screw.

In a preferred embodiment, the conductive terminal 2 and the mounting base 1 are formed into an integral structure by injection molding.

The beneficial effects are that: 1. set up frustum portion between welding pin and the face of weld, make when welding pin pegs graft on the PCB board, clearance space has between face of weld and the PCB board, when the welding of PCB board back, fused tin liquid can follow the clearance space that the PCB board back of the body steeped between each frustum portion, make the both sides face concurrent welding of welding pin and PCB board, the electrically conductive area between welding pin and the PCB board has been increased, can not only avoid generating heat and damage the PCB board, but also reducible welding pin quantity and face of weld area, and can make the welding more firm reliable, avoid vibrating and damage the PCB board. 2. The welding pins with rectangular sections have longer circumferences than the circular pins with the same area, namely, the conductive area is larger when the welding pins are welded with a PCB (printed circuit board), the number of the welding pins of the conductive terminals 2 and the area of a welding surface can be further reduced under the condition of the same load, and more space is reserved for the PCB. 3. The arc surface of lockwire screw bottom extrudees the copper pencil of electric wire uniformly for copper pencil atress is even everywhere and can not sheared, compares the crew cut screw among the prior art, and the copper line of marginal portion can not be because of the atress is bigger and break easily.

Drawings

The present invention will be described in further detail with reference to the following drawings and specific examples.

Fig. 1 is a partial structural schematic view of a connecting terminal in the background art;

fig. 2 is a perspective view of the terminal of the embodiment;

FIG. 3 is a first perspective view of the conductive terminal of the embodiment;

FIG. 4 is a second perspective view of the conductive terminal of the embodiment;

FIG. 5 is a schematic structural view of a lockwire screw according to an embodiment;

fig. 6 is a schematic structural view of the mounting base 1 in the embodiment.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

referring to fig. 2 to 6, the present embodiment is described by taking a high power supply connection terminal for an audio processor as an example, the connection terminal includes an insulating mounting base 1 and a plurality of conductive terminals 2, the conductive terminals 2 include a terminal 21 fixed in the mounting base 1 for fixing a wire and a solder terminal 22 extending out of the mounting base 1 for soldering with a PCB, the solder terminal 22 has a soldering surface 221 corresponding to the PCB, a plurality of soldering pins 222 are vertically distributed on the soldering surface 221, and preferably, the soldering pins 222 are uniformly distributed on the soldering surface 221 in a matrix. Each of the bonding pins 222 is connected to the bonding surface 221 through a tapered portion 223 having a cross-sectional area gradually increasing toward the bonding surface 221. The cross section of the soldering pin 222 may be circular, square, polygonal, etc., and the top surface of the frustum portion 223 engaged with the soldering pin 222 may be in the shape of a truncated cone, a truncated square, etc.

When the audio processor is used, the mounting base 1 is locked on a shell of the audio processor, one side of the mounting base 1 corresponding to the terminal 21 is exposed outside the audio processor, the welding end 22 is located inside the audio processor, and the welding pin 222 is inserted on the PCB. Set up frustum portion 223 between welding pin 222 and the face of weld 221, make when welding pin 222 pegs graft on the PCB board, have clearance space between face of weld 221 and the PCB board, when the welding of PCB board back, the molten tin liquid can be followed the PCB board back and immersed the clearance space between each frustum portion 223, make welding pin 222 and the both sides face of PCB board weld simultaneously, the electrically conductive area between welding pin 222 and the PCB board has been increased, can not only avoid generating heat and damage the PCB board, and reducible welding pin 222 quantity and face of weld 221 area, and can make the welding more firm reliable, avoid vibrating and damage PCB board copper foil layer.

In a preferred embodiment, the cross-section of the soldering terminal 222 is rectangular, and the tapered portion 223 is a square tapered portion whose top is adapted to the soldering terminal 222. The welding pins 222 with rectangular cross sections have a longer perimeter than the circular pins with the same area, i.e. the conductive area when welding with the PCB is larger, under the same load, the number of the welding pins 222 and the area of the welding surface 221 of the conductive terminal 2 can be further reduced, and more space is reserved for the PCB.

In a preferred embodiment, the soldering surface 221 has a screw hole 224 for locking the PCB with the soldering terminal 22. By locking the soldering terminal 22 with the PCB by a screw, the fixation can be further strengthened, and the damage of the PCB caused by the vibration of the wiring terminal can be avoided.

In a preferred embodiment, the terminal 21 has a wire hole 211 for receiving a wire, and a wire locking screw 212 for locking the wire, and a bottom end surface of the wire locking screw 212 contacting the wire is a circular arc surface 2121. The arc surface 2121 at the bottom end of the wire locking screw 212 uniformly extrudes the copper wire bundle of the electric wire, so that the copper wire bundle is uniformly stressed and cannot be sheared, and compared with the flat head screw in the prior art, the copper wire at the edge part cannot be easily broken due to larger stress. Further, the locking screw 212 is inserted into the wire hole 211 in an oblique direction. The thread combination surface of the locking thread screw 212 and the conductive terminal 2 is obliquely arranged, so that one side of the locking thread screw 212 is always in thread fit with the conductive terminal 2, and the locking thread screw 212 can be loosened. Of course, in other embodiments, the locking wire screw 212 may be perpendicular to the wire hole 211, but the length of the thread fit between the locking wire screw 212 and the conductive terminal 2 is required to be ensured to avoid loosening.

In a preferred embodiment, the working surfaces of the terminal 21 and the soldering terminal 22 are perpendicular to each other, and the soldering terminal 22 has a connecting section 225 whose top surface is chamfered from the mounting base 1 to the soldering surface 221. On the premise of ensuring the load capacity and the installation size, the inclined plane of the connecting section 225 can reduce the volume of the conductive terminal 2, reduce the product cost, lighten the weight of the wiring terminal and reduce the possibility of damaging the copper foil of the PCB due to vibration. The chamfered surface of the connecting section 225 has a plurality of grooves 2251 arranged in parallel. The groove 2251 can further reduce the weight, increase the heat dissipation surface area of the exposed portion of the conductive terminal 2, and enhance the heat dissipation capability. The grooves 2251 may be several parallel circular arc grooves or triangular grooves, or distributed laterally, or distributed longitudinally, or distributed crosswise, or may be other recessed structures, such as pits uniformly distributed on the surface.

In a preferred implementation structure, the mounting base 1 includes a plurality of mounting cavities 11 for receiving the terminals 21, and the walls of the mounting cavities 11 have first through holes 12 corresponding to the wire holes 211 and second through holes 13 corresponding to the wire locking screws 212. The conductive terminal 2 and the mounting base 1 are formed into an integral structure through injection molding. The integrated structure makes the wiring terminal structure more reliable.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. High-power supply binding post, its characterized in that: the conductive terminals comprise wiring ends which are fixed in the mounting base and used for fixing electric wires and welding ends which extend out of the mounting base and are used for being welded with a PCB, the welding ends are provided with welding faces corresponding to the PCB, a plurality of welding pins are vertically distributed on the welding faces, and each welding pin is connected with the welding faces through a frustum part with the cross section area gradually increasing towards the welding faces.

2. The high power supply terminal according to claim 1, wherein: the cross section of the welding pin is rectangular, and the frustum part is a square frustum the top of which is adapted to the welding pin.

3. A high power supply terminal according to claim 2, wherein: the welding pins are uniformly distributed on the welding surface in a matrix manner.

4. A high power supply terminal according to claim 3, wherein: the welding surface is provided with a screw hole used for locking the PCB and the welding end.

5. The high power supply terminal according to claim 1, wherein: the wiring end is provided with a wire hole for accommodating the wire and a wire locking screw for locking the wire, and the bottom end surface of the wire locking screw, which is in contact with the wire, is an arc surface.

6. The high power supply terminal according to claim 5, wherein: the locking screw obliquely penetrates into the wire hole.

7. The high power supply terminal according to claim 5, wherein: the mounting base comprises a plurality of mounting cavities used for containing the wiring terminals, and first via holes corresponding to the wiring holes and second via holes corresponding to the wiring locking screws are formed in the wall of each mounting cavity.

8. The high power supply terminal block of claim 7, wherein: the conductive terminal and the mounting base are formed into an integral structure through injection molding.

9. The high power supply terminal according to claim 1, wherein: the wiring end with the working face mutually perpendicular of welding end, the welding end is followed the mounting base extremely the welding face has a connecting section that a section top surface is the scarf.

10. A high power supply terminal according to claim 9, wherein: the oblique cutting surface of the connecting section is provided with a plurality of grooves which are arranged in parallel.

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