CN209982826U

CN209982826U - Fuse support and PCB

Info

Publication number: CN209982826U
Application number: CN201920246824.5U
Authority: CN
Inventors: 葛模江; 江宝迪; 吴壬华
Original assignee: Shenzhen Shinry Technologies Co Ltd
Current assignee: Shenzhen Shinry Technologies Co Ltd
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2020-01-21
Anticipated expiration: 2029-02-27

Abstract

The utility model relates to a protective tube support and PCB board. The fuse tube bracket is used for supporting a fuse tube which is horizontally arranged on a PCB. The protective tube support is made of insulating materials and comprises a positioning part and supporting legs. The number of the supporting legs is at least two, and the supporting legs are used for supporting the positioning portion. The positioning part comprises a first surface opposite to the PCB, and an accommodating space is surrounded by the first surface, the two support legs and the PCB and used for accommodating electronic devices on the PCB. The positioning part is far away from one side of the PCB and is further provided with a groove, and the inner cavity of the groove is matched with the shape of the fuse tube and used for accommodating the fuse tube. And when the protective tube is accommodated in the groove, a gap is reserved between the protective tube and the electronic device. This application protective tube support can provide reliable support to the protective tube, keeps safe distance when guaranteeing simultaneously that the protective tube stacks on other electron device, realizes independent work, each other noninterference.

Description

Fuse support and PCB

Technical Field

The present application relates to the field of electronic products, and in particular, to a fuse holder for supporting a fuse mounted in a high-lying manner, and a PCB including the fuse holder.

Background

The market of electronic products is becoming more and more miniaturized and portable. In order to save the volume, the PCB used in the electronic product also needs to control the external dimension. Therefore, the demand of high-lying installation is gradually raised for the fuse tube frequently used on the PCB, that is, the fuse tube is arranged over other electronic devices on the PCB in a stacked installation manner.

Because the fuse tube stitch intensity is relatively poor, for the fuse tube of high horizontal mode installation, need have corresponding bearing structure to provide reliable support and fixed to the fuse tube, avoid in the use because reasons such as vibrations cause the defect such as the aversion of fuse tube. Meanwhile, due to the fact that the PCB is widely applied to the protective tube, cost needs to be saved as much as possible in the installation process of the protective tube, and convenience and rapidness in assembly need to be achieved. Further, in the process of mass production, the support structure of the fuse tube needs to consider factors such as assembly consistency and quality control.

SUMMERY OF THE UTILITY MODEL

The application provides a simple structure and easy insurance pipe support of installation specifically includes following technical scheme:

a fuse tube bracket is used for supporting a fuse tube which is horizontally arranged on a PCB board, the fuse tube bracket is made of insulating materials, the protective tube support comprises a positioning part and at least two support legs, the two support legs are respectively arranged at two opposite ends of the positioning part, the positioning part is far away from the PCB relative to the support leg, the support leg is used for supporting the positioning part, the positioning part comprises a first surface opposite to the PCB, the first surface, the two support legs and the PCB surround a containing space, the accommodating space is used for accommodating the electronic device on the PCB, one side of the positioning part far away from the PCB is also provided with a groove, the inner cavity of the groove is matched with the shape of the protective tube, the groove is used for accommodating the protective tube, and when the protective tube is accommodated in the groove, a gap is reserved between the protective tube and the electronic device.

Wherein, the clearance between the protective tube and the electronic device is greater than or equal to 4mm, and the creepage distance between the protective tube and the electronic device is greater than or equal to 6 mm.

The groove is arranged along the length direction of the protective tube and is a U-shaped groove or a V-shaped groove.

The groove is further provided with blocking pieces, the blocking pieces are respectively arranged at two ends of the groove in the length direction of the protective tube, and the blocking pieces are used for preventing the protective tube from moving in the length direction.

The fuse tube extends out of two ends in the length direction and is provided with pins, and the pins penetrate through the blocking pieces and are connected to the PCB.

The side, far away from the accommodating space, of the support leg is provided with a positioning bulge, the positioning bulge is provided with a through hole, and the pin penetrates through the through hole to be connected with the PCB.

And a spacing distance is arranged between the positioning bulge and the PCB, so that a welding space required by the pin is reserved between the through hole and the PCB.

The safety tube is characterized in that the groove comprises two opposite side walls and at least one notch, and the notches are perpendicular to the length direction of the safety tube and used for facilitating taking of the safety tube.

The positioning part is provided with a plurality of grooves side by side far away from one side of the PCB, so that the fuse tube support can simultaneously support a plurality of fuse tubes side by side.

The application also relates to a PCB board, including the protective tube of at least one high formula installation on the PCB board, just the protective tube adopts foretell protective tube support to be fixed in on the PCB board.

The application the protective tube support, come through insulating material to the protective tube provides the support, can realize the insulating function of protective tube. The fuse tube support supports the positioning part through the support legs arranged at two opposite ends of the positioning part, so that the positioning part is overhead on the PCB to be matched with the high-lying installation posture of the fuse tube. This application the protective tube support still through for the first face and two of PCB board the stabilizer blade, with the PCB board encloses out accommodating space jointly, so that be fixed in the protective tube with electron device between the PCB board can with the range upon range of setting of protective tube. The fuse tube support further contains the fuse tube through the positioning portion, the position of the fuse tube is far away from the groove in the PCB, and therefore the fuse tube is fixed relative to the fuse tube support. The fuse tube support fixes the fuse tube, simultaneously guarantees a gap between the fuse tube and the stacked electronic devices, prevents the electronic devices from interfering with each other due to too close distance between the electronic devices and the fuse tube, and guarantees that the electronic devices and the fuse tube installed in a high-lying position work independently.

Drawings

FIG. 1 is a schematic view of a fuse holder of the present application;

fig. 2 is a schematic view of a PCB board of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Please refer to the fuse holder 100 shown in fig. 1 and the PCB board 200 shown in fig. 2. The fuse holder 100 of the present application is used to provide support for a fuse 300 mounted in a high-lying position on a PCB board 200. The fuse holder 100 is made of an insulating material, and is usually made of a plastic material, so that the fuse 300 can be conveniently placed, and meanwhile, the fuse holder can pass through a furnace together with the PCB 200, and the fuse 300 can be positioned on the PCB in the assembling process. The fuse holder 100 includes a fixing portion 10 and legs 20, wherein the number of the legs 20 is at least two. Two legs 20 are arranged at opposite ends of the positioning portion 10. The position fixing part 10 is distant from the PCB board 200 with respect to the legs 20, and the legs 20 serve to support the position fixing part 10. This arrangement allows the positioning portion 10 to straddle the PCB board 200. The positioning portion 10 includes a first surface 11 opposite to the PCB 200, and the first surface 11, the two legs 20 and the PCB 200 enclose an accommodating space 101. The PCB 200 is fixedly provided with an electronic device 210. The receiving space 101 is used for receiving the electronic device 210. A groove 12 is further formed in one side of the positioning portion 10 away from the PCB 200, an inner cavity of the groove 12 matches with the shape of the fuse 300, and the groove 12 is used for accommodating the fuse 300. When the fuse tube 300 is accommodated in the groove 12, a gap is left between the fuse tube 300 and the electronic device 210, and the gap is used for controlling the spacing distance and the creepage length between the fuse tube 300 and the electronic device 210, so that the fuse tube 300 can be spaced from the electronic device 210 by a sufficient distance when being arranged on the electronic device 210 in a high-lying manner, the fuse tube 300 and the electronic device 210 do not interfere with each other, and the two devices are ensured to work independently.

This application protective tube support 100 supports protective tube 300 through insulating material, has guaranteed protective tube 300's insulating effect on the one hand, and on the other hand compares in independently supporting protective tube 300's structure through the stitch, and this application protective tube support 100 has still improved protective tube 300's support strength, guarantees that PCB board 200 still can keep the spacing distance between protective tube 300 and electron device 210 after the vibration strikes for PCB board 200 can effectively work. Meanwhile, in the process of mass production, the fuse holder 100 of the present application can provide reliable mounting accuracy for the fuse 300, and ensure the dimensional consistency of the PCB board 200, thereby improving production efficiency and yield.

It should be noted that when the fuse holder 100 is made of plastic material, the plastic material is required to have a heat-resistant temperature higher than 180 degrees because the plastic material is passed through the oven together with the PCB 200. On the other hand, the electronic component 210 on the PCB 200 is generally a general-purpose electronic component such as a capacitor. Of course, in other embodiments, the electronic device 210 may also be an electronic component in other forms, and the solution of the fuse holder 100 of the present application is not particularly limited thereto.

In one embodiment, in order to meet the requirements of the motor for an electric vehicle and the controller thereof in GB/T18488.1-2006 on the electrical clearance and the creepage distance in the vehicle-mounted electrical box, when the fuse tube 300 is accommodated in the groove 12, it is required to ensure that the clearance between the fuse tube 300 and the electronic device 210 is greater than or equal to 4mm, and the creepage distance between the fuse tube 300 and the electronic device 210 is greater than or equal to 6 mm.

In one embodiment, the groove 12 is configured to be shaped along the length of the fuse tube 300 such that the groove 12 provides reliable support and containment of the fuse tube 300 when the fuse tube 300 is received in the groove 12. And the groove 12 is a U-shaped groove or a V-shaped groove. Generally, the fuse tube 300 has a cylindrical shape, and when the groove 12 is disposed along the axial direction of the cylinder, the contact area between the groove 12 and the fuse tube 300 can be increased, thereby providing more reliable positioning of the fuse tube 300. Meanwhile, the U-shaped groove and the V-shaped groove can provide reliable support for the cylindrical fuse tube 300, and prevent the fuse tube 300 from sliding and shifting relative to the groove 12.

In one embodiment, the recess 12 is further provided with a stop tab 121. Specifically, the blocking pieces 121 are respectively arranged at two ends of the groove 12 in the length direction of the protective tube 300. Because fuse tube 300 is placed lengthwise within groove 12, fuse tube 300 lacks a limit in the lengthwise direction. After the blocking piece 121 is provided, the fuse tube 300 can be prevented from moving in the length direction, so that the fuse tube 300 is completely fixed in the fuse holder 100 of the present application.

In one embodiment, pins 310 extend from both ends of the fuse tube 300 along the length direction. The pin 310 is electrically connected to the PCB 200 to implement the circuit conducting function of the fuse 300. The blocking plate 121 is required to be provided with a via hole 122 allowing the pin 310 to pass through, and after the pin 310 passes through the via hole 122, the pin 310 extends to the PCB 200 and is welded and fixed with the PCB 200, so that the fuse 300 is conductively connected with the PCB 200. It should be noted that, in order to facilitate the assembly of the fuse tube 300, the through hole 122 is preferably disposed to communicate with the edge of the blocking piece 121 to form a hollow passage. When the fuse tube 300 is placed in the groove 12, the pins 310 enter the through holes 122 along the hollow-out paths of the blocking pieces 121 along with the placement of the fuse tube 300, so that the installation and the positioning of the fuse tube 300 can be facilitated, and the installation time of the fuse tube 300 can be saved.

In one embodiment, the side of the leg 20 away from the receiving space 101 is provided with a positioning protrusion 21. The positioning protrusion 21 is further provided with a through hole 22, the through hole 22 is used for allowing the pin 310 to pass through, and the pin 310 is held by the through hole 22 after passing through the through hole 22, so that the pin 310 is not easily deformed under an external force, and the connection between the pin 310 and the PCB 200 is more stable.

In one embodiment, in order to leave a soldering space between the pin 310 and the PCB 200 for facilitating the operation of the soldering process, a certain distance is provided between the positioning protrusion 21 and the PCB 200.

In one embodiment, the groove 12 includes opposing sidewalls 123 extending perpendicular to the length of the fuse tube 300. I.e., the V-shaped or U-shaped groove 12 includes opposing side walls 123. At least one of the side walls 123 is provided with a notch 124, and the notch 124 is used to facilitate the loading or unloading of the fuse tube 300 from the fuse tube holder 100 of the present application.

In one embodiment, multiple fuses 300 may be simultaneously carried on the same fuse holder 100. Specifically, the positioning portion 10 is provided with a plurality of grooves 12 in parallel on a side away from the PCB board 200. The plurality of grooves 12 arranged side by side can accommodate a plurality of fuse tubes 300 side by side, so that the fuse holder 100 can simultaneously support a plurality of fuse tubes 300 side by side, and the structure is more compact. It should be noted that, in the present embodiment, because the plurality of grooves 12 are arranged side by side, the width of the fuse holder 100 of the present application is widened, and the receiving space 101 is increased accordingly. And one or more electronic devices 210 can be accommodated in the accommodating space 101. When there are a plurality of electronic devices 210 in the receiving space 101, a gap distance may be calculated between the fuse 300 and the electronic device 210 closest to the first surface 11, so as to ensure that the gap between the fuse 300 and any electronic device 210 in the receiving space 101 meets the use requirement, and thus, the function that the fuse 300 and the plurality of electronic devices 210 arranged side by side work independently is realized.

The present application also relates to a PCB board 200. The PCB 200 includes at least one safety tube 300 installed in a high-lying manner, and the safety tube 300 is fixed to the PCB 200 by using the above-mentioned safety tube holder 100. It can be understood that, the PCB 200 according to the present application is provided with the fuse holder 100 according to the present application, so that the fuse 300 installed in a high-lying manner can be stably and reliably fixed to the PCB 200, thereby improving the impact resistance and the service life of the PCB 200. Meanwhile, due to the arrangement of the fuse holder 100, the installation accuracy of the fuse 300 is ensured, and the yield of the PCB 200 is improved.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A fuse tube support is used for supporting a fuse tube which is horizontally arranged on a PCB and is characterized by comprising a positioning part and at least two support legs, wherein the two support legs are arranged at two opposite ends of the positioning part respectively, the positioning part is far away from the PCB relative to the support legs, the support legs are used for supporting the positioning part, the positioning part comprises a first surface relative to the PCB, the first surface, the two support legs and the PCB surround a containing space, the containing space is used for containing electronic devices on the PCB, a groove is further arranged at one side of the positioning part, which is far away from the PCB, the inner cavity of the groove is matched with the shape of the fuse tube, the groove is used for containing the fuse tube, and when the fuse tube is contained in the groove, a gap is also left between the fuse tube and the electronic device.

2. The fuse holder according to claim 1, wherein a gap between the fuse and the electronic device is greater than or equal to 4mm, and a creepage distance between the fuse and the electronic device is greater than or equal to 6 mm.

3. The fuse holder according to claim 2, wherein the groove is formed along a length direction of the fuse, and the groove is a U-shaped groove or a V-shaped groove.

4. The fuse holder according to claim 3, wherein the groove is further provided with a blocking piece, the blocking piece is arranged at two ends of the groove in the length direction of the fuse, and the blocking piece is used for preventing the fuse from moving in the length direction.

5. The fuse holder according to claim 4, wherein pins extend from both ends of the fuse in the length direction, and the pins pass through the blocking piece and are connected to the PCB.

6. The fuse holder according to claim 5, wherein a positioning protrusion is disposed on a side of the leg away from the receiving space, a through hole is disposed on the positioning protrusion, and the pin passes through the through hole and is connected to the PCB.

7. The fuse holder according to claim 6, wherein a spacing distance is provided between the positioning protrusion and the PCB, so that a soldering space required by the pin is reserved between the through hole and the PCB.

8. The fuse holder according to claim 3, wherein the groove comprises two opposite side walls in a direction perpendicular to the length direction of the fuse, and at least one side wall is provided with a notch for facilitating the taking of the fuse.

9. The fuse holder according to any one of claims 3 to 8, wherein the positioning portion is provided with a plurality of grooves side by side on a side away from the PCB, so that the fuse holder can simultaneously support a plurality of fuses side by side.

10. A PCB board, wherein the PCB board comprises at least one safety tube installed in a lying position, and the safety tube is fixed on the PCB board by using the safety tube bracket according to any one of claims 1 to 9.