An insulating support

Abstract

The utility model provides a kind of insulating support, including support body and limit sleeve;The support body is equipped with the Chinese character "ge" buckle, center column and stop step;The Chinese character "ge" buckle and center column of support can pass through shell through-hole, and the outer dimension of stop step is larger than shell through-hole size, and it can sink into the counterbore of shell;Limit sleeve and support center column are interference fit, and the lower end surface of limit sleeve and support stop step form clamping effect, so as to fix entire insulating support on shell.The insulating support is simple in structure, easy to install;It is reliable in fixing, and strong in impact resistance;It is small in board space, which is beneficial to product miniaturization.

Description

Technical Field

[0001] This utility model relates to an insulating bracket, and more particularly to an insulating bracket for a switching power supply circuit board. Background Technology

[0002] A typical switching power supply consists of a circuit board and a metal housing. Metal studs are usually pressed onto a metal base, and screws are used to secure the circuit board to the housing. These studs are usually located in the corners of the circuit board. However, as the power of the switching power supply increases, the size of the circuit board also increases. Heavier components such as transformers or inductors on the circuit board can cause significant up-and-down swaying during vibration testing, potentially leading to risks such as solder joint detachment. Therefore, studs and screws are needed in the middle of the circuit board for fixation. Since the studs and screws are metal conductors connected to the housing, which is generally considered to be grounded, a certain safety distance must be maintained between the components on the circuit board and the metal housing. Therefore, in addition to the space occupied by the screws themselves, space must be allocated for the safety distance, especially for photovoltaic products, which require even greater distances. This is particularly detrimental to product miniaturization.

[0003] To minimize the footprint, utility model application number 201320800933.X provides a circuit board bracket for a switching power supply, such as... Figure 1 As shown in Figure 4, it can only provide upward support and cannot effectively fix the object, so the effect is relatively poor. The utility model with application number 202021942848.3 has threads at its bottom, as shown... Figure 1 As shown in Figure 5, when used with a nut, it can effectively secure the circuit board to the housing. However, the threaded section is quite long, and for thin-shell products, the threaded section and nut will protrude from the outer surface of the housing, thus affecting the product's appearance. Figure 1 As shown in Figure 6, the utility model with application number 202320450114.0 has a threaded base at its bottom, which can effectively solve the problems of fixation and appearance. However, the thread structure is complex, and to ensure the reliability of the connection, the thread engagement length needs to be 1.5 times the diameter for the threaded blind hole. The conventional fastening thread specification is M3, so the size will reach more than 9mm. The bottom of the conventional circuit board is for surface mount devices and through-hole devices, and the bottom of the circuit board needs more than 3mm of space. This technical solution will cause a certain amount of space waste, and the structure is complicated to form, so it also has certain limitations.

[0004] In view of the various shortcomings of the existing insulating brackets, this utility model proposes a circuit board insulating bracket that is easy to process, assemble and securely fix. Utility Model Content

[0005] The present utility model aims to overcome the problems such as large board space occupation in the existing metal screw and stud connection method. To achieve the above object, the present utility model adopts the following technical solutions:

[0006] An insulating bracket, the insulating bracket includes a bracket body and a limiting sleeve, and is characterized in that: the bracket body is sequentially provided with a "T-shaped" buckle, a middle column and a stop step from top to bottom; the limiting sleeve is sleeved on the middle column and is in interference fit with the middle column.

[0007] Preferably, the radial circumscribed circle dimension of the stop step is larger than the radial circumscribed circle dimension of the middle column.

[0008] Preferably, the inner parts of the ends of the elastic arms on both sides of the "T-shaped" buckle extend along the axis of the bracket body 11 towards the middle column to form limiting flanges.

[0009] Preferably, the material of the bracket body is insulating plastic.

[0010] Preferably, the material of the limiting sleeve is an elastic material.

[0011] The present utility model has the following beneficial effects:

[0012] 1. The bracket is a plastic insulating part, without the need to reserve too much safety distance, reducing the board space occupation, which is beneficial to reducing the product size;

[0013] 2. Without structures such as threads, the injection molding die is simple, the structure is simple, and the installation is easy;

[0014] 3. Through the cooperation of the bracket body and the limiting sleeve, the circuit board is fixed axially and radially on the insulating bracket. The circuit board is fixed reliably, and can absorb the impact transmitted from the machine shell to the PCB board, with strong anti-impact ability;

[0015] 4. The insulating bracket does not protrude from the outer surface of the shell, optimizing the appearance effect and reducing the space occupation of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the assembly of the existing insulating bracket and the insulating bracket of the present utility model;

[0017] Figure 2 Partial cross-sectional three-dimensional schematic diagram of the insulating bracket of the present utility model;

[0018] Figure 3 Schematic diagram of the structure of the bracket body of the insulating bracket of the present utility model;

[0019] Figure 4 Schematic diagram of the structure of the limiting sleeve of the insulating bracket of the present utility model; <​​Schematic diagram of fixing the insulating bracket of the present utility model to the housing.

[0021] Figure 6 Assembly schematic diagram of the insulating bracket of the present utility model;

[0022] Reference numerals: 1, insulating bracket; 11, bracket body; 111, "I"-shaped buckle assembly; 112, middle column of the bracket; 113, stop step; 1111, limiting flange; 12, limiting sleeve; 121, upper end face; 122, lower end face; 2, circuit board; 3, outer shell; 4, existing insulating bracket I; 5, existing insulating bracket II; 6, existing insulating bracket III. Specific embodiments

[0023] To make the technical solution of the present invention clearer, the following will clearly and completely describe the embodiments of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are partial embodiments of the present invention. Without creative labor, those of ordinary skill in the art can make various other modifications, substitutions or changes to the present invention, and still fall within the protection scope of the present invention.

[0024] It should be particularly noted that in the present utility model, the length direction of the insulating bracket is defined as the axial direction, and the direction perpendicular to the axial direction is defined as the radial direction.

[0025] As Figure 2-4 shown, the present utility model provides an insulating bracket. The insulating bracket 1 includes a bracket body 11 and a limiting sleeve 12; the bracket body is an insulating plastic part, which can be integrally formed or formed separately and then assembled to obtain the bracket body. The forming methods include injection molding, 3D printing, etc. The bracket body 11 is sequentially provided with an "I"-shaped buckle 111, a middle column 112 and a stop step 113 from top to bottom; the limiting sleeve 12 is a hollow cylinder and can be made of silicone rubber; the outer circumscribed circle dimension of the stop step 113 is larger than the outer circumscribed circle dimension of the middle column 112.

[0026] As Figure 5-6As shown, the "I"-shaped buckle 111 and the middle column 112 of the bracket body 11 can pass through the fixing holes provided on the outer shell 3. The outer dimension of the stop step 113 is larger than the through-hole dimension of the fixing hole of the outer shell 3, preventing the bracket body 11 from detaching from the outer shell 3, achieving the limit of the bracket body 11 relative to the outer shell 3. At the same time, at least part of the stop step 113 can sink into the fixing hole provided on the outer shell 3, reducing the height protruding from the outer shell 3 or avoiding protruding from the outer surface of the outer shell 3, thus ensuring the flatness of the outer surface of the product; the outer dimension of the stop step 113 is larger than the middle column 112. The structure of the stop step 113 can be a frustum structure or a cylindrical structure, and its specific structure matches the morphology of the fixing hole provided on the outer shell 3; the fixing hole can be any one of a counterbore, a countersunk hole, and a spot-facing hole. After the bracket body 11 is inserted into the fixing hole on the outer shell 3, the limiting sleeve 12 is inserted from the top of the bracket and sleeved around the outer periphery of the middle column 112 of the bracket, with an interference fit with the middle column 112 of the bracket. The lower end face 122 of the limiting sleeve forms a clamping effect with the stop step 113 of the bracket, pre-fixing the insulating bracket 1 on the outer shell 3. At this time, the circuit board 2 is inserted through the "I"-shaped buckle 111 of the bracket body 11. After the elastic arms on both sides of the "I"-shaped buckle 111 are squeezed and contracted and pass through the openings on the circuit board 2, the elastic arms on both sides will spring open again and abut against the edge area of the openings; at this time, the upper end face 121 of the limiting sleeve 12 and the "I"-shaped buckle 111 above the bracket body 11 form a clamping to achieve the fixation of the circuit board 2 in the axial direction of the bracket body 11. In this installation state, the distance between the adjacent surfaces of the circuit board 2 and the outer shell 3 is the maximum installation distance; those skilled in the art know that the reset state height of the limiting sleeve 12 is greater than the above maximum installation distance; due to the certain elasticity of the limiting sleeve 12, after installation, the elastic reset of the limiting sleeve 12 can eliminate the gap in the axial direction of the bracket body 11 caused by tolerances.

[0027] Further, as Figure 6 shown, the inner part of the ends of the elastic arms on both sides of the "I"-shaped buckle 111 extends along the axial direction of the bracket body 11 towards the middle column to form a limiting flange 1111. After the head of the "I"-shaped buckle 111 passes through the opening, the limiting flanges 1111 at the ends of the elastic arms on both sides tightly abut against the inner wall of the opening on the circuit board 2 by means of the elastic reset of the elastic wall, fixing the circuit board 2 radially relative to the bracket body 11 and improving the stability of the circuit board fixation. In the practical application of the insulating bracket involved in the present utility model, only a space of 3.5 mm or less needs to be reserved at the bottom of the circuit board to complete the installation and meet the installation strength requirements of the circuit board 2 on the outer shell 3.

[0028] In this utility model, the insulating bracket is made of plastic insulation, which eliminates the need for excessive safety clearance and reduces the space occupied on the board. It has no threads or other structures, making it simple in structure and easy to install. It does not require excessive space at the bottom of the circuit board, which helps to reduce the product size. It does not protrude from the outer surface of the housing, saving product space. In addition, the PCB board is axially limited on the bracket body 11 by the extrusion deformation of the elastic limiting sleeve. The fixing method is reliable and can absorb the impact transmitted from the housing to the PCB board, resulting in strong impact resistance.

[0029] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be regarded as limitations on this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model. These improvements and modifications should also be regarded as the protection scope of this utility model. No further examples will be given here. The protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An insulating support, the insulating support comprising a support body and a limiting sleeve, characterized in that: The bracket body is successively provided with a "Y-shaped" buckle, a middle column and a stop step from top to bottom, and the bracket body is integrally formed; the limiting sleeve is sleeved on the middle column and is in interference fit with the middle column.

2. The insulating bracket according to claim 1, characterized in that: After the insulating bracket is installed, clamping forces will be generated on the circuit board and the housing between the "Y-shaped" buckle and the limiting sleeve and between the limiting sleeve and the stop step respectively.

3. The insulating bracket according to claim 1, characterized in that: The radial circumscribed circle dimension of the stop step is larger than the radial circumscribed circle dimension of the middle column.

4. The insulating bracket according to claim 1, characterized in that: After the insulating bracket is installed, the height of the limiting sleeve is less than or equal to 3.5 mm.

5. The insulating bracket according to claim 1, characterized in that: The inner parts of the ends of the elastic arms on both sides of the "Y-shaped" buckle extend along the axial direction of the bracket body towards the middle column to form limiting flanges.

6. The insulating bracket according to claim 1, characterized in that: The material of the bracket body is insulating plastic.

7. The insulating bracket according to claim 1, characterized in that: The material of the limiting sleeve is an elastic material.

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