Fixing structure of PCB (printed circuit board) of gas water heater

Abstract

The utility model discloses a gas water heater PCB fixing structure which comprises a substrate box and a PCB arranged in the substrate box, two sides of the substrate box are respectively provided with a buckle structure used for fixing the PCB, and the periphery of the substrate box is provided with a plurality of pairs of positioning structures used for positioning the PCB. And colloid is arranged on the outer surface and the outer edge of the PCB. According to the utility model, the PCB is fixed through the buckle structure, screws are not needed, the effective utilization rate, the production efficiency and the reliability of the PCB are improved to a certain extent, the PCB is waterproof by injecting the colloid, a waterproof rear cover which must be matched with the PCB is not needed, and the universality is relatively strong.

Description

Technical Field

[0001] The utility model relates to the technical field of PBC boards, in particular to a fixing structure of a PCB board of a gas water heater. Background Art

[0002] PCB is the control center of home appliances. As a precision electronic component, it requires a waterproof, moisture-proof and anti-interference working environment. Therefore, when the PCB is installed inside the home appliance, it must be considered that it can be independently protected and waterproof to prevent damage to the electronic components and affect the use function.

[0003] like Figure 1 As shown, an existing PCB board 2 is generally fixed in a dedicated substrate box 1 by screws 4. For the purpose of waterproofing, the fixing structure generally also adds a waterproof back cover 3, which covers the surface of the PCB board 2.

[0004] The prior art PCB board 2 fixing structure mainly has the following problems:

[0005] 1. Fixing the PCB board 2 by screwing 4 requires firstly reserving screw hole positions on the PCB board 2, which occupies the layout space of the PCB board 2 and reduces the effective utilization rate of the PCB board 2; secondly, additional automation equipment is required, and screw 4 screening equipment and automatic screw 4 equipment are added, and the production efficiency is also low; and there is a risk of the screw 4 loosening and falling off and accidentally damaging the electronic components 5 when screwing 4, which reduces the reliability of assembly.

[0006] 2. For the layout of different PCB boards 2, the waterproof back cover 3 must be customized according to the appearance of its electronic components 5, resulting in poor versatility and virtually increasing the variety of materials and inventory management pressure.

[0007] Therefore, how to optimize the fixing structure of the PCB board to avoid the problems caused by the screw fixing method and the problem that the waterproof back cover needs to be customized and has poor versatility has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0008] In view of the above-mentioned defects of the prior art, one purpose of the present invention is to improve the effective utilization rate, production efficiency and assembly reliability of PCB boards; another purpose is to improve the versatility of the waterproof structure of PCB boards.

[0009] In order to achieve the above technical objectives, the utility model provides a fixing structure of a PCB board of a gas water heater, comprising a substrate box and a PCB board arranged in the substrate box, wherein two sides of the substrate box are respectively provided with snap structures for fixing the PCB board, and a plurality of pairs of positioning structures for positioning the PCB board are arranged around the circumference;

[0010] Colloid is arranged on the outer surface and outer edge of the PCB board.

[0011] Preferably, at least one pair of the buckle structures is provided, and each pair of the buckle structures is symmetrically arranged with respect to the substrate box;

[0012] Preferably, the positioning structures are provided in a plurality of pairs, and each pair of the positioning structures are arranged symmetrically with respect to the substrate box.

[0013] Preferably, the colloid is an anaerobic adhesive.

[0014] Beneficial effects of the utility model:

[0015] 1. Due to the above structural design, the utility model fixes the PCB board through the snap-fit ​​structure without using screws, which improves the effective utilization rate of the PCB board layout space, production efficiency and assembly reliability to a certain extent.

[0016] 2. The utility model waterproofs the PCB board by injecting colloid, and does not need to use a waterproof back cover that must be compatible with the PCB board, thereby improving the versatility of the waterproof back cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art;

[0018] Figure 2 It is a structural schematic diagram of the utility model in a front view;

[0019] Figure 3 It is a schematic diagram of the structure of the utility model from a top view.

[0020] In the figure: 1 substrate box, 2 PCB board, 3 waterproof back cover, 4 screws, 5 electronic components, 6 snap-on structure, 7 positioning structure, 8 colloid. DETAILED DESCRIPTION

[0021] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0022] Example:

[0023] like Figure 2-Figure 3 As shown, a specific embodiment of the fixing structure of the PCB board of the gas water heater of the utility model includes a substrate box 1 and a PCB board 2 arranged in the substrate box 1, wherein two sides of the substrate box 1 are provided with snap structures 6 for fixing the PCB board 2, and a plurality of pairs of positioning structures 7 for positioning the PCB board 2 are arranged around.

[0024] Colloid 8 is arranged on the outer surface and outer edge of the PCB board.

[0025] The main innovations of the utility model are: the snap-fit ​​structure 6 and the positioning structure 7 are used to fix the PCB board 2, without screws; the colloid 8 is used for waterproofing, without the need for a waterproof back cover; and the assembly reliability of the PCB board 2 is improved.

[0026] In this embodiment, two pairs of snap structures 6 are provided to fix the PCB board 2 , and each pair of snap structures 6 is symmetrically arranged about the center of the substrate box 1 .

[0027] Three pairs of positioning structures 7 are provided, and each pair of positioning structures 7 is symmetrically arranged about the center of the substrate box 1 ; this facilitates the positioning of the PCB board 2 when the PCB board 2 is installed.

[0028] Furthermore, the utility model cancels the design of the waterproof back cover and adopts the colloid 8 for waterproofing. The colloid 8 is an anaerobic adhesive (such as a two-component anaerobic adhesive or a silica gel, etc.), which can not only ensure the waterproof reliability of the electronic circuit of the PCB board 2, but also further tighten the installation of the PCB board 2, thereby ensuring the reliability of the PCB board 2 when in use.

[0029] In summary, the utility model eliminates two materials, namely, the fastening screws and the waterproof back cover. Firstly, it achieves optimization in terms of material inventory management. In particular, there is no need to specially design a special waterproof back cover according to different layouts and sizes of the PCB board 2, which greatly reduces the types of materials. Secondly, the fastening method of screw fastening, which has reliability risks, is eliminated and replaced with a fixing method of a snap-on structure 6 plus a colloid 8. The reliability of product use is greatly improved, and the automated operability during product assembly and production is also greatly improved. Finally, since there is no need to drive screws, the screw base structure on the substrate box 1 is eliminated, which further reduces the size and thickness of the product. The elimination of the reserved screw holes on the PCB board 2 also makes the layout of electronic components on the PCB board more free and reasonable.

[0030] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A fixing structure of a PCB board of a gas water heater, comprising a substrate box and a PCB board arranged in the substrate box, characterized in that: The two sides of the substrate box are respectively provided with buckle structures for fixing the PCB board, and a plurality of pairs of positioning structures for positioning the PCB board are arranged around the circumference; Colloid is arranged on the outer surface and outer edge of the PCB board.

2. The fixing structure of the PCB board of the gas water heater according to claim 1, characterized in that: At least one pair of the buckle structures is provided, and each pair of the buckle structures is symmetrically arranged with respect to the substrate box.

3. The fixing structure of the PCB board of the gas water heater according to claim 1, characterized in that: The positioning structures are provided in a plurality of pairs, and each pair of the positioning structures is symmetrically arranged with respect to the substrate box.

4. The fixing structure of the PCB board of the gas water heater according to any one of claims 1 to 3, characterized in that: The colloid is an anaerobic glue.

Images