Mounting and sealing structure of a circuit board control box

Abstract

The utility model belongs to control box technical field, especially related to a kind of installation sealing structure of circuit board control box, including: casing, including article chamber and opening;Cover plate, detachably installed on the casing for covering article chamber;Sealing element, for flexible material, including the main part of integrated structure, first fixed part and second fixed part, and first fixed part and second fixed part between form have slot, and the side of second fixed part away from slot along X direction is provided with abutting arc piece;Cover plate is also provided with the first installation slot and the second installation slot along Z direction setting, first fixed part is arranged in first installation slot, second fixed part is arranged in first installation slot, and first installation slot and second installation slot between form have insertion male rib, and insertion male rib and slot insertion fit cooperation;The utility model has the beneficial effects that realize the stable sealing installation between cover plate and casing, block outside impurity to enter chamber interior, guarantee the stable work of circuit board.

Description

Technical Field

[0001] This utility model belongs to the field of control box technology, and in particular relates to an installation and sealing structure for a circuit board control box. Background Technology

[0002] Circuit board control boxes are widely used in industrial automation equipment, home appliances, automotive electronic devices, and other fields. They are mainly used to house and install control circuit boards, providing physical protection for internal circuit components, isolating them from external dust, moisture, and corrosive media, and ensuring stable operation of the circuit boards in complex environments. The sealing structure of the control box is the core component ensuring protective performance; its ease of assembly and sealing reliability directly affect the product's production efficiency and overall service life.

[0003] Currently, conventional circuit board control box sealing structures mostly use independent rubber flat gaskets as seals. During assembly, the seal is placed directly on the stepped surface of the housing opening, and then pressed together by the cover plate to achieve a seal. In actual production and assembly, this type of structure has several technical shortcomings: First, the seal lacks a pre-fixed structure, making it prone to displacement, misalignment, or even detachment during cover plate assembly. This requires repeated manual repositioning, resulting in low production and assembly efficiency and a high risk of misalignment leading to seal failure. Second, most sealing structures rely solely on the axial compression between the cover plate and the housing to form a single sealing surface, lacking lateral clearance between the housing sidewall and the cover plate. When the product is subjected to vibration or temperature changes, the sealing performance is easily affected. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a sealing structure for the installation of a circuit board control box, thereby solving the above-mentioned technical problems.

[0005] In view of this, the present invention provides a sealing structure for mounting a circuit board control box, comprising: The housing includes a storage chamber and an opening, the storage chamber being used to mount and place the circuit board; A cover plate, which is detachably mounted on the housing, is used to cover the storage chamber; The sealing element is made of a flexible material and includes an integral main body, a first fixing part and a second fixing part. A slot is formed between the first fixing part and the second fixing part along the Z direction. An abutting arc plate is provided on the side of the second fixing part away from the slot along the X direction. The abutting arc plate is used to abut against the housing along the X direction. The cover plate is also provided with a first mounting groove and a second mounting groove arranged along the Z direction. A first fixing part is disposed in the first mounting groove, and a second fixing part is disposed in the first mounting groove. A plugging protrusion is formed between the first mounting groove and the second mounting groove, and the plugging protrusion and the slot are plugged into each other.

[0006] Furthermore, the first fixing part is provided with a first snap-fit ​​protrusion, which abuts against the inner wall of the first mounting groove; The second fixing part is provided with a second snap-fit ​​protrusion, which abuts against the inner wall of the second mounting groove.

[0007] Furthermore, there are several of both the first and second snap-fit ​​protrusions.

[0008] Furthermore, there are several abutting arc plates, which are arranged linearly along the Z direction.

[0009] Furthermore, the main body is also provided with abutting protrusions, which are used to abut against the housing along the Z direction.

[0010] Furthermore, a stepped groove is provided on the opening edge of the shell, and a positioning protrusion is provided on the cover plate, with the positioning protrusion and the stepped groove being adapted to each other.

[0011] The beneficial effects of this utility model are: 1. The abutting protrusion of the main body of the sealing element contacts the open end face of the housing along the Z-direction and undergoes elastic deformation to form an axial sealing surface; the abutting arc plate on the outer side of the second fixing part contacts the inner sidewall of the housing along the X-direction and undergoes elastic deformation to form a circumferential sealing surface. After the final cover plate is installed in place, the axial and circumferential sealing structures work together to achieve a complete seal of the storage chamber, effectively preventing external impurities from entering the chamber and ensuring the stable operation of the circuit board.

[0012] 2. By utilizing the engagement of the first fixing part and the first mounting groove, the engagement of the second fixing part and the second mounting groove, and the insertion fit between the insertion protrusion and the slot, the seal is pre-installed and fixed on the cover plate, effectively preventing the seal from shifting during the assembly of the cover plate and the housing, and ensuring sealing stability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the control box of this utility model; Figure 2 This is a partial structural cross-sectional view of the control box of this utility model; The markings in the diagram are as follows: 1. Housing; 11. Step groove; 2. Cover plate; 21. First mounting groove; 22. Second mounting groove; 23. Insertion protrusion; 24. Positioning protrusion; 3. Main body; 31. Abutting protrusion; 4. First fixing part; 41. First snap-fit ​​protrusion; 5. Second fixing part; 51. Abutting arc piece; 52. Second snap-fit ​​protrusion; 6. Slot. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0016] Example 1:

[0017] This embodiment provides a sealing structure for mounting a circuit board control box, including: Housing 1, housing 1 includes a storage chamber and an opening, the storage chamber being used to install and place circuit boards; Cover plate 2 is detachably installed on housing 1 and is used to cover the storage chamber; The sealing element is made of flexible material and includes an integral main body 3, a first fixing part 4 and a second fixing part 5. A slot 6 is formed between the first fixing part 4 and the second fixing part 5 along the Z direction. An abutting arc piece 51 is provided on the side of the second fixing part 5 away from the slot 6 along the X direction. The abutting arc piece 51 is used to abut against the housing 1 along the X direction. The cover plate 2 is provided with a first mounting groove 21 and a second mounting groove 22 arranged along the Z direction. The first fixing part 4 is disposed in the first mounting groove 21, and the second fixing part 5 is disposed in the first mounting groove 21. An insertion protrusion 23 is formed between the first mounting groove 21 and the second mounting groove 22, and the insertion protrusion 23 and the slot 6 are inserted and engaged.

[0018] In this technical solution, the housing 1 is the basic load-bearing component of the entire control box. It has a single-sided open box shape, with an enclosed storage chamber inside. The internal space of the storage chamber is used to install and place circuit boards, providing installation space and basic protection for the circuit boards. The open side of the housing 1 forms an opening that communicates with the storage chamber, serving as an operating channel for inserting the circuit boards into the storage chamber. The cover 2 is a plate-shaped component that seals the opening of the housing 1, separating the storage chamber from the external environment. The cover 2 is detachably installed on the open side of the housing 1, facilitating subsequent opening of the cover 2 for inspection and maintenance of the internal circuit boards.

[0019] Furthermore, a stepped groove 11 is provided on the edge of the opening of the housing 1, and a positioning protrusion 24 is provided on the cover plate 2. The positioning protrusion 24 and the stepped groove 11 are adapted to each other. By providing a stepped groove 11 that extends continuously along the circumference of the opening at the edge of the opening of the housing 1, the groove is open to the side facing the cover plate 2. The positioning protrusion 24 on the cover plate 2 is adapted to the stepped groove 11, which is used for positioning and guiding during the installation of the cover plate 2, and at the same time restricts the circumferential displacement of the cover plate 2 after assembly, so as to ensure the installation accuracy of the cover plate 2.

[0020] The sealing element is made of a flexible material capable of elastic deformation, such as rubber. It is positioned between the cover plate 2 and the housing 1 to fill the gap between them, preventing external moisture, dust, and other impurities from entering the storage chamber and achieving a sealing and protective function. The sealing element is an integrally molded structure, including a main body 3, a first fixing part 4, and a second fixing part 5. The first fixing part 4 and the second fixing part 5 are arranged side by side on the side of the main body 3 facing the cover plate 2, with a uniform interval between them. This interval forms a slot 6 extending along the thickness direction of the sealing element.

[0021] The second fixing part 5 has an abutment arc plate 51 on its surface facing away from the slot 6. The abutment arc plate 51 extends along the length of the second fixing part 5 and arches in an arc shape away from the slot 6. When the cover plate 2 and the sealing element are assembled together into the housing 1, the abutment arc plate 51 contacts the inner wall of the housing 1 in the X direction. It undergoes elastic deformation due to the compression of the inner wall of the housing 1, and applies a uniform clamping force to the inner wall of the housing 1 in the opposite direction. This fills the lateral gap between the sealing element and the inner wall of the housing 1, forming a circumferential sealing barrier to prevent external impurities from entering the storage chamber through the lateral gap between the sealing element and the housing 1. Furthermore, there are several abutment arc plates 51 arranged linearly along the Z direction. Multiple abutment arc plates 51 form a multi-layer lateral sealing structure, further improving the reliability of the circumferential seal.

[0022] The main body 3 of the seal has an abutting protrusion 31 on the side facing the housing 1. The abutting protrusion 31 extends continuously along the length of the main body 3 and protrudes towards the housing 1. When the cover plate 2 and the housing 1 are assembled, the main body 3 is clamped between the end face of the cover plate 2 and the open end face of the housing 1. The abutting protrusion 31 contacts the open end face of the housing 1 in the Z direction and undergoes elastic deformation under the pressure of the end face of the housing 1, forming a continuous axial sealing surface. This prevents external moisture and dust from entering the storage chamber from the gap between the end faces of the cover plate 2 and the housing 1. It cooperates with the lateral abutting arc plate 51 to form a bidirectional sealing structure, comprehensively improving the sealing and protection effect of the control box.

[0023] A first mounting groove 21 and a second mounting groove 22 are provided on the side of the cover plate 2 facing the housing 1. Both grooves extend circumferentially along the cover plate 2, and the first mounting groove 21 and the second mounting groove 22 are parallel to each other and spaced apart. An insertion protrusion 23 is naturally formed between the two grooves. The insertion protrusion 23 also extends circumferentially along the cover plate 2 and is used to form an insertion fit with the sealing element to realize the pre-installation and fixation of the sealing element on the cover plate 2.

[0024] The assembly and operation process of this structure is as follows: First, the seal is installed on the cover plate 2, so that the first fixing part 4 is embedded in the first mounting groove 21 and the second fixing part 5 is embedded in the second mounting groove 22. At the same time, the insertion protrusion 23 on the cover plate 2 is inserted into the slot 6 of the seal. Then, the circuit board is inserted into the storage chamber through the opening of the housing 1. Then, the cover plate 2 with the pre-installed seal is aligned with the opening of the housing 1 and installed, so that the positioning protrusion 24 on the cover plate 2 is embedded into the stepped groove 11 of the housing 1, thus completing the alignment and guidance between the cover plate 2 and the housing 1. As the cover plate 2 is gradually pressed together along the Z direction, the abutting protrusion 31 of the sealing body 3 contacts the opening end face of the housing 1 along the Z direction and undergoes elastic deformation to form an axial sealing surface; at the same time, the abutting arc plate 51 on the outer side of the second fixing part 5 contacts the inner side wall of the housing 1 along the X direction and undergoes elastic deformation to form a circumferential sealing surface; finally, after the cover plate 2 is installed in place, the axial and circumferential sealing structures work together to achieve a complete seal of the storage chamber, effectively preventing external impurities from entering the chamber and ensuring the stable operation of the circuit board.

[0025] Furthermore, the first fixing part 4 is provided with a first snap-fit ​​protrusion 41, which abuts against the inner wall of the first mounting groove 21; the second fixing part 5 is provided with a second snap-fit ​​protrusion 52, which abuts against the inner wall of the second mounting groove 22. Through this structural design, when the first fixing part 4 is inserted into the first mounting groove 21, the first snap-fit ​​protrusion 41 undergoes elastic deformation under the pressure of the groove wall, pressing against the inner wall of the first mounting groove 21 in the opposite direction. This contact friction enhances the connection strength between the first fixing part 4 and the first mounting groove 21, preventing the seal from coming out of the first mounting groove 21 during assembly or use. The snap-fit ​​fixing between the second fixing part 5 and the second mounting groove 22 follows the same principle as the snap-fit ​​fixing between the first fixing part 4 and the first mounting groove 21, and will not be described in detail. Furthermore, there are multiple first snap-fit ​​protrusions 41 and multiple second snap-fit ​​protrusions 52. These multiple protrusions are arranged sequentially along the depth direction of the mounting groove, and their combined action further improves the reliability of the snap-fit ​​fixing.

[0026] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A sealing structure for mounting a circuit board control box, characterized in that, include: The housing (1) includes a storage chamber and an opening, the storage chamber being used to install and place circuit boards; Cover plate (2), which is detachably installed on the housing (1) for sealing the storage chamber; The sealing element is made of flexible material and includes an integral main body (3), a first fixing part (4) and a second fixing part (5). A slot (6) is formed between the first fixing part (4) and the second fixing part (5) along the Z direction. An abutting arc piece (51) is provided on the side of the second fixing part (5) away from the slot (6) along the X direction. The abutting arc piece (51) is used to abut against the housing (1) along the X direction. The cover plate (2) is provided with a first mounting groove (21) and a second mounting groove (22) arranged along the Z direction. The first fixing part (4) is disposed in the first mounting groove (21), and the second fixing part (5) is disposed in the first mounting groove (21). A plugging protrusion (23) is formed between the first mounting groove (21) and the second mounting groove (22). The plugging protrusion (23) and the slot (6) are plugged into each other.

2. The mounting and sealing structure of the circuit board control box according to claim 1, characterized in that, The first fixing part (4) is provided with a first snap-fit ​​protrusion (41), and the first snap-fit ​​protrusion (41) abuts against the inner wall of the first mounting groove (21); The second fixing part (5) is provided with a second snap-fit ​​protrusion (52), which abuts against the inner wall of the second mounting groove (22).

3. The mounting and sealing structure of the circuit board control box according to claim 2, characterized in that, There are several of the first snap-fit ​​protrusion (41) and the second snap-fit ​​protrusion (52).

4. The mounting and sealing structure of the circuit board control box according to claim 1, characterized in that, The abutting arc plates (51) are a plurality of each, and are arranged linearly along the Z direction.

5. The mounting and sealing structure of the circuit board control box according to claim 1, characterized in that, The main body (3) is also provided with an abutting protrusion (31), which is used to abut against the shell (1) along the Z direction.

6. The mounting and sealing structure of the circuit board control box according to claim 1, characterized in that, The shell (1) has a stepped groove (11) on the opening edge, and the cover plate (2) has a positioning protrusion (24). The positioning protrusion (24) and the stepped groove (11) are adapted to be connected.

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