CN220210817U - PCBA board fixing assembly and household appliance - Google Patents

Abstract

The embodiment of the application discloses a PCBA board fixed subassembly and domestic appliance, including pre-buried box, second PCBA board, second fixed column and first screw fastener, pre-buried box has holding chamber and locates the screw hole at the bottom of the holding chamber, and the chamber bottom sets up immediately and is fixed with the first fixed column that can be used for installing first PCBA board; the second PCBA board is provided with a through hole penetrating through the upper surface and the lower surface of the second PCBA board; the second fixing column is arranged independently of the embedded box, is arranged in the accommodating cavity and is positioned between the cavity bottom of the accommodating cavity and the second PCBA, and is provided with a through hole penetrating along the axis direction; the first threaded fastener forms a shaft hole fit with the through hole and forms a thread fit with the threaded hole. Through setting up with the first fixed column of pre-buried box chamber end fixed connection to and set up the second fixed column that sets up independently with the pre-buried box, make this pre-buried box not only can be used for installing first PCBA board, also can be used for installing second PCBA board.

Description

PCBA board fixing assembly and household appliance

Technical Field

The utility model relates to the technical field of household appliances, in particular to a PCBA board fixing assembly applied to a household appliance and the household appliance.

Background

At present, household appliance manufacturers are provided with PCBA boards with different sizes aiming at household appliances of different types, and meanwhile, different embedded boxes are provided for the PCBA boards with different sizes, and the same embedded box is difficult to adapt to the PCBA boards with different sizes. For the board card manufacturer, the public PCBA board card is generally popularized to the household appliance manufacturer, so that the public board card with uniform size specification can be suitable for different types of household appliances of different household appliance manufacturers. However, the self PCBA board card of the household appliance manufacturer is integrated with more functions and has larger volume, and the public version PCBA board card provided by the board card manufacturer has smaller volume, if the self PCBA board card and the public version board card are required to be simultaneously matched on the same embedded box, the board card mounting structure on the embedded box needs to be greatly adjusted, and then the die of the embedded box needs to be adjusted, and longer adjustment time and larger adjustment cost are required; if the embedded box is not adjusted, the specification of the public board card needs to be adjusted according to the requirements of different manufacturers, so that the board card manufacturers cannot realize the pushing plan of the public board card. Accordingly, there is a need to provide a new PCBA board securing assembly.

Disclosure of Invention

The embodiment of the application provides a PCBA board fixing assembly capable of adapting to PCBA boards of various sizes and a household appliance.

The embodiment of the application provides a PCBA board fixed subassembly, include:

the embedded box is provided with a containing cavity and a threaded hole arranged at the bottom of the containing cavity, the threaded hole is communicated with the containing cavity, and a first fixing column capable of being used for installing a first PCBA board is vertically arranged and fixed at the bottom of the containing cavity;

the second PCBA board is arranged in the accommodating cavity and is provided with an upper surface and a lower surface which are oppositely arranged, and a through hole is formed through the upper surface and the lower surface;

the second fixing column is independent of the embedded box, is arranged in the accommodating cavity and is positioned between the cavity bottom and the second PCBA board, and is provided with a through hole penetrating along the axis direction; the method comprises the steps of,

and the first threaded fastener is matched with the through hole and the shaft hole, and is in threaded fit with the threaded hole.

In some embodiments, the second fixing column comprises a first central column and at least one cantilever-shaped buckle arranged on the outer wall surface of the first central column, the through hole penetrates through the first central column, the first central column is located between the cavity bottom and the second PCBA board, and the buckle is connected with the second PCBA board in a buckle mode.

In some embodiments, the buckle includes a connection portion, a first clamping portion and a second clamping portion, one end of the first clamping portion is connected with the outer wall surface, the other end of the first clamping portion is connected with the lower end of the connection portion, the second clamping portion is connected with the upper end of the connection portion, the first clamping portion abuts against or has a gap with the lower surface of the second PCBA board, and the second clamping portion clamps the upper surface of the second PCBA board above.

In some embodiments, each second fixing post includes two buckles, the two buckles are distributed at intervals in a circumferential direction around an axis of the second fixing post, one connecting portion of each buckle faces a first side surface of the second PCBA board, the other connecting portion of each buckle faces a second side surface of the second PCBA board, the first side surface and the second side surface are located between the upper surface and the lower surface, and the first side surface and the second side surface are connected and are disposed at an included angle.

In some embodiments, the second fixing post includes at least three clips, each of which is spaced apart in a circumferential direction around an axis of the second fixing post, and the second PCBA board is provided with at least one clip hole penetrating the upper surface and the lower surface, and the connection portion of at least one clip penetrates the clip hole corresponding thereto.

In some embodiments, the second fixing post further comprises a second center post, the second center post is located above the first center post, the through hole penetrates through the second center post, and the second center post and the through hole form shaft hole matching.

In some embodiments, the first and second center posts are coaxial and the junction of the two forms a step surface that abuts the lower surface of the second PCBA board.

In some embodiments, the first threaded fastener is a clearance fit with both the via and the through hole, the head of the first threaded fastener abutting the upper surface of the second PCBA board; or alternatively, the first and second heat exchangers may be,

the head of the first threaded fastener is abutted with the embedded box, and the first threaded fastener is tightly matched with the through hole.

In some embodiments, the PCBA plate securing assembly further includes a retaining ring secured to the cavity bottom and surrounding the threaded hole, the retaining ring coaxial with the threaded hole, the retaining ring wrapping the bottom of the second securing post.

A household appliance comprising the PCBA board securing assembly.

The beneficial effects are that: through setting up with the first fixed column of pre-buried box chamber end fixed connection, and set up the second fixed column that sets up independently with pre-buried box, make this pre-buried box not only can be used for installing first PCBA board, also can be used for installing second PCBA board, and then be convenient for the household electrical appliances producer select the mounting panel card, also be convenient for the card producer utilize this structure to promote public version use of board card.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded perspective view of a PCBA board securing assembly in accordance with an embodiment of the present application;

FIG. 2 is a schematic front view of a PCBA board securing assembly in accordance with an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic front view of a second PCBA board assembled with a second mounting post in accordance with an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of FIG. 4 taken along line B-B;

fig. 6 is a schematic perspective view of a second fixing post according to an embodiment of the present application;

fig. 7 is a schematic front view of a second fixing post according to an embodiment of the present application.

Reference numerals illustrate: 100. a PCBA board fixing assembly; 1. embedding a box; 11. a receiving chamber; 12. a cavity bottom; 13. a threaded hole; 14. a first fixing column; 2. a second PCBA board; 21. an upper surface; 22. a lower surface; 23. a via hole; 24. a first side surface; 25. a second side surface; 3. a second fixing column; 31. a through hole; 32. a first center post; 321. a step surface; 322. a first through hole; 33. a buckle; 331. a connection part; 332. a first clamping part; 333. a second clamping part; 34. a second center post; 341. a second through hole; 4. a first threaded fastener; 41. a head; 42. a stem portion; 5. and a positioning ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

As shown in fig. 1 to 7, a PCBA board fixing assembly 100 includes a pre-buried box 1, the pre-buried box 1 includes a receiving cavity 11 and a threaded hole 13 provided at a cavity bottom 12 of the receiving cavity 11, the cavity bottom 12 of the pre-buried box 1 is further provided with a first fixing post 14, and the first fixing post 14 can be used for installing a first PCBA board corresponding thereto. The PCBA board securing assembly 100 further includes a second PCBA board 2, a second securing post 3, and a first threaded fastener 4. The second PCBA board 2 includes an upper surface 21 and a lower surface 22 disposed opposite to each other, the lower surface 22 faces the cavity bottom 12 of the accommodating cavity 11, the upper surface 21 faces away from the cavity bottom 12 of the accommodating cavity 11, a plurality of through holes 23 are formed through the upper surface 21 and the lower surface 22, and the through holes 23 can be used for installing the second PCBA board 2 in the pre-buried box 1. The second fixing column 3 may have one or more, and the second fixing column 3 is provided independently of the pre-buried box 1, and the second fixing column 3 has a through hole 31 penetrating along an axial direction thereof. Each through hole 31 corresponds to one through hole 23 and one threaded hole 13. The first threaded fasteners 4 may have one or more, and each first threaded fastener 4 corresponds to one of the through holes 23, one of the through holes 31, and one of the threaded holes 13.

When in installation, the second fixing column 3 is placed in the accommodating cavity 11, so that the through hole 31 of the second fixing column 3 is aligned and communicated with the corresponding threaded hole 13; placing the second PCBA 2 on the top of the second fixing column 3, so that the through holes 23 of the second PCBA 2 are aligned and communicated with the corresponding through holes 31; the first threaded fastener 4 is inserted into the through hole 23 and the through hole 31 corresponding to the first threaded fastener, and is locked into the threaded hole 13 corresponding to the first threaded fastener, so that the embedded box 1, the second fixing column 3 and the second PCBA 2 are fixedly connected into a whole through the fastening fit of the first threaded fastener 4 and the threaded hole 13.

Through setting up the first fixed column 14 with pre-buried box 1 chamber end 12 fixed connection, and set up the second fixed column 3 that independently sets up with pre-buried box 1, make this pre-buried box 1 not only can be used for installing first PCBA board, also can be used for installing second PCBA board 2. The first PCBA board and the second PCBA board 2 may be different in shape and size, and in an example, the size of the first PCBA board may be larger than the size of the second PCBA board 2, and the first PCBA board is a board card owned by a household appliance manufacturer, and the second PCBA board 2 is a public board PCBA board card pushed by a board card manufacturer. For the PCBA board card needing to be pushed, the adaptation and installation of the PCBA board card can be realized by only slightly changing the pre-buried box 1 by arranging the threaded holes 13 and the like, so that a board card manufacturer can push the PCBA board card onto a product and a whole machine which are produced in a large quantity by a household appliance manufacturer; meanwhile, the household appliance manufacturer can select to install the own board card or the public board card according to the requirement.

The second PCBA boards 2 may be all mounted to the pre-buried box 1 through the second fixing columns 3, and the mounting space defined by each second fixing column 3 may be located in the mounting space defined by each first fixing column 14. For example, four through holes 23 are formed in four corners of the second PCBA board 2, four second fixing columns 3 are formed, and each second fixing column 3 corresponds to one through hole 23; the embedded box 1 is provided with four threaded holes 13, and each threaded hole 13 corresponds to one second fixing column 3; four first threaded fasteners 4 are arranged, each first threaded fastener 4 corresponds to one second fixing column 3, and each first threaded fastener 4 is used for fixing the second PCBA board 2 in the accommodating cavity 11 of the embedded box 1 through the corresponding second fixing column 3. When the first PCBA board is required to be installed, the second PCBA board 2 is removed and all the second fixing posts 3 are removed, and the first PCBA board is fixed to the first fixing posts 14 by the second screw fasteners.

The second PCBA board 2 may be mounted in the pre-buried box 1 by at least one first fixing post 14 and at least one second fixing post 3. In an exemplary structure, four through holes 23 are formed at four corners of the second PCBA board 2, two through holes 23 correspond to two first fixing columns 14, the other two through holes 23 correspond to two second fixing columns 3, the second PCBA board 2 is installed and fixed in the accommodating cavity 11 of the pre-buried box 1 through the first threaded fastener 4, the threaded hole 13 of the pre-buried box 1 is locked through the second fixing columns 3, and the first fixing column 14 is locked through the second threaded fastener. When the first PCBA board needs to be mounted, the second PCBA board 2 is removed and all the second fixing posts 3 are removed, and the four corners of the first PCBA board 2 are respectively fixed to the four first fixing posts 14 by the second screw fasteners. In another example structure, four through holes 23 are provided at four corners of the second PCBA board 2, one through hole 23 corresponding to one first fixing post 14, and the other three through holes 23 corresponding to three second fixing posts 3. Because in the above structure, the second PCBA board 2 can use one or more existing first fixing columns 14 for installation, the number of the second fixing columns 3 can be effectively reduced, and thus the installation cost can be effectively reduced.

In this embodiment, the first fixing post 14 is vertically fixed to the bottom 12 of the accommodating cavity 11, and the first fixing post 14 may be fixed to the bottom 12 by bonding, injection molding, 3D printing, or the like. The second fixing columns 3 are independent of the embedded boxes 1, so that when the second PCBA board 2 is installed, the second fixing columns 3 and the threaded holes 13 are required to be in one-to-one correspondence and vertically arranged.

In this embodiment, the first threaded fastener 4 forms a shaft hole fit with the through hole 23 of the second PCBA board 2, forms a shaft hole fit with the through hole 31 of the second fixing post 3, and forms a threaded fit with the threaded hole 13 of the pre-buried box 1. In general, the first threaded fastener 4 and its corresponding via 23 may form a clearance fit, and the first threaded fastener 4 and its corresponding through hole 31 may form a clearance fit or a tight fit. In an exemplary structure, the first threaded fastener 4 is locked into the threaded hole 13 of the pre-buried box 1 from top to bottom, in this structure, the first threaded fastener 4 sequentially passes through the through hole 23 of the second PCBA board 2 and the through hole 31 of the second fixing post 3 and then is locked into the threaded hole 13 of the pre-buried box 1, and the first threaded fastener 4 can be in clearance fit with the corresponding through hole 23 and through hole 31, so that the pre-buried box 1, the second fixing post 3 and the second PCBA board 2 are fixedly connected into a whole through the first threaded fastener 4. In another example structure, the first threaded fastener 4 is locked into the threaded hole 13 of the pre-buried box 1 from bottom to top, in this structure, the first threaded fastener 4 sequentially passes through the threaded hole 13 of the pre-buried box 1 and the through hole 31 of the second fixing post 3 and then penetrates into the through hole 23 of the second PCBA board 2, the first threaded fastener 4 can be tightly matched with the corresponding through hole 31, for example, the aperture of the through hole 31 can be slightly smaller than the outer diameter of the first threaded fastener 4, and the second fixing post 3 is detachably and fixedly connected with the second PCBA board 2.

In some embodiments, the second fixing post 3 includes a first central post 32 and a cantilever-shaped buckle 33 disposed on an outer wall surface of the first central post 32, the through hole 31 penetrates through the first central post 32 up and down, the bottom of the first central post 32 is supported on the cavity bottom 12, the top of the first central post 32 supports the second PCBA board 2, and the buckle 33 is in buckle connection with the second PCBA board 2, so that the second fixing post 3 and the second PCBA board 2 are detachably and fixedly connected. The buckle 33 may include a connection portion 331, a first clamping portion 332 and a second clamping portion 333, where the connection portion 331 is vertically disposed along the axial direction of the second fixing column 3, the first clamping portion 332 is horizontally extended, one end of the first clamping portion 332 is connected with the outer wall surface of the first center column 32, the other end of the first clamping portion 332 is connected with the lower end of the connection portion 331, and the second clamping portion 333 is connected with the upper end of the connection portion 331, so that the buckle 33 is generally C-shaped as a whole. The buckle 33 has elasticity, and in the axial direction of the second fixing post 3, the distance between the first clamping portion 332 and the second clamping portion 333 may be slightly smaller than the thickness of the second PCBA board 2.

The second PCBA board 2 has two first side surfaces 24 disposed opposite and two second side surfaces 25 disposed opposite, each of the first side surfaces 24 and the second side surfaces 25 being located between the upper surface 21 and the lower surface 22. Adjacent first side surface 24 and second side surface 25 are disposed at an angle, and via 23 is disposed in a corner space formed between first side surface 24 and second side surface 25, i.e., via 23 is disposed adjacent first side surface 24 and second side surface 25, and first side surface 24 and second side surface 25 are connected and perpendicular to each other, as an example.

The second fixing column 3 may be disposed corresponding to the first side surface 24, the first center column 32 of the second fixing column 3 abuts against the lower surface 22 of the second PCBA board 2, the connecting portion 331 of the second fixing column is opposite to the first side surface 24 of the second PCBA board 2, a movable gap may be formed between the first fixing column and the second fixing column, the first clamping portion 332 may abut against the lower surface 22 of the second PCBA board 2, and the second clamping portion 333 may clamp the upper surface 21 of the second PCBA board 2, so as to achieve the snap connection between the snap 33 of the second fixing column 3 and the second PCBA board 2. The second fixing post 3 may also be disposed corresponding to the second side surface 25, where the first center post 32 of the second fixing post 3 abuts against the lower surface 22 of the second PCBA board 2, the connection portion 331 of the second fixing post is opposite to the second side surface 25 of the second PCBA board 2, and a movable gap may be formed between the second side surface 25 and the second side surface, the first clamping portion 332 may abut against the lower surface 22 of the second PCBA board 2, and the second clamping portion 333 may clamp the upper surface 21 of the second PCBA board 2, so as to implement a snap connection between the second fixing post 3 and the second PCBA board 2.

Through setting up second fixed column 3, make second fixed column 3 can with the first side surface 24 side and/or second side surface 25 side buckle connection of second PCBA board 2, realize the detachable fixed connection between second fixed column 3 and the second PCBA board 2.

In some embodiments, the second fixing post 3 includes a first central post 32 and two buckles 33, the first central post 32 has a through hole 31 penetrating up and down, and the two buckles 33 are both connected with the second PCBA board 2 in a buckling manner. Each buckle 33 includes a connection portion 331, a first clamping portion 332 and a second clamping portion 333, the connection portion 331 is vertically arranged, the first clamping portion 332 is connected with the outer wall surface of the first center column 32 and the lower end of the connection portion 331, and the second clamping portion 333 is connected with the upper end of the connection portion 331. The first clamping portions 332 of the two buckles 33 may be perpendicular to each other, the connecting portions 331 of the two buckles 33 may be perpendicular to each other, and the second clamping portions 333 of the two buckles 33 may be perpendicular to each other.

When the first fixing column 3 is installed, the second fixing column 3 is positioned between the cavity bottom 12 of the accommodating cavity 11 and the second PCBA board 2, the bottom end of the first central column 32 is abutted with the cavity bottom 12 of the accommodating cavity 11, and the top end of the first central column 32 is abutted with the lower surface 22 of the second PCBA board 2; of the two buckles 33, the connecting portion 331 of one buckle 33 is opposite to the first side surface 24 of the second PCBA board 2, the first clamping portion 332 of the buckle 33 is abutted against the lower surface 22 of the second PCBA board 2, and the second clamping portion 333 of the buckle 33 is on the upper surface 21 of the second PCBA board 2 of Fang Kazhu; the connecting portion 331 of the other buckle 33 faces the second side surface 25 of the second PCBA board 2, the first engaging portion 332 of the buckle 33 abuts against the lower surface 22 of the second PCBA board 2, and the second engaging portion 333 of the buckle 33 is located on the upper surface 21 of the second PCBA board 2 Fang Kazhu. Through set up two buckles 33 on same second fixed column 3, can be in two directions and the buckle of second PCBA board 2 is connected, make the connection between second fixed column 3 and the second PCBA board 2 more firm.

In this embodiment, for each second fixing post 3, the connection portion 331 of each buckle 33 faces the side surface of the second PCBA board 2, and a certain clearance is provided between the connection portion 331 and the corresponding side surface. In an alternative structure, the second fixing post 3 includes a first central post 32 and at least three clips 33, and each clip 33 may be spaced apart in a circumferential direction around the axis of the second fixing post 3. Of all the clips 33, the connection portion 331 in which one clip 33 may be located is located outside the side surface of the second PCBA board 2; there may be a buckle 33 passing through the second PCBA board 2, and correspondingly, the second PCBA board 2 has a hole penetrating through the upper surface 21 and the lower surface 22 thereof, the hole corresponds to the buckle 33, the connection portion 331 of the buckle 33 is located in the hole, and the second clamping portion 333 of the buckle 33 passes through the hole upwards and clamps the hole edge of the hole above.

In this embodiment, each second fixing post 3 of the PCBA board fixing assembly 100 may have at least two clips 33. In an alternative construction, of all the second fixing legs 3, some of the second fixing legs 3 have at least two catches 33 and some of the second fixing legs 3 have one catch 33. For the second fixing posts 3 having only one buckle 33, some of the second fixing posts 3 are disposed corresponding to the first side surface 24 of the second PCBA board 2, and some of the second fixing posts 3 are disposed corresponding to the second side surface 25 of the second PCBA board 2. For each second fixing post 3, the first central post 32 may abut against the lower surface 22 of the second PCBA board 2, and the first engagement portion 332 of the buckle 33 may abut against or have a gap with the lower surface 22 of the second PCBA board 2.

In some embodiments, the second fixing post 33 includes a first central post 32, a second central post 34, and two buckles 33, the second central post 34 is disposed on top of the first central post 32, the outer diameter of the second central post 34 may be smaller than the outer diameter of the first central post 32, the junction between the second central post 34 and the first central post 32 forms a step surface 321, the step surface 321 can abut against the lower surface 22 of the second PCBA board 2, the second central post 34 is matched with the through hole 23 of the second PCBA board 2, the two buckles 33 are both cantilever-shaped on the outer wall surface of the first central post 32, and the two buckles 33 are staggered by a preset angle in the circumferential direction around the axis of the second fixing post 3, for example, the two buckles 33 are staggered by 90 degrees, so that one buckle 33 is in snap fit with one side of the second PCBA board 2 having the first side surface 24, and the other buckle 33 is in snap fit with one side of the second PCBA board 2 having the second side surface 25.

When the second fixing columns 3 are installed, the second fixing columns 3 are vertically arranged at the threaded holes 13 of the cavity bottom 12 of the accommodating cavity 11, the step surfaces 321 of the second fixing columns 3 are in contact with the lower surface 22 of the second PCBA board 2, the second center columns 34 of the second fixing columns 3 penetrate into the through holes 23 of the second PCBA board 2, the connecting parts 331 are opposite to the first side surface 24 or the second side surface 25 of the second PCBA board 2 on the outer side, the first clamping parts 332 are in contact with the lower surface 22 of the second PCBA board 2, and the second clamping parts 333 are in contact with the upper surface 21 of the second PCBA board 2 on the upper Fang Kazhu. By arranging the second center column 34, accurate positioning of the second PCBA 2 on the second fixed column 3 is realized; by providing two buckles 33, a secure connection of the second fixing post 3 and the second PCBA board 2 is achieved.

The shape of the second central post 34 may be matched with the shape of the via hole 23 of the second PCBA board 2, the shape of the via hole 23 may be a circle or a polygon, and correspondingly, the shape of the second central post 34 may also be a circle or a polygon, and the shapes of the second central post 34 and the via hole 23 are not limited. The outer diameter of the second central post 34 matches the aperture of the via 23 of the second PCBA board 2, which may be equal to or slightly smaller than the aperture. The second central post 34 has an inner diameter that matches the outer diameter of the first threaded fastener 4, which may be slightly larger than the outer diameter.

In the axial direction of the second fixing column 3, the height of the second center column 34 may be not greater than the depth of the through hole 23, so that the head of the first threaded fastener 4 may be tightly pressed against the upper surface 21 of the second PCBA board 2, thereby facilitating the fastening of the embedded box 1, the second fixing column 3 and the second PCBA board 2 into a whole. In some alternative arrangements, the height of the second central post 34 may also be greater than the depth of the via 23, such that the head of the first threaded fastener 4 is pressed against the end face of the second central post 34, in which arrangement the second fixing post 3 and the second PCBA board 2 are secured by a snap-fit connection.

The through hole 31 of the second fixing post 3 may include a first through hole 322 penetrating the first center post 32 up and down, and a second through hole 341 penetrating the second center post 34 up and down, and the first through hole 322 and the second through hole 341 penetrating to constitute the through hole 31. The aperture of the second through hole 341 may be equal to or slightly smaller than the aperture of the first through hole 322, and the depth of the second through hole 341 may be smaller than the depth of the first through hole 322, i.e., the height of the second center pillar 34 may be smaller than the height of the first center pillar 32. The height of the first center post 32 can be determined according to the depth of the accommodating cavity 11 of the pre-buried box 1.

The first threaded fastener 4 includes a head 41 and a shank 42, the head 41 having an outer diameter larger than that of the shank 42, and the shank 42 being threaded. During assembly, the rod portion 42 can penetrate through the through hole 23 of the second PCBA board 2 and the through hole 31 of the second fixing column 3 and be locked into the threaded hole 13 of the embedded box 1. The head 41 may be pressed against the upper surface 21 of the second PCBA board 2.

In some embodiments, the PCBA board securing assembly 100 further comprises a retaining ring 5, the retaining ring 5 being secured to the bottom 12 of the housing cavity 11, the retaining ring 5 surrounding the threaded hole 13, and the retaining ring 5 being coaxial with its corresponding threaded hole 13. The positioning ring 5 has a certain height in the axial direction of the second fixing post 3. During installation, the locating ring 5 wraps the bottom of the second fixing column 3, so that the coaxial line of the through hole 31 of the second fixing column 3 and the threaded hole 13 of the embedded box 1 can be ensured.

A household appliance comprising the above PCBA board securing assembly 100. The household appliance can selectively install the first PCBA board and the second PCBA board 2 according to the requirement. The first PCBA board may be larger in size than the second PCBA board 2, the second PCBA board 2 may be provided by a board card manufacturer, and the first PCBA board may be provided by the home appliance manufacturer itself. For the household appliance, the embedded box 1 is only required to be simply provided with the threaded hole 13, and the second PCBA board 2 can be installed and fixed in the embedded box 1 through the additionally arranged second fixing column 3, so that the embedded box 1 can be used for selectively installing the first PCBA board or the second PCBA board 2 according to the use requirement.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A PCBA board securing assembly, comprising:

the embedded box is provided with a containing cavity and a threaded hole arranged at the bottom of the containing cavity, the threaded hole is communicated with the containing cavity, and a first fixing column capable of being used for installing a first PCBA board is vertically arranged and fixed at the bottom of the containing cavity;

the second PCBA board is arranged in the accommodating cavity and is provided with an upper surface and a lower surface which are oppositely arranged, and a through hole is formed through the upper surface and the lower surface;

the second fixing column is independent of the embedded box, is arranged in the accommodating cavity and is positioned between the cavity bottom and the second PCBA board, and is provided with a through hole penetrating along the axis direction; the method comprises the steps of,

and the first threaded fastener is matched with the through hole and the shaft hole, and is in threaded fit with the threaded hole.

2. The PCBA board securing assembly as recited in claim 1, wherein the second securing post includes a first center post and at least one cantilever-like clip disposed on an outer wall surface of the first center post, the through hole extending through the first center post, the first center post being located between the cavity bottom and the second PCBA board, the clip being in clip connection with the second PCBA board.

3. The PCBA board securing assembly as recited in claim 2, wherein the buckle includes a connection portion, a first clamping portion and a second clamping portion, one end of the first clamping portion being connected to the outer wall surface, the other end of the first clamping portion being connected to a lower end of the connection portion, the second clamping portion being connected to an upper end of the connection portion, the first clamping portion being in abutment with or having a gap from the lower surface of the second PCBA board, the second clamping portion clamping the upper surface of the second PCBA board above.

4. A PCBA board securing assembly as recited in claim 3, wherein each of the second securing posts includes two of the clips spaced apart in a circumferential direction about an axis of the second securing post, wherein one of the clip's connection portions is directly opposite a first side surface of the second PCBA board and the other clip's connection portion is directly opposite a second side surface of the second PCBA board, the first side surface and the second side surface both being located between the upper surface and the lower surface, the first side surface and the second side surface being connected and disposed at an included angle.

5. A PCBA board securing assembly according to claim 3, wherein the second securing post includes at least three of the clips, each of the clips being spaced apart in a circumferential direction about an axis of the second securing post, the second PCBA board being provided with at least one clip aperture extending through the upper and lower surfaces, the connecting portion of at least one of the clips passing through the clip aperture corresponding thereto.

6. The PCBA board securing assembly of claim 2, wherein the second securing post further comprises a second center post, the second center post being located above the first center post, the through hole extending through the second center post, the second center post forming a shaft hole fit with the through hole.

7. The PCBA board securing assembly of claim 6, wherein the first and second center posts are coaxial and the junction of the two forms a step surface that abuts a lower surface of the second PCBA board.

8. The PCBA plate fixation assembly of claim 1, wherein the first threaded fastener is clearance fit with both the via and the through hole, a head of the first threaded fastener abutting an upper surface of the second PCBA plate; or alternatively, the first and second heat exchangers may be,

the head of the first threaded fastener is abutted with the embedded box, and the first threaded fastener is tightly matched with the through hole.

9. The PCBA board securing assembly of claim 1, further comprising a retaining ring secured to the cavity bottom and surrounding the threaded hole, the retaining ring and the threaded hole being coaxial, the retaining ring wrapping the bottom of the second securing post.

10. A household appliance comprising the PCBA board securing assembly of any one of claims 1-9.