阅读说明：本技术 一种电路板防水装配结构及家用电器 (Waterproof assembly structure of circuit board and household appliance ) 是由 李一峰 卢辉明 区宗尹 于 2019-10-15 设计创作，主要内容包括：本发明公开一种电路板防水装配结构及家用电器。其中,防水装配结构包括底壳、支架和面板；底壳上设有围板、由围板所围成的第一安装位、处于围板外侧的第二安装位以及设在第二安装位的第一漏水孔,电路板固定设在第一安装位内；支架上设有至少一个与电路板相配合的配合槽,且支架的下侧面具有位于围板外侧的挡水板,且挡水板的下末端的位置低于围板的上末端的位置；面板与支架的配合槽周侧之间具有密封防水结构。通过对电路板采用挡水结构与导水结构相结合进行装配,能够对电路板起到有效可靠的防水保护作用,整体结构简单且装配操作方便。有利于提高电路板的使用寿命及可靠性。(The invention discloses a waterproof assembly structure of a circuit board and a household appliance. The waterproof assembly structure comprises a bottom shell, a support and a panel; the bottom shell is provided with a coaming, a first mounting position surrounded by the coaming, a second mounting position positioned outside the coaming and a first water leakage hole arranged at the second mounting position, and the circuit board is fixedly arranged in the first mounting position; the bracket is provided with at least one matching groove matched with the circuit board, the lower side surface of the bracket is provided with a water baffle plate positioned on the outer side of the enclosing plate, and the position of the lower tail end of the water baffle plate is lower than the position of the upper tail end of the enclosing plate; and a sealing waterproof structure is arranged between the panel and the periphery of the matching groove of the bracket. The water retaining structure and the water guide structure are combined to assemble the circuit board, so that the circuit board can be effectively and reliably protected from water, and the whole structure is simple, and the assembly and operation are convenient. The service life and the reliability of the circuit board are improved.)

1. A waterproof assembly structure of a circuit board comprises a bottom shell (1), a support (2) detachably mounted on the bottom shell (1) and a panel (3) fixed on the support (2); the novel LED lamp is characterized in that a coaming (11), a first mounting position (12) surrounded by the coaming (11), a second mounting position (13) positioned on the outer side surface of the coaming (11) and a first water leakage hole (17) arranged in the second mounting position (13) are arranged on the bottom shell (1), and the circuit board (4) is fixedly arranged in the first mounting position (12) of the bottom shell (1); the bracket (2) is provided with at least one matching groove matched with the circuit board (4), the lower side surface of the bracket (2) is provided with a water baffle (29) positioned outside the enclosing plate (11), and the position of the lower tail end of the water baffle (29) is lower than the position of the upper tail end of the enclosing plate (11); a sealing and waterproof structure is arranged between the panel (3) and the periphery of the matching groove of the bracket (2).

2. The waterproof mounting structure for circuit board according to claim 1, wherein a gap is provided between the water guard plate (29) and the enclosure plate (11).

3. The waterproof assembly structure of circuit board according to claim 1, wherein the inner sidewall of the bottom case (1) is provided with a plurality of engaging portions (15) having engaging holes, and the lower side of the bracket (2) is provided with a plurality of engaging hooks (27), each engaging hook (27) is engaged in one of the engaging portions (15).

4. The waterproof mounting structure of circuit board according to claim 1, wherein the lower side of the bracket (2) has an outer skirt (201) and an inner skirt (202) located inside the outer skirt (201), and a supporting groove is formed between the outer skirt (201) and the inner skirt (202), and a plurality of supporting brackets (16) are disposed on the inner side wall of the bottom case (1), and the top surfaces of the supporting brackets (16) are connected in the supporting groove in a contacting manner.

5. The waterproof assembly structure of circuit board according to claim 1, wherein the second mounting position (13) is provided with a mounting tube (131), the bracket (2) and the panel (3) are respectively provided with a matching through hole (241) and a panel through hole (31), and the matching through hole (241) and the panel through hole (31) are both located above the mounting tube (131).

6. The waterproof assembly structure of circuit board according to claim 5, wherein the bracket (2) is provided with a water guiding groove (25), the water guiding groove (25) is located outside the matching through hole (241), the end of the water guiding groove (25) is provided with a water guiding hole (26), and the second mounting position (13) is provided with a second water leakage hole (18) communicated with the water guiding hole (26).

7. The waterproof mounting structure for circuit boards according to claim 5, wherein the bottom of the mounting tube (131) is provided with a slanted bottom plate (132), and a third water leakage hole (19) is provided on the lower side of the slanted bottom plate (132).

8. The waterproof assembly structure of circuit board according to claim 1, wherein the waterproof seal structure comprises: a sealing groove (21) arranged on the periphery of the matching groove and a sealing element arranged in the sealing groove (21), wherein the sealing element connects the panel (3) and the bracket (2) in a sealing and waterproof way.

9. The waterproof assembly structure of circuit board according to any one of claims 1 to 8, wherein the waterproof seal structure comprises: and a full circle of waterproof strip (23) is arranged on the periphery of the matching groove, and the panel (3) is connected with the bracket (2) in a sealing and waterproof way through the full circle of waterproof strip (23).

10. A domestic appliance comprising a base, wherein the base has a waterproof mounting structure for a circuit board according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of circuit board assembly, in particular to a waterproof assembly structure of a circuit board and a household appliance implementing the waterproof assembly structure.

background

The existing various household appliances need to use a circuit board, and a plurality of electronic components are loaded on the circuit board to realize various electric control functions of the household appliances. At present, a large amount of glue is generally poured into the bottom shell in the industry, so that the circuit board is wrapped by the glue to realize glue filling and sealing, and water resistance is realized, but the glue filling and sealing waterproof structure is not suitable for all circuit boards. However, when the assembly of the circuit board in the existing household appliance cannot adopt a glue-pouring sealing waterproof structure, the waterproof grade is not high, and the defects of short service life and poor reliability of the product caused by that the circuit board is burnt by water easily enter the water are overcome.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a waterproof assembly structure of a circuit board and a household appliance implementing the waterproof assembly structure, which can provide effective and reliable waterproof protection for the circuit board so as to improve the reliability and prolong the service life.

The invention provides a waterproof assembly structure of a circuit board, which comprises a bottom shell 1, a support 2 and a panel 3, wherein the support 2 is detachably arranged on the bottom shell 1, and the panel 3 is fixed on the support 2; the bottom shell 1 is provided with a coaming 11, a first mounting position 12 surrounded by the coaming 11, a second mounting position 13 positioned on the outer side surface of the coaming 11 and a first water leakage hole 17 arranged at the second mounting position 13, and the circuit board 4 is fixedly arranged in the first mounting position 12 of the bottom shell 1; the bracket 2 is provided with at least one matching groove matched with the circuit board 4, the lower side surface of the bracket 2 is provided with a water baffle 29 positioned outside the enclosing plate 11, and the position of the lower tail end of the water baffle 29 is lower than the position of the upper tail end of the enclosing plate 11; and a sealing and waterproof structure is arranged between the panel 3 and the periphery side of the matching groove of the bracket 2.

Preferably, there is a gap between the splash plate 29 and the shroud 11.

Preferably, the inner sidewall of the bottom case 1 is provided with a plurality of engaging portions 15 having engaging holes, and the lower side surface of the bracket 2 is provided with a plurality of engaging tabs 27, each engaging tab 27 being engaged in one of the engaging portions 15.

Preferably, the lower side of the bracket 2 has an outer skirt 201 and an inner skirt 202 located inside the outer skirt 201, a supporting groove is formed between the outer skirt 201 and the inner skirt 202, a plurality of supporting brackets 16 are disposed on the inner side wall of the bottom case 1, and the top surfaces of the supporting brackets 16 are connected in the supporting groove in a contacting manner.

Preferably, the second mounting position 13 is provided with a mounting tube 131, the bracket 2 and the panel 3 are respectively provided with a matching through hole 241 and a panel through hole 31, and the matching through hole 241 and the panel through hole 31 are both located above the mounting tube 131.

Preferably, the bracket 2 is provided with a water guide groove 25, the water guide groove 25 is positioned outside the matching through hole 241, the end of the water guide groove 25 is provided with a water guide hole 26, and the second mounting position 13 is provided with a second water leakage hole 18 communicated with the water guide hole 26.

Preferably, the bottom of the mounting tube 131 is provided with an inclined bottom plate 132, and a third water leakage hole 19 is formed at a lower side of the inclined bottom plate 132.

Preferably, the waterproof sealing structure includes: a seal groove 21 provided on the peripheral side of the mating groove and a seal member provided in the seal groove 21, and the seal member connects the panel 3 and the bracket 2 to each other in a waterproof manner.

Preferably, the waterproof sealing structure includes: and a full circle of waterproof strip 23 is arranged on the periphery of the matching groove, and the full circle of waterproof strip 23 is used for connecting the panel 3 and the bracket 2 in a sealing and waterproof way.

In addition, the invention discloses a household appliance which comprises a base, wherein the base is provided with the waterproof assembly structure of the circuit board.

Compared with the prior art, the invention has the following beneficial effects:

The waterproof assembly device mainly adopts the combination of the water retaining structure and the water guide structure to realize the waterproof assembly of the circuit board on the premise that the circuit board cannot be thoroughly sealed due to the existence of components for information interaction with the outside, or the consideration of heat dissipation and other reasons, and can play an effective and reliable waterproof protection role on the circuit board in a use state by adopting the combination of the water retaining structure and the water guide structure to assemble the circuit board, and has the advantages of simple integral structure and convenient assembly operation. Moreover, the waterproof assembly structure can be implemented in bases of various household appliances, has a wide implementation range, and is beneficial to improving the service life and reliability of the household appliances.

Drawings

Fig. 1 is an exploded view of the waterproof assembly structure of a circuit board according to the present invention.

Fig. 2 is a schematic view of the structure of the bracket with its underside facing upwards.

Fig. 3 is a schematic structural view of the bottom case.

Fig. 4 is a schematic view of the internal structure of the waterproof assembly structure of the circuit board of the present invention.

The reference symbols in the figures have the following meanings: 1-bottom shell, 11-enclosing plate, 12-first mounting position, 13-second mounting position, 131-mounting cylinder, 132-inclined bottom plate, 14-first stud, 15-buckling part, 16-supporting bracket, 17-first water leakage hole, 18-second water leakage hole, 19-third water leakage hole, 2-bracket, 201-outer skirt plate, 202-inner skirt plate, 21-sealing groove, 221-first matching groove, 222-second matching groove, 23-full circle of water-stop strip, 241-matching through hole, 25-water guiding groove, 26-water guiding hole, 27-buckle, 28-second stud, 29-water-retaining plate, 3-panel, 31-panel through hole, 4-circuit board, 41-first component and 42-second component.

Detailed Description

To further clarify the technical solutions and effects adopted by the present application to achieve the intended purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments according to the present application. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1-4, the present invention discloses a waterproof assembly structure for a circuit board, which includes a bottom case 1, a bracket 2 and a panel 3; the bottom shell 1 is provided with an upwards-protruding enclosing plate 11, a first mounting position 12 enclosed by the enclosing plate 11, a second mounting position 13 positioned on the outer side surface of the enclosing plate 11 and a first water leakage hole 17 arranged at the second mounting position 13, and the circuit board 4 is fixedly arranged in the first mounting position 12 of the bottom shell 1; the support 2 is detachably mounted on the bottom shell 1, the support 2 is provided with at least one matching groove matched with the circuit board 4, the lower side surface of the support 2 is provided with a water baffle 29 surrounding the matching groove, the water baffle 29 is positioned on the outer side of the enclosing plate 11, and the position of the lower tail end of the water baffle 29 is lower than that of the upper tail end of the enclosing plate 11; the panel 3 is fixed on the bracket 2, and a sealing and waterproof structure is arranged between the panel 3 and the periphery of the matching groove of the bracket 2.

According to the invention, the bottom shell 1 is divided into the first mounting position 12 for mounting the circuit board 4 through the enclosing plate 11, and a sealing waterproof structure is arranged between the panel 3 and the periphery side of the matching groove of the bracket 2, so that water is prevented from flowing into the first mounting position 12 from the matching groove from the panel 2 or a gap between the panel 3 and the bracket 2 to damage the circuit board 4; meanwhile, the invention separates the first installation position 12 for installing the circuit board 4 on the bottom shell 1 through the enclosing plate 11, the lower side surface of the bracket 2 is provided with the water baffle 29 matched with the enclosing plate 11, so that the position of the lower end of the water baffle 29 is lower than that of the upper end of the enclosing plate 11, thus, the water baffle 29 and the enclosing plate 11 form a water baffle wall in the longitudinal direction, no gap for water to enter is formed between the water baffle 29 and the enclosing plate 11 in the longitudinal direction, water entering the bottom shell 1 from the gap between the bracket 2 and the bottom shell 1 can be blocked by the water baffle 29 and the enclosing plate 11 together and cannot enter the first installation position 12, and the water is blocked by the water baffle 29 and the enclosing plate 11 together, then flows into the second installation position 13 of the bottom shell 1 and is discharged from the first water leakage hole 17.

As shown in fig. 4, preferably, the water deflector 29 is not disposed adjacent to the enclosure 11, and there is a gap between the water deflector 29 and the enclosure 11, which is convenient for providing an air convection path for the circuit board 4 to dissipate heat, and thus provides operational reliability for the circuit board 4.

In one embodiment, the waterproof sealing structure between the panel 3 and the mating groove peripheral side of the bracket 2 includes: the sealing element is generally a sealant (such as silicone adhesive) or a sealing ring, and the sealing element realizes the sealed waterproof connection between the panel 3 and the bracket 2, so that water is prevented from entering the matching groove of the bracket 2 from a gap between the panel 3 and the bracket 2; or/and, establish at cooperation groove week side full circle marine conductor 23, full circle marine conductor 23 also plays the waterproof continuous so that avoid water to get into the cooperation inslot from the clearance between panel 3 and the support 2 of realizing between panel 3 and the support 2.

For example, as shown in fig. 1, the circuit board 4 includes a first component 41 and a second component 42 that are required to expose the support 2. Correspondingly, the mating grooves on the holder 2 comprise a first mating groove 221 for receiving the first component 41 and a second mating groove 222 for receiving the second component 42. For example, in a household electrical appliance such as an electric kettle or an electric baking pan, the bottom case 1 is a lower casing of the base, the circuit board 4 is located in the base, the first component 41 is a display screen, and the second component 42 is a key, at this time, a transparent area for viewing the first component 41 is set at a position on the panel 3 corresponding to the first fitting groove 221, and a key cap or a key cover for operating the second component 42 is arranged at a position corresponding to the second fitting groove 222, so that the panel 3, the bracket 2 and the bottom case 1 are matched to waterproof and fix the circuit board 4.

In one embodiment, the inner side wall of the bottom case 1 is provided with a plurality of fastening portions 15 having fastening holes, and the lower side surface of the bracket 2 is provided with a plurality of fasteners 27, each of the fasteners 27 being respectively fastened in the fastening hole of one of the fastening portions 15 to achieve the detachable connection between the bracket 2 and the bottom case 1. In addition, the lower side surface of the bracket 2 is provided with an outer apron 201 and an inner apron 202 positioned at the inner side of the outer apron 201, a supporting groove is arranged between the outer apron 201 and the inner apron 202, and the buckle 27 is arranged on the inner apron 202; correspondingly, a plurality of support brackets 16 are arranged on the inner side wall of the bottom shell 1, the top surfaces of the support brackets 16 are in contact connection with the support grooves between the outer skirt board 201 and the inner skirt board 202, the support strength of the bottom shell 1 to the support 2 is improved through the support brackets 16, and the stability of the connection relationship between the support brackets and the support 2 is improved. Furthermore, a plurality of first studs 14 are further disposed in the bottom case 1, a plurality of second studs 28 are disposed on the lower side surface of the support 2, and the support 2 and the bottom case 1 are further fixed by screws passing through the second studs 28 and the first studs 14.

In one embodiment, a third component (not shown) electrically cooperating with the circuit board 4 is further disposed on the bottom case 1, for example, the third component is a coupler. The following description will be made by taking a coupler as an example. The second mounting position 13 of the bottom case 1 is provided with a mounting tube 131 protruding upwards, the coupler is mounted in the mounting tube 131, and correspondingly, the bracket 2 and the panel 3 are respectively provided with a matching through hole 241 and a panel through hole 31 which are located above the mounting tube 131, so that the upper end of the coupler passes through the matching through hole 241 and the panel through hole 31 to be exposed. For example, a lower coupler is arranged on a base of the electric kettle, an upper coupler which is electrically coupled with the lower coupler is arranged at the bottom of the kettle, and when the kettle is placed on the base, the electric heating wire at the bottom of the kettle generates heat to heat the kettle through the electric coupling of the lower coupler and the upper coupler.

Therefore, in order to avoid that water enters from the panel through hole 31 and then affects the work of the circuit board 4, the water guide groove 25 is arranged on the bracket 2, the water guide groove 25 is positioned outside the matching through hole 241, the tail end of the water guide groove 25 is provided with a water guide hole 26, the second mounting position 13 of the bottom shell 1 is provided with a second water leakage hole 18 communicated with the water guide hole 26, and the second water leakage hole 18 is positioned on the outer side surface of the mounting cylinder 131. Further, an inclined bottom plate 132 is provided at the bottom of the mounting tube 131, and a third water leakage hole 19 is provided at a lower side of the inclined bottom plate 132. When water enters from the panel through hole 31, most of the water flows onto the bracket 2 and is guided to the water guide hole 26 by the water guide groove 25 of the bracket 2 and then discharged from the second water leakage hole 18, and a small amount of water entering from the panel through hole 31 may flow into the mounting cylinder 131 along the coupler, and at this time, the water is guided to the third water leakage hole 19 through the inclined bottom plate 132 of the mounting cylinder 131 and discharged, so that the water is prevented from being gathered in the bottom case 1 and overflowing over the enclosing plate 11 to enter the first mounting position 12 to affect the circuit board 4.

In summary, the waterproof assembly of the circuit board 4 is mainly realized by combining the water retaining structure and the water guiding structure on the premise that the circuit board 4 cannot be completely sealed due to the existence of components for information interaction with the outside on the circuit board 4 or due to reasons such as heat dissipation. The water retaining structure mainly comprises: firstly, a first mounting position 12 for mounting the circuit board 4 is separated from the bottom shell 1 through a baffle plate 11, a water baffle 29 positioned outside the baffle plate 11 is arranged on the lower side surface of the support 2, the position of the lower tail end of the water baffle 29 is lower than that of the upper tail end of the baffle plate 11, and the water baffle 29 and the baffle plate 11 form a water baffle wall in the longitudinal direction to prevent the water baffle wall from entering the first mounting position 12 after entering the bottom shell 1 from a gap between the support 2 and the bottom shell 1; secondly, set up sealed waterproof construction through panel 3 and support 2 cooperation groove week side between avoid water to influence circuit board 4 after getting into from the clearance of panel 3 and support 2. The water guide structure mainly comprises: establish first hole 17, second hole 18 and the third hole 19 that leaks on drain pan 1, will follow the water that gap between support 2 and the drain pan 1 gets into in the drain pan 1 through first hole 17 that leaks and derive, will flow the water that arrives the installation section of thick bamboo 131 lateral surface after getting into from panel through-hole 31 through second hole 18 that leaks and derive, and can flow the water that arrives in the installation section of thick bamboo 131 after getting into from panel through-hole 31 through third hole 19 that leaks and derive. In the invention, the circuit board 4 is assembled by combining the water retaining structure and the water guide structure, so that the circuit board can be effectively and reliably protected from water in a use state, and the circuit board is simple in integral structure and convenient to assemble and operate.

The invention also discloses a household appliance, such as an electric kettle or an electric baking pan, which comprises a base, wherein the base comprises the waterproof assembly structure of the circuit board shown in the figures 1 and 4, so that the service life and the reliability of the household appliance are improved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.