Novel bottom cover waterproof structure

Abstract

The utility model provides a novel bottom cover waterproof structure which comprises a bottom cover arranged at the bottom of an electric toothbrush, and a first opening is formed in the position, corresponding to a charging port of the electric toothbrush, of the bottom cover; the waterproof cover is arranged below the bottom cover and used for protecting the charging port, and the waterproof cover is provided with a dried mushroom head used for being connected with the bottom cover; the bottom cover is provided with a blind hole into which the dried mushroom head is inserted; the pressing plate is arranged on the bottom cover, and a through hole through which the dried mushroom head penetrates is formed in the position, corresponding to the blind hole, of the pressing plate. The blind holes are formed in the bottom cover to replace through holes in the prior art, the bottom cover is good in integrity and high in waterproof reliability, connection between the dried mushroom head and the bottom cover does not need to be sealed, and the defects in the prior art are overcome; besides, in order to limit the waterproof cover, a pressing plate is arranged outside the bottom cover, and a through hole is formed in the pressing plate, so that the dried mushroom head can be prevented from being separated from the bottom cover.

Description

Technical Field

[0001] This utility model relates to the field of bottom cover waterproofing technology, specifically to a bottom cover waterproofing mechanism. Background Technology

[0002] Currently, most electric toothbrushes are required to meet the IPX7 waterproof rating. With the widespread adoption of Type-C charging ports, many manufacturers are using them on their electric toothbrushes. However, charging an electric toothbrush with a Type-C port submerged in water poses safety risks, including short circuits and corrosion.

[0003] Liquids containing impurities or salt may conduct the power pins (VBUS, GND) of the Type-C interface, causing a high-current short circuit that could burn out the charging chip or motherboard circuitry. The risk of a short circuit is even higher if water gets into the device while it is charging, as current is flowing and could directly damage the charging IC or power management chip. Even if a short circuit doesn't occur immediately, impurities in the water (such as toothpaste water, seawater, or beverages) can corrode the metal contacts, leading to poor contact or open circuits over time.

[0004] For overall internal waterproofing, many manufacturers add an extra layer of waterproof protection to the Type-C charging port. This is achieved by adding a waterproof cover between the Type-C port and the bottom cover. The waterproof cover is typically made of hard rubber wrapped around soft rubber or purely soft rubber. The cover usually uses an interference fit between the soft rubber and the Type-C port to achieve a seal. Figure 1 As shown, the waterproof cap and bottom cap are typically connected by a mushroom-shaped structure. This means the waterproof cap has a long rib extending from its end, ending in a mushroom-shaped inverted loop. The bottom cap has a through-hole with a diameter smaller than the mushroom-shaped loop. During assembly, the mushroom-shaped loop of the waterproof cap is forced through the through-hole by strong pulling, thus connecting the cap and the bottom cap. Because the bottom cap has an additional through-hole, a seal is needed for it. There are usually two solutions: one is to seal the through-hole with glue; the other is to add a sealing ring to the through-hole.

[0005] The two sealing solutions mentioned above have the following drawbacks:

[0006] 1. The potting solution is complex, requiring a partition between the waterproof cap's soft rubber and the potting compound to prevent them from sticking together, making subsequent assembly operations more complicated. Furthermore, if the partition is omitted or the potting compound fails, the seal will be compromised, and rework will be quite complex.

[0007] 2. Higher cost: Adding a sealing ring and a rigid rubber bracket to seal the bottom cover's through-hole increases costs and compromises reliability. If a sealing ring is missing, the seal fails, and rework is complex.

[0008] Therefore, we provide a novel waterproof bottom cover structure to address the shortcomings of the above-mentioned problems. Utility Model Content

[0009] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a new type of waterproof bottom cover structure.

[0010] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a novel waterproof bottom cover structure, comprising:

[0011] A bottom cover is provided at the bottom of the electric toothbrush, and the bottom cover has a first opening at the position corresponding to the charging port of the electric toothbrush;

[0012] A waterproof cover is provided below the bottom cover to protect the charging port, and the waterproof cover is provided with a mushroom-shaped head for connecting with the bottom cover;

[0013] The bottom cover is provided with a blind hole for inserting the mushroom head;

[0014] A pressure plate is provided on the bottom cover, and a through hole for the mushroom head to pass through is provided at the position corresponding to the blind hole.

[0015] Furthermore, the size of the blind hole is larger than that of the mushroom cap, and the size of the through hole is smaller than that of the mushroom cap.

[0016] Furthermore, the pressure plate is provided with a second opening at the position corresponding to the first opening.

[0017] Furthermore, the waterproof cover is provided with a sealing strip for passing through the second opening and the first opening and inserting into the charging port.

[0018] Furthermore, the pressure plate is mounted on the bottom cover by ultrasonic welding, adhesive bonding, or snap-fit ​​connection.

[0019] Furthermore, a first sealing ring for sealing the bottom of the electric toothbrush is provided on the outer side of the bottom cover.

[0020] Furthermore, a second sealing ring for sealing connection is provided between the charging port and the bottom cover.

[0021] Furthermore, the bottom cover is provided with a groove for mounting a pressure plate, and a gap is provided between the end of the waterproof cover away from the mushroom head and the side wall of the groove.

[0022] Furthermore, the waterproof cap has an inclined surface on the side of the end away from the mushroom head and close to the pressure plate.

[0023] Compared with the prior art, this utility model has the following beneficial effects:

[0024] This invention replaces the through holes in the prior art with blind holes on the bottom cover, resulting in better bottom cover integrity and high waterproof reliability. It eliminates the need to seal the connection between the mushroom cap and the bottom cover, thus solving the defects of the prior art. In addition, in order to limit the waterproof cover, this application sets a pressure plate on the outside of the bottom cover, and the pressure plate has through holes, thereby preventing the mushroom cap from detaching from the bottom cover and facilitating the normal use of the waterproof cover. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0026] Figure 1 This refers to the bottom cover structure in existing technology.

[0027] Figure 2 This is a schematic diagram of an electric toothbrush according to an embodiment of the present invention.

[0028] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0029] In the diagram: 1. Electric toothbrush; 2. Charging port; 3. Bottom cover; 31. First opening; 4. Waterproof cover; 41. Mushroom head; 32. Blind hole; 5. Pressure plate; 51. Through hole; 52. Second opening; 42. Sealing strip; 33. First sealing ring; 21. Second sealing ring; 34. Groove. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Please see Figure 2-3 This utility model discloses a novel waterproof bottom cover structure, comprising:

[0032] The bottom cover 3 is located at the bottom of the electric toothbrush 1, and the bottom cover 3 has a first opening 31 at the position corresponding to the charging port 2 of the electric toothbrush 1.

[0033] A waterproof cover 4 is located below the bottom cover 3 to protect the charging port 2. The waterproof cover 4 is provided with a mushroom head 41 for connecting with the bottom cover 3. Both the waterproof cover 4 and the mushroom head 41 are made of soft rubber.

[0034] The bottom cover 3 is provided with a blind hole 32 for inserting the mushroom head 41;

[0035] A pressure plate 5 is provided on the bottom cover 3, and a through hole 51 for the mushroom head 41 to pass through is provided at the position corresponding to the blind hole 32.

[0036] During assembly, the mushroom head 41 is first pulled through the through hole 51 on the pressure plate 5 by strong pulling. Then the pressure plate 5 is installed on the bottom cover 3. The waterproof cover 4 protects the charging port 2. The complex and costly connection method in the prior art, which requires potting glue or sealing the through hole 51 of the bottom cover 3, is transformed into a simple connection between the pressure plate 5 and the bottom cover 3. This solves the defects in the prior art and ensures the waterproof effect of the electric toothbrush 1.

[0037] In one embodiment, the size of the blind hole 32 is larger than that of the mushroom head 41, and the size of the through hole 51 is smaller than that of the mushroom head 41. This design allows the mushroom head 41 to be placed easily within the blind hole 32 by making the size of the blind hole 32 larger than that of the mushroom head 41, and by making the size of the through hole 51 smaller than that of the mushroom head 41, the mushroom head 41 can be confined, preventing the waterproof cover 4 from falling off the bottom cover 3.

[0038] In one embodiment, the pressure plate 5 is provided with a second opening 52 corresponding to the position of the first opening 31. This design allows for convenient charging of the electric toothbrush 1 through the charging port 2 by providing the first opening 31 and the second opening 52.

[0039] In one embodiment, the waterproof cover 4 is provided with a sealing strip 42 for passing through the second opening 52 and the first opening 31 and inserting into the charging port 2. This design, by providing the sealing strip 42, allows the charging port 2 to be sealed during use of the waterproof cover 4, preventing external debris or water from entering the charging port 2 and effectively protecting it.

[0040] In one embodiment, the pressure plate 5 is mounted on the bottom cover 3 by ultrasonic welding, adhesive bonding, or snap-fit ​​connection. This design facilitates the connection between the pressure plate 5 and the bottom cover 3, and eliminates the need for sealing rings or potting, reducing costs and simplifying assembly.

[0041] In one embodiment, a first sealing ring 33 is provided on the outer side of the bottom cover 3 for sealing the bottom connection of the electric toothbrush 1. This design facilitates sealing the connection between the bottom cover 3 and the electric toothbrush 1 by providing the first sealing ring 33, preventing water from entering at the connection between the electric toothbrush 1 and the bottom cover 3.

[0042] In one embodiment, a second sealing ring 21 is provided between the charging port 2 and the bottom cover 3 for sealing connection. This design, by providing the second sealing ring 21, can seal the connection between the charging port 2 and the bottom cover 3, facilitating the use of the charging port 2.

[0043] In one embodiment, the bottom cover 3 is provided with a groove 34 for mounting the pressure plate 5, and a gap is provided between the end of the waterproof cover 4 away from the mushroom head 41 and the side wall of the groove 34. This design, by providing the groove 34, facilitates the storage of the waterproof cover 4 and the pressure plate 5, thereby ensuring the bottom of the electric toothbrush 1 is level, making it easy to place the electric toothbrush 1. Furthermore, by providing a gap between the end of the waterproof cover 4 away from the mushroom head 41 and the groove 34, it is easy to remove the waterproof cover 4 for convenient use.

[0044] In one embodiment, the end of the waterproof cap 4 furthest from the mushroom-shaped head 41, near the pressure plate 5, has an inclined surface. This inclined surface design makes it easier to pry out the waterproof cap 4.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A novel waterproof bottom cover structure, characterized in that, include: The bottom cover (3) is set at the bottom of the electric toothbrush (1), and the bottom cover (3) has a first opening (31) at the position corresponding to the charging port (2) of the electric toothbrush (1); A waterproof cover (4) is provided below the bottom cover (3) to protect the charging port (2), and the waterproof cover (4) is provided with a mushroom head (41) for connecting with the bottom cover (3); The bottom cover (3) is provided with a blind hole (32) for inserting the mushroom head (41); A pressure plate (5) is provided on the bottom cover (3), and a through hole (51) through which the mushroom head (41) passes is provided at the position corresponding to the blind hole (32).

2. The novel waterproof bottom cover structure according to claim 1, characterized in that, The size of the blind hole (32) is larger than that of the mushroom head (41), and the size of the through hole (51) is smaller than that of the mushroom head (41).

3. The novel waterproof bottom cover structure according to claim 1 or 2, characterized in that, The pressure plate (5) has a second opening (52) at the position corresponding to the first opening (31).

4. The novel waterproof bottom cover structure according to claim 3, characterized in that, The waterproof cover (4) is provided with a sealing strip (42) for passing through the second opening (52) and the first opening (31) and inserting into the charging port (2).

5. The novel waterproof bottom cover structure according to claim 1 or 2, characterized in that, The pressure plate (5) is mounted on the bottom cover (3) by ultrasonic welding, glue bonding or snap-fit ​​connection.

6. The novel waterproof bottom cover structure according to claim 1 or 2, characterized in that, The outer side of the bottom cover (3) is provided with a first sealing ring (33) for sealing the bottom connection of the electric toothbrush (1).

7. The novel waterproof bottom cover structure according to claim 1 or 2, characterized in that, A second sealing ring (21) for sealing connection is provided between the charging port (2) and the bottom cover (3).

8. The novel waterproof bottom cover structure according to claim 1 or 2, characterized in that, The bottom cover (3) is provided with a groove (34) for mounting a pressure plate (5), and a gap is provided between the end of the waterproof cover (4) away from the mushroom head (41) and the side wall of the groove (34).

9. The novel waterproof bottom cover structure according to claim 8, characterized in that, The waterproof cover (4) has an inclined surface on the side of the end away from the mushroom head (41) and close to the pressure plate (5).

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