Tail cover assembly, handle and oral cleaning appliance

Abstract

The utility model provides a tail cover assembly, a handle and an oral cleaning tool for an oral cleaning tool. The tail cover assembly includes an inner cover and an outer cover. The middle area of ​​the lower surface of the inner cover is recessed upward to form a first recessed portion, and the first edge portion arranged around the first recessed portion is protruded downward relative to the first recessed portion. The shape of the outer cover is adapted to the shape of the lower surface of the inner cover, the middle area of ​​the outer cover is recessed upward as a whole to form a second recessed portion, and the outer cover forms a second edge portion relative to the first edge portion. A height difference is formed between the second recessed portion and the second edge portion. If external water enters the tail cover assembly from the joint between the outer cover and the inner cover, and the amount of water is limited, the height difference can prevent water from moving from the second edge portion to the second recessed portion, thereby preventing water from spreading to the electrical connector, thereby achieving waterproofing.

Description

Technical Field

[0001] The present application relates to the field of oral care, and in particular to a tail cover assembly of an oral cleaning appliance, a handle, and an oral cleaning appliance. Background Art

[0002] Oral hygiene appliances should be used in the bathroom or near a washbasin, where they are usually in contact with water. During use or cleaning, water can easily enter the tail cover assembly or oral hygiene appliances through the joints, and then penetrate into the electrical connectors, batteries or circuit parts. This may cause safety hazards such as short circuits, battery damage, and even fire.

[0003] The above contents are only used to assist in understanding the technical solutions of the utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a tail cover assembly, a handle and an oral cleaning appliance for an oral cleaning device, aiming to solve the technical problem that water easily enters the tail cover assembly from the joint seam of the tail cover assembly and then soaks the electrical connector.

[0005] To achieve the above-mentioned purpose, the tail cover assembly of the oral cleaning appliance proposed in the utility model comprises an inner cover and an outer cover, the middle area of ​​the lower surface of the inner cover is recessed upward to form a first recessed portion, the lower surface of the inner cover has a first edge portion arranged around the first recessed portion, the first edge portion is protruding downward relative to the first recessed portion, and the first recessed portion is provided with a first through hole;

[0006] The middle area of ​​the outer cover is integrally recessed upward to form a second recessed portion, the outer cover has a second edge portion arranged around the second recessed portion, the second edge portion is protruding downward relative to the second recessed portion, and the second recessed portion is provided with a second through hole;

[0007] The outer cover covers the bottom of the inner cover, the second recessed portion covers the first recessed portion, the second through hole is aligned with the first through hole, and the second edge portion covers the first edge portion.

[0008] Furthermore, the tail cover assembly also includes an adhesive layer, and the adhesive layer bonds the upper surface of the outer cover and the lower surface of the inner cover.

[0009] Furthermore, a glue containing groove is provided on the lower surface of the inner cover, and the outer cover covers the notch of the glue containing groove.

[0010] Further, the first edge portion is provided with the glue containing groove; and / or the first recessed portion is provided with the glue containing groove.

[0011] In one embodiment, the glue containing groove is annularly shaped and surrounds the first through hole.

[0012] In one embodiment, a positioning groove is provided at the connection between the first recessed portion and the first edge portion, and a positioning protrusion is provided at the connection between the second recessed portion and the second edge portion, and the positioning protrusion is plugged into the positioning groove.

[0013] In one embodiment, the inner cover is a plastic part, and the outer cover is a metal part; and / or,

[0014] One of the inner cover and the outer cover is provided with a buckle, and the other is provided with a slot engaged with the buckle.

[0015] In one embodiment, the inner cover includes a bottom wall and a side wall, the side wall is connected to the edge of the bottom wall and is arranged around the bottom wall, the middle area of ​​the bottom wall forms the first recessed portion, and the connection between the bottom wall and the side wall forms the first edge portion.

[0016] The utility model also proposes a handle for an oral cleaning tool, comprising a handle shell, a tail cover assembly of the oral cleaning tool described in any of the above embodiments, and an electrical connector; the lower end of the handle shell has an opening, and the tail cover assembly seals and covers the opening; the electrical connector is arranged in the first through hole and the second through hole.

[0017] The utility model also provides an oral cleaning appliance, comprising the handle and a brush head of the oral cleaning appliance described in the above embodiment, wherein the brush head is connected to the upper end of the handle of the oral cleaning appliance.

[0018] The utility model provides a tail cover assembly of an oral cleaning appliance. The tail cover assembly includes an inner cover and an outer cover. The middle area of ​​the lower surface of the inner cover is recessed upward to form a first recessed portion, and the first edge portion arranged around the first recessed portion is protruded downward relative to the first recessed portion. The shape of the outer cover is adapted to the shape of the lower surface of the inner cover, the middle area of ​​the outer cover is recessed upward as a whole to form a second recessed portion, and the outer cover forms a second edge portion relative to the first edge portion. A height difference is formed between the second recessed portion and the second edge portion. If external water enters the tail cover assembly from the joint between the outer cover and the inner cover, and the amount of water is limited, the height difference can prevent water from moving from the second edge portion to the second recessed portion, thereby preventing water from spreading to the electrical connector, thereby achieving waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of an embodiment of a tail cover assembly of an oral cleaning appliance of the utility model is shown;

[0021] Figure 2 for Figure 1 An exploded view of the tail cover assembly of the oral cleaning appliance in one perspective;

[0022] Figure 3 for Figure 1 An exploded view of the tail cover assembly of the oral cleaning appliance in another perspective;

[0023] Figure 4 for Figure 1 Cross-sectional view along line IV-IV;

[0024] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0025] Figure 6 It is a structural schematic diagram of another embodiment of the tail cover assembly of the oral cleaning appliance of the present invention;

[0026] Figure 7 for Figure 6 An exploded view of the tail cover assembly of the oral cleaning appliance in one perspective;

[0027] Figure 8 for Figure 6 An exploded view of the tail cover assembly of the oral cleaning appliance in another perspective;

[0028] Fig. 9 for Figure 6 Sectional view along line IX-IX;

[0029] Fig.10 for Fig. 9 A partial enlarged view of point B in the middle;

[0030] Fig.11 for Figure 6 Sectional view along line IX-IX;

[0031] Fig.12 for Fig.11 A partial enlarged view of point C in the middle;

[0032] Description of Figure Numbers:

[0033]

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B.

[0038] Oral hygiene equipment should be used in the bathroom or near a washbasin, where it is usually in contact with water. During use or cleaning, water can easily enter the body through the joints and then penetrate into the battery or circuit part. This may cause safety hazards such as short circuit, battery damage, or even fire.

[0039] The utility model provides a tail cover assembly of an oral cleaning appliance. Oral cleaning appliances refer to tools and supplies for maintaining oral hygiene, including but not limited to electric toothbrushes, water flossers, tooth washers and the like.

[0040] In the embodiment of the present utility model, please refer to Figures 1 to 4 , Figures 6 to 9The tail cover assembly 100 / 200 of the oral cleaning appliance includes an inner cover 10 and an outer cover 20.

[0041] The inner cover 10 and the outer cover 20 can both be metal parts, or both be plastic parts. In some embodiments, the inner cover 10 is a plastic part, and the outer cover 20 is a metal part. The plastic part can be made of TPE (thermoplastic elastomer), ABS (acrylonitrile-butadiene-styrene copolymer), engineering plastics, etc. Plastic is easy to shape, and the inner cover 10 can be formed into a complex shape to simultaneously connect the handle shell and the outer cover 20 of the oral cleaning appliance. The metal part can be made of aluminum alloy, stainless steel, etc. Compared with plastic, metal has higher strength, making the outer cover 20 more resistant to falling, smashing and durable. At the same time, the outer cover 20 made of metal has a metallic texture, which improves the aesthetic appearance.

[0042] The middle area of ​​the lower surface of the inner cover 10 is recessed upward to form a first recessed portion 11. The lower surface of the inner cover 10 has a first edge portion 12 arranged around the first recessed portion 11. The first edge portion 12 is arranged to protrude downward relative to the first recessed portion 11, and a height difference is formed between the first recessed portion 11 and the first edge portion 12. The middle area of ​​the outer cover 20 is recessed upward as a whole to form a second recessed portion 21. The outer cover 20 has a second edge portion 22 arranged around the second recessed portion 21. The second edge portion 22 is arranged to protrude downward relative to the second recessed portion 21. A height difference is formed between the second recessed portion 21 and the second edge portion 22. If external water enters the tail cover assembly 100 / 200 from the joint between the outer cover 20 and the inner cover 10, due to the existence of the height difference, the water cannot resist gravity and move from the second edge portion 22 to the second recessed portion 21, thereby preventing the water from spreading to the charging place, thereby achieving a waterproof function.

[0043] When the outer cover 20 covers the bottom of the inner cover 10, the second recessed portion 21 covers the first recessed portion 11, and the second edge portion 22 covers the first edge portion 12. During production, the inner cover 10 made of plastic is prone to depression, cracks, warping and deformation. And during use, the plastic is prone to aging and yellowing. In this embodiment, the inner cover 10 is covered by the outer cover 20, so the outer cover 20 can hide the appearance defects of the plastic, making the appearance of the tail cover assembly 100 / 200 more aesthetic. In addition, the second recessed portion 21 corresponds to the first recessed portion 11 and the second edge portion 22 is assembled corresponding to the first edge portion 12, which can simplify the assembly steps and improve the assembly efficiency.

[0044] The first recessed portion 11 is provided with a first through hole 111, and the second recessed portion 21 is provided with a second through hole 211, and the second through hole 211 is aligned with the first through hole 111. In some embodiments, the oral cleaning appliance further includes an electrical connector 40, such as a Type-C wired charging component, a USB wired charging component, or a magnetic spring pin electrical connector. Figures 2 to 4The electrical connector 40 passes through the first through hole 111 and the second through hole 211 in sequence, so that the charging port is exposed to the outside, which is convenient for users to charge. In addition, the outer surface of the second recessed portion 21 forms a water-proof space 50 to prevent the accumulated water on the table from penetrating into the tail cover assembly 100 / 200 through the second through hole 211 and then soaking the electrical connector 40.

[0045] The utility model provides a tail cover assembly 100 / 200 of an oral cleaning appliance. The tail cover assembly 100 / 200 includes an inner cover 10 and an outer cover 20. Among them, the middle area of ​​the lower surface of the inner cover 10 is recessed upward to form a first recessed portion 11, and the first edge portion 12 arranged around the first recessed portion 11 is protruded downward relative to the first recessed portion 11. The shape of the outer cover 20 is adapted to the shape of the lower surface of the inner cover 10, the middle area of ​​the outer cover 20 is recessed upward as a whole to form a second recessed portion 21, and the outer cover 20 forms a second edge portion 22 corresponding to the first edge portion 12. A height difference is formed between the second recessed portion 21 and the second edge portion 22. If external water enters the tail cover assembly 100 / 200 from the joint between the outer cover 20 and the inner cover 10, and the amount of water is limited, the height difference can prevent water from moving from the second edge portion 22 to the second recessed portion 21, thereby preventing water from spreading to the electrical connector 40, thereby achieving waterproofing.

[0046] Further, refer to Figure 4 , Fig. 9 as well as Fig.11 The tail cover assembly 100 / 200 further includes an adhesive layer, and the adhesive layer bonds the upper surface of the outer cover 20 and the lower surface of the inner cover 10. Compared with riveting, bonding can avoid the problems of thermal stress and stress concentration. In addition, the adhesive layer can not only connect the outer cover 20 and the inner cover 10, but also form a tight sealing effect by using the adhesive to prevent external water from entering between the outer cover 20 and the inner cover 10, and then corroding the outer cover 20 made of metal, thereby reducing the service life of the tail cover assembly 100 / 200.

[0047] In some embodiments, the adhesive layer includes the connection between the first recessed portion 11 and the second recessed portion 21. The surface of the connection between the first recessed portion 11 and the second recessed portion 21 is flat, which is convenient for coating or filling with glue, and it is easy to control the thickness of the adhesive layer, so that the adhesive is evenly and evenly distributed at the connection between the first recessed portion 11 and the second recessed portion 21, thereby allowing the inner cover 10 and the outer cover 20 to be accurately assembled.

[0048] Further, refer to Figure 5 , Fig.10 as well as Fig.11, the lower surface of the inner cover 10 is provided with a glue groove 30a / 30b / 30c, and the outer cover 20 covers the notch of the glue groove 30a / 30b / 30c. The glue groove 30a / 30b / 30c is filled with waterproof glue, such as silicone waterproof glue, PU waterproof glue, etc. Since the glue groove 30a / 30b / 30c has a certain depth, the waterproof glue filled in the groove has a certain thickness. In this way, water entering from the gap between the inner cover 10 and the outer cover 20 can be prevented from spreading to the electrical connector 40.

[0049] Further, in some embodiments, the first edge portion 12 is provided with a glue groove 30a / 30b. Compared with the first recessed portion 11, the first edge portion 12 is closer to the joint between the inner cover 10 and the outer cover 20. In other words, the first edge portion 12 is closer to the water seepage. The glue groove 30a / 30b is provided in the first edge portion 12 so that the relatively thick waterproof glue is closer to the water seepage. In this way, water can be prevented from spreading between the outer cover 20 and the inner cover 10 from the water seepage.

[0050] In certain embodiments, reference Figure 5 The outer surface of the inner cover 10 is provided with two convex rings 31 facing the inner surface of the outer cover 20, and the two convex rings 31 and the outer surface of the inner cover 10 are surrounded to form a glue containing groove 30a. Figure 5 , wherein the upper surface of a convex ring 31 is flush with the upper surface of the first edge portion 12. Flush means that the heights are consistent or nearly consistent. In this way, external water cannot enter the tail cover assembly 100 / 200 from the joint between the inner cover 10 and the outer cover 20.

[0051] In certain embodiments, reference Fig.10 , Fig.12 The outer surface of the inner cover 10 is recessed inward to form a glue containing groove 30b.

[0052] In certain embodiments, reference Fig.11 , the first recessed portion 11 is provided with a glue containing groove 30c. Further, the glue containing groove 30c is provided near the connection between the first recessed portion 11 and the first edge portion 12. In this way, when the amount of water is particularly large and spreads from the first edge portion 12 to the first recessed portion 11, the glue containing groove 30c can prevent the water entering the tail cover assembly 200 from the joint between the inner cover 10 and the outer cover 20 from spreading to the electrical connector 40.

[0053] In one embodiment, the adhesive groove 30a / 30b / 30c is annular and surrounds the first through hole 111. The adhesive groove 30a / 30b / 30c surrounds the first through hole 111, thereby preventing water from all directions from wetting the electrical connector 40.

[0054] In one embodiment, referring to Fig.10 and Fig.11A positioning groove 13 is provided at the connection between the first recessed portion 11 and the first edge portion 12, and a positioning protrusion 23 is provided at the connection between the second recessed portion 21 and the second edge portion 22, and the positioning protrusion 23 is plugged into the positioning groove 13. The positioning groove 13 and the positioning protrusion 23 are used to ensure that the relative positions of the first recessed portion 11 and the second recessed portion 21, the first edge portion 12 and the second edge portion 22 are correctly aligned, thereby improving the assembly accuracy and assembly quality of the tail cover assembly 100 / 200. At the same time, the mutual adaptation of the positioning groove 13 and the positioning protrusion 23 can reduce the debugging and correction time, quickly realize the accurate alignment of the parts, and thus improve the assembly efficiency.

[0055] In one embodiment, one of the inner cover 10 and the outer cover 20 is provided with a buckle 24, and the other is provided with a slot 24 engaged with the buckle 14. The buckle 14 is engaged with the slot 24, which not only prevents the outer cover 20 from falling off downward, but also saves space. Specifically, the combination of the buckle 14 and the slot 24 does not require additional internal structural space, which helps the tail cover assembly 200 to achieve a compact structure.

[0056] Reference Fig.11 and Fig.12 , the buckle 14 is made of plastic, and the slot 24 is made of metal. Since plastic has a certain elasticity and metal mainly exhibits rigidity, the combination of the plastic buckle 14 and the metal groove allows the tail cover assembly 200 to have greater coordination during the assembly process, which can make it easier and more accurate to fix the parts in a certain position, thereby improving the assembly efficiency. Specifically, during installation, the plastic buckle 14 can undergo elastic deformation within a certain range, and when the plastic buckle 14 is installed in the metal slot 24, it returns to its natural state and forms a snap connection with the metal slot 24. At the same time, this assembly method provides convenience for maintenance and disassembly.

[0057] In one embodiment, the inner cover 10 includes a bottom wall and a side wall, the side wall is connected to the edge of the bottom wall and is arranged around the bottom wall, the middle area of ​​the bottom wall forms the first recessed portion 11, and the connection between the bottom wall and the side wall forms the first edge portion 12. In this way, the inner cover 10 can not only be connected to the outer cover 20, but also be connected to the handle housing of the oral cleaning appliance through the side wall. In some embodiments, refer to Figure 4 , a hook 51 protruding laterally is provided on the side wall, and the hook 51 is connected to the handle housing of the oral cleaning appliance. Figure 4 A sealing groove 52 is provided on the side wall, and a waterproof sealing ring can be placed in the sealing groove 52 to achieve a waterproof function.

[0058] The utility model also proposes a handle of an oral cleaning appliance, the handle of the oral cleaning appliance comprises a handle housing, a tail cover assembly 100 / 200 of the oral cleaning appliance and an electrical connector 40. The specific structure of the tail cover assembly 100 / 200 of the oral cleaning appliance refers to the above-mentioned embodiment. Since the handle of the oral cleaning appliance adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the lower end of the handle housing has an opening, and the tail cover assembly 100 / 200 seals and covers the opening. The electrical connector 40 is arranged in the first through hole 111 and the second through hole 211.

[0059] The utility model also provides a handle of an oral cleaning appliance, which includes a handle of the oral cleaning appliance and a brush head. The specific structure of the handle of the oral cleaning appliance refers to the above embodiment. Since the handle of the oral cleaning appliance adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the brush head is connected to the upper end of the handle of the oral cleaning appliance.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tail cover assembly for an oral cleaning appliance, characterized in that: include: An inner cover, wherein a middle area of ​​a lower surface of the inner cover is recessed upward to form a first recessed portion, the lower surface of the inner cover has a first edge portion arranged around the first recessed portion, the first edge portion is protruded downward relative to the first recessed portion, and the first recessed portion is provided with a first through hole; An outer cover, wherein the middle area of ​​the outer cover is integrally recessed upward to form a second recessed portion, the outer cover has a second edge portion arranged around the second recessed portion, the second edge portion is protruding downward relative to the second recessed portion, and the second recessed portion is provided with a second through hole; The outer cover covers the bottom of the inner cover, the second recessed portion covers the first recessed portion, the second through hole is aligned with the first through hole, and the second edge portion covers the first edge portion.

2. The tail cap assembly of the oral cleaning appliance according to claim 1, characterized in that: The tail cover assembly further includes an adhesive layer, and the adhesive layer bonds the upper surface of the outer cover and the lower surface of the inner cover.

3. The tail cover assembly of the oral cleaning appliance according to claim 2, characterized in that: The lower surface of the inner cover is provided with a glue containing groove, and the outer cover covers the notch of the glue containing groove.

4. The tail cap assembly of the oral cleaning appliance according to claim 3, characterized in that: The first edge portion is provided with the glue containing groove; and / or, The first recessed portion is provided with the glue containing groove.

5. The tail cap assembly of the oral cleaning appliance according to claim 3, characterized in that: The glue containing groove is annularly shaped and surrounds the first through hole.

6. The tail cap assembly of the oral cleaning appliance according to claim 1, characterized in that: A positioning groove is provided at the connection between the first recessed portion and the first edge portion, and a positioning protrusion is provided at the connection between the second recessed portion and the second edge portion, and the positioning protrusion is plugged into the positioning groove.

7. The tail cap assembly of the oral cleaning appliance according to claim 1, characterized in that: The inner cover is a plastic part, and the outer cover is a metal part; and / or, One of the inner cover and the outer cover is provided with a buckle, and the other is provided with a slot engaged with the buckle.

8. The tail cap assembly of an oral cleaning appliance according to any one of claims 1 to 7, characterized in that: The inner cover includes a bottom wall and a side wall, wherein the side wall is connected to the edge of the bottom wall and is arranged around the bottom wall, the middle area of ​​the bottom wall forms the first recessed portion, and the connection between the bottom wall and the side wall forms the first edge portion.

9. A handle for an oral cleaning appliance, characterized in that: include: Handle housing; The tail cap assembly of the oral cleaning appliance according to any one of claims 1 to 8, wherein the lower end of the handle housing has an opening, and the tail cap assembly seals and covers the opening; as well as, An electrical connector is disposed in the first through hole and the second through hole.

10. An oral cleaning appliance, characterized in that: It comprises a handle and a brush head of the oral cleaning appliance as claimed in claim 9, wherein the brush head is connected to the upper end of the handle of the oral cleaning appliance.

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