阅读说明：本技术 Usb接口器件、usb接口装配组件及电动牙刷 (USB interface device, USB interface assembly and electric toothbrush ) 是由 赵立群 李建如 吴胜斌 刘仕华 陈建群 于 2020-05-15 设计创作，主要内容包括：本发明提供了一种USB接口器件、USB接口装配组件及电动牙刷,涉及电动牙刷技术领域,本发明提供的USB接口器件,被用于插装在机身底壳内,包括：注塑件和钣金件；钣金件包覆于注塑件；注塑件和钣金件中的至少其一设有与机身底壳相适配的定位结构。本发明提供的USB接口器件,通过定位结构配合机身底壳,简化USB接口器件的接线,且省去了电路板,解决了USB接口器件装配定位不准确以及USB接口器件制作成本高的问题。(The invention provides a USB interface device, a USB interface assembly component and an electric toothbrush, relating to the technical field of electric toothbrushes, wherein the USB interface device provided by the invention is used for being inserted in a bottom shell of a machine body and comprises: injection molding and sheet metal parts; the sheet metal part is coated on the injection molding part; at least one of the injection molding part and the sheet metal part is provided with a positioning structure matched with the bottom shell of the machine body. According to the USB interface device provided by the invention, the positioning structure is matched with the bottom shell of the machine body, so that the wiring of the USB interface device is simplified, a circuit board is omitted, and the problems of inaccurate assembly and positioning of the USB interface device and high manufacturing cost of the USB interface device are solved.)

1. A USB interface device for insertion in a bottom shell (4) of a body, comprising: an injection molding part (1) and a sheet metal part (2);

the sheet metal part (2) is coated on the injection molding part (1);

at least one of the injection molding part (1) and the sheet metal part (2) is provided with a positioning structure (3) matched with the bottom shell (4) of the machine body.

2. USB interface device according to claim 1, characterized in that the positioning structure (3) comprises a projection which projects in a direction perpendicular to the insertion direction;

the bellying with injection molding (1) integrated into one piece, perhaps, the bellying by sheet metal component (2) stamping forming.

3. The USB interface device according to claim 1, wherein the injection molded part (1) is provided with a connector (5) for mating with an external USB device, and the injection molded part (1) and the connector (5) are formed integrally by injection molding.

4. USB interface device according to claim 3, characterized in that a first pad (6) and a second pad (7) are connected to the injection-molded part (1);

one of the first pad (6) and the second pad (7) is connected to a positive terminal of the connector (5), and the other is connected to a negative terminal of the connector (5).

5. USB interface device according to claim 4, characterized in that the injection-molded part (1) is provided with an extension (11), which extension (11) extends to the outside of the sheet metal part (2);

the first pad (6) and the second pad (7) are connected to the extension portion (11), respectively.

6. A USB interface mounting assembly, comprising: a body bottom shell (4) and the USB interface device of any one of claims 1-5;

the USB interface device is inserted into the machine body bottom shell (4), and the positioning structure (3) is matched with the machine body bottom shell (4).

7. The USB interface assembly according to claim 6, wherein the bottom housing (4) of the body is provided with a position-limiting portion (41), and the positioning structure (3) abuts against the position-limiting portion (41).

8. The USB interface assembly of claim 6, wherein said body bottom shell (4) is filled with a sealant to fix said USB interface device.

9. The USB interface assembly according to claim 8, wherein a fitting gap (8) is formed between the sheet metal part (2) and the bottom shell (4) of the body, and the sealant is infiltrated and cured in the fitting gap (8).

10. An electric toothbrush provided with a USB interface device according to any one of claims 1 to 5 or with a USB interface fitting according to any one of claims 6 to 9.

Technical Field

The invention relates to the technical field of electric toothbrushes, in particular to a USB interface device, a USB interface assembly component and an electric toothbrush.

Background

The USB interface device of current electric toothbrush adopts circuit board welding sheet metal component to form the plastic part at the inside injection moulding of sheet metal component, sheet metal component and plastic are difficult to form good sealed because of the material difference. When the USB interface assembly component is assembled, the USB interface assembly component is positioned to the bottom shell of the machine body by the circuit board, and the plastic end face of the USB interface device and the end face of the bottom shell of the machine body compress the sealing ring to prevent water.

Disclosure of Invention

The invention aims to provide a USB interface device, a USB interface assembly component and an electric toothbrush, and solves the problems that the USB interface device is inaccurate in assembly and positioning and the manufacturing cost of the USB interface device is high.

In a first aspect, the present invention provides a USB interface device for being inserted into a bottom case of a body, including: injection molding and sheet metal parts;

the sheet metal part is coated on the injection molding part;

at least one of the injection molding part and the sheet metal part is provided with a positioning structure matched with the bottom shell of the machine body.

Further, the positioning structure comprises a protruding part which protrudes along a direction perpendicular to the insertion direction;

the bellying with injection molding integrated into one piece, perhaps, the bellying by sheet metal component stamping forming.

Furthermore, a connector matched with an external USB device is arranged in the injection molding piece, and the injection molding piece and the connector are integrated through injection molding.

Furthermore, a first bonding pad and a second bonding pad are connected to the injection molding piece;

one of the first pad and the second pad is connected to a positive terminal of the connector, and the other is connected to a negative terminal of the connector.

Further, the injection molding part is provided with an extension part, and the extension part extends to the outer part of the sheet metal part;

the first pad and the second pad are connected to the extension portion, respectively.

In a second aspect, the present invention provides a USB interface assembly, including: a bottom case of the body and the USB interface device provided in the first aspect;

the USB interface device is inserted into the bottom shell of the machine body, and the positioning structure is matched with the bottom shell of the machine body.

Further, the bottom shell of the machine body is provided with a limiting portion, and the positioning structure abuts against the limiting portion.

Further, sealant is poured into the bottom shell of the body to fix the USB interface device.

Furthermore, a fit clearance is formed between the sheet metal part and the bottom shell of the machine body, and the sealant permeates and is solidified in the fit clearance.

In a third aspect, the invention provides an electric toothbrush provided with the above-mentioned USB interface device or USB interface assembly.

The USB interface device, the USB interface assembly component and the electric toothbrush provided by the invention have the following beneficial effects:

according to the USB interface device provided by the first aspect of the invention, the injection molding part is surrounded by the sheet metal part, the positioning structure matched with the bottom shell of the machine body is arranged on at least one of the injection molding part and the sheet metal part, the accurate installation and positioning of the USB interface device are ensured through the positioning structure, and the manufacturing cost of the device is reduced by omitting a circuit board.

According to the USB interface assembly component provided by the second aspect of the invention, the USB interface device is accurately positioned, so that the sealant can be conveniently filled into the gap between the sheet metal part and the inner wall of the bottom shell of the machine body, and the USB interface assembly component has a better waterproof effect. In addition, through the accurate installation location of USB interface device, can reduce the clearance of USB interface device and fuselage drain pan inner wall, and then avoid the encapsulating in-process sizing material to spill over.

The electric toothbrush provided by the third aspect of the invention adopts the low-cost USB interface device, simplifies the manufacturing process of the USB interface assembly component and has better waterproof effect.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a prior art Type-C assembly;

FIG. 2 is a schematic diagram of a USB interface device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a USB interface mounting assembly provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of a bottom case of a USB interface mounting assembly according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of position A of FIG. 3;

FIG. 6 is a first schematic diagram illustrating the connection of the connector, the first pad and the second pad of the USB interface device according to the first embodiment of the present invention;

fig. 7 is a first pin diagram of a USB interface device according to an embodiment of the present invention;

FIG. 8 is a second schematic diagram illustrating the connection of the connector, the first pad and the second pad of the USB interface device according to the embodiment of the present invention;

fig. 9 is a second pin diagram of a USB interface device according to an embodiment of the present invention.

Icon: 1-injection molding; 11-an extension; 2-sheet metal parts; 3-a positioning structure; 31-a first boss; 32-a second boss; 4-a bottom shell of the body; 41-a limiting part; 401-installation cavity; 5-a connector; 6-a first pad; 7-a second pad; 8-fit clearance; 1' -a circuit board; 2' -sealing ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

An embodiment of the first aspect of the present invention provides a USB interface device, as shown in fig. 2 and 3, the USB interface device is adapted to be inserted into a bottom case 4 of a body, and the USB interface device includes: an injection molding part 1 and a sheet metal part 2;

the sheet metal part 2 is coated on the injection molding part 1;

at least one of the injection molding part 1 and the sheet metal part 2 is provided with a positioning structure 3 matched with a bottom shell 4 of the machine body.

Specifically, USB interface device can be configured to Type-C device, and injection molding 1 or sheet metal component 2 are located to location structure 3, and perhaps, injection molding 1 and sheet metal component 2 are equipped with location structure 3 respectively. When the USB interface device is inserted into the bottom case 4 of the body, the positioning structure 3 is matched with the bottom case 4 of the body, so that the USB interface device can be accurately positioned in the bottom case 4 of the body.

In the present embodiment, the positioning structure 3 includes a protruding portion, the protruding portion protrudes in a direction perpendicular to the insertion direction, and the protruding portion is used for limiting the USB interface device in the insertion direction. As shown in fig. 3, the USB interface device is inserted into the bottom case 4 of the body along the direction a, and the positioning structure 3 abuts against the limiting portion 41 inside the bottom case 4 of the body, so as to limit the USB interface device in the insertion direction.

In one embodiment, the protruding portion and the injection molding part 1 are integrally formed, the injection molding part 1 with the positioning structure 3 is formed in an injection molding mode, and the protruding portion and the injection molding part 1 are integrally molded, so that the structure is simplified, and the manufacturing cost is reduced.

In another embodiment, the raised portion is formed by stamping the sheet metal part 2, and the sheet metal part 2 is formed with a convex point protruding outward by stamping, and this is used as the positioning structure 3. When the USB interface device is inserted into the bottom case 4 of the body, the positioning structure 3 is matched in the bottom case 4 of the body, so that the assembly position of the USB interface device is accurate. When the USB interface device assembly targets in place, the clearance of sheet metal component 2 and 4 inner walls of fuselage drain pan reduces and even approaches to zero, and then the sizing material spills over through the gap between sheet metal component 2 and 4 inner walls of fuselage drain pan when avoiding encapsulating.

Regarding the structure of the injection molded part 1, in detail:

as shown in fig. 3, a connector 5 for matching with an external USB device is arranged in the injection molding piece 1, and the injection molding piece 1 and the connector 5 are formed into a whole by injection molding. Wherein, connector 5 includes metal contact (or pin), makes injection molding 1 and connector 5 form an organic whole through the mode of moulding plastics.

As shown in fig. 2, a first land 6 and a second land 7 are connected to the injection-molded part 1, one of the first land 6 and the second land 7 is connected to the positive terminal of the connector 5, and the other is connected to the negative terminal of the connector 5. Wherein, injection molding 1 is equipped with extension 11, and extension 11 extends to the outside of sheet metal component 2, and injection molding 1 forms extension 11 through moulding plastics, and first pad 6 and second pad 7 are connected respectively in extension 11 to with connector 5 electricity continuous.

There are two types of wiring for the first pad 6 and the second pad 7, specifically:

in a first mode, as shown in fig. 6 and 7, pins a1 and B1 of the Type-C female socket are connected to the first pad 6, and the first pad 6 is used as a GND pad; pins a4 and B4 of the Type-C female socket are connected to the second pad 7, and the second pad 7 serves as a VBUS pad.

In a second way, as shown in fig. 8 and 9, pins a4 and B4 of the Type-C female socket are connected to the first pad 6, and the first pad 6 is used as a VBUS pad; the a12 and B12 pins of the Type-C female socket are connected to the second pad 7, and the second pad 7 serves as a GND pad.

The connection mode of the USB interface device provided in this embodiment can achieve the following effects:

the traditional USB interface device has 12 groups of connection wires, the embodiment simplifies the connection wires, the number of the original 12 groups is reduced to 2 groups, only two connection pads are reserved for charging, one connection pad is connected with a positive terminal (VBUS), and the other connection pad is connected with a negative terminal (GND). Only the first bonding pad 6 and the second bonding pad 7 are reserved, and the first bonding pad 6 and the second bonding pad 7 are used for being connected to the positive electrode and the negative electrode of the battery in a one-to-one correspondence mode, so that the requirement of the charging and discharging function of the battery is met.

Moreover, since the USB interface device in this embodiment adopts the above-mentioned wiring form, the USB interface device is simplified, and the specific analysis process is as follows:

as shown in FIG. 1, in the prior art Type-C assembly, a circuit board 1 ' is connected with a Type-C device, a sealing ring 2 ' is arranged between the Type-C device and a bottom shell 4 of a machine body, epoxy resin is filled in the bottom shell 4 of the machine body, and the circuit board 1 ' is covered by the epoxy resin, so that the waterproof performance of the Type-C assembly is realized.

In the embodiment, as shown in fig. 2 and 3, the sheet metal part 2 is used for surrounding the injection molding part 1, the positioning structure 3 matched with the bottom shell 4 of the machine body is arranged on at least one of the injection molding part 1 and the sheet metal part 2 to realize assembly positioning, the existing sealing ring is not needed to realize water prevention, a circuit board is omitted, and the manufacturing cost of the device is reduced.

Example two

As shown in fig. 3 and 4, an embodiment of a second aspect of the present invention is directed to a USB interface mounting assembly, including: a body bottom case 4 and the above-mentioned USB interface device;

the USB interface device is inserted in the bottom case 4 of the body, and the positioning structure 3 is matched with the bottom case 4 of the body.

The body bottom shell 4 has a mounting cavity 401, and two ends are respectively provided with an opening. The USB interface device is inserted into the mounting cavity 401 from the top opening of the body bottom case 4, and the external USB connector is detachably inserted into the USB interface device through the bottom opening of the body bottom case 4. When the USB interface device is inserted into the bottom case 4 of the body, the positioning structure 3 is matched with the bottom case 4 of the body, so that the accurate installation and positioning of the USB interface device are ensured. Wherein, location structure 3 is including setting up in the bellying of injection molding 1, and perhaps location structure 3 comprises the arch that the stamping of sheet metal component 2 formed. When the USB interface device is inserted in place, the positioning structure 3 is matched with the bottom shell 4 of the machine body, so that the USB interface device is limited in the inserting direction.

It should be noted that, after the USB interface device is inserted in place, the gap between the sheet metal part 2 and the inner wall of the bottom case 4 of the machine body is extremely small or zero, which not only ensures that the USB interface device is stably positioned in the bottom case 4 of the machine body, but also prevents the glue material from overflowing through the gap between the sheet metal part 2 and the bottom case 4 of the machine body.

As shown in fig. 3 and 4, the body bottom case 4 is provided with a stopper 41, and the positioning structure 3 abuts against the stopper 41.

Specifically, the limiting portion 41 includes a limiting boss protruding toward the inside of the body bottom case 4, and when the USB interface device is inserted into the body bottom case 4, the positioning structure 3 abuts against the limiting portion 41, so that the USB interface device is assembled and limited. As shown in fig. 3 and 4, the USB interface device is inserted between two limiting bosses, and the positioning structure 3 includes: the first boss 31 and the second boss 32, and the first boss 31 and the second boss 32 are abutted against the two limiting parts 41 in a one-to-one correspondence manner, so as to limit the position of the USB interface device in the bottom case 4 of the body.

The following describes the connection between the USB interface device and the bottom case 4 of the body in detail:

as shown in fig. 3 and 4, the bottom case 4 of the body is filled with sealant to fix the USB interface device.

When the USB interface assembly component is assembled, the USB interface device is inserted into the bottom case 4 of the machine body along the insertion direction, and the positioning structure 3 is abutted against the limiting part 41 to position the USB interface device. And then pouring sealant into the bottom shell 4 of the machine body, wherein the sealant can adopt epoxy resin. Through the solidification of the sealant, the positioning structure 3 is limited between the sealant and the limiting part 41, thereby realizing the fixation of the USB interface device.

As shown in fig. 2, 3 and 5, a fitting gap 8 is formed between the sheet metal part 2 and the bottom shell 4 of the fuselage, and the sealant penetrates and is cured in the fitting gap 8.

The width dimension of the fit clearance 8 decreases progressively along the insertion direction of the USB interface device, the sealant permeates into the fit clearance 8 along the insertion direction, and the width dimension of the fit clearance 8 decreases progressively or approaches zero, so that the rubber material is prevented from overflowing through the socket end of the USB interface device. The sealant which is infiltrated and solidified in the fit clearance 8 forms a tight package on the USB interface device, and can avoid water seepage in the fit clearance 8, so that the aim of water prevention is achieved, and the water prevention grade can meet the requirements of IPx 7.

EXAMPLE III

An embodiment of a third aspect of the present invention is to provide an electric toothbrush provided with the above-described USB interface device or USB interface mounting assembly.

The bottom case 4 of the body is configured as a tail cover of the electric toothbrush, and the accurate positioning of the USB interface device in the bottom case 4 of the body is ensured through the positioning structure 3. The sealing glue is poured into the bottom shell 4 of the machine body, and the sealing glue wraps the USB interface device, so that a sealing ring between the USB interface device and the bottom shell 4 of the machine body can be omitted, the production cost is reduced, and the waterproof effect of the assembly position of the USB interface device is improved. In addition, through location structure 3 location USB interface device, can ensure that the clearance of USB interface device and fuselage drain pan 4 is minimum, and then avoid the encapsulating material to spill over through cooperation clearance 8. In addition, the USB interface device simplifies wiring, only the first bonding pad 6 and the second bonding pad 7 are reserved under the condition that the charging requirement is met, the first bonding pad 6 and the second bonding pad 7 are connected to the injection molding part 1, a circuit board can be omitted, and further the production cost of the USB interface is reduced.

It should be noted that the USB interface device may be configured as a Type-C interface, and other interface devices may also be used.

In summary, the USB interface device, the USB interface assembly and the electric toothbrush have the following technical advantages:

1. the positioning structure 3 can be matched with the bottom shell 4 of the machine body, so that the accuracy of the installation position of the USB interface device is ensured; through the mode of USB interface device and the cooperation installation of fuselage drain pan 4, can reduce the clearance of USB interface device and fuselage drain pan 4, and then the sizing material overflows through the fit clearance when avoiding the encapsulating.

2. The sealant can penetrate into and be solidified in the fit clearance 8 between the USB interface device and the bottom shell 4 of the machine body, and the USB interface device is wrapped by the sealant, so that the waterproof effect of the USB interface assembly component is enhanced.

3. The positioning structure 3 is integrated with the injection molding part 1 in an injection molding mode, or the positioning structure 3 is formed by stamping the sheet metal part 2, a sealing ring and a circuit board are omitted, the structural composition and the manufacturing process of the USB interface device are simplified, and the production cost can be reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.