WO2018227939A1

WO2018227939A1 - Grounding terminal, grounding body, grounding structure and household appliance

Info

Publication number: WO2018227939A1
Application number: PCT/CN2017/119914
Authority: WO
Inventors: 黄俊郁; 尹小亮
Original assignee: 广东美的厨房电器制造有限公司; 美的集团股份有限公司
Priority date: 2017-06-13
Filing date: 2017-12-29
Publication date: 2018-12-20
Also published as: CN107331986B; CN107331986A

Abstract

A grounding structure, comprising a grounding terminal (1), a grounding body (2), and a screw (3) used for electrically connecting the grounding terminal (1) to the grounding body (2). The grounding terminal (1) is provided with a first flanged hole (102), and the screw (3) can pass through the grounding body (2) and is threadedly connected to the first flanged hole (102), so that a nut (30) of the screw (3) and the grounding terminal (1) are respectively abutted against two sides of the grounding body (2). According to the grounding terminal, a first flanged hole (102) is provided on the grounding terminal (1), so that the grounding terminal (1) and the nut (30) are respectively provided at two sides of the grounding body (2) to facilitate reducing parts. Also involved are a grounding terminal (1), a grounding body (2), and a household appliance.

Description

Ground terminal, grounding body, grounding structure and household appliances

Technical field

The invention relates to the field of household appliances. In particular, the present invention relates to a ground structure. On this basis, the invention also relates to a household appliance having the grounding structure. Furthermore, the invention relates to a ground terminal and a grounded body.

Background technique

A household appliance having a metal casing such as a microwave oven, a metal casing or the like needs to be grounded. An existing grounding structure is shown in FIG. 1 , which includes a screw 3 ′, a spring washer 5 ′, a grounding terminal 1 ′, a grounding body 2 ′ (ie, a metal casing), and the grounding body 2 ′ is flanged toward The lower side (ie, the direction away from the grounding terminal 1') of the flange hole 6', the screw 3' is mounted to the grounding body 2' via the spring washer 5', the screw 3' is self-flanging hole 6' The side on which the upper ground terminal 1' is mounted passes through the flange of the flange hole 6' and is connected to the screw 3' through the flange to fix the ground terminal 1' and the grounding body 2'.

Another existing grounding structure is shown in FIG. 2, which differs from the first grounding structure in that the flange hole 6' on the grounding body 2' is changed into a through hole 7', and the grounding body 2' The side of the flange of the upper flange hole 6' is provided with a nut 8' that cooperates with the screw 3'.

The common problem with the above two grounding structures is that the parts are small and the number is large, resulting in low production efficiency and high material cost.

Summary of the invention

The present invention provides a grounding structure that can have a reduced number of components.

In order to achieve the above object, an aspect of the present invention provides a grounding structure including a grounding terminal, a grounding body, and a screw for electrically connecting the grounding terminal to the grounding body, the grounding terminal being provided with a first flanged hole The screw can pass through the grounding body and be screwed to the first flange hole to be connected such that the nut of the screw and the grounding terminal respectively abut against two sides of the grounding body.

Preferably, the inner hole wall of the first flange hole is provided with a thread for screwing the screw.

Preferably, the ground terminal is provided with a protrusion on a side facing the ground body.

Preferably, the first flange hole extends from the connection end in a direction away from the ground body.

Preferably, the protrusions are a plurality of mutually separated, extending in a circumferential direction surrounding the first flange hole and having an inclined surface facing one side of the ground body, the inclined surface having abutting against the ground The edge of the body.

Preferably, the projection is located at a peripheral edge of the connecting end.

Preferably, an end of the first flange hole facing the ground body is formed with an inner chamfer.

Preferably, a side of the grounding body facing away from the grounding terminal is formed with a second flange hole, the screw being connectable to pass through the second flange hole and causing the nut to abut the second The free end of the flanged hole.

Another object of the present invention is to provide a home appliance including any of the above-described grounding structures.

Another object of the present invention is to provide a ground terminal that is suitable for use in the above-described ground structure.

In order to achieve the above object, another aspect of the present invention provides a ground terminal provided with a first flange hole for screwing to a screw to enable the screw to pass through the ground body and screwed thereto The grounding terminal is electrically connected to the grounding body, and is connected such that a nut of the screw and the grounding terminal respectively abut against two sides of the grounding body.

Another object of the present invention is to provide a grounding body, wherein the grounding body is formed with a second flanged hole, so as to be able to connect the grounding terminal through a screw passing through the second flanged hole, and is connected such that the screw The nut abuts against the free end of the second flange hole, and the ground terminal abuts against the other side of the ground body.

The beneficial effects of the present invention are as follows:

1. By providing a first flange hole on the grounding terminal, the grounding terminal and the nut can be respectively disposed on both sides of the grounding body, thereby facilitating reduction of parts;

2. The first flanged hole with internal thread on the grounding terminal replaces the nut matched with the screw in the prior art, and the protrusion on the grounding terminal replaces the spring washer in the prior art, so that the number of parts of the entire grounding structure is reduced. The material cost is reduced and the coating on the grounding body can be worn away by the nut during the process of connecting the screw to the grounding terminal;

3. The second flange hole is disposed on the grounding body. During the process of rotating the screw, the nut of the screw and the free end of the second flange hole are rubbed. The friction is more targeted against the plane of the nut that rubs the entire ground body. Sex, in addition to the coating effect is better.

DRAWINGS

1 is a schematic view of a first grounding structure mentioned in the background art;

2 is a schematic view of a second ground structure mentioned in the background art;

3 is a structural view of a ground terminal in a preferred embodiment;

4 is a structural view of another perspective view of the ground terminal depicted in FIG. 3;

Figure 5 is another perspective view of the grounding terminal for showing the position where the first flanged hole is disposed;

Figure 6 is a partial structural view of the grounding body;

Figure 7 is a schematic exploded view of the assembled structure of the ground structure.

detailed description

In the present invention, the orientation words such as "up, down, left, and right" as used generally refer to the upper, lower, left, and right as shown in the accompanying drawings; "inside and outside", unless otherwise specified. It refers to the inside and outside of the contour of each component itself.

As shown in FIG. 7, a grounding structure according to a preferred embodiment of the present invention includes a grounding terminal 1, a grounding body 2, and a screw 3 that sequentially passes through the grounding body 2 and the grounding terminal 1 and is screwed to the grounding terminal 1. .

Among them, the screw 3 generally includes a nut 30 that abuts against the grounding body 2 and a screw 31 that passes through the grounding body 2 and has an external thread. Therefore, since the present invention connects the ground terminal 1 and the nut 30 of the screw 3 to abut against the two sides of the grounding body 2, the nut and the like can be omitted, and the nut 30 can be utilized in the process of connecting the screw 3 The surface coating is removed by friction between the rotating body and the grounding body 2, which is convenient for improving production efficiency and material cost.

As shown in FIGS. 3 to 5, the above-mentioned ground terminal 1 may include a connection end 10 electrically connected to the ground body 2, and a lead end 11 to which the ground line 4 is connected. A first flange hole 102 is formed on the connecting end 10. The free end of the first flange hole 102 extends away from the ground body 2, and the inner hole wall of the first flange hole 102 may be provided with a thread 101. Generally, the connection end 10 and the lead end 11 of the ground terminal 1 have a small thickness in order to provide the structure or the like of the wound ground wire 4. In this case, the ground terminal 1 of the conventional structure cannot be connected to the screw 3 instead of the nut as described above. The present invention enhances the effective connection of the ground terminal 1 and the screw 3 by providing the first flange hole 102 on the ground terminal 1, whereby the ground terminal 1 can be disposed on the ground body 2 opposite to the nut 30 of the screw 3. One side, so that the nut 30 can directly contact and rub the ground body 2.

It should be noted that the thread 101 is not limited to a processing form in which the thread is previously tapped on the inner wall of the first flange hole 102, and the screw 3 can also be selected as a self-tapping screw, whereby the tapping screw During the screwing installation, the relative rotation of the screw 31 and the inner hole wall of the first flange hole 102 is utilized to form a thread 101 on the inner wall of the first flange hole 102.

In order to facilitate the connection of the screw 3 to the grounding terminal 1, an end of the first flanged hole 102 facing the grounding body 2 is further provided with an inner chamfer 104.

A protrusion 100 is disposed on a side of the connecting end 10 against the grounding body 2, and the number of the protrusions 100 is not limited to four as shown in FIG. 3 to FIG. 5, and the number thereof may be one or more, each convex The circumference of the protrusion 100 is disposed in a circumferential direction of the first flange hole 102, and is inclined from a low to a high direction in a direction surrounding the first flange hole 102. Thus, the extended end of the protrusion 100 is formed with an edge abutting against the ground body 2. Side 103. Thus, when the ground terminal 1 is connected to the ground body 2, the edge 103 can be compression-deformed to generate a pre-tightening force in the axial direction of the first flange hole 102, preventing the screw 3 from loosening. In this preferred embodiment, the spring washer can be omitted, further reducing the number of parts of the ground structure.

Also, as a preferred form of implementation, the projections 100 should be disposed at the outer peripheral edge of the connecting end 10. The connecting end 10 is provided with a first flange hole 102, and the protrusion 100 is arranged at the outer peripheral edge, so that the protrusion 100 can be arranged to have a larger size, thereby being able to provide a large elastic force by being compressed and deformed instead of the spring. The gasket produces a preload.

Preferably, as shown in FIG. 6, a side of the grounding body 2 disposed away from the grounding terminal 1 is provided with a second flanged hole 20. 6 and 7, the free end of the second flange hole 20 (the free end here is understood to be the flange of the second flange hole 20) is disposed away from the connection position of the ground terminal 1. During the relative rotation of the screw 3 and the grounding terminal 1, the lower side of the nut 30 can be rubbed against the flange end of the second flanged hole 20, thereby removing the insulating coating on the grounding body 2, thereby facilitating the grounding terminal 1 and grounding. Electrical connection between the bodies 3.

The grounding body 2 may be a metal casing of a household appliance such as a galvanized sheet, such as a metal casing of a microwave oven. The grounding structure described in this embodiment is used in a metal casing of a household appliance, thereby reducing the grounding structure of the metal casing. The number of parts. Moreover, during the screwing of the screw 3 to the first flange hole 102 on the ground terminal 1, the nut 30 rubs against the upper edge of the second flange hole 20, which is similar to the removal of the metal casing. Layer operation. It should be understood that although in the above description, the grounding body is mainly described in a connected state, the grounding structure of the present invention may be in an unassembled component state as long as its parts can correspond to the respective technologies defined by the technical solutions of the present invention. Features are all within the scope of protection of the present invention.

Further, the present invention provides a home appliance such as a microwave oven or the like having the above-described grounding structure provided by the present invention.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the invention is not limited thereto. Various simple modifications of the technical solution of the present invention can be made within the scope of the technical idea of the present invention. However, these simple variations and combinations are also considered to be the disclosure of the present invention, and are all within the scope of the present invention.

Claims

A grounding structure comprising a grounding terminal (1), a grounding body (2), and a screw (3) for electrically connecting the grounding terminal (1) to the grounding body (2), wherein The grounding terminal (1) is provided with a first flange hole (102), and the screw (3) can pass through the grounding body (2) and be screwed to the first flange hole (102) to be connected The nut (30) of the screw (3) and the grounding terminal (1) are respectively abutted on both sides of the grounding body (2).
The grounding structure according to claim 1, characterized in that the inner hole wall of the first flange hole (102) is provided with a thread (101) for screwing the screw (3).
The grounding structure according to claim 1, characterized in that the ground terminal (1) is provided with a protrusion (100) on a side facing the grounding body (2).
The grounding structure according to claim 3, wherein the first flange hole (102) extends from the connecting end (10) away from the grounding body (2).
The grounding structure according to claim 3, wherein said protrusions (100) are a plurality of mutually separated portions extending in a circumferential direction around said first flange hole (102) and having a direction toward said ground An inclined surface on one side of the body (2), the inclined surface having an edge (103) abutting against the grounding body (2).
The grounding structure according to claim 5, characterized in that the projection (100) is located at a peripheral edge of the connecting end (10).
The grounding structure according to claim 1, wherein an end of the first flanged hole (102) facing the grounding body (2) is formed with an inner chamfer (104).
The grounding structure according to any one of claims 1-7, wherein a side of the grounding body (2) facing away from the grounding terminal (1) is formed with a second flange hole (20). The screw (3) can be coupled to pass through the second flange hole (20) and cause the nut (30) to abut against the free end of the second flange hole (20).
A household appliance, characterized in that the household appliance comprises the grounding structure according to any one of claims 1-8.
A grounding terminal, characterized in that the grounding terminal (1) is provided with a first flange hole (102) for screwing to the screw (3), so as to enable the screw (3) to pass through the grounding body (2) screwing to the first flange hole (102) to electrically connect the ground terminal (1) to the ground body (2), and connected to a nut of the screw (3) (30) and the grounding terminal (1) respectively abut against both sides of the grounding body (2).
A grounding body is characterized in that a second flange hole (20) is formed on the grounding body (2) to connect the grounding terminal through a screw (3) passing through the second flange hole (20) (1) and connected such that the nut (30) of the screw (3) abuts against the free end of the second flange hole (20), the ground terminal (1) abuts against the ground body The other side of (2).