阅读说明：本技术 一种铰链组件及安装有该铰链组件的器具 (Hinge assembly and appliance provided with same ) 是由 刘国荣 李瑞友 张磊 何文华 齐哲 张珩 王德智 于 2017-03-31 设计创作，主要内容包括：本发明涉及一种铰链组件及安装有该铰链组件的器具,包括固定在本体上的铰链座,铰链座上设有第一铰链轴及第二铰链轴,第一铰链轴通过第一铰链臂与第三铰链轴连接,门体与第三铰链轴转动连接,第一铰链臂绕第一铰链轴转动,第二铰链轴连接第二铰链臂,第二铰链臂与门体之间设置有由驱动轴和驱动槽组成的运动副,当门体处于开启过程中时,运动副驱动门体在水平面上产生位移。本发明结构简单,而且门体在打开的过程中不与一侧的障碍物产生干涉,使门体开闭更加方便,且可实现家用电器和家具等器具可以自由嵌入的功能,方便用户安装使用。(The invention relates to a hinge assembly and an appliance provided with the hinge assembly, and the hinge assembly comprises a hinge seat fixed on a body, wherein the hinge seat is provided with a first hinge shaft and a second hinge shaft, the first hinge shaft is connected with a third hinge shaft through a first hinge arm, a door body is rotationally connected with the third hinge shaft, the first hinge arm rotates around the first hinge shaft, the second hinge shaft is connected with a second hinge arm, a kinematic pair consisting of a driving shaft and a driving groove is arranged between the second hinge arm and the door body, and when the door body is in an opening process, the kinematic pair drives the door body to displace on a horizontal plane. The invention has simple structure, and the door body does not interfere with an obstacle on one side in the opening process, so that the door body is more convenient to open and close, and the function that appliances such as household appliances and furniture can be freely embedded can be realized, thereby being convenient for users to install and use.)

1. A hinge assembly, characterized by: the door body is characterized by comprising a hinge seat fixed on a body, wherein a first hinge shaft and a second hinge shaft are arranged on the hinge seat, the first hinge shaft is connected with a third hinge shaft through a first hinge arm, a door body is rotationally connected with the third hinge shaft, the first hinge arm rotates around the first hinge shaft, the second hinge shaft is connected with a second hinge arm, a kinematic pair consisting of a driving shaft and a driving groove is arranged between the second hinge arm and the door body, and when the door body is in an opening process, the kinematic pair drives the door body to generate displacement on a horizontal plane.

2. The hinge assembly of claim 1, wherein the drive shaft is the third hinge shaft, and wherein the second hinge arm has a drive slot therein, and wherein the third hinge shaft is slidably disposed within the drive slot.

3. The hinge assembly of claim 2, wherein the third hinge shaft reciprocates within the drive slot when the door body is in the process of opening.

4. The hinge assembly of claim 2, wherein the driving slot includes a first end and a second end opposite to each other, the third hinge shaft slides gradually in the driving slot to the first end of the driving slot when the door body is opened from an initial closed position to a critical point state, and the third hinge shaft slides in the driving slot toward the second end when the door body is opened to a state of crossing the critical point.

5. The hinge assembly of claim 4, wherein the first end is farther from the second hinge axis than the second end.

6. The hinge assembly as claimed in claim 2, wherein when the door body is opened from an initial closed position to an initial opened position, the third hinge shaft slides in the driving slot to an end away from the second hinge shaft, and the door body is displaced in a first direction parallel to the body and away from an obstacle on a side of the body.

7. The hinge assembly as claimed in claim 2, wherein when the door body is opened from the initial closed position to the initial opened position, the third hinge shaft slides in the driving slot to an end away from the second hinge shaft, and the door body is displaced within an included angle between a first direction parallel to the body and away from the obstacle on one side of the body and a second direction parallel to the obstacle and away from the body.

8. The hinge assembly of claim 2, wherein a diamond-shaped portion is formed between a transverse edge of a plane where a front panel of the door body of the hinge assembly is located and a side edge perpendicular to the transverse edge, an obstacle is arranged on one side of the body, when the door body is opened from an initial closed position to a critical point state, the third hinge shaft gradually slides in the driving groove to an end portion of one end of the driving groove far away from the second hinge shaft, and the diamond-shaped portion moves towards a direction far away from the obstacle.

9. The hinge assembly as claimed in claim 8, wherein when the door body is opened to 90 ° beyond the critical point, the third hinge shaft slides back in the driving groove, and the diamond portion moves toward the direction approaching the obstacle.

10. The hinge assembly of claim 9, wherein when the door body continues to open more than 90 °, the third hinge shaft slides in the driving slot toward an end adjacent to the second hinge shaft, and the diamond-shaped portion moves away from the obstacle.

11. The hinge assembly of claim 1, wherein the first hinge arm and the second hinge arm are located on opposite sides of the hinge base.

12. The hinge assembly of claim 1, wherein the drive slot is a linear slot, or a curvilinear slot, or a dogleg slot.

13. An utensil, includes body and the door body that connects through the hinge subassembly, its characterized in that: the hinge assembly is as claimed in any one of claims 1 to 12.

Technical Field

The present invention relates to a hinge assembly and also to an appliance fitted with such a hinge assembly.

Background

With the gradual improvement of living standard, users have higher and higher requirements for household appliances such as washing machines, dish washing machines, refrigerators, freezers and the like. Like the most commonly used refrigerators in life, conventional refrigerator doors are all configured as single-shaft structures that rotate around a fixed rotating shaft. The hinge is not only single in structure, but also in the opening process of the door body, the water caltrop part formed between the transverse edge of the plane where the door body front panel of the door body close to the hinge is located and the side edge vertical to the transverse edge can move outwards, the edge of the water caltrop part exceeds the vertical plane where the side wall of the refrigerator body is located, the hinge is not suitable for being installed on an embedded refrigerator or a refrigerator with a small gap between the refrigerator body and a wall body, and the opening angle of the refrigerator door body is limited by the design of the hinge.

Disclosure of Invention

The invention mainly aims to provide a hinge assembly and an appliance provided with the hinge assembly.

In order to achieve the above object, an embodiment of the present invention provides a hinge assembly, which includes a hinge base fixed on a body, the hinge base is provided with a first hinge shaft and a second hinge shaft, the first hinge shaft is connected to a third hinge shaft through a first hinge arm, a door body is rotatably connected to the third hinge shaft, the first hinge arm rotates around the first hinge shaft, the second hinge shaft is connected to a second hinge arm, a kinematic pair composed of a driving shaft and a driving groove is provided between the second hinge arm and the door body, and when the door body is in an opening process, the kinematic pair drives the door body to displace on a horizontal plane.

As a further improvement of an embodiment of the present invention, the driving shaft is the third hinge shaft, the second hinge arm is provided with a driving groove, and the third hinge shaft is slidably disposed in the driving groove.

As a further improvement of an embodiment of the present invention, when the door body is in an opening process, the third hinge shaft reciprocates in the driving groove.

As a further improvement of an embodiment of the present invention, the driving groove includes a first end and a second end that are opposite to each other, when the door body is opened from an initial closed position to a critical point state, the third hinge shaft gradually slides in the driving groove to the first end of the driving groove, and when the door body is opened to a state of crossing the critical point, the third hinge shaft slides in the driving groove toward the second end.

As a further improvement of an embodiment of the present invention, the first end is farther from the second hinge axis than the second end.

As a further improvement of an embodiment of the present invention, when the door body is opened from the initial closed position to the initial opened state, the third hinge shaft slides in the driving slot to an end away from the second hinge shaft, and the door body is displaced in a first direction, where the first direction is parallel to the body and is away from the obstacle on the side of the body.

As a further improvement of an embodiment of the present invention, when the door body is opened from the initial closed position to the initial opened state, the third hinge shaft slides in the driving slot to an end away from the second hinge shaft, and the door body is displaced within an included angle range between a first direction and a second direction, where the first direction is parallel to the body and is away from the obstacle on the side of the body, and the second direction is parallel to the obstacle and is away from the body.

As a further improvement of an embodiment of the present invention, a diamond-shaped portion is formed between a lateral side of the door body close to a plane of a door body front panel of the hinge assembly and a lateral side perpendicular to the lateral side, an obstacle is disposed on one side of the body, when the door body is opened from an initial closed position to a critical point state, the third hinge shaft gradually slides in the driving groove to an end of the driving groove far from one end of the second hinge shaft, and the diamond-shaped portion moves towards a direction far from the obstacle.

As a further improvement of an embodiment of the present invention, when the door body is opened to 90 ° beyond the critical point, the third hinge shaft slides back in the driving groove, and the diamond-shaped part moves toward the direction approaching the obstacle.

As a further improvement of one embodiment of the present invention, when the door body is opened to more than 90 °, the third hinge shaft slides to an end close to the second hinge shaft in the driving slot, and the diamond-shaped part moves away from the obstacle.

As a further improvement of an embodiment of the present invention, the first hinge arm and the second hinge arm are located on opposite sides of the hinge base.

As a further improvement of an embodiment of the present invention, the driving groove is a linear groove, a curved groove, or a polygonal groove.

In order to achieve the above object, an embodiment of the present invention provides an appliance, including a body and a door body connected by a hinge assembly, where the hinge assembly is the hinge assembly according to any one of the above technical solutions.

In summary, the hinge assembly and the appliance provided with the hinge assembly provided by the invention have simple structures, and by respectively arranging three hinge shafts on the body and the door body, and correspondingly arranging a sliding pair consisting of the driving groove and the third hinge shaft and a rotating pair consisting of the third hinge shaft and the first hinge arm between the door body and the hinge seat, in the process of opening and closing the door body, the third hinge shaft slides in the driving groove to provide driving force for the door body while rotating around the first hinge shaft and the second hinge shaft, so that the door body generates a certain displacement on the horizontal plane, and further the door body does not interfere with an obstacle on one side in the opening process, and meanwhile, a door sealing strip between the body and the door body is not compressed, thereby the opening and closing of the door body are more convenient, the function of freely embedding appliances such as a refrigerator and the like can be realized, namely, a user can embed and use one common appliance, or may be used independently.

The hinge assembly can be installed on household appliances with door bodies, such as washing machines, dish washing machines, refrigerators, freezers and the like, can also be installed on furniture with door bodies, and can also be used for other articles which are mutually rotated to be opened and closed through hinge connection.

Drawings

FIG. 1 is a schematic view of the refrigerator structure of the present invention;

FIG. 2 is a schematic view of a hinge assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the hinge assembly of the present invention with the door body in the initial closed position;

FIG. 4 is a schematic structural view of a hinge assembly when the door body of the present invention is in a preliminary open state;

FIG. 5 is a schematic view of the hinge assembly configuration of the door body of the present invention at a threshold point of closest approach to an obstacle;

FIG. 6 is a schematic view of the hinge assembly configuration after the door body of the present invention has crossed a critical point;

FIG. 7 is a schematic view of the hinge assembly structure of the door of the present invention as it opens to 90 degrees;

FIG. 8 is a schematic view of the hinge assembly configuration of the present invention with the door body opened to greater than 90 degrees;

fig. 9 is a schematic view of the hinge assembly structure when the door body of the present invention is opened to the maximum angle.

As shown in fig. 1 to 9, the door body 1, the door body 2, the hinge assembly 3, the barrier 4, the hinge base 5, the vertical plate 5a, the horizontal plate 5b, the first hinge shaft 6, the second hinge shaft 7, the first hinge arm 8, the second hinge arm 9, the driving groove 10, the third hinge shaft 11, the upper section 11a, the lower section 11b, the middle section 11c, the slider 12, and the diamond-shaped portion 13.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

the first embodiment is as follows:

as shown in fig. 1, the present invention provides a hinge assembly, which is installed between a body 1 and a door 2, and in this embodiment, the hinge assembly 3 is described in detail by taking a double-door refrigerator as an example, wherein the body 1 refers to a cabinet of the refrigerator, the refrigerator is placed against an obstacle 4, and the obstacle 4 may be a cabinet body when being embedded and a wall body when being arranged close to a wall.

As shown in fig. 2, the hinge assembly 3 includes a hinge base 5 fixed to the body 1, and the hinge base 5 serves to support the entire hinge assembly 3. The hinge base 5 is composed of a vertical plate 5a and a horizontal plate 5b, and the vertical plate 5a and the horizontal plate 5b are integrally formed by bending metal plates or fixedly connected by welding. Wherein the vertical plate 5a is fixed to the body 1 by a fastener such as a screw, and the horizontal plate 5b is parallel to the bottom surface of the door body 2.

A first hinge shaft 6 and a second hinge shaft 7 are vertically fixed on the horizontal plate 5b, the first hinge shaft 6 is rotatably connected with a first hinge arm 8, the second hinge shaft 7 is rotatably connected with a second hinge arm 9, the first hinge arm 8 and the second hinge arm 9 are parallel to the bottom surface of the door body 2, the first hinge arm 8 can rotate 360 degrees around the first hinge shaft 6, the second hinge arm 9 can rotate 360 degrees around the second hinge shaft 7, and a driving groove 10 is formed in the second hinge arm 9. The first hinge arm 8 and the second hinge arm 9 may be disposed on the same side of the horizontal plate 5b, and in this embodiment, it is preferable that the first hinge arm 8 is disposed below the horizontal plate 5b, and the second hinge arm 9 is disposed above the horizontal plate 5b, and at this time, the driving groove 10 is a groove penetrating vertically, so that the hinge assembly 3 is more compact in structure and easy to mount.

The hinge assembly 3 further comprises a third hinge shaft 11, the third hinge shaft 11 penetrates through the driving groove 10, the bottom of the third hinge shaft 11 is rotatably connected with the first hinge arm 8, and the top of the third hinge shaft 11 is fixedly connected with the door body 2. The third hinge shaft 11 rotates about the first hinge shaft 6 and slides along the driving slot 10. In order to avoid the third hinge axis 11, a concave portion is provided on the horizontal plate 5b of the hinge base 5.

In order to make the sliding of the third hinge shaft 11 in the driving slot 10 smoother, the third hinge shaft 11 is connected with the driving slot 10 by a sliding block 12. The structure of the sliding block 12 is matched with that of the driving groove 10, so that the sliding block 12 can slide stably in the driving groove 10, and the third hinge shaft 11 is fixedly connected with the sliding block 12.

As shown in fig. 2 and 3, the third hinge shaft 11 is divided into an upper section, a middle section and a lower section, the cross section of the upper section 11a is preferably square, a square shaft hole is correspondingly arranged on the bottom surface of the door body 2, and the top of the upper section 11a of the third hinge shaft 11 is inserted into the shaft hole for fixed connection, so that the installation is convenient, and the third hinge shaft 11 and the door body 2 do not rotate relatively; the cross section of the middle section 11c is preferably square, a square shaft hole is correspondingly arranged on the sliding block 12, and the middle section 11c of the third hinge shaft 11 is inserted into the shaft hole for fixed connection, so that the installation is convenient, and the third hinge shaft 11 and the sliding block 12 can not rotate relatively; the lower section 11b has a circular cross-section allowing the third hinge shaft 11 to rotate around the first hinge arm 8.

A damper (not shown in the figure) can be further arranged between the first hinge arm 8 or the second hinge arm 9 and the body 1, so that the opening and closing process of the door body 2 is more stable, and the door body 2 cannot be damaged due to overlarge door opening and closing force.

The driving groove 10 can be a straight line groove enclosed by two parallel edges and two semicircular arcs at two ends as shown in fig. 3, and the shape and size of the sliding block 12 are matched with the width between the two parallel edges and the radius of the semicircular arc of the driving groove 10, so that the sliding block 12 can slide smoothly in the driving groove 10, and no large shaking is generated. The driving slot 10 may also be a curved slot, which may be an arc or an S-shaped curve, or a broken slot, which may be L-shaped, V-shaped, U-shaped, etc., and when this structure is adopted, the shape and size of the slider 12 are suitable for turning and changing the moving direction in the driving slot 10.

As shown in fig. 3, when the door 2 is in the initial closing position, the second hinge axis 7 is located on a side of the first hinge axis 6 facing the obstacle 4, and the third hinge axis 11 is located on a side of the first hinge axis 6 facing the body 1. The centre axis of the second hinge arm 9 is at an angle to the centre axis of the first hinge arm 8. At this time, the third hinge shaft 11 is located at an end of the driving slot 10 close to the second hinge shaft 7 and at a distance from the end, i.e., at a position where the third hinge shaft 11 is close to the middle of the driving slot 10.

When the door body 2 is positioned at the initial closing position, the water caltrop part 13 formed between the transverse edge of the plane of the door body front panel of the hinge assembly 3 and the side edge vertical to the transverse edge of the door body 2 contacts with the obstacle 4 at one side.

As shown in fig. 3, in the process of opening and closing the door body 2, a sliding pair is formed in the middle between the driving groove 10 on the second hinge arm 9 and the third hinge shaft 11, and a rotating pair is formed between the bottom of the third hinge shaft 11 and the second hinge arm 9, when the third hinge shaft 11 rotates around the first hinge shaft 6, the third hinge shaft 11 also rotates around the second hinge shaft 7, and the third hinge shaft 11 slides in the driving groove 10, so that a driving force is given to the door body 2, and the door body 2 (i.e. the connection point of the door body 2 and the third hinge shaft 11) generates a reciprocating displacement in the included angle range (C direction in the figure) between the a direction (the direction parallel to the body 1) and the B direction (the direction parallel to the obstacle 4) shown in fig. 3, and a compound motion of the door body 2 in the C direction, the rotation around the first hinge shaft 6 and the rotation around the second hinge shaft 7 is realized.

In the process of opening the door body 2, through the compound motion, the door body 2 generates inward displacement (in the direction away from the barrier 4) in the direction a, and meanwhile, the door body 2 generates displacement in the direction B in the direction away from the body 1, namely, the water caltrop part 13 of the door body 2 moves outwards (in the direction B away from the body 1) while moving in the direction (in the direction a) away from the barrier 4, so that the door body 2 does not interfere with the barrier 4 on one side in the opening process, and the door sealing strip (not shown in the figure) between the door body 2 and the body 1 can be effectively prevented from being compressed in the process of opening and closing the door body 2, and the service life of the door sealing strip can be effectively prolonged.

As shown in fig. 4, when the door 2 is in the initial opening state, the first hinge arm 8 rotates counterclockwise around the first hinge shaft 6, the second hinge arm 9 rotates counterclockwise around the second hinge shaft 7, and the third hinge shaft 11 slides along the driving slot 10 while rotating counterclockwise around the first hinge shaft 6. During the process that the third hinge shaft 11 slides in the driving groove 10, the third hinge shaft 11 gives a driving force to the door body 2. The third hinge shaft 11 slides from an initial position close to the middle to an end far from the second hinge shaft 7 in the driving slot 10, so that the door body 2 rotates around the first hinge shaft 6 and simultaneously displaces in an included angle range between the direction a and the direction B (the direction C in the figure), and even if the door body 2 displaces in the direction a inwards (the direction far from the obstacle 4), the door body 2 also displaces in the direction B far from the body 1. At this moment, the water caltrop part 13 of the door body 2 is gradually far away from the barrier 4, and the outermost end of the water caltrop part 13 cannot exceed the plane of the outer wall of the body 1 in the opening process, so that the door body 2 cannot interfere with the barrier 4 on one side in the opening process, and meanwhile, the door body 2 cannot compress a door sealing strip between the door body 2 and the body 1. In the process, although the door body 2 generates inward displacement in the horizontal direction, the whole door body 2 cannot interfere with the other door body 2 opposite to the door body 2, and the smooth door opening process is ensured.

As shown in fig. 5, the door 2 is opened to a critical point state, where the diamond-shaped portion 13 is at a maximum distance away from the obstacle 4, and the third hinge shaft 11 slides continuously in the driving slot 10 from the middle position in fig. 4 to an end of the driving slot 10 away from the second hinge shaft 7, at which time the first hinge arm 8 and the second hinge arm 9 are overlapped or parallel. If a curved slot is used for the drive slot 10, the tangent of the drive slot 10 now coincides with or is parallel to the first hinge arm 8.

As shown in fig. 6, after the door 2 is opened beyond the threshold point, the diamond-shaped portion 13 starts to move from a position far away from the obstacle 4 to a position close to the obstacle 4, and at this time, the third hinge shaft 11 slides back in the driving slot 10, i.e., slides to a position close to one end of the second hinge shaft 7, and the third hinge shaft 11 continues to rotate around the first hinge shaft 6 and the second hinge shaft 7.

As shown in fig. 7, when the door 2 is opened to 90 °, the third hinge shaft 11 continues to rotate around the first hinge shaft 6 and the second hinge shaft 7, the third hinge shaft 11 slides back to a certain distance in the driving slot 10, and the front panel of the door 2 is parallel to and close to the obstacle 4. At this time, the diamond portion 13 contacts or is closest to the obstacle 4 depending on the size of the hinge assembly 3 itself, the size of the door body 2, the mounting position of the hinge assembly 3 on the door body 2, and the angle between the first hinge arm 6 and the second hinge arm 7 at the initial position.

As shown in fig. 8, when the door 2 is opened further to more than 90 °, the third hinge shaft 11 continues to rotate around the first hinge shaft 6 and the second hinge shaft 7, and the third hinge shaft 11 slides back in the driving slot 10 and continues to slide toward the end near the second hinge shaft 7 through the middle position. In the process, the diamond-shaped part 13 starts to move from a position close to the obstacle 4 to a direction away from the obstacle 4.

As shown in fig. 9, when the door 2 is opened to a maximum angle of 135 °, the third hinge shaft 11 rotates around the first hinge shaft 6 and the second hinge shaft 7, and the third hinge shaft 11 slides back in the driving slot 10 to an end near one end of the second hinge shaft 7. At this time, the diamond-shaped portions 13 are at the farthest positions from the obstacle 4.

The maximum opening angle of the door body 2 may also be greater than 135 °, depending on the size of the hinge assembly 3 itself, the size of the door body 2, the mounting position of the hinge assembly 3 on the door body 2, and the angle between the first hinge arm 6 and the second hinge arm 7 in the initial position.

The hinge assembly 3 has a simple structure, three hinge shafts are respectively arranged on the body 1 and the door body 2, a sliding pair consisting of the driving groove 10 and the third hinge shaft 11 and a rotating pair consisting of the third hinge shaft 11 and the first hinge arm 6 are correspondingly arranged between the door body 1 and the hinge seat 5, and in the opening and closing process of the door body 2, the third hinge shaft 11 slides in the driving groove 10 to drive the door body 2 to generate certain displacement on the horizontal plane by driving force for the door body 2 while rotating around the first hinge shaft 6 and the second hinge shaft 7, so that the door body 2 does not interfere with the obstacle 4 on one side in the opening process, and meanwhile, the door sealing strip between the body 1 and the door body 2 is not compressed, thereby the opening and closing of the door body 2 are more convenient, the function of freely embedding appliances such as a refrigerator and the like can be realized, namely, a user can embed one ordinary appliance, or may be used independently.

Example two:

the difference from the first embodiment is that in the present embodiment, the first hinge arm 8 is preferably disposed above the horizontal plate 5b, and the second hinge arm 9 is preferably disposed below the horizontal plate 5 b. The top of the third hinge shaft 11 is fixedly connected with the door body 2, the middle of the third hinge shaft is rotatably connected with the first hinge arm 6, the bottom of the third hinge shaft is fixedly connected with the sliding block 12, and the sliding block 12 slides in the driving groove 10.

The third hinge shaft 11 is divided into an upper section, a middle section and a lower section, the cross section of the upper section 11a is preferably square, a square shaft hole is correspondingly arranged on the bottom surface of the door body 2, and the top of the upper section 11a of the third hinge shaft 11 is inserted into the shaft hole for fixed connection. The cross section of the middle section 11c is round and is rotationally connected with the first hinge shaft 6, the cross section of the lower section 11b is preferably square, a square shaft hole is correspondingly arranged on the sliding block 12, and the lower section 11b of the third hinge shaft 11 is inserted into the shaft hole and fixedly connected. In this structure, the movement locus of the third hinge shaft 11 is the same as that of the first embodiment.

Example three:

the invention also provides a device, as shown in fig. 1, the device can be a household appliance including a washing machine, a dish washing machine, a refrigerator and a freezer, the household appliance comprises a body 1 and a door body 2, a hinge assembly 3 is arranged between the body 1 and the door body 2, an upper group of hinge assembly 3 and a lower group of hinge assembly 3 are arranged on one side edge of the door body 2, the gravity centers of the two groups of hinge assemblies 3 are overlapped, and the door body 2 is ensured to be opened and closed stably. The appliance can also be furniture with a door body, such as various cabinets, book cabinets, wardrobes, writing desks, office tables and the like.

Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.