CN219492026U - Novel door hinge structure - Google Patents

Abstract

The utility model discloses a novel door hinge structure, which is reasonable in structural design, and because the upper left, the lower left, the upper right and the lower right sides of a rocker arm assembly are respectively provided with a sliding block assembly, when a first connecting arm and a fourth connecting arm slide along a sliding chute, the sliding block assembly rotates around a third connecting arm and a second connecting arm, so that the rocker arm assembly drives the sliding block assembly to perform opening and closing movement. The function is as follows: the upper end and the lower end of the third connecting arm are respectively provided with a circular rubber sleeve and are arranged in the rotating holes of the sliding block assemblies on the upper left side and the lower left side, and the upper end and the lower end of the second connecting arm are respectively provided with a circular rubber sleeve and are arranged in the rotating holes of the sliding block assemblies on the upper right side and the lower right side, so that the middle plane bearing in the existing hinge is changed into the circular rubber sleeve.

Description

Novel door hinge structure

Technical Field

The utility model relates to the technical field of hinges, in particular to a novel door hinge structure.

Background

At present, a general hinge is arranged on a door body in the market, and when the hinge faces different door bodies in different structures in the installation process, the hinge lacks an adjusting function; a further part of the hinges may use bearings, which may increase the cost. Meanwhile, most of zinc alloy materials and aluminum alloy materials are adopted in the market at present to manufacture hinges, so that the problems of low bearing, insufficient strength of a designed rocker arm and the like of the structural design and the materials are caused, a large amount of abrasion exists in the installation process of the products made of the materials, and finally the door leaf is easy to fall down in the use process.

Disclosure of Invention

The utility model aims to provide a novel door hinge structure so as to solve the technical problem of high cost of using a bearing in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model provides a novel door hinge structure, which comprises a rocker arm assembly, wherein the rocker arm assembly comprises a first rocker arm and a second rocker arm, the first rocker arm comprises two arc-shaped cantilevers which are distributed vertically symmetrically, the left sides of the two arc-shaped cantilevers are connected through a first connecting arm, the middle part and the right side of the arc-shaped cantilever are sequentially provided with a first positioning hole and a second positioning hole which penetrate vertically, and the second positioning holes of the two arc-shaped cantilevers are connected through a second connecting arm; the second rocker arm comprises an arc-shaped rotating arm, a third connecting arm and a fourth connecting arm which extend vertically are respectively arranged on the left side and the right side of the arc-shaped rotating arm, and a third positioning hole penetrating up and down is formed in the middle of the arc-shaped rotating arm; the arc cantilever and the arc rotating arm are arranged in the first rocker arm, the third connecting arm and the fourth connecting arm are respectively arranged on the front side and the rear side of the first rocker arm, and the first positioning hole and the third positioning hole are coaxially arranged and are connected in a rotating way through the middle rotating shaft; the upper left side, the lower left side, the upper right side and the lower right side of the rocker arm assembly are respectively provided with a sliding block assembly, one side of the upper left side and the lower left side, which faces the rocker arm assembly, is provided with a sliding groove for sliding a first connecting arm, one side of the upper right side and the lower right side, which faces the rocker arm assembly, is provided with a sliding groove for sliding a fourth connecting arm, one side of the upper left side and the lower left side, which faces the rocker arm assembly, is also provided with a rotating hole for rotating a third connecting arm, and one side of the upper right side and the lower right side, which faces the rocker arm assembly, is also provided with a rotating hole for rotating a second connecting arm; the upper and lower both ends of third linking arm are equipped with circular gum cover respectively and install in the rotation hole of the slider subassembly of upper left side, lower left side, the upper and lower both ends of second linking arm are equipped with circular gum cover respectively and install in the rotation hole of the slider subassembly of upper right side, lower right side.

Further, the left and right sides of rocking arm subassembly are equipped with the shell respectively, the shell is equipped with the opening towards one side of rocking arm subassembly, and the slider subassembly of upper left side, lower left side passes the opening and locates in the shell of left side, and the slider subassembly of upper right side, lower right side passes the opening and locates in the shell of right side.

Further, the middle part of shell is equipped with the mounting groove, the slider subassembly includes slider base and installation locating plate, the installation locating plate is located slider base perpendicularly and is kept away from one side of rocking arm subassembly, the slider base is located in the mounting groove, the installation locating plate is installed in the outside upper and lower side of mounting groove.

Further, a plurality of screw holes are formed in the installation positioning plate, and the screw holes of the installation positioning plate are fixedly connected with the shell through screws; the slide block bases of the slide block assemblies on the upper right side and the lower right side are provided with adjusting screw holes for installing adjusting screws.

Further, the upper and lower ends of the first connecting arm are respectively provided with square rubber sleeves and are arranged in the sliding grooves of the sliding block assemblies on the upper left side and the lower left side, and the upper and lower ends of the fourth connecting arm are respectively provided with square rubber sleeves and are arranged in the sliding grooves of the sliding block assemblies on the upper right side and the lower right side.

Further, one side of the sliding block component facing the rocker arm component is further provided with a fixing hole for installing a balance supporting ejector rod, the balance supporting ejector rod is connected between the fixing holes of the sliding block components on the upper left side and the lower left side, the balance supporting ejector rod is connected between the fixing holes of the sliding block components on the upper right side and the lower right side, one of the balance supporting ejector rods is arranged between the first connecting arm and the third connecting arm, and the other balance supporting ejector rod is arranged between the second connecting arm and the fourth connecting arm.

Further, the upper end and the lower end of the balance support ejector rod are fixedly connected with the sliding block component through inner hexagonal positioning columns respectively.

Further, the included angle between the slider assemblies at the left and right sides may be varied in the range of 0 to 180 degrees.

Further, the middle parts of the first connecting arm, the third connecting arm and the fourth connecting arm are respectively provided with an integrally formed pin, the pins are cylindrical, the upper end and the lower end of each pin are protruded out of the first connecting arm, the third connecting arm and the fourth connecting arm, and the second connecting arm is cylindrical.

Further, the rocker arm assembly and the sliding block assembly are made of carbon steel.

In summary, the technical scheme of the utility model has the following beneficial effects: the utility model has reasonable structural design, the upper and lower ends of the third connecting arm are respectively provided with the circular rubber sleeves and are arranged in the rotating holes of the sliding block assemblies on the upper left side and the lower left side, and the upper and lower ends of the second connecting arm are respectively provided with the circular rubber sleeves and are arranged in the rotating holes of the sliding block assemblies on the upper right side and the lower right side, so that the middle plane bearing in the existing hinge is changed into the circular rubber sleeve, and the circular rubber sleeve has elasticity and is low in cost, so that the change can not only adjust the unbalanced stress caused by external force in use, but also save the production cost.

Drawings

FIG. 1 is a schematic diagram of an explosive structure of the present utility model;

FIG. 2 is a schematic view of a first rocker arm construction of the present utility model;

FIG. 3 is a schematic view of a second rocker arm construction of the present utility model;

FIG. 4 is a schematic view of a first view of the first rocker arm of the present utility model assembled with a second rocker arm;

FIG. 5 is a second perspective schematic view of the first rocker arm and second rocker arm assembly of the present utility model;

FIG. 6 is a detailed schematic of the slider assembly of the present utility model;

FIG. 7 is a schematic illustration of the structural distribution of the slider assembly of the present utility model;

FIG. 8 is a schematic view of the overall structure of the present utility model;

FIG. 9 is a schematic perspective view of the utility model with the housing removed;

FIG. 10 is a schematic top view of the present utility model;

FIG. 11 is a schematic view of the process of the present utility model when installed in a door leaf or frame;

reference numerals illustrate: the novel door lock comprises the following components of a first rocker arm, a 101-arc cantilever, a 102-first connecting arm, a 103-first positioning hole, a 104-second positioning hole, a 105-second connecting arm, a 2-second rocker arm, a 201-arc rotating arm, a 202-third connecting arm, a 203-fourth connecting arm, a 204-third positioning hole, a 3-middle rotating shaft, a 4-sliding block assembly, a 401-sliding groove, a 402-rotating hole, a 403-sliding block base, a 4031-adjusting screw hole, a 404-mounting positioning plate, a 4041-screw hole, a 405-fixing hole, a 5-round rubber sleeve, a 6-shell, a 601-opening, a 602-mounting groove, a 7-square rubber sleeve, an 8-balance supporting ejector rod, a 9-inner hexagonal positioning column, a 10-pin, a 11-door leaf and a 12-door frame.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, but the scope of protection of the present utility model is not limited.

In the present utility model, for a clearer description, the following description is made: the observer views fig. 4, where the left side of the observer is left, the right side of the observer is right, the front of the observer is front, the rear of the observer is rear, the upper side of the observer is upper, and the lower side of the observer is lower, it should be noted that the terms "front end", "rear end", "left side", "right side", "middle part", "upper" and "lower" in this text indicate orientations or positional relationships based on the orientations or positional relationships set forth in the drawings, and are merely for convenience in clearly describing the present utility model, and do not indicate or imply that the structures or components to be referred to must have specific orientations, be configured in specific orientations, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth" and the like are used for clarity or to simplify the description, and are not to be construed as indicating or implying a relative importance or quantity.

Referring to fig. 1 to 11, the present embodiment provides a novel door hinge structure, including a rocker arm assembly, where the rocker arm assembly includes a first rocker arm 1 and a second rocker arm 2, the first rocker arm 1 includes two arc-shaped cantilevers 101 that are distributed symmetrically up and down, left sides of the two arc-shaped cantilevers 101 are connected by a first connecting arm 102, a first positioning hole 103 and a second positioning hole 104 that penetrate up and down are sequentially provided in the middle part and right sides of the arc-shaped cantilevers 101, and the second positioning holes 104 of the two arc-shaped cantilevers 101 are connected by a second connecting arm 105; the second rocker arm 2 comprises an arc-shaped rotating arm 201, wherein a third connecting arm 202 and a fourth connecting arm 203 which extend vertically are respectively arranged on the left side and the right side of the arc-shaped rotating arm 201, and a third positioning hole 204 which penetrates up and down is formed in the middle of the arc-shaped rotating arm 201; the arc cantilever 101 and the arc rotating arm 201 are directed forward in the arc direction, the arc rotating arm 201 is arranged in the first rocker arm 1, the third connecting arm 202 and the fourth connecting arm 203 are respectively arranged on the front side and the rear side of the first rocker arm 1, and the first positioning hole 103 and the third positioning hole 204 are coaxially arranged and are connected in a rotating way through the middle rotating shaft 3; the upper left side, the lower left side, the upper right side and the lower right side of the rocker arm assembly are respectively provided with a sliding block assembly 4, a sliding groove 401 for sliding the first connecting arm 102 is formed in the side, facing the rocker arm assembly, of the upper left side and the lower left side of the sliding block assembly 4, a sliding groove 401 for sliding the fourth connecting arm 203 is formed in the side, facing the rocker arm assembly, of the upper left side and the lower left side of the sliding block assembly 4, a rotating hole 402 for rotating the third connecting arm 202 is formed in the side, facing the rocker arm assembly, of the upper right side and the lower right side of the sliding block assembly 4, and a rotating hole 402 for rotating the second connecting arm 105 is formed in the side, facing the rocker arm assembly, of the sliding block assembly 4; the upper and lower ends of the third connecting arm 202 are respectively provided with a circular rubber sleeve 5 and are arranged in the rotating holes 402 of the slide block assemblies 4 on the left upper side and the left lower side, and the upper and lower ends of the second connecting arm 105 are respectively provided with a circular rubber sleeve 5 and are arranged in the rotating holes 402 of the slide block assemblies 4 on the right upper side and the right lower side. The function is as follows: the upper end and the lower end of the third connecting arm are respectively provided with a circular rubber sleeve and are arranged in the rotating holes of the sliding block assemblies on the upper left side and the lower left side, and the upper end and the lower end of the second connecting arm are respectively provided with a circular rubber sleeve and are arranged in the rotating holes of the sliding block assemblies on the upper right side and the lower right side, so that the middle plane bearing in the existing hinge is changed into the circular rubber sleeve. Working principle: (1) Because the first rocker arm is U-shaped as a whole and the second rocker arm is I-shaped as a whole, the second rocker arm can conveniently enter the first rocker arm, and meanwhile, the I-shaped design can also improve the bearing capacity of the rocker arm structure; (2) The first rocker arms and the second rocker arms are arranged in a staggered manner, namely, the first positioning holes of the first rocker arms and the third positioning holes of the second rocker arms are connected into a whole through the rotation of the middle shaft, so that the assembly efficiency is improved, and mass production is easy to realize; (3) Because the upper left, lower left, upper right and lower right sides of the rocker arm assembly are respectively provided with the slider assembly, when the first connecting arm and the fourth connecting arm slide along the sliding chute, the slider assembly rotates around the third connecting arm and the second connecting arm, so that the rocker arm assembly drives the slider assembly to perform opening and closing movement.

Specifically, the left and right sides of the rocker arm assembly are respectively provided with a housing 6, one side of the housing 6 facing the rocker arm assembly is provided with an opening 601, the upper left and lower left slider assemblies 4 pass through the opening 601 and are arranged in the left housing 6, and the upper right and lower right slider assemblies 4 pass through the opening 601 and are arranged in the right housing 6. The function is as follows: the shell is arranged to better protect the rocker arm assembly and the sliding block assembly.

Specifically, the middle part of the housing 6 is provided with a mounting groove 602, the slider assembly 4 comprises a slider base 403 and a mounting positioning plate 404, the mounting positioning plate 404 is vertically arranged on one side of the slider base 403 far away from the rocker arm assembly, the slider base 403 is arranged in the mounting groove 602, and the mounting positioning plate 404 is arranged on the upper and lower sides outside the mounting groove 602. The function is as follows: the setting installation locating plate can be better fix the slider assembly, and the setting slider base can be better install the rocker arm assembly into the mounting groove, so that the formation of motion interference is avoided.

Specifically, the mounting and positioning plate 404 is provided with a plurality of screw holes 4041, and the screw holes 4041 of the mounting and positioning plate 404 are fixedly connected with the housing 6 through screws, so that the effect is that: the setting of screw hole can be convenient installation locating plate and shell are connected fixedly. The slide block base 403 of the slide block assembly 4 on the upper right side and the lower right side is provided with an adjusting screw hole 4031 for installing an adjusting screw, and the function is that: the installation adjusting screw can adjust the uneven atress that produces of rocking arm after the door body installation.

Specifically, the upper and lower ends of the first connecting arm 102 are respectively provided with a square gum cover 7 and are mounted in the sliding grooves 401 of the slider assemblies 4 on the upper left side and the lower left side, and the upper and lower ends of the fourth connecting arm 203 are respectively provided with a square gum cover 7 and are mounted in the sliding grooves 401 of the slider assemblies 4 on the upper right side and the lower right side. The function is as follows: the circular rubber sleeve in the existing hinge sliding groove is changed into the square rubber sleeve, so that the plane abrasion resistance can be improved.

Specifically, a side of the slider assembly 4 facing the rocker arm assembly is further provided with a fixing hole 405 for installing the balance support ejector rod 8, the balance support ejector rod 8 is connected between the fixing holes 405 of the slider assembly 4 on the upper left side and the lower left side, the balance support ejector rod 8 is connected between the fixing holes 405 of the slider assembly 4 on the upper right side and the lower right side, one balance support ejector rod 8 is arranged between the first connecting arm 102 and the third connecting arm 202, and the other balance support ejector rod 8 is arranged between the second connecting arm 105 and the fourth connecting arm 203. The function is as follows: the arrangement of the two balance support ejector rods ensures that the whole structure is stressed uniformly.

Specifically, the upper end and the lower end of the balance support ejector rod 8 are fixedly connected with the sliding block assembly 4 through inner hexagonal positioning columns 9 respectively. The function is as follows: the inner hexagonal positioning column can better fix the balance support ejector rod.

Specifically, referring to fig. 10, the included angle between the slider assemblies 4 on the left and right sides may vary in the range of 0 to 180 degrees. The installation process comprises the following steps: referring to fig. 11, the first step is: a side sliding block component marked with a 'Door' character and a shell are arranged in an opening of the Door leaf 11, and a cross screwdriver (hexagonal key) is used for containing a product into the Door leaf 11; and a second step of: the sliding block component and the shell on the other side are arranged in the opening of the door frame 12 and screwed by a cross screwdriver (hexagonal key); and a third step of: after the installation and debugging are finished, the hinge installation is guaranteed to be firm and reliable, and the hinge surface is flush with the side face of the door frame and the door leaf. Working principle: the door body hinge disclosed by the utility model rotates by taking the middle rotating shaft as the center in the opening and closing movement process of the door body, and a rubber sleeve is arranged between the first rocker arm and the second rocker arm in the specific implementation process so as to achieve the effects of silencing and balancing stress, and when the door body is opened and closed, the first connecting arm and the fourth connecting arm of the rocker arm are driven to slide along the sliding groove, and the sliding block assembly rotates around the third connecting arm and the second connecting arm, so that the door body hinge disclosed by the utility model can be opened and closed within the range of 0-180 degrees. The sliding block assembly is assembled between the door frame and the door leaf, corresponding screws (wood tooth screws or machine tapping screws) can be selected according to the material of the door, and the screws penetrate through screw holes in an installation positioning plate of the sliding block assembly on one side to be installed and fixed on the door frame; the screw passes through the screw hole on the installation locating plate of the sliding block component at the other side and is installed and fixed on the door leaf.

Specifically, the middle parts of the first connecting arm 102, the third connecting arm 202 and the fourth connecting arm 203 are respectively provided with an integrally formed pin 10, the pin 10 is cylindrical, the upper end and the lower end of the pin protrude from the first connecting arm 102, the third connecting arm 202 and the fourth connecting arm 203, and the second connecting arm 105 is cylindrical. The function is as follows: the first connecting arm 102, the third connecting arm 202 and the fourth connecting arm 203 are integrally formed with the pin 10, so that the number of parts is directly reduced, the pin assembling time is reduced, and the strength of the pin is enhanced.

Specifically, the rocker arm assembly and the slider assembly 3 are made of carbon steel. The function is as follows: the mechanical properties of carbon steel are superior to those of other materials, and the materials of the rocker arm assembly and the sliding block assembly are made of carbon steel, so that the strength and the rigidity of the whole structure can be improved, and the problem that the door body is dropped due to insufficient strength of the rocker arm is solved. Wherein, the tensile strength of the carbon steel is 550-600MPa, the yield strength is 280-355MPa, the hot rolling hardness is 180-229HBS, the annealing hardness is 145-197HBS, and the carbon steel has higher quality because of less harmful impurities such as sulfur, phosphorus and the like, and has better strength, plasticity and toughness than the common carbon structural steel and better comprehensive mechanical property.

In summary, the utility model has the following technical effects:

a) The rocker arm and the pin are integrally formed, so that parts are saved, the assembly is simple and convenient, and mass production is easy to realize;

b) The rocker arm is I-shaped, an I-beam structure is applied, and the rocker arm is not easy to break;

c) Carbon steel is used as a structural raw material, so that the strength of the whole structure can be improved, the abrasion is not easy, and the condition that the door body is easy to fall down after the door leaf is installed can be avoided to a certain extent;

d) The structural design of the door hinge can replace hinge products using bearings in the prior art, and the cost of the products is greatly reduced;

e) The door leaf of the door hinge can bear 200Kg;

f) The door body opening and closing movement of the door body hinge can reach 180 degrees.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.

Claims (10)

1. The utility model provides a novel door body hinge structure, includes rocking arm subassembly, its characterized in that: the rocker arm assembly comprises a first rocker arm (1) and a second rocker arm (2), wherein the first rocker arm (1) comprises two arc-shaped cantilevers (101) which are vertically and symmetrically distributed, the left sides of the two arc-shaped cantilevers (101) are connected through a first connecting arm (102), a first positioning hole (103) and a second positioning hole (104) which penetrate through the middle part and the right side of the arc-shaped cantilevers (101) in sequence are formed in the middle part and the right side of the arc-shaped cantilevers, and the second positioning holes (104) of the two arc-shaped cantilevers (101) are connected through a second connecting arm (105); the second rocker arm (2) comprises an arc-shaped rotating arm (201), a third connecting arm (202) and a fourth connecting arm (203) which extend vertically are respectively arranged on the left side and the right side of the arc-shaped rotating arm (201), and a third positioning hole (204) penetrating through the middle of the arc-shaped rotating arm (201) vertically is formed; the arc cantilever (101) and the arc rotating arm (201) are arranged in the first rocker arm (1) in a forward direction, the third connecting arm (202) and the fourth connecting arm (203) are respectively arranged on the front side and the rear side of the first rocker arm (1), and the first positioning hole (103) and the third positioning hole (204) are coaxially arranged and are connected in a rotating way through the middle rotating shaft (3); the upper left side, the lower left side, the upper right side and the lower right side of the rocker arm assembly are respectively provided with a slider assembly (4), one side of the slider assembly (4) on the upper left side and the lower left side facing the rocker arm assembly is provided with a sliding groove (401) for sliding a first connecting arm (102), one side of the slider assembly (4) on the upper right side and the lower right side facing the rocker arm assembly is provided with a sliding groove (401) for sliding a fourth connecting arm (203), one side of the slider assembly (4) on the upper left side and the lower left side facing the rocker arm assembly is also provided with a rotating hole (402) for rotating a third connecting arm (202), and one side of the slider assembly (4) on the upper right side and the lower right side facing the rocker arm assembly is also provided with a rotating hole (402) for rotating a second connecting arm (105); the upper and lower both ends of third linking arm (202) are equipped with circular gum cover (5) respectively and install in rotation hole (402) of slider subassembly (4) of upper left side, lower left side, the upper and lower both ends of second linking arm (105) are equipped with circular gum cover (5) respectively and install in rotation hole (402) of slider subassembly (4) of upper right side, lower right side.

2. The novel door hinge structure according to claim 1, wherein: the left and right sides of rocking arm subassembly is equipped with shell (6) respectively, shell (6) are equipped with opening (601) towards one side of rocking arm subassembly, and upper left side, left downside slider subassembly (4) pass opening (601) and locate in shell (6) on left side, and upper right side, right downside slider subassembly (4) pass opening (601) and locate in shell (6) on right side.

3. The novel door hinge structure according to claim 2, wherein: the middle part of shell (6) is equipped with mounting groove (602), slider subassembly (4) are including slider base (403) and installation locating plate (404), one side that slider base (403) kept away from the rocking arm subassembly is located perpendicularly to installation locating plate (404), slider base (403) are located in mounting groove (602), installation locating plate (404) are installed in the upper and lower outside of mounting groove (602).

4. A novel door hinge structure according to claim 3, wherein: the mounting locating plate (404) is provided with a plurality of screw holes (4041), and the screw holes (4041) of the mounting locating plate (404) are fixedly connected with the shell (6) through screws; the slide block bases (403) of the slide block assemblies (4) on the upper right side and the lower right side are provided with adjusting screw holes (4031) for installing adjusting screws.

5. A novel door hinge structure according to any one of claims 1 to 4, wherein: the upper and lower both ends of first linking arm (102) are equipped with square gum cover (7) respectively and install in spout (401) of slider subassembly (4) of upper left side, lower left side, the upper and lower both ends of fourth linking arm (203) are equipped with square gum cover (7) respectively and install in spout (401) of slider subassembly (4) of upper right side, lower right side.

6. A novel door hinge structure according to any one of claims 1 to 4, wherein: the sliding block assembly (4) is further provided with a fixing hole (405) for installing a balance supporting ejector rod (8) towards one side of the rocker arm assembly, the balance supporting ejector rod (8) is connected between the fixing holes (405) of the sliding block assembly (4) on the upper left side and the lower left side, the balance supporting ejector rod (8) is connected between the fixing holes (405) of the sliding block assembly (4) on the upper right side and the lower right side, one balance supporting ejector rod (8) is arranged between the first connecting arm (102) and the third connecting arm (202), and the other balance supporting ejector rod (8) is arranged between the second connecting arm (105) and the fourth connecting arm (203).

7. The novel door hinge structure according to claim 6, wherein: the upper end and the lower end of the balance support ejector rod (8) are fixedly connected with the sliding block component (4) through inner hexagonal positioning columns (9) respectively.

8. A novel door hinge structure according to any one of claims 1 to 4 and 7, wherein: the included angle between the sliding block components (4) at the left side and the right side can be changed within the range of 0-180 degrees.

9. A novel door hinge structure according to any one of claims 1 to 4 and 7, wherein: the middle parts of the first connecting arm (102), the third connecting arm (202) and the fourth connecting arm (203) are respectively provided with an integrally formed pin (10), the pins (10) are cylindrical, the upper end and the lower end of the pins are protruded out of the first connecting arm (102), the third connecting arm (202) and the fourth connecting arm (203), and the second connecting arm (105) is cylindrical.

10. A novel door hinge structure according to any one of claims 1 to 4 and 7, wherein: the rocker arm component and the sliding block component (4) are made of carbon steel.