Cabinet door hinge convenient to install

Abstract

A cabinet door hinge convenient to install comprises a hinge arm and a hinge cup, the hinge arm is hinged to the hinge cup through an upper connecting rod and a lower connecting rod, the hinge arm, the hinge cup, the upper connecting rod and the lower connecting rod form a four-connecting-rod structure, the tail portion of the lower connecting rod extends backwards to form a pressing arm, and the pressing arm is connected with a buffering cylinder installed in the hinge arm; a reset torsion spring and a buffering rubber mat are fixedly installed on the upper connecting rod through a pin shaft, one supporting leg of the reset torsion spring is connected with the hinge arm, the other supporting leg of the reset torsion spring is connected with the lower connecting rod, the lower end face of the buffering rubber mat covers the lower connecting rod, and when the hinge is closed to a set angle, the buffering rubber mat is clamped between the reset torsion spring and the lower connecting rod. The utility model has the beneficial effects that in the design, the design of the hinge ingeniously utilizes the interaction between the reset torsion spring and the buffer rubber mat; when the hinge is opened, the reset torsion spring body and the buffering rubber mat extrude each other, the extrusion effect generates stable force, and the hinge can be locked at a specific opening angle.

Description

Technical Field

[0001] The utility model relates to a hinge, in particular to a cabinet door hinge which is easy to install. Background Art

[0002] Flip-open doors are a common element in modern furniture design, especially in kitchen cabinets, bedroom wardrobes and office storage cabinets. The opening and closing functions of these doors mainly rely on hinges, which are mechanical devices that allow rotational or axial movement between two solid parts. The design of traditional hinges is usually simple, mainly consisting of two main parts: the hinge arm and the hinge cup, through which the cabinet door can be opened and closed around a fixed axis.

[0003] However, this traditional hinge design has some significant shortcomings in daily use. The main problem is that they lack an effective buffering mechanism when opening or closing the cabinet door. When the user quickly closes the cabinet door, the traditional hinge cannot slow down the speed of the door panel, causing the cabinet door to hit the cabinet directly with a large impact force. This not only produces a lot of noise, but may also cause damage to the cabinet door edge and hinge joints. Over time, these damages may accumulate, causing the joints to loosen or fail, thereby reducing the overall durability and safety of the furniture.

[0004] To solve this problem, technological development has introduced hinge designs with buffering functions. This type of hinge provides buffering force by integrating a hydraulic cylinder or similar buffering device to absorb the impact energy when the cabinet door is closed. This design, called a "one-stage force connection structure", significantly improves the closing action of the cabinet door, making it smoother and quieter. The liquid or other buffering medium in the hydraulic cylinder acts as a buffer when the cabinet door is closed, reducing the impact force on the hinge and cabinet connection point, effectively extending the service life of the furniture and improving the user experience.

[0005] Nevertheless, a force-connected structure also has its own limitations. One notable problem is that when the cabinet door is fully opened or closed to the maximum angle, the buffer force of the hydraulic cylinder may cause the cabinet door to swing back slightly. This swing back phenomenon is caused by the sudden release of the buffer force when the cabinet door reaches the maximum opening angle, causing the cabinet door to move in the opposite direction and produce a reciprocating swing. In the long run, this repeated small impact may cause damage to the structural integrity of the hinge, especially at the connection point between the hinge and the cabinet body, thereby affecting the stability and durability of the cabinet door.

[0006] In addition, during installation, the swing-back phenomenon will also cause the hinges and the cabinet to be unable to be accurately positioned during installation. Especially when multiple hinges are installed on the same cabinet door, multiple hinges cannot be connected to the cabinet at a uniform angle, resulting in the need for multiple workers to cooperate in the installation. Therefore, it is necessary to make further improvements. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a cabinet door hinge that is easy to install and has a simple structure and is easy to use. It can effectively avoid the swing-back phenomenon after the hinge is opened and facilitates the positioning between the hinge and the cabinet body during installation.

[0008] The purpose of the utility model is achieved in the following way: a cabinet door hinge that is easy to install, which includes a hinge arm and a hinge cup, the hinge arm is hinged to the hinge cup through an upper connecting rod and a lower connecting rod, the hinge arm, the hinge cup, the upper connecting rod and the lower connecting rod form a four-link structure, the tail of the lower connecting rod is extended backward with a pressure arm, the pressure arm is connected to a buffer cylinder installed in the hinge arm, when the hinge is closed, the pressure arm and the buffer cylinder interact with each other to press the buffer cylinder to generate a door closing buffer force; it is characterized in that: a reset torsion spring and a buffer rubber pad are fixedly installed on the upper connecting rod through a pin shaft, one supporting foot of the reset torsion spring is connected to the hinge arm, and the other supporting foot is connected to the lower connecting rod, the lower end surface of the buffer rubber pad covers the lower connecting rod, and when the hinge is closed to a set angle, the buffer rubber pad is clamped between the reset torsion spring and the lower connecting rod.

[0009] The hinge arm and hinge cup are hinged to the upper connecting rod and the lower connecting rod through a pin shaft. The front end of the buffer rubber pad is provided with a positioning groove, which is buckled on the transverse pin on the lower connecting rod to connect the buffer rubber pad and the lower connecting rod as a whole.

[0010] One of the supporting legs of the return torsion spring is pressed on the transverse pin, pushing the lower connecting rod to always swing in the hinge closing direction.

[0011] The lower end surface of the buffer rubber pad is inwardly concave and provided with a deformation zone, and the deformation zone covers the lower connecting rod.

[0012] The cross sections of the buffer rubber pad and the lower connecting rod are in a "7" shape. After the buffer rubber pad and the lower connecting rod are stacked, they are elastically pressed and restricted between the cross pin and the lower connecting rod.

[0013] The upper end surface of the buffer rubber pad is inwardly concave and provided with a deformation groove, and the deformation groove is vertically distributed on the buffer rubber pad.

[0014] The reset torsion spring is a double torsion spring.

[0015] The beneficial effects of the utility model are: 1) simple structure, low production cost and improved market competitiveness. 2) In this design, the design of the hinge cleverly utilizes the interaction between the reset torsion spring and the buffer rubber pad. When the hinge is opened, the reset torsion spring body and the buffer rubber pad squeeze each other. This squeezing action produces a stabilizing force that helps to lock the hinge at a specific opening angle. This locking mechanism effectively avoids the swing-back phenomenon that may occur when the hinge is opened to the maximum angle, thereby improving the stability and safety of the cabinet door. 3) By introducing the reset torsion spring and buffer rubber pad into the hinge design, not only the swing-back problem is solved, but also the structural stability of the hinge itself is enhanced. The presence of the buffer rubber pad reduces wear caused by impact or vibration, while the use of the reset torsion spring ensures that the hinge maintains appropriate tension during long-term use, further ensuring the durability and reliability of the cabinet door hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1-3 It is a schematic diagram of the hinge opening process in the utility model.

[0017] Figure 4-6 This is a structural cross-sectional view of the hinge opening process in the utility model.

[0018] Figure 7 This is the structural assembly drawing of the utility model.

[0019] Figure 8 , 9 10 is a diagram of a torsion spring and a buffer hinge rubber pad in the utility model.

[0020] Fig.11 This is a schematic diagram of the structure of the buffer rubber pad in the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings. A cabinet door hinge that is easy to install, comprising a hinge arm 1 and a hinge cup 2, the hinge arm 1 is hinged to the hinge cup 2 through an upper connecting rod 3 and a lower connecting rod 4, the hinge arm 1, the hinge cup 2, the upper connecting rod 3, and the lower connecting rod 4 form a four-link structure, the tail of the lower connecting rod 4 extends backward with a pressing arm 41, the pressing arm 41 is connected to a buffer cylinder 5 installed in the hinge arm 1, when the hinge is closed, the pressing arm 41 interacts with the buffer cylinder 5 to press the buffer cylinder 5 to generate a door closing buffer force; it is characterized in that: a reset torsion spring 7 and a buffer rubber pad 8 are fixedly installed on the upper connecting rod 3 through a pin shaft 6, one supporting foot of the reset torsion spring 7 is connected to the hinge arm 1, and the other supporting foot is connected to the lower connecting rod 4, the lower end surface of the buffer rubber pad 8 covers the lower connecting rod 4, and when the hinge is closed to a set angle, the buffer rubber pad 8 is clamped between the reset torsion spring 7 and the lower connecting rod 4.

[0022] The hinge arm 1 and hinge cup 2 are hinged to the upper connecting rod 3 and the lower connecting rod 4 through a pin shaft 6. A positioning groove 81 is provided at the front end of the buffer rubber pad 8. The positioning groove 81 is snapped onto the cross pin 42 on the lower connecting rod 4 to connect the buffer rubber pad 8 and the lower connecting rod 4 as a whole.

[0023] One of the supporting legs of the return torsion spring 7 presses on the transverse pin 42, pushing the lower connecting rod 4 to always swing in the hinge closing direction.

[0024] The lower end surface of the buffer rubber pad 8 is inwardly recessed to form a deformation zone 82 , and the deformation zone 82 covers the lower connecting rod 4 .

[0025] The cross-sections of the buffer rubber pad 8 and the lower connecting rod 4 are in a "7" shape. After the buffer rubber pad 8 and the lower connecting rod 4 are stacked, they are elastically pressed and restricted between the cross pin 42 and the lower connecting rod 4.

[0026] The upper end surface of the buffer rubber pad 8 is inwardly recessed to form a deformation groove 83 , and the deformation groove 83 is vertically distributed on the buffer rubber pad 8 .

[0027] The return torsion spring 7 is a double torsion spring.

[0028] Working principle: The cabinet door hinge of the present invention is an innovative design, which aims to solve the swing-back problem that may occur when the traditional hinge is fully opened, and to fix the opening angle so as to facilitate the precise installation of the hinge and the cabinet. The working principle of the hinge is based on a four-bar linkage, combined with the special application of a reset torsion spring and a buffer rubber pad, to achieve its unique function.

[0029] The basic structure of this hinge consists of a hinge arm, a hinge cup, an upper connecting rod and a lower connecting rod, forming a four-bar linkage. This mechanism design enables the hinge to maintain a stable motion trajectory during opening and closing, ensuring smooth movement of the cabinet door.

[0030] On the upper link, a return torsion spring and a buffer rubber pad are fixedly installed by a pin. One end of the return torsion spring is connected to the hinge arm, and the other end is connected to the lower link, while the buffer rubber pad covers the lower end surface of the lower link. This configuration plays a key role in the movement of the hinge. When the hinge is fully opened, the return torsion spring pushes the upper link and the lower link to a specific position through its elastic force, at which position the buffer rubber pad is squeezed and clamped between the main body of the return torsion spring and the lower link. This squeezing action generates sufficient elastic attraction, effectively locking the opening angle of the hinge and preventing the occurrence of swing-back phenomenon after the hinge is fully opened.

[0031] Furthermore: Since the angle of the hinge in this case can be maintained stably after opening, during installation, since the hinge can lock its opening angle in the fully open state, this provides great convenience for the installation of the hinge and the cabinet. The installer can preset the hinge to the maximum opening angle to ensure that the relative position of the hinge and the cabinet remains accurate during the installation process, which makes it easier for the user to fix it with fixing screws. Therefore, when the hinge is applied to a large door panel and multiple hinges are installed at the same time, a unified specific opening angle can enable multiple hinges to be installed at the same angle with the cabinet door or cabinet, so that the angle of the cabinet door is more accurate, thereby simplifying the installation steps and improving the installation efficiency and accuracy.

[0032] Through the above working principle, the hinge of the present invention not only solves the problems existing in the traditional hinge design, but also provides additional convenience and stability for the installation and use of the hinge. The implementation of this design significantly improves the overall performance of the cabinet door hinge and brings a more reliable and convenient use experience to users.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims created by the present invention.

Claims

1. A cabinet door hinge that is easy to install, comprising a hinge arm (1) and a hinge cup (2), wherein the hinge arm (1) is hinged to the hinge cup (2) via an upper connecting rod (3) and a lower connecting rod (4), wherein the hinge arm (1), the hinge cup (2), the upper connecting rod (3) and the lower connecting rod (4) form a four-link structure, wherein a pressure arm (41) extends backward from the tail of the lower connecting rod (4), and the pressure arm (41) is connected to a buffer cylinder (5) installed in the hinge arm (1), and when the hinge is closed, the pressure arm (41) interacts with the buffer cylinder (5) to press the buffer cylinder (5) to generate a door closing buffer force; characterized in that: A return torsion spring (7) and a buffer rubber pad (8) are fixedly mounted on the upper connecting rod (3) via a pin shaft (6); one supporting leg of the return torsion spring (7) is connected to the hinge arm (1), and the other supporting leg is connected to the lower connecting rod (4); the lower end surface of the buffer rubber pad (8) covers the lower connecting rod (4); when the hinge is closed to a set angle, the buffer rubber pad (8) is clamped between the return torsion spring (7) and the lower connecting rod (4).

2. The cabinet door hinge that is easy to install according to claim 1, characterized in that: The hinge arm (1) and the hinge cup (2) are hingedly connected to the upper connecting rod (3) and the lower connecting rod (4) via a pin shaft (6); a positioning groove (81) is provided at the front end of the buffer rubber pad (8); the positioning groove (81) is snapped onto a transverse pin (42) on the lower connecting rod (4), thereby connecting the buffer rubber pad (8) and the lower connecting rod (4) as a whole.

3. The cabinet door hinge that is easy to install according to claim 2, characterized in that: One of the supporting legs of the return torsion spring (7) is pressed on the transverse pin (42), pushing the lower connecting rod (4) to always swing in the hinge closing direction.

4. The cabinet door hinge that is easy to install according to claim 1, characterized in that: The lower end surface of the buffer rubber pad (8) is inwardly recessed and provided with a deformation zone (82), and the deformation zone (82) covers the lower connecting rod (4).

5. The cabinet door hinge that is easy to install according to claim 2, characterized in that: The cross-sections of the buffer rubber pad (8) and the lower connecting rod (4) are in the shape of a letter "7". After being stacked, the buffer rubber pad (8) and the lower connecting rod (4) are elastically pressed and restrained between the cross pin (42) and the lower connecting rod (4).

6. The cabinet door hinge that is easy to install according to claim 1, characterized in that: The upper end surface of the buffer rubber pad (8) is inwardly recessed and provided with a deformation groove (83), and the deformation groove (83) is vertically distributed on the buffer rubber pad (8).

7. The cabinet door hinge that is easy to install according to claim 1, characterized in that: The return torsion spring (7) is a double torsion spring.

Images