Hinge

Abstract

The utility model discloses a hinge which comprises a first hinge plate, a second hinge plate and a hinge shaft, the first hinge plate and the second hinge plate are provided with shaft holes, the hinge shaft is provided with a pressure spring groove, the hinge shaft penetrates into the shaft holes, the first hinge plate is provided with a groove, one end of the groove is communicated with the shaft holes, the other end of the groove is provided with a step, and an n-shaped pressure spring is arranged in the groove. One end of the pressure spring is limited on the step, the other end of the pressure spring is pressed on the hinge shaft and clamped with the pressure spring groove, the pressure spring is simple in structure, the pressure spring is convenient to produce due to the n-shaped structure, and meanwhile, the pressure spring is commonly used on the left and right sides of the hinge to facilitate overall assembly; the two ends of the pressure spring are provided with steps and a fixing structure pressed on the hinge shaft, so that the pressure spring is effectively limited and fixed and is prevented from falling off, an existing riveting process is omitted, and defective products are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a hinge which is convenient for production and has a high yield rate. Background Art

[0002] A hinge, also known as a hinge joint, is a mechanical device used to connect two solids and allow relative rotation between them. A hinge can be composed of movable components or foldable materials. When applied to a door, it plays a role in bearing weight and enabling the door to open and close smoothly.

[0003] A hinge includes a first hinge plate, a second hinge plate having a shaft hole, and a hinge shaft, also known as a static hinge, a moving hinge, and a pin. The hinge shaft passes through the shaft holes of the first hinge plate and the second hinge plate, and the two form a rotational connection through the hinge shaft.

[0004] In order to prevent the hinge shaft from disengaging from the shaft hole, in the prior art, a compression spring is usually used to limit the hinge shaft. As shown in Figure 1 and Figure 2 , by opening a groove perpendicular to the shaft hole on the first hinge plate 1', placing an L-shaped compression spring 3' in the groove 2', where the compression spring is located above the hinge shaft and cooperates with the spring groove, and forming a riveting point 4' by riveting the outer wall of the first hinge plate 1', the compression spring 3' is fixed in the groove 2'. For a hinge with such a structure, the installation and manufacturing processes are complex. Due to reasons such as the compression spring not being placed in place and the compression spring shifting during the riveting process, there is a certain proportion of defective products after press riveting, which affects production efficiency and cost.

[0005] Since generally two hinge shafts, left and right, are used to connect the static hinge and the moving hinge in a hinge, in the prior art, there is another type of hinge that uses symmetrical left and right special-shaped compression springs to fix the hinge shaft; in this type of hinge, the compression spring structure is relatively complex, and at the same time, a relatively large notch needs to be opened, and the compression springs are different for left and right and cannot be used interchangeably, having the disadvantage of inconvenient assembly and forming. Content of the Utility Model

[0006] The purpose of the utility model is to provide a hinge that can be easily manufactured and assembled and prevent the generation of defective products.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: A hinge includes a first hinge plate and a second hinge plate having a shaft hole, and a hinge shaft provided with a spring groove. The hinge shaft passes through the shaft hole, and the first hinge plate and the second hinge plate are rotationally connected through the hinge shaft. One end of the groove communicated with the shaft hole is provided on the first hinge plate, a step is provided at the other end of the groove, a U-shaped compression spring is arranged in the groove, one end of the compression spring is limited on the step, and the other end is pressed against the hinge shaft and clamped with the spring groove.

[0008] Preferably, a weight-reducing groove is provided on the first hinge plate, and an inner hole is dug in the groove and communicated with the weight-reducing groove. A step is formed between the bottom of the weight-reducing groove and the inner hole, and one end of the compression spring is hooked on the step.

[0009] Preferably, the length of the compression spring hooked on the step is greater than the clearance between the other end of the compression spring and the minimum diameter of the hinge shaft.

[0010] Preferably, the compression spring is integrally formed with a horizontal section, a bending section and a connecting section distributed in a U-shape. The horizontal section is located at the bottom of the groove, and the connecting sections are located at both ends and are respectively connected to the step and the hinge shaft.

[0011] Advantages of the present utility model:

[0012] 1. The structure of the compression spring is relatively simple, and the U-shape is convenient for the production of the compression spring. At the same time, it is applicable to both sides of the hinge, which is convenient for overall assembly;

[0013] 2. The two ends of the compression spring adopt a fixed structure of a step and being pressed against the hinge shaft, which not only effectively limits and fixes the compression spring to prevent it from falling off, but also omits the existing riveting process and avoids the generation of defective products. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of the prior art;

[0015] Figure 2 is a schematic cross-sectional diagram of the prior art;

[0016] Figure 3 is a schematic structural diagram of the present utility model;

[0017] Figure 4 is an exploded view of the present utility model;

[0018] Figure 5 is a schematic axial cross-sectional diagram of the present utility model;

[0019] Figure 6 is a schematic cross-sectional diagram of the groove in the present utility model;

[0020] Figure 7 is Figure 6 an enlarged schematic view of the cross-section in;

[0021] Figure 8 is a schematic structural diagram of the compression spring in the present utility model;

[0022] Reference numerals: 1. First hinge plate; 2. Second hinge plate; 3. Compression spring groove; 4. Hinge shaft; 5. Groove; 6. Step; 7. Compression spring; 8. Weight-reducing groove; 9. Inner hole; 71. Horizontal section; 72. Bending section; 73. Connecting section. Detailed implementation manners

[0023] The following is only the preferred embodiment of the present utility model, and the protection scope is not limited to this embodiment. All technical solutions falling within the idea of the present utility model shall belong to the protection scope of the present utility model. At the same time, it should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

[0024] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0025] The orientation terms mentioned in this embodiment, such as "up, down, left, right", etc., are only used to assist those skilled in the art in this technical field to understand the connection between each feature or part, etc. in combination with each drawing.

[0026] As Figures 3 to 8 shown, the present utility model includes a first hinge plate 1 with a shaft hole, a second hinge plate 2, and a hinge shaft 4 provided with a compression spring groove 3. The first hinge plate 1 has a protruding mounting portion, and the shaft hole is opened in the mounting portion. The number of the mounting portions is two, and the mounting position of the second hinge plate 2 is between them; the shaft holes of the second hinge plate 2 and the first hinge plate 1 are located on the same axis.

[0027] The number of the hinge shafts 4 is two, corresponding to the left and right sides of the first hinge plate 1 respectively. The hinge shafts 4 pass through the shaft holes of the second hinge plate 2 and the first hinge plate 1, and the first hinge plate 1 and the second hinge plate 2 are rotationally connected through the hinge shafts 4.

[0028] The first hinge plate 1 is provided with grooves 5. The distribution direction of the grooves 5 is perpendicular to the shaft hole. The number of the grooves 5 is two, corresponding to the two hinge shafts 4 respectively. One end of the groove 5 is communicated with the shaft hole, and the groove 5 expands to the entire mounting portion at this end, and is horizontally separated from the shaft hole to realize communication with the shaft hole, so that the compression spring 7 can enter the shaft hole from the groove 5; a step 6 is provided at the other end of the groove 5, and a U-shaped compression spring 7 is arranged in the groove 5. One end of the compression spring 7 is limited on the step 6, and the other end is pressed against the hinge shaft 4 and is clamped with the compression spring groove 3. Due to the cooperation of the compression spring 7 and the compression spring groove 3, axial limitation of the hinge shaft 4 is achieved to prevent it from being pulled out of the shaft hole.

[0029] In order to reduce the material cost, the first hinge plate 1 is provided with a weight-reducing groove 8, and the weight-reducing groove 8 is opened on the back of the first hinge plate 1, and the groove 5 is located on the front.

[0030] To facilitate the manufacturing and shaping of the step 6, an inner hole 9 communicating with the weight-reducing groove 8 is dug in the groove 5. The step 6 is formed between the bottom of the weight-reducing groove 8 and the inner hole 9. One end of the compression spring 7 is hooked on the step 6.

[0031] To ensure that the compression spring 7 will not fall out of the groove after assembly, the length L1 of the compression spring 7 hooked on the step 6 is greater than the clearance L2 between the other end of the compression spring 7 and the minimum diameter of the hinge shaft 4.

[0032] Specifically, the compression spring 7 is integrally formed with a horizontal section 71, a bending section 72 and a connecting section 73 distributed in a U-shape. The horizontal section 71 is in the middle, and two groups are arranged on both sides to ensure that the compression spring 2 will not fall out of the groove after assembly. The horizontal section 71 is located at the bottom of the groove 5, and the connecting sections 73 are located at both ends and are respectively connected to the step 6 and the hinge shaft 4.

[0033] During installation, the second hinge plate 2 is placed into the installation position of the first hinge plate 1. Then, the compression spring 7 is placed into the groove 5. The front end of the compression spring 7, that is, one of the connecting sections 73, is stuck on the step 6. Then, the hinge shaft 4 is inserted into the shaft hole. The hinge shaft 4 presses down the tail end of the compression spring 7. At this time, the horizontal section 71 of the compression spring 7 supports on the bottom of the groove 5, the front end of the compression spring 7 is hooked on the surface of the step 6, and the tail end of the compression spring 7, that is, the other connecting section 73, presses on the hinge shaft 4. Using the self-elastic force of the compression spring 7, it is tightened in the groove 5. As the hinge shaft 4 is further inserted until it is in place on the compression spring groove 3, the tail end of the compression spring 7 forms a snap connection with the compression spring groove 3.

[0034] The above embodiments are illustrative of the present invention, not limiting of the present invention. Any simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A hinge, comprising a first hinge plate (1) and a second hinge plate (2) each having an axis hole, and a hinge shaft (4) provided with a compression spring groove (3), wherein the hinge shaft (4) is inserted into the axis hole, and the first hinge plate (1) and the second hinge plate (2) are rotatably connected via the hinge shaft (4), characterized in that: The first hinge plate (1) is provided with a groove (5) whose one end is connected to the shaft hole, and a step (6) is provided at the other end of the groove (5). A cross-shaped compression spring (7) is provided in the groove (5), and one end of the compression spring (7) is limited on the step (6), and the other end is pressed by the hinge shaft (4) and is clamped with the compression spring groove (3).

2. A hinge according to claim 1, characterized in that: The first hinge plate (1) is provided with a weight-reducing groove (8), the groove (5) is provided with an inner hole (9) connected to the weight-reducing groove (8), a step (6) is formed between the bottom of the weight-reducing groove (8) and the inner hole (9), and one end of the compression spring (7) is hooked on the step (6).

3. A hinge according to claim 2, characterized in that: The length of the compression spring (7) hooked on the step (6) is greater than the gap between the other end of the compression spring (7) and the smallest diameter of the hinge shaft (4).

4. A hinge according to claim 1, characterized in that: The compression spring (7) is integrally formed with a horizontal section (71), a bent section (72) and a connecting section (73) distributed in a "X" shape, wherein the horizontal section (71) is located at the bottom of the groove (5), and the connecting section (73) is located at both ends and is respectively connected to the step (6) and the hinge shaft (4).

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