Concealed hinge

Abstract

[Problem] Conventional hydraulic concealed hinges have difficulty adjusting the closing speed after installation, making them inflexible for on-site installation, and posing problems in terms of workability and practicality. [Solution] The present invention relates to a hidden hinge comprising a functional shaft, a housing that houses the functional shaft, and a speed adjusting screw that adjusts the flow rate of hydraulic oil within the functional shaft. A vertical passage perpendicular to the axial direction of the functional shaft is formed at one end of the housing, and a horizontal passage aligned with the axial direction of the functional shaft is formed in the side wall at the same end, with the two passages intersecting and passing through. The drive part of the speed adjusting screw is located outside the functional shaft and extends into the horizontal passage. The drive part is inserted into the vertical passage, and the drive part is formed with an engagement part that meshes with a first tooth of the speed adjusting screw.

Description

[Technical Field]

[0001] The present invention relates to hinges, and more particularly to concealed hinges. [Background technology]

[0002] Currently, concealed hinges are widely used in door installation, and concealed hinges with automatic closing functions and hydraulically controlled closing speeds are also becoming more common. However, these hydraulically controlled hinges make it very inconvenient to adjust the closing speed. For example, as described in Chinese Patent Applications Nos. 201922463281.5 and 201922463124.4, the speed must be adjusted before the hinge is installed, and once the hinge housing is fitted into the door or door frame after installation, the speed cannot be adjusted. Therefore, to adjust the closing speed, the housing must be removed and adjusted again, which requires repeated door installation and causes great inconvenience during the adjustment process. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Patent Application No. 201922463281.5 [Patent Document 1] Chinese Patent Application No. 201922463124.4 Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a concealed hinge whose closing speed can be easily adjusted after installation. [Means for solving the problem]

[0005] To solve the above problems, the present invention provides the following technical solution. Specifically, the present invention relates to a hidden hinge including a functional shaft, a housing for accommodating the functional shaft, and a speed-regulating screw for adjusting the flow rate of hydraulic fluid within the functional shaft. A plate portion at one end of the housing is provided with a vertical passage perpendicular to the axial direction of the functional shaft, and a side wall at the same end of the housing is provided with a horizontal passage aligned with the axial direction of the functional shaft, with the horizontal and vertical passages intersecting and communicating. One end of the speed-regulating screw is a needle shaft portion with a variable diameter, and the other end is a columnar portion serving as a drive part with first teeth. The middle portion of the speed-regulating screw is provided with a threaded portion that engages with a first thread provided on the inner wall of the lower cover of the functional shaft. The needle shaft portion is inserted into an adjustment valve hole provided in a piston within the functional shaft, and the drive part is located outside the functional shaft and inserted into the horizontal passage of the housing. The drive part is inserted into the vertical passage and has an engaging portion that engages with the first teeth.

[0006] Furthermore, the needle shaft portion, the intermediate portion and the drive portion of the speed adjusting screw are separate structures.

[0007] Furthermore, the drive section is cylindrical as a whole, and is composed of an upper end section having a recess and a middle section having an engaging section, and the engaging section is threaded.

[0008] Furthermore, the lower part of the drive unit is a lower shaft having a smaller diameter than the intermediate shaft, and a step surface is formed between the intermediate shaft and the lower shaft. The lower shaft passes through a vertical passage and protrudes from the bottom surface of the housing, and a packing is attached to the protruding part.

[0009] Additionally, a lateral passage extends through the side wall at the same end of the housing.

[0010] Furthermore, the entire drive unit is flat and rod-shaped, and is composed of a shaft having a handle and an engaging portion, and the engaging portion is tooth-shaped.

[0011] Furthermore, the vertical passage passes through a plate member at one end of the housing, and the horizontal passage also passes through a plate member at the same end of the housing. [Effects of the Invention]

[0012] By using the technical means of the present invention, a speed-regulating structure is provided in the hinge housing, and the closing speed can be adjusted with a tool from the end face direction after the hinge is installed. This solves the problem of difficulty in adjusting the speed after installation with conventional hydraulic concealed hinges, improves the convenience of installation and adjustment, and enables savings in manpower, cost, and time, meeting the needs of modern society. [Brief explanation of the drawings]

[0013] [Figure 1] is a schematic diagram of the functional axis described in Chinese Patent No. 201922463281.5. [Figure 2] 1 is a side cross-sectional view of a hidden hinge according to a first embodiment of the present invention. [Figure 3] 1 is a front cross-sectional view of a hidden hinge according to a first embodiment of the present invention. [Figure 4] 1 is a structural diagram of a speed regulating screw according to the present invention. [Figure 5] 1 is a structural diagram of a drive unit according to a first embodiment of the present invention. [Figure 6] 4 is a cross-sectional view showing the cooperative state of the drive unit and the speed regulating screw in the first embodiment of the present invention. FIG. [Figure 7] 1 is a structural diagram showing a separation structure of a speed control screw according to the present invention. [Figure 8] 10 is a structural diagram of a drive unit according to a second embodiment of the present invention. [Figure 9] 10 is a cross-sectional view showing a first cooperative state of a drive unit and a speed regulating screw in a second embodiment of the present invention. FIG. [Figure 10] 10 is a cross-sectional view showing a second cooperative state of the drive unit and the speed regulating screw in the second embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 10, with the aim of making the advantages and features of the present invention easier to understand for those skilled in the art and clearly defining the scope of protection thereof.

[0015] First example: Referring to FIGS. 1 to 7, a first embodiment of the present invention is as follows. The device comprises a functional shaft (1), a housing (2) that houses the functional shaft (1), and a speed-regulating screw (3) that adjusts the flow rate of hydraulic oil within the functional shaft (1). A vertical passage (201) perpendicular to the axial direction of the functional shaft (1) is provided in a plate portion at one end of the housing (2), and a horizontal passage (202) coinciding with the axial direction of the functional shaft (1) is provided in a side wall at the same end. The horizontal passage (202) and the vertical passage (201) intersect and communicate with each other. One end of the speed-regulating screw (3) is a variable-diameter needle shaft portion (301), and the other end is a columnar drive portion equipped with a first tooth (302). A thread portion (303) is provided in the middle of the speed-regulating screw to engage with a first thread (101) provided on the inner wall of the lower cover of the functional shaft (1). The needle shaft 301 is inserted into the valve hole 102 provided in the piston inside the shaft 1, and the drive unit is located outside the shaft 1 and inserted into the horizontal passage 202 of the housing 2. The drive unit 4 is inserted into the vertical passage 201, and the drive unit 4 is provided with an engagement portion 401 that engages with the first tooth 302.

[0016] Furthermore, the needle shaft portion (301), the intermediate portion, and the drive portion of the speed adjusting screw (3) are separate.

[0017] Furthermore, the driving part (4) is cylindrical as a whole, and includes an upper end part with a recess (402) and a middle columnar body part with an engagement part (401), and the engagement part (401) is screw-shaped.

[0018] Furthermore, the lower part of the driving part (4) is a lower pillar body whose diameter is smaller than that of the intermediate pillar body, and a step surface (403) is formed between the intermediate pillar body and the lower pillar body. The lower pillar body passes through the vertical passage (201) and protrudes from the lower bottom surface of the housing (2), and a packing (404) is attached to the protruding part.

[0019] By utilizing the stepped surface and the end surface of the packing, the axial movement of the drive unit in the up and down direction is restricted, but left and right rotation is possible.

[0020] Furthermore, the lateral passage (202) penetrates the side wall on the one end side of the housing (2).

[0021] Compared with the prior art shown in FIG. 1, in the present invention, the speed control screw is extended in the axial direction based on the prior art.

[0022] In this embodiment, after installing the hinge, the user uses a suitable tool to rotate the recess of the drive unit, causing the screw portion of the drive unit to engage with the first tooth of the speed-regulating screw and rotate in unison. Note: The connection between the drive unit and the speed-regulating screw is essentially a worm gear and worm wheel transmission. Rotation of the speed-regulating screw is equivalent to rotation within the threaded hole in the shaft, i.e., the first threaded hole in the inner wall of the lower cover. The entire speed-regulating screw moves axially, changing the position at which the needle shaft is inserted into the speed-regulating valve hole in the shaft. This changes the gap between the needle shaft and the speed-regulating valve hole. The change in the diameter of the needle shaft, i.e., the size of its cross section at each position, changes the depth of insertion into the speed-regulating valve hole, changing the gap. This changes the flow rate of hydraulic oil from the pressurized oil chamber to the oil reservoir in the shaft, thereby adjusting the axial movement speed of the piston when the hinge closes, i.e., adjusting the hinge closing speed. This allows the closing speed to be adjusted using a tool from the end face after the hinge has been installed, solving the problem of not being able to adjust the closing speed after installation with commercially available hydraulically buffered concealed hinges, making installation and adjustment more convenient, saving labor, cost, and time, and meeting the needs of modern society.

[0023] Second Example: See Figures 4, 7, 8, 9 and 10. A second example is as follows.

[0024] The drive unit (4) is generally flat and rod-shaped, and is composed of a handle portion (405) and a column-shaped portion having an engaging portion (401). The engaging portion (401) is tooth-shaped.

[0025] Furthermore, the vertical passage (201) passes through the plate material at one end of the housing 1, and the horizontal passage (202) also passes through the plate material at the same end of the housing 1.

[0026] In this embodiment, the principle and effect are generally the same as in the first embodiment, but the advantages over the first embodiment include that the drive unit is easier to manufacture and does not require a separate tool to rotate the drive unit during use, making it more convenient.

[0027] The user inserts the drive shaft into the vertical passage (201) until the engaging portion (401) engages with the first tooth (302) of the speed control screw. As the shaft is inserted downward, the speed control screw is rotated, causing the speed control screw to move back and forth as a whole, changing its insertion position into the speed control valve hole and changing the flow rate of hydraulic oil, thereby adjusting the hinge closing speed. When the shaft is pushed all the way in and cannot be advanced any further, the user can rotate the shaft to separate the engaging portion (401) from the first tooth (302) of the speed control screw, as shown in Figure 10, and then pull the shaft out. To rotate the speed control screw in the opposite direction, the user inserts the shaft into the bottom of the housing with the engaging portion aligned with the axial direction of the hinge's functional axis, twists the drive shaft until the engaging portion re-engages with the first tooth of the speed control screw, and then pulls the drive shaft out, rotating the speed control screw in the opposite direction. By inserting or extracting the columnar part, the speed control screw can be rotated forward or backward, and the forward or backward movement of the speed control screw can be adjusted.

[0028] In the above embodiment, the needle shaft portion (301), intermediate portion, and drive portion of the speed regulating screw (3) are separate, which aims to facilitate manufacturing and improve durability and quality by using different materials for each portion.

[0029] The above are only some of the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent modifications or variations of the structure made by using the contents of the specification and accompanying drawings of the present invention, or direct or indirect application to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hidden hinge comprising a functional shaft (1), a housing (2) for accommodating the functional shaft (1), and a speed adjusting screw (3) for adjusting the flow rate of hydraulic oil in the functional shaft (1), A vertical passage (201) perpendicular to the axial direction of the functional shaft (1) is provided in a plate portion at one end of the housing (2), and a horizontal passage (202) parallel to the axial direction of the functional shaft (1) is provided in a side wall at the one end of the housing (2), and the horizontal passage (202) intersects and communicates with the vertical passage (201); A needle shaft portion (301) having a stepped diameter is formed at one end of the speed adjusting screw (3), and a columnar driving portion having a first tooth (302) is provided at the other end. A threaded portion (303) is provided in the middle portion of the speed adjusting screw (3) to engage with a first threaded portion (101) formed on the inner surface of the lower end cover of the functional shaft (1); The needle shaft portion (301) is inserted into a speed control valve hole (102) provided in a piston in the functional shaft (1), and the drive portion is located outside the functional shaft (1) and is arranged in a lateral passage (202) of the housing (2); A driving part (4) is inserted into the longitudinal passage (201), and the driving part (4) is provided with an engaging part (401) that engages with the first tooth (302). A hidden hinge is featured.

2. The concealed hinge according to claim 1, wherein the needle shaft portion (301), the intermediate portion, and the driving portion of the speed adjusting screw (3) are separate structures.

3. 2. The concealed hinge of claim 1, wherein the drive portion (4) is generally cylindrical and has an upper end portion having a recess (402) and an intermediate pillar portion having an engagement portion (401), the engagement portion (401) being threaded.

4. The lower end of the drive unit (4) is formed of a pillar having a smaller diameter than the intermediate pillar, and a step surface (403) is formed between the intermediate pillar and the lower end pillar; A hidden hinge as described in claim 3, characterized in that the lower end pillar passes through a vertical passage (201) and protrudes from the bottom surface of the housing (2), and a gasket (404) is attached to the protruding portion.

5. 5. The concealed hinge of claim 4, wherein the lateral passage (202) penetrates the side wall at the one end of the housing (2).

6. 2. The concealed hinge of claim 1, wherein the drive portion (4) is generally flat rod-shaped and comprises a pillar-shaped body having a handle portion (405) and an engagement portion (401), the engagement portion (401) being tooth-shaped.

7. The hidden hinge of claim 6, wherein the vertical passage (201) penetrates a plate portion at one end of the housing (2), and the horizontal passage (202) penetrates the plate portion at the one end of the housing (2).

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