Hidden hinge structure

Abstract

The utility model discloses a hidden hinge structure which comprises a hinge cup, a hinge cup decorative cover and a pin shaft, the pin shaft is connected with the hinge cup and rotationally connected with the hinge cup decorative cover, the pin shaft is sleeved with a torsion spring, and the torsion spring is used for applying acting force to the hinge cup decorative cover and the hinge cup. And the hinge cup is kept in the hinge cup decorative cover so as to be kept in a covering state. The torsion spring is adopted to restrain the relative position of the hinge cup and the hinge cup decorative cover, and the hinge cup decorative cover covers the hinge cup under the action of the torsion spring without other external force, so that the hinge cup is shielded, and the situation that the appearance is affected due to the fact that the hinge cup is exposed is avoided. The hinge cup decorative cover does not need to adopt a sliding connection structure and operates independently, so that the problem that opening and closing of a cabinet door are affected due to mutual interference of parts is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a hidden hinge structure. Background Art

[0002] Prior art, such as the Chinese utility model patent document with publication number CN216553459U, discloses a hidden hinge, comprising a hinge cup and a hinge cover hingedly connected by a connecting arm, a first decorative cover being provided on the hinge cup, a second decorative cover being provided on the hinge cover, an axis connection assembly structure being provided between the hinge cup and the first decorative cover, the hinge cup and the first decorative cover being connected via the axis connection assembly structure, a snap-fit connection structure being provided between the hinge cover and the second decorative cover, the hinge cover and the second decorative cover being connected via the second decorative cover, a sliding connection structure being provided between the first decorative cover and the second decorative cover, the first decorative cover and the second decorative cover forming a relative sliding connection via the sliding connection structure; during the opening and closing process of the door hinge, the first decorative cover moves with the hinge cup and then slides on the second decorative cover of the hinge cover.

[0003] Based on the above, in the prior art, the first and second decorative covers are linked by a sliding connection structure. During the cabinet door opening or closing process, the second decorative cover is linked to the first decorative cover under the action of the sliding connection structure. A problem with this structure is that if the sliding connection structure connecting the first and second decorative covers interferes with the production process, assembly process, or later use, it can affect the linkage between the first and second decorative covers, easily causing the cabinet door to not open or close properly. This requires further improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems in the prior art. To this end, the utility model proposes a hidden hinge structure that adopts a torsion spring to automatically close.

[0005] A hidden hinge structure designed for this purpose includes a hinge cup, a hinge cup decorative cover, and a pin shaft, wherein the pin shaft is connected to the hinge cup and is rotatably connected to the hinge cup decorative cover, and the pin shaft sleeve is provided with a torsion spring;

[0006] The torsion spring is used to apply a force to the hinge cup decorative cover and the hinge cup, so that the hinge cup is kept in the hinge cup decorative cover to maintain it in a covered state.

[0007] Preferably, a holder is provided on the left and right sides of the hinge cup decorative cover respectively, the holder is provided with a pin hole, a bayonet is provided on the lower side of the pin hole, and the opening width of the bayonet is smaller than the diameter of the pin shaft.

[0008] Preferably, the hinge cup is detachably connected to a connecting piece, and the pin is rotatably provided on the connecting piece.

[0009] Preferably, the connecting member is provided with a first limit block and a second limit block extending backward, the first limit block and the second limit block are spaced apart from each other, and the front side of the hinge cup is inserted between the first limit block and the second limit block;

[0010] The hinge cup is provided with downwardly bent positioning parts on the left and right sides respectively, and the positioning parts abut against the left and right side walls of the second limit block;

[0011] Elastic clamping parts are respectively provided on the left and right sides of the rear side of the second limiting block, and the elastic clamping parts are abutted against the rear end surface of the positioning part.

[0012] Preferably, the connecting member is provided with connecting ear seats on the left and right sides respectively, and the pin shaft is rotatably provided on the connecting ear seats.

[0013] Preferably, a positioning groove is provided on the front side of the hinge cup, and the connecting piece is inserted into the positioning groove.

[0014] Preferably, the hinge cup is formed by stamping a plate or die-casting an alloy raw material.

[0015] Compared to the prior art, the present invention features a pin that is rotatably connected to the hinge cup and the hinge cup decorative cover, respectively. The pin sleeve is provided with a torsion spring, which is used to apply force to the hinge cup decorative cover and the hinge cup, thereby retaining the hinge cup within the hinge cup decorative cover and maintaining the hinge cup in the closed position. The present invention utilizes a torsion spring to constrain the relative position of the hinge cup and the hinge cup decorative cover. In the absence of any other external force, the hinge cup decorative cover, under the action of the torsion spring, covers the hinge cup, shielding it from leakage and affecting its aesthetics. The present invention's hinge cup decorative cover eliminates the need for a sliding connection structure and operates independently, avoiding interference between components that could affect the opening and closing of the cabinet door. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the cross-sectional structural diagrams of the hinge;

[0017] Figure 2 This is the second schematic diagram of the cross-sectional structure of the hinge;

[0018] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the hinge cup decorative cover;

[0020] Figure 5 This is one of the partial structural diagrams of the hinge;

[0021] Figure 6 This is the second schematic diagram of the local structure of the hinge;

[0022] Figure 7 Schematic diagram of the decomposition structure of the hinge;

[0023] Figure 8 This is a structural diagram of the hinge cup decorative cover in a closed state;

[0024] Figure 9 It is a structural diagram of the hinge cup decorative cover in the open state. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] See also Figures 1-9 A hidden hinge structure includes a hinge cup 10, a hinge cup decorative cover 20, and a pin 30. The pin 30 is connected to the hinge cup 10 and rotatably connected to the hinge cup decorative cover 20. A torsion spring 40 is sleeved on the pin 30. The torsion spring 40 is used to apply a force to the hinge cup decorative cover 20 and the hinge cup 10, thereby retaining the hinge cup 10 within the hinge cup decorative cover 20 and maintaining the hinge cup in the closed position. In this embodiment, the torsion spring is used to constrain the relative position of the hinge cup and the hinge cup decorative cover. In the absence of other external forces, the hinge cup decorative cover is closed on the hinge cup under the action of the torsion spring, thereby shielding the hinge cup and preventing leakage of the hinge cup and affecting the appearance.

[0027] See also Figure 8 and 9 When in use, the hinge cup 10 is fixed to the inside of the cabinet door 70, and the hinge arm assembly 60 hinged to the hinge cup 10 is connected to the cabinet body 80. During the opening and closing process of the cabinet door, the cabinet door 70 rotates relative to the cabinet body 80, that is, the hinge cup 10 moves relative to the hinge arm assembly 60.

[0028] See also Figure 8 In the figure, the hinge cup decorative cover 20 is in a covered state, that is, the cabinet door 70 is in an open state. In this state, the hinge cup decorative cover 20 shields the hinge cup 10 to prevent the hinge cup from leaking out and affecting the appearance.

[0029] See also Figure 9 In the figure, the hinge cup decorative cover 20 is in an open state, that is, the cabinet door 70 is in a closed state. In this state, the hinge cup decorative cover 20 covers the hinge arm assembly 60.

[0030] During the door opening process, the cabinet door 70 flips outward, which synchronously drives the hinge cup 10 and the hinge cup decorative cover 20 to move. During this process, the hinge cup decorative cover 20 gradually moves relative to the hinge arm assembly 60 until the cabinet door 70 is fully opened. The hinge cup decorative cover 20 is driven by the torsion force of the torsion spring 40 and covers the hinge cup 10.

[0031] During the door closing process, the cabinet door 70 closes inward, which synchronously drives the hinge cup 10 and the hinge cup decorative cover 20 to move. During this process, the hinge cup decorative cover 20 interferes with the hinge arm assembly 60, prompting the hinge cup decorative cover 20 to rotate relative to the hinge cup 10 with the pin 30 as the rotation axis, so that the hinge cup decorative cover 20 is flipped from the closed state to the open state until the cabinet door 70 is closed.

[0032] Based on the above, in the process of the hinge cup decorative cover 20 being flipped from the closed state to the open state, the hinge cup decorative cover 20 further twists the torsion spring 40, so that the torsion force of the torsion spring 40 is further increased. When the door is opened, this part of the torque will be released as the hinge cup decorative cover 20 gradually moves relative to the hinge arm assembly 60. When the hinge cup decorative cover 20 and the hinge arm assembly 60 do not interfere with each other, the torque will be released, so that the hinge cup decorative cover 20 is flipped from the open state to the closed state.

[0033] See also Figure 3 and Figure 4 The hinge cup decorative cover 20 has a holder 200 disposed on each side. The holder 200 is provided with a pin hole 210. A latch 220 is disposed below the pin hole 210. The opening width of the latch 220 is smaller than the diameter of the pin shaft 30. In this embodiment, the hinge cup decorative cover 20 is assembled with the hinge cup 10 by first installing the pin shaft 30 and the torsion spring 40 on the hinge cup 10. The hinge cup decorative cover 20 and the hinge cup 10 are then assembled by inserting the pin shaft 30 through the latch 220 and snapping it into the pin hole 210. When the pin shaft 30 is snapped into the latch 220 of the hinge cup decorative cover 20, the pin shaft 30 squeezes the latch 220, causing the holder 200 to deform and then enter the pin hole 210. The opening width of the latch 220 is smaller than the diameter of the pin shaft 30, which can constrain the pin shaft 30 and ensure that the pin shaft 30 remains in the pin hole 210 when no external force is applied.

[0034] See also Figures 5 to 7 The hinge cup 10 is detachably connected to a connecting piece 50 , and the pin 30 is rotatably disposed on the connecting piece 50 .

[0035] See also Figures 5 to 7 The connecting member 50 is provided with a first limit block 510 and a second limit block 520 extending backward. The first limit block 510 and the second limit block 520 are arranged at intervals up and down, and the front side of the hinge cup 10 is inserted between the first limit block 510 and the second limit block 520; the hinge cup 10 is respectively provided with a downwardly bent positioning portion 110 on the left and right sides, and the positioning portion 110 is abutted against the left and right side walls of the second limit block 520; the second limit block 520 is respectively provided with an elastic clamping portion 530 on the left and right sides, and the elastic clamping portion 530 is abutted against the rear end surface of the positioning portion 110.

[0036] The hinge cup 10 is inserted between the first limiting block 510 and the second limiting block 520 . This connection can constrain the vertical position of the hinge cup 10 and the connecting member 50 , preventing the two from moving up and down relative to each other.

[0037] The positioning portion 110 abuts against the left and right side walls of the second limiting block 520 . This connection can constrain the left and right positions of the hinge cup 10 and the connecting member 50 , preventing the two from moving relative to each other.

[0038] The elastic clamping portion 530 abuts against the rear end surface of the positioning portion 110 , thereby constraining the front-to-back positions of the hinge cup 10 and the connecting member 50 , and preventing the two from moving relative to each other.

[0039] See also Figures 5 to 7 The connector 50 is provided with connecting ears 500 on each side, and the pin 30 is rotatably mounted on the connecting ears 500. In this embodiment, the torsion spring 40 and the pin 30 are assembled by first placing the torsion spring 40 between the left and right connecting ears 500. The pin 30 is then inserted through the hole in one connecting ear 500, then through the hole in the center of the torsion spring 40, and finally through the hole in the other connecting ear 500. This completes the assembly of the connector 50, torsion spring 40, and pin 30.

[0040] See also Figure 5 A positioning groove 120 is provided on the front side of the hinge cup 10 , and the connecting piece 50 is inserted into the positioning groove 120 . The plug-in cooperation between the two can effectively enhance the connection stability between the hinge cup 10 and the connecting piece 50 .

[0041] In the present invention, the hinge cup 10 is formed by stamping a plate or die-casting an alloy material. Stamping or die-casting an alloy material can effectively simplify the processing technology and reduce production costs.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0043] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A hidden hinge structure, comprising a hinge cup (10), a hinge cup decorative cover (20), and a pin (30), wherein the pin (30) is connected to the hinge cup (10) and is rotatably connected to the hinge cup decorative cover (20), characterized in that: The pin shaft (30) is sleeved with a torsion spring (40); The torsion spring (40) is used to apply a force to the hinge cup decorative cover (20) and the hinge cup (10), so that the hinge cup (10) is kept in the hinge cup decorative cover (20) to maintain it in a covered state; A holder (200) is provided on the left and right sides of the hinge cup decorative cover (20), the holder (200) is provided with a pin hole (210), a bayonet (220) is provided on the lower side of the pin hole (210), and the opening width of the bayonet (220) is smaller than the diameter of the pin shaft (30); The hinge cup (10) is detachably connected to a connecting piece (50), and the pin shaft (30) is rotatably arranged on the connecting piece (50).

2. The hidden hinge structure according to claim 1, characterized in that: The connecting member (50) is provided with a first limiting block (510) and a second limiting block (520) extending backward, the first limiting block (510) and the second limiting block (520) are spaced apart from each other, and the front side of the hinge cup (10) is inserted between the first limiting block (510) and the second limiting block (520); The hinge cup (10) is provided with downwardly bent positioning portions (110) on the left and right sides, respectively, and the positioning portions (110) abut against the left and right side walls of the second limiting block (520); Elastic clamping parts (530) are respectively provided on the left and right sides of the rear side of the second limiting block (520), and the elastic clamping parts (530) are in contact with the rear end surface of the positioning part (110).

3. The hidden hinge structure according to claim 2, characterized in that: The connecting piece (50) is provided with connecting ear seats (500) on the left and right sides respectively, and the pin shaft (30) is rotatably provided on the connecting ear seats (500).

4. The hidden hinge structure according to claim 3, characterized in that: A positioning groove (120) is provided on the front side of the hinge cup (10), and the connecting member (50) is inserted into the positioning groove (120).

5. The hidden hinge structure according to claim 1, characterized in that: The hinge cup (10) is formed by stamping a plate or die-casting an alloy raw material.

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