Embedded hinge capable of being opened and closed smoothly

Abstract

The utility model relates to an embedded hinge capable of being opened and closed smoothly, which comprises an elastic mechanism arranged on a hinge fixed seat, a connecting rod arranged between the hinge fixed seat and a hinge movable seat and a transmission piece movably arranged relative to the hinge fixed seat, one end of the elastic mechanism elastically acts on the extension arm through the transmission part, the transmission part is in coupling connection with the elastic mechanism and / or the extension arm, and the transmission part moves along with one end of the elastic mechanism and / or the extension arm in the hinge opening and closing process. The transmission part and the extension arm do coupling motion, the problem that abrasion is caused by sliding friction between the transmission part and the extension arm is solved, the problem that the hinge has grading in the opening and closing process when two acting positions are switched due to the fact that an existing hinge arm is provided with two acting positions is also solved, opening and closing smoothness of the hinge is further improved, and the service life of the hinge is prolonged. The hinge cup is prevented from moving towards the closing direction when being opened by a certain angle, and the user is prevented from being accidentally injured when the hinge cup is closed again.

Description

Technical Field

[0001] This utility model relates to the technical field of furniture cabinet hardware accessories, specifically a recessed hinge that opens and closes smoothly, which is installed between the furniture cabinet body and the door body. Background Technology

[0002] Chinese Patent No. ZL201810731289.2 discloses an embedded hinge structure, including a hinge cup and a fixed bracket that are hinged to each other via a connecting arm assembly. The fixed bracket is provided with an elastic device and a damper. The connecting arm assembly includes at least a first connecting arm, with its two ends rotatably connected to the hinge cup and the fixed bracket, respectively. The first connecting arm is provided with an elastic part and a damping part. When the hinge cup is hinged open and / or closed to a certain position relative to the fixed bracket, the first connecting arm interacts with the elastic device through the elastic part to achieve elastic hinged opening and / or closing of the hinge cup relative to the fixed bracket. When the hinge cup is hinged closed to a certain position relative to the fixed bracket, the first connecting arm interacts with at least the damping part and the damper to achieve damped hinged closing of the hinge cup relative to the fixed bracket. During the hinge closing process, the first connecting arm slides relative to the transmission component. Under long-term use, friction between the first connecting arm and the transmission component due to sliding will cause wear between them.

[0003] To address the technical problem of frictional wear between the first connecting arm and the transmission component, Chinese Patent No. ZL202011025295.X discloses an embedded hinge, comprising a fixed seat with a built-in elastic transmission device, and a hinge cup that forms a hinged opening and closing engagement with the fixed seat through the connecting arm assembly. The connecting arm assembly includes a first connecting arm; the first connecting arm is provided with an elastic action part that cooperates with the elastic transmission device; a rolling element is provided at the position where the elastic action part cooperates with the elastic transmission device; a first limiting component is provided on the elastic action part and the elastic transmission device respectively; a second limiting component is provided in the fixed seat; the first limiting component and the second limiting component form a rolling area; during the opening and closing of the hinge, the elastic action part and the elastic transmission device respectively roll into contact with the rolling element, and the rolling element is limited to rolling within the rolling area. This invention effectively replaces the traditional hinge method where the transmission component directly slides into contact with the elastic part of the first connecting arm during opening and closing, thus solving the problem of wear caused by sliding contact. During the use of this hinge, the elastic transmission device generates closing and opening forces due to the rotation of the first connecting arm when the hinge cup is opened and closed. When the hinge cup is opened, the closing force cancels out the opening force due to the rolling action of the rolling component. This causes the hinge cup to shift towards the closing direction when it is opened to a certain angle, or even close again, accidentally injuring the user and affecting the user experience.

[0004] To address the technical problem of the hinge cup shifting towards the closing direction when opened to a certain angle, Chinese Patent No. ZL202111627970.0 discloses an embedded hinge suspension opening structure, including a hinge arm assembly, an elastic component, a hinge cup, and a bracket. The hinge arm assembly includes a first hinge arm; the elastic component includes an elastic element and a support element; the first hinge arm is rotatably connected to the hinge cup and the bracket, forming point A with the bracket; the first hinge arm has an extension, with a first hinge arm action position and a second hinge arm action position on the extension; the elastic element acts elastically on the bracket and the support element, forming point B with the bracket; the support element has a support recess, and the support element acts elastically on the extension through the elastic element, and when the first hinge arm rotates...

[0005] Through the interaction between the supporting recess and the first and second working positions of the hinge arm; a straight X-line is formed between points A and B; the hinge cup is in a certain hinged position, and the supporting recess and the first working position of the hinge arm...

[0006] When the action positions of the hinge arm and the second action position are close to or located on the X-line, the hinge cup is suspended and opened on the bracket, which is highly practical. The extension of the first hinge arm of this hinge has a first action position and a second action position. During the opening and closing of the hinge, when the first hinge arm swings to the corresponding position angle, the first and second action positions alternately act on the support recess. The transition between the two action positions during opening and closing results in a stepped effect, making the hinge opening and closing less smooth. Therefore, further improvement is needed. Utility Model Content

[0007] The purpose of this utility model is to provide a smoothly opening and closing embedded hinge. One end of the elastic mechanism acts elastically on the extension arm via a transmission component. A contact point A is provided between the elastic mechanism and the transmission component, and a contact point B is provided between the transmission component and the connecting rod extension arm. Through contact points A and B, the transmission component is coupled to the elastic mechanism and / or the extension arm. The transmission component is rolled or oscillating (movably) mounted on the hinge fixing seat. During the opening and closing of the hinge, the transmission component moves along with one end of the elastic mechanism and / or the extension arm. The transmission component and the extension arm are coupled through the abutting contact point B, which can be understood as the transmission component and the extension arm forming a relative limiting and locking motion through the abutting contact point B. This solves the problem of wear caused by sliding friction between the transmission component and the extension arm, and also solves the problem of the hinge having two action points in the past, which caused the hinge to have a step-by-step motion during the opening and closing process when the two action points were switched. This further improves the smoothness of the hinge opening and closing, and also prevents the hinge cup (hinge moving seat) from displacing in the closing direction when it is opened to a certain angle, preventing the hinge cup from accidentally injuring the user when it closes again.

[0008] The purpose of this utility model is achieved as follows:

[0009] A smoothly opening and closing recessed hinge includes an elastic mechanism mounted on a hinge fixed seat and a connecting rod disposed between the hinge fixed seat and a hinge movable seat. One end of the connecting rod is connected to the hinge movable seat. The hinge also includes a transmission component movably disposed relative to the hinge fixed seat. An extension arm is provided on the connecting rod. One end of the elastic mechanism elastically acts on the extension arm through the transmission component. The transmission component is coupled to the elastic mechanism and / or the extension arm. The transmission component moves with one end of the elastic mechanism and / or the extension arm during the opening and closing of the hinge. One end of the elastic mechanism elastically acts on the extension arm through the transmission component. A contact point A is provided between the elastic mechanism and the transmission component, and a contact point B is provided between the transmission component and the connecting rod extension arm. Through contact points A and B, the transmission component and the elastic mechanism and / or the extension arm move together. The extension arm is coupled and connected, and the transmission component is rolled or oscillating (moving) on ​​the hinge fixed seat. During the opening and closing of the hinge, the transmission component moves with one end of the elastic mechanism and / or the extension arm. The transmission component and the extension arm are coupled through the abutting contact point B. This can be understood as the transmission component and the extension arm forming a relative limiting and locking motion through the abutting contact point B. This solves the problem of wear caused by sliding friction between the transmission component and the extension arm, and also solves the problem of the hinge having two action points in the past, which caused the hinge to have a step-like movement during the opening and closing process when the two action points were switched. This further improves the smoothness of the hinge opening and closing, and also prevents the hinge cup (hinge moving seat) from displacing in the closing direction when it is opened to a certain angle, preventing the hinge cup from accidentally injuring the user when it closes again.

[0010] A swing fulcrum C is provided between the connecting rod and the hinge fixed seat. During the opening and closing of the hinge, the connecting rod swings along the swing fulcrum C, and the elastic mechanism changes the direction of the swing force of the connecting rod through the transmission component. When the hinge is open, the elastic mechanism drives the connecting rod to swing through the transmission component, realizing the elastic opening of the hinge. When the connecting rod swings to the corresponding position angle under the elastic drive of the elastic mechanism, when the contact point A, the contact point B, the swing fulcrum C, and the swing position are on the same straight line L, the pressure angle of the elastic mechanism is 90°, forming a dead point of the connecting rod mechanism. This prevents the hinge cup (hinge movable seat) from displacing in the closing direction when it is opened to a certain angle, and prevents the hinge cup from closing again and accidentally injuring the user. This realizes that the elastic mechanism changes the direction of the swing force of the connecting rod through the transmission component.

[0011] One end of the elastic mechanism is provided with a first arc-shaped action part between it and the transmission component. The elastic mechanism and the transmission component form point contact, line contact or surface contact through the first arc-shaped action part. When the transmission component moves with the elastic mechanism and / or the connecting rod, the elastic mechanism and the transmission component form an arc-shaped swing contact or rolling contact through the first arc-shaped action part. This ensures that the elastic mechanism and the transmission component form an arc-shaped swing contact or rolling contact during the opening and closing of the hinge, effectively reducing friction and wear between the elastic mechanism and the transmission component, and achieving the technical effect of quiet opening and closing and smooth opening and closing of the hinge.

[0012] A second arc-shaped contact is provided between the transmission component and the extension arm of the connecting rod. The transmission component and the extension arm form point contact, line contact, or surface contact through the second arc-shaped contact. When the transmission component moves with the elastic mechanism and / or the extension arm, the transmission component and the extension arm form an arc-shaped swing contact or rolling contact through the second arc-shaped contact. This ensures that the connecting rod extension arm and the transmission component form an arc-shaped swing contact or rolling contact during the opening and closing of the hinge, effectively reducing friction and wear between the connecting rod extension arm and the transmission component, and achieving the technical effect of quiet opening and closing and smooth opening and closing of the hinge. Due to the arc-shaped swinging or rolling contact between the transmission component and the extension arm of the connecting rod, the closing force cancels out the opening force, causing the hinge cup to displace in the closing direction when it opens to a certain angle (the connecting rod will displace in the closing direction). However, when the connecting rod swings to the corresponding position angle under the elastic drive of the elastic mechanism, when the contact point A, the contact point B, the swing fulcrum C, and the swing position are on the same straight line L, the pressure angle of the elastic mechanism is 90°, forming a dead point of the connecting rod mechanism. The connecting rod will not displace in the closing direction, thus realizing that the elastic mechanism changes the direction of the swinging force of the connecting rod through the transmission component.

[0013] The oscillating or rolling mechanism of the transmission component is mounted on the hinge mounting base.

[0014] A positioning swing part is provided between the hinge fixing seats. When the transmission component moves with the elastic mechanism and / or the extension arm during the opening and closing of the hinge, the transmission component is positioned and swings on the hinge fixing seat through the positioning swing part.

[0015] The transmission component is provided with a first arc-shaped limiting groove, and the extension arm of the connecting rod acts on the first arc-shaped limiting groove. During the opening and closing of the hinge, the transmission component swings on the hinge fixing seat along with one end of the elastic mechanism and / or the extension arm, and the extension arm is relatively limited on the first arc-shaped limiting groove of the transmission component during the hinge closing process. The first arc-shaped limiting groove forms an abutting contact position B, which couples the transmission component and the extension arm. This can be understood as the transmission component and the extension arm forming a relative limiting and engaging motion through the abutting contact position B (the extension arm always acts on this point of the transmission component through the abutting contact position B during the hinge closing process), thus solving the problem of wear caused by sliding friction between the transmission component and the extension arm.

[0016] The transmission component is a rolling element, and the extension arm is provided with a second arc-shaped limiting groove. When the transmission component moves along one end of the elastic mechanism and / or the extension arm, the rolling element is limited and rolled between the second arc-shaped limiting groove and the elastic mechanism. The second arc-shaped limiting groove forms an abutting contact position B, which couples the transmission component and the extension arm. This can be understood as the transmission component and the extension arm forming a relative limiting engagement movement through the abutting contact position B (the extension arm always acts on the transmission component at this point during the hinge closure process through the abutting contact position B), thus solving the problem of wear caused by sliding friction between the transmission component and the extension arm.

[0017] The other end of the elastic mechanism has a swing position between it and the hinge fixing seat. The elastic mechanism swings on the hinge fixing seat through the swing position. During the opening and closing of the hinge, the elastic mechanism swings and transmits power to the transmission component to change the direction of the force on the connecting rod. The transmission component follows the swing of the elastic mechanism during the opening and closing of the hinge and moves on the hinge fixing seat accordingly.

[0018] An embedded hinge that opens and closes smoothly also includes a buffer set on the hinge mounting base. When the connecting rod swings to the corresponding position angle during the hinge closing process, the connecting rod acts on the buffer to achieve the buffered closing of the hinge.

[0019] The beneficial effects of this utility model are as follows:

[0020] One end of the elastic mechanism acts elastically on the extension arm via a transmission component. A contact point A is provided between the elastic mechanism and the transmission component, and a contact point B is provided between the transmission component and the connecting rod extension arm. Contact points A and B couple the transmission component with the elastic mechanism and / or the extension arm. The transmission component is rolled or oscillating (movably) mounted on the hinge mounting base. During hinge opening and closing, the transmission component moves along with one end of the elastic mechanism and / or the extension arm, and the transmission component and the extension arm are connected by a contact point. Contact point B enables the transmission component and the extension arm to couple their movements. This can be understood as the transmission component and the extension arm forming a relative limiting and engaging motion by abutting against contact point B. This solves the problem of wear caused by sliding friction between the transmission component and the extension arm. It also solves the problem of the hinge having two action points in the past, where the hinge had a stepped motion during opening and closing when switching between the two action points. This further improves the smoothness of the hinge opening and closing and prevents the hinge cup (hinge moving seat) from shifting towards the closing direction when it is opened to a certain angle, thus preventing the hinge cup from accidentally injuring the user when it closes again. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a transmission component swinging on a hinge fixing seat according to an embodiment of the present invention, and the linkage mechanism forming a dead point.

[0022] Figure 2 This is a schematic diagram of a transmission component swinging on a hinge fixing seat according to an embodiment of the present invention, with the connecting rod open.

[0023] Figure 3 This is a schematic diagram of a transmission component swinging on a hinge fixing seat according to an embodiment of the present invention, with the hinge closed.

[0024] Figure 4 This is a schematic diagram showing the disassembled assembly of the transmission component on the hinge fixing seat, as an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the transmission component, connecting rod, and elastic mechanism coupled together according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of a transmission component that is rolled on a hinge fixing seat according to an embodiment of the present invention, and the connecting rod is open.

[0027] Figure 7 This is a schematic diagram of a transmission component that is rolled on a hinge fixing seat according to an embodiment of the present invention, and the connecting rod is opened to another position angle.

[0028] Figure 8 This is a three-dimensional structural diagram of a transmission component that is rolled on a hinge fixing seat according to an embodiment of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] See Figures 1-8 An embedded hinge that opens and closes smoothly includes an elastic mechanism 2 disposed on a hinge fixed seat 1 and a connecting rod 4 disposed between the hinge fixed seat 1 and the hinge movable seat 3. One end of the connecting rod 4 is connected to the hinge movable seat 3. The hinge also includes a transmission member 5 that is movably disposed relative to the hinge fixed seat 1. An extension arm 6 is provided on the connecting rod 4. One end of the elastic mechanism 2 acts elastically on the extension arm 6 through the transmission member 5. The transmission member 5 is coupled to the elastic mechanism 2 and / or the extension arm 6. The transmission member 5 moves with one end of the elastic mechanism 2 and / or the extension arm 6 during the opening and closing of the hinge.

[0031] In this embodiment, the elastic mechanism 2 includes a movable rod, a telescopic rod telescopically mounted on the movable rod, and a compression spring sleeved on the outside of the movable rod and the telescopic rod. The movable rod is provided with a first limiting ring, and the telescopic rod is provided with a second limiting ring. One end of the compression spring acts elastically on the first limiting ring, and the other end of the compression spring acts elastically on the second limiting ring. During the opening and closing of the hinge, the compression spring compresses or releases its elastic force, and the telescopic rod telescopically extends and retracts on the movable rod following the movement of the compression spring.

[0032] In this embodiment, a contact point A is provided between one end of the telescopic rod and the transmission component 5. When the hinge is closed, the extension arm 6 of the connecting rod 4 drives the telescopic rod to retract into the movable rod through the transmission component 5, thereby squeezing and compressing the spring, and compressing the elastic mechanism 2.

[0033] In this embodiment, when the hinge is opened, the extension arm 6 of the connecting rod 4 swings, the transmission component 5 moves accordingly, the compression spring of the elastic mechanism 2 releases its elasticity from the compressed state, drives the telescopic rod to extend elastically and acts elastically on the transmission component 5 and the extension arm 6 of the connecting rod 4, and drives the extension arm 6 of the connecting rod 4 to open elastically.

[0034] A swing fulcrum C is provided between the connecting rod 4 and the hinge fixing seat 1; the connecting rod 4 swings along the swing fulcrum C during the opening and closing of the hinge, and the elastic mechanism 2 changes the direction of the swing force of the connecting rod 4 through the transmission component 5.

[0035] In this embodiment, a contact point B is provided between the transmission component 5 and the extension arm 6 of the connecting rod 4. When the hinge is open, the elastic mechanism 2 drives the connecting rod 4 to swing through the transmission component 5, thereby achieving the elastic opening of the hinge. When the connecting rod 4 swings to the corresponding position angle under the elastic drive of the elastic mechanism 2, when the contact point A, the contact point B, the swing fulcrum C, and the swing position 12 are on the same straight line L, the pressure angle of the elastic mechanism 2 is 90°, forming a dead point of the connecting rod mechanism. This prevents the hinge cup (hinge movable seat 3) from displacing in the closing direction when it is opened to a certain angle, and prevents the hinge cup from accidentally injuring the user when it closes again. This allows the elastic mechanism 2 to change the direction of the swing force of the connecting rod 4 through the transmission component 5.

[0036] In this embodiment, when the hinge movable seat 3 is hinged and closed to a certain position relative to the hinge fixed seat 1, and when the abutment contact position A and abutment contact position B are located outside the straight line L, the elastic mechanism 2 generates a closing force on the connecting rod 4 through the transmission member 5, and drives the hinge movable seat 3 to automatically hinge and close on the hinge fixed seat 1, so that the elastic mechanism 2 changes the swing force direction of the connecting rod 4 through the transmission member 5.

[0037] One end of the elastic mechanism 2 is provided with a first arc surface working part 7 between it and the transmission member 5. The elastic mechanism 2 and the transmission member 5 form point contact, line contact or surface contact through the first arc surface working part 7. When the transmission member 5 moves with the elastic mechanism 2 and / or the connecting rod 4, the elastic mechanism 2 and the transmission member 5 form an arc-shaped swing contact or rolling contact through the first arc surface working part 7.

[0038] A second arc-shaped action part 8 is provided between the transmission member 5 and the extension arm 6 of the connecting rod 4. The transmission member 5 and the extension arm 6 form point contact, line contact or surface contact through the second arc-shaped action part 8. When the transmission member 5 moves with the elastic mechanism 2 and / or the extension arm 6, the transmission member 5 and the extension arm 6 form an arc-shaped swing contact or rolling contact through the second arc-shaped action part 8.

[0039] The transmission component 5 is oscillating or rolling on the hinge fixing seat 1.

[0040] A positioning swing part 9 is provided between the hinge fixing bases 1, and the transmission component 5 is oscillatingly mounted on the hinge fixing base 1 through the positioning swing part 9.

[0041] See Figures 1-5 In this embodiment, the positioning swing part 9 includes a positioning pin disposed on the hinge fixing seat 1 and a strip groove disposed on the transmission member 5. During the opening and closing of the hinge, the positioning pin slides relative to the limiting position on the strip groove.

[0042] The transmission component 5 is provided with a first arc-shaped limiting groove 10, and the extension arm 6 of the connecting rod 4 acts on the first arc-shaped limiting groove 10; during the opening and closing of the hinge, the transmission component 5 follows one end of the elastic mechanism 2 and / or the extension arm 6 to swing on the hinge fixing seat 1, and the extension arm 6 is relatively limited on the first arc-shaped limiting groove 10 of the transmission component 5 during the closing of the hinge.

[0043] In this embodiment, the first arc-shaped limiting groove 10 includes an arc-shaped limiting groove provided on the transmission member 5 and an arc-shaped protrusion provided on the extension arm 6, with the arc-shaped protrusion embedded and limiting on the arc-shaped limiting groove.

[0044] See Figures 6-8 The transmission component 5 is a rolling component, and the extension arm 6 is provided with a second arc-shaped limiting groove 11. When the transmission component 5 moves with one end of the elastic mechanism 2 and / or the extension arm 6, the rolling component is limited to rolling between the second arc-shaped limiting groove 11 and the elastic mechanism 2.

[0045] In this embodiment, the rolling element is a cylindrical pin or a rolling ball.

[0046] In this embodiment, the arc surface of the cylindrical pin or rolling ball forms an arc-shaped contact with the second arc-shaped limiting groove 11.

[0047] The other end of the elastic mechanism 2 is provided with a swing position 12 between it and the hinge fixing seat 1. The elastic mechanism 2 swings on the hinge fixing seat 1 through the swing position 12. During the opening and closing of the hinge, the elastic mechanism 2 swings and transmits to the transmission component 5 to change the force direction of the connecting rod 4.

[0048] In this embodiment, the hinge fixing seat 1 is provided with a mounting plate, and the mounting plate is provided with a spherical groove. The end of the movable rod of the elastic mechanism 2 is spherical and is limited in the spherical groove on the mounting plate.

[0049] In this embodiment, the mounting plate is provided with a bending block, and a spherical groove is provided on the bending block.

[0050] An embedded hinge that opens and closes smoothly also includes a buffer 13 disposed on the hinge fixing seat 1. When the connecting rod 4 swings to the corresponding position angle during the hinge closing process, the connecting rod 4 acts on the buffer 13 to achieve the buffered closing of the hinge.

[0051] In this embodiment, an arc-shaped bending action position 14 is provided between the connecting rod 4 and the buffer 13. When the connecting rod 4 swings to the corresponding position angle during the hinge closing process, the connecting rod 4 forms an arc-shaped swing contact with the buffer 13 through the arc-shaped bending action position 14, thereby achieving the effect of silent opening and closing and smooth opening and closing of the hinge.

[0052] In this embodiment, the hinge fixing seat 1 is provided with a mounting cavity for the user to install the elastic mechanism 2, the transmission component 5, and the buffer 13. The elastic mechanism 2, the transmission component 5, and the buffer 13 are then positioned and installed in conjunction with two spaced mounting plates.

[0053] In this embodiment, buffer 13 is existing technology and will not be described in detail here.

[0054] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flush hinge that opens and closes smoothly, comprising an elastic mechanism (2) arranged on a hinge fixing seat (1), and a connecting rod (4) arranged between the hinge fixing seat (1) and a hinge movable seat (3), wherein one end of the connecting rod (4) is connected to the hinge movable seat (3), and is characterized in that: The hinge also comprises a transmission member (5) movably arranged relative to the hinge fixing seat (1); an extension arm (6) is arranged on the connecting rod (4); one end of the elastic mechanism (2) elastically acts on the extension arm (6) through the transmission member (5); the transmission member (5) is coupled to the elastic mechanism (2) and / or the extension arm (6); and the transmission member (5) moves along with one end of the elastic mechanism (2) and / or the extension arm (6) during the opening and closing process of the hinge.

2. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: A swing fulcrum C is provided between the connecting rod (4) and the hinge fixing seat (1); the connecting rod (4) swings along the swing fulcrum C during the opening and closing process of the hinge, and the elastic mechanism (2) changes the swing force direction of the connecting rod (4) through the transmission member (5).

3. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: A first arc surface action portion (7) is provided between one end of the elastic mechanism (2) and the transmission member (5); point contact, line contact or surface contact is formed between the elastic mechanism (2) and the transmission member (5) via the first arc surface action portion (7); and when the transmission member (5) moves following the elastic mechanism (2) and / or the connecting rod (4), arc-shaped swinging contact or rolling contact is formed between the elastic mechanism (2) and the transmission member (5) via the first arc surface action portion (7).

4. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: A second arc surface action portion (8) is provided between the transmission member (5) and the extension arm (6) of the connecting rod (4); point contact, line contact or surface contact is formed between the transmission member (5) and the extension arm (6) via the second arc surface action portion (8); when the transmission member (5) moves following the elastic mechanism (2) and / or the extension arm (6), arc-shaped swinging contact or rolling contact is formed between the transmission member (5) and the extension arm (6) via the second arc surface action portion (8).

5. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: The transmission member (5) is swingably or rollingly arranged on the hinge fixing seat (1).

6. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: A positioning swing portion (9) is provided between the hinge fixing seat (1), and the transmission member (5) is swingably arranged on the hinge fixing seat (1) via the positioning swing portion (9).

7. The embedded hinge with smooth opening and closing according to claim 6, characterized in that: A first arc-shaped limiting groove (10) is provided on the transmission member (5), and an extension arm (6) of the connecting rod (4) acts on the first arc-shaped limiting groove (10); during the opening and closing process of the hinge, the transmission member (5) swings on the hinge fixing seat (1) following one end of the elastic mechanism (2) and / or the extension arm (6), and the extension arm (6) is relatively limited on the first arc-shaped limiting groove (10) of the transmission member (5) during the closing process of the hinge.

8. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: The transmission member (5) is a rolling member, and a second arc-shaped limiting groove portion (11) is provided on the extension arm (6). When the transmission member (5) moves following one end of the elastic mechanism (2) and / or the extension arm (6), the rolling member is limited and rolls between the second arc-shaped limiting groove portion (11) and the elastic mechanism (2).

9. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: A swing position (12) is provided between the other end of the elastic mechanism (2) and the hinge fixing seat (1), and the elastic mechanism (2) swings on the hinge fixing seat (1) via the swing position (12); during the opening and closing process of the hinge, the elastic mechanism (2) acts on the transmission member (5) by swinging and transmitting, so as to change the force direction of the connecting rod (4).

10. The embedded hinge with smooth opening and closing according to claim 1, characterized in that: It also includes a buffer (13) arranged on the hinge fixing seat (1); when the connecting rod (4) swings to a corresponding position angle during the hinge closing process, the connecting rod (4) acts on the buffer (13) to achieve buffered closing of the hinge.

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