Hidden hinge bumper

Abstract

The present invention relates to a concealed hinge buffer, comprising: a buffer body having a main oil chamber and an oil circuit interconnected therein; a piston slidably disposed within the buffer body, the piston having a drive portion located within the main oil chamber and separating the main oil chamber into first and second chambers; an elastic member disposed within the buffer body and connected to the piston; and a regulating valve movably disposed on the buffer body, the regulating valve extending into the oil circuit and movable to adjust the amount of oil entering the oil circuit; the piston being able to slide toward the outside of the buffer body to allow oil in the second chamber to flow through the oil circuit into the first chamber, and the piston being able to slide toward the inside of the buffer body to allow oil in the first chamber to flow through the oil circuit into the second chamber. This concealed hinge buffer can be directly concealed for installation, is not restricted by the site, and can adjust the buffering force by controlling the oil pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of hinge auxiliary devices, in particular to a hidden hinge buffer. Background Art

[0002] In daily life, hinges are generally used to connect two objects so that they can rotate relative to each other. The role of hinges is particularly important when installing doors.

[0003] To enhance the aesthetics of hinged doors, a design has been developed that hides the hinge within the doorframe. To protect the door from damage during use, consideration must be given to the force applied during closing and opening, with the force gradually decreasing as the door approaches the doorframe. Currently, this is achieved by using springs, but these are limited by the building structure and difficult to install. Furthermore, the force of the springs is entirely dependent on their elasticity, making it impossible to adjust the force applied based on the operator's input. Summary of the Invention

[0004] Based on this, it is necessary to provide a hidden hinge buffer that can be directly hidden and installed, is not restricted by the site, and can adjust the buffering force by controlling the oil pressure to address the problem that the hidden hinge buffer structure is difficult to install and cannot adapt to the adjustment of the buffering force.

[0005] A hidden hinge buffer, comprising:

[0006] The buffer body has a main oil chamber and an oil circuit connected thereto;

[0007] a piston slidably disposed in the buffer body, and the piston has a driving portion, the driving portion is located in the main oil chamber and divides the main oil chamber into a first cavity and a second cavity;

[0008] an elastic member disposed in the buffer body and connected to the piston, wherein the piston moves toward the outside of the buffer body to compress the elastic member, and under the elastic restoring force of the elastic member, the piston can return to the buffer body; and

[0009] A regulating valve is movably provided on the buffer body, and the regulating valve extends into the oil circuit. The regulating valve can movably adjust the amount of oil entering the oil circuit; the piston can slide toward the outside of the buffer body so that the oil in the second cavity flows into the first cavity through the oil circuit, and the piston can slide toward the inside of the buffer body so that the oil in the first cavity flows into the second cavity through the oil circuit.

[0010] The above-mentioned hidden hinge buffer has a buffer body that can be hidden and installed in the door frame, and a piston connected to the hinge. When the door needs to be opened, the piston is driven and moved toward the outside of the buffer body. The driving unit compresses the space in the second cavity and causes the oil in the second cavity to flow to the first cavity through the oil circuit. At the same time, the elastic member is compressed. During the door opening process, the oil in the second cavity is squeezed to form a door-opening buffer force. When the door needs to be closed, the piston is driven and moved toward the inside of the buffer body. The driving unit compresses the space in the first cavity and causes the oil in the first cavity to flow to the second cavity through the oil circuit. At the same time, the elastic member provides an elastic restoring force. When the door is just beginning to close, the elastic force is the largest. The closer it is to the closed state, the smaller the elastic force. During the door closing process, the oil in the first cavity is squeezed to form a door-closing buffer force. The closing speed is slow, and the impact force generated when closing the door is small. In addition, the regulating valve can move to adjust the amount of oil entering the oil circuit to adjust the oil pressure when the first cavity or the second cavity is compressed, thereby achieving adjustment of the buffer force. When in use, it does not take up space, is noiseless, and the speed of opening and closing the door can be adjusted according to the weight of the door.

[0011] In one embodiment, the buffer body includes a buffer body and a buffer sleeve. The buffer body is provided with the main oil chamber and the oil circuit, and the regulating valve is provided on the buffer body. One end of the buffer sleeve is connected to the buffer body, and one end of the piston extends into the buffer sleeve. A blocking portion is protruding from the end of the piston. The elastic member is sleeved on the piston, and the two ends of the elastic member respectively abut against the blocking portion and the inner wall of the buffer sleeve. This facilitates the concealed design of the elastic member, and the elastic matching structure between the elastic member and the piston is more stable.

[0012] In one embodiment, the oil passage includes a first flow channel and a second flow channel, the first flow channel includes a first opening and a second opening spaced apart from each other, the first opening communicates with the second cavity, and the second opening communicates with the first cavity, and the piston slides toward the outside of the buffer body so that the oil in the second cavity flows into the first cavity through the first opening and the second opening;

[0013] The second flow channel includes a third opening and a fourth opening spaced apart from each other. The third opening communicates with the first cavity, and the fourth opening communicates with the second cavity. The piston slides into the interior of the buffer body, causing the oil in the first cavity to flow into the second cavity through the third and fourth openings. The first and second flow channels are unidirectional, forming independent door-opening and door-closing buffer channels, ensuring smoother oil flow and more stable buffering when the door is opened or closed.

[0014] In one embodiment, a first baffle and a second baffle are further included. A driving channel connected to the main oil chamber is provided within the driving portion. A first movable chamber connected to the driving channel is provided on the side of the driving portion facing the first chamber. A second movable chamber connected to the driving channel is provided on the side of the driving portion facing the second chamber. The first baffle is movably provided in the first movable chamber, and the second baffle is movably provided in the second movable chamber. The piston slides toward the outside of the buffer body to connect the driving channel with the second opening, and the first baffle opens the first movable chamber, while the second baffle closes the second movable chamber. The piston slides toward the inside of the buffer body to connect the driving channel with the fourth opening, and the second baffle opens the second movable chamber, while the first baffle closes the first movable chamber. This ensures that when the piston slides, corresponding oil circuits are formed when it reaches different positions, and the coordinated closing and opening of the first and second baffles can enhance the one-way flow effect of the first and second channels.

[0015] In one embodiment, the driving channel includes a first intermediate channel extending along a first direction and a second intermediate channel extending along a second direction perpendicular to the first direction. The first intermediate channel and the second intermediate channel are cross-connected, and the opposite ends of the first intermediate channel are respectively connected to the first active chamber and the second active chamber. The piston slides to connect one end of the second intermediate channel with the second opening, or to connect the other end of the second intermediate channel with the fourth opening.

[0016] In one embodiment, a protruding first flange and a second flange are provided on the outer side of the driving portion at intervals, the first flange abuts against the inner wall of the main oil chamber to form the first cavity, the second flange abuts against the inner wall of the main oil chamber to form the second cavity, and the second intermediate channel is located between the first flange and the second flange.

[0017] In one embodiment, the first opening includes a plurality of spaced slots, and the regulating valve includes a first oil valve. The first oil valve is movable from the outside of the buffer body to extend into the first flow channel, and the first oil valve is movable to open or close the slots to adjust the amount of oil entering the first flow channel. The coordinated structure of the first oil valve and the plurality of slots enables simple and effective regulation of the amount of oil entering the first flow channel, thereby effectively adjusting the magnitude of the buffering force.

[0018] In one embodiment, the second flow channel includes a first branch and a second branch separated by a gap. One end of each of the first branch and the second branch communicates with the first cavity, and the other ends of each of the first branch and the second branch are staggered along a first direction. The piston slides to cause the oil in the first cavity to flow into the second cavity through the first branch and / or the second branch. At different closing angles, one branch can be connected or both branches can be connected simultaneously, enabling the adaptive supply of oil according to the required cushioning force for closing the door.

[0019] In one embodiment, the regulating valve further includes a second oil valve and a third oil valve, wherein the second oil valve moves from the outside of the buffer body to extend into the first branch, and a gap is formed between the second oil valve and the inner wall of the first branch; the third oil valve moves from the outside of the buffer body to extend into the second branch, and a gap is formed between the third oil valve and the inner wall of the second branch.

[0020] In one embodiment, the second oil valve has a first tapered end, the first tapered end is inserted into the first branch, and the second oil valve is capable of moving to adjust the gap between the first tapered end and the inner wall of the first branch;

[0021] The third oil valve has a second tapered end that is inserted into the second branch flow. The third oil valve is movable to adjust the gap between the second tapered end and the inner wall of the second branch flow. The tapered second and third oil valves enable simple and effective regulation of the amount of oil entering the first and second branches, thereby effectively adjusting the buffering force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of an embodiment of a hidden hinge buffer of the present invention;

[0023] Figure 2 A cross-sectional view of the hidden hinge buffer of the present invention in the door-opening state;

[0024] Figure 3 is a cross-sectional view of an embodiment of a hidden hinge buffer of the present invention;

[0025] Figure 4 A cross-sectional view of the hidden hinge buffer of the present invention in the closed door state;

[0026] Figure 5 This is a cross-sectional view of the hidden hinge buffer of the present invention in the second closed state;

[0027] Figure 6 This is a cross-sectional view of the hidden hinge buffer of the present invention in the third closed state.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 100. Hidden hinge buffer; 1. Buffer body; 11. Main oil chamber; 111. First cavity; 112. Second cavity; 12. Oil circuit; 121. First flow channel; 1211. First opening; 12111. Slot; 1212. Second opening; 122. First tributary; 123. Second tributary; 13. Buffer body; 14. Buffer sleeve; 2. Piston; 21. Driving part; 211. Driving flow channel; 2111. First intermediate channel; 2112. Second intermediate channel; 212. First active cavity; 213. Second active cavity; 214. First flange; 215. Second flange; 22. Blocking part; 3. Elastic member; 4. Regulating valve; 41. First oil valve; 42. Second oil valve; 421. First tapered end; 43. Third oil valve; 431. Second tapered end; 51. First baffle; 52. Second baffle. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following is a clear and complete description of the specific embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the specific details described below are only some embodiments of the present invention, and the present invention can also be implemented in many other embodiments different from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] See also Figures 1 to 3In one embodiment, a hidden hinge buffer 100 includes: a buffer body 1, a piston 2, an elastic member 3 and a regulating valve 4. The buffer body 1 has a main oil chamber 11 and an oil circuit 12 that are connected to each other. The piston 2 is slidably arranged in the buffer body 1, and the piston 2 has a driving part 21. The driving part 21 is located in the main oil chamber 11 and divides the main oil chamber 11 into a first cavity 111 and a second cavity 112. The elastic member 3 is arranged in the buffer body 1, and the elastic member 3 is connected to the piston 2. The piston 2 moves toward the outside of the buffer body 1 so that the elastic member 3 is compressed. Under the elastic restoring force of the elastic member 3, the piston 2 can return to the buffer body 1. The regulating valve 4 is movably arranged on the buffer body 1, and the regulating valve 4 extends into the oil circuit 12. The regulating valve 4 can be moved to adjust the amount of oil entering the oil circuit 12.

[0034] In the hidden hinge buffer 100, the buffer body 1 can be hidden and installed in the door frame, and the piston 2 is connected to the hinge. When the door needs to be opened, the piston 2 is driven and moves toward the outside of the buffer body 1. The driving part 21 compresses the space in the second cavity 112 and causes the oil in the second cavity 112 to flow to the first cavity 111 through the oil path 12. At the same time, the elastic member 3 is compressed. During the door opening process, the oil in the second cavity 112 is squeezed to form a door opening buffer force. When the door needs to be closed, the piston 2 is driven and moves toward the inside of the buffer body 1. The driving part 21 compresses the space in the first cavity 111 and causes the oil in the first cavity 111 to flow to the second cavity 112 through the oil path 12. At the same time, the elastic member 3 provides an elastic restoring force. When the door is just beginning to close, the elastic force is the largest. The closer it is to the closed state, the smaller the elastic force. During the door closing process, the oil in the first cavity 111 is squeezed to form a door closing buffer force. The door closing speed is slow and the impact force generated when closing is small. Furthermore, the regulating valve 4 can be moved to adjust the amount of oil entering the oil passage 12, thereby adjusting the oil pressure when the first cavity 111 or the second cavity 112 is compressed, thereby adjusting the buffering force. When in use, the regulating valve 4 does not take up space, is silent, and can adjust the door opening and closing speed according to the weight of the door.

[0035] See also Figure 1 and Figure 2 In one embodiment of the buffer body 1, the buffer body 1 includes a buffer body 13 and a buffer sleeve 14. The buffer body 13 is provided with a main oil chamber 11 and an oil circuit 12, and the regulating valve 4 is provided on the buffer body 13. The buffer sleeve 14 is hollow inside and one end is connected to the buffer body 13. One end of the piston 2 extends into the buffer sleeve 14, and a blocking portion 22 is protruding on the outer side of the end of the piston 2. The elastic member 3 is sleeved on the piston 2, and the two ends of the elastic member 3 are respectively in contact with the blocking portion 22 and the inner wall of the buffer sleeve 14. The elastic member 3 can be a spring. This structure of the buffer body 1 facilitates the hidden design of the elastic member 3, and the elastic matching structure of the elastic member 3 and the piston 2 is more stable.

[0036] See also Figure 2 In one embodiment, the oil circuit 12 includes a first flow channel 121 and a second flow channel. The first flow channel 121 includes a first opening 1211 and a second opening 1212 spaced apart. The first opening 1211 communicates with the second cavity 112, and the second opening 1212 communicates with the first cavity 111. When the piston 2 slides toward the exterior of the buffer body 1, the oil in the second cavity 112 flows through the first opening 1211 and the second opening 1212 into the first cavity 111. The second flow channel includes a third opening and a fourth opening spaced apart. The third opening communicates with the first cavity 111, and the fourth opening communicates with the second cavity 112. When the piston 2 slides toward the interior of the buffer body 1, the oil in the first cavity 111 flows through the third opening and the fourth opening into the second cavity 112. The first flow channel 121 and the second flow channel are unidirectional flow channels. They can form independent door-opening and door-closing buffer channels, ensuring smoother oil flow and more stable buffering when the door is opened or closed.

[0037] See also Figure 2 and Figure 3 In another embodiment, the hidden hinge buffer 100 further includes a first baffle 51 and a second baffle 52. A driving channel 211 communicating with the main oil chamber 11 is provided within the driving portion 21. A first movable chamber 212 communicating with the driving channel 211 is provided on the side of the driving portion 21 facing the first chamber 111. A second movable chamber 213 communicating with the driving channel 211 is provided on the side of the driving portion 21 facing the second chamber 112. The first baffle 51 is movably disposed within the first movable chamber 212, and the second baffle 52 is movably disposed within the second movable chamber 213. The piston 2 slides toward the exterior of the buffer body 1, causing the driving channel 211 to communicate with the second opening 1212, and causing the first baffle 51 to open the first movable chamber 212 and the second baffle 52 to close the second movable chamber 213. The piston 2 slides toward the interior of the buffer body 1, connecting the drive channel 211 with the fourth opening, and causing the second baffle 52 to open the second active chamber 213 and the first baffle 51 to close the first active chamber 212. The arrangement of the first baffle 51 and the second baffle 52 allows the following to occur: when the door is opened, the first baffle 51 opens the first active chamber 212 and the second baffle 52 closes the second active chamber 213, allowing the oil in the first chamber 111 to flow into the first chamber 111 only from the first opening 1211, the second opening 1212, the drive channel 211, and the first active chamber 212; when the door is closed, the first baffle 51 closes the first active chamber 212 and the second baffle 52 opens the second active chamber 213, allowing the oil in the second chamber 112 to flow into the second chamber 112 only from the third opening, the fourth opening, the drive channel 211, and the second active chamber 213. This structure can enhance the one-way flow effect of the first and second channels.

[0038] See also Figure 3Based on the above embodiment, the drive channel 211 further includes a first intermediate channel 2111 extending in a first direction (i.e., transversely) and a second intermediate channel 2112 extending in a second direction (i.e., vertically) perpendicular to the first direction. The first intermediate channel 2111 and the second intermediate channel 2112 intersect and communicate with each other. The opposite ends of the first intermediate channel 2111 are respectively connected to the first active chamber 212 and the second active chamber 213. When the door is opened, the piston 2 slides to connect one end of the second intermediate channel 2112 with the second opening 1212; when the door is closed, the piston 2 slides to connect the other end of the second intermediate channel 2112 with the fourth opening.

[0039] The outer side of the driving part 21 is provided with a protruding first flange 214 and a second flange 215 spaced apart along the first direction. The first flange 214 abuts against the inner wall of the main oil chamber 11 to form a first cavity 111, and the second flange 215 abuts against the inner wall of the main oil chamber 11 to form a second cavity 112. The second intermediate channel 2112 is located between the first flange 214 and the second flange 215.

[0040] See also Figure 2 In one embodiment, the first opening 1211 includes a plurality of slots 12111 spaced apart along a first direction. The regulating valve 4 includes a first oil valve 41 that can be moved from the outside of the buffer body 1 into the first flow channel 121. The first oil valve 41 opens or closes the slots 12111 to adjust the amount of oil entering the first flow channel 121. The coordinated structure of the first oil valve 41 and the plurality of slots 12111 can simply and effectively adjust the amount of oil entering the first flow channel 121, thereby effectively adjusting the magnitude of the buffering force.

[0041] See also Figure 4 and Figure 5 In one embodiment of the second flow channel, the second flow channel includes a first branch 122 and a second branch 123 spaced apart. One end of each of the first and second branches 122, 123 communicates with the first cavity 111, while the other ends of each of the first and second branches 122, 123 are staggered along a first direction. The piston 2 slides, causing the oil in the first cavity 111 to flow into the second cavity 112 via the first branch 122 and / or the second branch 123. At different closing angles, one or both branches can be connected, enabling the adaptive provision of oil based on the required damping force for closing the door.

[0042] The regulating valve 4 also includes a second oil valve 42 and a third oil valve 43. The second oil valve 42 extends from the outside of the buffer body 1 into the first branch 122. A gap is defined between the second oil valve 42 and the inner wall of the first branch 122, allowing oil in the first branch 122 to flow into the second intermediate passage 2112 through this gap. The third oil valve 43 extends from the outside of the buffer body 1 into the second branch 123. A gap is defined between the third oil valve 43 and the inner wall of the second branch 123, allowing oil in the second branch 123 to flow into the second intermediate passage 2112 through this gap.

[0043] See also Figure 5 Furthermore, the second oil valve 42 has a first tapered end 421, which is inserted into the first branch 122. The second oil valve 42 can be moved to adjust the gap between the first tapered end 421 and the inner wall of the first branch 122. The tapered second oil valve 42 can simply and effectively adjust the amount of oil entering the first branch 122, thereby effectively adjusting the magnitude of the buffering force. The third oil valve 43 has a second tapered end 431, which is inserted into the second branch 123. The third oil valve 43 can be moved to adjust the gap between the second tapered end 431 and the inner wall of the second branch 123. The tapered third oil valve 43 can simply and effectively adjust the amount of oil entering the second branch 123, thereby effectively adjusting the magnitude of the buffering force.

[0044] In actual application, when the door is opened, the piston 2 slides toward the outside of the buffer body 13, the second baffle 52 closes the second active chamber 213, and the first baffle 51 opens the first active chamber 212. The space in the second cavity 112 is compressed, and the elastic member 3 is compressed by the blocking part 22. The flow path of the oil is: second cavity 112, first opening 1211, first flow channel 121, second opening 1212, second intermediate channel 2112, first intermediate channel 2111, first active chamber 212, and first cavity 111.

[0045] There are three stages of closure, please refer to Figure 4 , First stage: the door is opened at an angle of 90° to 60°, and the door is closed quickly (the oil pressure buffer force is small). The piston 2 slides toward the inside of the buffer body 13, and the first baffle 51 closes the first active chamber 212. The second baffle 52 opens the second active chamber 213. The space in the first cavity 111 is compressed. At this time, the elastic restoring force of the elastic member 3 is the largest. The oil flow path is: the first cavity 111, the first tributary 122, the gap between the first tributary 122 and the second oil valve 42, the second intermediate channel 2112, the first intermediate channel 2111, the second active chamber 213, and the second cavity 112.

[0046] See also Figure 5, second stage: the door opening angle is 60°~15°, the door closing speed slows down (the oil pressure buffer force gradually increases), the piston 2 continues to slide into the buffer body 13, the space in the first cavity 111 continues to be compressed, the first baffle 51 continues to close the first active cavity 212, and the second baffle 52 continues to open the second active cavity 213. At this time, the elastic recovery force of the elastic member 3 is medium, and the oil flow path is divided into two: the first cavity 111, the first tributary 122, the gap between the first tributary 122 and the second oil valve 42, the second intermediate channel 2112, the first intermediate channel 2111, the second active cavity 213, and the second cavity 112; and the first cavity 111, the second tributary 123, the gap between the second tributary 123 and the third oil valve 43, the second intermediate channel 2112, the first intermediate channel 2111, the second active cavity 213, and the second cavity 112.

[0047] See also Figure 6 , the third stage: the door is opened at an angle of 15° to 0°, and the door is closed slowly (the oil pressure buffer force gradually increases). The piston 2 slides further toward the inside of the buffer body 13, and the space in the first cavity 111 is further compressed. The first baffle 51 continues to close the first active cavity 212, and the second baffle 52 continues to open the second active cavity 213. At this time, the elastic recovery force of the elastic member 3 is the smallest. Since the ports of the first branch 122 and the second branch 123 are staggered along the first direction away from the first cavity 111, the flow path of the oil is: the first cavity 111, the second branch 123, the gap between the second branch 123 and the third oil valve 43, the second intermediate channel 2112, the first intermediate channel 2111, the second active cavity 213, and the second cavity 112.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications, substitutions, and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention should be determined by the claims.

Claims

1. A hidden hinge buffer, characterized in that: include: The buffer body has a main oil chamber and an oil passage connected thereto; a piston slidably disposed in the buffer body, and the piston has a driving portion, the driving portion is located in the main oil chamber and divides the main oil chamber into a first cavity and a second cavity; an elastic member disposed in the buffer body and connected to the piston, wherein the piston moves toward the outside of the buffer body to compress the elastic member, and under the elastic restoring force of the elastic member, the piston can return to the buffer body; and a regulating valve movably disposed on the buffer body and extending into the oil circuit, the regulating valve being capable of movably adjusting the amount of oil entering the oil circuit; the piston being capable of sliding toward the outside of the buffer body so that the oil in the second cavity flows into the first cavity through the oil circuit, and the piston being capable of sliding toward the inside of the buffer body so that the oil in the first cavity flows into the second cavity through the oil circuit; The oil passage includes a first flow passage and a second flow passage, the first flow passage includes a first opening and a second opening spaced apart from each other, the first opening communicates with the second cavity, and the second opening communicates with the first cavity, the piston slides toward the outside of the buffer body so that the oil in the second cavity flows into the first cavity through the first opening and the second opening; The second flow channel includes a third opening and a fourth opening spaced apart from each other, the third opening communicating with the first cavity, and the fourth opening communicating with the second cavity, the piston sliding toward the interior of the buffer body causing the oil in the first cavity to flow into the second cavity through the third opening and the fourth opening, and the first flow channel and the second flow channel are unidirectional flow channels; It also includes a first baffle and a second baffle, a driving flow channel connected to the main oil chamber is provided in the driving part, a first active chamber connected to the driving flow channel is provided on the side of the driving part facing the first chamber, and a second active chamber connected to the driving flow channel is provided on the side of the driving part facing the second chamber, the first baffle is movably provided in the first active chamber, and the second baffle is movably provided in the second active chamber, the piston slides toward the outside of the buffer body to connect the driving flow channel with the second opening, and the first baffle opens the first active chamber, and the second baffle closes the second active chamber; the piston slides toward the inside of the buffer body to connect the driving flow channel with the fourth opening, and the second baffle opens the second active chamber, and the first baffle closes the first active chamber.

2. The hidden hinge buffer according to claim 1, characterized in that: The buffer body includes a buffer main body and a buffer sleeve, the main oil chamber and the oil circuit are provided in the buffer main body, and the regulating valve is provided on the buffer main body; one end of the buffer sleeve is connected to the buffer main body, one end of the piston extends into the buffer sleeve, and a blocking portion is protruding from the end of the piston, the elastic member is sleeved on the piston, and the two ends of the elastic member are respectively in contact with the blocking portion and the inner wall of the buffer sleeve.

3. The hidden hinge buffer according to claim 1, characterized in that: The driving channel includes a first intermediate channel extending along a first direction and a second intermediate channel extending along a second direction perpendicular to the first direction. The first intermediate channel and the second intermediate channel are cross-connected, and the opposite ends of the first intermediate channel are respectively connected to the first active chamber and the second active chamber. The piston slides to connect one end of the second intermediate channel with the second opening, or to connect the other end of the second intermediate channel with the fourth opening.

4. The hidden hinge buffer according to claim 3, characterized in that: The outer side of the driving part is provided with a protruding first flange and a second flange at intervals. The first flange abuts against the inner wall of the main oil chamber to form the first cavity, and the second flange abuts against the inner wall of the main oil chamber to form the second cavity. The second intermediate channel is located between the first flange and the second flange.

5. The hidden hinge buffer according to claim 1, characterized in that: The first opening includes a plurality of spaced slots, and the regulating valve includes a first oil valve, which can be moved from the outside of the buffer body to extend into the first flow channel, and the first oil valve can be moved to open or close the slots to adjust the amount of oil entering the first flow channel.

6. The hidden hinge buffer according to claim 1, characterized in that: The second flow channel includes a first branch and a second branch separated by a gap, one port of the first branch and the second branch is connected to the first cavity, and the other ports of the first branch and the second branch are staggered along a first direction. The piston slides to cause the oil in the first cavity to flow into the second cavity through the first branch and / or the second branch.

7. The hidden hinge buffer according to claim 6, characterized in that: The regulating valve also includes a second oil valve and a third oil valve. The second oil valve moves from the outside of the buffer body to extend into the first branch, and there is a gap between the second oil valve and the inner wall of the first branch; the third oil valve moves from the outside of the buffer body to extend into the second branch, and there is a gap between the third oil valve and the inner wall of the second branch.

8. The hidden hinge buffer according to claim 7, characterized in that: The second oil valve has a first tapered end, the first tapered end is inserted into the first branch, and the second oil valve is capable of moving to adjust the gap between the first tapered end and the inner wall of the first branch; The third oil valve has a second tapered end, the second tapered end is inserted into the second branch, and the third oil valve can move to adjust the gap between the second tapered end and the inner wall of the second branch.

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