Multi-joint hinge

Abstract

The present invention relates to a multi-joint hinge and, more specifically, to a multi-joint hinge which is capable of maintaining a door in a closed state even when there is no driving unit such as a motor and softly opening the door. The present invention has the effects of widening a utilization space because the door is opened while being pushed back from a main body, and softly opening the door due to a multi-joint structure in which a plurality of links are engaged.

Description

Multi-joint hinge

[0001] The present invention relates to a multi-joint hinge, and more specifically, to a multi-joint hinge capable of maintaining a closed state of a door and enabling soft opening when the door is opened, even without a driving part such as a motor.

[0002] Generally, an oven (oven range) is a device that places food for cooking inside the cooking space, closes the door to seal the cooking space, and then heats and cooks the food.

[0003] When cooking, the oven is equipped with a water tank for steam operation, and this water tank is mainly provided in the upper space of the oven, and a display provided on the upper part of the oven becomes a door, and a water tank is provided on the upper part of the main body connected to the display by a hinge.

[0004] The water tank provided in this oven requires frequent insertion and removal to fill it with water, but there is a problem in that the space is narrow due to the hinge located between the bottom of the display and the main body, making it difficult to insert and remove the water tank.

[0005] In other words, the opening provided at the top of the main body to allow insertion and removal of the water tank is covered by the display even when the display is opened.

[0006] As such, since there is an overlapping area between the bottom of the display and the main body due to the hinge, there is little usable space even when the display is opened, and consequently, there is a problem in that conventional hinges are not easy to apply to home appliances with many spatial limitations.

[0007] In addition, to solve this problem, the space for inserting and removing the water tank must be made wider to maximize space utilization, which ultimately leads to the problem of the oven becoming larger overall.

[0008] Meanwhile, to solve this problem, a multi-link hinge is disclosed that is composed of multiple links so that when the door is opened from the main body, it is pushed downward and opens, thereby providing sufficient space.

[0009] However, in the case of such multi-link hinges, they are driven by a motor, so when the motor fails, it is very difficult to repair it, and since it is impossible to replace only the motor, there is a problem that the entire multi-link hinge must be replaced.

[0010] In other words, there are problems arising from the use of a motor as a driving unit for opening and closing the door, and there is a need for technology to solve this.

[0011] The present invention was devised to solve the above-mentioned problems, and aims to provide a multi-joint hinge that opens by pushing the door downward from the main body when the door is opened, thereby expanding the usable space.

[0012] And the purpose is to provide a multi-joint hinge that allows sufficient space to facilitate easy replacement of the water tank in an oven equipped with a water tank.

[0013] In addition, the purpose is to provide a multi-joint hinge that allows the door to be opened and closed smoothly and easily without the drive of a motor.

[0014] In addition, other objects and advantages of the present invention will be described below, and it should be noted that they will be encompassed to a broader extent by means and combinations within the scope that can be easily derived from the matters described in the claims of the present invention and the disclosure of the embodiments thereof.

[0015] The present invention for achieving the above objective comprises: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, comprising a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing; a damper provided and supported inside a damper case pivotally connected to the sub-link, which damps according to the rotation of the door; and a tension spring connected to the damper case and the housing, which enables stopping when the door rotates. The closed holding member comprises: a fixed member fixedly installed on the main link; a first guide member pivotally connected to the fixed member and having a compression spring between it and the fixed member; and a second guide member fixedly installed inside the housing corresponding to the first guide member; wherein the closed state of the door is maintained by the compression spring, and when the door rotates, soft opening or closing is possible by the damper, and when the force for the door operation disappears, the rotation of the door stops due to the tension of the tension spring and the weight of the door.

[0016] And according to a preferred embodiment of the present invention, the first guide member includes a first curve formed on one surface, and the second guide member includes a second curve formed on one surface facing the first guide member, and when the door is closed, the first and second curves come into contact to maintain the closed state, and when the door is opened, the first and second curves push against each other and the compression spring is tensioned so that the door opens.

[0017] In addition, according to a preferred embodiment of the present invention, the tension spring comprises a spring formed at the center and first and second locking portions formed extending from both sides of the spring, wherein the first locking portion engages with a protrusion provided on the upper part of the damper case and the second locking portion engages with a pivot provided on the other side of the upper part of the housing, and is characterized in that soft opening or closing is possible by compression of the damper when the door rotates.

[0018] And according to a preferred embodiment of the present invention, the damper case is connected to the housing, wherein one side is movably connected to a curved groove formed on both sides of the housing through a first rivet, and the other side is movably connected to an elongated groove formed on both sides of the housing through a second rivet, and the first rivet is provided to support one side of the damper.

[0019] In addition, according to a preferred embodiment of the present invention, the device further includes a switch that is fixedly installed in the housing and is provided on the damper case, and includes a button provided on the lower surface and connected to a control unit; and is characterized in that, due to a step difference on the upper surface of the damper case, the button is pressed when the door is closed and the pressing of the button is released when the door is opened.

[0020] And for achieving the above objective, the present invention comprises: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, comprising a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing; a case having one end pivotally connected to the sub-link and the other end connected to the housing, and movably connected via a rivet to an elongated groove formed on both sides of the housing; and a tension spring connected to the case and the housing, which enables stopping when the door rotates. The closed holding member comprises: a fixed member fixedly installed on the main link; a first guide member pivotally connected to the fixed member and having a compression spring between it and the fixed member; and a second guide member fixedly installed inside the housing corresponding to the first guide member; wherein the closed state of the door is maintained by the compression spring, and when the force for the door operation disappears during rotation of the door, the rotation of the door is stopped by the tension of the tension spring and the weight of the door.

[0021] In addition, the present invention for achieving the above objective comprises: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, comprising a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing; a damper provided and supported inside a damper case pivotally connected to the sub-link, which damps according to the rotation of the door; The closed holding member comprises a fixed member fixedly installed on the main link, a first guide member pivotally connected to the fixed member and having a compression spring between it and the fixed member, and a second guide member fixedly installed inside the housing corresponding to the first guide member; wherein the closed state of the door is maintained by the compression spring, and when the door rotates, soft opening or closing is possible by the damper.

[0022] And according to a preferred embodiment of the present invention, the first guide member includes a first curve formed on one surface, and the second guide member includes a second curve formed on one surface facing the first guide member, and when the door is closed, the first and second curves come into contact to maintain the closed state, and when the door is opened, the first and second curves push against each other and the compression spring is tensioned so that the door opens.

[0023] In addition, according to a preferred embodiment of the present invention, the device further comprises a switch that is fixedly installed in the housing and is provided on the case or damper case, and includes a button provided on the lower surface and connected to a control unit; wherein, due to a step difference on the upper surface of the case or damper case, the button is pressed when the door is closed and the pressing of the button is released when the door is opened.

[0024] As described above, according to the present invention, the following effects can be expected.

[0025] When the door is opened, it slides backward from the main body to open, expanding the usable space. This effectively ensures sufficient space to facilitate easy replacement of the water tank in ovens equipped with one.

[0026] In other words, as the door is pushed downward and opens, the overlapping area between the door and the main body is significantly reduced, and since the opening provided for water tank replacement is fully opened, the water tank does not hit the door when replacing the water tank.

[0027] In addition, due to the multi-joint structure with multiple links interlocked inside the housing, the door opens and closes smoothly. When the door opens and closes, the closed state is maintained by a compression spring, and the door can be softly opened by a tension spring and a damper.

[0028] In addition, when the door opens, the compression spring and guide member act to push in the direction of the door, allowing the door to open smoothly.

[0029] In addition, it should be noted that other effects of the present invention will be encompassed to a broader extent by the embodiments described above and the matters described in the claims of the present invention, as well as by effects that can be easily derived from them and potential advantages that contribute to industrial development.

[0030] FIGS. 1a to 1c are drawings showing the door closed state of a multi-joint hinge according to the first embodiment of the present invention.

[0031] FIGS. 2a and 2b are drawings showing the door opening state of a multi-joint hinge according to the first embodiment of the present invention.

[0032] FIGS. 3a and 3b are drawings showing a door of a multi-joint hinge in a more open state according to the first embodiment of the present invention.

[0033] FIGS. 4a and FIGS. 4b are drawings showing the door of a multi-joint hinge according to the first embodiment of the present invention in a fully open state.

[0034] FIGS. 5A and 5B are drawings illustrating the operation of a switch in the closed and open states of a door in a multi-joint hinge according to the first embodiment of the present invention.

[0035] FIG. 6 is a drawing showing a door of a multi-joint hinge according to a second embodiment of the present invention.

[0036] FIG. 7 is a drawing showing a door with a multi-joint hinge according to a third embodiment of the present invention.

[0037] <Explanation of Symbols>

[0038] 100, 200, 300; multi-joint hinge

[0039] 10; Housing

[0040] 11, 13; Home

[0041] 15; bracket

[0042] 20; cancer

[0043] 21; hinge axis

[0044] 23; Link axis

[0045] 30; Multi-joint link

[0046] 31; Main Link

[0047] 32; sublink

[0048] 33; Upper link

[0049] 34; Joint link

[0050] 40, 240; damper case

[0051] 41, 42; rivet

[0052] 45; protrusion

[0053] 50: Damper

[0054] 60; tension spring

[0055] 61, 62; stumbling block

[0056] 63; Spring

[0057] 70; closing retainer

[0058] 71, 72; guide member

[0059] 71a, 72a; curved part

[0060] 73; fixed member

[0061] 75; compression spring

[0062] 80; switch

[0063] 81; button

[0064] 82; connecting member

[0065] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to the description, the advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the attached drawings. Furthermore, it should be noted that the terms used in this specification are for describing the embodiments and are not intended to limit the present invention; that singular forms of such terms include plural forms unless specifically stated otherwise in the text, and that words indicating direction in the description are intended to aid in understanding the description and may change depending on the context.

[0066] A multi-joint hinge according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0067] Hereinafter, based on the drawing, the left side is referred to as the first side and the right side as the second side.

[0068] First embodiment

[0069] FIGS. 1a to 1c are drawings showing the door closed state of a multi-joint hinge according to the first embodiment of the present invention.

[0070] First, referring to FIGS. 1a to 1c, the multi-joint hinge (100) according to the present embodiment includes a housing (10), an arm (20), a multi-joint link (30), a damper (50), a tension spring (60), and a closing retaining part (70).

[0071] The housing (10) is installed in the main body of a device provided with a door, such as an oven provided with a display, and can be fixedly installed on both sides of the upper part of the main body of the oven.

[0072] That is, one lower side of the housing (10) is fixedly installed on the upper side of the main body, and the bracket (15) provided on the other side of the housing (10) is fixedly installed on a support provided between the door and the main body.

[0073] The housing (10) includes a curved groove (11) formed at the lower center corresponding to both sides and an elongated groove (13) formed at the other end corresponding to both sides, and a first rivet (41) described below is movably fitted through the housing (10) into the curved groove (11), and a second rivet (42) is movably fitted through the housing (10) into the elongated groove (13).

[0074] Next, the arm (20) is installed on the display, i.e., the door, and rotates together with the door when the door is opened or closed.

[0075] The arm (20) includes a hinge axis (21) and a link axis (23). Unlike conventional hinges, which are 1-axis hinges with a single hinge axis, the arm (20) of the multi-joint hinge (100) according to the present invention is characterized as being a multi-axis hinge that includes a hinge axis (21) and a link axis (23), and thus the door can be rotated while being pushed downward.

[0076] Next, the multi-joint link (30) is provided inside the housing (10) and is connected to the arm (20) so as to be rotatable, and includes a main link (31), a sub-link (32), an upper link (33), and a joint link (34).

[0077] The main link (31) is pivotally connected to the hinge axis (21) of the arm (20), with one end connected to the hinge axis (21) and the other end connected to one end of the sub-link (32), and each is rotatably connected through a rivet.

[0078] This main link (31) is shaped like a conical hat bent at a certain angle toward the top, and is connected to the joint link (34) below at this bent part.

[0079] Next, the sub-link (32) is pivotally connected to the main link (31) and the housing (10), with one end connected to the other end of the main link (31) and the other end connected to the lower part of the housing (10), and each is rotatably connected via a rivet.

[0080] And the sub-link (32) is connected to the damper case (40) that is lowered from the center, and as a result, when the arm (20) rotates due to the rotation of the door, the main link (31) connected to the arm (20) rotates, and the sub-link (32) connected to the main link (31) rotates, so that the damping operation of the damper (50) is performed, and the door can be softly opened.

[0081] Next, the upper link (33) is pivotally connected to the link shaft (23) of the arm (20), with one end connected to the link shaft (23) and the other end connected to one end of the joint link (34) below, and each is rotatably connected through a rivet.

[0082] These upper links (33) are rotated by the arm (20) and main link (31) and joint link (34) which rotate due to the opening and closing of the door.

[0083] Next, the joint link (34) is pivotally connected to the upper link (33) and the housing (10), with one end connected to the other end of the upper link (33) and the other end connected to the lower part of the housing (10), and the main link (31) is connected between the one end and the other end, and each is rotatably connected through a rivet.

[0084] At this time, for mutual connection and rotational driving between each link, the joint link (34) is provided on one side of the lower part of the housing (10), and the sub-link (32) is provided at the center of the lower part of the housing (10).

[0085] Next, the damper (50) is provided inside a damper case (40) pivotally connected to the sub-link (32) and is damped according to the rotation of the door.

[0086] The damper case (40) is pivotally connected to the center part of the sub-link (32).

[0087] And the damper case (40) is connected to the housing (10), and is connected to the housing (10) through a first rivet (41) at the lower end located at a predetermined distance from the end connected to the sub-link (32), more specifically at the other end, and is connected to the housing (10) through a second rivet (32) at the upper end of the other end, more specifically at the same line as the end connected to the sub-link (32).

[0088] That is, the damper case (40) has a side shape that is 'L'-shaped based on the drawing, and one lower side is concave at a predetermined interval so as not to rub against the sub-link (32) when the door rotates, and a damper (50) is inserted into the lower part.

[0089] One end of the damper case (40) is connected to the center of the sub-link (32) in the horizontal portion of the 'L' shape, and the other end is connected to the housing (10) through the second rivet (42), and one side of the vertical portion is connected to the housing (10) through the first rivet (41).

[0090] Here, the first rivet (41) is fitted into the curved groove (11) of the housing (10), and the first rivet (41) moves along the curved groove (11) as the door rotates.

[0091] The curved groove (11) is formed in a curved shape to correspond to the angle at which the damper case (40) rotates according to the rotation of the door.

[0092] The second rivet (42) is fitted into the elongated groove (13) of the housing (10), and the second rivet (42) moves along the elongated groove (13) as the door rotates.

[0093] The long groove (13) is formed in a long circular shape to correspond to the length of the damper case (40) as it moves according to the rotation of the door.

[0094] The damper (50) is supported inside the damper case (40), and one end of the damper (50) is supported by the first rivet (41).

[0095] That is, the first rivet (41) is provided on one side of the damper case (40) as described above, and is provided on one side of the vertical portion in the shape of an 'L', and is provided to support one end of the damper (50).

[0096] When the door rotates, the damper case (40) and damper (50) are moved by the rotation of the sub-link (32) connected to the damper case (40). At this time, the first rivet (41) moves curved through the curved groove (11), and the second rivet (42) moves linearly through the elongated groove (13).

[0097] Accordingly, due to the movement of the damper case (40), the damper (50) is compressed according to the movement of the first rivet (41), and damping is achieved.

[0098] Meanwhile, the damper (50) has fluid filled inside its body, and when the door is opened or closed, the linear movement of the damper case (40) causes one end of the damper (50) to be supported by the first rivet (41), and the resistance force of the fluid filled inside the body acts to result in damping, causing the door to open or close slowly.

[0099] Next, the tension spring (60) is connected to the damper case (40) and the housing (10) so that when the door is opened, the door stops at a specific position, that is, the door can be free-stopped.

[0100] This tension spring (60) consists of first and second locking parts (61, 62) provided on both sides and a spring (63) formed in the center.

[0101] That is, the tension spring (60) includes first and second locking portions (61, 62) that are formed extending to both sides from the spring (53) portion formed at the center.

[0102] The first catch (61) is caught on a protrusion (45) provided on the upper part of the damper case (40), and the second catch (62) is caught on a pivot provided on the other side of the upper part of the housing (10).

[0103] In this way, the second locking part (62) is engaged with a pivot fixedly installed in the housing (10), so when the damper case (40) moves due to the rotation of the door, the second locking part (62) is fixed to the housing (10) and the first locking part (61) moves together with the damper case (40), so that a tension force is gradually applied to the tension spring (60).

[0104] And the tension spring (60) is adjusted according to the weight of the door.

[0105] That is, by applying a tensioning force of the tension spring (60) corresponding to the weight of the door, the door can be free-stopped when the door rotates.

[0106] Next, the closing holding part (70) maintains the closed state of the door when the door is closed and functions to push the door open smoothly when the door is opened.

[0107] These closing retaining members (70) include first and second guide members (71, 72), a fixing member (73), and a compression spring (75).

[0108] The fixed member (73) is fixedly installed on the upper part of the main link (31) and is installed between the main link (31), the sub-link (32), and the joint link (34).

[0109] The fixed member (73) is pivotally connected to the first guide member (71), so that one side of the first guide member (71) is pivotally connected to one side of the fixed member (73).

[0110] A compression spring (75) is provided between the fixed member (73) and the first guide member (71).

[0111] The first guide member (71) includes a first curved portion (71a) formed on one surface.

[0112] That is, the first guide member (71) includes a first curved portion (71a) formed to be curved toward the top.

[0113] And the second guide member (72) is fixedly installed on the upper inner wall of the housing (10), and is installed at a position corresponding to the first guide member (71), for example, at a position corresponding to the first guide member (71) when the door is closed.

[0114] The second guide member (72) includes a second curved portion (72a) formed on one surface facing the first guide member (71), similar to the first guide member (71).

[0115] That is, the second guide member (72) includes a second curved portion (72a) formed in a curved shape toward the lower side, and the first curved portion (71a) and the second curved portion (72a) come into contact with each other when the door is closed.

[0116] As illustrated in FIG. 1c, in the closed state of the door, the first and second bends (71, 72) are in contact to maintain the closed state, and at this time, the first guide member (71) applies a pushing force toward the second guide member (72) by the compression spring (75), so that the closed state of the door can be easily maintained.

[0117] And as will be explained in detail below, when the door is opened, as shown in FIG. 2b below, when the first guide member (71) moves along the curved surface of the second guide member (72), the second guide member (72) functions to push the first guide member (71), so that the door opens smoothly.

[0118] Meanwhile, the multi-joint hinge (100) according to the present embodiment may further include a switch (80). FIGS. 5a and 5b are drawings showing the operation of the switch in the closed and open states of the door in the multi-joint hinge according to the first embodiment of the present invention.

[0119] Referring to the drawings, the switch (80) is fixedly installed in the housing (10) and is fixed to the other side of the housing (10) with rivets, and is fixedly installed with the housing (10) with rivets at the upper end and lower end of the switch (80) according to the drawings.

[0120] The switch (80) is provided with a button (81) on the lower surface, for example, on the lower surface.

[0121] The button (81) recognizes whether the door is open or closed through a pressing action, and is electrically connected to a control unit (not shown) and a connecting member (82). When it is determined that the door is open, if a set time has passed, it can generate a warning sound to inform the user that the door is open, or control the device, such as an oven, so that it does not operate.

[0122] For the operation of such a button (81), a switch (80) is provided on the damper case (40).

[0123] The damper case (40) is formed with a step at the other end as shown in the drawings, and in particular, the other end is formed with a lower height.

[0124] Due to the shape of the upper surface of the damper case (40), the button (81) of the switch (80) can be pressed or released.

[0125] That is, as shown in FIG. 5a, when the door is closed, the button (81) is pressed as indicated by F, and as shown in FIG. 5b, when the door is opened, the button (81) is released as indicated by F'.

[0126] The opening or closing of the door can be checked by pressing or releasing the button (81).

[0127] Hereinafter, with reference to FIGS. 2a and 2b, FIGS. 3a and 3b, and FIGS. 4a and 4b, the opening and closing operation of the multi-joint hinge (100) according to the present invention will be examined in more detail. FIGS. 2a and 2b are drawings showing the door open state of the multi-joint hinge according to the first embodiment of the present invention, FIGS. 3a and 3b are drawings showing the door of the multi-joint hinge according to the first embodiment of the present invention in a further open state, and FIGS. 4a and 4b are drawings showing the door of the multi-joint hinge according to the first embodiment of the present invention in a fully open state.

[0128] First, referring to FIG. 1a and FIG. 1c, the door is closed and the housing (10) and the arm (20) maintain an angle of 0 degrees.

[0129] At this time, the multi-joint link (30) is rotated as far as possible to the right, that is, to the other side, based on the drawing, and the damper case (40) is also located on the other side.

[0130] As a result, as indicated by A, the first rivet (41) is moved as far as possible to the other side from the curved groove (11), and as indicated by B, the second rivet (42) is moved as far as possible to the other side from the elongated groove (13).

[0131] And since the damper case (40) is located on the other side, the damper (50) provided inside is in a standby state where damping is not performed.

[0132] In addition, the tension spring (60) is in an initial state where it is not tensioned, and the compression spring (75) is in a compressed state because the first and second guide members (71, 72) are in contact as indicated by C.

[0133] Next, the user performs the action of opening the door.

[0134] First, in FIG. 2a and FIG. 2b, it is shown that while opening the door, the housing (10) and the arm (20) maintain an angle of about 30 degrees.

[0135] That is, when the door is opened, the arm (20) rotates as indicated by arrow D in FIG. 2a and FIG. 2b, the main link (31), joint link (34), and sub-link (32) rotate along the hinge axis (21) of the arm (20), and the upper link (33) and joint link (34) rotate along the link axis (23) of the arm (20).

[0136] At this time, the damper case (40) connected to the sub-link (32) is moved, and the first guide member (71) connected to the main link (31) is moved.

[0137] Due to the movement of the damper case (40), the first rivet (41) moves along the curved groove (11) as indicated by A, and the second rivet (42) moves along the elongated groove (13) as indicated by B. At this time, the damper case (40) also moves to one side, so the first rivet (41) compresses the internal damper (50), causing the door to open slowly.

[0138] And as the tension spring (60) moves according to the movement of the damper case (40), the first locking part (61) engaged with the protrusion (45) moves, and the tension spring (60) is tensioned as shown by arrow E.

[0139] Additionally, as illustrated in C, the first guide member (71) has a first bend (71a) that moves along the second bend (72a), and the second guide member (72) acts to push the first guide member (71).

[0140] At this time, if the force for opening the door disappears—that is, if the user stops the action of opening the door and the force for the door to operate is lost—the door comes to a free stop.

[0141] That is, due to the tension of the tension spring (60) according to the weight of the door, the door can be free-stopped.

[0142] Next, the door is opened further so that the housing (10) and the arm (20) maintain an angle of about 60 degrees, as shown in FIG. 3a and FIG. 3b.

[0143] As indicated by arrow D in FIG. 3a and FIG. 3b, the arm (20) is further rotated, and the main link (31), joint link (34), and sub-link (32) are rotated along the hinge axis (21) of the arm (20), and the upper link (33) and joint link (34) are rotated along the link axis (23) of the arm (20).

[0144] The damper case (40) connected to the sub-link (32) is moved, and as indicated by A, the first rivet (41) is provided at one end of the curved groove (11), and as indicated by B, the second rivet (42) is moved further along the elongated groove (13), and at this time, the damper case (40) is moved further to one side, so that the first rivet (41) causes the internal damper (50) to be further damped, so that the first rivet (41) compresses the internal damper (50) and causes the door to open slowly.

[0145] And the tension spring (60) is gradually tensioned as arrow E moves along with the movement of the damper case (40).

[0146] Additionally, the first guide member (71) is moved further so that interference from the second guide member (72) disappears, as illustrated in C.

[0147] At this time, the compression spring (75) is fully stretched.

[0148] Even in this state, if the user loses the force required to operate the door, the door stops free.

[0149] Next, the door is fully opened so that the housing (10) and the arm (20) maintain a 90-degree angle, as shown in FIGS. 4a and 4b, i.e., the door is fully open.

[0150] As indicated by arrow D in FIGS. 4a and 4b, the arm (20) is fully rotated, the main link (31), joint link (34), and sub-link (32) are fully rotated along the hinge axis (21) of the arm (20), and the upper link (33) and joint link (34) are fully rotated along the link axis (23) of the arm (20).

[0151] The damper case (40) connected to the sub-link (32) is moved to the maximum extent at one end, and as indicated by A, the first rivet (41) is moved to one end of the curved groove (11), and as indicated by B, the second rivet (42) is moved to one end of the elongated groove (13), and the damper (50) no longer operates.

[0152] And the tension spring (60) is also gradually tensioned as shown by arrow E.

[0153] In this way, the door is not only rotated through the hinge shaft (21), but also rotated by the link shaft (23), and at this time, due to the rotation through the link shaft (23), the arm (20) is pushed downward to the left relative to the drawing and rotates.

[0154] As a result, the door slides back from the main body to open, effectively expanding the usable space.

[0155] Meanwhile, in this embodiment, both the damper (50) and the tension spring (60) are provided, so that the door can be softly opened or closed through the damper (50) and the door can be free-stopped through the tension spring (60).

[0156] At this time, the user can solve the problem of the door not being soft-opened or closed by the tension spring (60) by adjusting the tension of the tension spring (60).

[0157] That is, because the door's free stop function by the tension spring (60) may cause a problem where the door's soft opening or closing through the damper (50) does not operate, the tension force of the tension spring (60) can be adjusted to solve this problem.

[0158] Alternatively, because the door's free stop through the tension spring (60) may not operate due to the soft opening or closing operation of the door by the damper (50), the tension force of the tension spring (60) may be adjusted to solve this problem.

[0159] The tension of the tension spring (60) can be adjusted by adjusting the tension of the spring (63) of the tension spring (60), and a description of the adjustment device for this purpose is omitted.

[0160] 2nd embodiment

[0161] FIG. 6 is a drawing showing a door of a multi-joint hinge according to a second embodiment of the present invention.

[0162] Looking at the multi-joint hinge (200) according to the second embodiment of the present invention, it is characterized by the absence of the first rivet (41) that supported the damper (50) and the damper (50) in the multi-joint hinge (100) according to the first embodiment described above.

[0163] In this embodiment, the description of the same configuration as the first embodiment described above is omitted.

[0164] Referring to FIG. 6, the multi-joint hinge (200) according to the present embodiment includes a housing (10), an arm (20), a multi-joint link (30), a case (240), a tension spring (60), and a closing retaining part (70).

[0165] The case (240) has a shape similar to the damper case (40) of the first embodiment described above, but does not have a damper (50) inside.

[0166] One end of the case (240) is pivotally connected to a sub-link (32), and the other end is connected to a housing (10), and is movably connected to an elongated groove (13) formed on both sides of the housing (10) via a rivet.

[0167] And the tension spring (60) is connected to the case (240) and the housing (10).

[0168] With this tension spring (60), the door can be free-stopped.

[0169] That is, when the door is rotated, if the user does not rotate the door, the door can be free-stopped by the tension of the tension spring (60) and the weight of the door.

[0170] In addition, the multi-joint hinge (200) according to the present embodiment may further include the aforementioned switch, and whether the door is opened or closed can be confirmed through the pressing or releasing of the button.

[0171] Third embodiment

[0172] FIG. 7 is a drawing showing a door of a multi-joint hinge according to a third embodiment of the present invention.

[0173] Looking at the multi-joint hinge (300) according to the third embodiment of the present invention, it is characterized by the absence of a tension spring (60) in the multi-joint hinge (100) according to the first embodiment described above.

[0174] In this embodiment, the description of the same configuration as the first embodiment described above is omitted.

[0175] Referring to FIG. 7, the multi-joint hinge (300) according to the present embodiment includes a housing (10), an arm (20), a multi-joint link (30), a damper case (40), a damper (50), and a closing holding part (70).

[0176] The damper (50) is provided inside a damper case (40) pivotally connected to the sub-link (32) and is damped according to the rotation of the door.

[0177] And the damper (50) is supported inside the damper case (40), and one end of the damper (50) is supported by the first rivet (41).

[0178] One end of the damper case (40) is pivotally connected to the center of the sub-link (32), and the other end is connected to the housing (10), which is fitted into the curved groove (11) of the housing (10) through the first rivet (41) and into the elongated groove (13) of the housing (10) through the second rivet (32).

[0179] When this damper case (40) moves according to the rotation of the door, the damper (50) is compressed according to the movement of the first rivet (41), and damping is achieved.

[0180] That is, when the door rotates, it can be softly opened or closed by the damper (50).

[0181] In addition, the multi-joint hinge (300) according to the present embodiment may further include the aforementioned switch, and whether the door is opened or closed can be confirmed through the pressing or releasing of the button.

[0182] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention. Furthermore, as described above, the embodiments disclosed in the present invention and the accompanying drawings are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments and accompanying drawings. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

A multi-joint hinge comprising: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, the multi-joint link including a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing. A damper provided and supported inside a damper case pivotally connected to the above sub-link, which damps according to the rotation of the door; A tension spring connected to the damper case and housing, enabling the door to stop when rotated; and A closing retaining member comprising: a fixing member fixedly installed on the main link; a first guide member pivotally connected to the fixing member and having a compression spring between it and the fixing member; and a second guide member fixedly installed inside the housing corresponding to the first guide member. The closed state of the door is maintained by the above compression spring, and When the above door rotates, soft opening or closing is possible by the above damper, and A multi-joint hinge characterized by the fact that when the force for the above door operation disappears, the rotation of the door stops due to the tension force of the tension spring and the weight of the door. In Article 1, The first guide member includes a first curved portion formed on one surface, and The second guide member includes a second curved portion formed on one surface facing the first guide member, and When the above door is closed, the first and second curved parts come into contact to maintain the closed state, and A multi-joint hinge characterized in that, when the door is opened, the first and second bends push each other and the compression spring is tensioned so that the door opens. In Article 1, The above tension spring is, It includes a spring formed at the center and first and second locking portions extending from both sides of the spring, wherein the first locking portion engages with a protrusion provided on the upper part of the damper case, and the second locking portion engages with a pivot provided on the other side of the upper part of the housing. A multi-joint hinge characterized by enabling soft opening or closing by compression of the damper when the door rotates. In Article 1, The above damper case is, It is connected to the above housing, wherein one side is movably connected to a curved groove formed on both sides of the housing via a first rivet, and the other side is movably connected to an elongated groove formed on both sides of the housing via a second rivet. A multi-joint hinge characterized in that the first rivet is provided to support one side of the damper. In Article 1, A switch that is fixedly installed in the above housing and is provided on the above damper case, and includes a button provided on the lower surface and connected to a control unit; further comprising A multi-joint hinge characterized by the fact that, due to the step difference on the upper surface of the damper case, the button is pressed when the door is closed, and the pressing of the button is released when the door is opened. A multi-joint hinge comprising: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, the multi-joint link including a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing. A case in which one end is pivotally connected to the above sub-link and the other end is connected to the above housing, and is movably connected via rivets to elongated grooves formed on both sides of the housing; A tension spring connected to the above case and housing, enabling the door to stop when rotated; and A closing retaining member comprising: a fixing member fixedly installed on the main link; a first guide member pivotally connected to the fixing member and having a compression spring between it and the fixing member; and a second guide member fixedly installed inside the housing corresponding to the first guide member. The closed state of the door is maintained by the above compression spring, and A multi-joint hinge characterized in that, when the force for the door operation disappears during the rotation of the door, the rotation of the door is stopped by the tension force of the tension spring and the weight of the door. A multi-joint hinge comprising: a housing installed on the main body of a mechanism provided with a door; an arm installed on the door; and a multi-joint link rotatably interconnected inside the housing, the multi-joint link including a main link pivotally connected to the hinge axis of the arm, a sub-link pivotally connected to the main link and the housing, an upper link pivotally connected to the link axis of the arm, and a joint link pivotally connected to the upper link and the housing. A damper that is provided and supported inside a damper case pivotally connected to the above sub-link, and damps according to the rotation of the door; A closing retaining member comprising: a fixing member fixedly installed on the main link; a first guide member pivotally connected to the fixing member and having a compression spring between it and the fixing member; and a second guide member fixedly installed inside the housing corresponding to the first guide member. The closed state of the door is maintained by the above compression spring, and A multi-joint hinge characterized by the ability to softly open or close by the damper when the door rotates. In Article 6 or Article 7, The first guide member includes a first curved portion formed on one surface, and The second guide member includes a second curved portion formed on one surface facing the first guide member, and When the above door is closed, the first and second curved parts come into contact to maintain the closed state, and A multi-joint hinge characterized in that, when the door is opened, the first and second bends push each other and the compression spring is tensioned so that the door opens. In Article 6 or Article 7, A switch that is fixedly installed in the above housing and is provided on the above case or damper case, and includes a button provided on the lower surface and connected to a control unit; further comprising A multi-joint hinge characterized by the fact that, due to a step difference on the upper surface of the case or damper case, the button is pressed when the door is closed, and the pressing of the button is released when the door is opened.

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