Bed

Abstract

A bed according to an aspect of the present invention comprises: a bed frame comprising a main frame and a sub-frame movable relative to the main frame; a main link rotatably connected to the main frame and the sub-frame; and a damper which is stretched or contracted by rotation of the main link to reduce a moving speed of the sub-frame when the sub-frame is moved and lowered, and which is stretched or contracted by rotation of the main link to reduce a moving speed of the sub-frame when the sub-frame is moved and lowered. The sub-frame can be in a first state in which the central portion of the sub-frame is disposed on the upper side of the main frame so as to overlap the main frame, or in a second state in which the central portion of the sub-frame is disposed further toward the front side than the first state, and the damper contracts when the sub-frame is in the first state. The damper contracts when the sub-frame is in the first state and stretches when the sub-frame is in the second state, or the damper contracts when the sub-frame is in the second state and stretches when the sub-frame is in the first state.

Description

Technical Field

[0001] This invention relates to a bed. Background Technology

[0002] Typically, beds are available as standard beds for users to lie on and foldable beds that can be converted into a foldable configuration. Foldable beds utilize leg supports that allow the user's legs to rotate or slide forward and backward.

[0003] In addition, massage devices promote blood circulation and improve metabolism by applying physical stimulation or pressure to the whole body or specific parts of the body. Furthermore, massage devices relieve muscle tension by applying pressure to muscles, thereby alleviating physical and mental fatigue and aiding in recovery, disease prevention, and beauty enhancement. Massage beds, which combine massage devices with a bed, are also available. These beds can massage the body of users who are lying down or sitting.

[0004] In this regard, Korean Patent Publication No. 10-2003-0087599 "Multifunctional Bed with Massage Device" (Patent Document 1) by applicant Jung Chan-in discloses a bed with a massage device that allows users to receive massage while lying down.

[0005] However, the multi-functional bed with a massage device in Patent Document 1 is constructed from a single frame, meaning the bed can only be in the unfolded state at all times. In other words, the multi-functional bed in Patent Document 1 remains unfolded regardless of whether the user uses the massage device. In this case, the multi-functional bed is always unfolded even when the user is not using the massage device, resulting in a significant space occupation problem.

[0006] In addition, in connection with the expandable bed, the Korean Patent Publication No. 10-1206967 of the applicant, Ceragem Co., Ltd., entitled "Sliding Thermotherapy Device" (Patent Document 2), discloses a thermotherapy device that provides therapeutic functions to the user, and a lower bed component that can slide relative to the main body to cover the thermotherapy device.

[0007] However, in the thermotherapy device of Patent Document 2, the lower bed component slides horizontally along the guide groove formed on the main body, resulting in friction during its movement. In other words, friction occurs between the lower bed component and the main body during the sliding process, potentially causing damage to the lower bed component. Summary of the Invention

[0008] The problem the invention aims to solve One embodiment of the present invention aims to provide a bed that can reduce damage to the sub-frames when the sub-frames constituting the bed frame move relative to the main frame.

[0009] means for solving problems According to one aspect of the invention, a bed includes: a bed frame comprising a main frame and a subframe movable relative to the main frame; a main link rotatably connected to the main frame and the subframe; and a damper that, when the subframe moves and descends, stretches or contracts by rotation of the main link to reduce the moving speed of the subframe. By rotating the main link, the subframe can be positioned in a first state, overlapping the main frame at its center and arranged above the main frame, or in a second state, positioned further forward than the first state, at its center. The damper contracts when the subframe is in the first state and stretches when the subframe is in the second state; or, the damper contracts when the subframe is in the second state and stretches when the subframe is in the first state.

[0010] Additionally, a plurality of dampers are provided, which may include: a first damper supported on the main frame so as to be compressed by the main connecting rod when the subframe is in the first state; and a second damper supported on the main frame at a position further forward than the first damper so as to be compressed by the main connecting rod when the subframe is in the second state. If the subframe rotates from the first state to the second state, the compression of the main connecting rod is released, causing the first damper to be stretched. If the subframe rotates from the second state to the first state, the compression of the main connecting rod is released, causing the second damper to be stretched.

[0011] Additionally, the damper may include: a first damper, supported on the main frame and stretched towards the front and upper side of the main frame.

[0012] Additionally, the damper may include a second damper, supported on the main frame and stretched upward and backward of the main frame.

[0013] Additionally, the main connecting rod may include: a first main connecting rod end, rotatably connected to the main frame; and a second main connecting rod end, rotatably connected to the sub-frame. When the sub-frame rotates, the main connecting rod rotates around the first main connecting rod end, which may be located between the first damper and the second damper.

[0014] Additionally, it may include a bracket that supports the main frame and applies pressure to the damper.

[0015] Additionally, a plurality of dampers are provided, which may include: a first damper that is supported on the main connecting rod in a direction perpendicular to the extension direction of the main connecting rod; and a second damper that is supported on the main connecting rod in a direction perpendicular to the extension direction of the main connecting rod and is stretched in the opposite direction to the first damper.

[0016] In addition, multiple supports are provided, and the main connecting rod may include: a first main connecting rod end, which is rotatably connected to the main frame; and a second main connecting rod end, which is rotatably connected to the sub-frame. When the sub-frame rotates, the main connecting rod rotates around the first main connecting rod end, and the first main connecting rod end is located between the multiple supports.

[0017] Additionally, the plurality of supports may include: a first support having a contact surface that contacts the first damper when the subframe is in a first state; and a second support disposed in front of the first support and having a contact surface that contacts the second damper when the subframe is in a second state, wherein the contact surface of the first support is inclined downward toward the front, and the contact surface of the second support is inclined upward toward the front.

[0018] Additionally, it may include: an elastic member, one end of which is connected to the main connecting rod and the other end of which is connected to the main frame, to apply elastic force to the main connecting rod.

[0019] Additionally, the main connecting rod may include: a lower main connecting rod portion rotatably connected to the main frame; an upper main connecting rod portion rotatably connected to the sub-frame; and a main connecting rod bend portion, wherein the main connecting rod bend portion is connected between the lower main connecting rod portion and the upper main connecting rod portion in a manner that offsets them from each other. The main connecting rod bend portion has a curved shape. When the sub-frame is in a second state, the main connecting rod bend portion is disposed on the upper part of the main frame. When the sub-frame is in a first state, the main connecting rod bend portion is disposed on the upper part of the main frame.

[0020] Furthermore, when the subframe is in the second state, the upper side of the lower main connecting rod is tilted forward so that the lower main connecting rod forms a predetermined first angle with the virtual line extending in the vertical direction. When the subframe is in the second state, the upper side of the upper main connecting rod is tilted forward so that the upper main connecting rod forms a second angle with the virtual line that is smaller than the first angle.

[0021] Invention Effects According to one aspect of the invention, when the subframe moves, the movement speed of the subframe can be reduced because the damper is stretched or contracted by the rotation of the main connecting rod, thereby reducing the impact applied to the subframe.

[0022] Additionally, the damper can be stretched when the subframe rises, so the subframe can easily move from the first state or the second state.

[0023] In addition, the elastic member can support the main link and the main frame and apply elastic force to the main link. Therefore, when the subframe descends, the movement speed of the subframe can be reduced.

[0024] In addition, when the subframe is in the first or second state, any one of the multiple dampers can be pressured by multiple supports, thereby reducing the rotational speed of the main connecting rod.

[0025] In addition, since the contact surface of each of the multiple supports can be formed at an angle, the multiple dampers can be compressed even if they are supported on the main connecting rod and rotate together with the main connecting rod. Attached Figure Description

[0026] Figure 1 This is a perspective view showing the subframe of the bed according to a first embodiment of the present invention in a first state.

[0027] Figure 2 yes Figure 1 A side view of the bed.

[0028] Figure 3 This is a perspective view showing the subframe of the bed according to a first embodiment of the present invention rotating to a first state or a second state.

[0029] Figure 4 yes Figure 3 A side view of the bed.

[0030] Figure 5 This is a perspective view showing the subframe of the bed according to a first embodiment of the present invention in a second state.

[0031] Figure 6 yes Figure 5 A side view of the bed.

[0032] Figure 7 This is a side view showing the subframe of the bed according to a second embodiment of the present invention in a first state.

[0033] Figure 8 This is a side view showing the case where the subframe of the bed according to a second embodiment of the present invention is rotated to a first state or a second state.

[0034] Figure 9This is a side view showing the subframe of the bed according to a second embodiment of the present invention in a second state. Detailed Implementation

[0035] The specific embodiments for implementing the technical concept of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] Furthermore, in describing the present invention, detailed descriptions of the relevant known technical components or functions will be omitted if it is believed that such detailed descriptions would obscure the essence of the present invention.

[0037] In addition, when it comes to a constituent element being "connected" or "combined" with another constituent element, it should be understood that it can be directly connected or combined with another constituent element, and there may be other constituent elements between the two.

[0038] The terminology used in this specification is for illustrative purposes only and is not intended to limit the invention. Unless the context clearly indicates otherwise, singular expressions include plural expressions.

[0039] Additionally, it should be noted in advance that the descriptions of the top, bottom, and sides in this specification are based on the figures shown in the accompanying drawings, and will differ depending on the orientation of the object. For the same reason, some components may be exaggerated, omitted, or shown in a simplified manner in the accompanying drawings, and the size of each component does not reflect the actual overall size.

[0040] Furthermore, terms including ordinal numbers such as first and second may be used to describe various constituent elements, but the corresponding constituent elements are not limited to these terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements.

[0041] The term "including" as used in this specification means to specify a particular feature, region, integer, step, action, element, and / or component, rather than excluding the presence or addition of other specific features, regions, integers, steps, actions, elements, components, and / or groups.

[0042] Hereinafter, the bed 1 according to the first embodiment of the present invention will be described.

[0043] Reference Figures 1 to 6 According to a first embodiment of the present invention, the bed 1 can be provided as a foldable bed that can be converted into a foldable state. The bed 1 may include: a body 100, a bed frame 200, a main link 300, a secondary link 400, an elastic member 500, and a damper 600.

[0044] The main body 100 can support the bed frame 200. The main body 100 may include: an upper mattress for the user to lie on; and a lower mattress for the user to place their legs. The main body 100 may be equipped with a massage module that can massage the user by applying pressure to parts of the user's body.

[0045] The bed frame 200 can support the upper and lower mattresses of the main body 100. Additionally, the bed frame 200 can support the massage module. Furthermore, the bed frame 200 may include a main frame 210 and a sub-frame 220.

[0046] The main frame 210 supports the upper part of the mattress of the body 100, which supports the upper body of the user. The main frame 210 is connected to the sub-frame 220 via a main link 300 and a secondary link 400. The first main link end 300a of the main link 300 and the first secondary link end 400a of the secondary link 400 are rotatably connected to the lower part of the main frame 210.

[0047] The subframe 220 can be configured to move relative to the main frame 210. For example, when the subframe 220 moves due to the rotation of the main link 300 and the secondary link 400, the subframe 220 can be in a first state or a second state. The first state can be a state in which the subframe 220 is configured on the upper side of the main frame 210 with its center overlapping the main frame 210. The second state can be a state in which the subframe 220 is configured with its center further forward than in the first state. These first and second states can be respectively named the overlapping state and the expanded state.

[0048] Re-reference Figures 3 to 6 The main connecting rod 300 allows the sub-frame 220 to be connected to the main frame 210 in a manner that enables relative movement. The main connecting rod 300 can also be rotatably connected to the main frame 210 and the sub-frame 220. In other words, the first main connecting rod end 300a of the main connecting rod 300 can be rotatably connected to the main frame 210, and the second main connecting rod end 300b of the main connecting rod 300 can be rotatably connected to the sub-frame 220. When the sub-frame 220 rotates, the main connecting rod 300 can rotate around the first main connecting rod end 300a. This main connecting rod 300 can be formed into a bent shape with a predetermined angle greater than a right angle and less than a straight angle. Multiple main connecting rods 300 can be provided, and these multiple main connecting rods 300 can be arranged on the left and right sides of the main frame 210. The main connecting rod 300 can include a lower main connecting rod portion 310, an upper main connecting rod portion 320, and a bent main connecting rod portion 330.

[0049] The lower main connecting rod portion 310 can be rotatably connected to the main frame 210. The end of this lower main connecting rod portion 310 can be a first main connecting rod end 300a rotatably connected to the main frame 210. The lower main connecting rod portion 310 and the upper main connecting rod portion 320 can extend in different directions from each other. The lower main connecting rod portion 310 can have a longer length than the upper main connecting rod portion 320, the lower secondary connecting rod portion 410 (described later), and the upper secondary connecting rod portion 420 (described later). The lower secondary connecting rod portion 410 can be connected to the upper secondary connecting rod portion 420 at a predetermined angle. For example, when the subframe 220 is in the second state, the lower main connecting rod portion 310 can be configured with its upper side tilted forward so that the lower main connecting rod portion 310 forms a predetermined first angle with a virtual line extending in the vertical direction.

[0050] The upper main connecting rod portion 320 can be rotatably connected to the sub-frame 220. The end of this upper main connecting rod portion 320 can be rotatably connected to the second main connecting rod end 300b of the sub-frame 220. The upper main connecting rod portion 320 and the lower main connecting rod portion 310 can extend in different directions. The upper main connecting rod portion 320 can be connected to the lower main connecting rod portion 310 at a predetermined angle greater than a right angle and less than a straight angle. When the sub-frame 220 is in the second state, the upper main connecting rod portion 320 can be configured to tilt its upper side forward, so that the upper main connecting rod portion 320 forms a second angle with the virtual line that is smaller than the first angle.

[0051] The main connecting rod bend 330 connects the lower main connecting rod portion 310 and the upper main connecting rod portion 320. The main connecting rod bend 330 can have a bent shape. The main connecting rod bend 330 can be bent and connected between the lower main connecting rod portion 310 and the upper main connecting rod portion 320 in a manner that offsets them from each other. When the subframe 220 is in the second state, the main connecting rod bend 330 can be disposed on the upper part of the main frame 210; when the subframe 220 is in the first state, the main connecting rod bend 330 can be disposed on the upper part of the main frame 210. The main connecting rod bend 330 is shown in the accompanying drawings according to this embodiment, but the main connecting rod bend 330 can also be omitted. In other words, the lower main connecting rod portion 310 and the upper main connecting rod portion 320 can also be directly connected by forming an angle.

[0052] The secondary link 400 allows the subframe 220 to be connected to the main frame 210 in a manner that enables relative movement. Furthermore, the secondary link 400 can be rotatably connected to the main frame 210 and the subframe 220, positioned in front of the main link 300. The first secondary link end 400a of this secondary link 400 can be rotatably connected to the main frame 210, and the second secondary link end 400b can be rotatably connected to the subframe 220. When the subframe 220 rotates, the secondary link 400 can rotate about the first secondary link end 400a. The bend in the secondary link 400 can be formed at a predetermined angle greater than a right angle and less than a flat angle. Multiple secondary links 400 can be provided, and these multiple secondary links 400 can be arranged on the left and right sides of the main frame 210. The secondary link 400 may include a lower secondary link portion 410, a secondary link bent portion 430, and an upper secondary link portion 420.

[0053] The lower sub-link portion 410 can be rotatably connected to the main frame 210. The lower sub-link portion 410 and the upper sub-link portion 420 can extend in different directions. The lower sub-link portion 410 can be connected to the upper sub-link portion 420 at a predetermined angle. For example, the lower sub-link portion 410 can be connected to the upper sub-link portion 420 in the front-rear direction via a sub-link bend 430, such that the angle formed with the upper sub-link portion 420 is less than a straight angle and greater than a right angle. When the sub-frame 220 is in the second state, the lower sub-link portion 410 can extend forward. When the sub-frame 220 is in the second state, the lower sub-link portion 410 can be configured to tilt its upper side forward, so that the lower sub-link portion 410 forms a third angle with a virtual line extending in the vertical direction, the third angle being smaller than the first angle and the second angle.

[0054] The upper sub-link portion 420 can be rotatably connected to the sub-frame 22. The upper sub-link portion 420 and the lower sub-link portion 410 can extend in different directions. The upper sub-link portion 420 can be connected to the lower sub-link portion 410 through a sub-link bend portion 430 to form an angle that is less than a straight angle and greater than a right angle. When the sub-frame 220 is in the second state, the upper sub-link portion 420 can be arranged parallel to the horizontal direction.

[0055] The secondary connecting rod bend 430 can have a shape formed by bending a curved shape with curvature. The secondary connecting rod bend 430 can connect the lower secondary connecting rod portion 410 and the upper secondary connecting rod portion 420 by bending. When the subframe 220 is in the second state, the secondary connecting rod bend 430 can be disposed on the upper part of the main frame 210, and when the subframe 220 is in the first state, the secondary connecting rod bend 430 can be disposed on the lower part of the main frame 210. Although the secondary connecting rod bend 430 is shown in the accompanying drawings according to this embodiment, the secondary connecting rod bend 430 can also be omitted. In other words, the lower secondary connecting rod portion 410 and the upper secondary connecting rod portion 420 can also be directly connected by forming an edge.

[0056] The elastic member 500 is connected to the main link 300 and the main frame 210, thereby applying a spring force to the main link 300. The elastic member 500 can rotate by rotating the sub-frame 220. When the sub-frame 220 rotates and rises or falls, this elastic member 500 can apply a spring force in the direction of rising of the sub-frame 220. One end of the elastic member 500 is rotatably connected to the main link 300, and the other end is rotatably connected to the main frame 210, and can be configured such that one end is positioned above the other end. The elastic member 500 can rotate around one end by rotating the sub-frame 220. The rotation center of the elastic member 500 can be positioned above the rotation center of the main link 300 and the rotation center of the secondary link 400.

[0057] A damper 600 is disposed on the main frame 210 and can be stretched or contracted by the rotation of the main connecting rod 300 when the subframe 220 moves to descend, thereby reducing the moving speed of the subframe 220. The damper 600 may be disposed on the underside of the main frame 210. The damper 600 may be configured to be contracted when the subframe 220 is in a first state and stretched when the subframe 220 is in a second state, or to be contracted when the subframe 220 is in a second state and stretched when the subframe 220 is in a first state. Multiple dampers 600 may be provided. Multiple dampers 600 may include a first damper 610 and a second damper 620.

[0058] The first damper 610 can be supported on the main frame 210 and can be compressed by the main connecting rod 300 when the subframe 220 is in the first state. Furthermore, if the subframe 220 rotates from the first state to the second state, the compression of the main connecting rod 300 can be released, thereby stretching the first damper 610. This first damper 610 can be supported on the main frame 210, thereby allowing it to be stretched towards the front and upper side of the main frame 210. In other words, the first damper 610 can be tilted with its front end positioned above its rear end.

[0059] The second damper 620 can be supported on the main frame 210 in front of the first damper 610. When the subframe 220 is in the second state, it can be compressed by the main connecting rod 300. A first main connecting rod end 300a of the main connecting rod 300 can be disposed between the second damper 620 and the first damper 610. Furthermore, if the subframe 220 rotates from the second state to the first state, the compression of the main connecting rod 300 can be released, thereby stretching the second damper 620. This second damper 620 can be supported on the main frame 210, thereby stretching upwards and backwards from the main frame 210. In other words, the second damper 620 can be tilted and supported on the main frame 210 with its rear end positioned above its front end.

[0060] The function and effects of the first embodiment of the present invention will be described below.

[0061] According to the first embodiment of the present invention, the damper 600 of the bed 1 is stretched or contracted by the rotation of the main connecting rod 300 when the sub-frame 220 moves and descends, thereby reducing the moving speed of the sub-frame 220. Therefore, the impact applied to the sub-frame 220 can be reduced when the sub-frame 220 is in the first state or the second state.

[0062] Additionally, when the subframe 220 rises, the damper 600 can be stretched, so the subframe 220 can be easily moved from the first state or the second state.

[0063] In addition, since the elastic member 500 is supported by the main link 300 and the main frame 210 and applies elastic force to the main link 300, the elastic member 500 can reduce the moving speed of the sub-frame 220 when the sub-frame 220 descends.

[0064] The following is for reference Figures 7 to 9 The bed 1 according to the second embodiment of the present invention will be described. In the process of describing the second embodiment, there is a difference that the damper 600 is supported by the main connecting rod 300 and also has a bracket 700, so the description will focus on this difference.

[0065] The first damper 610 can be supported on the main connecting rod 300 in a stretching direction perpendicular to the extending direction of the main connecting rod 300, and rotates together with the main connecting rod 300. In other words, the first damper 610 can be supported on the lower end of the main connecting rod portion 310. When the subframe 220 is in the first state, this first damper 610 can be tilted with its front side below the rear side. In addition, when the subframe 220 is in the second state, the front side of the first damper 610 can be above the rear side.

[0066] The second damper 620 can be supported on the main connecting rod 300 in a direction perpendicular to the extension direction of the main connecting rod 300, and rotate together with the main connecting rod 300. In other words, the first damper 610 can be supported on the lower end of the main connecting rod 310. Furthermore, the second damper 620 can be configured to be stretched in the opposite direction to the first damper 610. When the subframe 220 is in the second state, this second damper 620 can be tilted with its front side below the rear side. Additionally, when the subframe 220 is in the first state, the front side of the second damper 620 can be above the rear side.

[0067] The bracket 700 can apply pressure to multiple dampers 600. Multiple such brackets 700 can be formed, spaced apart from each other in the front-rear direction and supported on the main frame 210. A first main link end 300a of a main link 300 can be provided between the multiple brackets 700. The multiple brackets 700 may include a first bracket 710 and a second bracket 720.

[0068] When the subframe 220 is in the first state, the first support 710 can apply pressure to the first damper 610. Through this pressure from the first support 710, when the subframe 220 rotates to the first state, the first damper 610 can retract while contacting the first support 710. The contact surface of the first support 710 can be configured to slope forward and downward in a manner that allows it to contact the first damper 610. The contact surface of the first support 710 is formed to be larger than the front surface of the first damper 610, thereby allowing it to contact the front surface of the first damper 610. Furthermore, when the subframe 220 is in the second state, the first support 710 can be separated from the first damper 610.

[0069] When the subframe 220 is in the second state, the second support 720 can apply pressure to the second damper 620. Through this pressure from the second support 720, the second damper 620 can retract while contacting the second support 720 as the subframe 220 rotates to the second state. The contact surface of the first support 710 can be configured to slope forward and downward in a manner that contacts the second damper 620. The contact surface of the second support 720 is formed to be larger than the rear surface of the second damper 620, thereby allowing it to contact the rear surface of the second damper 620. Furthermore, when the subframe 220 is in the first state, the second support 720 can be spaced apart from the second damper 620.

[0070] The function and effects of bed 1 according to the second embodiment of the present invention will be described below.

[0071] According to the second embodiment of the bed 1 of the present invention, when the subframe 220 is in the first state or the second state, any one of the plurality of dampers 600 can be pressed by the plurality of supports 700, thereby reducing the rotational speed of the main connecting rod 300.

[0072] In addition, the contact surface of each of the multiple supports 700 can be formed at an angle, so that even if the multiple dampers 600 are supported on the main link 300 and rotate together with the main link 300, the multiple dampers 600 can be compressed.

[0073] Although embodiments of the invention have been described with reference to specific implementations, these are merely examples, and the invention is not limited thereto and should be understood to have the widest scope following the technical spirit disclosed herein. Those skilled in the art can implement patterns of unspecified shapes by combining / substituting the disclosed embodiments, without departing from the scope of the invention. Furthermore, those skilled in the art can readily modify or alter the embodiments disclosed herein, and such modifications or alterations also clearly fall within the scope of the invention.

Claims

1. A bed, characterized in that, including: a bed frame including a main frame and a sub-frame movable with respect to the main frame, a main link rotatably connected to the main frame and the sub-frame, and a damper stretched or contracted by rotation of the main link to reduce a moving speed of the sub-frame when the sub-frame moves and descends; the sub-frame is able to be in a first state in which a central portion of the sub-frame is disposed on an upper side of the main frame in an overlapping manner or a second state in which the central portion of the sub-frame is disposed more forward than the first state by rotation of the main link, the damper is contracted when the sub-frame is in the first state and stretched when the sub-frame is in the second state, or the damper is contracted when the sub-frame is in the second state and stretched when the sub-frame is in the first state.

2. The bed according to claim 1, wherein the damper is provided in plural, the damper includes: a first damper supported to the main frame to be stretched by the main link when the sub-frame is in the first state, and a second damper supported to the main frame at a position more forward than the first damper to be stretched by the main link when the sub-frame is in the second state; if the sub-frame is rotated from the first state to the second state, the stretching by the main link is released so that the first damper is stretched, if the sub-frame is rotated from the second state to the first state, the stretching by the main link is released so that the second damper is stretched.

3. The bed according to claim 1, wherein the damper includes: a first damper supported to the main frame and stretched to a front upper side of the main frame.

4. The bed according to claim 1, wherein the damper includes: a second damper supported to the main frame and stretched to a rear upper side of the main frame.

5. The bed according to claim 2, wherein the main link includes: a first main link end rotatably connected to the main frame, and a second main link end rotatably connected to the sub-frame; the main link is rotated with the first main link end as a center when the sub-frame is rotated, the first main link end is positioned between the first damper and the second damper.

6. The bed of claim 1, wherein, further including: a bracket supported to the main frame and pressing the damper.

7. The bed according to claim 6, wherein the damper is provided in plural, the plural dampers include: a first damper supported to the main link so as to be stretched in a direction perpendicular to an extending direction of the main link, and a second damper supported to the main link so as to be stretched in a direction perpendicular to the extending direction of the main link and stretched to a direction opposite to the first damper.

8. The bed according to claim 7, wherein the bracket is provided in plural, the main link includes: a first main link end portion rotatably connected to the main frame, and a second main link end portion rotatably connected to the sub frame; when the sub frame rotates, the main link rotates about the first main link end portion, the first main link end portion is positioned between the plurality of supports.

9. The bed according to claim 8, wherein the plurality of supports include: a first support formed with a contact surface that contacts the first damper when the sub frame is in the first state, and a second support disposed in front of the first support and formed with a contact surface that contacts the second damper when the sub frame is in the second state; the contact surface of the first support is inclined downward toward the front, the contact surface of the second support is inclined upward toward the front.

10. The bed of claim 1, wherein, Further comprising: a resilient member having one end coupled to the main link and the other end coupled to the main frame to apply an elastic force to the main link.

11. The bed according to claim 1, wherein the main link includes: a lower end main link portion rotatably connected to the main frame, an upper end main link portion rotatably connected to the sub frame, and a main link bent portion connected between the lower end main link portion and the upper end main link portion in a manner that the lower end main link portion and the upper end main link portion are offset from each other, the main link bent portion has a curved shape, when the sub frame is in the second state, the main link bent portion is disposed at an upper portion of the main frame, when the sub frame is in the first state, the main link bent portion is disposed at the upper portion of the main frame.

12. The bed according to claim 11, wherein when the sub frame is in the second state, an upper side of the lower end main link portion is inclined toward the front to form a predetermined first angle with a virtual line extending in the vertical direction, when the sub frame is in the second state, an upper side of the upper end main link portion is inclined toward the front to form a second angle smaller than the first angle with the virtual line.

Images