Electric bed and drive mechanism therefor

Abstract

The utility model belongs to the technical field of electric bed, concretely relates to an electric bed and drive mechanism thereof, and the electric bed comprises: bed frame body, including the lower bed frame and upper bed frame that are oppositely arranged and slide in cooperation, drive mechanism, including motor and electric push rod, the motor is arranged on the lower bed frame, the electric push rod is transmission connection with the back plate on the upper bed frame, wherein when the motor drive electric push rod elongation, the electric push rod pushes the back plate and overturns upwards relative to the upper bed frame, and the whole upper bed frame is driven synchronously and is translated relative to the lower bed frame towards the direction of bed head.

Description

Technical Field

[0001] This utility model belongs to the field of electric bed technology, and in particular relates to an electric bed and its drive mechanism. Background Technology

[0002] As people's demands for home comfort increase, electric beds are becoming increasingly popular due to their adjustable backrest angles. Users expect to be able to adjust the backrest for different scenarios such as reading and watching movies, thus achieving a better comfort experience. Currently, most electric beds on the market use adjustment methods that borrow from earlier technologies: the backrest section of the bed board typically rotates and rises around a hinge point fixed to the bed frame. While this structure achieves basic backrest angle adjustments, it has shortcomings in terms of comfort and safety in actual use.

[0003] Specifically, when the backrest is raised around the fixed point, the user's body is not smoothly supported; instead, the upper body is pushed upwards while the lower body tends to slide towards the foot of the bed. This creates significant shearing forces between the user's back, hips, and the mattress. This not only affects comfort but also makes it relatively difficult for frail individuals or those in recovery to overcome these shearing forces, increasing the risk of skin friction damage, especially for those who need to lie down for extended periods.

[0004] Therefore, how to improve the structure of existing household electric beds so that the backrest lifting movement can effectively avoid the generation of shear force, thereby improving comfort, is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one electric bed and its drive mechanism.

[0007] In a first aspect, the present disclosure provides an electric bed, including: a bed frame body, including a lower bed frame and an upper bed frame that are disposed opposite to each other and slidably engaged; The drive mechanism includes a motor and an electric push rod; the motor is mounted on the lower bed frame, and the electric push rod is connected to the back plate on the upper bed frame. When the electric motor drives the electric push rod to extend, the electric push rod pushes the back panel to flip upward relative to the upper bed frame, and simultaneously drives the entire upper bed frame to move horizontally relative to the lower bed frame towards the head of the bed.

[0008] In one alternative implementation, the upper bed frame slides relative to the lower bed frame through the cooperation of a sliding mechanism and a guiding mechanism.

[0009] In one optional embodiment, the guiding mechanism includes guide rails symmetrically arranged on both sides of the lower bed frame, and the sliding mechanism includes rollers symmetrically arranged on both sides of the upper bed frame. The rollers roll along the extension direction of the guide rail to drive the entire upper bed frame to translate relative to the lower bed frame toward the headboard.

[0010] In one optional embodiment, the lower bed frame is provided with a crossbar, and the back plate is provided with a hinge seat; The motor is hinged to the middle of the crossbar via a hinge shaft, and the end of the electric push rod is hinged to the hinge seat via a hinge shaft.

[0011] In one alternative embodiment, the upper bed frame further includes a footboard, a legboard, and a buttocks board that are hinged in sequence, wherein the buttocks board is hinged to the backboard. When the electric push rod extends, it pushes the back panel to flip upward relative to the upper bed frame.

[0012] In one alternative embodiment, a pair of mounting seats are symmetrically arranged on the lower end face of the back plate, and the mounting seats are hinged to the lower bed frame via a pair of support rods.

[0013] In one alternative embodiment, the motor has a self-locking function, and the back plate remains stationary relative to the lower bed frame when the electric push rod stops.

[0014] Secondly, embodiments of this disclosure also provide a drive mechanism for an electric bed, including: a motor hinged to the lower frame of the electric bed; An electric actuator, the end of which is hinged to the back panel of the upper bed frame of the electric bed; A guide mechanism is provided on both sides of the lower bed frame; A sliding mechanism is provided on both sides of the upper bed frame, and the position of the sliding mechanism corresponds to the guide mechanism; When the electric push rod is extended by the motor, the electric push rod pushes the back plate to flip upward relative to the upper bed frame, and through the cooperation of the sliding mechanism and the guide mechanism, it synchronously drives the entire upper bed frame to move horizontally relative to the lower bed frame towards the head of the bed.

[0015] In one optional embodiment, the guiding mechanism includes guide rails symmetrically arranged on both sides of the lower bed frame, and the sliding mechanism includes rollers symmetrically arranged on both sides of the upper bed frame. The rollers roll along the extension direction of the guide rail to drive the entire upper bed frame to translate relative to the lower bed frame toward the headboard.

[0016] In one optional embodiment, the lower bed frame is provided with a support rod, and the back plate is provided with a hinge seat; The motor is hinged to the middle of the support rod via a hinge shaft, and the end of the electric push rod is hinged to the hinge seat via a hinge shaft.

[0017] The beneficial effect of this utility model is that the electric bed drives the backrest to rise through an electric push rod, and simultaneously moves the entire upper bed frame towards the head of the bed. This ensures that there is no relative sliding between the user's body and the mattress during the process of changing from a lying to a sitting position, eliminating the shearing force present in traditional electric beds and thus avoiding the risk of skin damage due to friction.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 The backrest of an electric bed provided in this embodiment of the present disclosure is in a non-lifted state. Figure 1 ; Figure 2 The backrest of an electric bed provided in this embodiment of the present disclosure is in a non-lifted state. Figure 2 ; Figure 3 This is a perspective view of the backrest of an electric bed in a raised state, as provided in an embodiment of this disclosure.

[0022] In the picture: 100. Bed frame body; 110. Lower bed frame; 111. Guide mechanism; 112. Guide rail; 113. Crossbar; 120. Upper bed frame; 121. Backrest panel; 1211. Hinge seat; 1222. Mounting base; 122. Hip panel; 123. Leg panel; 124. Foot panel; 125. Sliding mechanism; 126. Roller; 200. Drive mechanism; 210. Motor; 220. Electric push rod; 300. Support rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has revealed shortcomings in existing technology: Currently, most commercially available electric beds for home use rely on earlier technologies for adjustment. The backrest section of the bed board typically rotates and rises around a hinge point fixed to the bed frame. While this structure allows for basic backrest angle adjustments, it presents challenges in comfort and safety during actual use. When the backrest rises around the fixed point, the user's body is not smoothly supported; instead, the upper body is pushed upwards, while the lower body tends to slide towards the foot of the bed. This creates significant shearing forces between the user's back, buttocks, and the mattress. This not only affects comfort but also makes it difficult for frail individuals or those in recovery to overcome these shearing forces, increasing the risk of skin abrasion and injury, especially for those who need to lie down for extended periods.

[0030] Based on the above research, this disclosure provides an electric bed that uses a drive device (such as an electric push rod) to flip the back panel and simultaneously forcefully move the entire upper bed frame towards the head of the bed, thereby eliminating shearing force.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] See Figure 2 and Figure 3This disclosure provides an electric bed, including a bed frame body 100, which includes a lower bed frame 110 and an upper bed frame 120 that are arranged opposite to each other and can slide relative to each other. The lower bed frame 110 is the static base frame of the entire structure, usually fixed to the ground or bed legs. The upper bed frame 120 is the moving part that directly supports the mattress and the user. It slides with the guide mechanism 111 of the lower bed frame 110 through a sliding mechanism 125. The drive mechanism 200 is the core that provides power, and it includes a motor 210 and an electric push rod 220. The motor 210 is fixedly mounted on the lower bed frame 110. The electric push rod 220 is the actuator for power transmission. One end of it is connected to the output shaft of the motor 210, and the other end is connected to the backrest plate 121 of the upper bed frame 120. When the user needs to raise the back, the motor 210 is activated, causing it to drive the electric push rod 220 to extend. The extended electric actuator 220 pushes the back plate 121, causing it to flip upwards about its hinge point with the hip plate 122 (as shown). Figure 3 (As indicated by the middle arrow F2). Simultaneously, since the bottom end of the electric push rod 220 is hinged to the fixed lower bed frame 110, the reaction force of its pushing against the backrest 121 is transformed into a force driving the entire upper bed frame 120 through the overall structure of the upper bed frame 120. Under the action of this force, the sliding mechanism 125 of the upper bed frame 120 slides along the guide mechanism 111 of the lower bed frame 110, thereby synchronously driving the entire upper bed frame 120, along with the user's body on it, to translate relative to the lower bed frame 110 towards the head of the bed (e.g., ...). Figure 3 (In the direction indicated by the middle arrow F1). Through the above-mentioned "flipping + translation" linkage design, this electric bed ensures that there is almost no relative sliding between the user's torso and the mattress when the user changes from a lying to a sitting position. This eliminates the harmful shearing forces generated by traditional structures, improves user comfort, and effectively avoids the risk of skin damage caused by friction.

[0035] See Figure 2In some embodiments, the lower bed frame 110 is symmetrically provided with guide mechanisms 111 on its left and right sides. Each guide mechanism 111 mainly includes a guide rail 112 extending along the length of the bed (i.e., from the head to the foot of the bed). Corresponding to the guide mechanisms 111, the upper bed frame 120 is symmetrically provided with sliding mechanisms 125 on its left and right sides. Specifically, the sliding mechanism 125 includes rollers 126 rotatably mounted on the side of the upper bed frame 120. The groove shape of the rollers 126 matches the cross-sectional shape of the guide rails 112, so that the rollers 126 can fit into the guide rails 112. The upper bed frame 120 is directly supported and rested on the guide rails 112 on both sides of the lower bed frame 110 by the rollers 126 on both sides. When the drive mechanism 200 is working, the electric push rod 220 pushes the back panel 121 to flip, and the resulting horizontal component force is transmitted to the rollers 126 through the frame of the upper bed frame 120. Under this force, the roller 126 rolls along the extension direction of the guide rail 112. Since the guide rail 112 is fixed, the rolling of the roller 126 is converted into linear motion of the entire upper bed frame 120 (including all components such as the backrest 121 and buttocks board 122) relative to the stationary lower bed frame 110. Figure 3 The movement indicated by arrow F1 is in the direction of the head of the bed, thus achieving the linkage between "lifting the back" and "translating".

[0036] See Figure 2 and Figure 3 In some embodiments, a crossbar 113 is provided on the lower bed frame 110. This crossbar 113 is typically a rigid, transversely arranged bar, with both ends fixed to the sides of the lower bed frame 110 by welding, bolting, or other methods. A hinge seat 1211 is provided on the back plate 121 of the upper bed frame 120. This hinge seat 1211 is typically a block-shaped component fixed to the back of the back plate 121, with through holes for connecting to the output end of the drive mechanism 200. The motor 210 is hinged to the middle of the crossbar 113 via a hinge shaft (not shown). This "middle hinge" installation method allows the motor 210 and its driven electric push rod 220 to swing freely within a certain angle range around the hinge shaft, thereby adapting to the constantly changing angle of the push rod during extension and retraction, and avoiding structural interference.

[0037] See Figure 1 In some embodiments, the upper bed frame 120 includes a backrest 121, a hiprest 122, a legrest 123, and a footrest 124 that are hinged sequentially from head to foot. The boards are connected by hinges, allowing the backrest 121 and legrest 123 to be angled relative to the hiprest 122.

[0038] See Figure 3In some embodiments, a pair of mounting seats 1222 are symmetrically arranged on the lower end face of the back panel 121. These mounting seats 1222 are typically lugs fixedly connected to the surface of the back panel 121, each having a coaxial hinge hole, forming a stable hinge fulcrum. Corresponding to the pair of mounting seats 1222, a pair of support rods 300 are provided on the lower bed frame 110. The support rods 300 are rigid rods, with their lower ends connected to corresponding parts of the lower bed frame 110 via hinge shafts, allowing the support rods 300 to swing around their hinge points. The upper ends of the support rods 300 are hinged to the mounting seats 1222 on the back panel 121 via hinge shafts. The double support rods 300 form a triangular stable structure, effectively bearing various loads generated during the lifting process of the back panel 121 and the user's weight, preventing lateral swaying or twisting of the back panel 121, and ensuring smooth movement.

[0039] See also Figure 3 In some embodiments, the motor 210 (specifically its built-in transmission system, such as a worm gear reducer) has a self-locking function. This is a mechanical characteristic typically achieved by an irreversible transmission pair (e.g., a worm gear pair). The principle is that when the motor 210 is de-energized and stops driving, the transmission pair utilizes its inherent friction angle and mechanical properties to automatically lock the output shaft, preventing it from rotating under external counterforce. The extension and retraction of the electric actuator 220 is controlled by the output shaft of the motor 210. When the user adjusts the backplate 121 to the desired angle and stops operating, the motor 210 stops rotating. At this time, its self-locking function immediately takes effect, precisely locking the screw or lead screw of the electric actuator 220 in the current position, preventing any uncontrolled extension or retraction. With the above settings, regardless of the angle of the back panel 121 or the force with which the user leans against it, the length of the electric push rod 220 is fixed due to the self-locking of the motor 210. The back panel 121 and the entire upper bed frame 120 connected to it will remain absolutely stationary relative to the lower bed frame 110, and will not accidentally retract or slide due to the user's weight pressure, thus providing reliable support.

[0040] See Figure 3 Some embodiments also provide a drive mechanism for an electric bed, including: a motor 210 hinged to the lower bed frame 110 of the electric bed; an electric push rod 220, the end of which is hinged to the back plate 121 of the upper bed frame 120 of the electric bed; a guide mechanism 111 disposed on both sides of the lower bed frame 110; and a sliding mechanism 125 disposed on both sides of the upper bed frame 120, with the position of the sliding mechanism 125 corresponding to the guide mechanism 111; wherein, when the motor 210 drives the electric push rod 220 to extend, the electric push rod 220 pushes the back plate 121 to flip upward relative to the upper bed frame 120, and through the cooperation of the sliding mechanism 125 and the guide mechanism 111, synchronously drives the entire upper bed frame 120 to translate relative to the lower bed frame 110 towards the head of the bed.

[0041] In summary, this electric bed uses an electric push rod 220 to drive the backrest 121 to rise, and simultaneously moves the entire upper bed frame 120 towards the head of the bed. This ensures that the user's body does not slide relative to the mattress when changing from a lying to a sitting position, eliminating the shearing force present in traditional electric beds and thus avoiding the risk of skin damage due to friction.

[0042] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0044] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric bed, characterized in that, include: The bed frame body (100) includes a lower bed frame (110) and an upper bed frame (120) that are arranged opposite to each other and slidably engaged. The drive mechanism (200) includes a motor (210) and an electric push rod (220); the motor (210) is mounted on the lower bed frame (110), and the electric push rod (220) is connected to the back plate (121) on the upper bed frame (120). When the motor (210) drives the electric push rod (220) to extend, the electric push rod (220) pushes the back plate (121) to flip upward relative to the upper bed frame (120), and simultaneously drives the entire upper bed frame (120) to move towards the head of the bed relative to the lower bed frame (110).

2. The electric bed as described in claim 1, characterized in that, The upper bed frame (120) slides relative to the lower bed frame (110) through the cooperation of the sliding mechanism (125) and the guide mechanism (111).

3. The electric bed as described in claim 2, characterized in that, The guiding mechanism (111) includes guide rails (112) symmetrically arranged on both sides of the lower bed frame (110), and the sliding mechanism (125) includes rollers (126) symmetrically arranged on both sides of the upper bed frame (120). The roller (126) rolls along the extension direction of the guide rail (112) to drive the entire upper bed frame (120) to translate relative to the lower bed frame (110) toward the head of the bed.

4. The electric bed as described in claim 1, characterized in that, The lower bed frame (110) is provided with a crossbar (113), and the back plate (121) is provided with a hinge seat (1211). The motor (210) is hinged to the middle of the crossbar (113) via a hinge shaft, and the end of the electric push rod (220) is hinged to the hinge seat (1211) via a hinge shaft.

5. The electric bed as described in claim 1, characterized in that, The upper bed frame (120) also includes a footboard (124), a legboard (123) and a buttocks board (122) that are hinged together in sequence, wherein the buttocks board (122) is hinged to the backboard (121); When the electric push rod (220) extends, it pushes the back plate (121) to flip upward relative to the upper bed frame (120).

6. The electric bed as described in claim 5, characterized in that, The lower end face of the back plate (121) is symmetrically provided with a pair of mounting seats (1222), and the mounting seats (1222) are hinged to the lower bed frame (110) by a pair of support rods (300).

7. The electric bed as described in claim 1, characterized in that, The motor (210) has a self-locking function, and when the electric push rod (220) stops, the back plate (121) is stationary relative to the lower bed frame (110).

8. A drive mechanism for an electric bed, characterized in that, include: The motor (210) is hinged to the lower bed frame (110) of the electric bed; An electric push rod (220) has its end hinged to the back plate (121) of the upper bed frame (120) of the electric bed; A guide mechanism (111) is provided on both sides of the lower bed frame (110); A sliding mechanism (125) is provided on both sides of the upper bed frame (120), and the position of the sliding mechanism (125) corresponds to that of the guide mechanism (111); When the motor (210) drives the electric push rod (220) to extend, the electric push rod (220) pushes the back plate (121) to flip upward relative to the upper bed frame (120), and through the cooperation of the sliding mechanism (125) and the guide mechanism (111), it synchronously drives the entire upper bed frame (120) to move towards the head of the bed relative to the lower bed frame (110).

9. The driving mechanism as described in claim 8, characterized in that, The guiding mechanism (111) includes guide rails (112) symmetrically arranged on both sides of the lower bed frame (110), and the sliding mechanism (125) includes rollers (126) symmetrically arranged on both sides of the upper bed frame (120). The roller (126) rolls along the extension direction of the guide rail (112) to drive the entire upper bed frame (120) to translate relative to the lower bed frame (110) toward the head of the bed.

10. The driving mechanism as described in claim 9, characterized in that, The lower bed frame (110) is provided with a crossbar (113), and the back plate (121) is provided with a hinge seat (1211). The motor (210) is hinged to the middle of the crossbar (113) via a hinge shaft, and the end of the electric push rod (220) is hinged to the hinge seat (1211) via a hinge shaft.

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