A manually operated lifting bed

Abstract

The utility model provides a kind of manual lifting bed, it is related to the field of furniture goods.The lifting bed includes: bearing bed frame;Vertical guide structure, including mutually matched vertical guide rail, guide shoe and transmission structure;Safety counterweight structure, including counterweight, fixed pulley and safety rope, counterweight is slidably arranged on vertical guide structure and can be moved along vertical, fixed pulley is located above counterweight and bearing bed frame, safety rope is wound on fixed pulley, and its two ends are respectively connected counterweight and bearing bed frame;And hand crank structure, including self-locking reducer, first transmission shaft, second transmission shaft and hand crank speed increaser, self-locking reducer has two input ends and an output end, one end of second transmission shaft is connected with one of the input ends of self-locking reducer, and the other end is transmissionally connected with hand crank speed increaser.The self-locking reducer of the application has self-locking function, and the balance effect of superimposed safety counterweight forms double safety guarantee, and improves locking stability.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and more specifically, to a manually operated lifting bed. Background Technology

[0002] A manually operated adjustable bed is a type of bed that does not rely on electricity. The overall height of the bed or the angle of the headboard or footboard can be adjusted manually using handles, handwheels, or other manual operating components. Its core feature is that it relies on human intervention for adjustment, resulting in a relatively simple structure. It is commonly used in home care settings (facilitating getting in and out of bed for the elderly or patients, or for nursing care), temporary living spaces (such as rented accommodations), or environments with low reliance on electricity. It also boasts advantages such as low cost, easy maintenance, and continued operation even after a power outage. The bed height or tilt angle can be flexibly adjusted according to the user's needs, adapting to different scenarios such as rest and nursing care.

[0003] To prevent accidental displacement after adjustment, manual lifting beds primarily rely on mechanical locking mechanisms for locking. The entire process requires no electricity; the core principle is to fix the bed's height and angle through physical clamping or engagement. Common locking methods include three types: First, a ratchet and pawl structure, where turning the handwheel or crank rotates the ratchet, and the pawl automatically engages with the ratchet after stopping, preventing reverse rotation; second, a screw thread self-locking design, utilizing the frictional properties of the thread to remain stationary when there is no external force, preventing the bed surface from sliding down; and third, an additional locking pin or latch, manually inserted after adjustment to the target position, further enhancing locking stability and ensuring user safety.

[0004] However, it should be noted that when the bed is locked, the weight of the bed itself and the user's weight will be fully applied to the mechanical locking structure—this structure is both the core of the locking security and bears all the load. If used under high load for a long time or if the structure is worn out, the locking components may wear out, deform, or even fail, which could lead to safety accidents such as the bed surface slipping unexpectedly. Utility Model Content

[0005] The purpose of this utility model is to provide a manually operated lifting bed, which aims to solve the technical problems in the background art mentioned above.

[0006] The embodiments of this utility model are implemented as follows: This application provides a manually operated lifting bed, including: a support bed frame; a vertical guide structure, including a vertical guide rail, a guide shoe, and a transmission structure that cooperate with each other, wherein the transmission structure connects the guide shoe and the vertical guide rail, and is used to drive the guide shoe to slide along the vertical direction of the vertical guide rail; the guide shoe is connected to the support bed frame, and is used to drive the support bed frame to rise and fall along the vertical direction of the vertical guide structure; and a safety counterweight structure, including a counterweight block, a fixed pulley, and a safety rope, wherein the counterweight block is slidably disposed on the vertical guide structure and can move vertically, and the fixed pulley is provided with... Above the counterweight and the supporting bed frame, the safety rope is wound around the fixed pulley, and its two ends are respectively connected to the counterweight and the supporting bed frame; and a hand-cranked structure, including a self-locking reducer, a first drive shaft, a second drive shaft and a hand-cranked speed increaser, wherein the self-locking reducer has two input ends and one output end, the output end is connected to the transmission structure via the first drive shaft, one end of the second drive shaft is connected to one of the input ends of the self-locking reducer, and the other end extends downwards from the vertical guide rail and is connected to the hand-cranked speed increaser.

[0007] Furthermore, based on the aforementioned scheme, a gear is fixedly sleeved on the input end of the self-locking reducer away from the input end of the hand-cranked speed increaser, and an adjusting chain belt is wound around the gear.

[0008] Furthermore, based on the aforementioned scheme, the transmission structure includes: a first sprocket rotatably disposed on the upper part of the vertical guide rail; a second sprocket rotatably disposed on the lower part of the vertical guide rail; and an annular chain wound around the first sprocket and the second sprocket to form a closed transmission circuit, wherein a portion of the annular chain is connected to the guide shoe for driving the guide shoe to slide along the vertical guide rail.

[0009] Furthermore, based on the aforementioned scheme, there are two vertical guide structures, which are arranged in parallel with gaps, and the guide shoes of both vertical guide structures are connected to the aforementioned load-bearing bed frame; wherein, the first sprockets of the two vertical guide structures are connected by a third drive shaft.

[0010] Furthermore, based on the aforementioned scheme, the vertical guide rail has a vertical slide groove, one end of the guide shoe slides in cooperation with the vertical slide groove, and the other end extends out of the vertical slide groove and connects to the supporting bed frame; wherein, the first sprocket, the second sprocket and the annular chain are all disposed inside the vertical slide groove.

[0011] Furthermore, based on the aforementioned scheme, the counterweight is slidably disposed on the outer side of the vertical guide rail, the counterweight is provided with a guide slider, and the outer side of the vertical guide rail is provided with a guide rail adapted to the sliding of the guide slider; wherein, the vertical guide rail is provided with an opening connecting its vertical slide groove and the external space, and the fixed pulley is disposed in the opening.

[0012] Furthermore, based on the aforementioned scheme, the number of safety ropes is two; wherein, the fixed pulley has two guide grooves, which are respectively adapted to the two safety ropes.

[0013] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: The lifting bed described in this application uses a load-bearing bed frame as its core and achieves stable lifting through a vertical guiding structure (vertical guide rails, guide shoes, and a transmission structure). It is driven by a hand-cranked mechanism—a hand-cranked speed increaser transmits power via a drive shaft to a self-locking reducer. The output of the self-locking reducer then drives the transmission structure, ultimately causing the guide shoes to slide vertically along the guide rails carrying the load-bearing bed frame. Simultaneously, a safety counterweight structure connects the counterweight block and the load-bearing bed frame via a fixed pulley and safety rope, balancing part of the weight of the load-bearing bed frame and the user. This solution offers significant advantages: First, the safety counterweight structure can share the entire weight borne by the mechanical locking structure in existing technologies, significantly reducing the load on the locking components and preventing wear, failure, and bed surface slippage accidents caused by long-term high loads. Second, the self-locking reducer has a built-in self-locking function, which, combined with the balancing effect of the safety counterweight, forms a double safety guarantee, improving locking stability. Third, the hand-cranked speed increaser reduces the intensity of manual operation, and the vertical guiding structure ensures a smooth lifting process, balancing safety and ease of use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 An isometric view of a manually operated lifting bed according to an embodiment of this utility model. Figure 1 ; Figure 2 An isometric view of a manually operated lifting bed according to an embodiment of this utility model. Figure 2 ; Figure 3 for Figure 1 A magnified view of part A in the image; Figure 4 This is a partial schematic diagram of a manually operated lifting bed according to an embodiment of the present invention. Figure 1 ; Figure 5 This is a partial schematic diagram of a manually operated lifting bed according to an embodiment of the present invention. Figure 2 ; Figure 6 This is a partial cross-sectional view of the vertical guide structure according to an embodiment of the present invention; Figure 7 This is a partial schematic diagram of the vertical guide structure according to an embodiment of the present invention; Figure 8 This is an isometric view of the transmission structure according to an embodiment of the present invention; Figure 9 This is an isometric view of the vertical guide rail according to an embodiment of the present invention.

[0016] Icons: 1-Bearing bed frame, 2-Vertical guide rail, 201-Vertical slide, 202-Opening, 3-Counterweight, 4-Safety rope, 5-First drive shaft, 6-Self-locking reducer, 7-Adjusting chain belt, 8-Second drive shaft, 9-Hand crank speed increaser, 10-Third drive shaft, 11-Actuating gear, 12-Positioning plate, 13-Buffer spring, 14-Fixed pulley, 15-First sprocket, 16-Ring chain, 17-Guide shoe, 18-Second sprocket. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0018] Please refer to Figures 1-9 This application provides a manually operated lifting bed, comprising: a support bed frame 1; a vertical guide structure, including a vertical guide rail 2, a guide shoe 17, and a transmission structure, wherein the transmission structure connects the guide shoe 17 and the vertical guide rail 2, and drives the guide shoe 17 to slide along the vertical direction of the vertical guide rail 2, and the guide shoe 17 is connected to the support bed frame 1, and drives the support bed frame 1 to rise and fall along the vertical direction of the vertical guide structure; and a safety counterweight structure, including a counterweight block 3, a fixed pulley 14, and a safety rope 4, wherein the counterweight block 3 is slidably disposed on the vertical guide structure and can move vertically, and the fixed pulley 14... 14 is positioned above the counterweight 3 and the supporting bed frame 1. The safety rope 4 is wound around the fixed pulley 14, and its two ends are respectively connected to the counterweight 3 and the supporting bed frame 1; and a hand-cranked structure, including a self-locking reducer 6, a first drive shaft 5, a second drive shaft 8 and a hand-cranked speed increaser 9. The self-locking reducer 6 has two input ends and one output end. The output end is connected to the transmission structure through the first drive shaft 5. One end of the second drive shaft 8 is connected to one of the input ends of the self-locking reducer 6, and the other end extends downward to the vertical guide rail 2 and is connected to the hand-cranked speed increaser 9.

[0019] The lifting bed of this application uses the supporting bed frame 1 as its core and achieves stable lifting by means of a vertical guide structure (vertical guide rail 2, guide shoe 17, and transmission structure). It is driven by a hand-cranked mechanism—a hand-cranked speed increaser 9 transmits power to a self-locking reducer 6 via a transmission shaft. The output of the self-locking reducer 6 then drives the transmission structure, ultimately causing the guide shoe 17 to slide vertically along the guide rail with the supporting bed frame 1. Simultaneously, a safety counterweight structure connects the counterweight block 3 and the supporting bed frame 1 via a fixed pulley 14 and a safety rope 4, balancing part of the weight of the supporting bed frame 1 and the user. This solution has significant advantages: First, the safety counterweight structure can share the entire weight borne by the mechanical locking structure in existing technologies, significantly reducing the load on the locking components and avoiding wear, failure, and bed surface slippage accidents caused by long-term high loads; second, the self-locking reducer 6 has a self-locking function, which, combined with the balancing effect of the safety counterweight, forms a double safety guarantee, improving locking stability; third, the hand-cranked speed increaser 9 reduces the intensity of manual operation, and the vertical guide structure ensures a smooth lifting process, balancing safety and ease of use.

[0020] In a preferred embodiment, the self-locking reducer 6 is fixedly sleeved with a gear 11 at the input end away from the hand-cranked speed increaser 9, and the gear 11 is wound with an adjusting chain belt 7.

[0021] In the above embodiments, the adjusting chain 7 supports manual operation. When it is inconvenient to operate the hand-cranked speed increaser 9 (such as when space is limited or the user has difficulty exerting force), the manual operation of the shift gear 11 and the input end of the self-locking reducer 6 can provide an additional manual way to adjust the lifting of the supporting bed frame 1, further improving the operational flexibility.

[0022] In a preferred embodiment, the transmission structure includes: a first sprocket 15 rotatably disposed on the upper part of the vertical guide rail 2; a second sprocket 18 rotatably disposed on the lower part of the vertical guide rail 2; and an annular chain 16 wound around the first sprocket 15 and the second sprocket 18 to form a closed transmission circuit, wherein a portion of the annular chain 16 is connected to the guide shoe 17 for driving the guide shoe 17 to slide along the vertical guide rail 2.

[0023] In the above embodiments, the transmission structure adopts a closed transmission design of "double sprockets + ring chain 16", which has significant advantages: On the one hand, the meshing transmission of the sprockets and chain has strong load-bearing capacity and can stably transmit power to drive the guide shoe 17 and the supporting bed frame 1 to rise and fall. It can be adapted to the weight of the bed itself and the user, avoiding transmission failure due to excessive load, and making up for the shortcomings of the mechanical locking structure in the prior art that bears pressure alone; On the other hand, the closed transmission circuit can ensure that the guide shoe 17 slides along the vertical guide rail 2 without slippage or deviation, making the lifting process smoother. Moreover, the sprocket and chain structure is simple and durable, with low maintenance costs, and can operate stably for a long time without complicated maintenance, further improving the reliability and convenience of the manual lifting bed.

[0024] In a preferred embodiment, there are two vertical guide structures, which are arranged in parallel with gaps between them, and the guide shoes 17 of both vertical guide structures are connected to the bearing bed frame 1; wherein, the first sprockets 15 of the two vertical guide structures are connected by a third drive shaft 10.

[0025] In the above embodiment, two parallel vertical guide structures are connected to the load-bearing bed frame 1 through guide shoes 17, and their first sprockets 15 are connected via a third drive shaft 10. This not only enhances the stability of the load-bearing bed frame 1 during lifting and lowering and avoids deviation and swaying, but also enables synchronous transmission of the dual guide structures to ensure smooth lifting and lowering, and can also share the load to improve the overall load-bearing reliability.

[0026] In a preferred embodiment, the vertical guide rail 2 has a vertical slide groove 201, one end of the guide shoe 17 is slidably engaged with the vertical slide groove 201, and the other end extends out of the vertical slide groove 201 and is connected to the supporting bed frame 1; wherein, the first sprocket 15, the second sprocket 18 and the annular chain 16 are all disposed inside the vertical slide groove 201.

[0027] In the above embodiment, the vertical slide groove 201 of the vertical guide rail 2 can not only allow the guide shoe 17 to slide stably to connect to the supporting bed frame 1, but also house the first sprocket 15, the second sprocket 18 and the ring chain 16 inside, which can protect the transmission components from dust and collision to extend their service life, and also reduce the external space occupation to make the overall structure more compact, while ensuring the stability of transmission and lifting.

[0028] In a preferred embodiment, the counterweight 3 is slidably disposed on the outer side of the vertical guide rail 2, the counterweight 3 is provided with a guide slider, and the outer side of the vertical guide rail 2 is provided with a guide rail adapted to the sliding of the guide slider; wherein, the vertical guide rail 2 is provided with an opening 202, which connects its vertical slide groove 201 and the external space, and the fixed pulley 14 is disposed in the opening 202.

[0029] In the above embodiment, the counterweight 3 slides with the guide rail on the outer side of the vertical guide rail 2 through the guide slider, which not only ensures that the counterweight 3 rises and falls smoothly to accurately balance the weight of the bed frame, but also separates it from the transmission components in the guide rail to avoid interference; at the same time, the opening 202 of the vertical guide rail 2 facilitates the passage of the safety rope 4 to connect the counterweight 3 and the bed frame, and makes the installation of the fixed pulley 14 more convenient, thus optimizing the overall structural layout and improving the operational stability.

[0030] In a preferred embodiment, the number of safety ropes 4 is two; wherein the fixed pulley 14 has two guide grooves, which are respectively adapted to the two safety ropes 4.

[0031] In the above embodiment, two safety ropes 4 are provided and paired with a fixed pulley 14 with two matching guide grooves. This not only reduces the safety risk of single rope breakage by sharing the load with two ropes, but also ensures that the two safety ropes 4 run synchronously by means of the double guide grooves, avoiding entanglement or uneven force, thereby further improving the stability of the counterweight balance and the safety of use.

[0032] Optionally, a buffer spring 13 is sleeved on the safety rope 4 of the counterweight 3, and a positioning plate 12 adapted to the buffer spring 13 is provided on the outer side of the vertical guide rail 2. The positioning plate 12 has an opening for the safety rope 4 to pass through. When the counterweight 3 or guide shoe 17 moves and generates an impact, the buffer spring 13 can form a contacting fit with the positioning plate 12 to achieve buffering. Its advantage is that it can effectively absorb the impact force generated by sudden force, start and stop during the lifting process, and avoid damage to the safety rope 4 and connecting parts due to excessive instantaneous force.

[0033] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0034] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A manually operated lift bed characterized by, include: Support bed frame (1); The vertical guide structure includes a vertical guide rail (2), a guide shoe (17), and a transmission structure that cooperate with each other. The transmission structure connects the guide shoe (17) and the vertical guide rail (2) and is used to drive the guide shoe (17) to slide along the vertical direction of the vertical guide rail (2). The guide shoe (17) is connected to the support bed frame (1) and is used to drive the support bed frame (1) to rise and fall along the vertical direction of the vertical guide structure. The safety counterweight structure includes a counterweight block (3), a fixed pulley (14), and a safety rope (4). The counterweight block (3) is slidably mounted on the vertical guide structure and can move vertically. The fixed pulley (14) is located above the counterweight block (3) and the supporting bed frame (1). The safety rope (4) is wound around the fixed pulley (14), and its two ends are respectively connected to the counterweight block (3) and the supporting bed frame (1). The hand-cranked structure includes a self-locking reducer (6), a first drive shaft (5), a second drive shaft (8), and a hand-cranked speed increaser (9). The self-locking reducer (6) has two input ends and one output end. The output end is connected to the transmission structure via the first drive shaft (5). One end of the second drive shaft (8) is connected to one of the input ends of the self-locking reducer (6), and the other end extends downwards from the vertical guide rail (2) and is connected to the hand-cranked speed increaser (9).

2. A manually operated lift bed according to claim 1, wherein, The self-locking reducer (6) has a fixed actuating gear (11) sleeved at the input end away from the hand-cranked speed increaser (9), and the actuating gear (11) is wound with an adjusting chain belt (7).

3. A manual lift bed according to claim 1, wherein, The transmission structure includes: The first sprocket (15) is rotatably mounted on the upper part of the vertical guide rail (2); The second sprocket (18) is rotatably disposed at the lower part of the vertical guide rail (2); A ring chain (16) is wound around the first sprocket (15) and the second sprocket (18) to form a closed transmission circuit. A portion of the ring chain (16) is connected to the guide shoe (17) to drive the guide shoe (17) to slide along the vertical guide rail (2).

4. A manually operated lifting bed according to claim 3, wherein The number of vertical guide structures is two, the two vertical guide structures are arranged in parallel and with gaps, and the guide shoes (17) of the two vertical guide structures are connected to the supporting bed frame (1); The first sprockets (15) of the two vertical guide structures are connected by a third drive shaft (10).

5. A manual lift bed according to claim 3, wherein, The vertical guide rail (2) has a vertical slide groove (201), one end of the guide shoe (17) is slidably engaged with the vertical slide groove (201), and the other end extends out of the vertical slide groove (201) and is connected to the supporting bed frame (1); The first sprocket (15), the second sprocket (18) and the annular chain (16) are all disposed inside the vertical groove (201).

6. A manual lift bed according to claim 5, wherein, The counterweight (3) is slidably disposed on the outer side of the vertical guide rail (2). The counterweight (3) is provided with a guide slider. The outer side of the vertical guide rail (2) is provided with a guide rail adapted to the sliding of the guide slider. The vertical guide rail (2) is provided with an opening (202) that connects its vertical slide groove (201) to the external space, and the fixed pulley (14) is provided in the opening (202).

7. A manual lift bed according to claim 1 wherein, The number of safety ropes (4) is two; The fixed pulley (14) has two guide grooves, which are respectively adapted to the two safety ropes (4).

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