Single motor interlocking structure for back and knee bottoms

Abstract

To provide a single motor linked structure for the back bottom and knee bottom, which allows a user to easily get off the bed and is ergonomically preferable. [Solution] The single-motor linked structure for the back bottom and knee bottom comprises a bed frame (41), a telescopic assembly (31), a back bottom frame (11), an active member (17), a knee bottom frame (20), and a connecting rod (28). The bed frame has a back bottom that is rotatably connected and reciprocates between a raised position and a flat position, and a knee bottom that is rotatably connected to the bed frame and reciprocates between a push-up position and an extended position. One end of the telescopic assembly is rotatably installed on the bed frame and has a motor (30). The back bottom frame is rotatably connected to the bed frame.

Description

[Technical Field]

[0001] This invention relates to the field of use of beds, and in particular to a single-motor linked structure for the back and knee bottom, which converts motor torque into an extension and retraction movement, and when the back bottom is operated to raise, the knee bottom is also pushed up and flattened in conjunction with it, thereby performing two movements, making it easy for the user to get out of bed and ergonomically preferable. [Background technology]

[0002] For example, the electric lift-and-lower bed disclosed in Patent Document 1 aims to reduce costs by sharing the main components of a manual bed and an electric bed. In this solution, a bed frame (5) is supported above a carriage (3) by lifting links (4) so ​​that it can be raised and lowered. A bottom (6) is supported by lifting links (7) so that it can be raised and lowered. Electric actuators (8) are connected between the bed frame (5) and the lifting links (4) and between the bed frame (5) and the lifting links (7), respectively. A space (10) is provided between the drive ends of these electric actuators (8) and the foot ends of the bed frame (5). A control box (11) containing a controller for controlling the electric actuators (8) is provided in the bed frame (5) corresponding to the space, and a power-receiving member is provided on the head side of the bed frame (5). A wiring duct roller (15) is provided longitudinally in the bed frame (5) to house and support electric wires (17).

[0003] In principle, one controller operates the electric actuator (8c) to raise and lower the bed frame (5) relative to the trolley unit (3). The back bottom (6a) is raised relative to the bed frame (5), or the knee bottom (6c) and foot bottom (6d) are connected in a curved state to enable raising and lowering, and other operations are performed using the electric actuators (8a) and (8b). However, because the three controllers are electrically connected to each of the electric actuators (8a), (8b), and (8c), it is difficult to distinguish them, which can lead to confusion in operation.

[0004] Modification method: The control box (11) was able to operate multiple electric actuators (8a), (8b), (8c) with a single controller via a control circuit or software. Unfortunately, however, each electric actuator (8a), (8b), (8c) was expensive, which led to high manufacturing costs for the bed and a high selling price. Because the back bottom (6a) and knee bottom (6c) were raised simultaneously, the patient was forced to sit on the bed with their knees bent, making it difficult for them to get off the bed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2007117182A Summary of the Invention [Problem to be solved by the invention]

[0006] The main purpose of this invention is to provide a single-motor linked structure for the back and knee bottom, which uses a single electric cylinder to convert the motor torque into an extension / retraction motion, raising the back bottom and causing the knee bottom to perform two actions of rising and flattening, allowing a patient lying on the bed to smoothly change from a supine position with bent knees to a long sitting position with legs freely stretched, thereby reducing manufacturing costs and increasing competitiveness in the market. This allows the user to easily get out of bed and is ergonomically preferable. [Means for solving the problem]

[0007] In view of this situation, the inventors of the present invention have conducted extensive research and have solved the problems of the prior art, thereby completing the present invention.

[0008] In order to solve the above problems, according to a first aspect of the present invention, there is provided a single-motor linked structure for a back bottom and a knee bottom, comprising a bed frame (41), a telescopic assembly (31), a back bottom frame (11), an active member (17), a knee bottom frame (20) and a connecting rod (28), wherein the bed frame (41) has a back bottom (43) rotatably connected to the bed frame (41) and reciprocating between a raised position and a flat position, and a knee bottom (45) rotatably connected to the bed frame (41) and reciprocating between a push-up position and an unfolded position, one end of the telescopic assembly (31) is rotatably installed on the bed frame (41) and has a motor (30), the back bottom frame (11) is rotatably connected to the bed frame (41), The active member (17) connects the back bottom frame (11) and the other end of the telescopic assembly (31), and the telescopic assembly (31) drives the active member (17) to rotate the back bottom frame (11) in the same direction, and accordingly the back bottom (43) moves back and forth between two positions, lifted and flat. The knee bottom frame (20) is rotatably connected to the bed frame (41), and the connecting rod (28) connects the active member (17) and the knee bottom The connecting rod (28) is connected between the back bottom frame (11) and the knee bottom frame (20), and drives the knee bottom frame (20) in response to the rise of the back bottom frame (11), moving the knee bottom (45) to a push-up position, and as the back bottom frame (11) is raised at the maximum angle, the knee bottom frame (20) is reversed, and accordingly the knee bottom (45) is moved to an unfolded position.

[0009] It is preferable that a connecting member (25) for pivotally connecting the connecting rod (28) is fixed to the knee bottom frame (20).

[0010] A stop hole (25a) and an operating hole (25b) are formed in the connecting member (25), and a connecting hole (28a) and an interlocking hole (28b) are formed in the connecting rod (28). When a pivot shaft (26) is inserted into the operating hole (25b) and the interlocking hole (28b), the knee bottom frame (20) operates in conjunction with the raised back bottom frame (11), and it is preferable that when the pivot shaft (26) is inserted into the stop hole (25a) and the connecting hole (28a), the knee bottom frame (20) does not operate. [Effects of the Invention]

[0011] The single-motor linked structure of the back bottom and knee bottom of this invention converts the torque of the motor into an extension and contraction movement, and when the back bottom is operated to lift, the knee bottom is also pushed up and flattened in conjunction with it, performing two movements, making it easy for the user to get out of bed and is ergonomically preferable. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an assembled perspective view showing a first embodiment of an interlocking structure according to the present invention; [Figure 2] 2 is an explanatory diagram showing the interlocking structure of FIG. 1 attached to a bed frame. FIG. [Figure 3] FIG. 3 is a perspective view showing an electric bed having the bed frame of FIG. 2. [Figure 4] FIG. 10 is an explanatory diagram showing the standby state of the interlocking structure in which the bed is held in a flat state. [Figure 5] FIG. 1 is an explanatory diagram of a state in which a bed is used to keep a patient in a sitting position with knees bent. [Figure 6] FIG. 1 is an explanatory diagram of a bed in use that keeps a patient in a long sitting position with both legs stretched out. [Figure 7] FIG. 10 is an exploded perspective view showing a second embodiment of the interlocking structure of the present invention. [Figure 8] FIG. 8 is an explanatory diagram showing the interlocking structure of FIG. 7 attached to a bed frame. DETAILED DESCRIPTION OF THE INVENTION

[0013] (First embodiment) Please refer to Figure 1. As shown in FIG. 1, the single-motor interlocking structure for the back and knee bottoms according to the first embodiment of the present invention includes a back bottom frame 11, an active member 17, a knee bottom frame 20, a connecting member 25 and a connecting rod 28.

[0014] The back bottom frame 11 of the first embodiment is a multi-sided frame and has two rollers 15 and two axle pieces 16. The multi-sided frame has two side rods 12, an upper cross rod 13, and a lower cross rod 14. The upper cross rod 13 is fixed to one end of the two side rods 12, and the lower cross rod 14 is fixed to the other end of the two side rods 12, collectively forming the four sides of the hollow frame body. Two rollers 15 are located on both sides of the back bottom frame 11. The rollers 15 are pivotally attached to the upper cross rod 13, which is inserted into one end of the side rods 12. Two axle pieces 16 are located on both sides of the back bottom frame 11. The axle pieces 16 are welded to the outside of the opposing side rods 12, and the rollers 15 are located on the same side of the side rods 12.

[0015] The knee bottom frame 20 of the first embodiment includes a multi-sided frame on the other side of the two wheels 27. This multi-sided frame has two side rods 21, a driven rod 22, and a knee bottom rod 23. The driven rod 22 is welded to one end of the two side rods 21, and the knee bottom rod 23 is fixed to the other end of the two side rods 21, thereby forming the four sides of the T-shaped frame body. Two shafts 24 are located at both ends of the driven rod 22. The shafts 24 protrude from the side rods 21. Two wheels 27 are located on both sides of the knee bottom frame 20. The wheels 27 are pivotally attached to the knee bottom rod 23 extending from one end of the side rod 21.

[0016] The connecting rod 28 is a single bent pipe in the first embodiment, but in other embodiments it may be a solid straight rod or a shape with other functions, and is used as part of the interlocking structure 10.

[0017] The sub-shaft 19 is inserted through the overlapping portion of the connecting rod 28 and the active member 17, connecting the active member 17 and the connecting rod 28. The pivot shaft 26 (see Figure 4) is inserted through the overlapping portion of the connecting rod 28 and the connecting member 25, and the connecting member 25, the connecting rod 28, and the active member 17 combine to form a linking rod mechanism.

[0018] The active member 17 in the first embodiment is composed of two arch pieces. The two arch pieces are welded at their middle portions to the lower cross rod 14, allowing them to rotate in the same direction, connecting the active member 17 to the linking rod mechanism. The active member 17 in the first embodiment has one branched end and two main holes 18, but in other embodiments, the active member 17 may be composed of a solid body or a tube, which is also within the scope of the present invention.

[0019] The joint member 25 of the first embodiment is composed of two metal pieces. One end of each of the two metal pieces is fixed to the center of the driven rod 22, and the knee bottom frame 20 is combined with the back bottom frame 11 to operate synchronously.

[0020] Please refer to Figure 2. As shown in Figure 2, the interlocking structure 10 is placed on a bed frame 41. The two axle pieces 16 are pivotally attached to two corresponding fixed pieces 33 on the bed frame 41 and rotatably connected to a portion near the head end of the bed frame 41. The two axle sections 24 are inserted into two corresponding fixed pieces 35 on the bed frame 41. The fixed pieces 35 resemble U-shaped pieces and hold the axle sections 24 in place while supporting the knee pad frame 20, which is rotatably connected to a portion near the foot end of the bed frame 41. To this end, the interlocking structure 10 combines the active member 17 with the connecting member 25 to support the connecting rod 28 suspended from the middle of the bed frame 41.

[0021] Generally, a telescopic assembly 31 is attached to the bed frame 41. One free end of the telescopic assembly 31 is connected to the main hole 18 by a connecting member 32, such as a pin (see FIG. 1). The telescopic assembly 31 has a motor (also called an electric motor) 30. The torque force of the motor 30 is converted into longitudinal telescopic motion and transmitted to the back bottom frame 11 via the active member 17, so that the entire interlocking structure 10 of the bed frame 41 remains stopped and in a standby state. The telescopic assembly 31 is also called an electric cylinder.

[0022] Please refer to Figure 3. As shown in Figure 3, a base 42 is attached to a bed frame 41. The base 42 has a lifting function and is positioned on the ground or a floor of each floor, and is used as a lower member of one electric bed 40. A group of boards is laid on the bed frame 41 to support a mattress (not shown), and also covers the interlocking structure 10, and is used as an upper member of the electric bed 40.

[0023] Specifically, the group of boards includes a back bottom 43 , a middle board 44 , a knee board 46 and a leg board 47 .

[0024] The back bottom 43 is rotatably connected to the bed frame 41 and covers the electric cylinder and the back bottom frame. The intermediate plate 44 is fixed to the middle part of the bed frame 41 and shields part of the interlocking mechanism. The knee plate 46 is rotatably connected to the bed frame 41. The leg plate 47 is rotatably connected to the knee plate 46 and is located near the leg end of the bed frame 41. The knee plate 46 and leg plate 47 are collectively referred to as the knee bottom 45 and are used to cover the other parts of the interlocking structure.

[0025] The connecting structure between each plate and the bed frame 41 is not the technical core of this invention, so it will not be described in detail here. Interested parties are encouraged to search for related patent documents or information on commercially available electric beds.

[0026] Please refer to Figure 4. As shown in Figure 4, when powered, the motor does not start, and the telescopic assembly 31 pulls the active member 17, which abuts against the back bottom 43 via the back bottom frame 11, maintaining a flat lateral position. The active member 17 pushes the joint member 25 via the connecting rod 28, and when it abuts against the knee plate 46, the leg plate 47 extends, maintaining the knee bottom 45 in the deployed position, allowing a patient (not shown) to lie on the electric bed 40.

[0027] Please refer to Figure 5. As shown in Fig. 5, after starting the motor, the telescopic assembly 31 is extended in the longitudinal direction, pushing the connecting member 32 to perform circumferential movement around the lower cross rod 14. The back bottom frame 11 swings in the same direction as the active member 17 around the pivot point, and the roller 15 (see Fig. 1) rolls and contacts one of the two back bottom guide rails 34 of the back bottom 43, lifting the back bottom 43 at a predetermined angle (e.g., 30°) relative to the bed frame 41. For example, a patient can lean their upper body against the back bottom 43 to maintain a supine position.

[0028] Furthermore, when the sub-shaft 19 is rotated clockwise and the connecting rod 28 is pulled to push the connecting member 25 and rotate it along the circumference, the knee bottom frame 20 is rotated counterclockwise accordingly, and the wheels 27 (see FIG. 1) roll and come into contact with the knee board 46, raising the bed frame 41 to approximately the same angle. The leg board 47 is pulled up together with the knee board 46, holding the knee bottom 45 in a pushed-up position and keeping both knees of the patient bent, maintaining an ergonomically comfortable state.

[0029] Please refer to Figure 6. 6, as the telescopic assembly 31 continues to extend, the active member 17 swings the back bottom frame 11 in the same direction, supporting the back bottom 43 and lifting it to 45° relative to the bed frame 41. When the telescopic assembly 31 reaches its end point, the active member 17 drives the back bottom frame 11 to the maximum angle of the lifted position (for example, about 60°). As a result, the back bottom 43 supports the upper body, and the patient's sitting posture can be brought into a preparation state before sitting up.

[0030] Furthermore, when the rotation along the circumference exceeds a critical point, the sub-axis 19 moves downward from the right side of the lower cross rod 14. When the sub-axis 19 reaches the pivot axis 26, the connecting rod 28 is maintained in an inclined state. The active member 17 converts a pushing force into a pulling force, changing the rotation direction of the knee bottom frame 20 from counterclockwise to clockwise, and supports the total weight of the knee bottom 45 and both feet, thereby preventing accidents.

[0031] Please refer to Figure 6. As shown in Figure 6, under the pulling force of the active member 17, the total weight of the knee bottom 45 and both feet, transmitted by the connecting member 25 to which the inclined connecting rod 28 abuts, reaches the knee plate 46 that presses against the knee bottom frame 20, and is maintained at the same height as the leg plate 47. Because the knee bottom 45 is in an unfolded state and does not hinder bending and straightening of both legs, a patient sitting on the bed frame 41 can easily stand up and leave the bed.

[0032] When the patient returns to the bed frame 41 and sits down, he or she can stretch out both legs and place them on the knee pads 45. By operating the interlocking structure 10 in the opposite direction according to the sequence shown in Figures 6 to 4, the patient can lie down on the electric bed 40 again.

[0033] (Second embodiment) Please refer to Figure 7. As shown in Figure 7, the structure of the interlocking structure 10 in the second embodiment is substantially the same as that in the first embodiment, and the interlocking rod mechanism composed of the active member 17, the connecting member 25 and the connecting rod 28 first pushes up the knee bottom frame 20 and then deploys it as the back bottom frame 11 rises.

[0034] Unlike the first embodiment, the interlocking structure 10 according to the second embodiment operates by manipulating the knee bottom frame 20 and moves in conjunction with the rise of the back bottom frame 11. When the use of the interlocking structure 10 is stopped, the back bottom frame 11 rises on its own, and the knee bottom frame 20 remains in the unfolded state and does not perform the push-up action.

[0035] The structure of the second embodiment is modified in the following respects from the interlocking structure 10. The joining member 25 has a plurality of holes for selectively inserting the pivot shafts 26. Each hole is divided into a stop hole 25a and an operation hole 25b.

[0036] Next, the connecting rod 28 similarly has many holes, which are divided into a connecting hole 28a and an interlocking hole 28b. In this embodiment, the connecting hole 28a is formed as an elongated hole, and the interlocking hole 28b is formed as a circular hole.

[0037] In actual use, the interlocking structure 10 according to the second embodiment has various variations for the patient or user to choose from. For example, when the pivot shaft 26 is inserted into the overlapping operation hole 25b and interlocking hole 28b, the back bottom frame 11 gradually rises, and the interlocking rod mechanism, which is a combination of the active member 17, the joint member 25, and the connecting rod 28, drives the knee bottom frame 20, first pushing it up as shown in Figure 5, and then returning to the unfolding operation as shown in Figure 6.

[0038] Alternatively, the pivot shaft 26 is inserted into the overlapping stop hole 25a and connecting hole 28a, and even if the connecting rod 28 is displaced relative to the pivot shaft 26 by the connecting hole 28a, the active member 17 does not operate relative to the connecting member 25, and even if the back bottom frame 11 gradually rises as shown in Figure 8, the knee bottom frame 20 still remains in the unfolded state and does not perform a pushing-up operation, so the patient can get off the bed and leave at any time. [Explanation of symbols]

[0039] 10 Interlocking Structure 11 Back bottom frame 12 Side beam 13 Upper crossbar 14 Lower crossbar 15 Laura 16 Shaft piece 17 Active Members 18 Main Hall 19 Sub-axis 20 Knee bottom frame 21 Side beam 22 Driven rod 23 Knee bottom rod 24 Shaft 25 Joint materials 25a Stop hole 25b Operation hole 26 Pivot axis 27 wheels 28 consecutive rods 28a Connection hole 28b Interlocking hole 30 motor 31 Telescopic Assembly 32 Connecting member 33 Fixed piece 34 Back bottom guide rail 35 Fixation part 40 Electric Bed 41 Bed Frame 42 base 43 Back Bottom 44 Intermediate plate 45 Knee Bottoms 46 Knee plate 47 Leg board

Claims

1. A single-motor linked structure for a back bottom and a knee bottom, comprising a bed frame (41), a telescopic assembly (31), a back bottom frame (11), an active member (17), a knee bottom frame (20) and a connecting rod (28), The bed frame (41) has a back bottom (43) rotatably connected to the bed frame (41) and reciprocating between a raised position and a flat position, and a knee bottom (45) rotatably connected to the bed frame (41) and reciprocating between a pushed-up position and an unfolded position, The telescopic assembly (31) has one end rotatably mounted on the bed frame (41) and has a motor (30); The back bottom frame (11) is rotatably connected to the bed frame (41), The active member (17) connects the back bottom frame (11) and the other end of the telescopic assembly (31), and the telescopic assembly (31) drives the active member (17) to rotate the back bottom frame (11) in the same direction, thereby causing the back bottom (43) to reciprocate between two positions: up / down and flat; The knee bottom frame (20) is rotatably connected to the bed frame (41), The connecting rod (28) is connected between the active member (17) and the knee bottom frame (20), and the connecting rod (28) drives the knee bottom frame (20) in response to the rise of the back bottom frame (11), moving the knee bottom (45) to a push-up position, and as the back bottom frame (11) rises to the maximum angle, the knee bottom frame (20) is reversed, and accordingly the knee bottom (45) is moved to an unfolded position, characterized by the single-motor linked structure of the back bottom and knee bottom.

2. 2. The single motor interlocking structure of the back bottom and knee bottom according to claim 1, wherein a connecting member (25) for pivotally connecting the connecting rod (28) is fixed to the knee bottom frame (20).

3. The joining member (25) is formed with a stop hole (25a) and an operation hole (25b), The connecting rod (28) is formed with a connecting hole (28a) and an interlocking hole (28b), When the pivot shaft (26) is inserted into the operation hole (25b) and the interlocking hole (28b), the knee bottom frame (20) operates in conjunction with the raised back bottom frame (11), The single-motor linked structure of the back bottom and knee bottom as described in claim 2, characterized in that when the pivot shaft (26) is inserted through the stop hole (25a) and the connecting hole (28a), the knee bottom frame (20) does not move.

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