Electric bed

Abstract

An electric bed includes a base, a back supporting unit pivotally connected with the base, a first actuator to drive the back supporting unit to upwardly and downwardly swing relative to the base, a head supporting unit pivotally connected with the back supporting unit, and a second actuator to drive the head supporting unit to swing between an initial position and a head-up position relative to the back supporting unit. When the head supporting unit stays at the initial position, a head supporting surface of the head supporting unit is flush with a back supporting surface of the back supporting unit. The head-up position is lower than the initial position.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an electric bed and more particularly, to an electric bed having an adjustable support angle to a user's head.

2. Description of the Related Art

Conventional electric beds are usually provided with adjustable support angles to a user's head, back and legs in accordance with the user's needs, so that the user can lie or sit on the electric bed at a most comfortable angle. However, the swinging or rotational angles of parts of the conventional electric beds are usually designed in accordance with a basis that the user lies on the electric bed in a face-up manner without considering the user's need of lying on his/her stomach. As such, the conventional electric beds may not fulfil the needs of specific user groups, such as those with pressure ulcers on the back, those who are accustomed to sleeping on the stomach, or those who require massage on the back. In another aspect, many people suffer from snoring or sleep apnea. In fact, this phenomenon is related to the sleeping position. If the head can be adjusted to tilt upwardly and backwardly, the problem of snoring can be effectively relieved. However, as far as is known, there is currently no electric bed having a function that can support a user's head to a head-up manner, i.e., chin-up posture.

SUMMARY OF THE INVENTION

The present invention has been accomplished in view of the above-noted circumstances. It is an objective of the present invention to provide an electric bed, which can adjust a support angle to a user's head to enable the user to lie on his/her stomach comfortably.

It is another objective of the present invention to provide an electric bed, which can support a user in a head-up manner, thereby reliving snoring.

To attain the above objectives, the present invention provides an electric bed comprising a base, a back supporting unit, a first actuator, a head supporting unit, and a second actuator. The back supporting unit has an end pivotally connected with the base, and a top side provided with a back supporting surface. The first actuator has two ends respectively and pivotally connected with the base and the back supporting unit in a way that the back supporting unit is driven by the first actuator to upwardly and downwardly swing relative to the base. The head supporting unit has an end pivotally connected with the back supporting unit, and a top side provided with a head supporting surface. The second actuator has two ends respectively and pivotally connected with the back supporting unit and the head supporting unit in a way that the head supporting unit is driven by the second actuator to swing between an initial position and a head-up position relative to the back supporting unit. When the head supporting unit stays at the initial position, the head supporting surface is flush with the back supporting surface. The head-up position is lower than the initial position.

With the above-mentioned technical features, the electric bed of the present invention can change a support angle to a user's head to enable the user to lie on his/her stomach comfortably, and can support the user in a head-up manner, thereby relieving snoring.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a perspective view of an electric bed according to an embodiment of the present invention;

FIG. 2 is another perspective view of the electric bed according to the embodiment of the present invention:

FIG. 3 is a perspective view showing the electric bed of the embodiment of the present invention in a state of a first posture;

FIG. 4 is an enlarged perspective view showing a part of the electric bed of the embodiment of the present invention in the state of the first posture;

FIG. 5 is a perspective view showing the electric bed of the embodiment of the present invention in a state of a second posture;

FIG. 6 is an enlarged perspective view showing a part of the electric bed of the embodiment of the present invention in the state of the second posture;

FIG. 7 is a perspective view showing the electric bed of the embodiment of the present invention in a state of a third posture;

FIG. 8 is an enlarged perspective view showing a part of the electric bed of the embodiment of the present invention in the state of the third posture;

FIG. 9 is a lateral elevational view of the electric bed according to the embodiment of the present invention; and

FIG. 10 is schematic view showing that a mattress is provided with the electric bed of the embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The structure and technical features of the present invention will be detailedly described hereunder by an embodiment and accompany drawings. As shown in FIGS. 1 and 2, the electric bed 1 provided in accordance with an embodiment of the present invention is composed of a base 10, a back supporting unit 20, a first actuator 30, a head supporting unit 40, a second actuator 50, a leg supporting unit 60, and a third actuator 70.

The base 10 includes a rectangular frame 11 and a buttock supporting unit 12. The frame 11 is configured to be placed on the ground, a bed surface or a flat surface, and serves as a support base for supporting remaining elements. From the view angles of FIGS. 1 and 2, the head of the electric bed 1 is located at left side of the electric bed 1, and the tail of the electric bed 1 is located at right side. In the present invention, the direction of the bed head is defined as a front direction, and the direction of a bed tail is defined as a rear direction. In FIGS. 1 and 2, the direction D1 is defined as a back-and-forth direction, the direction D2 is defined as a right-and-left direction, and the direction D3 is defined as an up-and-down direction. The buttock supporting unit 12 is located on a middle section of the frame 11 and composed of a buttock supporting frame 14, two buttock supporting plates 16 disposed on the buttock supporting frame 14, and a pivot mount 18 downwardly and forwardly extending from the buttock supporting frame 14. The buttock supporting frame 14 is fixedly mounted with the frame 11. The two buttock supporting plates 16 are used to support a user's buttock. The buttock supporting plates 16 may, but not limited to, be made by wood, metal net, etc., and may be enveloped by foam pad to serve as cushion. The pivot mount 18 has a U-shaped cross-section having a top fixedly mounted to the buttock supporting frame 14 and being provided with two pivot holes 19 at the front end extending toward the bed head direction.

The back supporting unit 20 is located on the base 10 and provided with a rear end 21 pivotally connected with the buttock supporting frame 14 of the base 10. The back supporting unit 20 is provided at a top side thereof with a back supporting surface 22. Specifically, the back supporting unit 20 comprises a back supporting frame 24 and a back supporting plate 26 disposed on the back supporting frame 24. The back supporting plate 26 may, but not limited to, be made by wood, metal net, etc., and may be enveloped by foam pad to serve as cushion. The back supporting surface 22 is the top surface of the back supporting plate 26. The back supporting plate 26 is used to support the user's back.

The first actuator 30 has two ends pivotally connected with the base 10 and the back supporting unit 20, respectively. As such, the back supporting unit 20 is drivenable by the first actuator 30 to upwardly and downwardly swing relative to the base 10. Specifically, the power source of the first actuator 30 may be electricity, compressed gas or oil. In this embodiment, the first actuator 30 is realized as an electric actuator including a telescopic rod. The first actuator 30 has a rear end 32, i.e., the end facing toward the bed tail, pivotally connected with the pivot mount 18 via the two pivot holes 19, and a front end 34, i.e., the end facing toward the bed head, pivotally connected with the front end of the back supporting frame 24. As a result, when the length of the first actuator 30 extends, the back supporting unit 20 is driven by the first actuator 30 to swing relative to the base 10 upwardly, as shown in FIGS. 7 and 8.

The head supporting unit 40 is disposed on the base 10 and has a rear end 41 pivotally connected with the back supporting unit 20, and a top side provided with a head supporting surface 42. Specifically, the head supporting unit 40 comprises a head supporting frame 44, a head supporting plate 46 disposed on the head supporting frame 44, and a pivot mount 48 downwardly and backwardly extending from the head supporting frame 44. The head supporting plate 46 may, but not limited to, be made by wood, metal net, etc., and may be enveloped by foam pad to serve as cushion. The head supporting surface 42 is the top surface of the head supporting plate 46. The head supporting plate 46 is used to support the user's head. The pivot mount 48 has an inverted U-shaped cross-section having a top fixedly mounted to the head supporting frame 44 and being provided with two pivot holes 49 at the rear end extending toward the bed tail direction. According to statistic data, the distance from shoulder to the top of the head of human being is about 10 to 12 inches, and the distance from the top of the head of a person sleeping in a normal posture to the head of the bed is about 2 to 3 inches; therefore, the length of the head supporting plate 46 of the head supporting unit 40 in the back-and-forth direction D1 is designed to be preferably about 9 to 16 inches, and more preferably 13 to 15 inches in order to fulfil the requirement of ergonomics.

The second actuator 50 has two ends pivotally connected with the back supporting unit 20 and the head supporting unit 40, respectively. As such, the head supporting unit 40 is drivenable by the second actuator 50 to reciprocatingly swing among an initial position P0, a head-up position P1, and a head-down position P2 relative to the back supporting unit 20. Specifically, the power source of the second actuator 50 may be electricity, compressed gas or oil. In this embodiment, the second actuator 50 is realized as an electric actuator including a telescopic rod. The second actuator 50 has a rear end 52, i.e., the end facing toward the bed tail, pivotally connected with the rear end of the back supporting frame 24, and a front end 54, i.e., the end facing toward the bed head, pivotally connected with the pivot mount 48 via the two pivot holes 49.

As shown in FIGS. 1 and 2, when the head supporting unit 40 stays at the initial position P0, the head supporting surface 42 is flush with the back supporting surface 22. In such circumstance, the head supporting surface 42 and the back supporting surface 22 are both located at a same imaginary plane in this embodiment. As shown in FIGS. 3 and 4, the head-up position P1 of the head supporting unit 40 is lower than the initial position P0. Specifically, when the length of the second actuator 50 shortens, i.e., when the telescopic rod of the second actuator 50 retracts, the head supporting unit 40 is forced by the second actuator 50 to swing downwardly to the head-up position P1. In this head-up position P1, the head supporting surface 42 is defined with the back supporting surface 22 an included angle ranging from 10 degrees to 30 degrees. As shown in FIGS. 3 and 4, the included angle between the head supporting surface 42 and the back supporting surface 22 is about 20 degrees. In this way, a user lying on the electric bed 1 can comfortably lie on his/her stomach to take a rest or to facilitate a back massage. Alternatively, a user can lie on the electric bed 1 in a head-up posture, i.e., the user's head tilts backwardly and upwardly to become a chin-up manner. This newly developed supporting posture of the electric bed 1 is never seen in prior arts. In another aspect, as shown in FIGS. 5 and 6, the head-down position P2 of the head supporting unit 40 is higher than the initial position P0. Specifically, when the length of the second actuator 50 enlarges, i.e., when the telescopic rod of the second actuator 50 extends, the head supporting unit 40 is forced by the second actuator 50 to swing upwardly to the head-down position P2. In this head-down position P2, the head supporting surface 42 is defined with the back supporting surface 22 an included angle ranging from 150 degrees to 170 degrees. As shown in FIGS. 5 and 6, the included angle between the head supporting surface 42 and the back supporting surface 22 is about 160 degrees. In this way, the head of a user lying on the electric bed 1 can be supported by the head supporting unit 40 in a head-down posture, i.e., the user's head tilts forwardly and downwardly to become a chin-down manner. Moreover, as shown in FIGS. 7 and 8, when the first actuator 30 extends, the back supporting unit 20 is driven by the first actuator 30 to swing upwardly. At the same time, the second actuator 50 may retracts to drive the head supporting unit 40 to the head-up position P1. As a result, the user may rest on the electric bed 1 in a posture that the user's back is lifted and the user's head tilts backwardly and upwardly. This newly developed supporting posture of the electric bed 1 is not seen in prior arts, either.

The leg supporting unit 60 comprises a thigh supporting unit 61 and a lower leg supporting unit 65. The thigh supporting unit 61 has a structural design similar to that of the back supporting unit 20. The thigh supporting unit 61 has a front end 62 pivotally connected with the buttock supporting frame 14. The lower leg supporting unit 65 has a structural design similar to that of the back supporting unit 20, too. The lower leg supporting unit 65 has a front end 66 pivotally connected with the thigh supporting unit 61.

The third actuator 70 has two ends pivotally connected with the base 10 and the thigh supporting unit 61. In this way, the thigh supporting unit 61 is drivenable by the third actuator 70 to swing relative to the base 10 upwardly and downwardly, and the lower leg supporting unit 65 is moved along with the thigh supporting unit 61 upwardly and downwardly, as shown in FIG. 7. That is, when the third actuator 70 extends, the thigh supporting unit 61 and the lower leg supporting unit 65 are lifted upwardly.

With the above-mentioned structural design, the electric bed 1 provided by the present invention can change a support angle to a user's head to enable the user to lie on his/her stomach comfortably, and can support the user in a head-up manner. This newly developed supporting posture is not seen in the prior arts, can fulfill various needs and requirements of users, and can avoid the respiratory passage of the user from blockage to effectively relieve snoring phenomenon, thereby achieving the objectives of the present invention.

Further, as shown in FIG. 9, when the head supporting unit 40 stays at the initial position P0, the end (i.e., the front end 54) of the second actuator 50, which is pivotally connected with the head supporting unit 40, is lower in elevation than the other end (i.e., the rear end 52) of the second actuator 50, which is pivotally connected with the back supporting unit 20. This structural arrangement provides a sufficient torque to effectively drive the head supporting unit 40 to swing upwardly or downwardly when the second actuator 50 retracts or extends. Furthermore, when the head supporting unit 40 stays at the initial position P0, a bottom of the pivot mount 48 of the head supporting unit 40 is not lower in elevation than a bottom of the base 10 (i.e., the bottom of the frame 11), and a bottom of the pivot mount 18 of the buttock supporting unit 12 is not lower in elevation than a bottom of the base 10. As a result, the electric bed 1 of the present invention not only provides a newly developed supporting posture and a support angle to tilt a user's head backwardly and upwardly but also provides a thin overall thickness to facilitate transportation and storage with advantages of great flexibility in installation, convenience in usage, and great market potential.

Referring to FIG. 10, the back, head, buttock and leg supporting units 20, 40, 12 and 60 are used to support a mattress 80 thereon. To ensure that the mattress 80 will swing along with the head supporting unit 40 when the head supporting unit 40 reciprocatingly swings relative to the back supporting unit 20 upwardly and downwardly, a tying strip 82 extending along the right-and-left direction D2 is used to tie the mattress 80 and the head supporting unit 40 together. In this way, the mattress 80 is still moveable relative to the head supporting unit 40 in the back-and-forth direction D1. For example, when the head supporting unit 40 stays at the initial position P0, the front edge of the mattress 80 is flush with the front edge of the head supporting plate 46, and when the head supporting unit 40 moves to the head-up position P1, the front edge of the mattress 80 may backwardly move relative to the head supporting plate 46. When the front section of the mattress 80 is bent, this structural arrangement can avoid a forward movement of the mattress 80 that may cause loading increase of the second actuator. On the contrary, when the head supporting unit 40 moves to the head-down position P2, the front edge of the mattress 80 may forwardly move relative to the head supporting plate 46, thereby avoiding creases of the mattress 80 that may cause loading increase of the second actuator 50 when the front section of the mattress 80 is bent. In this embodiment, the tying strip 82 is realized as a hook-and-loop fastening belt equipped with a ring buckle 84, thereby facilitating adjustment of tightening degree of the tying strip 82. However, any fastening element enabling that the mattress 80 is swingable along with the head supporting unit 40 and moveable relative to the head supporting unit 40 in the back-and-forth direction D1 can be used.

Based on the technical features of the present invention, various modifications to the electric bed 1 may be made. For example, when the head supporting unit 40 stays at the head-up position P1, the included angle between the head supporting surface 42 and the back supporting surface may be adjusted and set in an range from 1 degree to 40 degrees in accordance with actual need and requirement. The third actuator 70 may be omitted, such that the leg supporting unit 60 may be configured as a stationary unit or may be adjustable manually. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims

1. An electric bed comprising: a base;a back supporting unit having an end pivotally connected with the base, and a top side provided with a back supporting surface;a first actuator having two ends respectively and pivotally connected with the base and the back supporting unit in a way that the back supporting unit is driven by the first actuator to upwardly and downwardly swing relative to the base;a head supporting unit having an end pivotally connected with the back supporting unit, and a top side provided with a head supporting surface; anda second actuator having two ends respectively and pivotally connected with the back supporting unit and the head supporting unit in a way that the head supporting unit is driven by the second actuator to swing between an initial position and a head-up position relative to the back supporting unit;wherein when the head supporting unit stays at the initial position, the head supporting surface is flush with the back supporting surface;wherein the head supporting unit is driven by the second actuator to swing downwardly from the initial position to the head-up position where the head supporting unit is lower than the head supporting unit at the initial position.

2. The electric bed as claimed in claim 1, wherein the head supporting unit is driven by the second actuator to swing to a head-down position relative to the back supporting unit; the head-down position is higher than the initial position.

3. The electric bed as claimed in claim 1, wherein when the head supporting unit stays at the initial position, one of the two ends of the second actuator, which is pivotally connected with the head supporting unit, is lower than the other of the two ends of the second actuator, which is pivotally connected with the back supporting unit.

4. The electric bed as claimed in claim 1, wherein the head supporting unit comprises a head supporting frame, a head supporting plate disposed on the head supporting frame, and a pivot mount downwardly extending from the head supporting frame; one of the two ends of the second actuator is pivotally connected with the pivot mount.

5. The electric bed as claimed in claim 4, wherein when the head supporting unit stays at the initial position, a bottom of the pivot mount is not lower than a bottom of the base.

6. The electric bed as claimed in claim 1, wherein when the head supporting unit stays at the head-up position, the head supporting surface is defined with the back supporting surface an included angle ranging from 10 degrees to 30 degrees.

7. The electric bed as claimed in claim 1, wherein the back supporting unit comprises a back supporting frame and a back supporting plate disposed on the back supporting frame; the base comprises a buttock supporting unit comprising a buttock supporting frame, a buttock supporting plate disposed on the buttock supporting frame, and a pivot mount downwardly extending from the buttock supporting frame; one of the two ends of the first actuator is pivotally connected with the pivot mount, and the other of the two ends of the first actuator is pivotally connected with the back supporting frame.

8. The electric bed as claimed in claim 7, wherein a bottom of the pivot mount of the buttock supporting unit is not lower than a bottom of the base.

9. The electric bed as claimed in claim 1, wherein the head supporting unit has a length ranging from 9 inches to 16 inches.

10. The electric bed as claimed in claim 1, comprising a mattress disposed on the back supporting unit and the head supporting unit, and a tying strip sleeving and tying the head supporting unit and the mattress together in a way that the mattress is swingable along with the head supporting unit and moveable relative to the head supporting unit in a back-and-forth direction.