Sitting and lying dual-purpose device

Abstract

The utility model discloses a sitting and lying dual-purpose device which comprises a seat part, a backrest part capable of being overturned front and back relative to the seat part, and armrest parts arranged on the left side and the right side of the seat part. An armrest linkage mechanism is arranged between the armrest part and the backrest part, the armrest part is driven by the armrest linkage mechanism to move downwards when the backrest part is turned over from front to back, and the armrest part is driven by the armrest linkage mechanism to move upwards when the backrest part is turned over from back to front. According to the sitting and lying dual-purpose device, when the backrest part turns over from front to back, the armrest parts are synchronously driven to move downwards, space can be reserved for movement of the hands of a user, the armrest storage function is achieved, and the user can enter and exit from the left side and the right side of the sitting and lying dual-purpose device conveniently.

Description

Technical Field

[0001] The utility model relates to a sitting and lying dual-purpose device. Background Art

[0002] Patent application CN201710326956.4 discloses a dual-purpose wheelchair bed, the bed board mechanism of which includes a backboard, a seat board and a leg board, and guardrails are provided on the left and right sides of the backboard, and the solution can be converted between a bed and a wheelchair. The disadvantage of the aforementioned solution is that when the wheelchair bed is in the bed state, the guardrails on the left and right sides of the backboard will hinder the user from getting on and off the wheelchair bed, which is inconvenient to use. In view of this, this application is specially proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a sitting and lying dual-purpose device which is convenient for users to use.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a sitting or lying dual-purpose device, comprising a seat, a backrest that can be flipped forward and backward relative to the seat, and armrests arranged on the left and right sides of the seat; an armrest linkage mechanism is arranged between the armrest and the backrest, and when the backrest is flipped from front to back, the armrest is driven to move downward by the armrest linkage mechanism, and when the backrest is flipped from back to front, the armrest is driven to move upward by the armrest linkage mechanism.

[0005] Preferably, the armrest linkage mechanism includes a four-bar linkage assembly and an armrest linkage rod, the upper link of the four-bar linkage assembly is connected to the armrest portion, the lower link of the four-bar linkage assembly is installed on the seat portion, one end of the armrest linkage rod is pivotally connected to the backrest portion, and the other end is pivotally connected to the front link or the rear link of the four-bar linkage assembly.

[0006] Preferably, the sitting and lying dual-purpose device further comprises a lower limb supporting portion which can be flipped up and down relative to the front side of the seat portion, and a lower limb driving mechanism for driving the lower limb supporting portion to flip up and down is provided between the seat portion and the lower limb supporting portion.

[0007] Preferably, the lower limb supporting portion includes a frame portion and a flip portion, the frame portion is pivotally connected to the seat portion, the flip portion is mounted on the frame portion and can flip relative to the frame portion; the lower limb driving mechanism is arranged between the seat portion and the frame portion.

[0008] Preferably, one of the front and rear sides of the flip portion is a planar structure, and the other is a mountain-shaped structure.

[0009] Preferably, the seat is mounted on a base frame and is in rolling or sliding cooperation with the base frame in a front-to-rear direction, and a seat driving mechanism for driving the seat to move forward and backward is provided between the seat and the base frame.

[0010] Preferably, a backrest linkage mechanism is provided between the seat and the backrest portion, and the backrest linkage mechanism is configured to: be in a linkage obstruction state that restricts the seat from driving the backrest portion to flip over when the rear side of the seat is located in a first area, and be in a linkage permission state that allows the seat to drive the backrest portion to flip over when the rear side of the seat is located in a second area; the second area is located in front of the first area.

[0011] Preferably, the backrest linkage mechanism comprises a seat connecting rod, a backrest connecting rod and a base frame connecting rod; the middle portion of the seat connecting rod is pivotally connected to the seat, and the two ends thereof are respectively pivotally connected to the first end of the backrest connecting rod and the first end of the base frame connecting rod; the second end of the backrest connecting rod is pivotally connected to the backrest portion, and the second end of the base frame connecting rod is pivotally connected to the base frame; when the backrest linkage mechanism changes from a linkage obstructed state to a linkage allowed state, the lower side included angle of the seat connecting rod and the backrest connecting rod changes from greater than 180 degrees to less than 180 degrees.

[0012] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: in the sitting and lying dual-purpose device of the present application, when the backrest is flipped from front to back, the armrest is simultaneously driven to move downward, which can make space for the user's hand movements, realize the armrest storage function, and facilitate the user to enter and exit from the left and right sides of the sitting and lying dual-purpose device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0014] Figures 1 to 3 Schematic diagrams of a sitting and lying dual-purpose device according to an embodiment are respectively depicted from different viewing angles;

[0015] Figure 4 A first exploded view of a sitting and sleeping device according to an embodiment is shown;

[0016] Figure 5 A second exploded view of a sitting and sleeping device according to an embodiment is shown;

[0017] Figure 6 A third exploded view of a sitting and sleeping device according to an embodiment is shown;

[0018] Figure 7 A fourth exploded view of a sitting and sleeping device according to an embodiment is shown;

[0019] Figure 8 A fifth exploded view of a sitting and sleeping device according to an embodiment is shown;

[0020] Fig. 9 A schematic diagram of a sitting and lying dual-purpose device according to an embodiment is shown in a lying position;

[0021] Fig.10 An exploded view of a sitting and sleeping device according to an embodiment of the present invention is shown in a lying position;

[0022] Fig.11 A schematic diagram of a sitting and lying dual-purpose device according to an embodiment is shown in a sitting position, with the flip part flipped over;

[0023] Fig.12 A diagram showing a change in a sitting and lying dual-purpose device according to an embodiment from a sitting position to a lying position (with armrests omitted);

[0024] Fig.13 A diagram showing a change in a sitting and lying dual-purpose device according to an embodiment from a sitting position to a lying position is shown;

[0025] Fig.14 A diagram showing a change in a backrest linkage mechanism of an embodiment from a linkage-impeded state to a linkage-allowed state;

[0026] Fig.15 A diagram showing the changing states of a backrest linkage mechanism according to an embodiment of the present invention is shown.

[0027] Reference numerals:

[0028] The seat part 1, the backrest part 2, the lower limb supporting part 3, the lower limb driving mechanism 4, the armrest part 5, the base frame 6, the seat driving mechanism 7, the backrest linkage mechanism 8, and the armrest linkage mechanism 9. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0031] Combination Figures 1 to 15 In one embodiment, the present invention comprises a seat 1, a backrest 2, a lower limb support 3, a lower limb drive mechanism 4, an armrest 5, a base 6, a seat drive mechanism 7, a backrest linkage mechanism 8 and an armrest linkage mechanism 9. For ease of explanation, the X direction in the figure is the front-to-back direction, the Y direction is the left-right direction, and the Z direction is the up-down direction. Fig.12 and Fig.13 The dual-purpose sitting and lying device of the present application can switch between a sitting state and a lying state. Specifically, if the dual-purpose sitting and lying device needs to be changed from a sitting state to a lying state, the rear side of the seat 1 first moves forward in the first area L1, and in the first area L1, the backrest 2 is always in a tilted state; further, the rear side of the seat 1 enters the second area L2 and gradually moves forward, and in the second area L2, the backrest 2 gradually flips backward from the tilted state to a lying state; further, the lower limb driving mechanism 4 drives the lower limb supporting part 3 to flip and lift upward (it should be understood that the step of flipping the lower limb supporting part 3 upward can also be advanced). In the above manner, the dual-purpose sitting and lying device is changed from a sitting state to a lying state. In the dual-purpose sitting and lying device of this embodiment, when changing from a sitting state to a lying state, the rear side of the seat 1 first moves forward in the first area L1, and the backrest 2 remains in a tilted state during this process. This method ensures that the backrest 2 can flip forward and backward relative to the seat 1 in a large range, and ensures that the dual-purpose sitting and lying device has a zero wall-leaning function. The following will be described in detail in conjunction with the specific structure of the sitting and lying dual-purpose device.

[0032] Combination Figure 4 The seat 1 is used to support the user's buttocks. In the present embodiment, it includes a seat frame 1A and a seat cushion 1B. The seat cushion 1B is installed on the upper side of the seat frame 1A, but it should be understood that the seat frame 1A and the seat cushion 1B can also be designed as an integrated structure, for example, integrally formed by injection molding. Side rollers T1 are provided on the left and right sides of the seat frame 1A. The side rollers T1 roll with the slide grooves 6A of the bottom frame 6, so that the seat 1 and the bottom frame 6 roll in the front-to-back direction X. But it should be understood that the side rollers T1 can also be adjusted into strip guides, which slide in the slide grooves 6A through the strip guides, so that the seat 1 and the bottom frame 6 slide in the front-to-back direction X. A front roller T2 is provided on the front side of the seat frame 1A. The front roller T2 touches the ground and can assist the overall movement of the seat 1. Combined with Fig.12 and Fig.13 The seat 1 is mounted on the bottom frame 6, and the seat 1 can move forward and backward on the bottom frame 6, so that the rear side of the seat 1 switches between the first area L1 and the second area L2, and the second area L2 is located in front of the first area L1. The seat driving mechanism 7 is installed between the seat 1 and the bottom frame 6 to drive the seat 1 to slide forward and backward.

[0033] The backrest 2 is located at the rear side of the seat 1, and is used to support the back of the user. It is configured to be able to flip forward and backward relative to the seat 1. In this embodiment, the backrest 2 includes a back frame 2A and a back cushion 2B. The back cushion 2B is installed on the front side of the back frame 2A. The back frame 2A and the back cushion 2B can also be designed as an integrated structure, for example, integrally formed by injection molding. A massage movement P is installed on the back frame 2A of the backrest 2. The massage movement P can move along the back frame 2A. The back cushion 2B is provided with an opening S for the massage parts of the massage movement P to pass through for massage. The massage movement P can be a common massage movement with functions such as kneading, tapping, and pressing, which will not be described in detail.

[0034] The backrest linkage mechanism 8 is installed between the seat 1 and the backrest 2, and is combined with Figures 12 to 15 , the backrest linkage mechanism 8 is configured as follows: when the rear side of the seat 1 is located in the first area L1, it is in a linkage obstruction state that restricts the seat 1 from driving the backrest 2 to flip, and when the rear side of the seat 1 is located in the second area L2, it is in a linkage permission state that allows the seat 1 to drive the backrest 2 to flip. In this embodiment, the backrest linkage mechanism 8 includes a seat connecting rod 8A, a backrest connecting rod 8B and a base frame connecting rod 8C. The middle portion of the seat connecting rod 8A is pivotally connected to the seat 1, and its two ends are pivotally connected to the first end of the backrest connecting rod 8B and the first end of the base frame connecting rod 8C, respectively. The second end of the backrest connecting rod 8B is pivotally connected to the backrest 2, and the second end of the base frame connecting rod 8C is pivotally connected to the base frame 1. As Figure 12 to Figure 14 When the rear side of the seat 1 gradually moves forward in the first area L1, the backrest linkage mechanism 8 gradually changes from the linkage obstructed state to the critical state. After the rear side of the seat 1 enters the second area L2, the backrest linkage mechanism 8 changes from the critical state to the linkage allowed state. In this process, the angle a between the lower sides of the seat connecting rod 8A and the backrest connecting rod 8B gradually changes from greater than 180 degrees to less than 180 degrees. By utilizing the delay effect of the relative angle change of the seat connecting rod 8A and the backrest connecting rod 8B, the seat 1 can slide forward a certain distance relative to the base frame 6 before driving the backrest 2 to start the reclining action, thereby realizing the zero-wall-relaxation function of the seat 1 sliding forward and linking the backrest 2 to completely lie down.

[0035] The lower limb support part 3 is pivotally connected to the front side of the seat 1, and can be flipped up and down relative to the front side of the seat 1. In this embodiment, the lower limb support part 3 includes a frame part 3A and a flip part 3B. The frame part 3A is pivotally connected to the seat 1, and the flip part 3B is installed on the frame part 3A. Figure 1 and Fig.11 The flip part 3B can flip relative to the frame part 3A, and the flip angle in this embodiment is 180 degrees. One of the front and rear sides of the flip part 3B is a planar structure, and the other is a mountain-shaped structure.

[0036] The lower limb driving mechanism 4 is arranged between the seat 1 and the frame portion 3A of the lower limb supporting portion 3, and is used to drive the lower limb supporting portion 3 to flip up and down. In this embodiment, the lower limb driving mechanism 4 includes a telescopic push rod 4A and a transmission assembly 4B. The motor end of the telescopic push rod 4A is pivotally connected to the seat 1, and the transmission assembly 4B is installed between the telescopic rod end of the telescopic push rod 4A and the frame portion 3A of the lower limb supporting portion 3. Fig.12 When the telescopic push rod 4A is telescopic, the transmission assembly 4B drives the lower limb supporting part 3 to flip. In this embodiment, the transmission assembly 4B is a common connecting rod assembly, which will not be described in detail.

[0037] The armrests 5 are arranged on the left and right sides of the seat 1. The armrest linkage mechanism 9 is arranged between the armrests 5 and the backrest 2. Fig.13 When the backrest 2 is flipped from front to back, the armrest 5 is driven to move downward by the armrest linkage mechanism 9, and when it is flipped from back to front, the armrest 5 is driven to move upward by the armrest linkage mechanism 9. In this embodiment, the armrest linkage mechanism 9 includes an upper connecting rod 9A, a lower connecting rod 9B, a front connecting rod 9C, a rear connecting rod 9D, an armrest linkage rod 9E and an auxiliary connecting rod 9F. The upper connecting rod 9A, the lower connecting rod 9B, the front connecting rod 9C and the rear connecting rod 9D form a four-link assembly. The upper connecting rod 9A is connected to the armrest 5, the lower connecting rod 9B is installed on the seat 1, one end of the armrest linkage rod 9E is pivotally connected to the backrest 2, and the other end is pivotally connected to the rear connecting rod 9D (it can also be adjusted to be pivotally connected to the front connecting rod 9C).

[0038] The dual-purpose sitting and lying device of the present application has the armrest portion moved downwardly synchronously when the backrest portion flips from front to back, which can make room for the user's hand movements, realize the armrest storage function, and facilitate the user to enter and exit the dual-purpose sitting and lying device from the left and right sides.

[0039] The above is an embodiment of the present application, but it should be understood that the present application may have other variant designs. In another embodiment, the base frame and the seat driving mechanism may be omitted. In another embodiment, the backrest linkage mechanism may be omitted, and a backrest driving mechanism for driving the backrest to flip may be provided between the seat 1 and the backrest 2.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A device for sitting or lying down, comprising a seat (1), a backrest (2) capable of being flipped forward and backward relative to the seat (1), and armrests (5) arranged on the left and right sides of the seat (1); characterized in that: An armrest linkage mechanism (9) is provided between the armrest portion (5) and the backrest portion (2); when the backrest portion (2) is flipped from front to back, the armrest linkage mechanism (9) drives the armrest portion (5) to move downward; and when the backrest portion (2) is flipped from back to front, the armrest linkage mechanism (9) drives the armrest portion (5) to move upward.

2. The sitting and lying dual-purpose device according to claim 1, characterized in that: The armrest linkage mechanism (9) comprises a four-link assembly and an armrest linkage rod (9E), wherein the upper link (9A) of the four-link assembly is connected to the armrest portion (5), the lower link (9B) of the four-link assembly is mounted on the seat portion (1), one end of the armrest linkage rod (9E) is pivotally connected to the backrest portion (2), and the other end is pivotally connected to the front link (9C) or the rear link (9D) of the four-link assembly.

3. The sitting and lying dual-purpose device according to claim 1, characterized in that: The dual-purpose sitting and lying device further comprises a lower limb supporting portion (3) which can be flipped up and down relative to the front side of the seat portion (1); a lower limb driving mechanism (4) for driving the lower limb supporting portion (3) to flip up and down is provided between the seat portion (1) and the lower limb supporting portion (3).

4. The sitting and lying dual-purpose device according to claim 3, characterized in that: The lower limb supporting portion (3) comprises a frame portion (3A) and a flip portion (3B), wherein the frame portion (3A) is pivotally connected to the seat portion (1), and the flip portion (3B) is mounted on the frame portion (3A) and can flip relative to the frame portion (3A); the lower limb driving mechanism (4) is arranged between the seat portion (1) and the frame portion (3A).

5. The sitting and lying dual-purpose device according to claim 4, characterized in that: One of the front and rear sides of the turning portion (3B) is a planar structure, and the other is a mountain-shaped structure.

6. The sitting and lying dual-purpose device according to claim 3, characterized in that: The seat (1) is mounted on a base frame (6) and is in rolling or sliding engagement with the base frame (6) in a front-to-rear direction (X). A seat drive mechanism (7) is provided between the seat (1) and the base frame (6) for driving the seat (1) to move forward and backward.

7. The sitting and lying dual-purpose device according to claim 6, characterized in that: A backrest linkage mechanism (8) is provided between the seat portion (1) and the backrest portion (2), and the backrest linkage mechanism (8) is configured to: when the rear side of the seat portion (1) is located in a first area (L1), it is in a linkage obstruction state that restricts the seat portion (1) from driving the backrest portion (2) to flip, and when the rear side of the seat portion (1) is located in a second area (L2), it is in a linkage permission state that allows the seat portion (1) to drive the backrest portion (2) to flip; the second area (L2) is located on the front side of the first area (L1).

8. The sitting and lying dual-purpose device according to claim 7, characterized in that: The backrest linkage mechanism (8) comprises a seat connecting rod (8A), a backrest connecting rod (8B) and a base frame connecting rod (8C); the middle part of the seat connecting rod (8A) is pivotally connected to the seat (1), and its two ends are respectively pivotally connected to the first end of the backrest connecting rod (8B) and the first end of the base frame connecting rod (8C); the second end of the backrest connecting rod (8B) is pivotally connected to the backrest portion (2), and the second end of the base frame connecting rod (8C) is pivotally connected to the base frame; when the backrest linkage mechanism (8) changes from a linkage obstructed state to a linkage allowed state, the lower side included angle (a) of the seat connecting rod (8A) and the backrest connecting rod (8B) changes from greater than 180 degrees to less than 180 degrees.

9. The sitting and lying dual-purpose device according to claim 1, characterized in that: A massage mechanism is installed on the backrest (2).

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