TWM524665U - Seat with variable support angle - Google Patents

Description

Seat that can change the support angle

This new type is related to the seat, especially regarding the seat that can change the support angle.

The invention discloses a seat (massage chair) capable of changing a support angle, which mainly comprises a base frame and a main support body, the base frame is placed on the ground, and the main support body has a relative a fixed seat portion and a back of the chair, the left and right sides of the seat portion are provided with rollers, which can slide back and forth on the guide rails on the left and right sides of the base frame to form a reciprocating displacement along a straight track. a first reciprocating portion; further, a left and right yaw arms are disposed between the main support body and the base frame, and a bottom end of each yaw arm is pivotally connected to the base frame, and a top end of each yaw arm is pivotally connected to a bottom end of the front back of the chair forms a second reciprocating portion reciprocally displaceable along an arc track; a driving device (linear actuator such as an electric push rod, a pneumatic cylinder or an oil) is disposed between the yaw arm and the base frame The pressure cylinder is configured to push and pull the yaw arm such that the first reciprocating portion and the second reciprocating portion of the main support body are simultaneously displaced along respective reciprocating trajectories, thereby changing the overall position and the inclination angle of the main support body. When the main support body is displaced from the normal posture (Fig. 2 of the case) to the reclining posture (Fig. 1 of the case), the rear end of the seat back is substantially vertically lowered by the second reciprocating portion being appropriately displaced forward. It does not move backwards with the reclining action, so the space is not required to be reserved behind the seat (for example, between the walls) when the seat is initially placed. In the embodiment shown in FIG. 9, the seat further includes a calf support body pivotally connected to the front end of the seat portion of the main support body, and the calf support body and the base frame are disposed between the seat frame and the base frame. Another driving device is used to push and pull the aforementioned calf support to change the angle of the lower leg support relative to the aforementioned main support. Basically, in order to obtain better support comfort, when the main support body assumes a normal posture, the angle between the calf support surface of the calf support body and the buttock support surface of the seat portion is relatively small, and vice versa. When the support body is in the reclining posture, the angle between the aforementioned calf support surface and the aforementioned buttock support surface is It is bigger. The upper lifting seat uses two sets of driving devices to respectively control the angles of the main support body and the calf support body, and the cost is high.

The main purpose of the present invention is to provide a seat that can change the support angle, and the variable angle between the calf support surface and the buttock support surface automatically and instantaneously changes with the angle between the buttock support surface and the back support surface relative to the ground. And to the appropriate angle, no additional drive or adjustment action is required.

In order to achieve the above object, the seat for changing the support angle provided by the present invention comprises a base frame, a main support body and a lower leg support body. The main support body has a fixed seat portion and a seat back. The seat portion and the back of the chair are respectively provided with a buttock support surface for supporting the buttocks of the user and a back support surface for supporting the back of the user; the main support body is disposed on the base frame in a movable manner, which can be Displacement between the posture and a reclining posture; the forward elevation angle of the front end of the buttock support surface with respect to the rear end thereof is relatively small when the main support body assumes the aforementioned normal posture, when the main support body assumes the aforementioned reclining posture The calf support body is provided with a calf support surface for supporting the lower leg of the user, and the portion of the calf support body corresponding to the top end of the calf support surface is pivotally connected to the main support body corresponding to the aforementioned a portion of the front end of the buttock support surface; a connecting direction of the top and bottom ends of the calf support surface and a front and rear end of the buttock support surface The angle is less than 180 degrees; and the at least one linkage mechanism is disposed between the main support body and the calf support body. When the main support body assumes the normal posture, the calf support surface and the foregoing The aforementioned angle between the buttock support surfaces is relatively small, and when the main support body assumes the aforementioned reclining posture, the aforementioned angle between the calf support surface and the buttock support surface is relatively large.

According to a preferred embodiment of the present invention, each of the linkage mechanisms includes a driving rod and a connecting rod; the driving rod has a front end, a rear end and a sliding portion between the front and rear ends, and the driving The rear end of the rod is pivotally connected to a specific portion of the main support body, and is displaced from the rear to the front with respect to the base frame as the main support body is displaced from the normal posture to the reclining posture, and along with the foregoing main The support body is displaced from the reclining posture to the normal posture and displaced to the rear with respect to the base frame; the sliding portion is restricted to a pre-predetermined along the base frame The guide rail is disposed to slide between a rear end point and a front dead center; the connecting rod has a front end and a rear end, the rear end of the connecting rod is pivotally connected to the front end of the driving rod, and the front end of the connecting rod is pivotally connected In the aforementioned calf support body, and a portion of the aforementioned calf support body pivotally connected to the main support body at a predetermined distance.

10‧‧‧ pedestal

11‧‧‧ Chassis

12‧‧‧ side frame

13‧‧‧First rail

14‧‧‧Second rail

20‧‧‧Main support

21‧‧‧ Chair seat

22‧‧‧ chair back

23‧‧‧ shaft

24‧‧‧First wheel

25‧‧‧ axle pin

30‧‧‧ deflection arm

40‧‧‧ drive

41‧‧‧Motor set

42‧‧‧Slider

43‧‧‧ Slider

50‧‧‧Leg support

51‧‧‧ side arm

60‧‧‧ linkage agency

61‧‧‧Drive rod

62‧‧‧Second wheel

63‧‧‧Long slot

64‧‧‧

65‧‧‧ Connecting rod

70‧‧‧ stretching spring

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a seat of the preferred embodiment of the present invention in a normal position.

2 is a side elevational view of the seat of the preferred embodiment of the present invention in a normal position.

3 is a perspective view of the seat of the preferred embodiment of the present invention in a recline position.

4 is a side elevational view of the seat of the preferred embodiment of the present invention in a reclined position.

Figure 5 is a partial enlarged view of the vicinity of the left side driving rod in a preferred embodiment of the present invention.

Referring to FIG. 1 to FIG. 5, the seat of the preferred embodiment of the present invention mainly includes a base frame (10), a main support body (20) and a calf support body (50), wherein the base frame (10) It can be stably mounted on a support surface such as the ground or the floor, and has a chassis (11) substantially flush with the support surface, and left and right respectively fixedly attached to the left and right sides of the chassis (11). Two side frames (12), a top side of each side frame (12) is provided with a first rail (13) and a second rail (14) extending substantially forward and backward, wherein the first rail (13) is relatively high, The second rail (14) is relatively low, the front end of the first rail (13) is slightly higher than the rear end thereof, the front end of the second rail (14) is significantly higher than the rear end thereof, and the first side of the left and right sides The guide rails (13) are kept parallel, and the second rails (14) on the left and right sides are maintained in parallel.

The main support body (20) has a seat portion (21) and a seat back (22) which are relatively fixed. In the figure, only two rectangular frames which are schematically fixed in an L shape are used to express the seat portion. (21) and the backbone portion of the back (22) of the chair. In fact, the seat portion (21) is provided with at least a buttock support surface (not shown) for supporting the buttocks of the user, and at least the back (22) of the seat back (22) There is also a back support surface (not shown) for supporting the back of the user, and the portion of the seat portion (21) corresponding to the rear end of the buttock support surface and the back of the seat (22) corresponding to the back support surface The ends are rigidly connected. The buttock support surface and the back support surface are not normally flat in practice and may be softly deformed (for example, using foam or rubber, etc.), but roughly, the joint direction bases of the front and rear ends of the buttock support surface The present invention corresponds to the extending direction of the side surface of the seat portion (21) shown in FIG. 2 and FIG. 4, and the connecting directions of the top and bottom ends of the back supporting surface substantially correspond to those shown in FIGS. 2 and 4. The extension of the side of the frame back (22) frame. In the present embodiment, the angle between the joining direction of the front and rear ends of the buttock support surface and the joining direction of the top and bottom ends of the back support surface is maintained at substantially 127 degrees. If the present invention is applied to a massage chair, the chair back (22) and the seat portion (21) may be provided with a massage device (not shown) for massaging the back, shoulders, buttocks, thighs and the like of the user. In another embodiment of the present invention, the main support body (20) further includes left and right sides respectively fixed to the seat portion (21) for the user to place the left and right sides of the hands thereof. An armrest portion (not shown) and possibly a massage device for massaging the user's arm.

The front main body (20) and the base frame (10) further have left and right yaw arms (30), and the bottom ends of the yaw arms (30) are pivotally connected to the base frame according to the axis in the left-right direction ( 10) The rear end of the chassis (11), and the bottom ends of the left and right yaw arms (30) form a common axis. The top end of each yaw arm (30) is pivotally connected to the connection (handover) of the seat portion (21) of the main support body (20) and the seat back (22) in the left-right direction axis, and the left and right yaws are The tips of the arms (30) form a common axis. On the other hand, the intermediate front and rear positions of the left and right sides of the seat portion (21) of the main support body (20) are each fixed with a shaft (23) corresponding to the left and right axial directions, and the left and right two shafts are respectively (23) Form a common axis. The outer ends of the shafts (23) are coaxially pivotally connected to a first roller (24), and the left and right first rollers (24) are respectively fitted to the left and right first guide rails (13) of the base (10). And can roll along the first rail (13), in other words, the portion of the main support body (20) corresponding to the shaft (23) can be displaced back and forth along the extending direction of the first rail (13) of the base frame (10), And it is possible to deflect relative to the base frame (10) with the aforementioned shaft (23) as an axis.

Thereby, a portion of the main support body (20) corresponding to the top end of the yaw arm (30) forms a first reciprocating portion, and can be along a circular arc-shaped reciprocating track with the bottom end of the yaw arm (30) as an axis. (hereinafter referred to as a first reciprocating trajectory, not shown) reciprocally displaced relative to the aforementioned base frame (10), for example, the tip end position of the yaw arm (30) shown in FIG. 2 corresponds to one end of the aforementioned first reciprocating trajectory ( Hereinafter, the first position is referred to, and the tip end position of the yaw arm (30) shown in FIG. 4 corresponds to the other end of the first reciprocating trajectory (hereinafter referred to as the second position), and in terms of the first reciprocating trajectory, the foregoing After a position is relatively offset, the aforementioned second position is relatively forward. A portion of the main support body (20) corresponding to the shaft (23) forms a second reciprocating portion along a linear reciprocating trajectory corresponding to the extending direction of the guide rail (13) (hereinafter referred to as a second reciprocating trajectory, Reciprocating displacement relative to the aforementioned pedestal (10), such as the first roll shown in FIG. The position of the wheel (24) corresponds to one end of the aforementioned second reciprocating trajectory (hereinafter referred to as a third position), and the position of the first roller (24) shown in FIG. 4 corresponds to the other end of the aforementioned second reciprocating trajectory (hereinafter referred to as In the fourth position), in the second reciprocating trajectory, after the third position is relatively offset, the fourth position is relatively forward. In another embodiment of the present invention, the first reciprocating portion of the main support body (20) is set at an intermediate height or a slightly lower position of the aforementioned seat back (22). Of course, the first reciprocating portion of the main support body (20) does not have to regulate its displacement trajectory in the manner of a yaw arm. For example, in other possible embodiments, the first reciprocating portion may also be provided with a roller and along the pedestal ( 10) The preset shaped guide rail slides back and forth.

As shown in FIG. 2, when the first reciprocating portion of the main support body (20) is in the aforementioned first position, the second reciprocating portion of the main support body (20) corresponds to the third position, and the main support body (20) Correspondingly, a normal posture is presented; as shown in FIG. 4, when the first reciprocating portion of the main support body (20) is in the second position, the second reciprocating portion of the main support body (20) corresponds to the fourth position. And the main support body (20) correspondingly presents a reclining posture. The forward elevation angle of the front end of the buttock support surface with respect to the rear end thereof is relatively small when the main support body (20) assumes the aforementioned normal posture (about 1 degree in this example), and the front support is presented on the main support body (20). The posture is relatively large (about 16 degrees in this example); correspondingly, the rearward elevation angle of the top end of the back support surface with respect to the bottom end thereof is relatively large when the main support body (20) assumes the aforementioned normal posture (this example) It is about 52 degrees) and is relatively small when the main support body (20) assumes the aforementioned reclining posture (this example is about 37 degrees).

A driving device (40) is disposed between the yaw arm (30) and the base frame (10). The embodiment uses an electric push rod in the prior art, and includes a motor unit (41) and a sliding rod (42). And a slider (43), wherein the motor group (41) is assembled at a rear end of the slider (42) to drive a screw (not shown) hidden inside the slider (42), At the same time, the outer casing of the motor unit (41) is pivotally connected between the top and bottom ends of the yaw arm (30) according to the axis in the left-right direction; the slider (43) is slidably sleeved on the sliding bar (42). And being screwed through by the aforementioned screw, and at the same time, the slider (43) is pivotally connected to the central position of the approximate chassis (11) of the base frame (10) according to the axis in the left-right direction; thereby, when the motor group (41) is driven In the foregoing screw, since the slider (43) and the slide bar (42) must slide relative to each other, that is, the distance between the two pivot points of the electric push rod is pushed away or pulled closer, the yaw arm (30) is pushed and pulled. The pendulum indirectly drives the main support body (20) to move relative to the base frame (10); when the motor group (41) stops operating in a timely manner, the main support body (20) can be positioned in the aforementioned normal posture, the aforementioned reclining posture, or Is the aforementioned two postures Predetermined position. An electric push rod similar to the above structure may also be directly connected between the main support body (20) and the base frame (10) to achieve a phase The same purpose.

The calf support body (50) is similarly schematically represented by a rectangular frame in the figure. In fact, the calf support body (50) is provided with at least one calf support surface for supporting the user's lower leg ( Not shown in the drawings, the joining directions of the top and bottom ends of the calf support surface substantially correspond to the extending direction of the side surface of the calf support (50) shown in Figs. 2 and 4 . The portion of the calf support body (50) corresponding to the tip end of the calf support surface is pivotally connected to the front end of the main support body (20) corresponding to the front end of the buttock support surface in the left-right direction axis. In the present embodiment, the calf support body (50) having left and right side arms (51), the top ends of the two side arms (51) are respectively pivotally connected to the left and right sides of the front end of the frame portion of the seat portion (21), so that the calf support body (50) The angle relative to the main support (20) can vary. The angle between the connecting direction of the top and bottom ends of the calf support surface and the connecting direction of the front and rear ends of the buttock support surface is less than 180 degrees. If the present invention is applied to a massage chair, the calf support (50) may be provided with a massage device (not shown) for massaging the lower leg of the user, and further, the bottom end of the calf support (50) may be fixedly or actively. Connect a foot support (not shown).

A left and right linkage mechanism (60) is disposed between the main support body (20) and the calf support body (50), and the two linkage mechanisms (60) have the same structure (symmetry), and each includes a driving rod (61). And a connecting rod (65), the driving rod (61) has a front end and a rear end, and the rear end of the driving rod (61) is pivotally connected to the seat portion of the main supporting body (20) according to the axis in the left-right direction ( 21) A shaft pin (25) corresponding to the side preset (Note: regarding the pivotal structure between the rear end of the driving rod (61) and the aforementioned shaft pin (25), which will be further described later), the aforementioned pin (25) The fixing position is at a predetermined position behind the aforementioned shaft (23) of the main support body (20), so that the rear end of the driving rod (61) is displaced from the normal posture to the aforementioned reclining posture according to the normal posture (20). It is displaced from the rear to the front with respect to the base frame (10), and is displaced backward and backward with respect to the base frame (10) as the main support body (20) is displaced from the aforementioned reclining posture to the aforementioned normal posture. A second roller (62) is disposed between the front and rear ends of the driving rod (61), and the second roller (62) is fitted to the second rail (14) on the corresponding side of the base (10), and can Rolling along the second rail (14), so that the portion of the driving rod (61) corresponding to the second roller (14) forms a sliding portion, which is restricted to be along the second rail (14) at a rear end point (as shown in the figure). Sliding between the position shown in 2) and a front dead center (as shown in Figure 4). The connecting rod (65) has a front end and a rear end. The rear end of the connecting rod (65) is pivotally connected to the front end of the driving rod (61) according to the axis in the left-right direction, and the front end of the connecting rod (65) is in the left-right direction. The axis is pivotally connected to the aforementioned calf branch The side of the support (50) is pivotally connected to the portion of the main support (20) (i.e., the top end of the side arm (51)) at a predetermined distance from the lower leg support (50). Thereby, when the main support body (20) is displaced between the normal posture and the reclining posture, the left and right axle pins (25) drive the left and right two belts (61). The rear end displacement of the rear end corresponds to any position within the possible range of movement of the driving rod (61), and the sliding portion and the front end of the driving rod (61) are respectively located at respective corresponding positions, so that the connection is A link (65) between the front end of the rod (61) and the aforementioned calf support (50) supports the calf support (50) at a unique corresponding angle.

As shown in FIG. 2 and FIG. 4, when the main support body (20) assumes the normal posture, the aforementioned angle between the calf support surface and the buttock support surface is relatively small (FIG. 2 and FIG. 4). In this case, the relationship is about 97 degrees. When the main support body (20) assumes the reclining posture, the angle between the calf support surface and the buttock support surface is relatively large (about 135 degrees in this example). Ergonomics provide better support comfort.

Referring to FIG. 5, in the embodiment, the position of the shaft pin (25) of the main support body (20) pivotally connected to the rear end of the driving rod (61) is not fixed, but (when sufficient external force is applied) The relative displacement, in detail, the rear end of the driving rod (61) is provided with a long slot (63), and the length direction of the long slot (63) corresponds to the length direction of the driving rod (61) itself. The driving rod (61) is actually sleeved with the aforementioned shaft pin (25) by the long slot (63), so that the driving rod (61) and the shaft pin (25) can slide relative to each other along the long slot (63) and can The shaft pin (25) is a relative deflection of the shaft, and at the same time, a protruding pin (64) is preset at a position intermediate between the length of the shaft pin (25) and the driving rod (61) (that is, a position further forward than the long slot (63)). A tension spring (70) is connected between the above, and the tension spring (70) is normally contracted to the shortest length, so that the shaft pin (25) is relatively maintained at the front end of the long slot (63) (see Figures 2, 4, 5). In other words, the driving rod (61) is normally pivoted at the position of the front end of the long slot (63) at the position of the pivot pin (25) of the main support body (20), so that the linkage mechanism (60) is substantially maintained. The component relationship shown in the figure exerts the aforementioned interlocking function. Further, with such a configuration, in the process in which the driving mechanism (40) drives the main support body (20) to return to the normal posture from the reclining posture, if a person or a pet is accidentally caught in the calf support body (20) Between the back surface and the front end surface of the base frame (10), the main support body (20) is continuously displaced even if it is driven, but the tension spring (70) is blocked because the calf support body (20) is hindered in the displacement direction. Correspondingly, the shaft pin (25) of the main support body (20) is opposite to the long slot (63) of the driving rod (61), in other words, the driving rod (61) does not follow the main supporting body at this time. (20) Activity, so the calf support (50) will not be forced back through the connecting rod (65) Pull back to avoid or reduce the damage. Of course, if the above safety mechanism is not considered, the driving rod (61) of the linkage mechanism (60) can directly pivot a fixed position of the rear end thereof to a specific portion of the main support body (20) (for example, the aforementioned axle pin (25). The basic function of interlocking the main support (20) with the calf support (50) is achieved by the position or other suitable position.

In another embodiment of the present invention, a set of the aforementioned linkage mechanisms may be provided only at the intermediate position of the width of the seat or on one of the sides (left or right).

The present invention can also be applied to a seat that manually adjusts the seat angle, and is not limited to use in an electric chair.

10‧‧‧ pedestal

11‧‧‧ Chassis

12‧‧‧ side frame

13‧‧‧First rail

14‧‧‧Second rail

20‧‧‧Main support

21‧‧‧ Chair seat

22‧‧‧ chair back

24‧‧‧First wheel

30‧‧‧ deflection arm

40‧‧‧ drive

41‧‧‧Motor set

42‧‧‧Slider

43‧‧‧ Slider

50‧‧‧Leg support

51‧‧‧ side arm

60‧‧‧ linkage agency

61‧‧‧Drive rod

62‧‧‧Second wheel

64‧‧‧

65‧‧‧ Connecting rod

Claims (7)

A seat capable of changing a support angle comprises: a base frame; a main support body having a relatively fixed seat portion, a chair back and a specific portion, wherein the seat portion is provided with a support for the user's buttocks The buttock support surface, the back of the chair is provided with a back support surface for supporting the back of the user; the main support body is disposed on the base frame in a movable manner, and is displaceable between a normal posture and a reclining posture. The front elevation angle of the front end of the buttock support surface with respect to the rear end thereof is relatively small when the main support body assumes the normal posture, and is relatively large when the main support body assumes the reclining posture; the specific portion will follow The main support body is displaced from the normal posture to the reclining posture and displaced from the rear to the front with respect to the base frame, and is displaced relative to the base frame as the main support body is displaced from the reclining posture to the normal posture. Displaced from the rear; a calf support body is provided with a calf support surface for supporting the lower leg of the user, and the calf support body corresponds to the top of the calf support surface a portion pivotally connected to a front end of the main support body corresponding to the front end of the buttock support surface according to a left-right axis; an angle between a top end and a bottom end of the calf support surface and an angle of a front end and a rear end of the buttock support surface The at least one linkage mechanism is disposed between the main support body and the calf support body, and each of the linkage mechanisms includes a driving rod and a connecting rod; the driving rod has a front end and a rear end. a sliding portion between the front and rear ends, the rear end of the driving rod is pivotally connected to the specific portion of the main supporting body, and the sliding portion is restricted to be along a predetermined guide rail of the base frame Sliding between a dead point and a front dead center; the connecting rod has a front end and a rear end, the rear end of the connecting rod is pivotally connected to the front end of the driving rod, and the front end of the connecting rod is pivotally connected to the calf support body And a predetermined distance from the portion of the main support body pivotally connected to the calf support body; and by the linkage mechanism, when the main support body assumes the normal posture, the calf support The angle between the support surface and the hips are relatively small, the current of said main support body presenting the supine posture, the angle between the calf support surface and the support surface is relatively large buttocks. a seat of claim 1 which can change a support angle, wherein the aforementioned specificity of the aforementioned main support body The position corresponding position is between the front end and the rear end of the seat portion. The seat of claim 1 , wherein the left side and the right side of the seat are respectively provided with the aforementioned linkage mechanism, and the two linkage mechanisms have the same structure. The seat of claim 1, wherein the main support body has a first reciprocating portion and a second reciprocating portion fixed to the seat portion and the seat back, and the first reciprocating portion is restricted. The second reciprocating portion is constrained to be adjacent to the pedestal relative to the pedestal relative to the aforementioned pedestal relative to the foregoing pedestal along a first reciprocating trajectory that is displaced between a relatively rearward first position and a relatively forward second position The second reciprocating track is displaced between a relatively rearward third position and a relatively forward fourth position; when the first reciprocating portion is in the first position, the second reciprocating portion corresponds to the third position And the main support body correspondingly presents the normal posture; when the first reciprocating portion is in the second position, the second reciprocating portion corresponds to the fourth position, and the main support body correspondingly assumes the reclining posture. The seat of claim 4, wherein the first reciprocating portion of the main support body is located near the bottom end of the front seat back, and the second reciprocating portion of the main support body is corresponding to the seat Between the front end and the back end of the department. A seat capable of changing a support angle according to claim 1, further comprising a driving device for driving the main support body to be displaced between the aforementioned normal posture and the aforementioned reclining posture. The seat of claim 6, wherein the specific portion of the main support body is provided with at least one axle pin; the rear end of each of the linkage mechanisms of the linkage mechanism is provided with a long slot, and the linkage rod is The long slot is sleeved with the shaft pin, and a tension spring is coupled between a predetermined portion in front of the long slot of the linkage rod and the shaft pin.