A lifting chair

Abstract

The present invention discloses a lifting chair, comprising a seat body, a first lifting frame, a second lifting frame, a driving mechanism and a mounting base for supporting the first lifting frame and the second lifting frame, wherein the seat body is arranged on the first lifting frame and the second lifting frame, and the first lifting frame and the second lifting frame are synchronously lifted and lowered under the driving of the driving mechanism, so that the seat body can also be displaced in the front-to-back direction of the seat body while the seat body is lifted and lowered. By arranging the first lifting frame and the second lifting frame that are lifted and lowered synchronously, the present invention can realize the alternate lifting and lowering of the lifting chair while also being displaced in the front-to-back direction of the seat body, thereby enriching the use function of the lifting chair with a simple structure and improving the safety and stability of the lifting chair.

Description

Technical Field

[0001] The invention relates to baby products, in particular to a lifting chair. Background Art

[0002] As a kind of game equipment, the lifting chair brings leisure and entertainment experience to users, and is becoming more and more popular among people, especially in the field of childcare, and has become a must-have equipment for parents in the process of parenting. Most of the existing lifting chairs do not have the automatic rocking function. When parents interact with their children, they can only give their children the experience of the lifting chair manually, which brings physical burden to parents. In addition, some lifting chairs currently on the market use electric swing drive mechanisms to achieve alternating rise and fall, and the angle of the seat and the back relative to the support surface does not change. During the rise and fall process, the seat body does not move relative to the support surface, and the function is single. Some lifting chairs have structures that can change the distance of the seat body relative to the support surface, but the angle of the seat and the back changes, which cannot meet people's higher needs. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a lifting chair in which the seat body can maintain the angle with the support surface during the rising and falling process, and the seat body can be displaced in the front and rear direction of the seat body. The lifting chair is low in cost, easy to carry, novel in design, and simple and effective in structure.

[0004] The present invention is achieved through the following technical solutions:

[0005] A lifting chair comprises a seat body, a first lifting frame, a second lifting frame, a driving mechanism and a mounting base for supporting the first lifting frame and the second lifting frame, wherein the seat body is arranged on the first lifting frame and the second lifting frame, and the first lifting frame and the second lifting frame are synchronously lifted and lowered under the drive of the driving mechanism.

[0006] By synchronously driving the two lifting frames through the driving mechanism, the seat body is alternately raised or lowered while ensuring that the angle of the seat body relative to the supporting surface (i.e. the mounting surface of the mounting base) does not change.

[0007] As a further optimization of the above technical solution, the first lifting frame includes a first swinging member, a first rotating member, and a first pivot shaft, the first swinging member and the first rotating member are pivotally connected through the first pivot shaft, the first rotating member is transferred to the mounting base, and the first swinging member is provided with a first moving part;

[0008] The second lifting frame includes a second swinging member, a second rotating member, and a second pivot shaft, the second swinging member and the second rotating member are pivotally connected via the second pivot shaft, the second rotating member is transferred to the mounting base, and the second swinging member is provided with a second moving part;

[0009] The driving mechanism includes a motor, a rotating member, a motor output shaft and a driving member, wherein the rotating member is fixedly connected to the motor output shaft, one end of the driving member is pivotally connected to the rotating member, and the pivotal rotation point deviates from the fixed connection point between the rotating member and the motor output shaft, and the other end of the driving member is connected to the first swinging member and the second swinging member.

[0010] The first rotating member, the second rotating member, the first swinging member and the second swinging member constitute a four-bar linkage, and the driving member drives the two swinging members to drive the first moving part provided on the first rotating member and the second moving part provided on the second rotating member to move on the mounting base. Since the swinging member and the rotating member are pivotally connected, the two lifting frames can realize synchronous opening and closing motion under the drive of the driving mechanism, thereby realizing the alternating lifting or lowering of the seat body, and at the same time, the angle of the seat body relative to the mounting base does not change relatively.

[0011] As a further optimization of the above technical solution, the lifting chair also includes a seat support seat, one end of which is fixedly connected to the seat body, and the other end is connected to the first pivot axis of the first lifting frame and the second pivot axis of the second lifting frame.

[0012] During the raising or lowering process of the two lifting frames, the relative distance between the first pivot axis and the second pivot axis does not change.

[0013] Specifically, in order to ensure that the relative distance between the two pivot axes does not change during the use of the lifting chair, the two lifting frames can be symmetrically arranged, or the pivoting range between the swing member and the rotating member or the length of the swing member and / or the rotating member can be adjusted.

[0014] As a preferred embodiment, the lifting chair further comprises a seat body swing mechanism, and the seat body swing mechanism drives the seat body to move along the front-back direction of the seat body. Further, the seat body swing mechanism comprises:

[0015] A swing support member, pivotally connected to the mounting base and the seat body;

[0016] A swing base, pivotally connected to the first pivot axis and the second pivot axis;

[0017] The rotating seat is fixedly connected to the seat body and is also pivotally connected to the swing base.

[0018] The arrangement of the seat body swing mechanism enables the seat body to not only be alternately raised and lowered, but also to move in the front-rear direction relative to the seat body, thus enriching the use functions of the lifting chair.

[0019] As a preferred embodiment, the lifting chair further includes a lifting limit mechanism, and the lifting limit mechanism limits the opening and closing angles of the first lifting frame and the second lifting frame.

[0020] Indeed, the lifting limit mechanism can be arranged on the mounting base. For example, the lifting limit mechanism can be an abutment member, which abuts against the swinging members or rotating members of the first lifting frame and the second lifting frame to limit the descending height and control the opening and closing angles of the two lifting frames when the seat body descends.

[0021] As another embodiment, the lifting and limiting mechanism is pivotally connected to the first lifting frame or the second lifting frame, and the lifting and limiting mechanism includes:

[0022] a pivot rod pivotally connected to the first rotating member or the second rotating member;

[0023] a pivot rod pivotally connected to the first swing member or the second swing member;

[0024] The two pivot rods are pivotally connected, wherein at least one of the pivot rods is provided with a protrusion, and the protrusion limits the two pivot rods to be arranged at an angle when the seat body descends.

[0025] Because the lifting and lowering limit mechanism is pivotally connected to the lifting frame, when the lifting frame drives the seat body to descend, the two pivot rods will pivot and open accordingly. Due to the setting of the protruding portion, the two pivot rods are limited to be set at an angle, and a stable quadrilateral structure is formed between the two pivot rods and the swinging parts and rotating parts of the corresponding lifting frame to prevent gravity from directly acting on the driving mechanism. At the same time, when the lifting frame drives the seat body to rise, there is no upward resistance to the seat body.

[0026] As a preferred embodiment, a limiting member is provided on the first rotating member and / or the second rotating member, and the limiting member limits the seat body to move in the left-right direction of the mounting base, that is, limits the seat body to move in the axial direction of the two pivot axes.

[0027] Specifically, the limiting member is a bearing pivotally connected to the first rotating member and / or the second rotating member.

[0028] As a further optimization of the above technical solution, a support seat supporting the first movable part and the second movable part is also provided on the mounting base, and the supporting surface of the support seat is a concave arc surface or a high and low inclined surface, and the high and low inclined surface is inclined and lowered toward the transition point between the first rotating part and the second rotating part.

[0029] The supporting surface is a high and low inclined surface or an inner concave arc surface, so that when the seat body rises, that is, the two moving parts move from the high position to the low position of the supporting surface, at this time, the distance between the two moving parts and the transfer points where the two rotating members are transferred to the mounting base gradually becomes smaller (that is, the opening and closing angles of the two lifting frames gradually become smaller), and the inclined and lowered inclined surface makes the movement of the two moving parts less laborious; when the seat body descends, that is, the two moving parts move from the low position to the high position of the supporting surface, at this time, the distance between the two moving parts and the transfer points where the two rotating members are transferred to the mounting base gradually becomes larger (that is, the opening and closing angles of the two lifting frames gradually become larger), and the two moving parts are subjected to the resistance of the gradually rising inclined surface during the movement process, slowing down the descending speed of the seat body, thereby ensuring the uniform movement of the seat body during the entire lifting movement process.

[0030] As a further optimization of the above technical solution, the motor is arranged at an end of the mounting base away from the first pivot axis and the second pivot axis. This arrangement can make the driving of the motor more labor-saving.

[0031] Specifically, the first moving part and the second moving part may be wheels or bearings, as long as they can move along the high and low inclined surfaces or the concave arc surfaces under the drive of the driving mechanism.

[0032] In summary, the present invention adopts a simple synchronous lifting frame structure, which makes it easy for the lifting chair to be alternately raised and lowered while maintaining the inclination angle of the seat body unchanged, that is, the angle relative to the supporting surface does not change relative to each other, thereby enriching the performance of the lifting chair.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] 1) The present invention provides a first lifting frame and a second lifting frame which are driven by a driving mechanism to perform synchronous lifting, so that the seat body moves a distance in the front-rear direction relative to the support surface while rising and lowering, while keeping the angle of the seat body relative to the support surface unchanged, thereby ensuring the stability of the lifting chair during use, eliminating the instability factor of the lifting chair in the prior art when the angle of the seat body relative to the mounting base changes, and improving the comfort and safety of the lifting chair.

[0035] 2) The lifting chair of the present invention is provided with a lifting limit mechanism so that the lifting frame forms a stable quadrilateral structure with the lifting limit mechanism during the descent process, so that the gravity of the seat body will not directly act on the driving mechanism, thereby extending the service life of the driving mechanism and improving the use efficiency of the lifting chair.

[0036] 3) The lifting chair of the present invention can ensure that the lifting chair can be raised and lowered at a uniform speed by providing a high and low inclined surface or an inner concave arc surface supporting the moving part of the lifting frame.

[0037] 4) The lifting chair of the present invention is provided with a driving mechanism powered by a motor to drive the first lifting frame and the second lifting frame connected to the driving member at the bottom to synchronously and continuously reciprocate, so that the seat body is alternately raised and lowered, which saves labor and has low power cost. The driving mechanism has a simple structure and is not easy to damage. At the same time, the required power supply voltage is low, and only 6V voltage is needed to achieve it. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0039] Figure 2 It is a structural schematic diagram of the mounting base, the first lifting frame, the second lifting frame and the driving mechanism of the present invention.

[0040] Figure 3 It is a structural schematic diagram of the first lifting frame, the second lifting frame and the lifting limit mechanism of the present invention.

[0041] Figure 4 It is a schematic diagram of a limiting member of the present invention.

[0042] Figure 5 It is a schematic diagram of the lifting frame structure from a top-down perspective. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, outside, inside...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] like Figure 1 As shown, a lifting chair includes a seat body 2, a first lifting frame, a second lifting frame, a seat body swinging mechanism, a driving mechanism 9 and a mounting base 1 for supporting the first lifting frame and the second lifting frame; the driving mechanism drives the first lifting frame and the second lifting frame to rise and fall synchronously, and a lifting limit mechanism 8 is also pivotally connected to the second lifting frame.

[0046] Specifically, Figure 1As shown in the figure, the seat body swing mechanism includes: a rotating seat 14 fixedly connected to the seat body 2, a swing base 15 pivotally connected to the first pivot axis and the second pivot axis, and a swing support 13 pivotally connected to the seat body 2 and the mounting base 1, and the swing base 15 is pivotally connected to the rotating seat 14.

[0047] Specifically, Figure 1-2 As shown in the figure, the mounting base 1 is provided with supporting side plates 11 arranged in parallel.

[0048] The first lifting frame includes a first swinging member 7, a first rotating member 6 and a first pivot shaft. The first swinging member 7 is connected to the first rotating member 6 via the first pivot shaft. The first rotating member 6 is connected to the supporting side plate 11. The first swinging member 7 is provided with a first moving part.

[0049] The second lifting frame includes a second swinging member 5, a second rotating member 4 and a second pivot shaft. The second swinging member 5 is connected to the second rotating member 4 through the second pivot shaft. The second rotating member 4 is connected to the supporting side plate 11. The second swinging member 5 is provided with a second moving part.

[0050] The relative distance between the first pivot axis and the second pivot axis remains unchanged during the process of the two lifting frames being raised and lowered.

[0051] The driving mechanism 9 includes a motor 91, a rotating member 92, a motor output shaft and a driving member 93. The rotating member 92 is pivotally connected to the motor output shaft. One end of the driving member 93 pivots with the rotating member 92, and the other end of the driving member 93 is connected to the first swinging member 7 and the second swinging member 5.

[0052] The mounting base 1 is also provided with a support seat for supporting the first moving part and the second moving part. Figure 2 As shown, the support surface of the support seat is provided with high and low inclined surfaces, and the first movable part and the second movable part are specifically wheels. The wheels move along the high and low inclined surfaces, and the high and low inclined surfaces are inclined downward toward the two rotating parts, that is, the lower end of the inclined surface is close to the transfer point.

[0053] Specifically, there are two first swing members 7 and they are symmetrically arranged, and one end of the two first swing members 7 is fixedly connected by a cross bar. There are also two second swing members 5 and they are symmetrically arranged, and one end of the two second swing members 5 is also fixedly connected by another cross bar, and the first swing member 7 and the second swing member 5 are fixedly connected by a connecting rod. In order to simplify the mechanical structure, in this embodiment, the second swing member 5 has the same structure as the first swing member 7.

[0054] There are two first rotating members 6 and they are symmetrically arranged. One end of the two first rotating members 6 is pivotally connected to the mounting base 1 for rotation, and the other end is pivotally connected to the other end of the two first swinging members 7 for rotation. There are also two second rotating members 4 and they are symmetrically arranged. One end of the two second rotating members 4 is pivotally connected to the mounting base 1, and the other end is pivotally connected to the other end of the two second swinging members 5 for rotation. As mentioned above, similarly, the first rotating member 6 and the second rotating member 4 have the same structure.

[0055] The first swing member 7 and the second swing member 5 are configured as components of the same shape, and the first rotating member 6 and the second rotating member 4 are configured as components of the same shape. The first swing member 7 and the second rotating member 4 have the same vertical distance, and the first rotating member 6 and the second swing member 5 have the same vertical distance. The first lifting frame and the second lifting frame have the same structure and are symmetrically arranged, which not only improves the stability of the lifting frame, but also further ensures that the angle of the seat body does not change during the lifting process.

[0056] In combination with the above structure, a parallel four-bar linkage is formed between the first and second swing members and the first and second rotating members, thereby ensuring that the relative distance between the two pivot axes does not change.

[0057] See also Figure 2 The rotating member 92 is fixedly connected to the motor output shaft, and one end of the rotating member 92 and the driving member 93 are pivotally connected and rotated. The rotation point of the pivotal rotation deviates from the fixed connection point between the motor output shaft and the rotating member 92, and the other end of the driving member 93 is pivotally connected and rotated with the cross bar of the second lifting frame.

[0058] For example Figure 2-3 As shown in the figure, the lifting and limiting mechanism 8 includes two pivoting rods 81 pivoted to each other, one of which is pivoted to the second rotating member 4, and the other is pivoted to the second swinging member 5. At the same time, a protrusion 82 is also provided on the two pivoting rods. The protrusion 82 enables the second lifting frame and the lifting and limiting mechanism 8 pivoted thereon to form a quadrilateral structure when the seat body 2 is lowered along with the lifting frame, that is, the protrusion 82 on this pivoting rod 81 abuts against the other pivoting rod 81, thereby limiting the maximum angle between the second swinging member 5 of the second lifting frame and the second rotating member 4. The formed quadrilateral structure avoids the gravity from being transmitted to the driving mechanism 9 when the seat body is lowered, thereby increasing the service life of the driving mechanism 9, and because the second swinging member 5 of the second lifting frame is arranged at an angle with the second rotating member 4, there is no resistance when the driving mechanism 9 drives the seat body 2 to rise.

[0059] For example Figure 4 The first rotating member 6 and the second rotating member 4 are pivotally connected with a limiting member 10, which is specifically a bearing, and the bearing contacts the supporting side plate 11 of the mounting base 1 (see Figure 4-5 ), thereby limiting the seat body 2 from moving in the left-right direction (ie, not moving along the axial direction of the pivot axis).

[0060] In this embodiment, the motor is arranged at one end of the mounting base 1 away from the two pivot shafts, that is, close to the two rotating parts, thereby generating a torque, thereby further saving the power output of the motor.

[0061] When the lifting chair is in use, when the motor drives the rotating member 92 to rotate continuously, the driving member 93 drives the second swinging member 5, and the second swinging member 5 drives the first swinging member 7, thereby driving the first moving part and the second moving part to move along the high and low slopes. The relative distance between the two moving parts and the transfer points where the two rotating members are connected on the supporting side plates 11 changes, and due to the effect of the high and low slopes, when the seat body 2 rises, that is, when the moving part moves toward the lower end along the high and low slopes, there is no resistance to the movement of the moving part; when the seat body 2 descends, that is, when the moving part moves toward the high end along the high and low slopes, the slope resistance slows down the descending speed of the seat body 2, thereby ensuring the uniform speed of the lifting chair during the lifting process; in addition, during the lifting process, the seat body 2 can also rotate along the front and rear directions of the seat body under the influence of the seat body swinging mechanism.

[0062] The lifting chair provided by the present invention can not only be raised and lowered alternately, but also can produce a forward and backward displacement along the moving direction of the moving part relative to the mounting base, and the relative distance between the two pivot shafts does not change during the lifting process, and the angle between the seat body pivoted on the two pivot shafts and the mounting base does not change. While the lifting chair is lifted and lowered at a constant speed, it can also produce a displacement along the forward and backward direction of the seat body, and at the same time, the angle of the seat body relative to the mounting base does not change. Compared with the lifting chairs of the prior art, the lifting chair has more complete functions, more stable performance, and higher safety in use.

[0063] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto without departing from the scope of the present invention and the present invention may be implemented in other ways that are equivalent or well known to those skilled in the art. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A lifting chair, characterized in that: The invention comprises a seat body, a first lifting frame, a second lifting frame, a driving mechanism and a mounting base for supporting the first lifting frame and the second lifting frame, wherein the seat body is arranged on the first lifting frame and the second lifting frame, and the first lifting frame and the second lifting frame are synchronously lifted and lowered under the driving of the driving mechanism; The first lifting frame comprises a first swinging member, a first rotating member, and a first pivot axis, the first swinging member and the first rotating member are pivotally connected through the first pivot axis, the first rotating member is transferred to the mounting base, and the first swinging member is provided with a first moving part; the second lifting frame comprises a second swinging member, a second rotating member, and a second pivot axis, the second swinging member and the second rotating member are pivotally connected through the second pivot axis, the second rotating member is transferred to the mounting base, and the second swinging member is provided with a second moving part; the mounting base is also provided with a supporting seat supporting the first moving part and the second moving part, the first moving part and the second moving part move on the supporting seat of the mounting base, the supporting surface of the supporting seat is an inner concave arc surface or a high and low inclined surface, and the high and low inclined surface is inclined and lowered in the direction toward the first rotating member and the second rotating member; while the seat body is lifted and lowered, the seat body can also generate displacement in the front and rear directions of the seat body; The driving mechanism includes a motor, a rotating member, a motor output shaft and a driving member, wherein the rotating member is fixedly connected to the motor output shaft, one end of the driving member is pivotally connected to the rotating member, and the pivotal rotation point deviates from the fixed connection point between the rotating member and the motor output shaft, and the other end of the driving member is connected to the first swinging member and the second swinging member.

2. The lifting chair according to claim 1, characterized in that: It also includes a seat body support seat, one end of which is fixedly connected to the seat body, and the other end of which is connected to the first pivot axis of the first lifting frame and the second pivot axis of the second lifting frame.

3. The lifting chair according to claim 1, characterized in that: It also includes a seat body swinging mechanism, which drives the seat body to rotate along the front and rear directions of the seat body.

4. The lifting chair according to claim 3, characterized in that: The seat body swing mechanism comprises: A swing support member, pivotally connected to the mounting base and the seat body; A swing base, pivotally connected to the first pivot axis and the second pivot axis; The rotating seat is fixedly connected to the seat body and is also pivotally connected to the swing base.

5. The chair lift according to any one of claims 1 to 4, characterized in that: A lifting and limiting mechanism is also included, and the lifting and limiting mechanism limits the opening and closing angles of the first lifting frame and the second lifting frame.

6. The lifting chair according to claim 5, characterized in that: The lifting and limiting mechanism is pivotally connected to the first lifting frame or the second lifting frame, and the lifting and limiting mechanism includes: a pivot rod pivotally connected to the second rotating member; a pivot rod pivotally connected to the second swinging member; The two pivot rods are pivotally connected, wherein at least one of the pivot rods is provided with a protrusion, and the protrusion limits the two pivot rods to be arranged at an angle when the seat body descends.

7. The lifting chair according to claim 6, characterized in that: A limiting member is provided on the first rotating member and / or the second rotating member, and the limiting member limits the seat body to move in the left-right direction of the mounting base.

8. The lifting chair according to claim 1, characterized in that: The motor is arranged at an end of the mounting base away from the first pivot axis and the second pivot axis.

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