Lifting supporting mechanism and lifting chair using same

Abstract

The utility model discloses a lifting support mechanism and a lifting chair using the same, and the lifting support mechanism comprises a lower support pipe which comprises a lower pipe body with a hollow inner cavity and an opening which is arranged at one side end of the lower pipe body and is communicated with the hollow inner cavity; the upper supporting pipe comprises an upper pipe body provided with a hollow inner cavity and a pair of open holes which are formed in the pair of side ends of the upper pipe body respectively and are communicated with the hollow inner cavity; the upper pipe body partially sleeves the outer side of the lower pipe body, and the upper pipe body is suitable for ascending and descending along the lower pipe body; the lead screw assembly comprises a nut fixedly connected with the hollow inner cavity of the lower pipe body and a lead screw connected with the nut in a matched mode. A connecting part connected with a nut is arranged in the hollow inner cavity of the lower pipe body; the supporting plate is arranged at the end, away from the lower pipe body, of the upper pipe body, and one end of the lead screw penetrates through the supporting plate and then extends into the hollow inner cavity of the upper pipe body; the elastic piece is arranged on the outer layer of the lead screw in a sleeving mode and clamped between the connecting part and the supporting plate in the axial direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technology field especially, it relates to a kind of lifting support mechanism and the lifting chair using it. BACKGROUND

[0002] Lifting chair is widely used in office, household or car, and its lifting function is mainly realized by lifting support mechanism which can drive the chair body to make lifting movement.For lifting support mechanism, it can be driven by pneumatic or electric mode.

[0003] For this, for example, the announcement No.CN218960355U discloses a kind of seat electric lifting system, it includes chair foot, outer connecting sleeve, inner connecting sleeve, screw nut, screw rod, motor and seat installation device;Chair foot is provided with first through-hole, outer connecting sleeve is vertically fixed on chair foot, and second through-hole is provided in outer connecting sleeve;The lower end of inner connecting sleeve is connected with screw nut, and inner connecting sleeve and screw nut are installed in the second through-hole of outer connecting sleeve in a lifting manner, and the upper end of inner connecting sleeve is connected with the seat installation device;Third through-hole is provided in inner connecting sleeve, screw rod is vertically passed through screw nut and is transmission matched with screw nut, and the lower end of screw rod is downwardly movable and passes through first through-hole, and the upper end of screw rod is upwardly movable and extends into the third through-hole of inner connecting sleeve;Motor is installed on the lower side of chair foot, and the power output end of motor is connected with the lower end of screw rod to drive screw rod to rotate.

[0004] Compared with pneumatic mode, electric structure is more stable in use and higher in safety.For the lifting support mechanism realized by electric mode, for example, but not limited to the above-mentioned disclosed technology, it is found by actual research and use that electric mode has the following problems: on the one hand, the lifting process is too fast, resulting in poor experience, on the other hand, when the seat is adjusted upward under load, the load pressure is higher for the motor used, and the energy consumption is also more.

[0005] Therefore, for the lifting support mechanism of electric mode, its structure needs to be further improved from the perspective of optimizing its use process. UTILITY MODEL CONTENTS

[0006] The first object of the utility model is to provide a kind of lifting support mechanism, to solve the technical problem of optimizing its use process.

[0007] The second object of the utility model is to provide a kind of lifting chair, to solve the technical problem of optimizing the lifting adjustment process of lifting chair.

[0008] The lifting support mechanism of the utility model is realized as follows:

[0009] A kind of lifting support mechanism, comprising:

[0010] a lower support pipe comprising a lower pipe body formed with a hollow inner cavity and an opening provided at one side end of the lower pipe body and penetrating the hollow inner cavity;

[0011] an upper support pipe comprising an upper pipe body formed with a hollow inner cavity and a pair of openings provided at a pair of side ends of the upper pipe body and penetrating the hollow inner cavity; the upper pipe body is partially sleeved outside the lower pipe body, and the upper pipe body is adapted to make lifting motion along the lower pipe body;

[0012] a screw rod assembly comprising a nut fixedly connected with the hollow inner cavity of the lower pipe body and a screw rod matched with the nut; wherein the hollow inner cavity of the lower pipe body is provided with a connecting portion connected with the nut;

[0013] a support plate provided at one end of the upper pipe body away from the lower pipe body, and one end of the screw rod penetrates the support plate and extends into the hollow inner cavity of the upper pipe body; and

[0014] a resilient member sleeved outside the screw rod and axially clamped between the connecting portion and the support plate.

[0015] In the optional implementation of the utility model, the resilient member is a tower-shaped spring.

[0016] In the optional implementation of the utility model, the large-diameter shaft side end of the tower-shaped spring abuts against the support plate; and

[0017] The small-diameter shaft side end of the tower-shaped spring abuts against the connecting portion.

[0018] In the optional implementation of the utility model, a guide sleeve is further provided between the inner wall of the upper pipe body and the outer wall of the lower pipe body;

[0019] The guide sleeve is fixed on the inner wall of the upper pipe body.

[0020] In the optional implementation of the utility model, the guide sleeve is made of plastic material; and

[0021] The upper pipe body is made of metal material, and the guide sleeve is adapted to be in interference fit with the hollow inner cavity of the upper pipe body.

[0022] In the optional implementation of the utility model, the side end of the lower pipe body away from the upper pipe body is further provided with a support base plate.

[0023] In the optional implementation of the utility model, an assembly hole for matching the nut is formed on the connecting portion; and

[0024] The nut comprises a columnar body adapted to penetrate the assembly hole and formed with an inner threaded hole for matching the screw rod, and an annular connecting piece integrally formed on the outer sidewall of the columnar body; wherein

[0025] The annular connecting piece is adapted to be lapped on the side end face of the connecting portion towards the upper pipe body.

[0026] In the optional implementation of the utility model, the outer diameter of the connecting portion is larger than the outer diameter of the annular connecting piece; and the inner diameter of the shaft side end of the elastic member abutting against the connecting portion is larger than the outer diameter of the annular connecting piece.

[0027] In the optional implementation of the utility model, the support plate is further provided with a power structure for driving the rotation of the lead screw.

[0028] The lifting chair of the utility model is realized as follows:

[0029] A lifting chair at least comprises the lifting support mechanism.

[0030] By adopting the above technical scheme, the utility model has the following beneficial effects: the lifting support mechanism and the lifting chair using the same, when the upper support pipe makes descending motion relative to the lower support pipe in the process of operation of the lead screw assembly, on the one hand, the descending motion speed of the upper support pipe relative to the lower support pipe can be avoided to be too fast, and the comfort degree of the descending process of the lifting chair is improved; on the other hand, the elastic member can be compressed and deformed with the descending motion of the lower support pipe to play the role of energy storage, so that when the upper support pipe needs to make ascending motion relative to the lower support pipe, not only the motion of the lead screw can drive the motion of the upper support pipe, but also the restoring action of the elastic member can assist the ascending motion of the upper support pipe, thereby the pressure generated by the load of the upper support pipe on the motion of the lead screw assembly is reduced. Therefore, the setting of the elastic member can optimize the lifting and adjusting process of the lifting chair. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a whole structure schematic view of the lifting support mechanism of the utility model;

[0032] Figure 2 It is an internal section structure schematic view of the lifting support mechanism of the utility model;

[0033] Figure 3 It is a local structure schematic view of the lifting support mechanism of the utility model Figure 1 .

[0034] Figure 4 It is a local structure schematic view of the lifting support mechanism of the utility model Figure 2 .

[0035] In the figure: lower pipe body 1, hollow inner cavity 11, connecting portion 12, support base 2, upper pipe body 3, hollow inner cavity 31, guide sleeve 4, screw rod 5, screw 51, support plate 61, support seat 62, connecting plate 63, worm wheel 71, worm 72, motor 73, tower-shaped spring 8, columnar body 91, annular connecting piece 92. DETAILED DESCRIPTION

[0036] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining the drawings, the utility model is further detailed.

[0037] Example 1:

[0038] Please refer to Figures 1 to 4 The embodiment provides a lifting support mechanism, which comprises a lower support pipe, an upper support pipe partially sleeved on the outer layer of the lower support pipe and a screw rod assembly for driving the upper support pipe to move up and down relative to the lower support pipe.

[0039] The lower support pipe is located below the upper support pipe. As for the general shape of the lower support pipe and the upper support pipe, both can be cylindrical pipe bodies or vertical columns with rectangular cross sections, and the embodiment does not make absolute limitation to the specific shape, and the cylindrical pipe body is taken as an example for description in the embodiment in combination with the drawings. As for the material, in order to ensure that the upper support pipe and the lower support pipe can have strong support strength, the upper support pipe and the lower support pipe are both made of metal material.

[0040] Specifically, the lower support pipe comprises a lower pipe body 1 formed with a hollow inner cavity 11 and an opening provided at one side end of the lower pipe body 1 and penetrating through the hollow inner cavity 11; and a support base 2 is further provided at the side end of the lower pipe body 1 away from the upper pipe body 3, and the support base 2 can be directly supported on the ground to play a supporting role at the bottom.

[0041] The upper support pipe comprises an upper pipe body 3 formed with a hollow inner cavity 31 and a pair of openings provided at a pair of side ends of the upper pipe body 3 and penetrating through the hollow inner cavity 31; and the upper pipe body 3 is partially sleeved on the outside of the lower pipe body 1, and the upper pipe body 3 is adapted to move up and down along the lower pipe body 1.

[0042] On the basis of the above structure, based on the condition that the upper support pipe and the lower support pipe are both made of metal material, in order to reduce the friction of the upper support pipe relative to the lower support pipe during the lifting movement, the inner wall of the upper pipe body 3 and the outer wall of the lower pipe body 1 are also provided with a guide sleeve 4. Specifically, the guide sleeve 4 is fixed on the inner wall of the upper pipe body 3, and in this case, the guide sleeve 4 is made of plastic material; and the guide sleeve 4 is adapted to be interference fit with the hollow inner cavity 31 of the upper pipe body 3. In this structure, when the upper pipe body 3 moves up and down relative to the lower pipe body 1, the plastic guide sleeve 4 directly rubs against the outer wall of the lower pipe body 1.

[0043] Next, it is explained that the cooperation mode between the lead screw assembly and the upper support pipe and the lower support pipe:

[0044] The lead screw assembly includes a nut fixedly connected with the hollow inner cavity 11 of the lower pipe body 1 and a lead screw 5 matched with the nut; wherein the hollow inner cavity 11 of the lower pipe body 1 is provided with a connecting portion 12 connected with the nut. And the end of the upper pipe body 3 away from the lower pipe body 1 is provided with a support plate 61, and one end of the lead screw 5 penetrates through the support plate 61 and extends into the hollow inner cavity 31 of the upper pipe body 3; the support plate 61 is also provided with a power structure for driving the lead screw 5 to rotate.

[0045] The specific structure of the power structure is not absolutely limited in this embodiment, as long as it can drive the lead screw 5 to rotate, which meets the use requirement of this embodiment. Here, combined with the drawings, an example is given, the power structure includes a worm gear 71 provided on the end of the lead screw 5 extending on the side of the support plate 61 away from the upper support pipe, a worm 72 engaged with the worm gear 71, and a motor 73 for driving the worm 72 to operate. In addition, it should be noted that the motor 73 can be directly fixed on the support plate 61, and the side end of the support plate 61 away from the upper support pipe is fixed with a support seat 62 for rotating cooperation with the lead screw 5. The support seat 62 can be directly or indirectly fixed on the support plate 61 through the adapter plate 63. The lead screw 5 can be matched with the support seat 62 through the bearing, and the support plate 61 is provided with a through hole adapted for the lead screw 5 to penetrate.

[0046] Regarding the cooperation between the screw rod 5 and the lower supporting tube: the connecting part 12 is provided with an assembly hole for matching the nut; and the nut comprises a columnar body 91 adapted to penetrate the assembly hole and formed with an inner threaded hole for matching the screw rod 5, and a ring-shaped connecting piece 92 integrally formed on the outer side wall of the columnar body 91; wherein the ring-shaped connecting piece 92 is adapted to be lapped on the side end face of the connecting part 12 towards the upper tube body 3, thereby playing a fixing role for the nut through the connecting part 12, and when the screw rod 5 rotates, the nut is fixed, and then the screw rod 5 supporting plate 61 and the upper supporting tube body move together. Under this structure, in order to avoid the problem of unexpected disengagement between the screw rod 5 and the nut, a screw 51 is matched at the end of the screw rod 5 penetrating the inner threaded hole of the nut and away from the supporting base 62, and the outer diameter of the head end of the screw 51 is greater than the inner diameter of the inner threaded hole.

[0047] Next, it is to be explained that the embodiment is also provided with an elastic member, which is sleeved on the outer layer of the screw rod 5 and axially clamped between the connecting part 12 and the supporting plate 61, that is, for the two axial side ends of the elastic member, one axial side end is in abutment with the supporting plate 61, and the other axial side end is in abutment with the connecting part 12, so that in order to make the connecting part 12 better realize the supporting role for one axial side end of the elastic member, the outer diameter of the connecting part 12 is greater than the outer diameter of the ring-shaped connecting piece 92, and the inner diameter of the axial side end of the elastic member in abutment with the connecting part 12 is greater than the outer diameter of the ring-shaped connecting piece 92. Under such a structure, the connecting part 12 can simultaneously meet the cooperation requirements of the nut and the elastic member.

[0048] On the basis of the above, it needs to be explained that theoretically, the elastic member here can be realized by a columnar spring, but considering the purpose of prolonging the service life of the elastic member for a long time, the elastic member in the embodiment adopts a tower spring 8. The large-diameter axial side end of the tower spring 8 is in abutment with the supporting plate 61, and the small-diameter axial side end of the tower spring 8 is in abutment with the connecting part 12. The outer diameter of the large-diameter axial side end is greater than the outer diameter of the small-diameter axial side end.

[0049] In summary, for the lifting supporting mechanism of the embodiment, when the upper supporting tube moves downward relative to the lower supporting tube during the operation of the screw rod assembly, due to the role of the elastic member, on the one hand, it can avoid the downward movement speed of the upper supporting tube relative to the lower supporting tube being too fast, thereby improving the comfort of the lifting chair during the downward movement; on the other hand, the elastic member can be compressed and deformed with the downward movement of the lower supporting tube to play a role in energy storage, so that when the upper supporting tube needs to move upward relative to the lower supporting tube, not only the movement of the screw rod 5 can drive the movement of the upper supporting tube, but also the elastic member can assist the upward movement of the upper supporting tube through the restoring action, thereby reducing the pressure on the screw rod assembly caused by the load on the upper supporting tube. Therefore, through the setting of the elastic member, the lifting chair can be optimized during the lifting and adjusting process.

[0050] Embodiment 2:

[0051] On the basis of the lifting support mechanism of embodiment 1, the embodiment provides a lifting chair, at least comprising: the lifting support mechanism of embodiment 1, on the basis of the structure, the chair body of the lifting chair is connected with the support plate 61 of the lifting support mechanism, thereby driving the chair body to lift through the lifting movement of the upper support pipe connected with the support plate 61 relative to the lower support pipe.

[0052] The above specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above is only a specific embodiment of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0053] In the description of the utility model, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model.

[0054] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0055] In the description of the utility model, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the utility model product when it is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model. The device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0056] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0057] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A lifting support mechanism, characterized by, The application relates to a lifting support mechanism, comprising: a lower support pipe comprising a lower pipe body with a hollow inner cavity and an opening on one side end of the lower pipe body and penetrating the hollow inner cavity; an upper support pipe comprising an upper pipe body with a hollow inner cavity and a pair of openings on a pair of side ends of the upper pipe body and penetrating the hollow inner cavity; the upper pipe body is partially sleeved on the outside of the lower pipe body, and the upper pipe body is adapted to make lifting motion along the lower pipe body; a screw rod assembly comprising a nut fixed to the hollow inner cavity of the lower pipe body and a screw rod matched with the nut; wherein a connecting part connected with the nut is arranged in the hollow inner cavity of the lower pipe body; a support plate arranged on one end of the upper pipe body away from the lower pipe body, and one end of the screw rod penetrates the support plate and extends into the hollow inner cavity of the upper pipe body; and a resilient member sleeved on the outer layer of the screw rod and axially clamped between the connecting part and the support plate.

2. The lifting support mechanism of claim 1, wherein, The resilient member is a tower spring.

3. The lifting support mechanism of claim 2, wherein, The large-diameter shaft side end of the tower spring abuts against the support plate; and The small-diameter shaft side end of the tower spring abuts against the connecting part.

4. The lifting support mechanism according to any one of claims 1 to 3, characterized in that A guide sleeve is further arranged between the inner wall of the upper pipe body and the outer wall of the lower pipe body; The guide sleeve is fixed on the inner wall of the upper pipe body.

5. The lifting support mechanism of claim 4, wherein, The guide sleeve is made of plastic material; and The upper pipe body is made of metal material, and the guide sleeve is adapted to be in interference fit with the hollow inner cavity of the upper pipe body.

6. The lifting support mechanism of claim 1, wherein, The side end of the lower pipe body away from the upper pipe body is further provided with a support base plate.

7. The lifting support mechanism of claim 1, wherein, An assembly hole for matching the nut is arranged on the connecting part; and The nut comprises a columnar body adapted to penetrate the assembly hole and formed with an inner threaded hole for matching the screw rod, and an annular connecting piece integrally formed on the outer side wall of the columnar body; The annular connecting piece is adapted to be lapped on the side end surface of the connecting part towards the upper pipe body. The outer diameter of the connecting part is larger than the outer diameter of the annular connecting piece; and the inner diameter of the shaft side end of the resilient member adapted to abut against the connecting part is larger than the outer diameter of the annular connecting piece.

8. The lifting support mechanism of claim 7, wherein, The support plate is further provided with a power structure for driving the screw rod to rotate.

9. The lifting support mechanism of claim 1, wherein, At least comprising:

10. A lifting chair, characterized in that The lifting support mechanism according to any one of claims 1-9. ​

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