Mechanism for rapidly lifting table and chair

Abstract

The utility model relates to a mechanism for quickly lifting tables and chairs. The mechanism comprises a lifting device, the lifting device comprises a control mechanism and a clamping mechanism, and a pressing rod is arranged between the control mechanism and the clamping mechanism; the upper end of the pressing rod is arranged in the control mechanism, and the lower end of the pressing rod is suspended over the position close to the clamping and fixing mechanism. The mechanism for quickly lifting the table and the chair has the advantages of simple structure, one-key lifting, good stability and wide application range.

Description

Technical Field

[0001] The utility model relates to a mechanism for quickly lifting tables and chairs. Background Art

[0002] Due to different usage environments and users, many tables and chairs can now be adjusted in height, which is also better adapted to different groups of people and makes the product more cost-effective; desks and chairs used in schools need to be able to adjust their height, because the height of children of each age group changes every year, and different children have different heights, and the height requirements of desks and chairs are also different. Therefore, the height of desks and chairs should be conveniently adjusted. Existing desks and chairs can generally be adjusted in angle, especially chairs. Most of them can adjust the angle of the backrest. The most widely used height adjustment is to adjust the height through a cylinder. This kind of cylinder has poor stability because it is easy to be automatically pressed down after the applied gravity is too large, and the cylinder may explode, which poses a safety hazard; for example, common structures such as screws, ratchets or elastic parts are used to adjust the height, such as patents CN218605569, CN203555346, and CN215271274. Utility Model Content

[0003] The utility model mainly solves the technical problems existing in the prior art, thereby providing a mechanism for quickly lifting tables and chairs which has a simple structure, can be lifted and lowered with one key, has good stability and is widely applicable.

[0004] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0005] The utility model discloses a mechanism for quickly lifting tables and chairs, comprising a lifting device; the lifting device comprises a control mechanism and a clamping mechanism, a pressure rod is arranged between the control mechanism and the clamping mechanism; the upper end of the pressure rod is arranged in the control mechanism, and the lower end is suspended just above the clamping mechanism.

[0006] Preferably, the control mechanism comprises a push block and a shift block which can be pressed downward by the push block.

[0007] Preferably, the two surfaces where the push block contacts the shift block are both beveled surfaces, and the two surfaces intersect.

[0008] Preferably, a button is provided at the other end of the push block, and a spring a is provided in the middle of the push block.

[0009] Preferably, the upper end of the pressure rod is connected to the bottom of the moving block, and a spring b is sleeved on the pressure rod near the moving block.

[0010] Preferably, a switch housing is disposed on the outer shell of the control mechanism.

[0011] Preferably, the fastening mechanism comprises a fastening member and a fastening member shell sleeved outside the fastening member.

[0012] Preferably, the card member includes an upper card and a lower card, and a spring c arranged between the upper card and the lower card.

[0013] Preferably, the upper card includes an upper card body and a card platform a which protrudes outward from the middle of the upper card body, and a hole a is provided in the middle of the card platform a; below the card platform a is an inwardly concave semicircular arc platform a; a card edge a extending outward is also provided on one side of the upper card body; and spring holes are symmetrically provided on the upper card body and on both sides of the card platform a.

[0014] Preferably, the lower card includes a lower card body, a card platform b located on one side of the lower card body, and a hook on the card platform b, a card edge b extending outward is provided on the other side of the lower card body, and springs c are provided on both sides of the card platform b; a hole b is provided in the middle of the card platform b, and the card platform b extends outward from the bottom of the lower card body and protrudes into an approximately semicircular structure, and the top of the card platform b is an inwardly concave semicircular arc platform b.

[0015] Preferably, the card shell is composed of two symmetrical shells, a semicircular arc is provided in the middle of the upper and lower sides of the card shell, and long holes are provided near the bottom of the two side surfaces to cooperate with the card edge a and the card edge b.

[0016] Preferably, the lifting device is outer-coated with an upper pipe and a lower pipe.

[0017] Preferably, one end of the upper pipe is sleeved in the lower pipe, and a plurality of grooves are symmetrically provided on both sides of the inner side of the lower pipe.

[0018] Preferably, a cone head with a conical structure is provided at the end of the pressure rod.

[0019] The beneficial effects of the utility model are:

[0020] The control mechanism and the fixing mechanism are connected by a pressure rod, and the overall structure is simple; the upper and lower cards are hooked together, and the upper and lower cards are moved inward by pressing the pressure rod downward to realize the extension and retraction of the card edge, thereby achieving the effect of clamping and disengaging, and can realize one-key fixing and disengagement. Combined with the structure of the push block and the shift block, the upper pipe can be raised and lowered with one button, which is easy to operate, not easy to be damaged as a whole, and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the lifting mechanism in the utility model;

[0023] Figure 2 It is an exploded schematic diagram of the lifting mechanism in the utility model;

[0024] Figure 3-4 It is a partial enlarged structural schematic diagram of the utility model;

[0025] Figure 5 It is an exploded schematic diagram of the lifting mechanism in the utility model;

[0026] Figure 6-9 It is a schematic diagram of a partially enlarged structure in the utility model;

[0027] Fig.10 A schematic diagram of a desk with a lifting mechanism of the utility model installed;

[0028] Fig.11 for Fig.10 sectional view of .

[0029] In the figure: 1-upper pipe, 2-lower pipe, 3-lifting device, 1.1-upper shell, 1.2-switch shell, 2.1-lower shell, 3.1-button, 3.2-push block, 3.3-spring a, 3.4-moving block, 3.5-spring b, 3.6-pressure rod, 3.7-card shell, 3.8-card, 2.11-groove, 3.61-cone head, 3.71-long hole, 3.81-upper card, 3.82-lower card, 3.83-spring C, 3.811-upper card body, 3.812-card edge a, 3.813-hole a, 3.814-spring hole, 3.815-card platform a, 3.816-arc platform a, 3.821-lower card body, 3.822-card platform b, 3.823-hook, 3.824-card edge b, 3.825-arc platform b, 3.826-hole b. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] like Figure 2As shown, a mechanism for quickly lifting tables and chairs is mainly used for various tables that use pipe fittings for height lifting, and can be applied to furniture and school furniture. It includes a lifting device 3; the lifting device 3 includes a control mechanism and a clamping mechanism, and a pressure rod 3.6 is arranged between the control mechanism and the clamping mechanism; the upper end of the pressure rod 3.6 is arranged in the control mechanism, and the lower end is suspended just above the clamping mechanism; specifically, the control mechanism is a switch that controls the clamping mechanism, and the pressure rod 3.6 is pressed down and reset through the control mechanism. When the pressure rod 3.6 is pressed down, it can contact the clamping mechanism, open the clamping mechanism to fix it, and after the pressure rod 3.6 is reset, the clamping mechanism loses the external force of resistance and returns to its original position and is no longer fixed.

[0032] See also Figure 3 As shown, the control mechanism includes a push block 3.2 and a shift block 3.4 which can be pressed down by the push block 3.2.

[0033] The two surfaces of the push block 3.2 in contact with the shift block 3.4 are both beveled surfaces, and the two surfaces intersect; specifically, the push block 3.2 can move inward along the surface of the shift block 3.4, so that the shift block 3.4 will move downward along the bevel when the push block 3.2 moves inward.

[0034] A button 3.1 is provided at the other end of the push block 3.2, and a spring a3.3 is provided in the middle of the push block 3.2; specifically, by applying external force to the button 3.1, pressing it inwards causes the push block 3.2 to move inwards accordingly, and when the button 3.1 is released, the spring a3.3 loses the external force and rebounds, thereby automatically restoring the push block 3.2 to its original position, and at the same time, the outward movement of the push block 3.2 causes the shift block 3.4 to lose its downward pressure, thereby returning the shift block 3.4 to its original position accordingly.

[0035] The upper end of the pressure rod 3.6 is connected to the bottom of the moving block 3.4, and a spring b3.5 is sleeved on the pressure rod 3.6 near the moving block 3.4; specifically, after the moving block 3.4 is pressed down by the push block 3.2, after the downward pressure of the push block 3.2 is lost, the moving block 3.4 can automatically return to its original position due to the action of the spring b3.5.

[0036] The control mechanism is provided with a switch housing 1.2; specifically, the push block 3.2, the shift block 3.4 and the spring b3.5 are all sleeved in the switch housing 1.2, the pressure rod 3.6 passes through the bottom of the switch housing 1.2 and is connected to the bottom of the shift block 3.4, one end of the spring b3.5 abuts against the bottom of the shift block 3.4, and the other end abuts against the inner side of the bottom of the switch housing 1.2; one end of the spring a3.3 abuts against the inner side of the button 3.1, and the other end abuts against the side wall of the switch housing 1.2; one end of the button 3.1 protrudes to the outside of the switch housing 1.2.

[0037] See also Figure 4As shown, the fastening mechanism comprises a fastening member 3.8 and a fastening member shell 3.7 sleeved on the fastening member 3.8.

[0038] See also Figure 5-7 As shown, the card member 3.8 includes an upper card 3.81 and a lower card 3.82, and a spring c3.83 arranged between the upper card 3.81 and the lower card 3.82; specifically, the upper and lower cards cooperate with each other, the lower card 3.82 is located below the upper card 3.81, and one end is sleeved on the upper card 3.81.

[0039] See also Figure 8-9 As shown, the upper card 3.81 includes an upper card body 3.811 and a card platform a3.815 located in the middle of the upper card body 3.811 and protruding outward, wherein a hole a3.813 is provided in the middle of the card platform a3.815; below the card platform a3.815 is an inwardly concave semicircular arc platform a3.816; a card edge a3.812 extending outward is also provided on one side of the upper card body 3.811; spring holes 3.814 are symmetrically provided on the upper card body 3.811 and on both sides of the card platform a3.815; specifically, the card platform a3.815 is an elliptical structure, one end of which protrudes outward from the upper card body 3.811; and the hole a3.813 is an elliptical hole.

[0040] The lower card 3.82 includes a lower card body 3.821, a card platform b3.822 located on one side of the lower card body 3.821, and a hook 3.823 on the card platform b3.822. An outwardly extending card edge b3.824 is provided on the other side of the lower card body 3.821, and springs c3.83 are provided on both sides of the card platform b3.822. A hole b3.826 is provided in the middle of the card platform b3.822. The card platform b3.822 extends outward from the bottom of the lower card body 3.821 and protrudes into a nearly semicircular structure. The thickness of the card platform b3.822 accounts for half of the total thickness of the lower card body 3.821. The top of the card platform b3.822 is an inwardly concave semicircular arc platform b 3.825; specifically, the extended part of the card platform a3.815 can be inserted into the arc platform b3.825, the protruding part of the card platform b3.822 can be inserted into the arc platform a3.816, and the hook 3.823 is inserted into the hole a3.813. After the hook 3.823 is inserted into the hole a3.813, the hook 3.823 and the outer edge of the card platform a3.815 form a through hole, and the end of the pressure rod 3.6 is just suspended above the through hole. When the pressure rod 3.6 is pressed down, the end of the pressure rod 3.6 can be inserted into the through hole, so that the upper card 3.81 and the lower card 3.82 can move inwards to each other, so that the card edge a3.812 and the card edge b3.824 can also move inwards at the same time.

[0041] The card shell 3.7 is composed of two symmetrical shells, and a semicircular arc (not marked) is arranged in the middle position of the upper and lower sides of the card shell 3.7, and long holes 3.71 are arranged near the bottom of its two side surfaces to cooperate with the card edge a3.812 and the card edge b3.824. Furthermore, one end of the card edge a and the card edge b passes through the long hole 3.71 and extends to the outside of the card shell 3.7.

[0042] See also Figure 1-2 As shown, the lifting device is outerly provided with an upper pipe 1 and a lower pipe 2.

[0043] See also Figure 4 As shown, one end of the upper pipe 1 is sleeved in the lower pipe 2, and a plurality of grooves 2.11 are symmetrically provided on both sides of the inner side of the lower pipe 2. Specifically, the groove 2.11 corresponds to the card edge a3.812 and the card edge b3.824. When the pressure rod 3.6 is not working downward, the card edge a3.812 and the card edge b3.824 are respectively stuck in the groove 2.11, so that a fixation is formed, so that the upper pipe fitting 1 forms a height. When the pressure rod 3.6 is pressed downward, the upper card 3.81 and the lower card 3.82 move inwardly relative to each other (for specific ways to form the inward movement, please refer to the explanation in the description of the specific structure of the upper and lower cards above), the card edge a and the card edge b are separated from the groove 2.11. At this time, the upper pipe fitting 1 can be freely adjusted up and down in height. When it is adjusted to a suitable height, it is only necessary to release the button 3.1 to let the pressure rod 3.6 lose the downward pressure and return to its original position. The card edge a and the card edge b can automatically be stuck in the groove 2.11 to complete the fixing, so that the upper pipe fitting 1 is stabilized.

[0044] The end of the pressure rod 3.6 is provided with a cone head 3.61 of a cone structure.

[0045] It should be noted that the upper tube 1 can be provided with a desk board or a seat board of a chair, so the lifting structure of the present application is suitable for a variety of products supported by the same type of tubes. In addition, the upper card and the lower card can be connected to each other in a variety of ways, such as providing a guide groove at the bottom of the upper card and providing a guide rod on the front of the lower card that is inserted into the guide groove, so that the upper and lower cards can also move relative to each other along the guide groove to complete the extension and clamping of the card edge a and the card edge b.

[0046] The beneficial effects of the utility model are:

[0047] The control mechanism and the fixing mechanism are connected by a pressure rod, and the overall structure is simple; the upper and lower cards are hooked together, and the upper and lower cards are moved inward by pressing the pressure rod downward to realize the extension and retraction of the card edge, thereby achieving the effect of clamping and disengaging, and can realize one-key fixing and disengagement. Combined with the structure of the push block and the shift block, the upper pipe can be raised and lowered with one button, which is easy to operate, not easy to be damaged as a whole, and has a wide range of applicability.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A mechanism for quickly raising and lowering tables and chairs, characterized in that: The lifting device (3) comprises a control mechanism and a fixing mechanism, and a pressure rod (3.6) is arranged between the control mechanism and the fixing mechanism; the upper end of the pressure rod (3.6) is arranged in the control mechanism, and the lower end of the pressure rod (3.6) is suspended just above the fixing mechanism when not pressed down.

2. The mechanism for quickly lifting tables and chairs according to claim 1, characterized in that: The control mechanism comprises a push block (3.2) and a shift block (3.4) which can be pressed down by the push block (3.2).

3. The mechanism for quickly lifting tables and chairs according to claim 2, characterized in that: The two surfaces of the push block (3.2) and the shift block (3.4) that are in contact are both beveled surfaces, and the two surfaces intersect.

4. The mechanism for quickly lifting tables and chairs according to claim 2, characterized in that: A button (3.1) is arranged at the other end of the push block (3.2), and a spring a (3.3) is arranged in the middle of the push block (3.2).

5. The mechanism for quickly raising and lowering tables and chairs according to claim 3, characterized in that: The upper end of the pressure rod (3.6) is connected to the bottom of the moving block (3.4), and a spring b (3.5) is sleeved on the pressure rod (3.6) near the moving block (3.4).

6. The mechanism for quickly lifting tables and chairs according to claim 1, characterized in that: The clamping mechanism comprises a clamping piece (3.8) and a clamping piece shell (3.7) sleeved outside the clamping piece (3.8).

7. The mechanism for quickly raising and lowering tables and chairs according to claim 6, characterized in that: The card member (3.8) comprises an upper card (3.81) and a lower card (3.82), and a spring c (3.83) arranged between the upper card (3.81) and the lower card (3.82).

8. The mechanism for quickly raising and lowering tables and chairs according to claim 7, characterized in that: The upper card (3.81) comprises an upper card body (3.811) and a card platform a (3.815) located in the middle of the upper card body (3.811) and protruding outwards; a hole a (3.813) is provided in the middle of the card platform a (3.815); a semicircular arc platform a (3.816) concave inwards is provided below the card platform a (3.815); a card edge a (3.812) extending outwards is also provided on one side of the upper card body (3.811); and spring holes (3.814) are symmetrically provided on the upper card body (3.811) and on both sides of the card platform a (3.815).

9. The mechanism for quickly raising and lowering tables and chairs according to claim 7, characterized in that: The lower card (3.82) comprises a lower card body (3.821), a card platform b (3.822) located on one side of the lower card body (3.821), and a hook (3.823) on the card platform b (3.822); a card edge b (3.824) extending outward is arranged on the other side of the lower card body (3.821); and springs c (3.83) are arranged on both sides of the card platform b (3.822); a hole b (3.826) is opened in the middle of the card platform b (3.822); the card platform b (3.822) extends outward from the bottom of the lower card body (3.821) and protrudes into a nearly semicircular structure; the upper part of the card platform b (3.822) is an inwardly concave semicircular arc platform b (3.825); and the hook (3.823) can be inserted into the card platform a (3.815).

10. The mechanism for quickly raising and lowering tables and chairs according to claim 6, characterized in that: The card housing (3.7) is composed of two symmetrical shells, a semicircular arc is arranged in the middle of the upper and lower sides of the card housing (3.7), and long holes (3.71) are arranged near the bottom of the two side surfaces thereof to match the card edge a (3.812) and the card edge b (3.824).

11. The mechanism for quickly raising and lowering tables and chairs according to claim 2, characterized in that: The lifting device is outerly provided with an upper pipe member (1) and a lower pipe member (2).

12. The mechanism for quickly raising and lowering tables and chairs according to claim 11, characterized in that: One end of the upper pipe (1) is sleeved in the lower pipe (2), and two or more grooves (2.11) are symmetrically provided on both sides of the inner side of the lower pipe (2).

13. The mechanism for quickly raising and lowering tables and chairs according to claim 1, characterized in that: The end of the pressure rod (3.6) is provided with a cone head (3.61) with a cone structure.

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