Movable supporting leg

By designing a combination of retractable bull eye rollers and compression springs on the table and chairs, the problem of heavy movement and easy traces when moving is solved, the table and chairs are easily left when fixed, and the effect of stable support and convenient movement is achieved, ensuring the safety of table and chairs and convenience.

CN222323154UActive Publication Date: 2025-01-10ZHEJIANG WEITAI DECORATION FURNITURE CO LTD
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Patent Information

Application Number
CN202420650562.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-01
Publication Date
2025-01-10
Estimated Expiration
2034-04-01

AI Technical Summary

Technical Problem

Existing tables and chairs are bulky and difficult to push when moving, especially for children, and are prone to leaving traces when fixed to the ground; while tables and chairs with wheels are likely to cause chair movement when used, which may lead to falls.

Method used

A movable support leg is designed, using a combination of retractable bull eye roller and compression spring. By fixing it to the ground when the table and chair is weighted, the bull eye roller is popped out when gently pushing or pulling, making it easier to move.

Benefits of technology

It realizes that tables and chairs can be easily moved while supporting them stably, avoiding the risk of ground marks and fall injuries, and the structure is simple and easy to install.

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Abstract

The utility model relates to the technical field of furniture, in particular to a movable supporting leg which comprises a supporting section and a supporting foot section, the interior of the supporting foot section is hollow and provided with an installation cavity, and the interior of the supporting section is provided with a guide cavity communicated with the installation cavity. A mounting seat is in sliding friction connection in the mounting cavity, and an annular groove is formed in the peripheral wall of the top of the mounting seat; a compression spring is mounted in the annular groove; a guide column extending into the guide cavity is arranged at the top of the mounting seat; universal balls are mounted in hemispherical grooves formed by inward sinking of the lower surfaces of the mounting seats, a plurality of small rollers are further mounted in gaps between the inner walls of the hemispherical grooves and the universal balls, and annular end covers are further mounted at the bottoms of the mounting seats; the support leg sections are sleeved with the leg sleeves in a close fit mode, and through holes allowing the universal balls to penetrate out are formed in the bottoms of the leg sleeves; the movable supporting leg provided by the utility model can stably support a table and a chair, can move at will, and is simple in structure and convenient to install.
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Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a movable supporting leg. Background Art

[0002] At present, most of the tables and chairs on the market are either completely fixed on the ground or have wheels installed under the legs of the tables and chairs for movement. For tables fixed on the ground, when they need to be moved for various reasons, the tables are relatively bulky. Although they can be moved, it requires a lot of strength. It is difficult for children to move them, and the legs of the tables and chairs will leave marks on the ground, which are difficult to remove. For tables and chairs with wheels, it is convenient to move, but they cannot be completely fixed. Children sitting on them may cause the chairs to move and fall.

[0003] Therefore, in view of the above problems, the utility model is in urgent need of providing a movable supporting leg. Utility Model Content

[0004] The utility model aims to provide a movable support leg, which solves the problems of the table being difficult to move or easy to fall in the prior art through the design of a retractable bull's eye wheel.

[0005] A movable support leg comprises a support section and a foot section from top to bottom, the foot section is hollow inside and has a mounting cavity, the support section is inside and has a guide cavity connected to the mounting cavity, the inner diameter of the guide cavity is smaller than the inner diameter of the mounting cavity;

[0006] A mounting seat is frictionally connected in a sliding manner up and down in the mounting cavity, and an annular groove is provided on the outer peripheral wall of the top of the mounting seat, and the annular groove is connected with the outer wall of the mounting seat; a compression spring is installed in the annular groove, and the top of the compression spring is in contact with the bottom of the guide cavity; a guide column extending into the guide cavity is provided on the top of the mounting seat, and the outer wall of the guide column is frictionally connected with the inner wall of the guide cavity; the lower surface of the mounting seat is recessed inward to form a hemispherical groove, and a universal ball is installed in the hemispherical groove, and a plurality of small rollers are also installed in the gap between the inner wall of the hemispherical groove and the universal ball, and an annular end cover is also installed at the bottom of the mounting seat;

[0007] It also includes a foot sleeve tightly fitted on the supporting foot section, and a through hole connected to the installation cavity is provided at the bottom of the foot sleeve for the universal ball to pass through, and the inner diameter of the through hole is smaller than the inner diameter of the installation cavity.

[0008] Furthermore, the inner diameter of the annular end cover is smaller than the diameter of the universal ball.

[0009] Furthermore, the inner diameter of the annular groove is larger than the inner diameter of the guide cavity.

[0010] Furthermore, an annular flange is extended downwardly from the bottom of the foot sleeve, and the inner diameter of the annular flange is equal to the inner diameter of the through hole at the bottom of the foot sleeve.

[0011] Furthermore, the length of the mounting cavity is greater than the length of the mounting seat.

[0012] Furthermore, the cross-sections of the support section and the leg section are square or circular.

[0013] Furthermore, a plurality of clamping protrusions are arranged at intervals on the outer surface of the supporting leg section, and a plurality of clamping grooves corresponding to and matching the clamping protrusions are arranged at intervals on the inner surface of the leg sleeve.

[0014] Furthermore, an anti-wear layer having the same inner diameter and outer diameter as the annular flange is installed at the bottom of the annular flange, and the material of the anti-wear layer is rubber.

[0015] Furthermore, the guide column, the mounting seat, the small rollers, the universal ball and the annular end cover are made of carbon steel.

[0016] Furthermore, the compression spring is made of carbon steel.

[0017] Compared with the prior art, the movable support leg provided by the utility model has the following improvements:

[0018] The movable supporting legs provided by the utility model can press the bull's eye wheels into the installation cavity when there is weight on the tables and chairs, and the foot covers are in contact with the ground, thereby fixing the tables and chairs on the ground, thereby increasing the stability of the tables and chairs. When the tables and chairs need to be moved, the heavy objects or people on the tables and chairs are removed, and the bull's eye wheels are ejected by the adjusting springs, making it convenient for users to push or pull the tables and chairs. The movable supporting legs provided by the utility model can be moved at will while stably supporting the tables and chairs, and have a simple structure and are easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram (stereoscopic diagram) of the compression spring of the movable supporting leg in the utility model in a compressed state;

[0021] Figure 2 It is a structural schematic diagram (cross-sectional view) of the movable supporting leg described in the utility model;

[0022] Figure 3It is a structural schematic diagram (cross-sectional view) of the mounting seat described in the utility model;

[0023] Figure 4 It is a structural schematic diagram (cross-sectional view) of the support section and the support leg section described in the utility model;

[0024] Figure 5 It is a structural schematic diagram (cross-sectional view) of the foot sleeve described in the utility model;

[0025] Figure 6 It is a structural schematic diagram (cross-sectional view) of the compression spring of the movable supporting leg described in the utility model in a stretched state.

[0026] Description of reference numerals:

[0027] 101. Support section; 1011. Guide cavity; 102. Support foot section; 1021. Mounting cavity; 1022. Snap-fit ​​protrusion; 2. Compression spring; 301. Guide column; 302. Annular groove; 303. Mounting seat; 304. Small roller; 305. Universal ball; 306. Annular end cover; 4. Foot sleeve; 401. Annular flange; 402. Snap-fit ​​groove; 403. Anti-wear layer. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 indirectly connected 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.

[0031] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, the utility model provides a movable support leg, including a support section 101 and a foot section 102 from top to bottom, the foot section 102 is hollow inside and has a mounting cavity 1021, the support section 101 is inside and has a guide cavity 1011 connected to the mounting cavity 1021, and the inner diameter of the guide cavity 1011 is smaller than the inner diameter of the mounting cavity 1021;

[0032] A mounting seat 303 is frictionally connected in the mounting cavity 1021 so as to slide up and down. An annular groove 302 is provided on the top peripheral wall of the mounting seat 303, and the annular groove 302 is connected with the outer wall of the mounting seat 303; a compression spring 2 is installed in the annular groove 302, and the top of the compression spring 2 is in contact with the bottom of the guide cavity 1011; a guide column 301 extending into the guide cavity 1011 is provided on the top of the mounting seat 303, and the outer wall of the guide column 301 is frictionally connected with the inner wall of the guide cavity 1011; the lower surface of the mounting seat 303 is recessed inward to form a hemispherical groove, and a universal ball 305 is installed in the hemispherical groove. A plurality of small rollers 304 are also installed in the gap between the inner wall of the hemispherical groove and the universal ball 305, and an annular end cover 306 is also installed at the bottom of the mounting seat 303;

[0033] It also includes a foot sleeve 4 that is tightly fitted onto the support foot section 102 . A through hole communicating with the installation cavity 1021 for the universal ball 305 to pass through is provided at the bottom of the foot sleeve 4 . The inner diameter of the through hole is smaller than the inner diameter of the installation cavity 1021 .

[0034] The movable supporting legs provided by the utility model, when there is weight on the table and chair, the mounting seat 303 is pressed into the mounting cavity 1021, and the foot sleeve 4 contacts the ground, fixing the table and chair on the ground, which can increase the stability of the table and chair; when the table and chair need to be moved, the heavy objects or people on the table and chair are removed, and the mounting seat 303 is ejected by the compression spring 2, which is convenient for users to push or pull the table and chair; the movable supporting legs provided by the utility model can be moved at will while stably supporting the table and chair, and the structure is simple and easy to install.

[0035] In the present invention, the guide cavity 1011 provides a guide for the guide column 301, and the installation cavity 1021 provides a guide for the installation seat 303, thereby preventing the compression spring 2 from deforming during the movement of the installation seat 303 and affecting the service life of the support leg.

[0036] like Figure 2 , Figure 3 , Figure 6 As shown, the inner diameter of the annular end cover 306 is smaller than the diameter of the universal ball 305 .

[0037] In the utility model, the annular end cover 306 fixes the plurality of small rollers 304 and the universal ball 305 in the inner wall of the hemispherical groove, ensuring that the universal ball 305 can roll in multiple directions while preventing the plurality of small rollers 304 and the universal ball 305 from falling off from the mounting seat 303.

[0038] like Figure 2 , Figure 6 As shown, the inner diameter of the annular groove 302 is larger than the inner diameter of the guide cavity 1011 .

[0039] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, an annular flange 401 is extended downwardly from the bottom of the foot sleeve 4 , and the inner diameter of the annular flange 401 is equal to the inner diameter of the through hole at the bottom of the foot sleeve 4 .

[0040] like Figure 2 , Figure 6 As shown, the length of the mounting cavity 1021 is greater than the length of the mounting seat 303 .

[0041] In this embodiment, the cross-sections of the support section 101 and the leg section 102 are square or circular.

[0042] like Figure 4 , Figure 5 As shown, a plurality of snap-fit ​​protrusions 1022 are provided at intervals on the outer surface of the support leg section 102 , and a plurality of snap-fit ​​grooves 402 corresponding to and matching the snap-fit ​​protrusions 1022 are provided at intervals on the inner surface of the leg sleeve 4 .

[0043] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, an anti-wear layer 403 having the same inner diameter and outer diameter as the annular flange 401 is installed at the bottom of the annular flange 401 , and the anti-wear layer 403 is made of rubber.

[0044] In the present invention, the anti-wear layer 403 is used to provide friction between the supporting legs and the ground, so as to prevent the table and chair from shifting from the ground during normal use, thereby preventing injuries to users, and ensuring the stability of the table and chair.

[0045] In this embodiment, the guide column 301 , the mounting seat 303 , the small rollers 304 , the universal ball 305 and the annular end cover 306 are made of carbon steel.

[0046] In this embodiment, the compression spring 2 is made of carbon steel.

[0047] In this embodiment,

[0048] The implementation method of the utility model comprises the following steps:

[0049] 1) In normal use, there is weight on the table and chair, the compression spring 2 is compressed, the mounting seat 303 is retracted into the mounting cavity 1021, and the anti-wear layer 403 contacts the ground, providing support for the table and chair, so that the table and chair are stably fixed on the ground;

[0050] 2) When the table and chair need to be moved, remove the weight (heavy objects or people) on the table and chair, compress the spring 2 to push the mounting seat 303 out of the mounting cavity 1021, so that the universal ball 305 contacts the ground. At this time, gently push the table and chair, and the table and chair can be pushed very flexibly, making it convenient for users to move the table and chair.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A movable support leg, characterized in that: The invention comprises a support section (101) and a support foot section (102) from top to bottom, wherein the support foot section (102) is hollow inside and provided with a mounting cavity (1021), and the support section (101) is provided inside with a guide cavity (1011) which is in communication with the mounting cavity (1021), and the inner diameter of the guide cavity (1011) is smaller than the inner diameter of the mounting cavity (1021); A mounting seat (303) is frictionally connected in the mounting cavity (1021) so as to slide up and down. The top outer peripheral wall of the mounting seat (303) is provided with an annular groove (302), and the annular groove (302) and the outer wall of the mounting seat (303) are connected. A compression spring (2) is installed in the annular groove (302), and the top of the compression spring (2) is in contact with the bottom of the guide cavity (1011). The top of the mounting seat (303) is provided with a guide cavity (1011). 1) an internally extending guide column (301), the outer wall of the guide column (301) being in sliding friction connection with the inner wall of the guide cavity (1011); the lower surface of the mounting seat (303) is inwardly recessed to form a hemispherical groove, a universal ball (305) is installed in the hemispherical groove, a plurality of small rollers (304) are also installed in the gap between the inner wall of the hemispherical groove and the universal ball (305), and an annular end cover (306) is also installed at the bottom of the mounting seat (303); It also includes a foot sleeve (4) tightly fitted onto the supporting foot section (102), the bottom of the foot sleeve (4) is provided with a through hole connected to the mounting cavity (1021) for the universal ball (305) to pass through, and the inner diameter of the through hole is smaller than the inner diameter of the mounting cavity (1021).

2. The movable support leg according to claim 1, characterized in that: The inner diameter of the annular end cover (306) is smaller than the diameter of the universal ball (305).

3. The movable support leg according to claim 2, characterized in that: The inner diameter of the annular groove (302) is greater than the inner diameter of the guide cavity (1011).

4. The movable supporting leg according to claim 3, characterized in that: An annular flange (401) is extended downwardly from the bottom of the foot sleeve (4), and the inner diameter of the annular flange (401) is equal to the inner diameter of the through hole at the bottom of the foot sleeve (4).

5. The movable supporting leg according to claim 4, characterized in that: The length of the mounting cavity (1021) is greater than the length of the mounting seat (303).

6. The movable supporting leg according to claim 5, characterized in that: The cross sections of the support section (101) and the support foot section (102) are square or circular.

7. The movable supporting leg according to claim 6, characterized in that: The outer surface of the support leg section (102) is provided with a plurality of clamping protrusions (1022) at intervals, and the inner surface of the leg sleeve (4) is provided with a plurality of clamping grooves (402) corresponding to and matching the clamping protrusions (1022) at intervals.

8. The movable supporting leg according to claim 7, characterized in that: The bottom of the annular flange (401) is also provided with an anti-wear layer (403) having the same inner diameter and outer diameter as the annular flange (401), and the anti-wear layer (403) is made of rubber.

9. The movable supporting leg according to claim 8, characterized in that: The guide column (301), the mounting seat (303), the small rollers (304), the universal ball (305) and the annular end cover (306) are made of carbon steel.

10. The movable supporting leg according to claim 9, characterized in that: The material of the compression spring (2) is carbon steel.