Pull-out table limiting shaft lifting structure

Abstract

This utility model discloses a lifting structure for a pull-out table with a limiting shaft, including a limiting shaft, a bearing sleeve, and a locking device. The limiting shaft is fixed to the secondary rail of the extended table frame, the locking device is fixed to the main table frame, and the bearing sleeve is fitted onto the limiting shaft and can rotate around the limiting shaft. The locking device has an L-shaped groove, into which the bearing sleeve on the limiting shaft engages, with the outer surface of the bearing sleeve contacting the inner wall of the groove. A fastener for limiting the bearing sleeve is detachably provided at the end of the limiting shaft. In this utility model, the bearing sleeve fitted onto the limiting shaft allows the bearing sleeve to rotate around the limiting shaft when it contacts the locking device, reducing friction between the limiting shaft and the inner wall of the groove during lifting, thus making it easier to lift the extended table.

Description

Technical Field

[0001] This utility model relates to the field of pull-out table technology, and in particular to a pull-out table limit shaft lifting structure. Background Technology

[0002] Pull-out tables can be used to place items. The tabletop can be extended. Existing pull-out tables include a main tabletop and an extension tabletop. To extend, the extension tabletop is first pulled out from the main tabletop, and then raised to the same height as the main tabletop. The extension tabletop needs to be secured by a limiting structure. After the limiting shaft engages with the locking mechanism, the tabletop is raised to fix it in place. There is significant friction between the limiting shaft and the locking mechanism during the raising process, making it relatively difficult to raise. Utility Model Content

[0003] To address the aforementioned problems, this utility model aims to provide a lifting structure for the limiting shaft of a pull-out table, thereby solving the problem of laborious lifting of the limiting shaft of a pull-out table.

[0004] The technical problem solved by this utility model can be achieved by the following technical solution: a lifting structure for a pull-out table with a limiting shaft, including a limiting shaft, a bearing sleeve, and a clamp. The limiting shaft is fixed on the secondary rail of the extended table frame, the clamp is fixed on the main table frame, the bearing sleeve is sleeved on the limiting shaft, and the bearing sleeve can rotate around the limiting shaft. The clamp is provided with a groove, and the bearing sleeve on the limiting shaft is engaged in the groove, with the outer surface of the bearing sleeve contacting the inner wall of the groove. A fastener for limiting the bearing sleeve is detachably provided at the end of the limiting shaft.

[0005] The fastener is a screw, with the screw head covering the outer end of the bearing sleeve, and the screw head restricting the bearing sleeve to the limiting shaft.

[0006] The rear end of the limiting shaft has a larger diameter and the front end has a smaller diameter, and the bearing sleeve is fitted onto the front end of the limiting shaft with the smaller diameter.

[0007] The card slot on the card is L-shaped, with the side end of the card slot being the inlet end, the front section of the card slot being horizontal, and the rear section of the card slot being vertical.

[0008] The card slot has a first rounded corner on both sides of the inlet end, and a second rounded corner at the turning point of the card slot.

[0009] The clips are fixed to the main table frame by a bracket. Two clips are symmetrically arranged on the main table frame. Limiting shafts are symmetrically arranged on the inner end of the secondary rail of the extended table frame. The two clips are connected by a connecting rod.

[0010] Compared with the prior art, this utility model has the following advantages: This utility model achieves the limitation of the extension table panel with the main table panel when it is pulled out by the cooperation of the limiting shaft and the card. The limiting shaft is fitted with a bearing sleeve. When the limiting shaft contacts the card, the bearing sleeve will rotate around the limiting shaft, reducing the friction between the limiting shaft and the inner wall of the card slot when the limiting shaft rises, making it easier to lift the extension table panel. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the limiting shaft and the bearing sleeve;

[0013] Figure 3 This is a schematic diagram of the structure of the limiting shaft and the bearing sleeve;

[0014] Figure 4 This is a schematic diagram of the limiting shaft.

[0015] Figure 5 This is a structural diagram of the card;

[0016] Figure 6 This is a schematic diagram of the installation structure of this utility model;

[0017] In the diagram: 1-Limiting shaft, 2-Bearing sleeve, 3-Screw, 4-Clamping device, 5-Bracket, 6-Extension table frame secondary rail, 7-Main table frame, 8-Connecting rod, 41-Slot, 42-First fillet, 43-Second fillet, 44-Inlet end. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Combined with appendix Figures 1 to 6As shown, this embodiment discloses a lifting structure for a pull-out table with a limiting shaft, including a limiting shaft 1, a bearing sleeve 2, fasteners, and a clamp 4. The limiting shaft 1 is fixed on the secondary rail 6 of the extended table frame, and the clamp 4 is fixed on the main table frame 7. The bearing sleeve 2 is sleeved on the limiting shaft 1 and can rotate around the limiting shaft 1. The clamp 4 is provided with a groove 41, and the bearing sleeve 2 on the limiting shaft 1 is inserted into the groove 41. The outer surface of the bearing sleeve 2 is in contact with the inner wall of the groove 41.

[0021] The end of the limiting shaft 1 is detachably provided with a fastener for limiting the bearing sleeve 2. The fastener is a screw 3, the head of which covers the outer end of the bearing sleeve 2, and the head of the screw 3 restricts the bearing sleeve 2 to the limiting shaft 1.

[0022] The rear end of the limiting shaft 1 has a larger diameter and the front end has a smaller diameter. The bearing sleeve 2 is fitted onto the front end of the limiting shaft 1 with the smaller diameter. The bearing sleeve 2 is fitted onto the smaller diameter end of the limiting shaft 1 and is confined between the screw head and the larger diameter end of the limiting shaft 1. The bearing sleeve 2 will rotate when it is inserted into the slot of the clip and will not detach from the limiting shaft 1.

[0023] The slot 41 on the clamp 4 is L-shaped, with the side end of the slot 41 being the inlet end 44. The front section of the slot 41 is horizontal, and the rear section is vertical. A first rounded corner 42 is provided on both sides of the inlet end of the slot 41, and a second rounded corner 43 is provided at the transition between the horizontal and vertical sections of the slot 41. When the bearing sleeve 2 at the end of the limiting shaft 1 is engaged in the slot, the rounded corners allow the bearing sleeve 2 to move more smoothly within the slot.

[0024] like Figure 6 As shown, the locking piece 4 is fixed to the main table frame 7 by the bracket 5. Two locking pieces 4 are symmetrically arranged on the main table frame 7. Limiting shafts 1 are symmetrically arranged on the inner end of the extension table frame sub-rail 6. The two locking pieces are connected by a connecting rod 8. In use, the limiting shaft 1 is inserted into the slot 41 from the inlet end of the slot 41. The bearing sleeve 2 on the limiting shaft 1 will contact the inner wall of the slot 41 and rotate around the limiting shaft 1. The limiting shaft 1 first moves horizontally a certain distance to the turning point of the slot 41, and then the extension table is raised. The limiting shaft 1 also moves upward accordingly. Since the rolling friction between the bearing sleeve 2 and the slot wall is less than the sliding friction between the limiting shaft and the slot wall, the extension table is raised more easily.

[0025] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the utility model. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A lifting structure for a pull-out table with a limiting shaft, comprising a limiting shaft (1) and a locking member (4), wherein the limiting shaft (1) is fixed on an extension table frame sub-rail (6), and the locking member (4) is fixed on a main table frame (7), characterized in that: It also includes a bearing sleeve (2), which is fitted on the limiting shaft (1). The bearing sleeve (2) can rotate around the limiting shaft (1). The clamp (4) is provided with a groove (41). The bearing sleeve (2) on the limiting shaft (1) is inserted into the groove (41). The outer surface of the bearing sleeve (2) is in contact with the inner wall of the groove (41).

2. The pull-out table limiting shaft lifting structure according to claim 1, characterized in that: The end of the limiting shaft (1) is detachably provided with a fastener to limit the bearing sleeve (2).

3. The pull-out table limiting shaft lifting structure according to claim 2, characterized in that: The fastener is a screw (3), the screw (3) cap covers the outer end of the bearing sleeve (2), and the screw (3) cap restricts the bearing sleeve (2) on the limiting shaft (1).

4. The pull-out table limiting shaft lifting structure according to claim 1, characterized in that: The rear end diameter of the limiting shaft (1) is large and the front end diameter is small. The bearing sleeve (2) is fitted on the front end of the limiting shaft (1) with the small diameter.

5. The pull-out table limiting shaft lifting structure according to claim 1, characterized in that: The slot (41) on the card (4) is L-shaped. The side end of the slot (41) is the inlet end. The front section of the slot (41) is horizontal and the rear section of the slot (41) is vertical.

6. The pull-out table limiting shaft lifting structure according to claim 1, characterized in that: The inlet end of the card slot (41) is provided with a first rounded corner (42) on both sides, and the turning point of the card slot (41) is provided with a second rounded corner (43).

7. The pull-out table limiting shaft lifting structure according to claim 1, characterized in that: The card (4) is fixed on the main table frame (7) by the bracket (5). Two card (4) are symmetrically arranged on the main table frame (7). Limiting shafts (1) are symmetrically arranged on the inner end of the extension table frame sub-rail (6). The two card are connected by a connecting rod (8).

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