Bed height adjustment device

Abstract

An adjustment device maintains center alignment by linearly sliding a roller assembly along a track assembly. The roller assembly includes a roller base and multiple rollers arranged at inclines relative to each other on either side of the roller base. The track assembly includes a track and two guide surfaces at different angles, which guide the linear movement of each roller, causing the roller base to converge. This adjustment device is suitable for adjusting the height of a bed. Utilizing a track-guided roller mechanism, it maintains center alignment through converging motion, eliminating wobbling during lifting and lowering, improving the stability of bed lifting, and reducing friction noise, effectively overcoming the long-standing drawbacks of previous technologies.

Claims

1. A bed height adjustment device, comprising: A roller assembly (51) includes: a roller seat (52); a plurality of rollers (55) arranged at inclinations to each other on both sides of the roller seat (52) in the axial direction; and a track assembly (70) includes: a track (64) and two guide surfaces (65) with different angles, the two guide surfaces (65) guiding each of the rollers (55) to move linearly, causing the roller seat (52) to generate a converging motion; wherein the roller assembly (51) remains centered when it slides linearly along the track assembly (70).

2. The bed height adjustment device as described in claim 1, wherein, The track assembly (70) also includes two friction pad groups (71), which are respectively disposed on the corresponding guide surfaces (65) of the track (64), so that the roller (55) rolls and rubs against the friction pad groups (71).

3. The bed height adjustment device as described in claim 2, wherein, The friction pad assembly (71) includes: a contact pad (72) that maintains a rolling friction relationship with the roller (55); and a buffer pad (73) disposed on the guide surface (65) of the track (64). The buffer pad (73) is attached to the back side of the contact pad (72) to reduce the force exerted by the roller (55) on the front side of the contact pad (72).

4. The bed height adjustment device as described in claim 3, wherein, Both the roller (55) and the contact piece (72) are made of metal.

5. The bed height adjustment device as described in claim 3, wherein, Both the roller (55) and the contact piece (72) are made of non-metallic materials.

6. The bed height adjustment device as described in claim 3, wherein, The roller (55) is made of metal, and the contact piece (72) is made of a non-metallic material with a softer hardness.

7. The bed height adjustment device as described in claim 3, wherein, The contact piece (72) is made of metal, and the roller (55) is made of a non-metallic material with a lower hardness.

8. The bed height adjustment device as claimed in claim 1, wherein, The adjustment device (50) is installed on a bed (10), which includes: a main frame (11) having a front end and a rear end; two sub-frames (16) respectively located at the front end and rear end of the main frame (11), and a roller seat (52) located on the opposite side (36) of the sub-frames (16); and two support members (20) respectively inserted into the corresponding sub-frames (16), and a track (64) located on the outside (37) of the support member (20) to guide the roller (55) to drive the sub-frame (16) and the support member (20) to slide relative to each other, so that the main frame (11) maintains a variable height from the ground.

9. The bed height adjustment device as claimed in claim 8, wherein, The roller assembly (51) further includes: a fixed seat (60) disposed on the opposite side (36) of the sub-frame (16), the fixed seat (60) surrounding the outside of the roller seat (52); and an adjusting screw (58) locked into the sub-frame (16), connected to the roller seat (52) via the fixed seat (60), for adjusting the displacement of the roller seat (52) relative to the fixed seat (60).

10. The bed height adjustment device as claimed in claim 9, wherein, The fixed base (60) has a plurality of spacers (62) on the part facing the roller seat (52), and the spacers (62) separate the fixed base (60) from the roller seat (52).

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