Winding mechanism and lamp

Patent metadata

Field	Value
Publication number	US-11828446-B2
Application number	US-202318104778-A
Country	US
Kind code	B2
Filing date	Feb 1, 2023
Priority date	Dec 29, 2021
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A winding mechanism includes a housing, an inner cylinder and a wire. The housing is formed with an accommodating space therein. An inner surface of the housing is formed with an internal thread structure. The inner cylinder is disposed in the accommodating space and defines a central axis. An outer surface of the inner cylinder is formed with an external thread structure. The external thread structure is cooperated with the internal thread structure. The inner cylinder is capable of displacing along the central axis by rotating relative to the housing. The external thread structure includes at least two contact portions and at least two non-contact portions, and gaps are formed between the non-contact portions of the external thread structure and the internal thread structure. An end of the wire is connected to the inner cylinder and is wound along the external thread structure of the inner cylinder.

First claim

What is claimed is:

1. A winding mechanism, comprising:
a housing formed with an accommodating space therein, wherein an inner surface of the housing is formed with an internal thread structure;
an inner cylinder disposed in the accommodating space, wherein the inner cylinder defines a central axis, an outer surface of the inner cylinder is formed with an external thread structure, the external thread structure is cooperated with the internal thread structure, the inner cylinder is capable of displacing along the central axis by rotating relative to the housing, the external thread structure comprises at least two contact portions and at least two non-contact portions, and gaps are formed between the non-contact portions of the external thread structure and the internal thread structure; and
a wire, wherein an end of the wire is connected to the inner cylinder and is wound along the external thread structure of the inner cylinder, and as the inner cylinder is displaced along the central axis by rotating relative to the housing, a portion of the wire is capable of being wound around or separated from the external thread structure of the inner cylinder.

2. The winding mechanism of claim 1 , wherein the external thread structure comprises a plurality of threads, at least one of the contact portions and at least one of the non-contact portions are formed at one of the plurality of threads, and the at least two contact portions are respectively located at two of the plurality of threads.

3. The winding mechanism of claim 1 , wherein the external thread structure comprises a plurality of threads, and the at least two contact portions and the at least two non-contact portions are formed at one of the plurality of threads.

4. The winding mechanism of claim 1 , wherein a projection of the external thread structure on a plane perpendicular to the central axis is an ellipse or a regular polygon, and a projection of the internal thread structure on the plane perpendicular to the central axis is a circle.

5. The winding mechanism of claim 1 , wherein the external thread structure comprises a plurality of threads, and projections of the plurality of threads on a plane perpendicular to the central axis vary in angle.

6. The winding mechanism of claim 1 , wherein the external thread structure comprises a plurality of threads, a thread groove is disposed between two of the plurality of threads adjacent to each other, and the thread groove has an arc-shaped bottom surface.

7. The winding mechanism of claim 1 , wherein:
as the inner cylinder displaces along the central axis from a bottom end of the housing to a top end of the housing, a portion of the wire is capable of being wound around the external thread structure of the inner cylinder, such that a length of the wire exposed from the housing is shortened; and
as the inner cylinder displaces along the central axis from the top end of the housing to the bottom end of the housing, a portion of the wire is capable of being separated from the external thread structure of the inner cylinder, such that a length of the wire exposed from the housing is lengthened.

8. The winding mechanism of claim 1 , wherein the housing comprises a first body and a second body, the first body is configured to be fixed on an external support, a relative position between the first body and the external support is fixed, and the internal thread structure is formed on the second body.

9. The winding mechanism of claim 1 , wherein the housing further comprises a guiding structure, and the wire enters the accommodating space or leaves the accommodating space through the guiding structure.

10. The winding mechanism of claim 9 , wherein the guiding structure comprises:
a concave groove formed on an outer surface of the housing.

11. The winding mechanism of claim 9 , wherein the guiding structure comprises:
a lug extending from a bottom end of the housing, wherein the lug is formed with a through hole, and the wire passes through the through hole.

12. The winding mechanism of claim 1 , further comprising:
a dynamic elastic member disposed in the accommodating space, wherein a central pole is formed at a bottom end of the housing, an end of the dynamic elastic member is connected to the central pole of the housing, another end of the dynamic elastic member is connected to the inner cylinder, and the dynamic elastic member is configured to provide kinetic energy for the inner cylinder to rotate relative to the housing.

13. The winding mechanism of claim 12 , wherein the dynamic elastic member is a planar spiral spring.

14. The winding mechanism of claim 12 , wherein a free length of the dynamic elastic member parallel to the central axis is L0, a length of the inner cylinder parallel to the central axis is L1, and the following condition is satisfied:
L0<L1.

15. A lamp, comprising:
the winding mechanism of claim 1 , wherein the winding mechanism is suspended on an external support; and
a lamp body connected to another end of the wire.

16. A lamp, comprising:
the winding mechanism of claim 12 , wherein the winding mechanism is suspended on an external support; and
a lamp body connected to another end of the wire.

17. The lamp of claim 16 , wherein the lamp has a kinetic friction and a maximum static friction, and a gravity force is exerted on the lamp body;
when the inner cylinder is in a static state relative to the housing, a magnitude of a resultant force of the gravity force exerted on the lamp body and an elastic restoring force of the dynamic elastic member is a first value, and a friction corresponding to the first value is smaller than the maximum static friction of the lamp;
when a first external force is exerted downward on the winding mechanism, a magnitude of a resultant force of the first external force, the gravity force exerted on the lamp body and the elastic restoring force of the dynamic elastic member is a second value, and a friction corresponding to the second value is greater than the maximum static friction of the lamp, such that the inner cylinder is capable of rotating relative to the housing and entering to a rotating state from the static state, and till the first external force is removed to reduce the second value to the first value, the inner cylinder stops rotating relative to the housing.

18. The lamp of claim 16 , wherein the lamp has a kinetic friction and a maximum static friction, and a gravity force is exerted on the lamp body;
when the inner cylinder is in a static state relative to the housing, a magnitude of a resultant force of the gravity force exerted on the lamp body and an elastic restoring force of the dynamic elastic member is a first value, and a friction corresponding to the first value is smaller than the maximum static friction of the lamp;
when a second external force is exerted upward on the winding mechanism, a magnitude of a resultant force of the second external force, the gravity force exerted on the lamp body and the elastic restoring force of the dynamic elastic member is a third value, and a friction corresponding to the third value is greater than the maximum static friction of the lamp, such that the inner cylinder is capable of rotating relative to the housing and entering to a rotating state from the static state, and till the second external force is removed to reduce the third value to the first value, the inner cylinder stops rotating relative to the housing.

19. The lamp of claim 17 , wherein the kinetic friction or the maximum static friction comes fro

Assignees

• Radiant Opto Electronics Corp

Inventors

• Chen Chung-Kuang
• Huang guo-hao
• Ju Chih-Hung
• Chang Cheng-Ang

Classifications

• F21V21/38 Primary

  with a cable · CPC title

• B65H75/486

  Arrangements or adaptations of the spring motor · CPC title

• F21V21/15 Primary

  specially adapted for power operation, e.g. by remote control · CPC title

• F21V23/002

  Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm · CPC title

• B65H2701/34

  electric cords or electric power cables · CPC title