Chain unit, chain structure, and screen device including the chain structure

Abstract

This invention provides a chain unit, a chain structure, and a screen device including the chain structure. The chain unit includes a limiting part and a connecting part. The limiting part has a limiting groove and at least one pivot hole, and its side has a shielding rib. The connecting part has at least one pivot protrusion, configured to pivotally accommodate in the limiting groove of an adjacent chain unit, and the pivot protrusion is correspondingly pivotally connected to the pivot hole of the adjacent chain unit. This allows multiple chain units to be connected to form a bendable chain structure, which can be applied to a screen device. Through the bending of the chain structure, the door unit of the screen device can be guided to slide horizontally to unfold or retract the mesh screen, thereby effectively blocking outdoor mosquitoes from entering the room.

Claims

1. A chain unit configured for pivotal connection with an adjacent chain unit, wherein the chain unit comprises: A limiting part has a limiting groove and at least one pivot hole. A blocking rib is protruding from one side of the limiting part. The upper and lower edges of the blocking rib are respectively at a distance from the upper and lower edges of the limiting part. A connecting part is connected to the limiting part and has at least one pivot protrusion. The connecting part is configured to be pivotally mounted in the limiting groove of the other chain unit, and the pivot protrusion is correspondingly pivotally mounted in the pivot hole of the other chain unit.

2. The chain unit as claimed in claim 1, wherein the blocking rib includes an extension and a stop, the extension extending from the surface of the limiting portion and the stop connected to the edge of the extension away from the limiting portion.

3. The chain unit as claimed in claim 1, wherein the shielding rib has a first side and a second side opposite to each other, the first side being further away from the connecting portion than the second side, and the first side being provided with an abutment portion disposed to abut against the lower edge of the second side of the other chain unit.

4. The chain unit as described in claim 1, wherein the limiting part has a notch, the connecting part has a notch, the notch is provided corresponding to the notch of the other chain unit, and together define a pivoting space for pivoting.

5. The chain unit as claimed in claim 2, wherein the stop is parallel to the limiting portion or inclined at an angle relative to the limiting portion.

6. A chain structure comprising a plurality of chain units as described in any one of claims 1 to 5, the chain units being pivotally connected to each other.

7. A screen device, comprising: One outer frame unit; A door unit is housed within the outer frame unit; A guide unit is disposed within the door unit, wherein the guide unit includes two chain structures as described in claim 6, the chain structures being disposed at the bottom of the door unit and collectively defining a sliding groove; and a mesh screen is disposed on the door unit and slidably disposed in the sliding groove.

8. The screen device as described in claim 7, wherein the door unit is provided with a retracting mechanism and a movable frame, the retracting mechanism being disposed on one side of the outer frame unit, and the movable frame being slidably disposed within the outer frame unit relative to the retracting mechanism, wherein... One end of the mesh screen is connected to the winding mechanism, and the other end is connected to the movable frame.

9. The screen device as described in claim 8, wherein the chain structures include: The first section is a sliding section located within the movable frame; And a second section, which slides on a track below the outer frame unit; wherein the chain structure remains bent as the movable frame slides, and the lengths of the first section and the second section will vary with the position of the movable frame relative to the winding mechanism.

10. The screen device as described in claim 9, wherein, When the movable frame slides toward the winding mechanism, the number of chain units contained in the first section increases and the number of chain units contained in the second section decreases; when the movable frame slides away from the winding mechanism, the number of chain units contained in the first section decreases and the number of chain units contained in the second section increases.

11. The screen device as claimed in claim 8, wherein the outer frame unit comprises: Two vertical supports arranged parallel to each other, an upper track connected to the upper end of the vertical supports, and a lower track connected to the lower end of the vertical supports, wherein the winding mechanism is disposed in one of the vertical supports.

12. The screen device as claimed in claim 11, wherein the guide unit includes a first cable adjustment base group comprising two first cable adjustment bases and a first fixing line, wherein the first cable adjustment bases are respectively disposed at the upper and lower ends of the uprights, and the first fixing line passes through the movable frame and is connected to the first cable adjustment bases at opposite ends; and a second cable adjustment base group comprising a second cable adjustment base and a second fixing line, wherein the second cable adjustment base is disposed on one of the uprights, the second fixing line passes through the movable frame and is connected at one end to the second cable adjustment base, and the other end is connected via a spring structure to one end of the chain structure disposed in the movable frame; wherein the first fixing line and the second fixing line are alternately arranged in the movable frame.

13. The screen device as described in claim 12, wherein the first junction box and the second junction box each comprise: A frame is set on the corresponding upright; An adjustment shaft is pivotally mounted in the seat frame and is rotatable relative to the seat frame; wherein the adjustment shaft is connected to the end of a corresponding fixed line and is rotatable to adjust the tension of the first fixed line and the second fixed line.

14. The screen device as claimed in claim 12, wherein the first fixing line and the second fixing line are received in the upper track in the upper path and pass through a guide groove provided in the lower track in the lower path, and the guide groove is shielded by a wire shielding portion provided in the lower track.

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