BACKGROUND
1. Technical Field
The disclosure generally relates to rack-stop structures, especially for a gear stop structure for a door or window.
2. Description of Related Art
A traditional stop structure includes friction tabs to support a door or a window at an open state. The friction tabs are mounted to the door or window and a frame, and are rotatable relative to each other. When the door or window is opened, the friction tabs rotate relative to each other. The door or window can be stopped at a desired angle by friction force between the friction tabs. However, after many uses, the friction force can disappear. There is a room for improvement within the art.
BRIEF DESCRIPTION OF THE DRAWINGS
Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
FIG. 1 is an exploded, isometric, and cutaway view of a rack-stop structure of one embodiment.
FIG. 2 is a partially exploded, cutaway view of a bracket of the rack-stop structure of FIG. 1.
FIG. 3 is an assembled view of the rack-stop structure of FIG. 1 shown in one state.
FIG. 4 is a cross-sectional view of the rack-stop structure of FIG. 3.
FIG. 5 is similar to FIG. 4, but shown in a folded state.
FIG. 6 is similar to FIG. 5, but a pin is moved to an escaping slideway from a positioning slideway.
DETAILED DESCRIPTION
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.”
FIG. 1 illustrates one embodiment of a rack-stop structure for adjusting an angle between a door 100 and a frame 200. The door 100 is pivotable about the frame 200. A recess 202 is defined in the frame 200 to receive the rack-stop structure.
The rack-stop structure includes a bracket 10, a bar 30, and a pull spring 50.
The bar 30 includes a rod 31, a pin 33, and a fixing tab 35. The fixing tab 35 is mounted to a first end of the rod 31 and the fixing tab 35 is rotatable relative to the rod 31. The pin 33 protrudes out from a second end of the rod 31. The second end of the rod 31 is slideable on the bracket 10.
FIG. 2 illustrates a partial isometric view of the rack-stop structure. The bracket 10 includes a body 11, a plurality of escaping tabs 13, and a plurality of flaps 1152. The body 11 includes a sidewall 111, two positioning walls 113, and a pair of escaping rails 115. The two positioning walls 113 are substantially parallel to each other and are substantially perpendicular to the sidewall 111. The body 11 is substantially U-shaped. A positioning slideway 1139 and an escaping slideway 1159 are defined in the body 11. Two opposite ends of the escaping slideway 1159 communicate with two opposite ends of the positioning slideway 1139. The positioning slideway 1139 includes two positioning slots 1132. Each of the two positioning slots 1132 are defined in each of the two positioning walls 113. The escaping slideway 1159 is defined between the pair of escaping rails 115. A cross-section of each of the pair of the escaping rails 115 is substantially L-shaped. Each of the two positioning walls 113 includes a plurality of position portions 1135. A connecting surface 1136 is defined in each side of plurality of position portions 1135, and a plurality of engaging cutouts 1137 is defined in each of the plurality of position portions 1135. Each connecting surface 1136 is substantially slanted relative to a first direction. The plurality of engaging cutouts 1137 can restrict the pin 33 from moving along the first direction. The plurality of flaps 1152 is located on one side of the escaping slideway 1159. The plurality of flaps 1152 can be biased away from the escaping slideway 1159. The plurality of escaping tabs 13 is located in each positioning slot 1132. The plurality of positioning portions 1135 is spaced by each of the plurality of escaping tabs 13. Each of the plurality of escaping tabs 13 is pivoted to each escaping rail 115. A free end of each of the plurality of the escaping tabs 13 abuts each connecting surface 1136. A first coil spring 131 is located on each escaping tab 13. A second coil spring 151 is located on each flap 1152.
FIG. 3 and FIG. 4 are two assembled views of the door 100, the frame 200, and the rack-stop structure. In assembly, the door 100 is rotatable relative to the frame 200. The bracket 11 is mounted to the door 100. The first end of the rod 31 is mounted to the frame 200. The pull spring 50 is mounted to the rod 31 and the frame 200 to pull the bar 30 away from the bracket 10. The pin 33 is engaged in the positioning slideway 1139 between the two positioning walls 113.
FIG. 5 illustrates a cross-section of the rack-stop structure in a folded state, and FIG. 6 is similar to FIG. 5, but in an unfolded state. In the folded state, the door 100 is folded relative to the frame 200, and the pin 33 is located on an end of the slideway 1139. When the door 100 is opened relative to the frame 200, the pin 33 slides on each connecting surface 1136 substantially along a second direction. The second direction is substantially opposite to the first direction. The pin 33 can go over the positioning portion 1135 and the escaping tab 13 in the positioning slideway 1139. The escaping tab 13 can resiliently rotate away from the connecting surface 1136 urged by the pin 33. When the door 100 stops rotating relative to the frame 200, the pin 33 moves back under a pulling force of the pull spring 50. If the pin 33 meets the engaging recess 1137, the pin 33 engages with the engaging recess 1137 along the first direction. If the pin 33 meets the escaping tab 13, the pin 33 moves to the escaping slideway 1159 from the positioning slideway 1139 through the plurality of the escaping tabs 13 along the first direction, and the flap 1152 is biased by the pin 33. Thus, the door 100 can be stopped at predefined angles when the pin 33 is engaged with one of the plurality of engaging recesses 1137, and the door 100 can move back to the unfolded state when the pin 33 moves to the escaping slideway 1159.
It is to be understood, however, that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Grant
9273500
