NOVEL DIAL-TYPE WINDOW LOCK

• US 20110271720A1
• Filed: 08/10/2010
• Published: 11/10/2011
• Est. Priority Date: 05/04/2010
• Status: Abandoned Application

• Current Assignee: Cmech Guangzhou Industrial Ltd.
• Original Assignee: Cmech Guangzhou Industrial Ltd.
• Inventors: Zheng, Daqiang
• Application Number:
  US12/853,343
• Publication Number:
  US 20110271720A1
• Time in Patent Office: Days
• US Class Current: 70/89
• CPC Class Codes: E05B 15/006 Spring-biased ball or roller entering a notch
• CPC Class Codes: E05C 3/042 the handle being at one side, the bolt at the other side or inside the wing
• CPC Class Codes: E05C 3/046 in the form of a crescent-shaped cam hooks E05C3/045
• CPC Class Codes: Y10T 70/5146 Window

Abstract

The present utility model discloses a novel dial-type window lock, comprising a lock body, a lock catch member and a dial handle, wherein the lock body is provided with a bush allowing a square shaft of the dial handle to movably pass there through, the lock catch member and the dial handle are respectively provided on internal and external sides of the lock body and remain linked to each other via the square shaft of the dial handle; the window lock further comprises an elastic seizure mechanism which allows for achievement of quick positioning when the lock catch member shifts between locked and opened states and which comprises an elastic seizure assembly disposed on the lock catch member and a snap slot disposed on the lock body and snap engaged with and interference fitted with the elastic seizure assembly. The present utility model has the following advantageous effects as compared with the prior art: 1. the window lock is small and compact in structure, easy to process and manufacture and feel good to operate; 2. The window lock is pragmatic and reliable with a long service life. Experimental data reveals that when the window lock is opened 70,000 times or more than 70,000 times, it is still functionally intact.

Claims

1. A novel dial-type window lock, comprising a lock body, a lock catch member and a dial handle, wherein the lock body is provided with a bush allowing a square shaft of the dial handle to movably pass there through, the lock catch member and the dial handle are respectively provided on internal and external sides of the lock body and remain linked to each other via the square shaft of the dial handle, characterized in that the window lock further comprises an elastic seizure mechanism which allows for achievement of quick positioning when the lock catch member shifts between locked and opened states and which comprises an elastic seizure assembly disposed on the lock catch member and a snap slot disposed on the lock body and snap engaged with and interference fitted with the elastic seizure assembly.

2. The novel dial-type window lock according to claim 1, characterized in that the lock catch member is provided with a receiving cavity which has an opening and is used to place the elastic seizure assembly, and in that an axial direction of the receiving cavity is parallel with or perpendicular to an axial direction of the bush.

3. The novel dial-type window lock according to claim 2, characterized in that the elastic seizure assembly comprises a telescopic spring and a ball, wherein the telescopic spring is disposed in the receiving cavity, the telescopic direction of the telescopic spring is parallel to the axial direction of the bush, and both ends of the telescopic spring respectively abut against and cooperate with an inner bottom of the receiving cavity and the ball, and in that part of a spherical surface of the ball extends out of the opening of the receiving cavity.

4. The novel dial-type window lock according to claim 3, characterized in that an inner wall of the lock body is provided with an arcuate guide rail corresponding to a rolling trajectory of the ball and being in a rolling and contacting cooperation with the ball, and at both ends of the arcuate guide rail are respectively provided snap slots snap engaged with and interference fitted with the ball.

5. The novel dial-type window lock according to claim 2, characterized in that the elastic seizure assembly comprises a telescopic spring, a slider and a ball, wherein the telescopic spring is disposed in the receiving cavity, the telescopic direction of the spring is perpendicular to the axial direction of the bush, and both ends of the telescopic spring respectively abut against and cooperate with an inner bottom of the receiving cavity and an inner end of the slider, in that an outer end of the slider is provided a groove for placing the ball, and in that part of a spherical surface of the ball extends out of the opening of the receiving cavity.

6. The novel dial-type window lock according to claim 5, characterized in that an arcuate outer wall of the bush of the lock body is in a rolling and contacting cooperation with the ball, and on the arcuate outer wall on an extension line of a diameter of an inner circle of the bush are provided snap slots which are snap engaged with and interference fitted with the ball.

7. The novel dial-type window lock according to claim 4, characterized in that an inclined guide surface is provided on the inner wall of each of the snap slots.