FASTENING DEVICE FOR PREVENTING SEPARATION OF INJECTION MOLDING PARTS

Abstract

The present invention relates to a fastening device for preventing the separation of injection molding parts, in which two parts formed of plastics by injection molding can be coupled to or decoupled from each other without using any additional coupling members through the improvement of the coupling structure thereof. To this end, in a fastening device for preventing the separation of injection molding parts, in which a first part (11) is formed with an elastic piece (12) having a coupling hole (13) to hold a hook (17) formed on a second part (14), the second part (14) has a coupling member (16) integrally formed at one side of the second part (14) and having a space part (15), equal to or larger than the thickness of the elastic piece (12) twice or more, and the hook (17) formed on the inside of the coupling member (16) so as to be held in the coupling hole (13) of the elastic piece (12), and the elastic piece (12) formed with the coupling hole (13) has a handle part (12a) to be exposed to the upper portion of the coupling member (16) so as to be positioned in the space part (15) of the coupling member (16) when the first part (11) and the second part (14) are coupled to each other.

Claims

1. A fastening device for preventing the separation of injection molding parts, in which a first part (11) is formed with an elastic piece (12) having a coupling hole (13) such that a hook (17) formed on a second part (14) is held in the coupling hole (13) so as to be held therein, characterized in that: the second part (14) has a coupling member (16), which is integrally formed at one side of the second part (14) and has a space part (15) equal to or larger than the thickness of the elastic piece (12) twice or more, the coupling member (16) has the hook (17) formed on the inside of the coupling member (16) so as to be held in the coupling hole (13) of the elastic piece (12), and the elastic piece (12) formed with the coupling hole (13) has a handle part (12a) formed to be exposed to the upper portion of the coupling member (16) when the first part (11) and the second part (14) are coupled to each other such that the elastic piece (12) is coupled so as to be positioned in the space part (15) of the coupling member (16).

2. The fastening device for preventing the separation of injection molding parts according to claim 1, wherein reinforcement pieces (18) are integrally formed at an upper portion and a lower portion on the outside of the coupling member (16).

Description

BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objectives, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which:

[0024] FIG. 1 is an exploded perspective view showing a prior art coupling device.

[0025] FIG. 2a to FIG. 2c are cross-sectional views showing the coupled states of a first part and a second part.

[0026] FIG. 3 is a cross-sectional view showing the procedure of separating the coupled first and second parts, which have been coupled to each other, from each other.

[0027] FIG. 4 is an exploded perspective view showing a coupling device according to the present invention.

[0028] FIG. 5a to FIG. 5c are cross-sectional views showing the coupled states of a first part and a second part, and

[0029] FIG. 6 is a cross-sectional view showing the procedure of separating the first part and the second part, which have been coupled to each other, from each other.

BRIEF EXPLANATION OF REFERENCE SIGNS

[0030] 11: first part 12: elastic piece

[0031] 12a: handle part 13: coupling hole

[0032] 14: second part 15: space part

[0033] 16: coupling member

[0034] 17: hook 18: reinforcement pieces

Best Mode for Carrying out the Invention

[0035] Hereinafter, reference will be now made to the preferred embodiments of the present invention with reference to the attached drawings in a manner sufficiently detail to be readily carried out by a person skilled in the art, to which the present invention belongs. The present invention can be implemented in various different ways and is not limited to the explained embodiments. It should be noted that the drawings are schematically illustrated but not scaled in proportion. Therefore, in the attached drawings, the relative dimensions and proportions of the components are illustrated to be more enlarged or reduced than they actually are in order to clarify the present invention, and a certain size is just illustrative but not limited thereto. In the drawings, the same structures, elements or parts have the same reference numerals so as to denote similar features even though they are illustrated in different figures.

[0036] FIG. 4 is an exploded perspective view showing a coupling device according to the present invention, FIG. 5a to FIG. 5c are cross-sectional views showing the coupled states of a first part and a second part, and FIG. 6 is a cross-sectional view showing the procedure of separating the first part and the second part, which have been coupled to each other, from each other. According to the present invention, a second part 14 has a coupling member 16, which is integrally formed at one side of the second part 14 and has a space part 15 equal to or larger than the thickness of an elastic piece 12 twice or more, the coupling member 16 has a hook 17 formed on the inside of the coupling member 16 so as to be held in a coupling hole 13 of the elastic piece 12, and the elastic piece 12 provided to a first part 11 so as to be coupled to the coupling member 16 has a handle part 12a formed to be exposed to the upper portion of the coupling member 16 when the first part 11 and the second part 14 are coupled to each other.

[0037] The coupling member 16 has reinforcement pieces 18, which are integrally formed at an upper portion and a lower portion on the outside thereof, and the reinforcement pieces 18 increase the strength of the coupling member 16 such that the coupling member 16 is not deformed even though external force is applied thereto, thereby stably securing the space part 15.

[0038] Hereinafter, the operations of the present invention structured as above will now be described in detail.

[0039] First, in order to couple the first part 11 and the second part 14 to each other, if the first part 11 is pushed in the direction of an arrow, as shown in FIG. 5a, in a state, in which the elastic piece 12, which is formed on the first part 11, is in close contact with the inclined surface 15a of the hook 15, which is formed on the inner surface of the coupling member 16, such that the elastic piece 12 formed on the first part 11 is positioned in the space part 15 of the coupling member 16 formed on the second part 14, then the elastic piece 12 is deformed outwards (left side in FIG. 5b) by an inclined surface 17a of the hook 17, as shown in FIG. 5b. After that, the hook 17 is fitted into the coupling hole 13 formed in the elastic piece 12, as shown in FIG. 5c, while the deformed elastic piece 12 is restored to the initial position thereof at a point where the hook 17 is in accordance with the coupling hole 13 formed in the elastic piece 12. Therefore, the elastic piece 12 comes into close contact with the inner surface of the coupling member 16 and the coupling work of the first part 11 and the second part 4 is finished.

[0040] In the case where the first part 11 and the second part 14 are to be separated for the purpose of repair and the like in a state, in which the first part 11 and the second part 14 are coupled to each other as described above, if the handle part 12a of the elastic member 12, exposed to the upper portion of the coupling member 16, is pushed in the direction of an arrow, as shown in FIG. 6, then the hook 17 which is fitted into the coupling hole 13 of the elastic piece 12 escapes from the coupling hole 13 while the elastic piece 12 is deformed in the left direction on FIG. 6, thereby enabling the separation of the first part 11 and the second part 14.

[0041] As described above, while the present invention has been particularly shown and described with reference to the example embodiments thereof, it will be understood by a person skilled in the art, to which the present invention belongs, that the above embodiments of the present invention are all exemplified and various changes, modifications and equivalents may be made therein without changing the essential characteristics and scope of the present invention. Therefore, it would be understood that the present invention is not limited to the forms described in the example embodiments and the technical and protective scope of the present invention shall be defined by the following claims. In addition, it should be also understood that all modifications, changes and equivalences within the technical scope of the present invention defined by the following claims belong to the technical scope of the present invention.