Airtight recessed box

Abstract

An airtight recessed box, characterized in that it consists of a housing (1), said housing (1) comprising a base plate and side plates surrounding the side walls of the base plate, long screws (2) are provided at the top of said housing (1), said long screw (2) is fitted with a locking clip (3), an oval hole (11) is provided on the side wall of said housing (1) passing through the upper part, and on the outer side below the oval hole (11) of said housing (1) is provided an inclined portion (12) sloping downwards, on the two sides at the bottom of said inclined portion (12) are provided two opposing projecting blocks (13). (Figure for abbreviation: Fig. 1)

Description

Title of the invention: Airtight recessed box technical field

[0001] The present invention relates to an airtight recessed box. Previous technique

[0002] The existing electrical accessory mounting box has a standard box structure, referred to in other countries as an airtight recessed box. This airtight recessed box is fixed in a pre-drilled cavity in the wall, which then receives a switch or a power outlet. During installation, the recessed box is fixed to the wall using locking clips. The end of the locking clip must be flattened or otherwise modified to prevent it from detaching when pushed in, which increases the manufacturing cost. Contents of the invention

[0003] The present invention proposes an airtight recessed box to prevent the locking clip from detaching.

[0004] The technical solution adopted within the framework of the present invention to solve the above technical problem is as follows:

[0005] An airtight recessed box, characterized in that it consists of a housing, said housing comprising a base plate and side plates surrounding the side walls of the base plate. Long screws are provided at the top of said housing, said long screw being fitted with a locking clip. An oval hole through the upper part is provided on the side wall of said housing, and on the outer side below the oval hole of said housing is an inclined portion sloping downwards. On the two sides at the bottom of said inclined portion are two opposing projecting blocks. Between each of the two sides of said inclined portion and the outer side wall of the housing is a gap. Said long screw comprises a nut and a stud. Said stud has a threaded portion in the middle. Between said threaded portion and the nut is an anti-loosening stop.The end of the stud has an unthreaded section.

[0006] Said locking clip is in a flattened structure, on said locking clip is provided a mounting hole matching the long screw, on the inner wall of said mounting hole is provided an internal thread, and said locking clip is provided with projections extending outwards on both sides of one end, said projections matching the empty spaces.

[0007] Characterized in that said anti-detachment stop part consists of a collar extending radially outwards and narrowing in a curved manner towards the threaded part.

[0008] Characterized in that two short screws are provided at the top of said housing, said short screws are intended for fixing a switch or a power outlet on the housing.

[0009] Characterized in that on said inclined part is provided a slender groove adapted to the long screw.

[0010] Characterized in that said locking clip is a flattened metal piece.

[0011] Characterized in that said locking clip is provided with several saw teeth on the other side opposite the projections.

[0012] Characterized in that it has two long screws.

[0013] Compared to the prior art, for the airtight flush-mounting box in the context of the present invention, the long screw is provided with an anti-loosening stop that prevents the long screw from coming out of the oval hole. The long screw is equipped with a locking clip and is matched to the inclined portion of the housing. When the long screw is turned, the threaded portion of the long screw is aligned with the threads of the mounting hole on the locking clip, thereby causing the locking clip to move upwards along the inclined portion, so that the saw teeth of the locking clip extend outwards from the housing. The protruding blocks can act as a limiting factor for the locking clip to prevent it from detaching. This is a simple structure that provides a firm locking mechanism. Brief description of the drawings

[0014] Fig. 1 shows a three-dimensional view of the airtight recessed box within the scope of the present invention.

[0015] Fig. 2 shows another three-dimensional view of the airtight recessed box within the scope of the present invention.

[0016] Fig. 3 shows a partial exploded view of the airtight recessed box within the scope of the present invention. Specific embodiments

[0017] The present invention will be described in more detail below in combination with the accompanying drawings of embodiments.

[0018] As shown in Figures 1 to 3, the airtight flush-mounting box consists of a housing 1, the housing 1 comprises a base plate and side plates surrounding the side walls of the base plate, at the top of the housing 1 are provided two long screws 2 and two short screws 4, the two long screws 2 and the two short screws 4 are respectively arranged symmetrically, and the short screws 4 are intended for fixing a switch or a power outlet on the housing 1.

[0019] Each long screw 2 is provided with a locking clip 3, on the side wall of the housing 1 is provided an oval hole 11 through the upper part, and on the outside side below the oval hole 11 of the housing 1 is provided an inclined part 12 which slopes from top to bottom, on the inclined part 12 is provided a slender groove 121 adapted to the long screw 2, on the two sides at the bottom of the inclined part 12 are provided two projecting blocks 13 opposed to each other, between each of the two sides of the inclined part 12 and the outer side wall of the housing 1 is provided a void 14.

[0020] The long screw 2 consists of a nut 21 and a stud. The stud has a threaded portion 22. Between the threaded portion 22 and the nut 21 is an anti-loosening stop portion 24. The anti-loosening stop portion 24 consists of a collar extending radially outwards and narrowing in a curved manner towards the threaded portion 22, so that once the long screw 2 is screwed into the oval hole 11, the anti-loosening stop portion 24 can pass through the oval hole 11 and the top of the anti-loosening stop portion 24 engages at the bottom of the oval hole 11, since the bottom of the anti-loosening stop portion 24 is curved, thus preventing the long screw 2 from coming out of the oval hole 11. At the end of the stud is provided an unthreaded portion. 23.

[0021] The locking clip 3 is a flattened metal piece, on the locking clip 3 is provided a mounting hole 31 matching the long screw 2, on the inner wall of the mounting hole 31 is provided an internal thread, and the locking clip 3 is provided with several saw teeth 32 on one end and projections 33 extending outwards on both sides of the other end, the projections 33 are matching the empty spaces 14, so that the locking clip 3 can move up and down along the empty spaces 14.

[0022] During the assembly of the airtight flush-mounting box, the locking clip 3 is first rotated so that the projections 33 are located respectively on the upper and lower sides, and the end of the locking clip 3 to which the projections 33 are provided rests against the bottom of the inclined part 12, then the locking clip 3 is rotated 90° so that the projections 33 of the locking clip 3 engage in the empty spaces 14. The long screw 2 is screwed into the oval hole 11 and matches the mounting hole 31 on the locking clip 3, so that the anti-detachment stop part 24 engages at the bottom of the oval hole 11.

[0023] When the nut 21 of the long screw 2 is turned using an electric screwdriver to install the airtight recessed box, the mounting hole 31 on the locking clip 3 being aligned with the threads of the threaded portion 22 of the long screw 2, the long screw 2, during tightening, causes the locking clip 3 to move from the bottom to top of the inclined part 12, so that the saw teeth 32 gradually extend outwards and thus hook onto the side wall in the housing on the wall, thus achieving the fixing of the airtight recessed box.

[0024] Since a non-threaded portion 23 is provided at the end of the long screw 2, once the locking clip 3 moves to the junction between the threaded portion 22 and the non-threaded portion 23, the anti-loosening stop portion 24 of the long screw 2 will engage at the bottom of the oval hole 11 on the housing 1, preventing the long screw 2 from coming out of the top of the oval hole 11. At the same time, once the locking clip 3 has come into contact with the two protruding blocks 13, if the long screw 2 is continued to be turned, the non-threaded portion 23 at the end of the long screw 2 will enter a semi-disengaged state with the mounting hole 31 on the locking clip 3.Since the long screw 2 is subjected to a counterclockwise rotational force when removed, the thread of the threaded part 22 of the long screw 2 is not in the same path as the thread in the mounting hole 31 on the locking clip 3, so that the long screw 2 cannot match the thread of the locking clip 3 and will enter a state of free rotation, this state prevents the long screw 2 from detaching from the housing 1 under the effect of the rotational force of the thread. During installation, the nut 21 moves forward under the effect of the applied clockwise force, so that the thread of the threaded part 22 of the long screw 2 is in the same path as the thread of the mounting hole 31 on the locking clip 3, this allows these two elements to engage with each other again, in order to drive the movement of the locking clip 3 towards the end of the housing 1.

[0025] The locking clip 3 never detaches from the long screw 2, the anti-detachment stop part 24 of the long screw 2 will hook the flush-mounting box and at the bottom of the inclined part 12 are provided two protruding blocks 13 which can play a limiting role of the locking clip 3, to prevent the locking clip 3 from detaching.

[0026] For the airtight flush-mounting box within the framework of the present invention, the long screw 2 is provided with an anti-detachment stop portion 24 which prevents the long screw 2 from coming out of the oval hole 11. The long screw 2 is equipped with a locking clip 3 and is matched to the inclined portion 12 on the housing 1. When turning the long screw 2, the threaded portion 22 of the long screw 2 is in the same path as the threads of the mounting hole 31 on the locking clip 3, so as to cause the locking clip 3 to move upwards along the inclined portion 12, so that the saw teeth 32 of the locking clip 3 extend outwards from the housing 1. The protruding blocks 13 can play a limiting role for the locking clip 3 in order to prevent it from detaching. It is a simple structure allowing for a firm lock.

[0027] Finally, it should be noted that the above embodiments serve only to describe the technical solutions of the present invention, instead of limiting it; Although a detailed description of the present invention has been given with reference to the embodiments referred to above, a person skilled in the art can understand that they may modify the technical solutions indicated in the embodiments referred to above or replace certain technical features in an equivalent manner; such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments within the framework of the present invention.

Claims

Demands

1. An airtight flush-mounting box, characterized in that it consists of a housing (1), said housing (1) consists of a base plate and side plates surrounding a side wall of the base plate, at the top of said housing (1) are provided long screws (2), said long screws (2) are each provided with a locking clip (3), on the side wall of said housing (1) is provided an oval hole (11) passing through an upper part, and on an outside side below the oval hole (11) of said housing (1) is provided an inclined part (12) which slopes from top to bottom, on two sides at the bottom of said inclined part (12) are provided two projecting blocks (13) opposed to each other, between each of the two sides of said inclined part (12) and an outside side wall of the housing (1) is provided a void space (14);Each long screw (2) consists of a nut (21) and a stud, said stud having a threaded portion (22) in the middle, between said threaded portion (22) and the nut (21) is an anti-loosening stop portion (24); at the end of the stud is provided an unthreaded portion (23); said locking clip (3) has a flattened structure, on said locking clip (3) is provided a mounting hole (31) matching one of the long screws (2), on an inner wall of said mounting hole (31) is provided an internal thread, and said locking clip (3) is provided with projections (33) extending outwards on both sides of one end, each projection (33) matching the empty space (14).

2. An airtight flush-mounting box according to claim 1, characterized in that said anti-detachment stop part (24) consists of a collar extending radially outwards and narrowing in a curved manner towards the threaded part (22).

3. An airtight recessed box according to claim 1, characterized in that at the top of said box (1) are provided two short screws (4), said short screws (4) are intended for fixing a switch or a power outlet on the box (1).

4. An airtight recessed box according to claim 1, characterized in that on said inclined part (12) is provided a slender groove (121) adapted to the long screw (2).

5. An airtight flush-mounting box according to claim 1, characterized in that said locking clip (3) is a flattened metal piece.

6.

7. An airtight recessed box according to claim 1, characterized in that said locking clip (3) is provided with several saw teeth (32) on another side opposite the projections (33). An airtight recessed box according to claim 1, characterized in that it has two long screws (2).

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