Airtight flush-mounted box

Abstract

An airtight flush-mounted box, characterized in that it consists of a housing (1), said housing (1) consists of a bottom plate and side plates surrounding the side walls of the bottom plate, at the top of said housing (1) are provided long screws (2), said long screw (2) is provided with a locking clip (3), on the side wall of said housing (1) is provided an oval hole (11) passing through the upper part, and on the outer side below the oval hole (11) of said housing (1) is provided an inclined part (12) which inclines from top to bottom, on both sides at the bottom of said inclined part (12) are provided two protruding blocks (13) opposite each other. (Figure for abstract: Fig.1)

Description

Title of the invention: Airtight flush-mounted box Technical field

[0001] The present invention relates to an airtight flush-mounted box. Prior art

[0002] The existing electrical accessory mounting box has a standard box structure which is called an airtight flush-mounted box in foreign countries, the airtight flush-mounted box is fixed in a hollow housing previously drilled on the wall, to then receive a switch or a socket. When setting up, a flush-mounted box is fixed to the wall through locking tabs, the end of the locking clip must be flattened or undergo another process to prevent the locking clip from detaching when pushed back, which increases the manufacturing cost. Content of the invention

[0003] The present invention provides an airtight flush-mounted box for preventing the locking clip from detaching.

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

[0005] An airtight flush-mounted box, characterized in that it consists of a housing, said housing consists of a bottom plate and side plates surrounding the side walls of the bottom plate, at the top of said housing are provided long screws, said long screw is provided with a locking clip, on the side wall of said housing is provided an oval hole passing through the upper part, and on the outer side under the oval hole of said housing is provided an inclined part which inclines from top to bottom, on both sides at the bottom of said inclined part are provided two protruding blocks opposite each other, between each of the two sides of said inclined part and the outer side wall of the housing is provided an empty space. Said long screw consists of a nut and a stud, said stud has a threaded part in the middle, between said threaded part and the nut is an anti-detachment stopper part.At the end of the stud there is an unthreaded part.

[0006] Said locking clip is in 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 outward on both sides of one end, said projections are matching the empty spaces.

[0007] Characterized in that said anti-detachment stopper portion consists of a collar extending radially outwardly and tapering in a curved manner towards the threaded portion.

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

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

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

[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 with the prior art, for the airtight flush-mounted box in the present invention, on the long screw is provided an anti-detachment stopper portion which can prevent the long screw from coming out of the oval hole, the long screw is provided with a locking clip and is matched with the inclined portion of the housing. When turning the long screw, the threaded portion of the long screw is in the same path as the threads of the mounting hole on the locking clip, to thereby be able to cause the locking clip to move upwards along the inclined portion, so that the saw teeth of the locking clip extend to the outside of the housing, the protruding blocks can play a limiting role for the locking clip to prevent it from coming off. It is a simple structure allowing firm locking. Brief description of the drawings

[0014] [Fig. 1] shows a three-dimensional view of the airtight flush-mounted box in accordance with the present invention.

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

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

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

[0018] As shown in Figures 1 to 3, the airtight flush-mounted box consists of a housing 1, the housing 1 consists of a bottom plate and side plates surrounding the side walls of the bottom 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 passing through the upper part, and on the outer side under the oval hole 11 of the housing 1 is provided an inclined part 12 which inclines from top to bottom, on the inclined part 12 is provided slender groove 121 adapted to the long screw 2, on the two sides at the bottom of the inclined part 12 are provided two protruding blocks 13 opposite 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 an empty space 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 there is an anti-detachment stop portion 24, the anti-detachment stop portion 24 consists of a collar extending radially outward and tapering 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-detachment stop portion 24 can pass through the oval hole 11 and the top of the anti-detachment stop portion 24 snaps into the bottom of the oval hole 11 since the bottom of the anti-detachment stop portion 24 is curved, to thereby prevent the long screw 2 from coming out of the oval hole 11. At the end of the stud there is provided a part non-threaded 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 outward 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] When mounting the airtight flush-mounted box, the locking clip 3 is first rotated so that the projections 33 are located on the upper and lower sides respectively, and the end of the locking clip 3 at which the projections 33 are provided rests against the bottom of the inclined portion 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 stopper portion 24 snaps into 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 flush-mounted box, the mounting hole 31 on the locking clip 3 being matched with the threads of the threaded portion 22 of the long screw 2, the long screw 2 allows, during screwing, to cause the movement of the locking clip 3 of the bottom to top of the inclined portion 12, so that the saw teeth 32 gradually extend outwards and thus hook onto the side wall in the housing on the wall, thereby achieving the fixing of the airtight flush-mounted 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-detachment stopper portion 24 of the long screw 2 will engage at the bottom of the oval hole 11 on the housing 1, to prevent the long screw 2 from coming out of the top of the oval hole 11. At the same time, once the locking clip 3 contacts the two protruding blocks 13, if the long screw 2 is further rotated, the non-threaded portion 23 at the end of the long screw 2 will enter the semi-detachment state with the mounting hole 31 on the locking clip 3.Since the long screw 2 is subjected to a counterclockwise rotation force when it is removed, the thread of the threaded portion 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 be matched with the thread of the locking clip 3 and will enter an idle rotation state, this state is to prevent the long screw 2 from being detached from the housing 1 under the rotation force of the thread. Upon installation, the nut 21 moves forward under the effect of the applied clockwise force, so that the thread of the threaded portion 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 cause 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 stopper part 24 of the long screw 2 will hook the flush-mounted 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 detachment of the locking clip 3.

[0026] For the airtight flush-mounted box in the present invention, on the long screw 2 there is provided an anti-detachment stopper portion 24 which can prevent the long screw 2 from coming out of the oval hole 11, the long screw 2 is provided with a locking clip 3 and is matched with 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, to thus be able 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 to the outside of the housing 1, the protruding blocks 13 can play a limiting role for the locking clip 3 to prevent it from coming off. It is a simple structure allowing a firm lock.

[0027] It is finally noted that the above embodiments only serve 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 he may modify the technical solutions indicated in the embodiments referred to above or replace certain technical features in an equivalent manner; these 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 scope of the present invention.

Claims

Claims

1. An airtight flush-mounted box, characterized in that it consists of a housing (1), said housing (1) consists of a bottom plate and side plates surrounding a side wall of the bottom 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 outer side below the oval hole (11) of said housing (1) is provided an inclined part (12) which inclines from top to bottom, on two sides at the bottom of said inclined part (12) are provided two protruding blocks (13) opposite each other, between each of the two sides of said inclined part (12) and an outer side wall of the housing (1) is provided an empty space (14);each long screw (2) consists of a nut (21) and a stud, said stud has a threaded portion (22) in the middle, between said threaded portion (22) and the nut (21) there is a detachment stopper portion (24); at the end of the stud there is provided a non-threaded portion (23); said locking clip (3) is in a flattened structure, on said locking clip (3) there is provided a mounting hole (31) matching one of the long screws (2), on an inner wall of said mounting hole (31) there is provided an internal thread, and said locking clip (3) is provided with projections (33) extending outward on both sides of one end, each projection (33) is matching the empty space (14).;

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

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

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

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

6.

7. An airtight flush-mounted 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 flush-mounted box according to claim 1, characterized in that it has two long screws (2).

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