Air-proof concealed box

Abstract

Provided is an air-proof concealed box, comprising a box body (1), wherein the box body (1) is composed of a bottom plate and a side plate surrounding a side wall of the bottom plate, a long screw (2) is mounted at the top of the box body (1), and a lock catch (3) is sleeved on the long screw (2). In the air-proof concealed box, an anti-falling limiting portion (24) is arranged on the long screw (2), such that the long screw (2) can be prevented from being pulled out from an elliptical hole (11) by means of the anti-falling limiting portion (24); the lock catch (3) is sleeved on the long screw (2), the long screw (2) matches an inclined portion (12) on the box body (1), and a threaded portion (22) of the long screw (2) is in the same direction as a thread of a mounting hole (31) of the lock catch (3) when the long screw (2) is screwed, such that the lock catch (3) can be driven to move upwards along the inclined portion (12), and thus serration of the lock catch (3) protrude from an outer side of the box body (1); and protrusions (13) can limit the lock catch (3) so as to prevent the lock catch (3) from falling off. The structure is simple, and locking is firm.

Description

Airproof box Technical Field

[0001] The invention relates to an airproof dark box. Background Art

[0002] Existing electrical accessory mounting boxes are standard box structures, known internationally as "gas-proof boxes." These boxes are fixed to a pre-cut groove in the wall, and the switch or socket is then mounted on top of the boxes. During installation, the gas-proof boxes are secured to the wall using a latch. The end of the latch requires flattening or other secondary processing to prevent it from falling off when the latch is retracted, increasing production costs.

[0003] Summary of the Invention

[0004] The invention provides an air-proof dark box capable of preventing a lock buckle from falling off.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] The airproof dark box includes a box body, which is composed of a bottom plate and side plates arranged around the side walls of the bottom plate. A long screw is installed on the top of the box body, and a lock buckle is sleeved on the long screw. The side wall of the box body is provided with an elliptical hole penetrating the top. The box body is provided with an inclined portion on the outside below the elliptical hole, and the inclined portion is inclined from top to bottom. Bumps are relatively provided on both sides of the lower side of the inclined portion. A gap is provided between the two sides of the inclined portion and the outer wall of the box body. The long screw includes a nut and a screw rod. The screw includes a threaded portion located in the middle, an anti-slip limit portion is provided between the threaded portion and the nut, and a toothless portion is provided at the end of the screw rod.

[0007] The lock buckle is a flat structure, and is provided with a mounting hole that cooperates with a long screw. The inner wall of the mounting hole is provided with an internal thread. Both sides of one end of the lock buckle are provided with protrusions extending outward, and the protrusions cooperate with the gap.

[0008] Preferably, the anti-slip limit portion is a clamping ring that extends radially outward and is arc-shapedly connected toward the thread portion.

[0009] Preferably, two short screws are provided on the top of the box body, and the short screws are used to fix the switch socket on the box body.

[0010] Preferably, the inclined portion is provided with a strip groove adapted to fit the long screw.

[0011] Preferably, the lock buckle is a flat metal piece.

[0012] Preferably, the other end of the lock buckle opposite to the protrusion is provided with a plurality of saw-like teeth.

[0013] Preferably, there are two long screws.

[0014] Compared with the prior art, the airtight box of the present invention provides an anti-slip limit part on the long screw, which can prevent the long screw from being pulled out of the elliptical hole. A lock buckle is provided on the long screw, and the long screw is adapted to the inclined part on the box body. When the long screw is rotated, the thread of the long screw is consistent with the thread direction of the mounting hole of the lock buckle, thereby driving the lock buckle to move upward along the inclined part so that the serrated teeth of the lock buckle extend to the outside of the box body. The protrusion can limit the lock buckle to prevent it from falling off. The structure is simple and the locking is firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a perspective schematic diagram of the airproof dark box of the present invention.

[0016] FIG2 is a perspective schematic diagram of the airproof dark box of the present invention.

[0017] FIG3 is a partial exploded schematic diagram of the airproof dark box of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0019] As shown in Figures 1 to 3, the airproof box includes a box body 1, which is composed of a bottom plate and side plates arranged around the side walls of the bottom plate. Two long screws 2 and two short screws 4 are installed on the top of the box body 1. The two long screws 2 and the two short screws 4 are symmetrically arranged. The short screws 4 are used to fix the switch socket on the box body 1.

[0020] A lock buckle 3 is sleeved on the long screw 2, and an elliptical hole 11 is provided on the side wall of the box body 1, which passes through the top. An inclined portion 12 is provided on the outer side of the box body 1 below the elliptical hole 11. The inclined portion 12 is inclined from top to bottom, and a strip groove 121 adapted to the long screw 2 is provided on the inclined portion 12. Bumps 13 are provided on both sides of the lower side of the inclined portion 12, and a gap 14 is provided between the two sides of the inclined portion 12 and the outer wall of the box body 1.

[0021] The long screw 2 includes a nut 21 and a screw rod. The screw rod includes a thread portion 22 located in the middle. An anti-slip limit portion 24 is provided between the thread portion 22 and the nut 21. The anti-slip limit portion 24 is a clamping ring extending radially outward and connected in an arc shape toward the thread portion 22. Therefore, after the long screw 2 is screwed into the elliptical hole 11, the bottom of the anti-slip limit portion 24 is arc-shaped, so that the anti-slip limit portion 24 can pass through the elliptical hole 11 and the top of the anti-slip limit portion 11 is stuck to the bottom of the elliptical hole 11, preventing the long screw 2 from being pulled out of the elliptical hole 11. A toothless portion 23 is provided at the end of the screw rod.

[0022] The lock buckle 3 is a flat metal part. A mounting hole 31 is provided on the lock buckle 3 to cooperate with the long screw 2. The inner wall of the mounting hole 31 is provided with an internal thread. One end of the lock buckle 3 is provided with multiple serrated teeth 32, and the other end is provided with protrusions 33 extending outward on both sides. The protrusions 33 cooperate with the gap 14, so that the lock buckle 3 can move up and down along the gap 14.

[0023] When assembling the air-proof cassette, first rotate the lock buckle 3 so that the protrusions 33 are located on the upper and lower sides respectively, so that the end of the lock buckle 3 with the protrusions 33 abuts the bottom of the inclined portion 12, and then rotate 90° so that the protrusions 33 of the lock buckle 3 are inserted into the gap 14, screw the long screw 2 into the elliptical hole 11 and cooperate with the mounting hole 31 of the lock buckle 3, and the anti-slip limit portion 24 is engaged with the bottom of the elliptical hole 11.

[0024] When installing the airtight cassette, when the nut 21 of the long screw 2 is rotated with an electric screwdriver, since the mounting hole 31 of the lock buckle 3 is threadedly engaged with the threaded portion 22 of the long screw 2, the long screw 2 can drive the lock buckle 3 to move upward from the bottom of the inclined portion 12 when rotating, so that the serrated teeth 32 gradually extend outward to hook the side wall of the wall, thereby fixing the airtight cassette.

[0025] Since the end of the long screw 2 is provided with a toothless portion 23, once the lock buckle 3 moves to the connection between the threaded portion 22 and the toothless portion 23, the anti-slip limit portion 24 of the long screw 2 engages with the bottom of the elliptical hole 11 of the box body 1 to prevent the long screw 2 from being pulled out from the upper part of the elliptical hole 11. At the same time, after the lock buckle 3 contacts the two protrusions 13, the long screw 2 continues to be rotated, and the toothless portion 23 at the end of the long screw 2 will enter a semi-stripped state with the mounting hole 31 of the lock buckle 3. Since the long screw 2 is subjected to a counterclockwise rotation force when the screw is withdrawn, the threaded portion 22 of the long screw 2 and the mounting hole 31 of the lock buckle 3 will be inconsistent in the threaded matching direction. The long screw 2 cannot be threaded with the lock buckle 3 and forms an idling state. In this state, the long screw 2 will not fall off from the box body 1 due to the thread rotation force. When installation is required, the nut 21 moves forward clockwise under the force, so that the threaded portion 22 of the long screw 2 is consistent with the thread direction of the mounting hole 31 of the lock buckle 3, and the two are reconnected, thereby driving the lock buckle 3 to move toward the top of the box body 1.

[0026] The lock buckle 3 will not fall off the long screw 2. The anti-fall-off limiting portion 24 of the long screw 2 will hook the hidden box and two protrusions 13 are provided at the bottom of the inclined portion 12. The protrusions 13 can further limit the lock buckle 3 and prevent the lock buckle 3 from falling off.

[0027] The airtight cassette of the present invention is provided with an anti-slip limit portion 24 on the long screw 2, and the anti-slip limit portion 24 can prevent the long screw 2 from being pulled out of the elliptical hole 11. A lock buckle 3 is sleeved on the long screw 2, and the long screw 2 is adapted to the inclined portion 12 on the box body 1. When the long screw 2 is rotated, the threaded portion 22 of the long screw 2 is consistent with the thread direction of the mounting hole 31 of the lock buckle 3, thereby driving the lock buckle 3 to move upward along the inclined portion 12 so that the serrated teeth 32 of the lock buckle 3 extend to the outside of the box body 1, and the protrusion 13 can limit the lock buckle 3 to prevent the lock buckle 3 from falling off. The structure is simple and the locking is firm.

[0028] Finally, it should be noted that the above embodiments only illustrate the technical solutions of the present invention and do not limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Anti-gas concealed box, Characterized in that, It includes a box body (1), the box body (1) is composed of a bottom plate and side plates surrounding the side wall of the bottom plate, a long screw (2) is installed on the top of the box body (1), a lock catch (3) is sleeved on the long screw (2), an elliptical hole (11) penetrating the top is provided on the side wall of the box body (1), an inclined part (12) is arranged outside the box body (1) below the elliptical hole (11), the inclined part (12) slopes downward from top to bottom, convex blocks (13) are oppositely arranged on both sides below the inclined part (12), a gap (14) is arranged between both sides of the inclined part (12) and the outer side wall of the box body (1), the long screw (2) includes a nut (21) and a screw rod, the screw rod includes a thread part (22) in the middle, an anti-loosening limit part (24) is arranged between the thread part (22) and the nut (21), and a non-threaded part (23) is arranged at the end of the screw rod; The lock catch (3) is of a flat structure, an installation hole (31) matching with the long screw (2) is arranged on the lock catch (3), internal threads are arranged on the inner wall of the installation hole (31), protrusions (33) extending outward are arranged on both sides at one end of the lock catch (3), and the protrusions (33) are matched with the gap (14).

2. The anti-gas concealed box according to claim 1, Characterized in that, The anti-loosening limit part (24) is a snap ring extending radially outward and arc-connected towards the thread part (22).

3. The anti-gas concealed box according to claim 1, Characterized in that, Two short screws (4) are arranged on the top of the box body (1), and the short screws (4) are used to fix the switch socket on the box body (1).

4. The anti-gas concealed box according to claim 1, Characterized in that, A strip-shaped groove (121) matching with the long screw (2) is arranged on the inclined part (12).

5. The anti-gas concealed box according to claim 1, Characterized in that, The lock catch (3) is a flat metal part.

6. The anti-gas concealed box according to claim 1, Characterized in that, Multiple saw-shaped teeth (32) are arranged at the other end of the lock catch (3) opposite to the protrusion (33).

7. The anti-gas concealed box according to claim 1, Characterized in that, There are two long screws (2).

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