Dust-proof intercom

Abstract

The present invention relates to the technical field of intercoms, and specifically to a dustproof intercom, comprising an intercom body, a hook, an antenna, a control area and an intercom button; the present invention optimizes the arrangement of a dust shield structure, which is located in front of a speaker mouth and a microphone mouth, and can effectively prevent dust, sand and other impurities from entering the microphone and the speaker, protect sensitive electronic components, and extend the service life of the equipment; the opening size of the dust shield structure is adjustable, and can reduce the invasion of dust impurities during sound propagation; and the support structure is optimized, which can be stored and folded and pressed into the rear part of the intercom body to reduce the area exposed to the outside, which is convenient for taking and using the intercom body, and when the intercom body needs to be placed, the support structure can be pulled out from the rear side of the intercom body and the bottom support can be placed at the placement position, and the position of the support can be flexibly changed to allow the intercom body to present different placement angles, which is convenient for users to fix it when using it on a desktop, and provides a better call experience.

Description

Technical Field

[0001] The invention relates to the technical field of intercoms, in particular to a dustproof intercom. Background Art

[0002] A walkie-talkie is a communication device that can use radio signals to transmit voice information, making it convenient for people to communicate and exchange in real time within a certain distance.

[0003] At present, China's patent application number: CN202322264506.0 discloses a walkie-talkie, including a machine body, a winding and unwinding mechanism, a fixed seat and a dust curtain, the machine body is provided with a functional part; the winding and unwinding mechanism and the fixed seat are both arranged on the machine body; one end of the dust curtain is arranged on the winding and unwinding mechanism, and the other end of the dust curtain is provided with a fixing part, the winding and unwinding mechanism is used to roll up or release the dust curtain, when the winding and unwinding mechanism releases the dust curtain, the fixing part is used to fix and cooperate with the fixed seat so that the dust curtain covers the functional part.

[0004] However, the intercoms in the prior art usually only use dust screens or dust curtains at the microphone and speaker positions to prevent dust from entering the interior, which makes it inconvenient to change the size of the dustproof area as needed. It is inconvenient to operate the intercom when the dust curtain blocks the intercom, and it affects the transmission and input of sound. In addition, when the intercom is used on a desktop, it is inconvenient to effectively support it so that the intercom is placed at the required position and angle, affecting the call experience. Summary of the invention

[0005] The object of the present invention is to provide a dustproof intercom to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dustproof intercom, including an intercom body, a hook, an antenna, a control area, an intercom button, a dustproof structure and a supporting structure, wherein a hook is fastened to the top of the rear side of the intercom body, and an antenna is arranged on the right side of the top of the intercom body, a control area is arranged on the lower side of the front of the intercom body, and a trumpet and a microphone are arranged on the upper side of the front of the intercom, an intercom button is installed on the upper middle part of the left side of the intercom body, a dustproof structure is embedded in the top side of the front of the intercom body, and the dustproof structure is located in front of the trumpet and the microphone, and the intercom A supporting structure is embedded in the middle and lower side of the rear part of the body, and the dust-blocking structure includes a frame seat embedded in the upper side of the front part of the intercom body, an adjustment component installed on the bottom side of the frame seat, a first pulley group and a second pulley group respectively connected to the left and right sides of the front part of the adjustment component, a shift bar installed on the inner side of the first pulley group and the second pulley group, a lower support piece fixed to the top side of the shift bar, a folding piece rotatably connected to the top side of the lower support piece, and an upper support piece rotatably connected to the top side of the folding piece, the first pulley group and the second pulley group are respectively rotatably connected to the left and right sides of the frame seat, and the top side of the upper support piece is fixed to the frame seat.

[0007] Preferably, a rectangular groove is opened on the middle side of the front part of the frame seat, and the interior is hollowed out, the folding piece is a five-section folding structure, and the folding piece is located on the inner side of the rectangular groove, and the folding connection of the folding piece is inserted into the hollow part of the frame seat.

[0008] Preferably, the first pulley group and the second pulley group have the same structure and size, and are both composed of two pulleys and a belt. The middle front parts of the two pulleys are rotatably connected to the frame seat, and the left and right sides of the shift strip are respectively fastened to the belts of the first pulley group and the second pulley group on the right side.

[0009] Preferably, the positioning assembly includes a push block arranged on the lower middle side of the frame seat, a conveyor belt is fastened to the bottom side of the push block, the left and right sides of the conveyor belt are rotatably connected to the first pulley and the second pulley respectively, the middle sides of the rear parts of the first pulley and the second pulley are rotatably connected to the frame seat, the middle side of the front part of the first pulley rotates coaxially with the pulley at the bottom of the first pulley group, and the middle side of the front part of the second pulley rotates coaxially with the pulley at the bottom of the second pulley group.

[0010] Preferably, a groove is provided on the right side of the front portion of the shift bar, and the belt at the left side of the second pulley set is arranged to penetrate the inner side of the groove.

[0011] Preferably, the supporting structure includes a cover arranged on the bottom side of the rear portion of the intercom body, a slider rotatably connected to the side of the cover, a slot frame wrapped and slid on the slider away from the cover, a first positioning column fixedly connected to the bottom side of the inside of the slot frame, a rotating plate rotatably connected to the first positioning column away from the side of the slot frame, a handle fastened to the bottom of the front side of the cover, and a support assembly arranged on the bottom side of the inside of the cover, the slot frame is embedded in the bottom side of the rear portion of the intercom body, the top side of the rotating plate is rotatably connected to the cover, and the front side surface of the cover is flush with the lower side surface of the rear portion of the intercom body.

[0012] Preferably, the sliding block, the slot frame, the first positioning column and the rotating piece are each provided with two groups, and the two groups are located in the middle of the cover and are arranged in a left-right symmetrical shape.

[0013] Preferably, the support and expansion assembly includes a supporting plate slidably connected to the front side of the inner part of the cover, a first support rod rotatably arranged on the upper middle side of the rear part of the supporting plate, a compression spring wrapped around the outer surface of the rear part of the first support rod, a second support rod fastened to the rear end of the compression spring, a connecting rod piece rotatably connected to the rear side of the second support rod, a push rod rotatably connected to the bottom of the connecting rod piece, a support frame rotatably arranged at the bottom end of the push rod, and a second positioning column that passes through and rotates on the right side of the bottom of the support frame, the top side of the connecting rod piece is rotatably connected to the supporting plate, and the right side of the second positioning column is fixed to the supporting plate.

[0014] Preferably, the upper and lower sides of the rear part of the supporting plate are fixedly connected with convex strips, and the rear side of the upper convex strip is in sliding contact with the rear side of the inner part of the cover, the top side of the connecting rod plate is rotatably connected to the upper convex strip, and the right side of the second positioning column is fixed to the lower convex strip.

[0015] Preferably, a first limit block and a second limit block are respectively provided on the upper side and the lower side of the middle part of the bearing plate, and the right sides of the first limit block and the second limit block are fixed to the cover, and the support frame is in an L-shaped structure.

[0016] Preferably, a silicone strip is provided on the rear side of the long arm end of the support frame, and a strip groove is provided on the bottom side of the rear portion of the support plate to facilitate pulling it.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention optimizes the setting of a dust blocking structure, which is located in front of the speaker mouth and the microphone mouth, and can effectively prevent dust, sand and other impurities from entering the microphone and the speaker, protect sensitive electronic components, and extend the service life of the equipment. The opening size of the dust blocking structure is adjustable, which can reduce the invasion of dust impurities when sound is transmitted; and the supporting structure is optimized. The supporting structure can be stored and folded and pressed into the rear part of the intercom body to reduce the area exposed to the outside, which is convenient for taking and using the intercom body. When the intercom body needs to be placed, the supporting structure can be pulled out from the rear side of the intercom body and the bottom support can be placed at the placement position. The position of the support can be flexibly changed to allow the intercom body to present different placement angles, which is convenient for users to fix it when using it on the desktop, providing a better calling experience.

[0019] The first pulley group and the second pulley group of the present invention have the same structure and size, and are both composed of two pulleys and a belt. The left and right sides of the shift bar are respectively fastened to the belts of the first pulley group and the second pulley group on the right side, so that the position of the shift bar can be changed by rotating the belts on the pulleys. A groove is provided on the right side of the front part of the shift bar, and the belt on the left side of the second pulley group is penetrated and arranged inside the groove, thereby ensuring the stable movement of the shift bar and not limiting the movement of the shift bar.

[0020] The upper and lower sides of the rear part of the load-bearing plate of the present invention are fixedly connected with convex strips, and the rear side of the convex strip located at the upper part is in sliding contact with the rear side of the inner part of the cover, thereby ensuring the stability of the load-bearing plate while providing a fulcrum. The top side of the connecting rod piece is rotatably connected with the convex strip located at the upper part, so that the connecting rod piece rotates with the convex strip as the fulcrum, and the right side of the second positioning column is fixed with the convex strip located at the lower part, thereby ensuring the stability of the support frame rotating with the second positioning column as the fulcrum. The first limit block and the second limit block are respectively provided on the upper and lower sides of the middle part of the load-bearing plate, which limit the up and down movement range of the load-bearing plate, facilitate the load-bearing plate to be pulled out from the inside of the cover, and prevent the load-bearing plate from falling off from the inside of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the dust shielding structure of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the position adjustment component of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified view of the local structure at point A in the middle;

[0026] Figure 6 It is a structural schematic diagram of the support structure of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the connection between the slot frame and the rotating piece of the present invention;

[0028] Figure 8 It is a side view structural diagram of the connection between the cover and the support assembly of the present invention;

[0029] Fig. 9 It is a schematic side view of the structure of the support assembly of the present invention.

[0030] In the figure: intercom body-1, hook-2, antenna-3, control area-4, intercom button-5, dust shield structure-6, support structure-7, frame seat-61, adjustment component-62, first pulley group-63, second pulley group-64, shifting strip-65, lower support piece-66, folding piece-67, upper support piece-68, push block-621, conveyor belt-622, first pulley-623, second pulley-62 4. Groove 651, cover 71, slider 72, slot frame 73, first positioning column 74, rotating plate 75, handle 76, support assembly 77, bearing plate 771, first support rod 772, compression spring 773, second support rod 774, connecting rod sheet 775, push rod 776, support frame 777, second positioning column 778, first limit block 711, second limit block 712. DETAILED DESCRIPTION

[0031] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0032] See also Figure 1 and Figure 2The present invention provides a dustproof intercom, including an intercom body 1, a hook 2, an antenna 3, a control area 4, an intercom button 5, a dustproof structure 6 and a supporting structure 7. The hook 2 is fastened to the top of the rear side of the intercom body 1, which is convenient for users to hang it on their bodies for use. The antenna 3 is arranged on the right side of the top of the intercom body 1 to improve the signal of the intercom body 1. The control area 4 is arranged on the lower side of the front of the intercom body 1, and the speaker and microphone are arranged on the upper side of the front of the intercom 1. The intercom button 5 is installed on the upper middle part of the left side of the intercom body 1. The dustproof structure 6 is embedded on the top side of the front of the intercom body 1, and the dustproof structure 6 is located in front of the speaker and the microphone, which can effectively prevent dust, sand and other Impurities enter the microphone and speaker, protecting sensitive electronic components and extending the service life of the equipment. The opening size of the dust shield structure 6 is adjustable, which can reduce the invasion of dust impurities when sound is transmitted. A support structure 7 is embedded in the lower middle side of the rear part of the intercom body 1. The support structure 7 can be stored and folded and pressed into the rear part of the intercom body 1 to reduce the area exposed to the outside, which is convenient for taking and using the intercom body 1. When the intercom body 1 needs to be placed, the support structure 7 can be pulled out from the rear side of the intercom body 1 and the bottom support can be placed at the placement position. The position of the support can be flexibly changed to allow the intercom body 1 to be placed at different angles, which is convenient for users to fix it when using it on the desktop, providing a better calling experience.

[0033] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The present invention provides a dustproof intercom, wherein the dustproof structure 6 comprises a frame seat 61 embedded in the upper front side of the intercom body 1, a positioning assembly 62 installed on the bottom side of the frame seat 61, a first belt pulley group 63 and a second belt pulley group 64 respectively connected to the left and right sides of the front of the positioning assembly 62, and a shifting bar 65 installed on the inner side of the first belt pulley group 63 and the second belt pulley group 64. The first belt pulley group 63 and the second belt pulley group 64 drive the shifting bar 65 to change its height position through the positioning assembly 62, and a lower support piece fixed to the top side of the shifting bar 65 66. The folding piece 67 rotatably connected to the top side of the lower support piece 66 and the upper support piece 68 rotatably connected to the top side of the folding piece 67, after the shift bar 65 is changed in height longitudinally, the folding piece 67 is driven by the lower support piece 66 to fold or unfold under the upper support piece 68, so that the speaker mouth and the microphone mouth are exposed or covered in the space inside the frame seat 61, the first pulley group 63 and the second pulley group 64 are rotatably connected to the left and right sides of the frame seat 61 respectively, and the top side of the upper support piece 68 is fixed to the frame seat 61 to ensure the stability of the movement of the folding piece 67.

[0034] Among them, a rectangular groove is opened in the middle side of the front part of the frame seat 61, and the interior is hollow. The folding piece 67 has a five-section folding structure, and the folding piece 67 is located on the inner side of the rectangular groove, and the folding connection of the folding piece 67 is inserted into the hollow part of the frame seat 61, so as to effectively limit the folding piece 67 and ensure that the folding piece 67 can be stably folded or unfolded. The first pulley group 63 and the second pulley group 64 have the same structure and size, and both are composed of two pulleys and a belt. The middle part of the front side of the two pulleys is rotatably connected to the frame seat 61, and the left and right sides of the shift bar 65 are respectively fastened to the belts of the first pulley group 63 and the second pulley group 64 on the right side, so that the position of the shift bar 65 can be changed by the rotation of the belt on the pulley. A groove 651 is opened on the right side of the front part of the shift bar 65, and the belt at the left side of the second pulley group 64 is penetrated and arranged inside the groove 651, so as to ensure the stable movement of the shift bar 65 and not limit the movement of the shift bar 65.

[0035] Among them, the adjustment component 62 includes a push block 621 arranged on the middle and lower side of the frame seat 61, and a conveying belt 622 is fastened to the bottom side of the push block 621. The left and right sides of the conveying belt 622 are rotatably connected with the first pulley 623 and the second pulley 624 respectively, and the middle sides of the rear parts of the first pulley 623 and the second pulley 624 are rotatably connected with the frame seat 61. When the push block 621 is pushed laterally, the conveying belt 622 drives the first pulley 623 and the second pulley 624 to rotate, and the middle side of the front part of the first pulley 623 rotates coaxially with the pulley at the bottom of the first pulley group 63, and the middle side of the front part of the second pulley 624 rotates coaxially with the pulley at the bottom of the second pulley group 64, so that the first pulley group 63 and the second pulley group 64 can move synchronously under the action of the two pulleys, thereby driving the height position movement and adjustment of the shift bar 65.

[0036] See also Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The present invention provides a dustproof intercom, wherein the support structure 7 comprises a cover 71 arranged at the bottom side of the rear part of the intercom body 1, a slider 72 rotatably connected to the side of the cover 71, a slot frame 73 wrapped and slid on the slider 72 away from the side of the cover 71, a first positioning column 74 fixedly connected to the bottom side of the inside of the slot frame 73, a rotating piece 75 rotatably connected to the side of the first positioning column 74 away from the slot frame 73, a handle 76 fastened to the bottom of the front side of the cover 71, and a support assembly 77 arranged at the bottom side of the inside of the cover 71. The top side of the rotating piece 75 is rotatably connected to the cover 71, and the cover 71 can be moved by pulling the handle 76. 1 is pulled forward under the support of the rotating piece 75. When the cover 71 is pulled forward, the slider 72 moves inside the slot frame 73. The slot frame 73 is embedded in the bottom side of the rear part of the intercom body 1. The front side of the cover 71 is flush with the lower side of the rear part of the intercom body 1. The slider 72, the slot frame 73, the first positioning column 74 and the rotating piece 75 are each provided with two groups, and the two groups are located in the middle of the cover 71 and are arranged in a left-right symmetrical shape to provide a stable supporting force to ensure the stability of the cover 71 during the movement process. After the support assembly 77 is pulled out from the inside of the cover 71, the bottom position is unfolded to support the desktop with stable contact.

[0037] The support assembly 77 includes a supporting plate 771 slidably connected to the front side of the inner part of the cover 71, a first support rod 772 rotatably arranged on the middle and upper side of the rear part of the supporting plate 771, a compression spring 773 wrapped around the outer surface of the rear part of the first support rod 772, and a second support rod 774 fastened to the rear end of the compression spring 773. The compression spring 773 applies an elastic force to the second support rod 774 away from the first support rod 772, a connecting rod piece 775 rotatably connected to the rear side of the second support rod 774, a push rod 776 rotatably connected to the bottom of the connecting rod piece 775, a support frame 777 rotatably arranged at the bottom end of the push rod 776, and a support frame 777 that runs through and rotates on the support frame The second positioning column 778 on the right side of the bottom 777 and the top side of the connecting rod piece 775 are rotatably connected to the supporting plate 771, and the right side of the second positioning column 778 is fixed to the supporting plate 771. When the supporting plate 771 is pulled downward from the inside of the cover 71 so that the connecting rod piece 775 does not contact the inner wall of the cover 71, the compression spring 773 drives the second support rod 774 to be pushed out to the rear side to rotate the connecting rod piece 775 on the supporting plate 771, and the connecting rod piece 775 pulls the push rod 776 to make the support frame 777 rotate with the second positioning column 778 as the fulcrum, so that the support frame 777 is supported on the desktop, thereby improving the stability of the overall intercom body 1.

[0038] The upper and lower sides of the rear of the supporting plate 771 are fixedly connected with convex strips, and the rear side of the convex strip located at the upper part is in sliding contact with the rear side of the inner part of the cover 71, which ensures the stability of the supporting plate 771 while providing a fulcrum. The bottom side of the rear of the supporting plate 771 is provided with a strip groove that is convenient for pulling it, so that the supporting plate 771 can be pulled out from the inside of the cover 71. The top side of the connecting rod piece 775 is rotatably connected to the convex strip located at the upper part, so that the connecting rod piece 775 can rotate with the convex strip as the fulcrum. The right side of the second positioning column 778 is fixed to the convex strip located at the lower part, ensuring that the support frame 777 uses the second positioning column 778 as the fulcrum In order to ensure the stability of the rotation, a first limit block 711 and a second limit block 712 are respectively provided on the upper and lower sides of the middle part of the supporting plate 771, and the right sides of the first limit block 711 and the second limit block 712 are fixed to the cover 71, so as to limit the up and down movement range of the supporting plate 771, facilitate the supporting plate 771 to be pulled out from the inside of the cover 71, and prevent the supporting plate 771 from falling off from the inside of the cover 71, and the support frame 777 is L-shaped, and a silicone strip is provided on the rear side of the long arm end of the support frame 777, so as to increase the friction between the supporting plate and the desktop when in contact with the desktop, thereby further increasing the stability effect when placed.

[0039] The present invention provides a dustproof intercom, and the working principle is as follows:

[0040] First, during the use of the intercom body 1, the push block 621 can be pushed to the left, and the push block 621 can be pushed to make the conveying belt 622 drive the first pulley 623 and the second pulley 624 to rotate counterclockwise, so that under the action of the first pulley 623 and the second pulley 624, the first pulley group 63 and the second pulley group 64 can move synchronously, thereby driving the shift bar 65 to move upward to a height position, and after the shift bar 65 moves upward, the folding sheet 67 is driven by the lower support sheet 66 to fold under the upper support sheet 68, so that the horn and the microphone port are exposed in the space inside the frame seat 61, and the horn and the microphone port are completely exposed when the shift bar 65 moves to the top side, on the contrary, the push block 621 is pushed to the right to make the shift bar 65 move downward to drive the folding sheet 67 to unfold, so that the horn and the microphone port are blocked behind the folding sheet 67, reducing the intrusion of dust and impurities into the horn and the microphone port;

[0041] Second, when the intercom body 1 needs to be placed on a desktop for use, the handle 76 can be pulled backward so that the cover 71 can drive the slider 72 to move downward inside the slot frame 73 under the support of the rotating piece 75, so that an angle is formed between the cover 71 and the intercom body 1, and then the bearing plate 771 is pulled downward from the inside of the cover 71. When the bearing plate 771 is pulled until the connecting rod piece 775 does not contact the inner wall of the cover 71, the compression spring 773 drives the second support rod 774 to push out to the rear side to make the connecting rod piece 775 rotate on the bearing plate 771. The connecting rod piece 775 pulls the push rod 776 to make the support frame 777 rotate with the second positioning column 778 as the fulcrum, and then the support frame 777 rotates until it contacts and supports on the desktop, so that the intercom body 1 can be stably placed and used;

[0042] Third, when the cover 71 needs to be reset, lift the support frame 777 so that the push rod 776 pulls the connecting rod piece 775 downward, and under the action of the connecting rod piece 775, the second support rod 774 approaches the first support rod 772 to compress the compression spring 773, and then push the supporting plate 771 upward to move it into the cover 71, and then use the handle 76 to press the cover 71 between the two slot frames 73 so that the back side of the cover 71 is flush with the back side of the intercom body 1.

[0043] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dustproof intercom, comprising an intercom body (1), a hook (2) being fastened to the top of the rear side of the intercom body (1), an antenna (3) being arranged on the right side of the top of the intercom body (1), a control area (4) being arranged on the lower side of the front of the intercom body (1), a speaker and a microphone opening being arranged on the upper side of the front of the intercom body (1), an intercom button (5) being installed on the upper middle part of the left side of the intercom body (1), characterized in that: The invention also comprises a dust shield structure (6) embedded in the top side of the front part of the intercom body (1) and a support structure (7) embedded in the middle and lower side of the rear part of the intercom body (1), wherein the dust shield structure (6) is located in front of the speaker and the microphone, and comprises a frame seat (61) embedded in the upper side of the front part of the intercom body (1), a positioning assembly (62) installed on the bottom side of the frame seat (61), a first belt pulley group (63) and a second belt pulley group (64) respectively connected to the left and right sides of the front part of the positioning assembly (62), a shifting strip (65) installed on the inner side of the first belt pulley group (63) and the second belt pulley group (64), a lower support plate (66) fixed to the top side of the shifting strip (65), and a support plate (66) rotatably connected to the lower support plate. The folding sheet (67) on the top side of the folding sheet (66) and the upper support sheet (68) rotatably connected to the top side of the folding sheet (67), the first pulley group (63) and the second pulley group (64) are rotatably connected to the left and right sides of the frame seat (61), and the top side of the upper support sheet (68) is fixed to the frame seat (61); the first pulley group (63) and the second pulley group (64) have the same structure and size, and are both composed of two pulleys and a belt, the middle parts of the front sides of the two pulleys are rotatably connected to the frame seat (61), and the left and right sides of the shifting strip (65) are respectively fastened to the belts of the first pulley group (63) and the second pulley group (64) located on the right side; the positioning assembly (62 ) comprises a push block (621) arranged at the middle and lower side of the frame seat (61), a conveying belt (622) being fastened to the bottom side of the push block (621), the left and right sides of the conveying belt (622) being rotatably connected to the first pulley (623) and the second pulley (624) respectively, the middle sides of the rear parts of the first pulley (623) and the second pulley (624) being rotatably connected to the frame seat (61), the middle side of the front part of the first pulley (623) being coaxially rotated with the pulley at the bottom of the first pulley group (63), and the middle side of the front part of the second pulley (624) being coaxially rotated with the pulley at the bottom of the second pulley group (64); the support structure (7) comprises a A cover (71), a slider (72) rotatably connected to the side of the cover (71), a slot frame (73) wrapped and slidably connected to the slider (72) on a side away from the cover (71), a first positioning column (74) fixedly connected to the bottom side of the inside of the slot frame (73), a rotating piece (75) rotatably connected to the side of the first positioning column (74) away from the slot frame (73), a handle (76) fastened to the bottom of the front side of the cover (71), and a support assembly (77) arranged on the bottom side of the inside of the cover (71), wherein the slot frame (73) is embedded in the bottom side of the rear part of the intercom body (1), the top side of the rotating piece (75) is rotatably connected to the cover (71), and the front side surface of the cover (71) is flush with the lower side surface of the rear part of the intercom body (1).

2. A dustproof intercom according to claim 1, characterized in that: A rectangular groove is provided in the middle of the front portion of the frame seat (61), and the interior is hollowed out; the folding sheet (67) is a five-section folding structure, and the folding sheet (67) is located inside the rectangular groove, and the folded connection portion of the folding sheet (67) is inserted into the hollow portion of the frame seat (61).

3. The dustproof intercom according to claim 1, characterized in that: A groove (651) is provided on the right side of the front portion of the shifting bar (65), and a belt on the left side of the second belt pulley set (64) is arranged to penetrate the inner side of the groove (651).

4. The dustproof intercom according to claim 1, characterized in that: The sliding block (72), the slot frame (73), the first positioning column (74) and the rotating plate (75) are each provided in two groups, and the two groups are located in the middle of the cover (71) and are arranged in a left-right symmetrical manner.

5. The dustproof intercom according to claim 1, characterized in that: The support and expansion assembly (77) includes a bearing plate (771) slidably connected to the front side of the inner part of the cover (71), a first support rod (772) rotatably arranged on the upper middle side of the rear part of the bearing plate (771), a compression spring (773) wrapped around the outer surface of the rear part of the first support rod (772), a second support rod (774) fastened to the rear end of the compression spring (773), a connecting rod piece (775) rotatably connected to the rear side of the second support rod (774), a push rod (776) rotatably connected to the bottom of the connecting rod piece (775), a support frame (777) rotatably arranged at the bottom end of the push rod (776), and a second positioning column (778) penetrating the right side of the bottom of the rotating support frame (777), wherein the top side of the connecting rod piece (775) is rotatably connected to the bearing plate (771), and the right side of the second positioning column (778) is fixed to the bearing plate (771).

6. The dustproof intercom according to claim 5, characterized in that: The upper and lower sides of the rear of the carrier plate (771) are fixedly connected with convex strips, and the rear side of the convex strip located at the upper part is in sliding contact with the rear side of the inner part of the cover (71), the top side of the connecting rod sheet (775) is rotatably connected to the convex strip located at the upper part, and the right side of the second positioning column (778) is fixed to the convex strip located at the lower part.

7. The dustproof intercom according to claim 5, characterized in that: A first limit block (711) and a second limit block (712) are respectively arranged on the upper and lower sides of the middle part of the bearing plate (771), and the right sides of the first limit block (711) and the second limit block (712) are fixed to the cover (71), and the support frame (777) is an L-shaped structure.

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