阅读说明：本技术 一种具有防尘防护结构的警用对讲机 (Police interphone with dustproof protection structure ) 是由 赖沛浈 韦优媚 王利钧 张娟 崔艺帆 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种具有防尘防护结构的警用对讲机,涉及对讲机防尘技术领域,解决了现有的对讲机收音槽和滤网较小,内部灰尘容易堆积,外部通过抹布擦除不容易清洁,除尘不彻底的问题。一种具有防尘防护结构的警用对讲机,包括对讲机本体；所述对讲机本体的背侧通过螺丝拧接固定有防尘安装壳。对讲机本体在使用时,能够通过背嵌式的内除尘组件通过除尘泵气道从对讲机本体的内部向收放音部位进行吹气除尘操作,气体能够从内部作用于被堆积在滤网和收音槽部位的灰尘,除尘彻底,方便高效,且两个气体压缩腔和两个活塞推片配合作用的交替压缩抽吸空气进行除尘,气体供给连续不断,除尘效果更好。(The invention discloses a police interphone with a dustproof protection structure, relates to the technical field of interphone dust prevention, and solves the problems that an existing interphone sound receiving groove and a filter screen are small, internal dust is easy to accumulate, the outside of the interphone is not easy to clean due to the fact that the interphone is erased by a cleaning cloth, and dust removal is not complete. A police interphone with a dustproof protection structure comprises an interphone body; the dorsal part of intercom body is screwed through the screw and is fixed with dustproof installation shell. The intercom body is when using, can blow through dust removal pump air flue from the inside of intercom body to receiving and releasing the sound position through the interior dust removal subassembly of back of the body formula of inlaying, and gas can be followed the inside and acted on and is piled up the dust at filter screen and radio reception slot part position, and it is thorough to remove dust, convenient high-efficient, and two gas compression chamber and two piston push jack mating action's alternative compression suction air remove dust, and gas supply is continuous, and dust removal effect is better.)

1. The utility model provides a police intercom with dustproof protective structure which characterized in that: comprises an interphone body (1);

the back side of the interphone body (1) is fixedly screwed with a dustproof mounting shell (2) through screws;

the dustproof mounting shell (2) comprises a mounting side shell (201) and a mounting main shell (202), the mounting side shell (201) is screwed and fixed on the side face of the shell of the mounting main shell (202) through screws, and the mounting main shell (202) is screwed and fixed in a mounting groove on the back side of the interphone body (1) through screws;

the dust removal device is characterized in that an inner dust removal component (3) is installed inside the main installation shell (202), and a dust removal linkage component (4) is installed on the side surface of the main installation shell (202).

2. A police interphone with dustproof protection structure as in claim 1, characterized by that: the inner dust removal component (3) comprises:

the piston push sheet (301), the piston push sheet (301) is inserted in the main mounting shell (202);

and two ends of the power rod (302) are respectively and rotatably connected inside the shell body of the main mounting shell (202).

3. A police interphone with dustproof protection structure as in claim 1, characterized by that: dust removal linkage subassembly (4) including:

the mounting fixing block (401), the mounting fixing block (401) is fixedly connected to the side face of the shell of the mounting main shell (202);

the top of the holding rod (402) is rotatably connected inside the mounting fixing block (401);

the linkage rod (403), the linkage rod (403) is inserted in the shell of the main mounting shell (202).

4. A police interphone with dustproof protection structure as in claim 1, characterized by that: the installation side shell (201) is composed of a top dust removing seat (2011), a supporting vertical plate (2012) and a bottom dust removing seat (2013), a dust removing pump air passage (2014) and a dust removing air suction passage (2015) are arranged inside the top dust removing seat (2011) and the bottom dust removing seat (2013), a communicating air passage is arranged inside the interphone body (1), one end of the communicating air passage is connected with the dust removing pump air passage (2014), and the other end of the communicating air passage extends to a dust screen of a sound receiving and playing part inside the interphone body (1).

5. A police interphone with dustproof protection structure as in claim 4, characterized by that: the inside pump gas check valve (20141) that is equipped with of air flue of dust removal pump air flue (2014), and the inside check valve (20151) of breathing in that is equipped with that plays of dust removal suction channel (2015).

6. A police interphone with dustproof protection structure as in claim 2, characterized by that: the piston push-out tabs (301) are symmetrically arranged in two groups, the top and the bottom in the shell of the main shell (202) are respectively provided with a gas compression cavity (2021), the two piston push-out tabs (301) are respectively inserted into the two gas compression cavities (2021), and the heights of the two piston push-out tabs (301) in the two gas compression cavities (2021) are the same.

7. A police interphone with dustproof protection structure as in claim 6, characterized by that: two be equipped with between piston push jack (301) drive rack (3011), and the top and the bottom of drive rack (3011) are fixed connection respectively and are outside at the lamellar body of two piston push jacks (301), the body of rod outside of power pole (302) is equipped with drive ring gear (3021), and the ring body of drive ring gear (3021) is convex design, drive rack (3011) all is equipped with one in the both sides of drive ring gear (3021) ring body, drive rack (3011) only can be connected with the drive rack (3011) transmission of one side when rotating.

8. A police interphone with dustproof protection structure as in claim 7, characterized by that: the middle of the rod body of the power rod (302) is provided with a driving gear (3022), the top of the rod body of the linkage rod (403) is provided with a driving rack (4031), and the driving rack (4031) is in transmission connection with the driving gear (3022).

9. A police interphone with dustproof protection structure as in claim 8, characterized by that: the body of rod both sides of gangbar (403) all are equipped with track locating piece (4032), and two track locating pieces (4032) are the symmetry design, the inside track constant head tank (2022) that is equipped with of casing of installation main housing (202), and track locating piece (4032) are pegged graft in the inside of track constant head tank (2022), the plate body side of supporting riser (2012) is equipped with the spring beam, and reset spring (4033) has been cup jointed to the body of rod outside of spring beam, the both ends difference fixed connection of reset spring (4033) is inside the body of rod of gangbar (403) and the plate body inboard of supporting riser (2012).

10. A police interphone with dustproof protection structure as in claim 3, characterized by that: the linkage groove (4021) is formed in the body of the holding rod (402), the groove body of the linkage groove (4021) is in a long strip shape, the push-pull rod (4034) is arranged outside the body of the linkage rod (403), the cross section of the push-pull rod (4034) is in a T-shaped design, and the cross bar of the push-pull rod (4034) is inserted into the linkage groove (4021).

Technical Field

The invention belongs to the technical field of dustproof of interphones, and particularly relates to a police interphone with a dustproof protection structure.

Background

The interphone is a two-way mobile communication tool, can be used for communication without any network support, is suitable for relatively fixed and frequent communication occasions, is frequently used by police when the police perform tasks, is provided with a receiving slot at the receiving and playing part for enhancing the receiving and playing effects, and is provided with a dustproof filter screen or a dustproof filter sheet at the bottom for dust prevention.

If the application number is: CN201210430087.7 discloses an intercom with a detachable and washable speaker dust-proof structure, which comprises a cover shell, a speaker and a speaker dust-proof structure; the speaker dustproof structure comprises a speaker cover, a speaker metal baffle, a speaker rubber pad, a microphone dustproof and breathable film attached to a microphone hole of the face shell and a speaker dustproof net attached to a sink table of the speaker cover; the periphery of the outer edge of the loudspeaker is sleeved in the annular side groove of the loudspeaker rubber pad; the loudspeaker rubber pad is positioned on the first sinking platform of the face shell, the loudspeaker is positioned in the loudspeaker hole of the second sinking platform of the face shell, and the loudspeaker rubber pad is fixed in the second sinking platform of the face shell in a sealing way by the metal baffle plate of the loudspeaker; the speaker cover further fixes the speaker rubber pad on the first sinking platform of the face housing. The speaker dustproof structure of the interphone can reduce dust and/or iron powder entering the speaker cavity to the maximum extent, and a user can take down the speaker cover and the speaker by himself even if a small amount of dust enters the speaker cavity, so that the speaker dustproof structure can be cleaned without disassembling the whole face shell.

The existing interphone radio and sound reproduction parts are provided with the sound receiving groove, so that dust at the parts is easily accumulated on the dustproof filter screen or the dustproof filter screen when the interphone radio and sound reproduction parts are used, the sound receiving groove is blocked, the size of normal radio and sound reproduction of the interphone is influenced, the dust inside the collecting groove is smeared and scratched by external rags and the like when the dust is cleaned at present, and the dust is difficult to operate, incomplete in dust removal, poor in effect and low in practicability due to the fact that the sound receiving groove and the filter screen are small.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a police interphone with a dustproof protection structure is provided to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a police interphone with a dustproof protection structure, which aims to solve the problems that the sound receiving and playing parts of the existing interphone are provided with sound receiving grooves, dust at the parts is easily accumulated on a dustproof filter screen or the dustproof filter screen when the interphone is used, the sound receiving grooves are blocked, and the normal sound receiving and playing of the interphone are influenced.

The invention has the purpose and the effect of the police interphone with the dustproof protection structure, and is achieved by the following specific technical means:

a police interphone with a dustproof protection structure comprises an interphone body;

the back side of the interphone body is fixedly screwed with a dustproof mounting shell through screws;

the dustproof mounting shell comprises a mounting side shell and a mounting main shell, the mounting side shell is screwed and fixed on the side surface of the shell of the mounting main shell through screws, and the mounting main shell is screwed and fixed in a mounting groove on the back side of the interphone body through screws;

the dust removal subassembly in the internally mounted of installation owner shell, and the side-mounting of installation owner shell has the dust removal linkage subassembly.

Further, the interior dust pelletizing subassembly includes:

the piston push sheet is inserted in the main mounting shell;

and two ends of the power rod are respectively and rotatably connected inside the shell provided with the main shell.

Further, the dust removal linkage subassembly includes:

the mounting fixing block is fixedly connected to the side face of the shell of the mounting main shell;

the top of the holding rod is rotatably connected inside the mounting fixing block;

the linkage rod is inserted in the shell of the main shell.

Furthermore, the installation side shell is composed of a top dust removal seat, a supporting vertical plate and a bottom dust removal seat, a dust removal pump air passage and a dust removal air suction passage are arranged inside the top dust removal seat and the bottom dust removal seat, a communication air passage is arranged inside the interphone body, one end of the communication air passage is connected with the dust removal pump air passage, and the other end of the communication air passage extends to a dust screen of a sound receiving and playing part inside the interphone body.

Furthermore, a pump air one-way valve is arranged inside an air passage of the dust removal pump air passage, and an air suction one-way valve is arranged inside the dust removal air suction passage.

Furthermore, the piston push rods are symmetrically arranged in two groups, the top and the bottom of the shell of the main shell are provided with gas compression cavities, the two piston push rods are respectively inserted into the two gas compression cavities, and the heights of the two piston push rods in the two gas compression cavity bodies are the same.

Furthermore, two be equipped with the transmission rack between the piston push jack, and the top and the bottom of transmission rack are fixed connection respectively and are outside at the lamellar body of two piston push jacks, and the body of rod outside of power rod is equipped with the transmission ring gear, and the ring body of transmission ring gear is convex design, and the transmission rack all is equipped with one in the both sides of transmission ring gear ring body, and the transmission rack only can be connected with the transmission rack transmission of one side when rotating.

Furthermore, a driving gear is arranged in the middle of the rod body of the power rod, a driving rack is arranged at the top of the rod body of the linkage rod, and the driving rack is in transmission connection with the driving gear.

Further, the body of rod both sides of gangbar all are equipped with the track locating piece, and two track locating pieces are the symmetrical design, and the inside track constant head tank that is equipped with of casing of installation main casing, and the track locating piece is pegged graft in the inside of track constant head tank, and the plate body side of supporting the riser is equipped with the spring beam, and the body of rod outside of spring beam has cup jointed reset spring, and reset spring's both ends difference fixed connection is inside the body of rod of gangbar and the plate body inboard of supporting the riser.

Furthermore, a linkage groove is formed in the rod body of the holding rod, the groove body of the linkage groove is in a long strip shape, a push-pull rod is arranged outside the rod body of the linkage rod, the cross section of the push-pull rod is in a T-shaped design, and a cross rod of the push-pull rod is inserted into the linkage groove.

Compared with the prior art, the invention has the following beneficial effects:

firstly, the intercom body is when using, can blow through dust removal pump air flue from the inside of intercom body to receiving and releasing the sound position through the interior dust removal subassembly of back of the body formula of inlaying, gas can be followed the inside and acted on by the dust of piling up at filter screen and radio reception slot part position, remove dust thoroughly, and is convenient high-efficient, and two gas compression chamber and two piston push jack mating reaction's alternative compression suction air remove dust, and gas supply is continuous, and dust removal effect is better, the practicality and the flexibility of the device have been improved.

Secondly, when the holding rod is pressed, the linkage groove of the holding rod drives the linkage rod to move towards the inside of the mounting main shell through the push-pull rod, the driving rack of the linkage rod drives the power rod to rotate through the driving gear when moving, the transmission gear ring can drive the piston push pieces to lift through the transmission rack when the power rod rotates, the transmission gear ring rotates for one circle to drive the two piston push pieces to lift once, two gas compression cavities can respectively perform air suction and air pumping operations in the process that the two piston push pieces lift once, and therefore dust removal operation is conveniently performed from the inside of the interphone body through the communicated air passage.

Moreover, when loosening the holding rod, the gangbar resets under reset spring's effect, and the gangbar drives the holding rod through the linkage groove when resetting the push-and-pull rod and resets, and two gas compression chambeies of this in-process piston push jack under the drive of power rod have carried out the operation of pump gas and bleeding again respectively, circulate this operation sustainable through interior dust removal subassembly from the continuous pump gas dust removal of intercom body's inside, dust removal effect is good, and two alternate use in gas compression chamber, can guarantee that the inside that has a gas compression chamber all the time is in the pump gas state, the phenomenon of gas interruption can not appear in the gas pumping process, it is stable to remove dust, the flexibility and the adaptability of the device have been improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the backside of fig. 1 according to the present invention.

FIG. 3 is a schematic view of the dust extraction linkage assembly of the present invention when not in use.

Fig. 4 is a schematic structural view of the dustproof mounting case of the present invention.

Fig. 5 is a schematic view of the internal structure of fig. 4 according to the present invention.

FIG. 6 is a schematic view of the interior of the dust-proof housing when the holding rod is pressed.

Fig. 7 is a schematic view of the structure of the installation-side case of the present invention.

Fig. 8 is a structural schematic diagram of the present invention after the main housing and the piston push plate are assembled and disassembled.

FIG. 9 is a schematic structural view of the power rod and linkage rod of the present invention after disassembly.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. an interphone body; 2. a dust-proof mounting shell; 201. mounting a side shell; 2011. a top dust removal seat; 2012. supporting a vertical plate; 2013. a bottom dust removal base; 2014. an air passage of the dust removal pump; 20141. a pump gas check valve; 2015. a dust removal air suction duct; 20151. an air suction check valve; 202. installing a main shell; 2021. a gas compression chamber; 2022. a track positioning slot; 3. an inner dust removal assembly; 301. a piston push sheet; 3011. a drive rack; 302. a power rod; 3021. a transmission gear ring; 3022. a driving gear; 4. a dust removal linkage assembly; 401. mounting a fixed block; 402. a holding rod; 4021. a linkage groove; 403. a linkage rod; 4031. a driving rack; 4032. a rail positioning block; 4033. a return spring; 4034. a push-pull rod.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 9:

the invention provides a police interphone with a dustproof protection structure, which comprises an interphone body 1;

the back side of the interphone body 1 is fixedly screwed with a dustproof mounting shell 2 through screws;

the dustproof mounting shell 2 comprises a mounting side shell 201 and a mounting main shell 202, wherein the mounting side shell 201 is screwed and fixed on the side surface of the shell of the mounting main shell 202 through screws, and the mounting main shell 202 is screwed and fixed in a mounting groove on the back side of the interphone body 1 through screws;

the side mounting shell 201 consists of a top dust removing seat 2011, a supporting vertical plate 2012 and a bottom dust removing seat 2013, a dust removing pump air duct 2014 and a dust removing air suction duct 2015 are arranged in the top dust removing seat 2011 and the bottom dust removing seat 2013, a communicating air duct is arranged in the interphone body 1, one end of the communicating air duct is connected with the dust removing pump air duct 2014, and the other end of the communicating air duct extends to a dust screen of a sound receiving and playing part in the interphone body 1;

an inner dust removal component 3 is arranged in the main mounting shell 202, and a dust removal linkage component 4 is arranged on the side surface of the main mounting shell 202;

the inner dust removing component 3 comprises:

the piston push sheet 301, the piston push sheet 301 is inserted in the main mounting shell 202;

and two ends of the power rod 302 are respectively and rotatably connected inside the shell for mounting the main shell 202.

Dust removal linkage subassembly 4 is including:

a mounting fixing block 401, wherein the mounting fixing block 401 is fixedly connected to the side surface of the housing of the mounting main shell 202;

the top of the holding rod 402 is rotatably connected inside the mounting fixing block 401;

the linkage rod 403 is inserted into the shell of the main mounting shell 202;

in use, when the interphone body 1 is used, the air blowing and dust removing operation can be carried out from the inside of the interphone body 1 to the sound receiving and releasing part through the dust removing pump air passage 2014 by the back embedded type inner dust removing component 3, air can act on dust accumulated at the positions of the filter screen and the sound receiving groove from the inside, the dust removal is thorough, the convenience and the high efficiency are realized, the dust removal is carried out by alternately compressing and sucking air under the matching action of the two air compression cavities 2021 and the two piston push sheets 301, the air supply is continuous, the dust removing effect is better,

wherein, the inside pump gas check valve 20141 that is equipped with of air flue of dust removal pump air flue 2014, and the dust removal is breathed in inside being equipped with the check valve 20151 of breathing in of playing of saying 2015, piston push jack 301 is equipped with the symmetry two sets ofly, and the top in the installation main shell 202 casing all is equipped with gas compression chamber 2021 with the bottom, two piston push jacks 301 are pegged graft respectively in the inside of two gas compression chambers 2021, and two piston push jacks 301 are the same at the inside height in two gas compression chambers 2021 cavities, in use, two gas compression chambers 2021 of in-process that two piston push jacks 301 go up and down once can carry out the operation of bleeding and pump gas respectively, thereby the convenient operation of removing dust from intercom body 1's inside, and convenient and flexible use.

Wherein, a transmission rack 3011 is arranged between the two piston push plates 301, the top and the bottom of the transmission rack 3011 are respectively and fixedly connected to the outside of the body of the two piston push plates 301, a transmission toothed ring 3021 is arranged on the outer side of the rod body of the power rod 302, the ring body of the transmission toothed ring 3021 is designed in a circular arc shape, one transmission rack 3011 is arranged on each of the two sides of the ring body of the transmission toothed ring 3021, the transmission rack 3011 can be in transmission connection with the transmission rack 3011 on one side only when rotating, in use, the driving toothed bar 4031 drives the power rod 302 to rotate through the driving gear 3022 when the linkage rod 403 moves, the transmission toothed ring 3021 can drive the piston push plates 301 to go up and down through the transmission rack 3011 when the power rod 302 rotates, and the transmission toothed ring 3021 rotates one circle to drive the two piston push plates 301 to go up and down once.

Wherein, both sides of the body of the linkage rod 403 are provided with rail positioning blocks 4032, and the two rail positioning blocks 4032 are symmetrically designed, the inside of the housing of the mounting main shell 202 is provided with a rail positioning groove 2022, and the rail positioning blocks 4032 are inserted into the inside of the rail positioning groove 2022, the side surface of the body of the support upright plate 2012 is provided with a spring rod, and the outside of the body of the spring rod is sleeved with a return spring 4033, both ends of the return spring 4033 are respectively and fixedly connected to the inside of the body of the linkage rod 403 and the inside of the body of the support upright plate 2012, in use, the rail positioning blocks 4032 can limit the moving track of the linkage rod 403 through the rail positioning groove 2022, so that the linkage rod 403 cannot be tilted and twisted to cause the phenomenon of device locking failure to be raised in the moving process, and when the holding rod 402 is released, the linkage rod 403 is reset under the action of the return spring 4033, and the push-pull rod 4034 drives the holding rod 402 to reset through the linkage groove 4021 when the linkage rod 403 is reset, and this in-process piston push jack 301 has carried out the operation of pump gas and bleeding respectively again under the drive of power pole 302 in two gas compression chamber 2021, circulate this operation sustainable through interior dust removal component 3 from the interior continuous pump gas dust removal of intercom body 1's inside, dust removal effect is good, and the alternate use of two gas compression chamber 2021, can guarantee that the inside that has a gas compression chamber 2021 is in the pump gas state all the time, the phenomenon that gas interruption can not appear in the gas pumping process, dust removal is stable.

The linkage groove 4021 is formed in the body of the holding rod 402, the groove body of the linkage groove 4021 is in a long strip shape, the push-pull rod 4034 is arranged outside the body of the linkage rod 403, the cross section of the push-pull rod 4034 is in a T-shaped design, the cross bar of the push-pull rod 4034 is inserted into the linkage groove 4021, the driving gear 3022 is arranged in the middle of the body of the power rod 302, the driving rack 4031 is arranged on the top of the body of the linkage rod 403, the driving rack 4031 is in transmission connection with the driving gear 3022, and in use, when the holding rod 402 is pressed, the linkage groove 4021 of the holding rod 402 drives the linkage rod to move towards the inside of the mounting main shell 202 through the push-pull rod 4024.

In another embodiment, the gas inlet department of dust removal suction channel 2015 is equipped with dustproof filter screen, and dustproof filter screen passes through the buckle to be installed in the outside of dust removal suction channel 2015 air inlet, convenient dismantlement, can avoid dust and impurity to get into the inside of gas compression chamber 2021 simultaneously, and when dust removal linkage subassembly 4 does not use, accessible location pin pole will hold pole 402 and fix the inside of fixing at installation fixed block 401 and hide, occupation space is little, conveniently carries.

The specific use mode and function of the embodiment are as follows:

in the invention, when the interphone body 1 is normally used, the inner dust removing component 3 can be controlled by the dust removing linkage component 4 to perform dust removing operation on the sound receiving and releasing slot part of the interphone body 1 at any time, when the holding rod 402 is pressed, the linkage slot 4021 of the holding rod 402 drives the linkage rod 403 to move towards the inside of the main mounting shell 202 through the push-pull rod 4034, the driving rack 4031 drives the power rod 302 to rotate through the driving gear 3022 when the linkage rod 403 moves, the driving rack 3021 can drive the piston push plates 301 to lift through the driving rack 3011 when the power rod 302 rotates, the driving rack 3021 rotates for one circle to drive the two piston push plates 301 to lift once, the two gas compression cavities 2021 can respectively perform air suction and pumping operations when the holding rod 301 lifts once, when the holding rod 402 is released, the linkage rod 403 resets under the action of the reset spring 4033, and the push-pull rod 403 drives the holding rod 402 to reset through the linkage slot 4021 when the linkage rod 403 resets, and in the process, the two gas compression chambers 2021 are respectively driven by the power rod 302 to pump air and extract air by the piston push sheet 301, the operation can be circulated to continuously pump air to remove dust from the interior of the interphone body 1 through the inner dust removal component 3, the dust removal effect is good, and the two gas compression chambers 2021 can be alternately used, so that the situation that the interior of one gas compression chamber 2021 is always in a pump air state can be ensured, the phenomenon of gas interruption can not occur in the gas pumping process, the dust removal is stable, when the interphone body 1 is used, the air blowing dust removal operation can be carried out from the interior of the interphone body 1 to the sound receiving and releasing position through the dust removal pump air passage 2014 by the back embedded inner dust removal component 3, the gas can act on dust accumulated at the positions of the filter screen and the sound receiving groove from the interior, the dust removal is thorough, the convenience and high efficiency are achieved, and the dust removal can be carried out by alternately compressing and sucking air through the cooperation of the two gas compression chambers 2021 and the two piston push sheets 301, the gas supply is continuous, and the dust removal effect is better.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.