CN114070345B

CN114070345B - Police interphone with seamless butt joint design

Info

Publication number: CN114070345B
Application number: CN202111390342.5A
Authority: CN
Inventors: 张远军
Original assignee: Shenzhen Zhishang Shijia Technology Co ltd
Current assignee: Shenzhen Zhishang Shijia Technology Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-10-18
Anticipated expiration: 2041-11-23
Also published as: CN114070345A

Abstract

The invention relates to the technical field of police interphones, in particular to a police interphone with seamless butt joint design, which comprises an interphone main body, wherein the interphone main body is positioned in a shell mechanism with detachable and fixed functions, the shell mechanism is connected with a sliding sleeve mechanism in a sliding manner, a bearing seat is arranged on one side of the sliding sleeve mechanism, a mounting groove is arranged on the bearing seat, and the bearing seat is connected with a fastening mechanism; through fastening device's settlement, not only can fix the intercom on police service personnel's arm fast, the police service personnel of being convenient for carry the intercom, can tighten up the size of belt according to actual conditions police service personnel's arm thickness simultaneously, improve the practicality of this intercom, secondly when police service personnel need use the intercom, only need lift up the arm to make the police service personnel's that the intercom can press close to oral area, make things convenient for police service personnel to official working under the special circumstances.

Description

Police interphone with seamless butt joint design

Technical Field

The invention relates to the technical field of police interphones, in particular to a police interphone with seamless butt joint design.

Background

The police interphone is also called as a police wireless interphone and is specially used for communicating wireless communication services in eight departments of public security, inspection, courtroom, judicial expertise, safety, customs, army and armed police. In order to ensure the safety of communication services of the special departments, the national radio management department specially plans a plurality of groups of frequencies for the use of the special departments, wherein the frequency range is 350 to 390MHz, and the 350MHz to 370MHz are mainly used for a police system to use a police officer to wear an interphone when law enforcement is carried out, and the interphone can carry out dynamic and static field condition digital recording in the law enforcement process, so that the police officer can conveniently use the law enforcement in various environments.

However, the problem exists in the process of using the interphone, 1. As the working environment of the police officer is more complex, the interphone is often collided, beaten and the like, so that the interphone is easy to damage and is not beneficial to the long-term use of the interphone by the police officer; 2. the police interphone is designed to solve the problems that police need to carry the interphone by hand when the police are out of police, and the case needs to be recorded while the interphone is held when the police are used, so that the police interphone is inconvenient to carry and use.

Disclosure of Invention

The invention aims to provide a police interphone with seamless butt joint design, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an intercom for police with a seamless butt joint design comprises an intercom main body, wherein the intercom main body is positioned in a shell mechanism with detachable and fixed functions, the shell mechanism is connected with a sliding sleeve mechanism in a sliding mode, a bearing seat is arranged on one side of the sliding sleeve mechanism, a mounting groove is formed in the bearing seat, and the bearing seat is connected with a fastening mechanism;

casing mechanism includes the rubber sleeve, and the rubber sleeve cover is established on the intercom main part, and rubber sleeve one side sets up the enclosing cover, and the rubber sleeve opposite side sets up the bottom plate, all sets up four group's through-holes on bottom plate and the rubber sleeve, sets up four group's groove one on the bottom plate, and groove one intercommunication through-hole sets up the docking mechanism who has quick fixed function in the through-hole, and the bottom plate bilateral symmetry sets up two sets of spouts, sets up fixed establishment in the bottom plate, and fixed establishment connects the spring bolt.

Preferably, docking mechanism includes the reference column, and reference column one end sets up rotary damper, and rotary damper imbeds the enclosing cover, and the equidistance sets up a plurality of draw-in grooves on the reference column, draw-in groove joint fixture block, and fixture block fixed connection accepts the axle, accepts axle sliding connection groove one, accepts axle one end fixed connection guide pillar, and the cover is established spring one on the guide pillar, sets up upright bearing on the guide pillar, in the upright bearing embedded groove one.

Preferably, the fixing mechanism comprises a first gear, the middle of the first gear is connected with the transmission shaft, one end of the transmission shaft is provided with a bearing, the bearing is embedded into the bottom plate, the first gear is meshed with the rack, one end of the rack is fixedly connected with the compression bar, the vertical bearing is arranged on the compression bar, the vertical bearing is embedded into the bottom plate, the other end of the transmission shaft is connected with the disc, and two groups of pull rods are arranged on one side of the disc.

Preferably, the spring bolt includes the guide bar, sets up upright bearing on the guide bar, upright bearing embedding bottom plate, guide bar one end fixed connection stopper, guide bar one end fixed connection push pedal, push pedal fixed connection spring two, two one end fixed connection bottom plates of spring.

Preferably, the sliding sleeve mechanism includes the sliding sleeve, sets up the butt joint groove on the sliding sleeve, and the butt joint groove bilateral symmetry sets up two sets of rectangular channels, sets up the gyro wheel in the rectangular channel, rectangular channel sliding connection bottom plate, two sets of axle one of gyro wheel both ends symmetry, axle one end set up the bearing, and the bearing imbeds the rectangular channel lateral wall, and the spout is connected in the gyro wheel rotation, and the thickness of gyro wheel equals the groove width of spout.

Preferably, fastening device includes the belt, and belt one end fixed connection fixing base, belt equidistance set up a plurality of rectangular holes, and the fixing base is articulated to be marchd the casing, sets up marching groove in the casing of marching, marching groove sliding connection belt, sets up advancing mechanism in the marching groove.

Preferably, the advancing mechanism comprises a second gear, the second gear is provided with two groups, two ends of the second gear are symmetrically provided with two groups of driven shafts, one end of each driven shaft is connected with a third gear, the two groups of gears are meshed with each other, four groups of transmission columns are symmetrically arranged on two sides of the second gear, the other end of one group of driven shafts is connected with a worm wheel, the worm wheel is meshed with a worm, and the worm is connected with the rotary table.

Preferably, two ends of the pull rod are symmetrically provided with two groups of first pin shafts, one end of each first pin shaft is provided with a bearing, one group of bearings are embedded into one side of the disc deviated from the axis, and the other group of bearings are embedded into the push plate.

Preferably, two groups of pin shafts II are symmetrically arranged on two sides of the fixing seat, a bearing is arranged at one end of each pin shaft II, and the bearing is embedded into a support plate arranged on the advancing shell.

Preferably, a first bearing is arranged on the driven shaft and embedded into the advancing shell, two groups of gears are symmetrically distributed on two sides of the belt, a second gear is meshed with the rectangular hole, two groups of second bearings are symmetrically arranged at two ends of the transmission column and embedded into the advancing shell, the transmission column is rotatably connected with the belt, a bearing is arranged at one end of the worm, and the bearing is embedded into a support arranged on the advancing shell.

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

1. through the setting of the outer cover, the rubber sleeve, the bottom plate and the butt joint mechanism, the main body of the interphone is prevented from being directly impacted by external force, the main body of the interphone is protected, meanwhile, police officers can conveniently install and detach the shell mechanism, and the practicability of the device is improved;

2. the guide rod pushes the limiting block to slide between the two groups of rollers, so that the bottom plate is fixed on the sliding sleeve, and police can conveniently take and place the shell mechanism by setting the fixing mechanism and the sliding sleeve mechanism, so that the police can more conveniently work, and the working efficiency of the police is improved;

3. through fastening device's settlement, not only can fix the intercom on police service personnel's arm fast, the police service personnel of being convenient for carry the intercom, can tighten up the size of belt according to actual conditions police service personnel's arm thickness simultaneously, improve the practicality of this intercom, secondly when police service personnel need use the intercom, only need lift up the arm to make the police service personnel's that the intercom can press close to oral area, make things convenient for police service personnel to official working under the special circumstances.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view, partially in section, of the structural housing mechanism of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a combination view of the sliding sleeve mechanism, the fixing mechanism and the spring bolt of the present invention;

FIG. 5 is a schematic view of a structural fastening mechanism of the present invention;

fig. 6 is a schematic sectional view of the traveling housing and the traveling mechanism of the present invention.

In the figure: 1. an interphone body; 2. a housing mechanism; 3. a sliding sleeve mechanism; 4. a bearing seat; 5. mounting grooves; 6. a fastening mechanism; 201. a rubber sleeve; 202. an outer cover; 203. a base plate; 204. a through hole; 205. a docking mechanism; 206. a chute; 207. a fixing mechanism; 208. a spring bolt; 209. a first groove; 2051. a positioning column; 2052. a card slot; 2053. a clamping block; 2054. a bearing shaft; 2055. a first spring; 2056. a guide post; 2071. a pressure lever; 2072. a rack; 2073. a first gear; 2074. a disc; 2075. a pull rod; 2076. a drive shaft; 2081. pushing the plate; 2082. a second spring; 2083. a guide bar; 2084. a limiting block; 301. a sliding sleeve; 302. a butt joint groove; 303. a rectangular groove; 304. a roller; 601. a belt; 602. a fixed seat; 603. a rectangular hole; 604. a traveling housing; 605. a traveling groove; 606. a traveling mechanism; 6061. a second gear; 6062. a driven shaft; 6063. a third gear; 6064. a drive post; 6065. a worm gear; 6066. a worm; 6067. a turntable.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a technical solution: a police interphone with a seamless butt joint design comprises an interphone body 1, wherein the interphone body 1 is located in a shell mechanism 2 with detachable and fixed functions, the shell mechanism 2 is connected with a sliding sleeve mechanism 3 in a sliding mode, a bearing seat 4 is arranged on one side of the sliding sleeve mechanism 3, a mounting groove 5 is formed in the bearing seat 4, and the bearing seat 4 is connected with a fastening mechanism 6; the shell mechanism 2 comprises a rubber sleeve 201, the rubber sleeve 201 is sleeved on the interphone body 1, one side of the rubber sleeve 201 is provided with an outer cover 202, the other side of the rubber sleeve 201 is provided with a bottom plate 203, four groups of through holes 204 are respectively arranged on the bottom plate 203 and the rubber sleeve 201, four groups of groove I209 are arranged on the bottom plate 203, the groove I209 is communicated with the through hole 204, a docking mechanism 205 with a quick fixing function is arranged in the through hole 204, two groups of sliding grooves 206 are symmetrically arranged on two sides of the bottom plate 203, a fixing mechanism 207 is arranged in the bottom plate 203, the fixing mechanism 207 is connected with a spring bolt 208, the docking mechanism 205 comprises a positioning column 2051, one end of the positioning column 2051 is provided with a rotary damper, the rotary damper is embedded into the outer cover 202, a plurality of clamping grooves 2052 are arranged at equal intervals on the positioning column 2051, the clamping grooves 2052 are clamped with a clamping block 2053, the clamping block 2053 is fixedly connected with a bearing shaft 2054, the bearing shaft 2054 is connected with the sliding connecting groove I209, one end of the bearing shaft 2054 is fixedly connected with a guide pillar 2056, a spring I2055 is sleeved on the guide pillar 2056, the upright bearing is arranged on the guide post 2056 and is embedded into the first groove 209, wherein the rubber sleeve 201 is relatively soft and elastic, when the interphone body 1 needs to be installed in the shell mechanism 2, the rubber sleeve 201 is sleeved on the interphone body 1, then four groups of positioning posts 2051 on the outer cover 202 are guided into four groups of through holes 204 on the rubber sleeve 201, so that the outer cover 202 is in butt joint with the rubber sleeve 201, then the four groups of through holes 204 on the bottom plate 203 are in butt joint with the four groups of positioning posts 2051, when the positioning posts 2051 are guided into the through holes 204 on the bottom plate 203, the positioning posts 2051 extrude the clamping blocks 2053, the clamping blocks 2053 push the bearing shafts 2054, the bearing shafts 2054 linearly retreat under the matching action of the guide post 2056 and the upright bearing, and the first spring 2055 is compressed, the bottom plate 203 is pressed with force, so that the bottom plate 203 extrudes the rubber sleeve 201 to deform the rubber sleeve 201 until the rubber sleeve 201 under the action of the counter elasticity of the first spring 2055, the fixture block 2053 slides into the fixture groove 2052 on the positioning column 2051, so that the rubber sleeve 201 is clamped between the bottom plate 203 and the outer cover 202, and then when the interphone main body 1 needs to be detached, the positioning column 2051 is rotated through a wrench, so that the fixture groove 2052 on the positioning column 2051 is staggered with the fixture block 2053, and the fixture block 2053 is released from fixing the positioning column 2051, so that the interphone main body 1 is prevented from being directly impacted by external force through setting the outer cover 202, the rubber sleeve 201, the bottom plate 203 and the docking mechanism 205, the interphone main body 1 is protected, meanwhile, police officers can conveniently install and detach the shell mechanism 2, and the practicability of the device is improved;

the fixing mechanism 207 comprises a first gear 2073, the middle of the first gear 2073 is connected with a transmission shaft 2076, one end of the transmission shaft 2076 is provided with a bearing, the bearing is embedded into the bottom plate 203, the first gear 2073 is meshed with a rack 2072, one end of the rack 2072 is fixedly connected with a pressure rod 2071, the pressure rod 2071 is provided with a vertical bearing, the vertical bearing is embedded into the bottom plate 203, the other end of the transmission shaft 2076 is connected with a disk 2074, one side of the disk 2074 is provided with two groups of pull rods 2075, the spring bolt 208 comprises a guide rod 2083, the guide rod 2083 is provided with a vertical bearing, the vertical bearing is embedded into the bottom plate 203, one end of the guide rod 2083 is fixedly connected with a limit block 2084, one end of the guide rod 2083 is fixedly connected with a push plate 2081, the push plate 2081 is fixedly connected with a second spring 2082, one end of the second spring 2082 is fixedly connected with the bottom plate 203, the sliding sleeve mechanism 3 comprises a sliding sleeve 301, the sliding sleeve 302 is provided with a butt groove 302, two sets of two rectangular grooves 303 are symmetrically arranged on two sides of the butt groove 302, rollers 304 are arranged in the rectangular groove 303, the rectangular groove 303 are arranged in the rectangular groove 303, the sliding connection with the bottom plate 203, two sets of first shafts are symmetrically arranged at two ends of a roller 304, one end of each shaft is provided with a bearing, the bearing is embedded into the side wall of the rectangular groove 303, the roller 304 is rotatably connected with the sliding groove 206, the thickness of the roller 304 is equal to the groove width of the sliding groove 206, two sets of first pin shafts are symmetrically arranged at two ends of a pull rod 2075, one end of each pin shaft is provided with a bearing, one set of bearings are embedded into one side of a disc 2074 deviating from the axis center, the other set of bearings are embedded into a push plate 2081, the distance between the rollers 304 is equal to the length of a limit block 2084, when the shell mechanism 2 is required to be installed on the sliding sleeve mechanism 3, the press rod 2071 is pressed, the press rod 2071 vertically pushes a rack 2072 downwards, the movement of the rack 2072 drives the first gear 2073 to rotate, the first gear 2073 enables the disc 4 to rotate through a transmission shaft 2076, the disc 2074 pulls the two sets of push plates 2081 to move oppositely through the two sets of pull rods 2075, the push plate 2081 pulls the limit block 2084 through a guide rod 2084, and stretches a spring two 2082 to enable the limit block 2082 to enter the limit block 206, then the bottom plate 203 is moved along the butt joint groove 302, meanwhile, the rollers 304 rotate along the sliding groove 206, the bottom plate 203 can move along the butt joint groove 302 conveniently until the bottom plate 203 moves to the bottom of the butt joint groove 302, the pressure rod 2071 is loosened, and under the action of the rebounding force of the spring two 2082, the push plate 2081 pushes the limiting block 2084 to slide between the two groups of rollers 304 through the guide rod 2083, so that the bottom plate 203 is fixed on the sliding sleeve 301, and therefore, police officers can conveniently take and place the shell mechanism 2 through setting of the fixing mechanism 207 and the sliding sleeve mechanism 3, the police officers can more conveniently work in the working process, and the working efficiency of the police officers is improved;

the fastening mechanism 6 comprises a belt 601, one end of the belt 601 is fixedly connected with a fixed seat 602, a plurality of rectangular holes 603 are arranged on the belt 601 at equal distances, the fixed seat 602 is hinged with a travelling housing 604, a travelling groove 605 is arranged in the travelling housing 604, the travelling groove 605 is connected with the belt 601 in a sliding way, a travelling mechanism 606 is arranged in the travelling groove 605, the travelling mechanism 606 comprises two gears 6061, two groups of gears 6061 are arranged, two ends of the gears 6061 are symmetrically provided with two groups of driven shafts 6062, one end of the driven shafts 6062 is connected with a gear three 6063, two groups of gears three 6063 are meshed, two sides of the gear two 6061 are symmetrically provided with four groups of transmission columns 6064, the other end of one group of the driven shafts 6062 is connected with a worm gear 6065, the worm 6065 is meshed with a worm 6066, the worm 6066 is connected with a rotary disc 6067, two groups of pin shafts two ends of the fixed seat 602 are symmetrically arranged, one end of the pin shafts are provided with bearings, the bearings are embedded into support plates arranged on the travelling housing 604, a bearing I is arranged on the driven shaft 6062, and the bearing I is embedded into the travelling housing 604, two groups of gears 6061 are symmetrically distributed on two sides of a belt 601, the gears 6061 are meshed with a rectangular hole 603, two groups of bearings II are symmetrically arranged at two ends of a transmission column 6064, the bearings II are embedded into a travelling shell 604, the transmission column 6064 is rotationally connected with the belt 601, a bearing is arranged at one end of a worm 6066 and is embedded into a support arranged on the travelling shell 604, wherein the belt 601 is made of cow leather, the belt 601 is fixedly arranged in a mounting groove 5 arranged on a bearing seat 4 through bolts, the width of the mounting groove 5 is equal to that of the belt 601, a bearing seat 4 is welded on a sliding sleeve 301, when an alarm is issued by an officer needing to carry an interphone, the belt 601 is sleeved on an arm, a rotary disc 6067 is rotated after the position is determined, the rotary disc 6067 drives the worm 6066 to rotate, the worm 6066 to rotate a worm 6065, the worm 6065 drives one group of gears 6061 to rotate through a group of driven shafts 6062, the group of gears 6061 is in gear transmission through two groups of gears 6063, the other two 6061 gears rotate reversely, the two 6061 gears move the belt 601 along the moving groove 605 through the rectangular holes 603, the belt 601 is continuously tightened, the fastening mechanism 6 is fixed on the arm of the police officer, therefore, the interphone can be quickly fixed on the arm of the police officer through the setting of the fastening mechanism 6, the police officer can conveniently carry the interphone, meanwhile, the size of the belt 601 can be tightened according to the arm thickness of the police officer under the actual condition, the practicability of the interphone is improved, and when the police officer needs to use the interphone, the arm only needs to be lifted, so that the interphone can be close to the mouth of the police officer, and the police officer can conveniently work under the special condition.

The working principle is as follows: in the using process, the rubber sleeve 201 is sleeved on the interphone body 1, then four groups of positioning columns 2051 on the outer cover 202 are guided into four groups of through holes 204 on the rubber sleeve 201, so that the outer cover 202 is in butt joint with the rubber sleeve 201, then four groups of through holes 204 on the bottom plate 203 are in butt joint with four groups of positioning columns 2051, when the positioning columns 2051 are guided into the through holes 204 on the bottom plate 203, the positioning columns 2051 extrude the fixture blocks 2053, the fixture blocks 2053 push the bearing shafts 2054, the bearing shafts 2054 linearly retreat under the matching action of the guide columns 2056 and the vertical bearings, and the springs 2055 are compressed, the bottom plate 203 is pressed forcibly, so that the bottom plate 203 extrudes the rubber sleeve 201, the rubber sleeve 201 is deformed until the fixture blocks 2053 slide into the clamping grooves 2052 on the positioning columns 2051 under the action of the rebound force of the springs 2055, so that the rubber sleeve 201 is clamped between the bottom plate 203 and the outer cover 202, when the shell mechanism 2 is required to be installed on the sliding sleeve mechanism 2071, the rack 2072 is pushed downwards vertically by the pressure lever 2071, the movement of the rack 2072 drives the gear one 2073 to rotate, the gear one 2073 drives the disc 2074 to rotate through the transmission shaft 2076, the disc 2074 drives the two groups of push plates 2081 to move oppositely through the two groups of pull rods 2075, the push plates 2081 drive the limit blocks 2084 through the guide rods 2083 and stretch the springs two 2082 to enable the limit blocks 2084 to enter the sliding grooves 206, then the bottom plate 203 moves along the butt-joint grooves 302, meanwhile, the rollers 304 rotate along the sliding grooves 206, so that the bottom plate 203 can move along the butt-joint grooves 302 conveniently until the bottom plate 203 moves to the bottom of the butt-joint grooves 302, the pressure lever 2071 is loosened, the push plate 2081 pushes the limit blocks 2084 to slide between the two groups of rollers 304 through the guide rods 2083 under the action of the counter-elastic force of the springs 2082, when police officers need to take out an alarm, the interphone, the belt 601 is sleeved on the arms, the turntables 6067 are rotated after the positions are determined, the turntables 6067 are driven by the turntables 6066 to rotate, the rotation of the worm 6066 rotates the worm wheel 6065, the worm wheel 6065 rotates one set of the second gears 6061 through one set of the driven shafts 6062, one set of the second gears 6061 is in toothed transmission through two sets of the third gears 6063, the other set of the second gears 6061 rotates in the opposite direction, the two sets of the second gears 6061 move the belt 601 along the traveling groove 605 through the rectangular hole 603, the belt 601 is continuously tightened, and the fastening mechanism 6 is fixed on the arm of the police officer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a seamless butt joint design's alert intercom, includes the intercom main part, its characterized in that: the interphone body is positioned in a shell mechanism with detachable and fixed functions, the shell mechanism is connected with a sliding sleeve mechanism in a sliding mode, a bearing seat is arranged on one side of the sliding sleeve mechanism, a mounting groove is formed in the bearing seat, and the bearing seat is connected with a fastening mechanism;

the shell mechanism comprises a rubber sleeve, the rubber sleeve is arranged on an interphone body in a sleeved mode, an outer cover is arranged on one side of the rubber sleeve, a bottom plate is arranged on the other side of the rubber sleeve, four groups of through holes are formed in the bottom plate and the rubber sleeve, four groups of grooves I are formed in the bottom plate and communicated with the through holes, a docking mechanism with a quick fixing function is arranged in the through holes, two groups of sliding grooves are symmetrically arranged on two sides of the bottom plate, fixing mechanisms are arranged in the bottom plate and connected with spring bolts, the docking mechanism comprises positioning columns, one ends of the positioning columns are provided with rotary dampers, the rotary dampers are embedded into the outer cover, a plurality of clamping grooves are formed in the positioning columns at equal intervals, clamping grooves are clamped with clamping blocks, the clamping blocks are fixedly connected with bearing shafts, the bearing shafts are slidably connected with the bearing grooves I, one ends of the bearing shafts are fixedly connected with guide columns, the springs I are sleeved on the guide columns, upright bearings are arranged on the guide columns, and the upright bearings are embedded into the grooves I.

2. A police interphone of seamless docking design as claimed in claim 1, characterized in that: the fixing mechanism comprises a first gear, the middle of the first gear is connected with a transmission shaft, one end of the transmission shaft is provided with a bearing, the bearing is embedded into a bottom plate, the first gear is meshed with a rack, one end of the rack is fixedly connected with a pressing rod, the pressing rod is provided with a vertical bearing, the vertical bearing is embedded into the bottom plate, the other end of the transmission shaft is connected with a disc, and two groups of pull rods are arranged on one side of the disc.

3. A police interphone with seamless docking design according to claim 1, characterized in that: the spring bolt comprises a guide rod, wherein an upright bearing is arranged on the guide rod, the upright bearing is embedded into the bottom plate, one end of the guide rod is fixedly connected with a limiting block, one end of the guide rod is fixedly connected with a push plate, the push plate is fixedly connected with a second spring, and one end of the second spring is fixedly connected with the bottom plate.

4. A police interphone with seamless docking design according to claim 1, characterized in that: the sliding sleeve mechanism comprises a sliding sleeve, a butt joint groove is formed in the sliding sleeve, two groups of rectangular grooves are symmetrically formed in the two sides of the butt joint groove, rollers are arranged in the rectangular grooves, the rectangular grooves are connected with the bottom plate in a sliding mode, two groups of shafts are symmetrical at the two ends of each roller, a bearing is arranged at one end of each shaft, the bearing is embedded into the side wall of each rectangular groove, the rollers are connected with the sliding grooves in a rotating mode, and the thickness of each roller is equal to the groove width of each sliding groove.

5. A police interphone of seamless docking design as claimed in claim 1, characterized in that: the fastening mechanism comprises a belt, one end of the belt is fixedly connected with a fixed seat, a plurality of rectangular holes are formed in the belt at equal intervals, the fixed seat is hinged with a travelling shell, a travelling groove is formed in the travelling shell, the travelling groove is connected with the belt in a sliding mode, and a travelling mechanism is arranged in the travelling groove.

6. A police interphone of seamless docking design as claimed in claim 5, characterized in that: the traveling mechanism comprises a second gear, the second gear is provided with two groups, two ends of the second gear are symmetrically provided with two groups of driven shafts, one end of each driven shaft is connected with a third gear, the two groups of driven shafts are meshed with the third gear, four groups of transmission columns are symmetrically arranged on two sides of the second gear, the other end of each driven shaft is connected with a worm wheel, the worm wheels are meshed with worms, and the worms are connected with a turntable.

7. A police interphone of seamless docking design as claimed in claim 2, characterized in that: two groups of first pin shafts are symmetrically arranged at two ends of the pull rod, one end of each first pin shaft is provided with a bearing, one group of the bearing is embedded into one side, deviating from the axis, of the disc, and the other group of the bearing is embedded into the push plate.

8. A police interphone of seamless docking design as claimed in claim 5, characterized in that: two groups of pin shafts II are symmetrically arranged on two sides of the fixed seat, one ends of the pin shafts II are provided with bearings, and the bearings are embedded into supporting plates arranged on the advancing shell.

9. A police interphone of seamless docking design as claimed in claim 6, characterized in that: the driven shaft is provided with a first bearing, the first bearing is embedded into the advancing shell, the two sets of gears are symmetrically distributed on two sides of the belt, the second gear is meshed with the rectangular hole, the two ends of the transmission column are symmetrically provided with a second bearing, the second bearing is embedded into the advancing shell, the transmission column is rotatably connected with the belt, one end of the worm is provided with a bearing, and the bearing is embedded into a support arranged on the advancing shell.