CN107294556A - Multifunctional interphone - Google Patents
Multifunctional interphone Download PDFInfo
- Publication number
- CN107294556A CN107294556A CN201710496407.1A CN201710496407A CN107294556A CN 107294556 A CN107294556 A CN 107294556A CN 201710496407 A CN201710496407 A CN 201710496407A CN 107294556 A CN107294556 A CN 107294556A
- Authority
- CN
- China
- Prior art keywords
- groove
- pull bar
- intercom
- telescoping tube
- expansion link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
- A45F5/00—Holders or carriers for hand articles; Holders or carriers for use while travelling or camping
- A45F5/02—Fastening articles to the garment
- A45F5/021—Fastening articles to the garment to the belt
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3888—Arrangements for carrying or protecting transceivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Details Of Aerials (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of multifunctional interphone, it is covered after intercom provided with expansion link, and outermost sub bar is embedded in the strip groove of intercom bonnet and end is fixed with drawing.It is respectively equipped with the both sides of the groove of bonnet in a groove parallel with it, two grooves and is placed with the first telescoping tube and the second telescoping tube respectively, the bandage that two telescoping tubes are taken across groove respectively is removably attached in groove；First telescoping tube two ends respectively can be with expansion link and the second expansion link releasable connection.Abreast provided with the storage line groove for depositing cable volume and microphone between the groove where the groove and expansion link where the first telescoping tube；Storage line groove is screwed with plug screw through the one end of bonnet away from antenna, and the notch of storage line groove is covered by strip of paper used for sealing；The surface on the signal column of intercom is provided with the wireless camera that can be matched with handheld terminal.The intercom can signal acquisition within a large range, function diversification carries easy to use, adaptability is extremely strong.
Description
Technical field
The invention belongs to intercom technical field, more particularly to it is a kind of can be with the intercom of adjustment length.
Background technology
Intercom is the conventional wireless near field communication equipment of daily production and living, in intercom in use, often
Intercom poor signal is run into, it is necessary to intercom be elevated into signal acquisition, or intercom is stretched out outside building, for example, stretch out
Somewhat spacious environment signal acquisition is waited outside window, especially in the wild either in pit-hole when, more need to lift intercom
Or reach at a certain position, it is good to capture signal, is loudly talked with.But current intercom when in use can only be according to
The position of intercom is adjusted with signal acquisition by the stretching, extension of human arm, and use is not only inconvenient, and the scope of its signal acquisition
It is extremely limited, in the wild or in deep-well, the performance of existing intercom is extremely limited, at all can not be at stake
Communication in time, its signal is often because blindage covers and can not capture.Again, due to remote when intercom is lifted
Human body, is likely to result in that call sound is smaller, and other side's even both sides' situation about all can not hear clearly occurs, and it is loud right now then to need
Words, use is extremely inconvenient.However, intercom is away from human body but is that one kind is effectively protected, it is well known that intercom is in call
When radiation it is very big, through being also a kind of infringement to body very close to human body especially head.Finally, due to which intercom is in signal acquisition
When away from human body head, therefore, during signal acquisition be whether the signal column of invisible intercom has signal, can only be by continuous
Ground calls out to determine whether signal, using also extremely not convenient.As can be seen here, current intercom structure function is all excessively single
One, the communication under general spacious environment is may be only available for, adaptability is weaker.
The content of the invention
It is an object of the invention to provide a kind of multifunctional interphone, the multifunctional interphone efficiently solves right at present
Say that machine function is single, inconvenient for use, bad adaptability technical problem.
Technical scheme is as follows：
A kind of multifunctional interphone, is covered after intercom provided with expansion link, length of the expansion link along intercom
Direction is set；Expansion link is made up of some sub bars being nested with one another, and the sub bar is made of pipe, positioned at outermost son
Bar is embedded in the strip groove of intercom bonnet, and the draw ring that annulus is made is fixed with the end of the sub bar of innermost layer, described recessed
Groove runs through the one end of bonnet away from antenna, to cause the extended groove of other sub bars in addition to outermost layer, the drawing
Ring is located at outside the groove；The draw ring is connected with one end of transition conduit, and the other end of transition conduit inserts the sub bar of innermost layer
End and with the end thread be socketed；
The both sides of the groove covered in the rear are respectively equipped with a groove parallel with it, two grooves is placed with respectively
One telescoping tube and the second telescoping tube, the bandage that two telescoping tubes are taken across groove respectively are removably attached in groove；Wherein,
The top of the outermost straton pipe of first telescoping tube can be inserted into the innermost layer sub bar terminus inner of expansion link and is socketed with its screw thread, the
The end of the sub- pipe of innermost layer of one telescoping tube can be inserted into inside the top of the outermost straton pipe of the second telescoping tube and with its thread bush
Connect；
The storage line groove of bar shaped, institute are abreast provided between the groove where the groove and expansion link where the first telescoping tube
State prolong in storage line groove its length direction provided with spiral helicine cable roll up, cable volume two ends respectively with the intercommunication inside intercom
Module is connected with mini microphone；The storage line groove runs through the one end of bonnet away from antenna, and through end is screwed with plug screw at this, storage
The notch of line groove is covered to prevent cable volume from dropping out by dismountable one piece of strip of paper used for sealing；
The surface on the signal column of the intercom is provided with micro radio camera, for the signal graph on signal acquisition column
Mark, the wireless camera is connected with intelligent hand-held terminal.
Further, nested two sub bars or two of each pair of the expansion link and the first telescoping tube and the second telescoping tube
Son pipe is respectively the first pull bar and the second pull bar, and the first drag link sleeve is on the second pull bar；In the outer wall both sides pair of the second pull bar
Ground is claimed to be fixed with some disc springs seat, the disc spring is just provided with the groove for installing disc spring to one end of the first pull bar inwall,
The extended groove notch of small end face of the disc spring is simultaneously fixed with ball on small end face；In the inwall both sides of the first pull bar
The chute of twice and the first pull bar diameter parallel is symmetrically provided with, is provided with the bottom land of the chute and some runs through the first pull bar bar
The perforation of wall；Pull second pull bar in the first pull bar during axially opposing slip, the ball is slided in the chute
And slipped into the presence of disc spring and stretch out the perforation, fix the first pull bar and the relative position of the second pull bar；When holding
When first pull bar outer wall dew is had ball at the position of ball by being threaded back through in hole, all balls, which slip away, perforates and can be again introduced into institute
State in chute.
Further, the inwall of the perforation is in circular arc, and its arch crown is towards the central shaft of the perforation.
Further, the perforation is less than positioned at one end of inwall positioned at one end of the first pull bar outer wall.
Further, it is fixed with the outermost sub bar for hanging over the clip on clothes.
Further, be equipped with can be with the transition conduit spiral shell for the terminus inner of the sub- pipe of the innermost layer of first and second telescoping tube
The internal thread of line socket.
Further, described bandage one end is fixed on a lateral edges of the groove, and the other end is bypassed after corresponding telescoping tube
Pass through VELCRO and bonnet releasable connection.
Further, the plug screw by iron chains bolt on intercom.
Further, the shrouding is the plastic plate of strip, and the plastic plate is located at storage line groove and is provided with through the surface at end
The flange vertical with plastic plate body phase.
Further, the shrouding is located at the screw thread of the side surface of storage line groove one and the storage line groove of corresponding position through end
The screw thread set on cell wall collectively forms a complete screwed hole, and the screwed hole is engaged with the plug screw.
Beneficial effects of the present invention：The present invention after intercom by covering setting strip groove/groove to be embedded in/is put into
Expansion link/telescoping tube, will not cause excessive influence to the profile of intercom, and the overall coordination still attractive in appearance of intercom is easy to carry,
When needing elongation, draw ring is hooked with finger expansion link is pulled to suitable length one and drawn, meanwhile, needing further to
When intercom is moved to position farther out, can by one of bonnet back either two telescoping tubes remove, connect into one it is longer
Extension bar, it is especially suitable to being strayed into the dell either more environment of the complicated blindage of environment, can be fully by intercom
Reception signal at unobstructed void spaces is moved to, normal intercom is carried out.As a result of Multi-section retractable extension bar,
Its adjustable-length scope is larger, and full retraction installs reset when not needing adjustment length.And specially set it is miniature
Microphone can realize remote sound transmission, it is to avoid user needs bigger sound to carry out intercommunication when expansion link extends, and need
Plug screw is turned on when wanting, it is that intercommunication can be achieved to pull out mini microphone.And the wireless camera set can enter to signal column
Row live signal is monitored, it is not necessary to which the position of signal can be captured by continually verifying whether intercom has arrived by sounding
Put, use and carry all extremely convenient, adaptability is extremely strong, there can be one very in the closing building of pit-hole or dtr signal
The ability of large-scale quick and precisely signal acquisition, the environment that is particularly suitable for use in is complicated, blindage blocks the more extreme environment of signal,
It is significant for exploration or some closed dell job spaces.
Brief description of the drawings
Fig. 1 is rearview of the invention.
Rearview when Fig. 2 extends after being connected as a single entity for the expansion link and two telescoping tubes of the present invention.
Fig. 3 is the attachment structure schematic diagram of two nested sub bars of expansion link.
Fig. 4 is sliding completely off sectional view during perforation for the ball in Fig. 3.
Fig. 5 is the cross-sectional view for crossing axis of perforating of the first pull bar.
Fig. 6 is B-B sectional views of structure shown in Fig. 5.
Fig. 7 is A-A sectional views in structure shown in Fig. 1.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
The invention will be further described with reference to the accompanying drawings and examples：
As shown in Fig. 1-2, a kind of intercom, provided with expansion link b, the expansion link b along right on the bonnet a of intercom
Say that the length direction of machine is set；Expansion link b is made up of some sub bars being nested with one another, and the sub bar is made of pipe, position
It is embedded in outermost sub bar 1 in intercom bonnet a strip groove, outermost sub bar 1 can be removable in groove herein
Connection, is fixed in groove for example with plastics anchor ear；The bottom land of groove can certainly be directly bonded to.In innermost layer
The end of sub bar 2 be fixed with the draw ring 3 that annulus is made, the groove runs through the one end of bonnet a away from antenna d, to remove
Other sub bars outside outermost layer can stretch out the groove in stretching, and the draw ring 3 is located at outside the groove, so as to hand
Finger is stretched after hooking.The draw ring 3 is connected with one end of one section of very short transition conduit 13, the other end insertion of transition conduit 13
The end of the sub bar 2 of innermost layer is simultaneously socketed with the end thread of the sub bar 2, when needed to pull down draw ring 3.
The both sides of lid a groove are respectively equipped with a groove parallel with it, two grooves in the rear is placed with respectively
First telescoping tube 11 and the second telescoping tube 12, the bandage 14 that two telescoping tubes are taken across groove respectively are removably attached to groove
It is interior.Wherein, the top of the outermost straton pipe 1101 of the first telescoping tube 11 can be inserted into the expansion link b terminus inner of innermost layer sub bar 2
And be socketed with its screw thread, the end of the sub- pipe 1102 of innermost layer of the first telescoping tube 11 can be inserted into the outermost straton of the second telescoping tube 12
It is socketed, is stretched with alloing two telescoping tubes to constitute one with expansion link b and lengthen inside the top of pipe 1201 and with its screw thread
Rod member, with bigger elongation.In the present embodiment, for expansion link b and the first telescoping tube 11 and the second telescoping tube 12
Tensile maximum length value, can change the length and thickness of every knot bar (sub- pipe) as needed to realize, many knots
Bar (sub- pipe) can increase elongation total amount, and reduce thickness is conducive to a few knot bars of multinest (sub- pipe), can also increase elongation.
Expansion link b and the first telescoping tube 11 and the telescopic shaft that the second telescoping tube 12 can be similar umbrella used in the present embodiment,
Can be that the structure type of such as flexible fishing rod etc is improved.
The storage line of bar shaped is abreast provided between the groove where the groove and expansion link b where the first telescoping tube 11
Prolong in groove, the storage line groove its length direction provided with spiral helicine cable volume 18, cable volume 18 two ends respectively with intercom
Internal intercommunication module (or intercom module (English name FRS PMR module), refer to that the core for intercom is integrated
Circuit, is the most important electronic component for realizing intercom intercommunication function, and what is herein referred to is mainly and the transaudient respective element that communicates
Part) it is connected with mini microphone 19；The connection of intercommunication module and mini microphone 19 can be easily for those skilled in the art
Realize, it is also the conventional technological means in the communications field that it, which is connected, its specific connection is not repeated herein；And mini microphone 19 can
Directly using the small microphone of current drops visible on the market.The speaker sound of usual intercom is larger, therefore farther out
Distance still can not heard, still, and the microphone of intercom itself but relatively interior at a distance again can not receive acoustic information well,
Therefore external microphone is simply provided with herein.If necessary can certainly an external earphone, and mini microphone simultaneously
Wireless type can be used with earphone.The storage line groove runs through the one end of bonnet a away from antenna d, and through end is screwed with spiral shell at this
Plug 16, the notch of storage line groove is covered to prevent cable rolls up 18 from dropping out by dismountable one piece of strip of paper used for sealing 20；Strip of paper used for sealing 20 is used herein
Storage line groove is covered, is to roll up 18 for the ease of changing maintenance cable without storage line groove directly is made into a cylindrical hole.
The surface on the signal column of the intercom is provided with micro radio camera (not shown), for signal acquisition
Signal icon on column, the wireless camera is connected with intelligent hand-held terminal (handheld device of such as mobile phone etc).It is above-mentioned
Wireless camera can be fixed using Universal flexible shaft, and sucker is provided with Universal flexible shaft bottom, and the sucker can be adsorbed in intercom
On shell, so as to be removably disposed wireless camera, for monitoring signal column, intercom signal when knowing signal acquisition is strong
Degree.
Further, as shown in Fig. 3-4, the two knot bars that are nested with one another of the expansion link b are respectively the He of the first pull bar 4
Second pull bar 5, the first pull bar 4 is enclosed on the upper part of the second pull bar 5, and the lower end of the second pull bar 5 is enclosed on the thread segment on the top of column 2；
Symmetrically be fixed with some disc springs seat 6 in the outer wall both sides of the second pull bar 5, the disc spring seat 6 just to the inwall of the first pull bar 4 one
End is provided with the groove for installing disc spring 7, and the extended groove notch of small end face of the disc spring 7 is simultaneously fixed on small end face
There is ball 8.The chute 401 of twice and the diameter parallel of the first pull bar 4 is symmetrically provided with the inwall both sides of the first pull bar 4,
The bottom land of the chute 401 is provided with some perforation 402 for running through the bar wall of the first pull bar 4；Second pull bar 5 is pulled to be drawn first
In bar 4 during axially opposing slip, the ball 8 slides in the chute 401 and is slipped into the presence of disc spring 6 and stretch out institute
Perforation 402 is stated, the part of ball 8 is exposed the outside of the first pull bar 4 and blocked, and consolidates the relative position of the first pull bar 4 and the second pull bar 5
It is fixed, so that it is determined that expansion link b length.When hold the outer wall of the first pull bar 4 dew have at the position of ball 8 and by ball 8 by
When being threaded back through in hole 402, the perforation of slipping away of all balls 8 402 and is again introduced into the chute 401 under the push-and-pull of external force, makes the
Two pull bars 5 can be slided in the first pull bar 4 again, to slide to next perforation 402, so as to reach adjustable telescopic rod b length
Purpose.For the ease of pressing ball 8, can also prepare a soft rubber set 10 is used to be enclosed on stretching for expansion link b when in use
Go out part, rubber sleeve 10 can be usually placed in pocket by convenient pressing ball 8.
When making, it should be noted that the coefficient of elasticity of selection disc spring 7, it is allowed to match with the physical dimension of pull bar and ball 8,
It can specifically be drawn, or calculated according to many experiments, explanation is not expanded on further in theoretical calculation herein.This kind is stretched
Contracting bar b structure is more stable and firm, and the elastic life-span of disc spring and intensity are preferable, can be lifted expansion link b reliability and
Service life.
Herein it should be noted that, the first telescoping tube 11 and the second telescoping tube 12 in the present embodiment can also be stretched using above-mentioned
Contracting bar b structure.
Further, as shown in Fig. 5-6, the inwall of the perforation 402 is worn in circular arc, and its arch crown towards described
The central shaft in hole 402, so that ball 8 can successfully slide in and out.
Further, as shown in Fig. 5-6, one end that the perforation 402 is located at the outer wall of the first pull bar 4 is less than position in the inner
One end of wall, can not only slide in and out in order to ball 8, can also effectively prevent ball 8 from skidding off perforation 402, relative to ball 8 according to
For the connection limitation of disc spring 7, its structure is more reliable.
Further, as shown in figure 1, being fixed with the outermost sub bar 1 for hanging over the clip c on clothes, with
Just intercom is clipped on clothes or not on waistband, can be by clip c plastic injection in outermost son when making
On bar 1, or whole expansion link b all adopts made of plastic, and clip c is integrally formed with expansion link b.
Further, be equipped with can be with the transition conduit 13 for the terminus inner of the sub- pipe of the innermost layer of first and second telescoping tube
The internal thread of screw thread socket, so as to which every telescoping tube is stretched next.
Further, described one end of bandage 14 is fixed on a lateral edges of the groove, and the other end bypasses corresponding flexible
Manage after (the first telescoping tube 11 or the second telescoping tube 12) by VELCRO 15 and bonnet a releasable connections, can also use certainly
The connectors such as snap-fastener.
Further, as shown in figure 1, the plug screw 16 by the bolt of iron chains 17 on intercom, to prevent plug screw 16 from losing.
Further, as shown in fig. 7, the shrouding 20 is the plastic plate of strip, the plastic plate runs through positioned at storage line groove
The surface at end is provided with the flange 201 vertical with plastic plate body phase, and shrouding 20 is pulled out or inserted so that finger hooks the flange 201
Enter.
Further, the shrouding 20 is located at the screw thread of the side surface of storage line groove one and the storage line groove of corresponding position through end
Cell wall on the screw thread that sets collectively form a complete screwed hole, the screwed hole is engaged with the plug screw 16.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of multifunctional interphone, it is characterised in that：Covered after intercom provided with expansion link, the expansion link is along intercommunication
The length direction of machine is set；Expansion link is made up of some sub bars being nested with one another, and the sub bar is made of pipe, positioned at most
The sub bar of outer layer is fixed and is embedded in the strip groove of intercom bonnet, is fixed with what annulus was made in the end of the sub bar of innermost layer
Draw ring, the groove runs through the one end of bonnet away from antenna, to cause other sub bars in addition to outermost layer extended described
Groove, the draw ring is located at outside the groove；The draw ring is connected with one end of transition conduit, and the other end insertion of transition conduit is most
The end of the sub bar of internal layer is simultaneously socketed with the end thread；
The both sides of the groove covered in the rear are respectively equipped with to be placed with first in a groove parallel with it, two grooves and stretches respectively
The draw and the second telescoping tube, the bandage that two telescoping tubes are taken across groove respectively are removably attached in groove；Wherein, first
The top of the outermost straton pipe of telescoping tube can be inserted into the innermost layer sub bar terminus inner of expansion link and is socketed with its screw thread, and first stretches
The end of the sub- pipe of innermost layer of the draw can be inserted into inside the top of the outermost straton pipe of the second telescoping tube and is socketed with its screw thread；
The storage line groove of bar shaped, the storage are abreast provided between the groove where the groove and expansion link where the first telescoping tube
Prolong in wire casing its length direction provided with spiral helicine cable roll up, cable volume two ends respectively with the intercommunication module inside intercom
It is connected with mini microphone；The storage line groove runs through the one end of bonnet away from antenna, and through end is screwed with plug screw at this, and storage line is recessed
The notch of groove is covered to prevent cable volume from dropping out by dismountable one piece of strip of paper used for sealing；
The surface on the signal column of the intercom is provided with micro radio camera, the signal icon on signal acquisition column,
The wireless camera is connected with intelligent hand-held terminal.
2. multifunctional interphone according to claim 1, it is characterised in that：The expansion link and the first telescoping tube and second
It is respectively the first pull bar and the second pull bar that two nested sub bars of each pair of telescoping tube or two sons, which are managed, and the first drag link sleeve is second
On pull bar；Some disc spring seats are symmetrically fixed with the outer wall both sides of the second pull bar, the disc spring seat is just to the first pull bar inwall
One end be provided with groove for installing disc spring, the extended groove notch of small end face of the disc spring is simultaneously solid on small end face
Surely there is ball；The chute of twice and the first pull bar diameter parallel is symmetrically provided with the inwall both sides of the first pull bar, in the cunning
The bottom land of groove is provided with some perforation for running through the first pull bar bar wall；Pull second pull bar axially opposing cunning in the first pull bar
When dynamic, the ball slides in the chute and is slipped into the presence of disc spring and stretch out the perforation, make the first pull bar with
The relative position of second pull bar is fixed；When hold the first pull bar outer wall dew have ball at the position of ball by being threaded back through in hole when,
All balls, which slip away, to be perforated and can be again introduced into the chute.
3. multifunctional interphone according to claim 2, it is characterised in that：The inwall of the perforation is in circular arc, and its arc
Central shaft of the shape vault towards the perforation.
4. multifunctional interphone according to claim 3, it is characterised in that：The perforation is positioned at one end of the first pull bar outer wall
Less than positioned at one end of inwall.
5. multifunctional interphone according to claim 1, it is characterised in that：It is fixed with the outermost sub bar for hanging
Clip on clothes.
6. multifunctional interphone according to claim 1, it is characterised in that：The end of the sub- pipe of innermost layer of first and second telescoping tube
End is internal to be equipped with the internal thread that can be socketed with the transition conduit screw thread.
7. multifunctional interphone according to claim 6, it is characterised in that：Described bandage one end is fixed on the one of the groove
Lateral edges, the other end is bypassed after corresponding telescoping tube by VELCRO and bonnet releasable connection.
8. multifunctional interphone according to claim 1, it is characterised in that：The plug screw is by iron chains bolt on intercom.
9. multifunctional interphone according to claim 8, it is characterised in that：The shrouding is the plastic plate of strip, the modeling
Flitch is located at storage line groove and is provided with the flange vertical with plastic plate body phase through the surface at end.
10. multifunctional interphone according to claim 9, it is characterised in that：The shrouding is located at the side surface of storage line groove one
The screw thread that screw thread and the storage line groove of corresponding position are set on the cell wall at end collectively forms a complete screwed hole, described
Screwed hole is engaged with the plug screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710496407.1A CN107294556B (en) | 2017-06-26 | 2017-06-26 | Multifunctional interphone |
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|---|---|---|---|
| CN201710496407.1A CN107294556B (en) | 2017-06-26 | 2017-06-26 | Multifunctional interphone |
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| CN107294556A true CN107294556A (en) | 2017-10-24 |
| CN107294556B CN107294556B (en) | 2022-12-23 |
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