CN201639259U - Lightning protection automatic switch for satellite television receiver - Google Patents
Lightning protection automatic switch for satellite television receiver Download PDFInfo
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- CN201639259U CN201639259U CN201020166229XU CN201020166229U CN201639259U CN 201639259 U CN201639259 U CN 201639259U CN 201020166229X U CN201020166229X U CN 201020166229XU CN 201020166229 U CN201020166229 U CN 201020166229U CN 201639259 U CN201639259 U CN 201639259U
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Abstract
The utility model relates to a lightning protection automatic switch for a satellite television receiver, which comprises a shell. An external terminal for connecting an external cable is respectively arranged at both ends of the shell. An on-off interface is arranged at the other end of the external terminal at one side, and an internal cable is connected to the other end of the external terminal at the other side. A rail component is arranged in the shell. A driving mechanism is arranged on the rail component, and is connected with the external terminal at the other side through the internal cable. A control circuit board and a motor controlled by the control circuit board are arranged on the driving mechanism. A contact matched with the on-off interface is arranged at one end of the driving mechanism. The lightning protection automatic switch enables lightning overvoltage and lightning current not to infringe on the satellite television receiver and connection equipment thereof when a satellite antenna is stoked by lightning, and solves the problems in the prior art that the lightning protection effect is bad, and plugs need to be plugged every time thereby easily making personal injuries.
Description
Technical field
The utility model relates to a kind of lightning protection device, relate in particular to a kind of can auto switching, be used for the lightning protection automatic switch on the satellite television receiver.
Background technology
Directly arrive the satellite television receiving system of family (DTH), need an outdoor satellite earth antenna and tuner receiving satellite signal, by cable signal is delivered to indoor satellite television receiver again.Outdoor satellite earth antenna for reaching good reception, often is contained in eminence, as roof, pillar top, or spacious explicit place.The object that this makes satellite earth antenna become to be subject to be struck by lightning.In case be struck by lightning, Lightning Over-voltage and lightning current will not only may destroy receiver and other electric equipments that is attached thereto by in the cable inlet chamber, but also fire hazard and personal injury.Directly arrive the universal day by day of family satellite television receiving system, its lightning protection becomes the problem that becomes more and more important.As Chinese patent: " satellite TV ground receiving station power supply automatic control equipment (CN2332113Y) ", form by shell and circuit board, three operating state indication luminous tubes are arranged on the panel of shell, wiring of input power source end and power supply outlet terminal and manual or automatic selector switch are arranged on the backboard of shell.
Use the method for ground connection to come lightning protection traditionally, with ground connection before antenna body and cable are in inlet chamber, can when being subjected to direct lightning strike or induction thunder electric current be introduced the earth, over-voltage weakens or eliminates thunderbolt loss.Because grounding requirement varies in the reality, impedance ground can not reach ideal value, and the existence of multipoint earthing situation, makes when being struck by lightning, and earth potential is increased to occurs dangerous potential difference between dangerous values or the different earth point.Only often still can not eliminate lightning damage with grounding measures.Using surge protector (SPD) is another kind of traditional lightening arresting method; in satellite receiving system; it is connected in parallel between cable core and the screen usually; when overvoltage occurring between the outer shielding layer of cable core and ground connection; the SPD conducting; ground is gone in the surge current bypass, limited the overvoltage between heart yearn and the ground wire.SPD must use with grounding measures.SPD is only for the overvoltage between coremaking line and the ground wire, and restrictedly current potential raises.As Chinese patent: " signal lighting protection type auto reclosing switch (CN201015166Y) "; its detecting unit is connected on after the power circuit input; the line status detecting unit is connected before the line output; the real-time status of the real-time status of input circuit and output circuit is sent to processor unit; this switch also is provided with the signal lighting protection module, and overcurrent protector is connected on the holding wire between input and output.
Above-mentioned traditional lightening arresting method has certain effect to preventing or reducing the thunderbolt loss, but still can not eliminate thunderbolt harm fully.In fact another effective method is the intrusion path that cuts off lightning overvoltage and lightning current, make protected equipment and the object that may be struck by lightning between the High-Voltage Insulation measure is arranged.For satellite television receiving system, be exactly to finish watching behind the TV to pull out from the cable plug that outdoor satellite earth antenna is linked satellite television receiver at every turn, even antenna is struck by lightning like this, also not entail dangers to receiver and other equipment that links to each other.But few people do like this in the reality, will pull out plug because finish watching TV at every turn, plug in again before seeing at every turn, and are so very inconvenient.Only pulling out plug before thunder and lightning weather is arranged can save trouble, and but will pay close attention to weather forecast constantly, still inconvenient.And when thunder and lightning weather takes place, can not remove unplugg, the people is struck by lightning.
Summary of the invention
The utility model provides on a kind of cable that is serially connected between satellite earth antenna and the satellite television receiver, make satellite antenna when being struck by lightning, Lightning Over-voltage and lightning current can not be encroached on receiver and associated devices thereof, need not manually plug the lightning protection automatic switch of long service life; It is bad to have solved the lightning protection effect that exists in the prior art, all needs to plug plug at every turn, causes the technical problem of personal injury easily.
The utility model also provides a kind of volume little simultaneously, cost is low, power consumption is low, break distance can design longlyer on demand, contact is the radio-frequency (RF) coaxial structure, be suitable for break-make radiofrequency signal and DC power supply, fully automatic working need not the lightning protection automatic switch that is used for satellite television receiver of manual intervention; It is big to solve the electric switch volume that exists in the prior art, the cost height, and the non-coaxial configuration of contact is not suitable for the technical problem of satellite television receiver lightning protection.
Above-mentioned technical problem of the present utility model solves by following technical proposals: a kind of lightning protection automatic switch that is used for satellite television receiver, it is characterized in that: comprise housing, respectively be provided with an external termination that connects external cable at the two ends of housing, wherein the other end of the external termination of a side is provided with the break-make interface, and wherein the other end of the external termination of opposite side is connected with inside cable; In housing, be provided with guide assembly, on described guide assembly, driving mechanism is installed, driving mechanism links to each other with the external termination of opposite side by inside cable, on described driving mechanism, be provided with control circuit board and by the motor of control circuit board control, the contact that is used with the break-make interface be installed at an end of driving mechanism.The break-make interface is linked tuner on the satellite earth antenna by external termination by cable, and contact is linked satellite television receiver by cable.It is shape of threads that external termination is positioned at the outer part of housing, external cable, the other end that external termination is positioned at housing connects different members respectively, the external termination in left side is internally connected with the break-make interface, the inside, external termination on right side is connecting inside cable, and the break-make interface is improved threadless straight cutting F type radio frequency connector female, comprises core needle guide body and outer shielding layer conductor, contact is the F type radio frequency connector male of direct plugging-in, and both are just in time adaptive.During use, the external termination of both sides can connect cable by F type radio frequency connector male, is connected on the tuner and receiver on the satellite earth antenna.Contact is fixed on the driving mechanism, and driving mechanism drives contact, realizes switching on and off between contact and the break-make interface.It is open state or shutdown or holding state that control circuit detects receiver, and then goes to controlling and driving mechanism, realizes being switched on or switched off between break-make interface and the contact.Power supply is given control circuit and driving mechanism power supply.Housing is used to install break-make interface and contact, driving mechanism, control circuit and power supply.Mechanism connects or disconnects by the circuit board controlling and driving, need not artificial interference, realized between outdoor satellite earth antenna and the indoor satellite receiver automatic disconnection be connected.If the thunder and lightning omen appears in the user when watching satellite television; can receiver be placed holding state with remote controller; automatic switch has just disconnected like this; when being struck by lightning, antenna can stop the invasion of lightning overvoltage and lightning current; the equipment of not only having protected receiver and being attached thereto also can further prevent fire and personal injury accident.
As preferably, the ultimate range of the relative motion between described break-make interface and the contact that is mated is that the ultimate range of 5cm～100cm when just disconnecting between break-make interface and the contact is 5cm～100cm.Common electric switch, the distance after it cut-offs are for guaranteeing under the electric pressure of being worked, and considering after overvoltage and the coefficient of safety still can deenergization, and it is very short to work in the separated distance of its contact of switch of low pressure, only several millimeters, can not be used for the lightning protection purpose.Though the high-voltage switch gear break distance is long, costs an arm and a leg, and is bulky, is only applicable to high-voltage fence.Isolating switch that field of power is generally used or isolation switch, purpose is for guarantee the person and device security after disconnection, the cut-off point that obvious and enough distances must be arranged after the disconnection, though they have very long break distance when disconnecting, though but the type of dependent manual operation is simple in structure in this class isolating switch, though cost is low, can not work automatically, power consumption is big during action; Electrically operated type cost is very high, and volume is big, and weight is big.More than several switches all be used for break-make low frequency or DC power supply, only be operated in direct current tremendously low frequency scope, can not be used for radiofrequency signal.In a word, existing switch does not still have and is applicable to that the satellite television receiver lightning protection is isolated, can make to disconnect to keep enough insulation distances between latter two cut-off point, make when satellite antenna is struck by lightning that Lightning Over-voltage and lightning current can not be encroached on receiver and associated devices thereof.
As preferably, described housing is to be connected and composed by front side cap and rear side cover, and described guide assembly is to be made of two groups of guide rails that are parallel to each other and be positioned on the same horizontal plane, and wherein one group of guide rail is located at the front side cap inwall, and another group guide rail is located at the rear side cover inwall.Guide rail is positioned at the both sides of driving mechanism, and guide effect is better, and guide rail and side cover are one-body molded.
As preferably, described guide rail comprises gathering sill and is positioned at the tooth bar of gathering sill below, the side that described driving mechanism is relative with guide rail is provided with the projection that matches with gathering sill, be provided with the gear that matches with tooth bar below projection, described gear is connected on the motor of driving mechanism inside by gear box.Motor-driven gear rotates, because wheel and rack cooperates, makes and moves before and after driving mechanism is on tooth bar, thereby make contact insert break-make interface or disengaging and away from the break-make interface.The projection of driving mechanism side is moved in gathering sill, plays the effect of guiding.
As preferably, described driving mechanism comprises supporting surface, four angles at supporting surface respectively are provided with a projection that cooperates with guide assembly, contact is installed above supporting surface, the both sides of contact respectively are provided with a super capacitor, respectively be provided with a switch in the both sides of electric capacity, described switch is fixed on the circuit board of contact top, respectively is provided with a triggering projection that is used for trigger switch at the two ends of described housing; Be fixed with motor below supporting surface, motor output shaft is connecting the gear that cooperates with guide assembly by gear box.The setting of super capacitor is for after shutdown or standby, when receiver is no longer powered, because non-transformer in the cable, and control circuit and driving mechanism still need the power supply of a period of time to go to finish contact is broken away from the break-make interface and away from the task of break-make interface, this moment, power supply was supplied with by super capacitor.Trigger the protruding two ends that are arranged on housing, when driving mechanism moved to desired location in housing, the triggering protrusions press of an end was to one of them switch triggering reed, thus the stall of control motor.
As preferably, an end of described contact links to each other with inside cable, and the other end of contact is provided with the core pin and is positioned at the outer external shield of core pin, and the middle part of core pin picks out pin, and pin links to each other with described circuit board; Be provided with core needle guide body and outer shielding layer conductor in the described break-make interface.The design of contact and break-make interface in the time of should making each insertion, is contact earlier between the outer shielding layer conductor, is only the connection between the core pin then, and when each the disconnection, is that the core pin separates earlier, is only outer shield conductor then and separates.The earth potential unanimity of switch both sides be can when contact of core pin or separation, make like this, potential difference or electrostatic damage tuner or receiver on the core pin prevented.
As preferably, described control circuit comprises soft startup of electric power unit and motor operation unit, and described motor operation unit comprises monitoring modular, and described monitoring modular is connecting motor drive module.Be connected by semiconductor switch between described contact and the described inside cable.Linking between contact and the break-make interface is the mechanical switch action, the action of mechanical switch is often with shake, can cause external termination and the cable that is attached thereto and the first-class subsequent parts of high frequency to occur pulse train on the moment power line being powered up by contact, and vibration and overvoltage may appear, might cause damage to circuit such as tuner and receivers like this, for avoiding this problem, can change the heat of the above-mentioned mechanical switch process of inserting into cold slotting process, utilize semiconductor switch being connected of metal-oxide-semiconductor and electric capacity just, realize the cold plug between contact and be connected the soft startup of electric power of the parts after the contact.
As preferably, above housing that front side cap and rear side cover constitute, be provided with transparent loam cake, described front side cap, rear side cover and loam cake adopt the plastic material of insulation to make.Front side cap and the joint that again loam cake is fastened on both after rear side cover is connected by bolt, adopt the plastic material of insulation to make insulation effect good, guarantee validity to lightning protection, loam cake manufactures transparent simultaneously, can after satellite television receiver shutdown or standby, make the user can see intuitively whether the break-make interface has separated and kept enough spacings with contact.
As preferably, described inside cable is a spirality.Spiral cable can freely stretch, and allows the driving mechanism motion more freely.
Therefore, a kind of lightning protection automatic switch that is used for satellite television receiver of the present utility model possesses following advantage: 1, utilize control circuit controlling and driving mechanism to move back and forth on guide assembly, switch on and off being connected between satellite earth antenna and the satellite television receiver thereby finish, realize control automatically, prevent thunderbolt; 2, enough insulation distances are set between break-make interface and contact, thereby it is high voltage withstanding to make switch of the present utility model to realize, when satellite antenna is struck by lightning, can stops the invasion of lightning overvoltage and lightning current; 3, adopt semiconductor switch to connect between contact and the inside cable, when start, realize that cold between break-make interface and contact inserted and to being connected the parts soft startup of electric power after the break-make interface, avoided powering up the infringement that moment may cause parts such as tuner and receivers, the good long service life of fail safe; 4, the contact contact time be first external shielding body be then core at connecing, prevented potential difference or static damage tuner or receiver circuit on the core pin; 5, loam cake is transparent convenient break-make situation of observing switch inside, guarantees the validity of switch to lightning protection.
This technical scheme realized between outdoor satellite earth antenna and the indoor satellite receiver automatic disconnection be connected, need not manual intervention.When receiver was started shooting, this automatic switch was connected automatically, did not influence the user and watched satellite television programming; The user during with receiver shutdown or standby; this switch automatic disconnection; and make the enough insulation distances of maintenance between contact and the break-make interface; usually at tens to tens centimetres; this distance can be high voltage withstanding; thereby when satellite antenna is struck by lightning, stop the invasion of lightning overvoltage and lightning current, not only protected receiver and other to be attached thereto equipment, also can prevent further rie and personal injury accident.
The time average of seeing TV according to the general population calculated less than 4 hours every day, satellite television receiver was started shooting 4 hours every day, shutdown in 20 hours or standby are then on average arranged, after this automatic switch is installed, promptly there are 20 hours automatic switches to disconnect, the cable plug that is equivalent to junction chamber outside antenna on the receiver pulls out, and compares when this automatic switch is not installed, and the probability that the equipment that receiver and other can be attached thereto is struck by lightning reduces (20/24) promptly 83%.As for 4 hours available machine time, usually thunder and lightning is premonitory, if occur the thunder and lightning omen near when the user is watching satellite television, can receiver be placed holding state with remote controller, automatic switch has just disconnected like this, also played the lightning protection effect, and the artificial unplugg that need not to brave dangers.Therefore, automatic switch is arranged after, can eliminate basically by satellite television receiving antenna and on cable invade receiver and other are attached thereto the lightning risk of equipment.If before being installed in this switch in the cable inlet chamber, then can prevent to be incorporated into indoor lightning risk by outdoor satellite earth antenna and cable.
Description of drawings
Fig. 1 is the decomposing schematic representation that is used for the lightning protection automatic switch of satellite television receiver of the present utility model.
Fig. 2 is the schematic internal view of the contact in Fig. 1.
Fig. 3 is the schematic internal view of the front side cap in Fig. 1.
Fig. 4 is the front perspective view of the driving mechanism in Fig. 1.
Fig. 5 is the rear perspective view of the driving mechanism in Fig. 1.
Fig. 6 is the control circuit figure that is used for the lightning protection automatic switch of satellite television receiver of the present utility model.
Fig. 7 is the soft startup circuit for power supply figure that is used for the lightning protection automatic switch of satellite television receiver of the present utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical scheme of utility model is described in further detail.
Embodiment: as shown in figs. 1 and 3, a kind of lightning protection automatic switch that is used for satellite television receiver, comprise housing, housing comprises front side cap 1 and rear side cover 2, on the end face of front side cap 1 and rear side cover 2, respectively offer four bolts hole 3, bolt hole 3 is positioned on four angles of end face, front side cap 1 is with after rear side cover 2 is connected by bolt, leave in the top and have rectangular through hole altogether, transparent loam cake 4 on fastening in through hole, loam cake 4, front side cap 1 and rear side cover 2 all adopt the plastic material of good insulating to make.An external termination 5 respectively is installed at the two ends of housing, external termination 5 is a F type radio frequency connector female, external termination 5 is installed in front side cap 1 and rear side cover 2 joints, two external terminations 5 are exposed at the outer part of housing and are shape of threads, come external cable by F type radio frequency connector male, the external termination 5 in left side is connected to the tuner on the satellite earth antenna, and the external termination 5 on right side is connected to satellite television receiver.The end that the external termination on right side is positioned at housing is connected with spiral helicine inside cable 6, be connected with driving mechanism on the inside cable 6, the end that the external termination in left side is positioned at housing is provided with the break-make interface 7 of straight cutting, and break-make interface 7 comprises the outer shielding layer conductor that is positioned at inner core needle guide body and is positioned at core needle guide external body.
Shown in Figure 4 and 5, driving mechanism 23 comprises a supporting surface 8, and supporting surface 8 tops are provided with control circuit board 9, and control circuit comprises soft startup of electric power unit and motor operation unit, motor operation unit comprises monitoring modular, and monitoring modular is connecting motor drive module.Supporting surface 8 belows are provided with drive motors, and motor is connected with gear 10 by reduction box, and gear 10 is positioned at reduction box 11 outsides.Respectively be provided with at four angles of supporting surface 8 12, four projectioies 12 of a projection be positioned on the same horizontal plane and size shape identical, gear 10 is positioned at projection 12 below.Upper fixed at supporting surface 8 has a contact 13, contact 13 can be realized being connected or disconnecting with break-make interface 7, contact 13 is designed to the F type radio frequency connector male of direct plugging-in, comprise core pin 14 and outer shield conductor 15, on core pin 14, pick out a pin 16(who is used to connect control circuit as shown in Figure 2).The design of contact 13 and break-make interface 7 in the time of should making each insertion, is contact earlier between the outer shield conductor, is only then between the core pin and connects, and when each the disconnection, be that the core pin separates earlier, is only outer shield conductor then and separates.Make switch both sides earth potential unanimity in the time of can or separating in core pin contact like this, prevent the potential difference on the core pin or the circuit of electrostatic damage tuner or receiver.The both sides of contact 13 respectively are provided with an electric capacity 17, respectively are provided with a switch in the both sides of electric capacity 17, the triggering reed of inner switch 18 and the triggering reed of outer switch 19 towards opposite, inner switch 18 and outer switch 19 all are fixed on the circuit board.
Be equipped with guide assembly on the inwall of front side cap 1 and rear side cover 2, two groups of guide assemblies are parallel to each other and are in the same plane.Guide assembly comprises gathering sill 20 and is positioned at gathering sill 20 belows and the tooth bar 21 parallel with gathering sill 20, above the left part of rear side cover 2 gathering sill 20, be provided with one and trigger projection 22, above the right part of front side cap 1 gathering sill 20, also be provided with one and trigger projection 22.The projection 12 at four angles on the driving mechanism supporting surface imports in the gathering sill 20,10 rotations of drive motors driven gear, and gear 10 and tooth bar 21 engagements move on guide assembly thereby drive driving mechanism 23.The rear motor stall of colliding of the triggering projection 22 of the triggering reed of driving mechanism 23 inner switch 18 and the left end of rear side cover 2, the triggering projection 22 of the right-hand member of the triggering reed of driving mechanism outer switch 19 and the front side cap 1 also stall of rear motor of colliding in like manner.
In actual the use, by selecting the length of suitable front side cap 1 and rear side cover 2, air gap distance in the time of just can making disconnection between contact 13 and the break-make interface 7 satisfies the requirement of required withstand voltage, adopt 16cm in the present embodiment, between the two ultimate range was 16cm after promptly contact and break-make interface disconnected.Approximately can bear the following negative polarity of 150kV thunderbolt pulse, then under the situation that this automatic switch disconnects, the Lightning Over-voltage that is lower than 150kV just can not be crossed over the air gap between contact, thereby has protected the later equipment of contact that is connected in.
During start, receiver is powered to tuner, also can power to control circuit, makes control circuit and driving mechanism finish the task of contact 13 being inserted break-make interface 7.After shutdown or the standby, receiver is no longer powered, non-transformer in the cable, and control circuit and driving mechanism still need the power supply of a period of time to go to finish contact 13 is broken away from break-make interfaces 7 and away from the task of break-make interface 7, this moment, power supply was provided by super capacitor C1.Super capacitor C1 is in series by the super capacitor 17 of 2 2.7V/1F in the present embodiment.During the receiver start, integrated regulator U2 output is through diode D5, and 5 couples of super capacitor C1 of resistance R charge.Usually start just can make after tens seconds and be filled with enough electric weight among the super capacitor C1.After the receiver shutdown, the electric weight among the super capacitor C1 can be kept control circuit and motor M 1 work tens of seconds, control circuit and driving mechanism is finished contact 13 broken away from break-make interfaces 7 and away from the task of break-make interface 7.So in the present embodiment, power supply is made up of power supply in the receiver and super capacitor C1.
Inverter U1A, the power supply of U1B is obtained at node V1 place.
During the receiver start, triode Q1, the Q4 conducting is just being changeed motor M 1, when driving mechanism 23 has arrived the position that makes contact 13 insertion break-make interfaces 7, triggering on the rear side cover 2 projection 22 compressing inner switch 18(are switch S 1 among Fig. 6) on the triggering reed, make inner switch 18 ground connection, thereby triode Q4 is ended, motor M 1 stall.After the receiver shutdown, triode Q3, the Q2 conducting makes motor M 1 counter-rotating, when driving mechanism makes contact 13 break away from break-make interface 7 and reaches highest distance position, triggering on the front side cap 1 projection 22 compressing outer switch 19(are switch S 2 among Fig. 6) on the triggering reed, make outer switch 19 ground connection, thereby triode Q2 is ended, motor M 1 stall.
During start, the required operating current of this automatic switch comprises the electric current of control circuit, motor M1 and the electric current that charges to super capacitor C1, and total current is less than 500mA.Treat that contact puts in place, motor M 1 stall, after super capacitor C1 was full of electricity substantially, this moment, automatic switch wastage in bulk or weight electric current was reduced to about 10mA.
When contact 13 when break-make interface 7 moves and inserts break-make interface 7,15 of the core pin 14 of contact 13 and outer shield conductor have had the power supply that receiver provides, contact 13 is with after break-make interface 7 contacts, power supply can be added to suddenly on external termination 5 and cable that is attached thereto and the first-class subsequent parts of high frequency, this is that so-called charged heat is inserted.The plug of contact 13 and break-make interface 7 is actually the action of a mechanical switch, the action of mechanical switch is often with shake, can cause external termination 5 and the cable that is attached thereto and the first-class subsequent parts of high frequency to occur pulse train on the moment power line being powered up by contact, and vibration and overvoltage may appear, might cause damage to circuit such as tuner and receivers like this.For avoiding this problem, the heat of above-mentioned pure mechanical switch can be inserted process improvement be cold slotting process, realizes soft start to the power supply of external termination and cable that is attached thereto and the first-class subsequent parts of high frequency by semiconductor switch.Its implementation as shown in Figure 7.
Node P2 is connected with contact 13 core pins 14 among Fig. 7, and node P3 is connected with inside cable 6, is connected to metal-oxide-semiconductor Q5 and capacitor C 6 between node P2 and P3.As seen inside cable 6 no longer directly is connected with contact 13, but is metal-oxide-semiconductor Q5 and capacitor C 6 by a semiconductor switch.Node P1 is connected with node P1 among Fig. 6, is the control circuit power supply.Node V1 is connected with node V1 among Fig. 6.Node P4 is connected with node P4 among Fig. 6.When contact 13 when break-make interface 7 moves, node P4 is a high potential among Fig. 6, triode Q6 among Fig. 7 then, Q7 all ends, metal-oxide-semiconductor Q5 also ends, node P2 goes up no-voltage.When contact is inserted into the break-make interface, switch S 1 ground connection among Fig. 6, make node P4 become electronegative potential, triode Q6, the equal conducting of Q7, the power supply on the node P3 to capacitor C 7 chargings, will make metal-oxide-semiconductor Q5 grid voltage progressively descend by resistance R 10, triode Q6, resistance progressively reduces between metal-oxide-semiconductor Q5 source electrode and drain electrode thereby make, thereby realizes that node P2 goes up the soft start of voltage.Node P2 goes up the value decision of the rise time of voltage by resistance R 9, R10 and capacitor C 7.Select the value of suitable resistance R 9, R10 and capacitor C 7, after contact inserts the break-make interface fully and puts in place, just make progressively conducting of metal-oxide-semiconductor Q5, and insert in the process of break-make interface at contact, metal-oxide-semiconductor Q5 not conducting as yet is so be a cold slotting process on electric.Avoided like this that pure mechanical switch brings power up the time shake, realized making the utility model embodiment more reliable to the soft start of the power supply of external termination and cable that is attached thereto and the first-class subsequent parts of high frequency.
After receiver shutdown or the standby, node P3 goes up residual voltage and drops to about 8V when following, and control circuit and driving mechanism just can move, and make contact disengaging break-make interface, and this is a Cold Drawing Process, needn't consider jitter problem.
Embodiment 2:
Between the two ultimate range was 5cm after contact and break-make interface disconnected as different from Example 1.All the other are identical with embodiment 1.
Embodiment 3:
Between the two ultimate range was 100cm after contact and break-make interface disconnected as different from Example 1.All the other are identical with embodiment 1.
Claims (10)
1. lightning protection automatic switch that is used for satellite television receiver, it is characterized in that: comprise housing, respectively be provided with an external termination that connects external cable at the two ends of housing, wherein the other end of the external termination of a side is connected with the break-make interface, and wherein the other end of the external termination of opposite side is connected with inside cable; In housing, be provided with guide assembly, on described guide assembly, driving mechanism is installed, driving mechanism links to each other with the external termination of opposite side by inside cable, on described driving mechanism, be provided with control circuit board and by the motor of control circuit board control, the contact that is used with the break-make interface be installed at an end of driving mechanism.
2. the lightning protection automatic switch that is used for satellite television receiver according to claim 1 is characterized in that: the ultimate range of the relative motion between described break-make interface and the contact that is mated is 5cm～100cm.
3. the lightning protection automatic switch that is used for satellite television receiver according to claim 1, it is characterized in that: described housing is to be connected and composed by front side cap and rear side cover, described guide assembly is by being parallel to each other and two groups of guide rails in the same plane constitute, wherein one group of guide rail is located at the front side cap inwall, and another group guide rail is located at the rear side cover inwall.
4. the lightning protection automatic switch that is used for satellite television receiver according to claim 3, it is characterized in that: described guide rail comprises gathering sill and is positioned at the tooth bar of gathering sill below, the side that described driving mechanism is relative with guide rail is provided with the projection that matches with gathering sill, be provided with the gear that matches with tooth bar below projection, described gear is connected on the motor of driving mechanism inside by gear box.
5. according to any described lightning protection automatic switch that is used for satellite television receiver of claim 1 to 4, it is characterized in that: described driving mechanism comprises supporting surface, four angles at supporting surface respectively are provided with a projection that cooperates with guide assembly, contact is installed above supporting surface, the both sides of contact respectively are provided with a super capacitor, respectively be provided with a switch in the both sides of electric capacity, described switch is fixed on the circuit board of contact top, respectively is provided with a triggering projection that is used for trigger switch at the two ends of described housing; Be fixed with motor below supporting surface, motor output shaft is connecting the gear that cooperates with guide assembly by gear box.
6. the lightning protection automatic switch that is used for satellite television receiver according to claim 5, it is characterized in that: an end of described contact links to each other with inside cable, the other end of contact is provided with the core pin and is positioned at the outer external shield of core pin, the middle part of core pin picks out pin, and pin links to each other with described circuit board; Be provided with in the described break-make interface and core needle guide body and outer shielding layer conductor.
7. according to any described lightning protection automatic switch that is used for satellite television receiver of claim 1 to 4, it is characterized in that: described control circuit comprises soft startup of electric power unit and motor operation unit, described motor operation unit comprises monitoring modular, and described monitoring modular is connecting motor drive module.
8. the lightning protection automatic switch that is used for satellite television receiver according to claim 3, it is characterized in that: be provided with transparent loam cake above housing that front side cap and rear side cover constitute, described front side cap, rear side cover and loam cake adopt the plastic material of insulation to make.
9. according to any described lightning protection automatic switch that is used for satellite television receiver of claim 1 to 4, it is characterized in that: described inside cable is a spirality.
10. according to any described lightning protection automatic switch that is used for satellite television receiver of claim 1 to 4, it is characterized in that: be connected by semiconductor switch between described inside cable and the contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020166229XU CN201639259U (en) | 2010-04-22 | 2010-04-22 | Lightning protection automatic switch for satellite television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020166229XU CN201639259U (en) | 2010-04-22 | 2010-04-22 | Lightning protection automatic switch for satellite television receiver |
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| CN201639259U true CN201639259U (en) | 2010-11-17 |
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| CN201020166229XU Expired - Fee Related CN201639259U (en) | 2010-04-22 | 2010-04-22 | Lightning protection automatic switch for satellite television receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064520A (en) * | 2010-04-22 | 2011-05-18 | 杭州祺来电子有限公司 | Lightning protection automatic switch for satellite television receiver |
-
2010
- 2010-04-22 CN CN201020166229XU patent/CN201639259U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064520A (en) * | 2010-04-22 | 2011-05-18 | 杭州祺来电子有限公司 | Lightning protection automatic switch for satellite television receiver |
| CN102064520B (en) * | 2010-04-22 | 2013-07-03 | 杭州祺来电子有限公司 | Lightning protection automatic switch for satellite television receiver |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20170422 |