CN100426598C - New plug-type power supply unit - Google Patents
New plug-type power supply unit Download PDFInfo
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- CN100426598C CN100426598C CNB2005100328110A CN200510032811A CN100426598C CN 100426598 C CN100426598 C CN 100426598C CN B2005100328110 A CNB2005100328110 A CN B2005100328110A CN 200510032811 A CN200510032811 A CN 200510032811A CN 100426598 C CN100426598 C CN 100426598C
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Abstract
The present invention relates to a plug device with a built-in switch mode power supply, which comprises an outer shell of a built-in switch mode power supply circuit, a latch which extends vertically out of the front end wall of the outer shell, and a low voltage connecting wire which extends out from the back end of the outer shell for working with a power supply, wherein a printed circuit board (PCB) of the switch mode power supply circuit is arranged in the outer shell. The novel plug type power supply device is characterized in that the cross section of the front end wall of the outer shell has the length from 27.2 to 44.2mm and the width from 19.4 to 24.4mm, and the thickness between the front end and the back end of the outer shell is from 35 to 60mm. The printed circuit board of the switch mode power supply arranged in the outer shell is positioned in the direction approximately vertical to the wall surface of the front end of the outer shell and tightly attached on the front end wall of the outer shell. The present invention has the advantages of small volume and convenient carrying, and can meet the requirements of decentralized execution, standard rule, EMC, input and output performances, etc.
Description
Technical field
The present invention relates to establish in a kind of having the plug device of switched-mode power supply, the shell that includes built-in switch mode power circuit, the latch that vertically stretches out from the front bulkhead of this shell, be used for stretching out the low pressure connecting line, the printed circuit board (PCB) (PCB) of a switched-mode power supply circuit is set in this shell with the power supply cooperating and from the rear end of above-mentioned shell.
Background technology
Existing multinomial invention is devoted to AC/DC adapter is integrated into the plug-type power supply unit that is used for electric network source in the prior art.These adapters electric equipment products in daily life are very useful, and many electronic devices need the lower power supply of a kind of voltage, and lower power consumption.But the physical size of previous translation circuit is all bigger and heavy usually.
At present, most of low-power AC/DC adapter are all used a kind of lienar for technology, the lienar for converter is made of the transformer that voltage is reduced to proper level an energy, one or four diodes that are used for voltage is carried out rectification can be set selectively, and be provided with a capacitor that is used for smooth voltage.In most of situations, the still lienar for converter of use, this makes AC/DC adapter have a kind of switch of similar plug, can be inserted in the wall socket, is suitable for the electronic equipment such as mobile phone.Along with size is dwindled, because the isolation of needed primary side causes one group of new problem, and because switching technique has caused some problems relevant with Electro Magnetic Compatibility, problems such as for example heat radiation, safety, EMC, input and output performance.Several problems in different technical fields will need to solve simultaneously, so that construct a kind of small size that has.
Summary of the invention
At above-mentioned defective, main purpose of the present invention is to provide a kind of plug-type power supply unit, its not only volume urinate in carrying, and can meet requirements such as heat radiation, safety, EMC, input and output performance.To achieve these goals, the invention provides a kind of new plug-type power supply unit, include shell, the metal bolt of vertically stretching out from the front bulkhead of above-mentioned shell, be used for stretching out the low pressure connecting line with the power supply cooperating and from the rear end of above-mentioned shell, it is characterized in that shell front bulkhead cross sectional configuration, its length is 27.2mm--44.2mm, and width is 19.4mm-24.4mm; Thickness is 35mm-60mm between front end and the rear end; Place the switched-mode power supply printed circuit board (PCB) in the shell to locate perpendicular to the direction of shell front end wall, and be close to the shell front bulkhead along cardinal principle.The front bulkhead of shell of the present invention and metal bolt constitute the input block integral body that can change, and metal bolt is passed front bulkhead and is connected with printed circuit board (PCB).
Latch thickness on the front bulkhead of the present invention is 1.5mm, and the latch width is 6.2mm, and the distance between two latches is 11.2mm.The transversal face length back gauge of latch on the described front bulkhead and front bulkhead is 6.5mm-9mm; Nearby end wall cross section broadside distance is 6.5mm-15mm.The step of the oriented peripheral projection in shell forward position that is connected with described front bulkhead.
Shell fragment on the input block of the present invention be pressed in printed circuit board (PCB) certain the one side on metallized pads on.
Shell fragment on the described input block of present inventor is pressed on the metallized pads of printed circuit board (PCB) flank side surface.
The pin of the L-shaped easy welding that is connected with metal bolt that input block of the present invention is drawn connects printed circuit board (PCB), and the pin of described L-shaped easy welding inserts in the plated-through hole of printed circuit board (PCB).
The exit of input block of the present invention is connected with the use in printed circuit board flexible cord.
Low pressure connecting line of the present invention is fixedlyed connected with a standard interface, by various adapters, with the power consumption equipment interface.
Inner surface of outer cover of the present invention has pit, and inner surface of outer cover has the part of pit can be thinner than shell integral body.Described sheathing material thickness is no more than 2mm.Described shell for fixing output line, satisfy purposes such as safety requirement, stiffened shell, inner surface of outer cover is provided with muscle.Be provided with support column in the described shell.
All well the coincide inner space of shell of printed circuit board (PCB) outer shape of the present invention and size.The printed circuit plate thickness is 0.8mm.After the device selected for use on the described printed circuit board (PCB) is installed, its with respect to the vertical height of printed circuit board (PCB) less than 14.5mm.Described printed circuit board (PCB) positive and negative all can installing device.Described printed circuit board (PCB) wherein simultaneously is not higher than the device of 2mm.Also be provided with other device below the described printed circuit board (PCB) employing stereoscopic arrangement, the device that has.The parallel axes of the electrochemical capacitor that capacity is bigger on the described printed circuit board (PCB) is in the printed circuit board (PCB) face.The parallel axes of withstand voltage higher electrochemical capacitor is in the printed circuit board (PCB) face on the described printed circuit board (PCB).After transformer is selected installation for use on the described printed circuit board (PCB), its with respect to the vertical height of printed circuit board (PCB) less than 14.5mm; The electrochemical capacitor diameter necessarily selects less than 14.5mm.
Transformer Winding of the present invention can be used than the wideer insulation of the coiling of skeleton distance and this winding of adhesive tape anti-package of safety.
The insulating tape of the broad of the certain number of plies of coiling on the transformer framework of the present invention, tape width are the summations of backbone winding line width, this winding coiling thickness and the anti-package degree of depth.The inboard coiling enamelled wire of the wide adhesive tape of described transformer.The width of described other layer insulation adhesive tapes of transformer coiling is a little littler than the coiling width of skeleton.Described transformer must put the sleeve pipe that meets certain requirements when enamelled wire lead-out wire bag, this sleeve pipe must reach the insulating tape place of anti-package.
Printed circuit board (PCB) of the present invention uses wideer copper sheet to big current network as far as possible, and the device comparatively serious to heating adopts the copper sheet that strengthens its pin.Need the device surface of heat radiation to be stained with sheet metal on the printed circuit board (PCB) by heat-conducting glue.Described printed circuit board (PCB) is set up safe isolation strip between dangerous voltage side and safety extra low voltage side.Slot on the described printed circuit board (PCB).
The muscle that inserts described printed circuit board (PCB) fluting is arranged, in order to isolate the copper sheet of both sides printed circuit on the shell of the present invention.
New plug-type power supply unit of the present invention is inserted a switched-mode power supply circuit in the limited space of plug, by with the printed circuit board (PCB) of switched-mode power supply circuit along substantially perpendicular to the direction location of shell front end wall.Whereby, the present invention not only volume urinates in carrying, and can meet requirements such as heat radiation, safety, EMC, input and output performance.
The first, the volume of product of the present invention little, be easy to carry.
Comparatively huge with the various power volumes of selling on the market, profile is stiff different, power volume of the present invention is very little, and (travelling takes up room: 40mm * 35mm * 15mm), weight has great portability less than 50g, is better than the power supply of nearly all producer of seeing in the market greatly.Power supply good looking appearance, the fashion that should invent, and performance brilliance simultaneously.
The second, the invention solves the heat dissipation problem of plug type power.
At first, in the circuit theory design, select the higher implementation of whole work efficiency as far as possible, as (TNY266 is a kind of minitype single-chip Switching Power Supply to select TNY266, it is under the situation of direct current output zero load, complete machine input power consumption is extremely low, can be less than 0.2W) inverse-excitation type switch power-supply (rising that can bring cost so certainly) formed.
Secondly, aspect parts selection, select the less device of power loss as far as possible, select loss low as magnetic core of transformer, crucial electrochemical capacitor select low impedance at high frequency, switching device select conduction voltage drop low, switching loss is little or the like.
Once more,,, improve the efficient of plug type power overall work as the transformer turn ratio by parameters optimization design, thus the loss when reducing plug type power work.
At last, when PCB designs, big current network is used wideer copper sheet as far as possible, reduce heating and prevent hot concentrating, in order to avoid the air themperature of roasting hot plug body inside; The device comparatively serious to heating, as the DC diode of TNY266, low-pressure side, the electrochemical capacitor that flows through more high-frequency current, high-frequency power transformer etc., adopt the method for the copper sheet strengthen its pin as far as possible strengthen the generating heat auxiliary heat dissipation of comparatively serious device, improve the uniformity that the plug body internal heat distributes, this can reduce the temperature rise of plug body internal components on the one hand, can also prevent that individual devices is overheated, improve the reliability of plug type power.
For what device temperature still can not meet the demands in the heat test after adopting various measures, the a certain optimal case of this invention is: provide a kind of sheet metal is bonded at the device special process measure on the surface of easy heat radiation by heat-conducting glue, through test, this measure can significantly reduce the temperature rise of certain device.
Three, the invention solves the safety problem of plug type power.
At first, optimize the PCB design, satisfy the requirement that has tangible safe isolation strip between dangerous voltage side and the safety extra low voltage side, then slot in the not enough a little place of distance, not only to slot in the serious not enough place of distance, but also the PCB copper sheet that the muscle of the insertion PCB fluting on the design plug type power shell is isolated both sides.
Secondly, because the space is very limited, and some bigger devices of plug type power inside, as big electrochemical capacitor, installation will inevitably lie low, can there be the very little problem of distance in these devices with the device of opposite side to a great extent, and the measure that this invention addresses this problem is that the muscle that uses the plug type power inner surface of outer cover to stretch out isolates the both sides device.
Once more, the selection of the device between the both sides on the isolation strip is also very crucial with design, must select to satisfy dielectric voltage withstand requirement more than the 3000VAC as the light lotus root, and the winding that transformer links to each other with two lateral circuits must satisfy certain creepage distance requirement; Here problem is, the selection ratio of simple device is easier to, the comparison difficulty but the design of the safety of transformer just seems, because free air anomaly is limited, magnetic core of transformer can only select size smaller, as EE10, the coiling of the skeleton of magnetic core correspondence distance is just shorter like this, be generally less than 6.5mm, the occasion that requires for the creepage distance that generally requires 5mm, the present invention proposes a kind of not only economy but also simple solution: each winding all uses than the wideer insulation of the coiling distance of skeleton and this winding of adhesive tape anti-package of safety, and the creepage distance that meets the demands between two windings that need insulation is provided by this measure.
At last, the design of optimizing the inverse excitation type converter transformer is provided, reduce the operating voltage of switched field effect power tube devices such as (MOSFET), reduce the operating voltage of both sides, isolation strip network with this, thereby reduce the requirement of both sides, isolation strip creepage distance, keep bigger arrangement space for the inner PCB of plug type power.
Four, the invention solves the EMI design problem of plug type power.
At first, select for use the cellular phone power supplies dedicated PWM controller that carries the switching frequency shake of POWER INTEGRATIONS company to design whole Power Conversion unit.The frequency jitter technology is a kind of effective measures that reduce conduction interference that industry has just occurred recently, its principle is constantly to change the frequency from the noise of tested testing of equipment port outflow, because conduction interference measure equipment can be taked the filtering measures of certain hour when the mean value of test conduction interference, like this, the noise of testing at certain Frequency point will be reduced continuous the variation owing to frequency, thereby causes whole test result to diminish; This technology is proved the effective measures of effective inhibition conduction interference by a lot of fields of industry, integrated this technology of this chip, just do not need to add the control circuit of a cover frequency jitter, both reduced cost, also reduced to realize this part repertoire device the space that takies PCB (in addition, also built-in MOSFET of this device and oscillator have significantly reduced the quantity of the peripheral components in the schematic circuit); In several first-selected application schemes of the present invention, all used this device, through relatively, use this device can reduce the conducted noise that product of the present invention emits greatly really.
Secondly, the switching regulator converter of AC/DC often produces comparatively powerful noise when operate as normal, in the implementation of several first-selections of the present invention, all emphasizes to use the filter of certain suitable parameters collocation; In the implementation of some first-selections, used " pi type filter ", the capacity of two electric capacity is respectively 0.1uF (high frequency metalized film capacitor) and 6.8uF (electrochemical capacitor of low impedance at high frequency), inductance value is about 1mH, actual test shows, this filter still is very effective, and this filter can reduce more than the radio noise 10DbuV/m, reduces conducted noise also about 10DbuV.
Once more, in the practical application of the present invention, taked some unique EMI braking measures to suppress the EMI that product of the present invention produces; In first-selected implementations more of the present invention, the all low-impedance safety electric capacity that has connected the 2200PF of a high frequency to 4700PF on the place of working of the both sides, isolation strip of high frequency transformer, with the noise that comes the short circuit high frequency transformer to produce, this measure is particularly effective to the conduction interference that reduces product of the present invention; In first-selected implementations more of the present invention, all in the transformer internal structure Faraday shield, this screen is drawn and is linked to each other with the place of working on former limit after the high frequency transformer, this shielding measure has also been made certain contribution to suppressing product E MI of the present invention.
At last, in the practical application of the present invention, taked a large amount of PCB to reduce optimizing distribution of EMI and the standardization design of cabling is reduced generating noise, these standardization designs are products that practical experience and high-frequency electromagnetic field theory, antenna theory etc. combine; These normalized designs about the PCB that reduces the EMI noise comprise a lot of contents, enumerate that some are as follows: layout device clearly, and make the power flow direction on the whole PCB clearly demarcated, can not intersect repeatedly, perhaps repeatedly coupling; The device of both sides, isolation strip as far as possible away from, to reduce undesirable coupling; Reduce the area of the network copper sheet encirclement of big current changing rate, to reduce differential mode noise and to avoid producing resonance by the leakage inductance that reduces these copper sheets, as the loop of former limit switching device switch, the conducting loop of secondary diode, driving loop of former limit switching tube or the like; The symmetry that improves the Primary Component layout is to reduce the noise chance of conversion mutually; The stronger device of key signal line principle noise with the signal integrity of raising functional circuit and the reliability of work, is avoided circuit working instability generation harmonic wave or vibration is taken place and increase EMI; These measures reduce the noise that product of the present invention produces effectively, and the quality that improves product of the present invention, for end user's interests provide sound assurance.
Five, application of the present invention has very big flexibility.
In order to improve market adaptability to satisfy client's various demands flexibly, another design bright spot that the present invention comprises is to use " plug connectors of the different power consumption equipment ports of low pressure output cable+adaptation of standard " to satisfy the situation of requirements of different users and the different power consumption equipment ports of same user, this is in demand under many circumstances---just imagines, when our client goes on a long journey, may carry mobile phone, big capacity MP3, digital camera, digital video recorder or the like, in this case, the user only need carry a power supply the simplest and some adapters rather than the big and small power supply of a pile.
Another design bright spot of the present invention is that the latch that uses general plug-type shell and satisfy the standard of different regions is combined to form the profile of " plug type power ".The proposition of this inventive point is based on the requirement that reduces manufacturer's production cost; In order to adapt to the latch standard of different regions, if do not adopt this measure, need design different moulds in the time of will causing a product to sell to different regions, the area is many more and the big more mould kind that then needs of otherness is many more, and this may be unacceptable for manufacturer---because the cost of mould is higher; But take the method for " plug-type shell+satisfy the latch of the standard of different regions " can save most die cost, only need to make a latch that adapts to different regions and get final product.
Six, the present invention is fit to industrialized mass.
Under the prerequisite of industrialized production, make the processing request of plate processing factory in order to satisfy, improve production capacity, reduce production costs, the present invention also has one's own knack to the production of product of the present invention.Because it is too little finally to make board size, directly go up the related requests such as technology that production line can not satisfy production, in order to address this problem, in a first-selected embodiment of the present invention, adopt the area that the way of minimum PCB unit jigsaw is increased minimum PCB processing.After taking the jigsaw measure, another problem has just come one after another---because PCB is thinner, after the PCB area strengthens, owing to added a lot of flutings or V-CUT for minute plate is convenient, so just cause whole PCB intensity decreases, be difficult to produce,, proposed a kind of way of using a bulk of PCB of tray support in the first-selected embodiment of the present invention in order to address this problem.
Brief Description Of Drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effect apparent by detailed description to preferred embodiment of the present invention.
Fig. 1-the 1st, the moulded schematic diagram of plug-type power supply unit of the present invention.
Fig. 1-2 is the front bulkhead configuration and the dimensional drawing of plug-type power supply unit of the present invention.
Fig. 2 is the muscle of enclosure of plug-type power supply unit of the present invention and the schematic diagram of groove.
Fig. 3 is the low pressure connecting line of plug-type power supply unit of the present invention and the embodiment schematic diagram of adapter.
Fig. 4-1-4-8 is the input block embodiment schematic diagram of plug-type power supply unit of the present invention.
Fig. 5 is the circuit theory diagrams among plug-type power supply unit one embodiment of the present invention.
Fig. 6 is the design diagram of the PCB of plug-type power supply unit of the present invention.
Fig. 7 is the special process schematic diagram that plug-type power supply unit of the present invention is invented in order to solve high frequency transformer safety problem.
Fig. 8 be plug-type power supply unit of the present invention in order to solve the problem that single PCB is too little in the production special process schematic diagram of inventing.
Embodiment
Hereinafter, will describe the present invention in detail.
Product of the present invention is except placing the plate of making that satisfies the basic performance requirement of design the plug-type enclosure, also must solve because the narrow and small PCB design challenges of bringing in space, safety design challenges, an EMC difficult problem and owing to singlely make plate area too for a short time being unfavorable for and produce in enormous quantities or the like, the problem of various aspects, therefore, the specific embodiment of the present invention is the combination that solves various professional technique difficult problems.Each parts of product of the present invention all have the embodiment of several first-selections, are a kind of final execution modes that the combination in any of first-selected execution mode of the different parts of these products forms patent of the present invention; That is to say that the combination in any of the execution mode of several first-selections of different parts is all within the description scope of patent of the present invention.
The moulded schematic diagram of plug-type power supply unit of the present invention is seen Fig. 1, what comprise built-in switch mode power circuit is the shell 01 of plug type power, two parallel and identical metal bolt 23 of vertically stretching out from the front bulkhead of shell 01, and low pressure connecting line 03 is stretched out in the rear end of this shell 01, and an end of this low pressure connecting line 03 is connected with adapter.This metal bolt 23 and the plastic body (being front bulkhead) that is embedded in plug-type shell 01 bottom are for being " satisfying the input block of the different plug standards in different regions " of the present invention, these parts can be changed during concrete enforcement, can change the shape and the size of metal bolt 23 parts of this input block, requirement with the different regions standard that adapts to different regions makes things convenient for the end user; This different input blocks all can closely cooperate with plug-type shell 01 and connect, this input block plays the effect of getting energy from AC network, energy, uses to the end user through exporting from low pressure connecting line 03 after the professional processing from this input block input plug formula shell 01.For the least possible inner space that takies shell 01, the thickness of the plastic body of input block can be thin as much as possible, is generally less than 10mm, but in order to satisfy requirement of strength, necessarily greater than 2mm.
The front bulkhead body of this shell 01 is equivalent to and does not exceed the front bulkhead cross sectional configuration that meets as Fig. 1 plug substantially.Shown in Fig. 1-2, the size of the shell 01 of plug-type power supply unit of the present invention satisfies the dimensional standard of plug, and shell front bulkhead cross sectional configuration, its length are 35.17mm--35.19mm, and width is 19.79mm-19.81mm; Thickness is 35mm between front end and the rear end; Place the switched-mode power supply printed circuit board (PCB) in the shell to locate perpendicular to the direction of shell front end wall, and be close to the shell front bulkhead along cardinal principle.Latch thickness on the front bulkhead is 1.39-1.41mm, and the latch width is 6.19-6.21mm, and the distance between two latches is 11.2mm.Latch on the front bulkhead nearby long back gauge of end wall cross section is 6.5mm-9mm; Nearby end wall cross section broadside is apart from 6.5mm-15mm.The step of the oriented peripheral projection in shell forward position that front bulkhead connects.
Low pressure connecting line 03 among Fig. 1 is the power output block of product of the present invention, be also referred to as the output cable of upper end, this low pressure connecting line 03 is installed on plug type power upper left-hand (see figure 1), this low pressure connecting line 03 has used the special-purpose sheath that prevents that the cable root is stressed with plug-type shell 01 contact site, and this sheath is used to guarantee that low pressure connecting line 03 and plug-type shell 01 junction can not fracture or this low pressure connecting line 03 inside can be because of the wire fracture loose contact; This low pressure connecting line 03 other end has a connector, and this connector has two purposes, and at first, this connector can be directly and some terminal power consumption equipment, as the inferior mobile phone of promise machine, connects and provides stable electric energy to it; Secondly, by the adapter that uses an end to be connected, just can satisfy the charging demand of all terminal power consumption equipments in theory with this connector; This design flexible is not only brought great convenience in the use to the user---and only need carry a power supply when going on business or travelling and get final product, and having brought great benefit to manufacturer---production standard output cable and various adapter get final product, and the variation of these adapters does not influence the assembling of entire product.
Adapter among Fig. 1 is the parts that can be connected with that end away from plug-type shell 01 of low pressure connecting line 03, and this is the mentality of designing of a kind of novelty of proposing with electrical interface for the difference that adapts to the different terminals power consumption equipment.
Fig. 2 is the design diagram of muscle, groove and the support column of the inside of plug-type shell 01, it is a kind of design of first-selected execution mode of one side of something 05 of whole plug formula shell 01, design at a complete plug type power shell 01 needs two such one side of something to form whole casing 01, half of 05 symmetry among another half of profile and Fig. 2, but the position of internal recess 06 and muscle 07～11 and width, length all can be different; In order to satisfy requirement of strength, the local thickness of this plug-type shell 01 material overwhelming majority can not be thinner than 0.8mm (having only the part may be thinner than 0.8mm); In fact the most of place of the thickness of shell 01 is 1.2mm, and only places such as recessing 06, bending part are not that 1.2mm is thick; And in order to strengthen shell 01 inner space as far as possible, sheathing material thickness can not surpass 2mm.
The first-selected embodiment that the groove 06 of plug-type shell 01 is among Fig. 2, this groove 06 is one of key feature of the present invention, the purpose that leaves this groove 06 is and can places plug-type shell 01 inside to the plate (being printed circuit board (PCB)) of making of the present invention; In order to satisfy the dimensional standard of plug, the external dimensions of plug-type shell 01 must satisfy the full-size requirement of plug size standard, in addition in order to guarantee the mechanical strength of shell 01, shell 01 must reach certain thickness requirement, will inevitably cause reducing of inner space like this, some device can not be unconfined little when the design device in the present invention, will bring like this because too high the making plate and can't inserting plug-type shell 01 inside of causing designing of some device, the at first implementation of this shell 01 of the present invention had both been taked a part of shell 01 is dug up a bit, make this place's attenuation, can place plug-type shell 01 inside to the plate of making of the present invention easily thereby reach; Groove 06 is used to solve the space problem of high-frequency power transformer in this first-selected implementation; On another one side of something 05 of plug-type shell 01 of the present invention, similar groove 06 is also arranged, make the space problem of the higher device of plate another side with solution; Owing to opened these grooves 06, the thinnest part of plug-type shell 01 of the present invention is approximately 0.6mm.
The muscle 07 that comprises plug-type shell 01 inside among Fig. 2, another of this muscle 07 and shell 01 half of 05 cooperate and play the fixedly purpose of input block; See a kind of first-selected embodiment that meets the input block of a certain regional plug standards of the present invention among Fig. 4, during assembling, the platform of the projection in the middle of the plastic body of the input block among Fig. 4 part inlay with Fig. 2 in the groove 06 outer raceway groove of surveying in, upper and lower two parts shell 01 altogether after i.e. fixing input block.
The muscle 08 that comprises plug-type shell 01 inside among Fig. 2, the about 0.6mm of this muscle 08 thickness is used to cooperate fluting on the PCB to solve the safety problem; This is one of first-selected embodiment of the present invention's key of solving the safety problem.
The muscle 09 that comprises plug-type shell 01 inside among Fig. 2, the about 1.2mm of this muscle 09 thickness is used to cooperate PCB to go up the layout of isolation strip, to solve the safety problem of making the device of the both sides, isolation strip on the plate of the present invention; This also is one of first-selected embodiment of the present invention's key of solving the safety problem.
The muscle 10 that also comprises plug-type shell 01 inside among Fig. 2, muscle 10 herein mainly play the effect of the mechanical strength of reinforcing plug-type shell 01.
The muscle 11 that also comprises plug-type shell 01 inside among Fig. 2, muscle 11 herein play fixing low pressure connecting line 03 about.
Also comprise the support column 88 that increases for the intensity of strengthening shell 01 in the preferred option of the present invention among Fig. 2; This support column 88 is simultaneously exported from certain of shell 01, passes PCB after the assembling and goes up the perforate of reserving, and half of 05 contacts with another of shell 01, plays a supporting role with stiffened shell 01.
The design signal that Fig. 3 has illustrated the first-selected embodiment of a low pressure connecting line of the present invention and adapted to the adapter of using electrical interface of different electric terminal equipment; Totally five parts of lead 14, connector 15 and the magnet ring 20 that this low pressure connecting line comprises lead inner core 12, trellis cable cover(ing) 13, twin-core band sheath formed the design of the low pressure connecting line of first-selection of the present invention; Lead inner core 12 assembling backs are used to be welded on PCB in the inside of plug-type shell 01; Be stuck in muscle 11 positions among Fig. 2 after the assembling of trellis cable cover(ing) 13 parts, can play the effect of protection cable; Magnet ring 20 is a nickel core magnet ring that suppresses EMI, and this magnet ring 20 uses as the supplementary means of the EMI problem that solves product of the present invention, and that end of the position of magnet ring 20 close trellis cable cover(ing) 13 on the low pressure connecting line also may be in other positions of cable; Connector 15 is used for being connected with the electricity consumption port of end user device, provides high-quality electric energy to power consumption equipment; The preferred implementation of the connector 15 among Fig. 3 is to be designed to cooperate with the present electricity consumption port of certain a large amount of terminal equipments that use, as closes the charging port cooperation of Nokia mobile phone, like this some the time can save the inconvenience that adapter brings.
16,17,18,19 4 parts of electric energy adapter among Fig. 3 are first-selected execution mode of the present invention; Adapter 16 can be used for the auxiliary low pressure connecting line makes it to be fit to the more small and exquisite power consumption equipment of electricity consumption port; Adapter 17 can be used for the auxiliary low pressure connecting line makes it to be fit to the bigger power consumption equipment of electricity consumption port; Adapter 18 and adapter 19 can be used for the power consumption equipment that the auxiliary low pressure connecting line makes it to be fit to electricity consumption port more complicated.
Fig. 4 illustrated several first-selections of variable input block among the present invention embodiment and with several first-selected execution mode that is connected of PCB.
Metal bolt 23 among Fig. 4-1 is used for power taking, in the first-selected embodiment of input block of the present invention, the shape of this metal bolt 23 and size should be consistent with the plug standards in area, target market, only enumerated a kind of regional standard commonly used as signal among Fig. 4-1; 22 certain fixations of plastic body among Fig. 4-1; Shell fragment 21 among Fig. 4-1 and make firm and hard existing the electrical connection.
24 parts among Fig. 4-2 are represented PCB, with the shell fragment on the input block 21 be pressed in PCB 24 certain the one side on pre-designed metallized pads on.
Then be pressed on the pre-designed metallized pads of PCB side among Fig. 4-3 with the shell fragment on the input block 21.
Fig. 4-4 has illustrated another first-selected embodiment that the input block signal of telecommunication is drawn---use the pin 25 of the L-shaped easy welding that metal bolt 23 that draw and power taking has been connected from plastic body 22.
Fig. 4-5 has illustrated another first-selected embodiment that the input block signal of telecommunication is drawn---use the conduction flexible cord 26 of the band coat of paint that metal bolt 23 that draw and power taking has been connected from plastic body 22.
Fig. 4-6 has illustrated another first-selected embodiment that the input block signal of telecommunication is drawn---use from plastic body 22 metal bolt 23 that draw and power taking to be connected and the pin that certain degree of hardness is arranged 27 of vertical plastic body 22 lead surfaces.
Fig. 4-7 has illustrated the input block of embodiment of Fig. 4-4 and Fig. 4-5 two kind of first-selection and the connected mode of PCB 24---the conductive pin 25 of drawing from input block or lead 26 inserted in the pre-designed plated-through hole of PCB 24; If allow in the space, can cross wave-soldering to input block and PCB 24 together, otherwise, can take manual welding.
Fig. 4-8 has illustrated the input block and the connected mode of PCB 24 of the embodiment of a kind of first-selection that Fig. 4-6 describes---the conductive pin that certain degree of hardness is arranged 27 of from input block, drawing directly insertion PCB 24 weld in advance in the socket of getting well.
Fig. 5 is the circuit theory diagrams among plug-type power supply unit one embodiment of the present invention, alternating voltage about the 50Hz of 90V～240V is through the insurance FR1 current limliting of resistance-type, through rectifier bridge BD1 rectification and C1, obtain the less direct voltage of ripple behind the filter filtering that L1 and C2 form, this direct voltage produces periodic pulsating voltage at the former limit of transformer T1 winding after PWM controller and switching device U1 control, this pulsating voltage passes to secondary through the power transformer of inverse-excitation type, through power diode D2, the C6 rectification obtains the less direct voltage of ripple, and this voltage passes through L2 at last, C7, the direct voltage that the further filtering of filter network that C9 forms obtains being of high quality is exported to the user and is used; Light lotus root U2 and its some peripheral circuits have constituted high-quality feedback control system, this this feedback output voltage method be far superior to the measure that common use voltage stabilizing didoe feeds back output voltage, this direct voltage high-quality for the present invention exports provide may.
The filter network that filter network, C6, L2 and the C7 that C1 among Fig. 5, L1 and C2 form, C9 form, capacitor C 5 etc. are the EMI that suppresses product of the present invention and make it EMI standard by the world, as EN55022 CLASS B etc., play a good role.
FR1 among Fig. 5 is a power resistor, and this resistance is between 1 Europe～100 Europe, and when power supply electrifying started, FR1 played the effect of limit value impulse current, reduces in the product start-up course of the present invention impact to AC network; When the power supply operate as normal of this product, if faults such as internal short-circuits, FR1 can blow very soon, plays the effect of similar insurance, has guaranteed the safe handling of other power consumption equipments well; Therefore, FR1 solves safety problem, the principal security measure that improves security of products of the present invention.
The example of the circuit parameter of one embodiment of the invention is as follows:
The insurance FR1 of a resistance-type, 1W/10 ohm is provided by Shaanxi Hua Xing company;
An input rectifying bridge BD1,0.5A/600V is provided by RECTRON company;
An inductor L1 who suppresses noise, 1mH ± 20%, company provides by sea light;
A high frequency capacitor C1,0.1U/630V is provided by EPCOS company;
The long-life electrochemical capacitor C2 of low impedance at high frequency, 6.8U/400V is provided by NCC company;
A high frequency capacitor C3,102/1KV is provided by EPCOS company;
A high frequency capacitor C4,104/50V is provided by EPCOS company;
The capacitor C5 of a safety, 222/X1Y1 is provided by EPCOS company;
The long-life electrochemical capacitor C6 of low impedance at high frequency, 470/6.3V is provided by NCC company;
The long-life electrochemical capacitor C7 of low impedance at high frequency, 330U/10V is provided by NCC company;
A high frequency capacitor C8,104/50V is provided by EPCOS company;
A high frequency capacitor C9,104/50V is provided by EPCOS company;
The controller U1 of the TOPSWITCH of a special use, TNY266 is provided by PI company;
A photoelectrical coupler U2, PC817 is provided by NEC Corporation;
A voltage reference device U3, TL431 is provided by Onsemi company;
A resistor R 1,150K is provided by Shaanxi Hua Xing company;
A resistor R 2,20K is provided by Shaanxi Hua Xing company;
A resistor R 3,10 is provided by Shaanxi Hua Xing company;
A resistor R 4,750 is provided by Shaanxi Hua Xing company;
A resistor R 5,3.6K is provided by Shaanxi Hua Xing company;
A resistor R 6,3.3K is provided by Shaanxi Hua Xing company;
A resistor R 7,150K is provided by Shaanxi Hua Xing company;
A high frequency transformer T1 uses the EE10 magnetic core, and company provides by Shenzhen sea light;
A fast diode D1 who recovers, FR107 is provided by RECTRON company;
The diode D2 of a Schottky, FR360 is provided by RECTRON company;
An inductor L2 who suppresses noise, 5uH ± 20%, company provides by Shenzhen sea light;
Main one of the present invention is characterised in that, in order to cooperate the plate of making that each side such as satisfying performance is required to place plug-type shell 01 inside, all devices of selecting for use are installed in PCB and go up the projection width of necessary another direction afterwards less than 14.5mm, be the diameter of electric capacity or highly must be less than 14.5mm, the height of transformer must be less than 14.5mm or the like.
Particularly, the electrochemical capacitor of some devices bigger as capacity (as the 6.3V/1000uF of secondary) and withstand voltage higher (as the 450V/6.8uF on former limit) can fall down to install, can not found dress and (use the vertically PCB installation of paster electrochemical capacitor, but cost can increase a lot), promptly on the printed circuit board parallel axes of the bigger or withstand voltage higher electrochemical capacitor of capacity in the printed circuit board (PCB) face; PCB does not have the side (being generally the wave soldering face) of very high device (as big electrochemical capacitor or transformer) not have the device that is higher than 2mm; Transformer selects for use height less than 14.5mm's; The electrochemical capacitor diameter necessarily selects less than 14.5mm's; Other devices of selecting for use necessarily can guarantee to install the vertical PCB height in back less than 14.5mm; The paster device accounts for the ratio of device sum more than or equal to 30%.Can adopt stereoscopic arrangement (see PCB, the device that has below also have device) from the direction on vertical PCB surface; The two sides of PCB all has device.For the performance that meets the demands, use Top switch or other application-specific integrated circuit (ASIC)s (as TNY266 etc.), can not use general PWM control IC such as 3844 to design.Satisfying under the prerequisite of performance requirement, in order to reduce the number of making device on the plate as far as possible, switch circuit topology is bound to select single-ended flyback switch power transformation topology.
Fig. 6 has illustrated the first-selected embodiment of the PCB that places the plug-type enclosure of the present invention and the feature that some are indispensable.Wherein housing 34 is profiles of minimum PCB unit, and housing 34 inside are provided with fluting 28～33 on PCB, and fluting 28～33 preferred width are 1mm.The part that the right side of described fluting 28,29 and PCB housing 34 surround is for finally making the profile of plate; Remaining part is only the plate of making that final needs place plug-type shell 01 inside remove the PCB of a fritter blank in fluting 28,29 left sides on the basis of the minimum PCB housing 34 that splits out after production is finished after, and the printed circuit board (PCB) that is provided with the switched-mode power supply circuit is along substantially perpendicular to the direction location of plug-type shell 01 front end wall; The profile that the present invention makes plate for the first-selected embodiment that solves the maximum problem of utilizing in plug-type enclosure space is to make is the inner space of identical plug-type shell well---see the shape of the part of slot among Fig. 6 28,29 right sides and 34 encirclements of PCB housing.
The minimum unit of PCB is designed to rectangular, sees the PCB housing 34 among Fig. 6, and it is too little to be to solve better in the actual production minimum PCB cell size, is convenient to jigsaw and one of PCB design outline of the first-selection of the present invention selected; Large-scale production requires the size of PCB any one limit must be arranged greater than 50mm, and obviously, the PCB size of product of the present invention is too little, can't satisfy whole requirement, and in order to address this problem, minimum PCB unit just must satisfy production requirement by jigsaw; The configuration design of minimum PCB unit is become the rectangle shown in the PCB housing 34 among Fig. 6, jigsaw is more prone to and jigsaw after Whole PC B intensity higher, this is the outstanding advantage of this first-selected embodiment of the present invention.
All the other flutings 30～33 among Fig. 6 all design in order to solve the safety problem, because the space is narrow and small, product of the present invention in addition relates to the very high safety requirement between the safety extra low voltage of the dangerous voltage of AC network and low pressure output, the safety problem just need take distinguished combination measure to solve, PCB fluting 30～33rd solves one of combination measure of safety problem, also is one of key feature of the present invention.
In addition, also to comprise the thickness of PCB be that 0.6mm is to 1.2mm to the first-selected embodiment of PCB of the present invention design; Because the space is very nervous, PCB can not be too thick, but in order to keep certain intensity, PCB again can not be too thin, weighs the demand of these two inventive aspects, and the design thickness of PCB first-selection of determining product of the present invention between the 1.2mm, can not surpass 2mm at 0.6mm; And all well the coincide inner space of shell 01 of PCB outer shape and size.
Fig. 7 has illustrated in order to solve transformer safety problem, the transformer technique for coiling embodiment and the concrete operating process of this technology in product of the present invention of a kind of first-selection that the present invention proposes.
35,37,41 3 parts of insulating tape among Fig. 7 all satisfy certain insulating requirements, and just the width and the number of plies can be different; Enamelled wire 36 among Fig. 7 satisfies the current density of product of the present invention; " H " shape frame table of the black shown in Fig. 7 shows the skeleton 38 of the transformer that product of the present invention is selected for use; First winding 39 and second winding 40 that also comprise the transformer of product of the present invention among Fig. 7; The degree of depth of the insulating tape anti-package of the label among Fig. 7-7 " S " expression anti-package; From Fig. 7-1 to Fig. 7-8 all eight figure, only illustrated the last half side coiling situation of skeleton 38 when describing concrete technique for coiling, the latter half is not described, but the following half side coiling situation of skeleton 38 is symmetrical fully with the first half, and just signal is not come out.
The special process coiling flow process of the solution transformer safety problem of the first-selection that the present invention proposes sees that Fig. 7-1 to Fig. 7-8 (flowing out schematic diagram with the coiling that two windings are example), specifies as follows:
Fig. 7-1: the insulating tape 35 of the broad of the certain number of plies of coiling on skeleton 38, insulating tape 35 width are summations of skeleton 38 coiling width, first winding, 39 coiling thickness and anti-package depth S; Insulating tape 35 numbers of plies require to decide on concrete safety.
Fig. 7-2: at the ground floor enamelled wire 36 of good wide insulating tape 35 inboard coiling first windings 39 of Fig. 7-1 coiling.
Fig. 7-3: coiling layer insulation adhesive tape 37, the width of this layer insulation adhesive tape 37 guarantee that than a little bit smaller a little point of the coiling width of skeleton 38 layer insulation adhesive tape 37 covers winding substantially fully and overlapping getting final product do not arranged.
Fig. 7-4: the second layer enamelled wire of coiling first winding 39.
Fig. 7-5: the second road layer insulation adhesive tape of coiling first winding 39.
Fig. 7-6: the 3rd layer of enamelled wire of coiling first winding 39.
Wide insulating tape 35 anti-packages among Fig. 7-7: Fig. 7-1; In flow process shown in Fig. 7-7, if winding needs coiling is not 3 layers, then the rest may be inferred determines winding method at Fig. 7-1.
Fig. 7-8: finish the coiling of second winding 40 according to above-mentioned Fig. 7-1 to the similar winding method of Fig. 7-7; Because wide adhesive tape is anti-package, its one side that glue is arranged is outside, in order to address this problem, and need be at the outermost insulating tape of the certain number of plies of coiling again; Whether the number of plies of outermost adhesive tape depends on to have after the wide adhesive tape anti-package of transformer second winding 40 and overlaps and overlap distance what are arranged herein, if it is enough big to overlap distance, then outermost at most only needs one layer tape, otherwise must investigate the number of plies that concrete safety requires to determine the outermost adhesive tape.
This special technique for coiling must put the sleeve pipe that meets certain requirements when enamelled wire lead-out wire bag, this sleeve pipe must reach the insulating tape place of anti-package, so just is unlikely to make some safety measures to be lost efficacy.
The embodiment that the first-selection of the present invention that the present invention adopts in order to solve minimum PCB unit and can not to satisfy the requirement of at present general production procedure has been described shown in Figure 8---minimum PCB unit is connected together in some way in turn, middle with " V " shape cutting processing, add housing to improve the intensity of Whole PC B.
Be two location holes 42 and 43 that stay at the diagonal angle after minimum PCB cell processing is finished among Fig. 8, be used for the location of process of manufacture auxiliary equipment; Fig. 8 also comprise be in the back of finishing dealing with on the technology limit 45 that outermost adds, be used for reinforcing and cross purposes such as crest.
Claims (22)
1. new plug-type power supply unit, include shell, the metal bolt of vertically stretching out from the front bulkhead of above-mentioned shell, be used for and power supply cooperating and the low pressure connecting line that stretches out from the rear end of above-mentioned shell, it is characterized in that shell front bulkhead cross sectional configuration, its length is 27.2mm-44.2mm, and width is 19.4mm-24.4mm; Thickness is 35mm-60mm between front end and the rear end; Place the switched-mode power supply printed circuit board (PCB) in the shell to locate perpendicular to the direction of shell front end wall, and be close to the shell front bulkhead along cardinal principle; Described front bulkhead and metal bolt constitute the input block integral body that can change, and metal bolt is passed front bulkhead and is connected with printed circuit board (PCB).
2. a kind of new plug-type power supply unit according to claim 1 is characterized in that the latch thickness on the described front bulkhead is 1.5mm, and the latch width is 6.2mm, and the distance between two latches is 11.2mm.
3. a kind of new plug-type power supply unit according to claim 2 is characterized in that latch and the transversal face length back gauge of front bulkhead on the described front bulkhead is 6.5mm-9mm; With front bulkhead cross section broadside distance be 6.5mm-15mm.
4. a kind of new plug-type power supply unit according to claim 3 is characterized in that the step of the oriented peripheral projection in shell forward position that is connected with described front bulkhead.
5. a kind of new plug-type power supply unit according to claim 4 is characterized in that shell fragment on the described input block is pressed on the metallized pads on certain one side of printed circuit board (PCB).
6. a kind of new plug-type power supply unit according to claim 5 is characterized in that the shell fragment on the described input block is pressed on the metallized pads of printed circuit board (PCB) flank side surface.
7. a kind of new plug-type power supply unit according to claim 5, the pin that it is characterized in that the L-shaped easy welding that is connected with metal bolt that described input block is drawn connects printed circuit board (PCB), and the pin of described L-shaped easy welding inserts in the plated-through hole of printed circuit board (PCB).
8. a kind of new plug-type power supply unit according to claim 5 is characterized in that the exit of described input block is connected with the use in printed circuit board flexible cord.
9. a kind of new plug-type power supply unit according to claim 1 is characterized in that described low pressure connecting line fixedlys connected with a standard interface, by various adapters, with the power consumption equipment interface.
10. a kind of new plug-type power supply unit according to claim 1 is characterized in that described inner surface of outer cover has pit, and inner surface of outer cover has the part of pit to be thinner than shell integral body.
11. a kind of new plug-type power supply unit according to claim 10 is characterized in that described sheathing material thickness is no more than 2mm.
12. a kind of new plug-type power supply unit according to claim 11, it is characterized in that described shell for fixing output line, satisfy that safety requires, the stiffened shell purpose, inner surface of outer cover is provided with muscle.
13. a kind of new plug-type power supply unit according to claim 12 is characterized in that being provided with support column in the described shell.
14. a kind of new plug-type power supply unit according to claim 1 is characterized in that all inner spaces of identical shell of described printed circuit board (PCB) outer shape and size.
15. a kind of new plug-type power supply unit according to claim 14 is characterized in that described printed circuit plate thickness is 0.8mm.
16. a kind of new plug-type power supply unit according to claim 15, it is characterized in that the device selected for use on the described printed circuit board (PCB) is installed after, its with respect to the vertical height of printed circuit board (PCB) less than 14.5mm.
17. a kind of new plug-type power supply unit according to claim 16 is characterized in that the equal installing device of described printed circuit board (PCB) positive and negative.
18. a kind of new plug-type power supply unit according to claim 17 is characterized in that described printed circuit board (PCB) wherein simultaneously is not higher than the device of 2mm.
19. a kind of new plug-type power supply unit according to claim 18 is characterized in that described printed circuit board (PCB) adopts stereoscopic arrangement, also is provided with other device below the device that has.
20. a kind of new plug-type power supply unit according to claim 19, the parallel axes that it is characterized in that the electrochemical capacitor that capacity is bigger on the described printed circuit board (PCB) is in the printed circuit board (PCB) face.
21. a kind of new plug-type power supply unit according to claim 19, the parallel axes that it is characterized in that withstand voltage higher electrochemical capacitor on the described printed circuit board (PCB) is in the printed circuit board (PCB) face.
22. a kind of new plug-type power supply unit according to claim 19, it is characterized in that transformer is selected installation for use on the described printed circuit board (PCB) after, its with respect to the vertical height of printed circuit board (PCB) less than 14.5mm; The electrochemical capacitor diameter necessarily selects less than 14.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100328110A CN100426598C (en) | 2005-01-12 | 2005-01-12 | New plug-type power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100328110A CN100426598C (en) | 2005-01-12 | 2005-01-12 | New plug-type power supply unit |
Publications (2)
| Publication Number | Publication Date |
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| CN1812208A CN1812208A (en) | 2006-08-02 |
| CN100426598C true CN100426598C (en) | 2008-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100328110A Expired - Fee Related CN100426598C (en) | 2005-01-12 | 2005-01-12 | New plug-type power supply unit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280643A (en) * | 2013-06-15 | 2013-09-04 | 江苏辰阳电子有限公司 | Wall-mount plug |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273406A (en) * | 1978-12-28 | 1981-06-16 | Mitsuoka Electric Mfg. Co., Ltd. | Electrical cord adapter |
| EP0493080A2 (en) * | 1990-12-27 | 1992-07-01 | Ivac Corporation | Plug-in power supply adapter |
| US5161098A (en) * | 1991-09-09 | 1992-11-03 | Power Integrations, Inc. | High frequency switched mode converter |
| WO1994006177A1 (en) * | 1992-09-04 | 1994-03-17 | Egston Eggenburger System Elektronik Gesellschaft M.B.H. | Mains supply adapter for a small electric consumer |
| WO2003094305A1 (en) * | 2002-05-01 | 2003-11-13 | Microlead Technoloy Ltd. | Power supply unit |
-
2005
- 2005-01-12 CN CNB2005100328110A patent/CN100426598C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273406A (en) * | 1978-12-28 | 1981-06-16 | Mitsuoka Electric Mfg. Co., Ltd. | Electrical cord adapter |
| EP0493080A2 (en) * | 1990-12-27 | 1992-07-01 | Ivac Corporation | Plug-in power supply adapter |
| US5161098A (en) * | 1991-09-09 | 1992-11-03 | Power Integrations, Inc. | High frequency switched mode converter |
| WO1994006177A1 (en) * | 1992-09-04 | 1994-03-17 | Egston Eggenburger System Elektronik Gesellschaft M.B.H. | Mains supply adapter for a small electric consumer |
| WO2003094305A1 (en) * | 2002-05-01 | 2003-11-13 | Microlead Technoloy Ltd. | Power supply unit |
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|---|---|
| CN1812208A (en) | 2006-08-02 |
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