CN2840502Y

CN2840502Y - Small size power supply module

Info

Publication number: CN2840502Y
Application number: CNU2005200640451U
Authority: CN
Inventors: 徐晓宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-01
Filing date: 2005-09-01
Publication date: 2006-11-22
Anticipated expiration: 2015-09-01

Abstract

The utility model relates to a small size power supply module, which comprises a plurality of power supply parts, fixing devices and stacked PCB boards, such as, a glass fiber substrate and a base board, wherein heat generation elements of the power supply parts, such as, switch tubes, etc., or elements needing constant maintenance are movably arranged on the base board through the fixing devices. Thus, as the parts are maintained or replaced, the secondary damage of the parts of the PCB boards can be prevented. Furthermore, the heat dissipation effect can be enhanced.

Description

Small-sized electric source module

[technical field]

The utility model relates to a kind of power module, particularly relates to a kind of small-sized power module.

[background technology]

The miniaturized electric source module is widely used in industrial production and sphere of life.Many electronic products all need low-voltage dc power supply, and small-sized transformer has just in time satisfied this point.Common electronic product in the life has all been installed the miniaturized electric source module such as television set.And switching mode voltage stabilizer is a kind of among the miniaturized electric source module, and is little with its power consumption, efficient is high, volume is little, in light weight and be subjected to extensive use.Its developing history of brief description.

The scientist Luo Na (G.H.Royer) of the U.S. at first succeeded in developing utilize magnetic core saturated and carried out self-oscillatory transistor DC converter nineteen fifty-five.After this, utilize the various forms of DC converter of this technology constantly to be developed and to emerge.Because the power transistor in the transistor DC converter is operated on off state, so the group number of the stabilized voltage power supply of making therefrom output is many, polarity is variable, efficient is high, volume is little, in light weight, thereby be widely used in space flight and military electronic equipment at that time.

Fig. 1 is the partial cross section figure of No. 02813149.5 disclosed switching type power supply assembly 200 of disclosed Chinese patent application on August 18th, 2004.This power supply module 200 comprises the ceramic substrate 12 with metal level 14,15, and several semiconductor device 13 are installed on the ceramic substrate 12 by lead-free solder 16.And in order to dispel the heat, whole power supply module 200 is installed on the heat radiation plate 17.The proposition of the prior art power supply module 200 is to cause slight crack for fear of the variation owing to high heat load on ceramic substrate 12.But in use the semiconductor device 13 that damages is checked or when changing, must under 220 ℃ of high temperature, spend scolders such as taking scolding tin for a long time apart, can cause the secondary damage of other parts on the ceramic substrate 12, difficult in maintenance; Make scolder, the expense height because use rare metal; Ceramic substrate 12 is frangible, and ceramic thermal resistance is big, semiconductor device 13 particularly switching tube be contained in ceramic substrate 12 be unfavorable for the heat radiation, rate of finished products is extremely low, and is difficult in maintenance.

[utility model content],

Be easy to cause the technical problem that the part secondary damages on the plate in order to overcome the prior art small-sized electric source module, the utility model provides a kind of and is installing, safeguarding or changing power supply unit and also can not cause the small-sized electric source module that the part secondary damages on the plate.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of small-sized electric source module is provided, comprise a plurality of power supply units, fixture, stacked pcb board for example ceramic substrate or fiber board, and base plate, described fixture is removably mounted at least one power supply unit on the base plate.

With respect to prior art, the beneficial effect of the utility model small-sized electric source module is: because the utility model is removably mounted on base plate rather than pcb board to power supply unit for example on the ceramic substrate with fixture, therefore can avoid when safeguarding or change power device, to pcb board for example other parts on the ceramic substrate cause secondary to damage.And removed for example thermal resistance of ceramic substrate of pcb board, power device directly is pressed on the negative, can improve radiating effect greatly.

[description of drawings]

Fig. 1 is the partial section of a kind of small-sized electric source module of prior art;

Fig. 2 is the three-dimensional assembly diagram of the utility model small-sized electric source module;

Fig. 3 is the three-dimensional explosive view of the utility model small-sized electric source module;

Fig. 4 is the assembling schematic diagram of the utility model small-sized electric source module.

[embodiment]

The basic principle of the utility model small-sized electric source module is: will originally all be installed in for example some power supply units on ceramic substrate or the fiber board of pcb board in the prior art small-sized electric source module, such as switching tube or converter etc., be installed on the beneath heat-radiating substrate of pcb board, and install removably; Because these power device spoilage height, therefore when safeguarding or change power device, can avoid to pcb board for example other parts on ceramic substrate or the fiber board cause secondary to damage, and strengthen radiating effect, improve reliability.

Below in conjunction with drawings and embodiments, and be that example further specifies the utility model with the switching mode voltage stabilizer.

Referring to Fig. 2, the utility model small-sized electric source module 300 comprises stacked rectangle pcb board 10 and base plate 20 up and down.The metal base plate 20 that described base plate 20 is tin-coated coppers has the cylinder terminal of erectting with the base plate insulation 21 around the base plate 20.Corresponding points have through hole 11 around the pcb board 10, and cylinder terminal 21 inserts through holes 11 and welded with fixedly pcb board 10 and base plate 20.

Pcb board 10 ad-hoc locations have a plurality of windows, and power supply unit 32 shapes that the shape of these windows is corresponding specific are to install these power supply units 32.One side of pcb board 10 possesses a breach, and two 31 of switching tubes are positioned at this breach.Being provided with heat conductive isolation sheet 50 between switching tube 31 and the base plate 20, is the silica gel sheet in the present embodiment.Switching tube 31 adopts a fixture 40 to be fixed on the base plate 20, and this fixture 40 is a pressing plate 41 and screw in the present embodiment, and screw comprises nut 42 and double-screw bolt 43.Screw passes the through hole on the

pressing plate

41, and 42 on nut is spun on double-screw bolt 43 1 ends, and then is screwed onto on the base plate 20.By rotary nut 42, can be pressed on pressing plate 41 on the described base plate 20 together with the switching tube 31 below it.In like manner, opposite spin nut 42 then can remove switching tube 31.

The gap edge of described pcb board 10 has semicircle solder joint 12, and the electrode of switching tube 31 outputs then is welded on this solder joint 12.

The assemble method of the utility model small-sized electric source module 300 comprises step:

A, at least one power supply unit is placed on the base plate 20;

B, employing one fixture 40 are removably mounted on this at least one power supply unit on the base plate 20.Described fixture 40 comprises a pressing plate 41 and screw, earlier pressing plate 41 is placed on this at least one power supply unit, passes pressing plate 41 with screw again pressing plate 41 is screwed onto on the base plate 20.Described fixture 40 can be to tighten up screw, clamp system or buckle.

C, connect this at least one power supply unit electrode to described pcb board 10.

In the practicality, during assembling the utility model small-sized electric source module 300, adopt following steps to carry out, consult Fig. 3 and Fig. 4 together:

One. each power supply unit 32 (not comprising switching tube 31) is installed in pcb board for example on ceramic substrate 10 precalculated positions;

Two. with 10 pairs of good base plates 20 of pcb board, the cylinder terminal 21 on the base plate 20 inserts the through hole around the pcb board 10, fixedly pcb board 10 and base plate 20;

Three. two switching tubes 31 are placed in base plate 20 corresponding pcb board 10 indentation, there, and this moment, the heat conductive isolation sheet 50 of this position laid;

Four. adopt fixture 40 that switching tube 31 is fixed on the base plate 20, specifically be to fix double-screw bolt 43 earlier on base plate 20, pressing plate 41 and nut 42 are placed on the switching tube 31, through hole on nut 42 and the pressing plate 41 is facing to double-screw bolt 43, and rotary nut 42 is pressed on switching tube 31 on the base plate 20 until pressing plate 41;

Five. the electrode that welds this switching tube 31 is to the semicircle solder joint 12 of described pcb board 10.

To sum up, the utility model was installed on the heat radiating metal base plate under pottery or the fiber pcb board being installed in caloric value is bigger on the pcb board 10 switching tube 31 in the prior art small-sized electric source module originally, and be to install removably, to the destruction of pcb board 10, and be easy to install when avoiding prior art to change the switching tube 31 of welded and installed; If the big switching tube 31 of caloric value is installed on the pcb board 10 by the mode of prior art, then because the thermal resistance of pcb board 10 is difficult to heat radiation greatly, by the utility model switching tube 31 is directly installed on mode on the metal base plate 20, then the heat that switching tube 31 can be sent is evacuated by metal base plate 20 rapidly, and radiating effect improves greatly.

The utility model can also adopt the detachable method that other are needed often to safeguard or the big element of caloric value is directly installed on the metal base plate 20; Described fixture 40 can also be mechanical fastening systems 40 such as clamp system or buckle.

Claims

1. small-sized electric source module comprises a plurality of power supply units, stacked pcb board and base plate, it is characterized in that: comprise fixture, at least one power supply unit is removably mounted on the base plate.

2. small-sized electric source module according to claim 1 is characterized in that: described fixture is to tighten up screw, clamp system or buckle.

3. small-sized electric source module according to claim 1 is characterized in that: described fixture comprises a pressing plate and screw; Screw passes pressing plate and is screwed onto on the base plate; Pressing plate is pressed on this at least one power supply unit on the described base plate.

4. small-sized electric source module according to claim 3 is characterized in that: described pcb board possesses a breach, and this at least one power supply unit is positioned at this breach; Described gap edge has solder joint, and the electrode of this at least one power supply unit is welded on this solder joint.

5. small-sized electric source module according to claim 4 is characterized in that: described at least one power supply unit is a switching tube; Described base plate is a metab; Be provided with heat conductive isolation sheet between switching tube and the base plate.

6. small-sized electric source module according to claim 5 is characterized in that: described base plate has the cylinder terminal of erectting with the base plate insulation around being; Corresponding points have through hole around the described pcb board; The cylinder terminal inserts through hole and adds welding with fixedly pcb board and base plate.