JPH0729673Y2 - Power supply mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a power supply mounting structure in which components are surface-mounted on a metal substrate.

(Prior Art) Conventionally, as shown in FIG. 2, a metal substrate constituting a power supply main body is mounted with a case 5 on a metal substrate 1 to which terminals 2 are soldered, and a resin 6 is filled in the case 5 to mount a power supply. The terminal 2 was attached to the board 3 by soldering. Reference numeral 20 is a component which is surface-mounted on the metal substrate 1.

(Problems to be solved by the invention) However, in this conventional mounting structure, since the entire power source is filled with resin, the total weight is large, and further, the vibration applied to the metal substrate 1 and the case 5 from the outside is large. A force due to the impact or the like is applied to the soldering portion 4 of the terminal 2, which may cause deformation or peeling of the terminal 2. Therefore, there is a problem in that a power source with a larger output and a radiator having a relatively large weight cannot be attached to the metal substrate for use.

In view of the above problems, the present invention not only makes it possible to attach a radiator having a relatively large weight to a power supply,
An object of the present invention is to provide a power supply mounting structure in which there is no risk of breaking a metal substrate, the heat dissipation effect is large, the mounting strength of the radiator is increased, and the mounting and dismounting work of the radiator is facilitated.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a power supply mounting structure in which a metal substrate on which surface-mounted components are mounted and a resin case are combined to form a housing. Fix the root part of the metal spacer having screw holes to the metal board, bring the tip of the spacer into contact with one side of the power supply mounting board, and screw the tip of the spacer from the other side. The housing is fixed to the power supply mounting board by screwing the fixing tool into the hole, the radiator is arranged on the outer surface of the metal board, and the radiator is fixed to the screw hole of the base portion of the spacer through the radiator. It is characterized in that the radiator is mechanically and thermally joined to the metal substrate by screwing a tool.

(Operation) In the present invention, the vibration and shock applied to the power supply mounting board are transmitted to the radiator having a relatively large weight through the fixture and the spacer, but the radiator is mounted on the power supply by the fixture and the spacer. Since it is firmly fixed to the substrate, even if an inertial force due to vibration or shock is generated in the radiator, almost no force is directly applied to the fixed portion between the metal substrate and the spacer. Therefore, there is no possibility of breaking the spacer mounting portion of the metal substrate.

Further, since the heat of the metal substrate is directly transferred to the radiator, the heat radiation effect is large.

Further, since the spacer is fixed to the metal substrate, the radiator can be easily attached and detached even after the power source is assembled, and the entire power source does not come apart.

(Embodiment) FIG. 1 is a sectional view showing an embodiment of a power supply mounting structure according to the present invention. As described above, 1 is a metal substrate to which the surface mount component 20 is attached, 2 is a terminal, 3 is a power source mounting substrate, and the terminal 2 is mounted on the metal substrate 1 by the solder 4 as described above. 3 is also connected by solder 4. Reference numeral 5 denotes a resin case in which the metal substrate 1 is combined with the opening side to form a housing together with the metal substrate 1, and has a portion 6 for holding the terminal 2 and a hole 7 through which the terminal 2 is inserted. is there. The case 5 does not have to be a box-like shape in which only the metal substrate mounting portion is opened, and may have a lid body and a case.

Reference numeral 8 denotes a solderable metal spacer for attaching the metal substrate 1 to the power supply mounting substrate 3, and the spacer 8 is internally screwed so that a radiator 9 as an external component can be mounted. It has a hole 10. The base of the spacer 8 is fitted and fixed in a hole provided in the metal substrate 1 by caulking or the like. Instead of fitting, a screw hole may be provided in the metal substrate 1, and the end portion of the spacer 8 may be formed as a male screw and screwed to fix it. Since the spacer 8 also serves to connect the conductor 12 formed on the insulating layer 11 of the metal substrate 1 to the metal base 13 of the metal substrate 11, the spacer 8 is fixed to the conductor 12 by the solder 4. And is electrically connected.

In the metal board 1, the tip of the spacer 8 is inserted into the hole 14 of the case 5 and brought into contact with the surface around the hole 15 of the power supply mounting board 3,
A fixture 16 such as a screw or a bolt is inserted into the hole 15 and screwed into the screw hole 10 of the spacer 8 to fix it to the power supply mounting board 3. Further, a radiator 9 is provided on the outer surface of the metal substrate 1 on the opposite side of the substrate 3, and a fixing member 18 such as a screw or a bolt is inserted through a hole 17 provided in the plate surface of the metal substrate 1 to form a screw hole 10 in the spacer 8. It is attached to the metal substrate 1 so as to be in close contact with the metal substrate 1 by screwing and tightening, so that the radiator 9 is mechanically and thermally joined to the metal substrate 1.

In such a structure, the vibration or shock applied to the power supply mounting board 3 is transmitted to the radiator 9 having a relatively large weight through the fixtures 16 and 18 and the spacer 8, but the radiator 9 is used as the fixture. Since it is firmly fixed to the power supply mounting board 3 by the 16 and 18 and the spacer 8, even if an inertial force due to vibration or shock is generated in the radiator 9, the force directly applied to the fixed portion between the metal board 1 and the spacer 8. Is almost gone. Therefore, the spacer 8 of the metal substrate 1
There is no risk of damage to the mounting part. The effect of preventing the destruction of the mounting portion of the spacer 8 is achieved by firmly connecting the spacer 8 with screws or bolts. Further, as shown in the figure, by bringing the radiator 9 into contact with the end surface of the spacer 8, the impact or the like applied to the radiator 9 can be directly transmitted to the spacer 8, and thereby the metal substrate 1 is exposed. Unnecessary force transmission is alleviated, and the effect of preventing the metal substrate 1 from being destroyed is promoted. Moreover, since the heat of the metal substrate 1 is directly transferred to the radiator 9, the heat radiation effect is large.

Further, since the spacer 8 is fixed to the metal substrate 1, when the radiator 9 needs to be removed, the radiator 9 can be easily attached and detached, and the entire power supply does not come apart.

(Effect of the Invention) The power supply mounting structure according to the present invention mounts the power supply to the power supply mounting board by the fixing tool that is screwed to the spacer, and fixes the radiator to the metal board by the fixing tool that is screwed to the spacer. With this structure, when vibration or shock is applied to the power supply mounting board, almost no force is applied to the mounting part of the metal substrate, the destruction of the mounting part of the metal substrate is prevented, and a strong mounting structure of the metal substrate is realized. it can.

Further, since the radiator is attached by the fixing tool screwed to the spacer, the attachment strength of the radiator becomes large, and the radiator having a relatively large weight can be attached and used.

Moreover, since the spacer is also used as the mounting means of the radiator, a simple structure with a small number of parts is realized.

Further, since the heat of the metal substrate is directly transferred to the radiator, the heat radiation effect is large.

Further, since the spacer is fixed to the metal substrate, when it is necessary to remove the radiator, the radiator can be easily attached and detached, and the entire power supply does not come apart.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a power supply mounting structure according to the present invention, and FIG. 2 is a sectional view showing a conventional mounting structure.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography SHO 56-51281 (JP, U) RIE 60-130688 (JP, U) ACT 63-95296 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for a power source, which comprises a metal board to which surface-mounted components are mounted and a resin case in combination to form a housing, wherein a root part of a metal spacer having screw holes in the metal board. Affix and attach the tip of the spacer to one side of the power supply mounting board,
From the other surface side, a fixture is screwed into the screw hole at the tip of the spacer to fix the housing to the power supply mounting board, and a radiator is arranged on the outer surface of the metal board. A mounting structure for a power source, characterized in that the radiator is mechanically and thermally joined to the metal substrate by screwing a fixing tool into a screw hole at the root portion of the spacer.