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Centrifugal fan

A centrifugal fan and housing technology, applied in the direction of non-variable pumps, non-volume pumps, liquid fuel engines, etc., can solve the problem of checking the brazing state of the circuit board 132

Inactive Publication Date: 2021-02-09
MINEBEA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the centrifugal fan disclosed in Patent Document 1, the connector pins 162 and the wiring pattern of the circuit board 132 arranged on the bottom surface of the recess 141 of the lower case 140 are soldered. side) visual inspection of the soldering state is good or bad, but it is difficult to visually check the soldering state of the back side of the circuit board 132.

Method used

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  • Centrifugal fan
  • Centrifugal fan
  • Centrifugal fan

Examples

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Embodiment Construction

[0023] [1] Structure of Centrifugal Fan

[0024] figure 1 is a perspective view of a centrifugal fan 100 according to an embodiment of the present invention, figure 2 is a top view, image 3 It is a cross-sectional view including the center of the shaft 125 as the rotation axis. The centrifugal fan 100 includes a substantially disk-shaped casing 150 composed of an upper casing (first casing) 110 and a lower casing (second casing) 130 . In addition, in the description of the embodiment, descriptions of "upper" and "lower" added to constituent elements indicate image 3 The directions in the middle do not specify the posture of the centrifugal fan 100 in an actual device.

[0025] The upper case 110 is made of resin, and a suction port 111 is formed at the center thereof. In addition, substantially triangular-shaped flanges 112 protruding radially outward are formed at four places on the outer periphery of the upper case 110 . like figure 1 As shown, on the upper surface...

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PUM

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Abstract

The invention provides a centrifugal fan capable of visually inspecting the brazing state of the back side of a circuit substrate. The second housing (130) is provided with: a connector housing (190)having an opening (191) on the side thereof; and a connector pin (192) embedded inside, one end of the connector pin (192) protruding into the connector housing (190), the other end of the connector pin (192) passing through the circuit board (135) and being brazed to the circuit board (135), and weld legs (195a, 195b) being formed at corners formed by the connector pin (192) and the front and rear surfaces of the circuit board (135). A gap (139) is provided between the second case (130) and a portion of the circuit board (135) through which the connector pin (192) passes, and a through-hole (193) for visual confirmation is provided in the bottom wall portion of the second case (130), one opening (193d) of the through-hole for visual confirmation approaching the weld leg (195b) of the connector pin (192) and being transparent from the other opening (193e).

Description

technical field [0001] The present invention relates to a centrifugal fan, and in particular, to a centrifugal fan capable of visually confirming the quality of soldering on the back side of a circuit board when a connector pin is soldered to a circuit board. Background technique [0002] In the past, as such a centrifugal fan, for example, Japanese Patent Application Laid-Open No. 2018-200048 ( image 3 ) centrifugal fan. In this centrifugal fan, when the lower case 140 is molded, the connector housing 161 is formed by integral molding of resin at the same time. Connector pins 162 are attached to the inner side of the connector case 161 , and the connector pins 162 and the wiring pattern of the circuit board 132 arranged in the concave portion 141 of the lower case 140 are joined by soldering. [0003] Normally, the connector pins 162 are soldered to through holes formed in the circuit board 132 . The molten solder forms a fillet (front fillet) at the corner formed by the...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D17/16F04D25/08B23K1/00H05K13/08
CPCF04D29/4226F04D17/16F04D25/0693F04D25/08B23K1/0016H05K13/08H02K11/33H02K5/225H02K2211/03H02K7/14H02K21/22
Inventor 诸桥晴臣玉井功一津崎淳
Owner MINEBEA CO LTD