BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of an air blower of the present invention;
FIG. 2 is an enlarged perspective view of the waterproof assembly of the present invention;
FIG. 3 is a partial exploded perspective view of the waterproof assembly showing that the tube is assembled with the motor casing;
FIG. 4 is a partial exploded perspective view showing that the circuit board is assembled on top of the frame;
FIG. 5 is a perspective view showing that the waterproof assembly is assembled; and
FIG. 6 is a cross sectional view showing the waterproof assembly prevents water from seeping into the motor casing.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to FIG. 1, it is noted that an air blower used in the market is generally composed of a motor casing (10), a motor (20) received in the motor casing (10), a blade (30) received in the motor casing (10) and operably connected to the motor (20) and a rear cover (40) connected to one side of the motor (10) to encase the motor (20) and the blade (30) to protect the motor (20) as well as the blade (30) from damage. The operation and the structural relationship among components are all conventional in the art. Thus the following focus lies on the structural relationship of the waterproof assembly to the air blower and effect that the waterproof assembly brings to the air blower.
With reference to FIG. 2, it is noted that the motor casing (10) of the air blower shown in FIG. 1 is hollow inside and has a through hole (11) defined through a periphery of the motor casing (10) to communicate with an interior of the motor casing (10), a frame (12) formed on the periphery defining the through hole (11) and having multiple securing holes (121) defined in the periphery defining the through hole (11) and enclosed by the frame (12) and positioning holes (122) defined in the periphery defining the through hole (11) and being outside the frame (12) and a tube (13) having a secondary seal (131), two extensions (132) respectively extending in a direction opposite to one another and a connection hole (133) defined in each of the extensions (132) to correspond to and align with the securing holes (121).
The two extensions (132) are formed on an outer periphery of a top portion of the tube (13) so that a bottom portion of the tube (13) is able to extend into the through hole (11) before the secondary seal (131) is placed around the periphery adjacent to the through hole (11). Thus the secondary seal (131) is sandwiched between the periphery of the motor casing (10) and the two extensions (132) of the tube (13).
With reference to FIG. 3, it is noted that the frame (12) further has a step (123) configured to support the primary seal (14). The circuit board (15) is provided with multiple contacting seats (151) and locking holes (152) formed on an outer periphery around the circuit board (15) to correspond to and align with the positioning holes (122) of the frame (12). Therefore, after the primary seal (14) is rested on the step (123) and the circuit board (15) is placed on top of the frame (12), locking elements such as countersunk bolts or the like are employed to securely engage the connection between the circuit board (15) and the frame (12), as shown in FIG. 4. In addition, screw holes (153) are defined in a portion of the circuit board (15).
It is to be noted that the circuit board (15) has multiple contacting seats (151) from which control wires (not shown) are extended to connect to the motor (20) (as shown in FIG. 1) and the power source to complete the entire circuitry. In order to protect the contacting seats (151) from damage caused by humidity, a cap (16) is provided and has multiple mating holes (161) formed around the cap (16) and multiple screw holes (153) are formed on the circuit board (15). After the mating holes (161) are aligned with the screw holes (153), locking elements such as countersunk bolts or the like are employed to securely engage the connection between the cap (16) and the circuit board (15).
With reference to FIGS. 5 and 6, it is noted that due to the provision of the primary seal (14) and the secondary seal (131), water is prevented from seeping into the motor casing (10) to cause damage to the electrical components inside the motor casing (10). Further, the cap (16) is able to prevent water from direct engagement with the contacting seats (152). Thus circuitry of the air blower is protected.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Application
20080075612
