JPH0442004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vacuum cleaner that can utilize exhaust gas as a blower.

Conventional structure and its problems Conventionally, in vacuum cleaners that have both a centralized and decentralized exhaust structure, the central exhaust port is usually closed by a valve body, and when used as a blower, the hose connection pipe is used for central exhaust. Many had a structure in which the normal exhaust path was shut off by a valve body by connecting to the opening. In this case, the valve body has a rotation axis,
This rotating shaft was generally rotatably held in a bearing hole formed in the main body case which was divided into two parts. Further, the central exhaust port had its mouth frame sandwiched between a main body case which was divided into two parts.

FIG. 9 shows this conventional example.

1a and 1b are main body cases divided into left and right halves, 2 is a valve body, 3 is a mouth frame forming a central exhaust port, 4 is a spring body that biases the valve body 2 in the direction of closing the central exhaust port, 5
is a fitting groove provided around the entire circumference of the mouth frame 3.

However, in this configuration, when assembling the main body, two operations are performed: the operation of inserting the mouth frame 3 into the main body cases 1a and 1b, and the operation of inserting the valve body 2, and finally the main body cases 1a and 1b are assembled. At the same time, it was necessary to do both at the same time, making assembly difficult. Also, mouth frame 3
When attempting to form a part by resin molding in order to form the fitting grooves 5 with the main body cases 1a and 1b, the mold is moved in three directions indicated by arrows c, d, and e as shown in Fig. 10. As a result, the mold has a complicated structure, resulting in high mold costs, which is reflected in the unit price of the parts, resulting in expensive parts.

OBJECTS OF THE INVENTION The present invention solves these conventional problems, improves assembly efficiency, improves part workability, and provides inexpensive parts.

Structure of the Invention The present invention comprises a main body case of a vacuum cleaner in which built-in parts such as an electric blower are sandwiched between a case divided into left and right halves, a distributed exhaust port and a centralized exhaust port formed in communication with an exhaust passage in the main body case, and A valve body is provided which selectively opens and closes the distributed/centralized exhaust port and is biased by a coil spring to close the central exhaust port, and the central exhaust port is connected to a cut formed by a dividing line on the rear surface of the main body case. The notch is provided with a claw part that receives a recess formed on the rear surface of the outer edge of the mouth frame, and the mouth frame is provided with a locking protrusion and a bearing part that are joined to the inner surface of the main body case. , and the bearing portion pivotally supports the rotating shaft of the valve body, and is open on the side that joins to the inner surface of the main body case.

Therefore, the valve body can be temporarily assembled to the mouth frame with the central exhaust port and then assembled to the main body case, and the mouth frame has no undercut-like part in the front and back direction and is made of resin molded in two parts. Molds can be used.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 8, 6 is a main body case of the vacuum cleaner, which is divided into two parts at the center and is composed of a right case 6a and a left case 6b.

The main body case 6 is connected at the front to a dust collection case 8 having an air intake port 7 via a filter (not shown), and an electric blower 9 and a power cord winding device 10 are housed inside. And main case 6
There is a rear moving wheel 11 below, and a handle 12 above.
A front moving wheel 13 is provided below the dust collecting case 8, and a handle portion 14 is provided above the dust collecting case 8, and the main body case 6 and the dust collecting case 8 can be attached and detached using a buckle 15. Further, a distributed exhaust port 26 is provided on the downstream side of the exhaust passage in the main body case 6, and a concentrated exhaust port 25 is provided on the upstream side.
5 and 26 are configured to be selectively opened and closed by a valve body 20. Normally, the valve body 20 is a coil spring 18
energized by the central exhaust port 25 to close it.
The concentrated exhaust port 25 is provided in the mouth frame 16 in the shape of a rectangular flat plate. This opening frame 16 is formed by a notch 6 formed from a dividing line on the rear surface of the main body case 6.
c and 6d. The cutouts 6c and 6d have claw portions 17 at the four corners of their inner edges,
On the other hand, the mouth frame 16 has recesses 28 into which these claws 17 fit. Further, the mouth frame 16 is formed with locking protrusions 29 that engage with the rear edges of the notches 6c and 6d in the main body case 6, respectively, and a pair of bearing parts 21 whose inner, upper, and front sides are open.

Therefore, the mouth frame 16 has the claw portion 17 and the recessed portion 28.
By the fitting and the engagement of the locking protrusion 29 with the rear edge of the main body case 6, the main body case 6 is securely attached.

The valve body 20 has a pair of rotation shafts 23 that are pivotally supported by the bearing portion 21 . The coil spring 18 is fitted and held in a mounting seat 24 protruding from the inside of the rotation shaft 23, and one end is engaged with the back surface of the valve body 20, and the other end is engaged with a hooking rib 19 of the main body case 6. There is.

When the hose connection pipe 22 is inserted into the central exhaust port 25, the valve body 20 is pushed open, and the distributed exhaust port 26 is opened.
The sides are closed. On the other hand, when the hose connection pipe 22 is removed, the central exhaust port 25 is closed by the valve body 20 and the exhaust gas is discharged from the distributed exhaust port 26 via the exhaust filter 27.

To explain the operation in the above configuration, as shown in Fig. 2, during the suction operation of a normal vacuum cleaner, the arrow f
Exhaust gas flows as shown in FIG. 2, passes through the exhaust filter 27 to the outside of the main body case 6, and is discharged from the distributed exhaust port 26. When used as a blower, the hose connection pipe 22 is connected to the central exhaust port 2 as shown in Figure 3.
5, the exhaust gas is concentrated and guided to the hose connection pipe 22 as shown by arrow g.
At this time, the exhaust gas is prevented from flowing toward the distributed exhaust port 26 by the valve body 20. Note that when the hose connection pipe 22 is removed, the valve body 20 returns to its original state as shown in FIG. 2 by the biasing force of the coil spring 18, and the central exhaust port 25 is closed.

When assembling this vacuum cleaner, first compress the coil spring 18, insert it into the coil spring mounting seat 24 of the valve body 20, and assemble it into the valve body 20, as shown in FIG. 4. Like, mouth frame 16
The rotation shaft 23 is inserted through the open opening of the bearing portion 21 . In this state, the temporarily assembled parts are temporarily assembled, and as shown in FIG.
9 is inserted so that it contacts the inner wall surface of the right case 6a, and the claw part 17 of the right case 6a is inserted into the recess 2 of the mouth frame 16.
8, and the coil spring 18 is connected to the hooking rib 19.
After that, simply fit the left case 6b over the right case 6a and connect them to complete the assembly into the main body. At this time, due to the bias of the coil spring 18, the rotation shaft 23 of the valve body 20 is usually pressed and held by the bearing portion 21 of the central exhaust port 16 so as to be freely rotatable.

Furthermore, when molding the mouth frame 16 with resin in this embodiment, the part can be extracted by simply moving the mold in a direction parallel to the direction in which the hose connection pipe 22 of the central exhaust port 25 is inserted, as shown in FIG. Therefore, the mold structure can be made simpler than the conventional example.

Effects of the Invention As described above, the valve body mounting device of the present invention has good assemblability without assembling a plurality of mating parts at the same time when assembling the main body. Since the direction is unidirectional, the mold structure is simple, the mold cost is low, and the mold cost is less reflected in the component unit price, making it possible to provide inexpensive parts.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a vacuum cleaner having a valve body mounting device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of essential parts showing an exhaust state when the vacuum cleaner is used for normal cleaning. Fig. 3 is a cross-sectional view of main parts showing the state of use of the exhaust when used as a blower, Figs. Figure 8 is a schematic cross-sectional view taken along the line hh--h showing an example of the moving direction of the mold when removing parts during mold forming. FIG. 10 is a perspective view showing a valve body mounting device for a vacuum cleaner in a state in the middle of assembly; FIG. 10 is a schematic diagram showing an example of the direction of movement of the mold when removing parts during mold molding of a central exhaust port part of the same device; . 6... Main body case, 16... Mouth frame, 17... Claw portion, 20... Valve body, 21... Bearing portion, 23... Rotating shaft, 25... Central exhaust port, 28... Recess, 29...
...Latching protrusion.

Claims (1)

[Claims] 1. The main body case of the vacuum cleaner, which has built-in parts such as an electric blower sandwiched between the left and right halves of the case, the dispersed exhaust port and the central exhaust port formed in communication with the exhaust passage in the main body case, and these distributed and central exhaust ports. a valve body that selectively opens and closes and is biased by a coil spring to close the central exhaust port; A claw portion is provided in the frame, and the notch has a claw portion that receives a recess formed on the rear surface of the outer edge of the mouth frame.
The mouth frame is provided with a locking protrusion and a bearing portion that join to the inner surface of the main body case, and the bearing portion supports the rotating shaft of the valve body, and the side that joins to the inner surface of the main body case is open. A vacuum cleaner characterized by: