JPS646765Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vacuum cleaner that can use exhaust air as a blower.

Conventional structure and its problems Conventionally, in vacuum cleaners that have a dual exhaust structure of centralized and decentralized exhaust, the central exhaust port is usually blocked by a valve body, and when used as a blower, the hose connection pipe is connected to the central exhaust port. Many have a structure in which the normal exhaust path is blocked by the valve body by connecting to the valve body. In this case, the valve body has a rotating shaft, and this rotating shaft is generally rotatably fitted and held in a bearing hole formed in the main body case which is divided into two parts. In addition, in the above-mentioned centralized exhaust port, a semicircular hole is provided in each of the two main body cases to form the exhaust port, and these two main body cases are combined to form a circular hole. When the connecting pipe is inserted, the mating surfaces of these matching holes will open, reducing the exhaust pressure and causing the user to feel uneasy about the possibility of a malfunction due to exhaust gas leaking from the open part. A central exhaust port having a cylindrical hole shape that can be freely fitted with a hose connection pipe is provided as a separate part, and this central exhaust port is held together with the valve body by the main case which is divided into two parts. FIG. 1 shows this conventional example. 1a and 1b are the main body case, 2 is the valve body, 3
is a central exhaust port, and 4 is a spring body that urges the valve body 2 toward the side that closes the central exhaust port.

However, with such a configuration, multiple parts are assembled at once when assembling the main body case, which requires great care and effort. Because the hole and the fitting part of the above rotation shaft are hidden in the main body case,
It was difficult to find the center of the shaft and was extremely difficult to assemble. Also, to form a shaft hole in the main body case,
Since the main body case is a large component, it is difficult to prevent distortion such as shrinkage during molding, especially if it is a resin molded product.
Therefore, extremely high precision was required for parts machining. In addition, due to fine dust contained in the exhaust,
This had many problems, including the fact that the shaft hole was blocked and the rotation of the valve body became incomplete.

Purpose of the Invention The present invention provides a vacuum cleaner that solves these conventional problems, improves assembly efficiency, improves part workability, and eliminates malfunctions.

Composition of the Invention The vacuum cleaner of the present invention includes a central exhaust port that is hooked to the outside of a main body case that is divided into two parts, and a valve body that is attached to the central exhaust port so as to be openable and closable.
The valve body has a spring body that biases the valve body; The spring body is fitted into the bearing part from the opening part, and the shaft part supports the spring body, and the biasing force of the spring body is in the closing direction of the valve body, and the shaft part is placed on the opposite side of the bearing part from the opening part. It is set in the direction in which it is pressed. Therefore, due to the structure of the bearing of this valve body, the valve body, spring body, and central exhaust port can be temporarily assembled before being assembled into the main body case, so there is less care during assembly, and when it is inserted into the main body case, there is no need to worry. All you have to do is insert the temporarily assembled parts above, and there is no need to draw the center of the shaft. Moreover, since the rotating part is comprised within the range of small parts, the distortion in part processing is reduced in proportion to the size of the part, and the accuracy is not particularly noisy.Furthermore, since the bearing part is open on one side, fine This is intended to improve assemblability, improve part processability, and ensure reliable operation, as it is said that even if dust gets mixed in, there will be no problem with rotation.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 2 to 7, 5 is a main body case of the vacuum cleaner, and the front part thereof communicates with a dust collection case 7 having an air intake port 6 via a filter (not shown). An electric blower 8 and a cord winding device 9 are housed. Note that a rear moving wheel 10 and a handle 11 are provided on the lower side and the upper side of the main case 5, respectively, and a front moving wheel 12 and a handle section 13 are provided on the lower side and the upper side of the dust collection case 7, respectively. The main body case 5 and the dust collection case 7 can be attached and detached using a buckle 14. The main body case 5 is a right case 5a divided at the center plane.
It is constructed by combining the left case 5b and the left case 5b.

Furthermore, a mounting groove 16 for the central exhaust port 15 and a hooking rib 18 for the coil spring 17 are integrally formed in a part of the exhaust passage at the rear of the main body case 5.

19 is a valve body, 20 is a bearing portion integrally formed with the central exhaust port 15 and having one side open, and 21 is a coil spring 17 provided on the valve body 19.
22 is a rotation shaft of the valve body 19. 23 is a hose connection pipe, which is detachably fitted into the central exhaust port 15. Reference numeral 24 denotes a dispersion exhaust port, which releases exhaust gas through an air permeable filter 25.

To explain the operation in the above configuration, as shown in FIG. 3, during normal suction work of a vacuum cleaner, exhaust gas flows as shown by arrow c and is discharged to the outside of the main body case 5 through the filter 25 and the dispersed exhaust port 24. Ru.
When used as a blower, as shown in FIG. 4, by fitting the hose connection pipe 23 into the concentrated exhaust port 15, exhaust gas can be concentrated and guided into the hose as shown by arrow d. At this time, the valve body 19 prevents the exhaust gas from flowing toward the distributed exhaust port 24 . When the hose connection pipe 23 is removed, the valve body 19 returns to its original state as shown in FIG. 3 by the biasing force of the coil spring 17, and the central exhaust port 15 is closed.

When assembling this vacuum cleaner, first compress the coil spring 17 as shown in Fig. 5, insert it into the mounting shaft seat 21 of the valve body 19, and assemble it into the valve body 19. Insert the rotating shaft 22 from the open side of the bearing portion 20 of the central exhaust port 15 as shown in FIG. In this state, the temporarily assembled parts are temporarily assembled, and as shown in FIG.
6, and attach the coil spring 17 to the hooking rib 18.
After that, simply fit the left case 5b over the right case 5a and connect them to complete the assembly into the main body. At this time, coil spring 17
The rotation shaft 22 of the valve body 19 is normally held rotatably pressed against the bearing portion of the central exhaust port 15 by the biasing force, and the main body case 5 does not require precision.

Effects of the Invention As is clear from the above-mentioned embodiments, the vacuum cleaner of the present invention is particularly advantageous in that the vacuum cleaner of the present invention has a bearing for the rotating shaft of the valve body formed in a part of the central exhaust port, and a bearing part with one side open, and the main body case. By rotatably holding the parts between the parts, ease of assembly and machining of the parts are improved, and in addition, the reliability of operation can be ensured.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing how a valve body mounting device of a conventional vacuum cleaner is assembled into the main body case, Fig. 2 is a vertical sectional view showing the entire vacuum cleaner according to an embodiment of the present invention, and Fig. 3 The figure is a sectional view showing the operation of the valve body device, Fig. 4 is a sectional view showing the operation as a blower, and Fig. 5 is a sectional view showing the operation of the valve body device.
- FIG. 7 is a perspective view showing the flow of assembly work in the same embodiment. 5... Main body case, 15... Central exhaust port, 17
... Spring body (coil spring), 19 ... Valve body, 20
...Bearing section, 22 ... Rotating shaft.

Claims (1)

[Scope of utility model registration request] It has a central exhaust port that is clamped to the outside of the main body case that is divided into two, a valve body that is attached to the central exhaust port so that it can be opened and closed, and a spring that biases the valve body, The shaft portion of the valve body is formed in a central exhaust port and includes a bearing portion having an opening in a part of the peripheral wall;
It is formed on the valve body, is fitted into the bearing part through the opening, and has a shaft part that supports the spring body, and the biasing force of the spring body is in the closing direction of the valve body, and the shaft part is A vacuum cleaner set in a direction that pushes the bearing part toward the opposite side of the opening.