JPH0436785Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dust collection amount display device for a vacuum cleaner that also has a protector function.

BACKGROUND ART Conventionally, dust collectors for vacuum cleaners of this type have generally had a configuration as shown in FIGS. 6 and 7, for example.

That is, a transparent pipe 1 with one end communicating with the negative pressure part of the vacuum cleaner and the other end communicating with the outside air, and a valve seat 2 attached to the outside air side end of the pipe 1 forming an air intake port. , a pointer 3 that slides within the pipe 1 according to the pressure difference between negative pressure and external pressure, and has notches 3a on both sides to form an air flow path;
A spring 4 that presses the pointer 3 toward the valve seat 2, an elbow 5 that communicates the pipe 1 with the negative pressure section of the main body, and a window 6.
It is composed of.

Problem to be Solved by the Invention However, in the above configuration, only the notches 3a on both sides of the pointer 3 are the main air flow path, so it is necessary to take a sufficient area to take in cooling air as an air protector. It was difficult.

In order to solve this problem, there is an idea to make the whole device larger to ensure an air flow path, but in this case, there are disadvantages of making the device larger and operation hysteria due to increased sliding resistance of the pointer. As he grew older, he had many problems.

Another possible solution is to expand the air flow path by providing notches on both sides of the pointer as well as on the bottom, but this may cause the pointer to become unbalanced as air flows out from three directions. As a result, the sliding resistance against the pipe increased, resulting in increased operational hysteria, similar to the previous example.

This invention solves the above conventional problems,
In addition to being small and ensuring sufficient air flow channels,
The purpose of the present invention is to realize a dust collection amount display device with less operational hysteria.

Means for Solving the Problems The means of the present invention for solving the above object is to form air flow channels with the same area on both sides and the bottom surface of the pointer, and furthermore, to form air flow channels with a smaller area than these air flow channels. is provided on the top surface.

Effect: By providing air channels in all four directions of the pointer, the sliding resistance between the pipe and the pointer is reduced, and the air channel on the top surface of the pointer is made smaller than the bottom surface of the pointer, thereby reducing upward force on the pointer. By generating this, the sliding resistance between the lower surface of the pointer and the pipe due to the weight of the pointer can be minimized. Therefore, it is possible to reduce the size of the device and to realize smooth pointer operation with little operational hysteria.

Embodiments Hereinafter, embodiments will be described with reference to the accompanying drawings.

In FIGS. 1 to 5, reference numeral 10 denotes a vacuum cleaner body, which has a fan motor 11 and a dust collection chamber 12 separated by a partition wall. Reference numeral 13 designates a transparent pipe, one of which communicates with the dust collection chamber 12, which is a negative pressure section, through an elastic elbow 14, and the other communicates with the outside air. A valve seat 15 is attached to the outside end of the pipe 13 and forms an air intake port 15a.
A pointer 17 slidably housed inside the pipe 13 is urged toward the valve seat 15 by a spring 16. If the pointer 17 moves in response to fluctuations in negative pressure, the pointer 1
7, the length of the visible portion of the display portion 15b of the valve seat 15 also changes. 17a is a side air flow path provided on both sides of the pointer 17; 17b is a bottom air flow path;
Reference numeral 7c denotes an upper air flow path having a small opening area provided on the display surface 17d on the upper surface of the pointer.

In the above configuration, when the inside of the dust collection chamber 12 is filled with dust etc., the negative pressure inside the dust collection chamber 12 increases.
The load of the spring 16 is overcome by this negative pressure, and the pointer 17 moves inside the pipe 13, which takes in outside air from the air intake port 15a and flows it to the fan motor 11, thereby preventing the fan motor 11 from overheating. By making the display section 15b of the valve seat 15 more visible, the user is informed of an abnormal condition such as the inside of the dust collection chamber 12 being full of dust. In addition,
When the pointer 17 is moving due to negative pressure, the outside air flowing in from the air intake port 15a is temporarily moved to the pointer 1.
After passing through the inside of 7, air flow paths 17a, 1 on all sides
7b and 17c, from the elbow 14 toward the fan motor 11. Since the upper surface air flow path 17c has a smaller flow path area than the lower surface air flow path 17b, the finger slant 17 receives an upward force, but this force becomes almost zero due to the load of the pointer 17 itself. Therefore, guideline 1
The sliding resistance between the pointer 7 and the pipe 13 can be kept small, and thereby the operational hysteria of the pointer 17 can be made small.

Effects of the Invention As is clear from the above explanation, in the present invention, the air flow path can be enlarged, so that miniaturization can be realized. Moreover, at the same time, it is possible to suppress the movement hysteria of the pointer to a small level and improve the movement performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an exploded perspective view, Figure 3 is a perspective view of the pointer, and Figure 4 is a perspective view of the pointer.
5 is an overall sectional view, FIG. 6 is a sectional view showing a conventional example, and FIG. 7 is a perspective view of the pointer. 10...Vacuum cleaner body, 13...Pipe, 15...
...Valve seat, 15a...Air intake, 16...Spring, 17...Pointer, 17a, 17b, 17c...
air flow path.

Claims (1)

[Scope of utility model registration request] A transparent pipe with one end communicating with the negative pressure part of the vacuum cleaner body and the other end with outside air, a valve seat attached to the outside air side end of this pipe and forming an air intake port, and a slider inside the pipe. A pointer which is movably internal and has a cylindrical shape and whose bottom surface on the spring side is closed and has cutouts on the upper, lower, left and right sides of the circumferential surface to form an air flow path, and a spring which urges the pointer toward the valve seat side. A dust collection amount display device for a vacuum cleaner, wherein the opening area of the upper air flow path on the circumferential surface of the pointer is smaller than that of others.