JPH04303408A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent a magnet from falling off of an indicator body. CONSTITUTION:One end of a tubular body 13 is adapted to communicate to the suction side of a motor fan. The other end of the tubular body 13 is opened to the atmosphere. An indicator body 17 moved according to the suction pressure is disposed in the tubular body 13. The indicator body 17 is provided on one side adjacent to the suction side with a holding part 30 and on the atmospheric side opposite to the suction side with an opened receiving space 19 in which a magnet 20 is pressfitted.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner equipped with a dust indicator.

0003

[Prior Art] As shown in FIG. 4, a vacuum cleaner has a vacuum cleaner body 1 which has a built-in dust collection chamber, an electric blower, etc., and a suction port 2 connected to the vacuum cleaner body 1 which communicates with the dust collection chamber. a hose 3, an extension pipe 4 connected to the tip of the hose 3,
A suction port body 5 is connected to the tip of the extension pipe 4.

[0004] During cleaning, dust is captured in a dust collection bag attached to the dust collection chamber. The degree of accumulation of dust in the dust collection bag can be confirmed by a dust indicator 6 provided at the top of the cleaner body 1.

FIG. 5 shows a conventional dust indicator 6. As shown in FIG. A window hole 12 is formed in an upper case 11 of a vacuum cleaner body 1, and a transparent cylindrical body 13 is horizontally disposed below the window hole 12. This cylindrical body 13 has a communication pipe 14 connected to one end thereof communicating with the suction side of the electric blower, and a valve seat 16 having an opening 15 communicating with the atmosphere at the other end.

A display body 17 that is movable in the axial direction of the cylinder body 13 and a spring 18 that biases the display body 17 toward the valve seat 16 are disposed within the cylinder body 13 . This display body 17 has a storage space 19 opened at the end face on the side of the communication tube 14, and a magnet 20 is press-fitted into the storage space 19.

Further, a board 21 is disposed below the cylindrical body 13, and a reed switch 22 is mounted on the board 21 at a position below the window hole 12, and when the reed switch 22 is turned on, A lamp 23 that lights up is mounted. Facing the top of this lamp 23, upper case 1
1 is formed with an opening 24, and a translucent display cover 25 is fitted into this opening 24.

When the electric blower is operated, the suction force of the electric blower acts on the display body 17 through the communication pipe 14 and the cylindrical body 13. At this time, when the amount of dust accumulated in the dust collection bag in the dust collection chamber is small, the suction force is small because the suction resistance of the air sucked from the suction port 2 is small, and when the amount of accumulated dust is large, the suction force is small. Since the suction resistance of the air suctioned from the suction port 2 increases, the suction force increases.

Therefore, when dust accumulates in the dust collection bag, the display 17 moves to the left in the figure against the force of the spring 18, and the display 17 becomes visible through the window hole 12. Furthermore, when the display body 17 moves, the display body 1
The magnet 20 of No. 7 comes close to the reed switch 22, and the reed switch 22 is turned on by the magnetic action of the magnet 20, and the lamp 23 is lit to indicate the clogging state of the dust collection bag, that is, the time to replace the dust collection bag.

0010

By the way, conventionally, the storage space 19 of the display body 17 is formed with an opening on the suction side.

[0011] Therefore, there is a risk that the magnet 20 fitted into the storage space 19 of the display body 17 may fall off due to the attractive force. In particular, recent electric blowers have a strong suction ability, and when the time to replace the dust collection bag approaches, the suction force acting on the display body 17 becomes excessive, so that the magnet 20 is likely to fall off. If the magnet 20 falls off, the lamp 23 will not light up even when it is time to replace the dust collection bag, making it impossible to confirm the time to replace it.

[0012] The present invention has been made in view of the above points, and an object of the present invention is to provide a vacuum cleaner that prevents a magnet attached to a display body that moves according to the suction force of an electric blower from falling off. It is something to do.

[Configuration of the invention]

[0014]

[Means for Solving the Problems] The present invention has a cylindrical body whose one end communicates with the suction side of an electric blower, and a magnet. The display body is provided with a display body disposed so as to be movable in a direction, and a reed switch provided corresponding to a predetermined movement position of the display body, and the display body is provided at an end portion corresponding to one end side of the cylinder body. A holding portion for holding the magnet is provided.

[0015]

[Operation] In the present invention, the display body moves in the axial direction within the cylinder in response to the suction force of the electric blower. When this display body moves to a predetermined position, a reed switch is turned on by the magnetic action of the magnet of the display body, and the degree of dust accumulation is displayed, for example, by a lamp or the like.

[0016] Furthermore, since a holding portion for holding the magnet is provided on one end of the display body facing the attraction side, the magnet is prevented from falling off from the display body due to the action of attraction force.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

It should be noted that structures that are the same as those shown in FIGS. 4 and 5 will be designated by the same reference numerals, and their description will be omitted.

As shown in FIG. 4, the vacuum cleaner has a vacuum cleaner main body 1 having a built-in dust collection chamber, an electric blower, etc., and a suction port 2 connected to the dust collection chamber of the vacuum cleaner main body 1. A hose 3, an extension pipe 4 connected to the distal end of the hose 3, and a suction port body 5 connected to the distal end of the extension pipe 4 are connected. A dust indicator 6 is attached to the top of this vacuum cleaner body 1.
is provided.

FIG. 1 shows the dust indicator 6. A window hole 12 is formed in an upper case 11 of a vacuum cleaner body 1, and a transparent cylindrical body 13 is horizontally disposed below the window hole 12. This cylindrical body 13 has a communication pipe 14 connected to the suction side between the dust collection chamber and the electric blower at one end, and a valve seat 16 having an opening 15 communicating with the atmosphere at the other end. There is.

A display body 17 that is movable in the axial direction of the cylinder body 13 and a spring 18 that biases the display body 17 toward the valve seat 16 are disposed within the cylinder body 13 .

As shown in FIGS. 2 and 3, this display body 17 has a storage space 19 formed in its end face on the valve seat 16 side, into which a rectangular magnet 20 is press-fitted, and a communication space 19. A holding portion 30 that holds the magnet 20 is formed on the end surface on the tube 14 side. A rib portion 31 is formed in the storage space 19 along the axial direction to hold the four surfaces of the magnet 20 in pressure contact. Further, a flange portion 32 is formed to protrude from the outer periphery of the end on the valve seat 16 side, and a plurality of rib portions 33 that protrude from the flange portion 32 in the radial direction are formed along the axial direction. The rib portion 33 comes into contact with the inner surface of the cylindrical body 13, guides the movement of the display body 17, and forms a predetermined ventilation gap between the rib portion 33 and the flange portion 32.

Further, a board 21 is disposed below the cylindrical body 13, and a reed switch 22 is mounted on the board 21 at a position below the window hole 12, and when the reed switch 22 is turned on, A lamp 23 that lights up is mounted. Facing the top of this lamp 23, upper case 1
1 is formed with an opening 24, and a translucent display cover 25 is fitted into this opening 24.

Next, the operation of this embodiment will be explained.

When the electric blower is operated, the suction force of the electric blower is applied to the display body 1 through the communication pipe 14 and the cylindrical body 13.
7. At this time, if the amount of dust accumulated in the dust collection bag of the dust collection chamber is small, the suction resistance of the air sucked from the suction port 2 is small, so the air flows from the suction port 2 well, and the display 17 The force acting on the display body 17 is small, and as more dust accumulates, the suction resistance of the air sucked from the suction port 2 increases, so the flow of air from the suction port 2 is poor, and the force acting on the display 17 decreases. increases.

Therefore, when dust accumulates in the dust collection bag, the display 17 moves to the left in the figure against the force of the spring 18, and the display 17 becomes visible through the window hole 12. Furthermore, when the display body 17 moves, the display body 1
The magnet 20 of No. 7 comes close to the reed switch 22, and the reed switch 22 is turned on by the magnetic action of the magnet 20, and the lamp 23 is lit to indicate the clogging state of the dust collection bag, that is, the time to replace the dust collection bag.

In the display body 17, a storage space 19 for storing the magnet 20 is formed as an opening on the atmosphere side opposite to the suction side, and a holding portion 30 for holding the magnet 20 is formed on the suction side. It is possible to prevent the magnet 20 from falling off from the display body 17 due to the action of the attractive force. Therefore, it is possible to reliably notify the user when it is time to replace the dust collection bag.

Furthermore, since the display body 17 holds the magnet 20 by the ribs 31, it is easy to assemble.

[0029]

[Effects of the Invention] According to the present invention, since the holding part for holding the magnet is provided on one end side of the display body facing the attraction side, it is possible to reliably prevent the magnet from falling off from the display body due to the action of attraction force. Can be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a dust indicator portion showing an embodiment of a vacuum cleaner of the present invention.

FIG. 2 is a perspective view of a display body.

FIG. 3 is an end view of the display body.

FIG. 4 is a perspective view of the vacuum cleaner.

FIG. 5 is a cross-sectional view of a conventional dust indicator portion.

[Explanation of symbols]

13 Cylindrical body 17 Display body 20 Magnet 22 Reed switch 30 Holding part

Claims (1)

[Claims] Claim 1: A cylindrical body having one end communicated with the suction side of an electric blower, and a magnet, which is disposed within the cylindrical body so as to be movable in the axial direction of the cylindrical body according to the suction pressure of the electric blower. The display body includes a display body and a reed switch provided corresponding to a predetermined movement position of the display body, and the display body has a holding part that holds the magnet at an end corresponding to one end side of the cylinder body. An electric vacuum cleaner characterized by: