JP5673421B2 - Vacuum cleaner suction tool - Google Patents

Description

  The present invention relates to a vacuum cleaner suction tool.

  In a vacuum cleaner suction tool having an electric rotary brush inside, a safety device for automatically stopping the rotation of the rotary brush when the suction tool leaves the surface to be cleaned such as the floor surface. (For example, refer to Patent Document 1 and Patent Document 2). This safety device controls the operation of the motor that drives the rotation of the rotating brush by turning on / off the micro switch according to the operation of the detection unit that detects whether or not the suction tool is in contact with the surface to be cleaned. It is.

  The configuration of a conventional safety device having such a microswitch will be described with reference to FIGS. The safety device 11 includes a micro switch 13 that is turned on / off in conjunction with the vertical movement of an auxiliary roller that is provided on the bottom surface of the suction tool body so as to be movable up and down. The safety device 11 includes a microswitch fixing component 14, a microswitch retaining component 15, and a circuit board 16.

  The micro switch fixing component 14 includes a mounting surface 14a to which the micro switch 13 is mounted, and a fixing pin 14b protruding from the mounting surface 14a. The micro switch 13 is attached to the micro switch fixing component 14 by pressing the micro switch 13 against the mounted surface 14a from a predetermined mounting direction substantially perpendicular to the mounted surface 14a. At this time, the fixing pin 14 b of the microswitch fixing component 14 is fitted into the mounting hole of the microswitch 13.

  The micro switch retaining component 15 is provided with a retaining rib 15a projecting substantially vertically downward. After the micro switch 13 is attached to the micro switch fixing part 14, the groove 15c provided on the inner surface of the micro switch retaining part 15 is slid into the board of the circuit board 16 from the predetermined mounting direction, and the micro switch fixing part 14 When the attachment surface 14a and the joint surface 15d of the microswitch retaining component 15 are in contact with each other, the retaining rib 15a protrudes to prevent the microswitch 13 from being detached from the fixing pin 14b.

  A circuit board 16 is accommodated on the top surfaces of the microswitch fixing component 14 and the microswitch retaining component 15. The circuit board 16 is mounted with a circuit for controlling a motor that drives the rotation of the rotating brush by the operation of the microswitch 13.

Japanese Patent No. 4088482 Japanese Patent No. 4617558

  However, in the vacuum cleaner suction tool equipped with the conventional safety device having such a micro switch, the mounting direction of the micro switch 13 with respect to the micro switch fixing part 14 and the mounting direction of the micro switch retaining part 15 are the same. It is. For this reason, when the micro switch retaining component 15 is not pushed to the specified position, the retaining rib 15a cannot function to prevent the micro switch 13 from being displaced from the normal mounting position. There is a problem that there is. Further, when attaching the micro switch retaining component 15, there is also a problem that the mounting is difficult because the groove 15 c provided on the inner surface of the micro switch retaining component 15 is slid along the plate of the circuit board 16.

  The present invention was made to solve such a problem, and it is possible to easily arrange the microswitch at a proper mounting position at the time of assembling the safety device. A vacuum cleaner suction tool capable of preventing the micro switch of the safety device from shifting from the normal mounting position with a simple configuration.

The suction tool for a vacuum cleaner according to the present invention has a suction port provided on the bottom surface, and a suction tool body having an electric rotating brush inside, and whether the bottom surface of the suction tool body is grounded to the surface to be cleaned And a safety device that controls the operation of a motor that drives the rotation of the rotating brush by turning on / off a switch according to the operation of the detecting unit. The safety device includes a mounting surface on which one surface of the switch mounted at a normal position contacts, and a switch fixing component provided with a plate-like member substantially perpendicular to the mounting surface; A switch retaining part that is engaged with the switch fixing part from the opposite side of the switch that is attached to a regular position of the plate-like member, and has a predetermined mounting direction on the attached surface of the switch fixing part Almost flat And a fixing pin that fits into a mounting hole formed in the switch, and a through-hole that is provided in the switch retaining part and is formed in the plate-like member substantially perpendicular to the predetermined mounting direction. A retaining rib penetrating through the hole, and the through hole and the retaining rib are formed in the state where the mounting hole is fitted to the fixing pin and the switch is mounted at the normal position. The penetrating retaining rib is disposed so as to face the surface of the switch on the side opposite to the mounting surface, and the retaining rib is located on the plate-like member from the opposite side of the switch mounted at a normal position. a structure that will be penetrating the through hole.

In the vacuum cleaner suction tool according to the present invention, it is possible to easily dispose the microswitch at the proper mounting position when assembling the safety device, and there is an effect that the assemblability is good.
In addition, there is also an effect that the micro switch of the safety device can be prevented from shifting from the normal mounting position with a simple configuration.

It is a figure which shows the whole structure of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a perspective view of the suction tool main body which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state which removed the upper case of the suction tool main body which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state which removed the safety device from the lower case of the suction tool main body which concerns on Embodiment 1 of this invention. It is a perspective view which shows the external appearance of the safety device which concerns on Embodiment 1 of this invention. It is sectional drawing of the safety device which concerns on Embodiment 1 of this invention. It is sectional drawing of the safety device attached to the lower case which concerns on Embodiment 1 of this invention. It is a perspective view of the microswitch which the safety device concerning Embodiment 1 of this invention has. It is a perspective view of the microswitch fixed component which the safety device concerning Embodiment 1 of this invention has. It is a perspective view of the micro switch securing component which the safety device concerning Embodiment 1 of this invention has. It is a perspective view which shows the external appearance of the conventional safety device. It is a front view of the conventional safety device. It is sectional drawing of the conventional safety device.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
1 to 10 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram showing the overall configuration of the vacuum cleaner, FIG. 2 is a perspective view of the suction tool body, and FIG. 3 is an upper view of the suction tool body. FIG. 4 is a perspective view showing a state in which the safety device is removed from the lower case of the suction tool body, FIG. 5 is a perspective view showing the appearance of the safety device, and FIG. 6 is a sectional view of the safety device. 7 is a cross-sectional view of the safety device attached to the case, FIG. 8 is a perspective view of a micro switch included in the safety device, FIG. 9 is a perspective view of a micro switch fixing part included in the safety device, and FIG. It is a perspective view of the microswitch retaining component which has.

  In FIG. 1, 1 is a suction tool main body. On the bottom surface of the suction tool main body 1, a suction port 1a is provided for sucking air (dust-containing air) containing dust and dust on the surface to be cleaned such as the floor surface. One end of a hollow cylindrical suction pipe 2 is connected to the suction tool body 1. The other end of the suction pipe 2 is connected to one end of a flexible bellows-like hose 3 via a connection pipe that is bent in the middle.

  The other end of the hose 3 is connected to the cleaner body 4. In the cleaner body 4, there is provided a dust collecting portion 4 a that captures and collects dust (dust) in the dust-containing air that has flowed into the interior from the outside of the cleaner body 4. And from the suction inlet 1a of the suction tool main body 1 to the dust collecting part 4a of the cleaner main body 4 is connected via the suction pipe 2 and the hose 3, and the suction tool main body 1, the suction pipe 2 and the hose 3 are included. A suction path for allowing dust air to flow from the outside to the inside of the cleaner body 4 is configured.

  The vacuum cleaner body 4 includes an electric blower 4b. This electric blower 4b is for driving a suction operation for sucking dust-containing air from the suction port 1a of the suction tool body 1 to the dust collecting part 4a of the cleaner body 4 via the suction pipe 2 and the hose 3. It is. On the other end side of the suction pipe 2, there is provided a grip portion 5 in which an operation switch for controlling the operation of the cleaner body 4 is arranged. The user of the electric vacuum cleaner pulls the vacuum cleaner body 4 by holding the grip portion 5 in use.

  FIG. 2 shows the appearance of the suction tool body 1. The suction tool main body 1 has a case part configured by combining an upper case 6 and a lower case 7 and an elbow joint 8 connected to the rear side of the case part. The suction tool body 1 is detachably connected to the suction pipe 2 via an elbow joint 8. The elbow joint 8 is attached to the case portion so as to be tiltable at a predetermined angle in the vertical direction, and further has a structure that is rotatable about an axis orthogonal to the tilt axis. ing.

  FIG. 3 shows the inside of the suction tool main body 1 from which the upper case 6 is removed. A rotating brush 9 for scraping dust on the surface to be cleaned is rotatably provided near the front side in the case portion so as to face the suction port 1a. Further, the motor 10 is housed on one of the left and right sides on the rear side in the case part, and the safety device 11 is housed on the other side on the left and right side in the case part.

  The motor 10 is for driving the rotation of the rotary brush 9. The rotation of the motor 10 is transmitted to the rotating brush 9 via the timing belt 10a. The safety device 11 is for automatically stopping the rotation of the rotary brush 9 when the suction tool body 1 is separated from the surface to be cleaned. As shown in FIG. 4, the safety device 11 is attached to the safety device attachment portion 7 a of the lower case 7.

  FIGS. 5 and 6 show the safety device 11 and FIG. 7 shows a state where the safety device 11 is attached to the lower case 7 of the suction tool body 1. The safety device 11 includes a micro switch 13 that is turned on / off in conjunction with the vertical movement of an auxiliary roller 12 provided on the bottom surface of the suction tool body 1 so as to be movable up and down. The safety device 11 is housed in the microswitch fixing component 14 to which the microswitch 13 is fixed, the microswitch fixing component 15 attached to the upper surface side of the microswitch fixing component 14, and the microswitch fixing component 15. The circuit board 16 includes a cover part 17 that is covered from above the microswitch retaining part 15 in which the circuit board 16 is accommodated.

  As described above, the micro switch 13 is turned on / off according to the vertical movement of the auxiliary roller 12. Specifically, the auxiliary roller 12 is elastically biased by a spring so as to protrude downward from the bottom surface of the suction tool main body 1. When the bottom surface of the suction tool main body 1 is in contact with the surface to be cleaned, the auxiliary roller 12 is pushed upward against the urging force of the spring by the surface to be cleaned, and the auxiliary roller 12 moves upward. And if the bottom face of the suction tool main body 1 leaves | separates from a to-be-cleaned surface, the auxiliary roller 12 will move below with the urging | biasing force of a spring.

  The microswitch 13 includes a switch portion 13a that is pressed down by a mechanical mechanism that uses a lever that swings according to the vertical movement of the auxiliary roller 12. The microswitch 13 is provided with two mounting holes 13b used for mounting to the microswitch fixing component 14 (FIG. 8).

  The microswitch fixing component 14 is shown in FIG. A fixing pin 14 b protrudes from the mounting surface 14 a of the microswitch 13 corresponding to the mounting hole 13 b of the microswitch 13. The micro switch 13 is attached to the micro switch fixing component 14 by pressing the micro switch 13 against the mounting surface 14a from a predetermined mounting direction substantially perpendicular to the mounting surface 14a of the micro switch fixing component 14. At this time, the microswitch 13 can be attached to the microswitch fixing component 14 in the proper position and orientation by fitting the fixing pin 14b of the microswitch fixing component 14 into the mounting hole 13b of the microswitch 13. it can.

  At predetermined positions on the upper surface of the micro switch fixing component 14, a retaining rib through hole 14c is formed. Since the mounted surface 14a is a surface that is substantially perpendicular to the upper surface of the microswitch fixing component 14, in other words, the through-hole 14c for the retaining rib is a plate-shaped member (substantially perpendicular to the mounted surface 14a The upper surface portion of the micro switch fixing component 14 is provided. The through-hole 14c for the retaining rib is located adjacent to the end of the microswitch 13 mounted on the fixing pin 14b in the normal position and orientation with the mounting hole 13b fitted on the side to be mounted 14a. Is arranged.

  FIG. 10 shows the microswitch retaining component 15. On the lower surface of the micro switch retaining part 15, a retaining rib 15 a protrudes substantially vertically downward. The microswitch retaining component 15 also serves as a housing portion for the circuit board 16. A container-like circuit board housing portion 15 b is provided on the upper surface of the microswitch retaining component 15, and the circuit board 16 is placed in the circuit board housing portion 15 b. Be contained. A circuit that controls the rotation of the motor 10 by the operation of the microswitch 13 is mounted on the circuit board 16, and is electrically connected to the motor 10 and the microswitch 13.

  The assembly procedure of the safety device 11 will be described with reference to FIGS. 5 to 7 again. First, the microswitch 13 is placed in the mounting hole 13b in a direction along a predetermined mounting direction, that is, substantially perpendicular to the mounting surface 14a of the microswitch fixing component 14 (in other words, substantially parallel to the fixing pin 14b). While fitting the fixing pin 14b, the micropin fixing part 14 is pushed in and attached.

Next, the microswitch retaining component 15 is combined with the upper surface of the microswitch fixing component 14 from above. At this time, the retaining rib 15a on the lower surface of the microswitch retaining component 15 is inserted into the retaining rib through hole 14c. As described above, the through-hole 14c for the retaining rib is disposed at a position adjacent to the end of the micro switch 13 attached to the micro switch fixing component 14 at the normal position and orientation on the side to be mounted 14a. Therefore, the retaining rib 15a penetrating the retaining rib through hole 14c is arranged along the surface of the microswitch 13 on the side opposite to the mounting surface 14a.

  That is, the retaining rib 15a is inserted into the retaining rib through hole 14c from a direction substantially orthogonal to a predetermined mounting direction, and faces the surface on the side opposite to the mounting surface 14a of the microswitch 13 mounted at a normal position. Therefore, the micro switch 13 is prevented from being displaced from the normal mounting position or from being removed from the fixing pin 14b.

  The retaining rib 15a has a tapered shape that becomes thinner toward the tip. Therefore, the retaining rib 15a can be easily inserted into the retaining rib through hole 14c, and the retaining rib 15a can be inserted into the retaining rib through hole even if the microswitch 13 is not completely fitted to the fixing pin 14b. The micro switch 13 can be pushed to the proper position by the action of the tapered slope of the retaining rib 15a by inserting it into 14c and pushing it downward of the micro switch retaining component 15.

  Then, after combining the microswitch retaining part 15 with the microswitch fixing part 14 to which the microswitch 13 is attached, the circuit board 16 is accommodated in the circuit board accommodating part 15b, and then the cover part 17 is attached. 5 is completed, and the completed safety device 11 is attached to the safety device mounting portion 7a of the lower case 7.

  Here, as shown in FIG. 6 and FIG. 7, the circuit board 16 is disposed between the microswitch fixing component 14 and the microswitch retaining component 15 in the event that heat is generated. You may make it provide the container-shaped metal case 18 which covers the outer side of 15. FIG.

  The vacuum cleaner suction tool configured as described above includes an auxiliary roller that is a detection unit that detects whether the bottom surface of the suction tool body is in contact with the surface to be cleaned, and the operation of the detection unit. A safety device that controls the operation of the motor that drives the rotation of the rotating brush by turning on and off the microswitch, and this safety device is attached to one surface of the microswitch that is mounted at a normal position A microswitch fixing component provided with a plate and a plate-like member substantially perpendicular to the mounting surface, and a microswitch retaining component engaged with the microswitch fixing component from the opposite mounting surface side of the plate-like member, Have.

  Then, a fixing pin that fits into a mounting hole formed in the micro switch is provided on the mounting surface of the micro switch fixing component so as to protrude substantially parallel to a predetermined mounting direction, and the predetermined mounting is performed on the micro switch retaining component. Protruding a retaining rib that penetrates the through-hole drilled in the plate-shaped member substantially perpendicular to the direction, and the through-hole and retaining rib are fitted with a fixing pin and a microswitch is In order to prevent the microswitch from being removed from the fixing pin, the retaining rib penetrating the through hole is disposed so as to face the surface of the microswitch opposite to the mounting surface.

  For this reason, when assembling the safety device, it is possible to easily arrange the microswitch at the proper mounting position, and the assemblability is good. Moreover, it is possible to reliably prevent the micro switch from being displaced from the normal mounting position with a simple configuration.

DESCRIPTION OF SYMBOLS 1 Suction tool main body 1a Suction port 2 Suction pipe 3 Hose 4 Vacuum cleaner main body 4a Dust collection part 4b Electric blower 5 Gripping part 6 Upper case 7 Lower case 7a Safety device attachment part 8 Elbow joint 9 Rotating brush 10 Motor 10a Timing belt 11 Safety Device 12 Auxiliary roller 13 Microswitch 13a Switch part 13b Mounting hole 14 Microswitch fixing part 14a Mounted surface 14b Fixing pin 14c Through hole for retaining rib 15 Microswitch retaining part 15a Stopping rib 15b Circuit board housing part 15c Groove 15d Joint surface 16 Circuit board 17 Cover parts 18 Metal case

Claims (4)

A suction port body provided with a suction port on the bottom, and an electric rotating brush inside,
A detection unit for detecting whether or not the bottom surface of the suction tool body is in contact with the surface to be cleaned;
A suction device for a vacuum cleaner comprising: a safety device that controls the operation of a motor that drives rotation of the rotary brush by turning on / off a switch according to the operation of the detection unit;
The safety device includes a switch mounting bracket which is substantially perpendicular plate-like member provided on the installation surface and the attached surface one surface of the switch mounted on the regular position abuts, said plate-shaped member, normal A switch retaining part engaged with the switch fixing part from the opposite side of the switch attached at the position of
A fixing pin that protrudes substantially parallel to a predetermined mounting direction on the mounted surface of the switch fixing component, and fits into a mounting hole formed in the switch;
A retaining rib projecting from the switch retaining component and penetrating through a through hole formed in the plate-like member substantially perpendicularly to the predetermined mounting direction;
The through-hole and the retaining rib are arranged so that the retaining rib penetrating the through-hole is the opposite of the switch when the mounting hole is fitted to the fixing pin and the switch is mounted at the normal position. Arranged so as to face the surface of the attached surface ,
The retaining rib, said plate-like member, for an electric vacuum cleaner suction tool according to claim Rukoto is penetrated into the through-hole from the opposite side of the switch mounted on the regular position.   The vacuum cleaner suction tool according to claim 1, wherein the retaining rib has a tapered shape that gradually becomes thinner toward a tip.   3. The circuit board housing part according to claim 1, wherein the switch retaining part has a circuit board housing portion for housing a circuit board on which a circuit for controlling the operation of the motor is controlled by turning on / off the switch. The vacuum cleaner suction tool described in 1.   The vacuum cleaner suction tool according to claim 3, further comprising a container-like metal case that is disposed between the switch fixing part and the switch retaining part and covers an outside of the switch retaining part.

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