JPH0646652U - Vacuum cleaner suction body - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent malfunction of the traveling direction detection means. According to a signal from a traveling direction detecting means 36 provided in a suction port body 11, a control means controls an electric motor to control driving states of a rotating blade and traveling wheels. The traveling direction detecting means 36 is configured by connecting a rotating roller 55 that rotates in contact with the floor surface and a reflecting roller 54 that faces the photo sensor with a rotatable rotating shaft 48 and store them in a case body 40. An annular recess 68 is formed in the rotary shaft 48 at both sides of the rotary roller 55. [Effect] The thread waste entwined with the rotary shaft 48 can be wound around the annular recess 68 and stored. Since no thread waste is caught between the rotating roller 55 and the case body 40, the rotating roller 55 can be smoothly rotated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suction port body of an electric vacuum cleaner including a traveling direction detecting means having a rotating roller that rotates in contact with a surface to be cleaned.

[0002]

[Prior art]

 Conventionally, for example, a traveling direction detection means for detecting a traveling direction of the suction port body and outputting a signal to a suction port body having a rotating blade and a running wheel driven by an electric motor, and a traveling direction detection means There is known a suction port body of an electric vacuum cleaner including a control unit that controls an electric motor according to an output.

The traveling direction detecting means is rotatably attached to a case body provided with a detection chamber opened toward the surface to be cleaned and a closed sensor chamber, and a bearing portion formed on a side wall of the case body. And a rotation shaft that is pivotally supported. A rotary roller facing the surface to be cleaned is provided in the detection chamber, and a detection roller is provided in the sensor chamber, and the rotary roller and the detection roller are connected by the rotary shaft. . Further, in the sensor chamber, a non-contact type photo sensor which faces the detection roller at a slight distance and changes the output in response to the change in the reflection state of the surface due to the rotation of the detection roller is arranged. .

When the suction port body is moved on the surface to be cleaned, the rotary roller comes into contact with the surface to be cleaned and rotates together with the movement of the suction port body, and the rotary roller is attached to the rotary roller. The detection roller rotates and the output from the photo sensor changes. Then, based on the output from this photo sensor, the control means operates the electric motor in the forward and reverse directions, or stops it.

[0005]

[Problems to be solved by the device]

 In the suction inlet of the electric vacuum cleaner with the above-mentioned conventional structure, since the rotating roller is arranged in the detection chamber that opens toward the surface to be cleaned, the rotating shaft that supports this rotating roller is also exposed to the outside. Fibrous dust such as lint on the cleaning surface may become entangled with the rotating shaft. Then, when lint and the like are entangled with the rotating shaft, the lint is caught between the side wall of the detection chamber and the rotating roller, the rotating roller does not rotate smoothly, and the traveling direction detecting means malfunctions. Alternatively, it has a problem such as a failure.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a suction port body of an electric vacuum cleaner that can prevent malfunction or failure of the traveling direction detection means.

[0007]

[Means for Solving the Problems]

 The suction port body of the electric vacuum cleaner of the present invention comprises a suction port body having a suction port facing the surface to be cleaned, a forward / reverse rotatable electric motor disposed in the suction port body, The rotating body is rotated by the electric motor, and the advancing direction detecting means for detecting the advancing direction of the suction port body is provided. The control means is based on the advancing state of the suction port body detected by the advancing direction detecting means. An electric vacuum cleaner that controls driving of the electric motor by means of: the traveling direction detecting means; a case body that opens toward the surface to be cleaned; and a case body disposed inside the case body so as to face the surface to be cleaned. A rotary roller that is provided and is rotated by the movement of the suction port body in contact with the surface to be cleaned; and a rotary roller that supports the rotary roller and is rotatably supported by a bearing portion provided on the case body. Axle, the rotary roller and the front An annular recess formed in the peripheral surface of said rotary shaft is positioned between the bearing portion of the case body is obtained by including a sensor for detecting a rotational state of the rotary shaft.

[0008]

[Action]

 In the suction port body of the electric vacuum cleaner of the present invention, the driving state of the electric motor is controlled based on the traveling state of the suction port body detected by the traveling direction detecting means, and the rotating state of the rotating body is controlled. Further, since an annular recess is formed on the peripheral surface of the rotary shaft between the rotary roller and the bearing portion of the case body in which the rotary roller is disposed, when cleaning, fibrous material such as yarn waste is formed. Even if dust is entangled with the rotating shaft that supports the rotating roller, the lint is wound around the annular recess having a small diameter and is stored in the annular recess. Therefore, the lint that is entangled in the rotating shaft does not get caught between the rotating roller and the case body and hinders the rotation of the rotating roller, so that the rotating roller rotates smoothly and the traveling direction detecting means malfunctions or fails. Is prevented and the state of progress of the suction port body is accurately detected.

[0009]

【Example】

 Hereinafter, an embodiment of a suction port of an electric vacuum cleaner according to the present invention will be described with reference to the drawings.

In FIG. 2 to FIG. 4, reference numeral 11 denotes a suction port main body, and the suction port main body 11 includes a lower main body case 12 and an upper main body case 13 coupled and fixed to an upper portion of the lower main body case 12 in a traveling direction. On the other hand, the lower main body case 12 is horizontally long, and the bottom plate portion 12a and the cover portion 12b are joined and fixed by screws 12c in order to prevent twisting and distortion. The suction port main body 11 has a horizontally elongated suction chamber 14 defined in the front side which is the forward direction side, and the suction chamber 14 which is formed in the central portion on the rear side which is the backward direction side. An air passage chamber 15 communicating with the air passage chamber 15 is partitioned and formed, and further, an electric motor chamber 16 and a control chamber 17 are formed on both sides of the air passage chamber 15 in the left-right direction. A suction port 19 of the suction chamber 14 is formed on the lower surface of the suction port body 11 facing the floor surface 18 as the surface to be swept.

A communication pipe 20 communicating with the suction chamber 14 through the air passage chamber 15 is attached to the center of the rear end of the suction port body 11 so as to be rotatable at a predetermined vertical angle. There is. At the front end of the communication pipe 20, there is provided a substantially tubular rotation shaft portion 21 having the left-right direction as the axial direction and the front side opened, and the rotation shaft portion 21 serves as an air passage. It is fitted to the inside of the chamber 15 so as to be rotatable, and communicates with the substantially central portion of the suction chamber 14 via the air passage chamber 15. On the other hand, the rear end portion of the communication pipe 20 projects rearward outward from the suction port body 11, and the front end portion of the connecting pipe 22 bent in a substantially V shape is rotatably fitted. . Then, a straight tubular extension pipe (not shown) is connected to the rear end of the connection pipe 22, and a bendable hose connected to a cleaner body (not shown) is connected to the extension pipe. .

In this way, the suction chamber 14 of the suction port body 11 communicates with the dust collection chamber of the cleaner body through the air passage chamber 15, the communication pipe 20, the connection pipe 22, the extension pipe, and the hose. There is.

A state in which a rotary blade 24 as a rotating body is rotatably supported in the suction chamber 14 at both longitudinal ends by bearings 25 provided at both longitudinal ends of the suction chamber 14. It is installed in. The rotary blade 24 is provided with a plurality of plate-shaped blade portions 24a made of rubber or the like protruding in a spiral shape, and the tip portion of the blade portion 24a has a flat shape such as between plates. It is provided in a state of slightly protruding downward from the suction port 19 so as not to come into contact with the floor surface 18 but to come into contact with the floor surface 18 having an uneven surface such as a carpet or tatami mat.

Further, on the rear side of the suction port 19, a pair of rectangular opening portions 26 on both sides that open toward the lower surface are formed, and face the respective opening portions 26, each of which serves as a rotating body. A traveling wheel 27 having a cylindrical shape is attached. The traveling wheels 27 are axially supported on both sides of the air duct chamber 15 via shafts 28, which are rotating shafts, and the outer peripheral surfaces of the traveling wheels 27 have a flat shape such as between plates. A state in which it slightly protrudes from the lower surface of the lower main body case 12 through each opening 26 so that it does not contact the floor surface 18 of the lower body case 18 and does not contact the floor surface 18 of the material such as carpet or tatami mat It is provided in.

Further, in the vicinity of both side ends of the front and rear part of the suction port main body 11, substantially cylindrical auxiliary wheels 29 are rotatably supported in a state of protruding from the lower surface of the lower main body case 12, respectively. The suction port main body 11 can be moved back and forth on the floor surface 18 by these auxiliary wheels 29.

Further, a plate-like seal lip 30 made of, for example, resin is attached to the lower front portion of the suction inlet main body 11 along the front side of the suction inlet 19 in a state of protruding toward the floor surface 18. The airtightness of the suction chamber 14 is improved, and, for example, the catchability of dust near the wall is improved.

Further, in the electric motor compartment 16, a forward / reverse rotatable electric motor 31 for rotating the rotary blade 24 and the traveling wheel 27 is disposed.

Pulleys 32, 33, 34 are axially attached to the output shaft of the electric motor 31, one end of the shaft 28 of the traveling wheel 27, and one end of the rotary blade 24, respectively. , 33, 34 are wound around the power transmission belt 35 so that the traveling wheel 27 rotates forward in the traveling direction and the rotary blade 24 rotates in the opposite direction. In addition, the output from the electric motor 31 is transmitted.

Further, in the control room 17, the traveling direction detecting means 36 for detecting the traveling direction and the detection signal output from the traveling direction detecting means 36 are judged and converted to control the drive of the electric motor 31. A control means 37 is provided.

The control means 37 is composed of a plurality of circuit boards 38, and these circuit boards 38 are connected to the traveling direction detection means 36 and the electric motor 31.

As shown in FIGS. 1, 2, and 5, the traveling direction detecting means 36 has a switch case body 40 having a substantially box shape as a case body having an opened lower surface. The switch case body 40 has side wall portions 41a formed on both side portions in the left-right direction, and a vertical partition wall portion 41b is formed substantially at the center, and the detection chambers are formed on both sides of the partition wall portion 41b. 42 and the sensor chamber 43 are formed as compartments, and the sensor chamber 43 has a lower surface closed by a case cover body 46 fixed by screws 45 to prevent dust from entering.

The switch case body 40 is rotatably supported by a metal-made substantially cylindrical rotation shaft 48 in a state of penetrating the detection chamber 42 and the sensor chamber 43 in the left-right direction. A bearing 50, which is substantially annular and has electrical conductivity, is rotatably fitted in a substantially central portion of the rotary shaft 48 in the longitudinal direction. The bearing 50 and the rotary shaft 48 near the bearing 50 are separated from each other by a partition wall. It is sandwiched in close contact with a bearing portion 51 formed between the lower end of the portion 41b and the upper end of one side of the case cover body 46, and the rotating shaft 48 is rotatably supported and the bearing 50 Thus, the sensor chamber 43 is sealed from the outside of the detection chamber 42 and the suction port body 11.

Further, one end portion 48 a of the rotary shaft 48 is rotatably supported by a bearing portion 52 formed at the contact portion between the side wall portion 41 a of the switch case body 40 and the case cover body 46 of the sensor chamber 43. In addition, the other end 48b of the rotary shaft 48 is rotatably supported by a bearing 53 formed between the side wall 41a of the switch case body 40 and the lower main body case 12.

In the vicinity of one end portion 48 a of the rotary shaft 48, a reflection roller 54 that constitutes a substantially cylindrical sensor is fitted and fixed and is housed in the sensor chamber 43. In the vicinity of the other end portion 48b of the rotary roller 55, a substantially cylindrical rotary roller 55 having a diameter larger than that of the reflection roller 54 is fitted and fixed and is disposed in the detection chamber 42.

On the outer peripheral surface of the reflection roller 54 housed in the sensor chamber 43, two annular detection surfaces 54a and 54b are formed along the axial direction, and each of the detection surfaces 54a and 54b is formed. In the state where they are offset from each other by 90 ° in the circumferential direction, a reflective surface having a high light ray reflectance and a non-reflective surface having a low light ray reflectance are formed over 180 ° in the circumferential direction. The reflection surfaces of the detection surfaces 54a and 54b of the reflection roller 54 are insert-molded with a resin (ABS resin) made of acrylonitrile, butadiene, and styrene, and the non-reflection surface is made of polycarbonate.

Further, the switch case body 40 is formed with a pair of fitting grooves 43a, 43a facing the sensor chamber 43 and facing each other with the up-down direction being the longitudinal direction, and these fitting grooves 43a, 43a. An attachment substrate 56 is fitted and fixed in the meantime so as to face the reflection roller 54. Then, on one surface side of the mounting substrate 56, non-contact type photosensors 57a and 57b are mounted so as to face the detection surfaces 54a and 54b of the reflection roller 54 and be spaced apart from each other. .

A connector 61 is attached to the other surface of the attachment substrate 56, and a ground wire 63, a plurality of signal wires 64 and 65, and a power supply wire for a DC power supply 10V are connected to the connector 61. 66 etc. are connected. The ground wire 63 is connected to the bearing 50, each circuit board 38 of the control means 37, and the like, and is also connected to the ground line after rectifying the commercial AC power supply. The signal lines 64 and 65 connect the photosensors 57a and 57b to the circuit boards 38 of the control means 37.

When the outer peripheral surface 55a contacts the floor surface 18, the rotating roller 55 is rotated in a direction according to the moving direction of the suction port body 11 along with the movement of the suction port body 11. The outer peripheral surface 55a of the lower main body case 12 slightly protrudes from the lower surface of the lower main body case 12, and the outer peripheral surface 55a is supported so as to be slightly separated from the flat floor surface 18.

The rotating roller 55 has irregularities formed on the outer peripheral surface 55a so as to reliably rotate even if the floor surface 18 is tatami mat or the like. It is supported so that the distance from the convex portion is 0.2 to 0.7 mm. Further, the rotary roller 55 is mounted in a state of being eccentric from the central axis of the rotary roller 55 by 0.1 to 0.3 mm.

As shown in FIG. 1 and FIG. 5, the position where the rotary shaft 48 is exposed in the detection chamber 42, that is, between the both side portions of the rotary roller 55 and the bearing portions 51, 53 on both sides is located. Then, a pair of annular recesses 68 on both sides is formed along the peripheral surface of the rotary shaft 48 in the portion exposed to the outside of the suction port body 11. Further, each annular recess 68 has a taper-shaped diameter dimension that decreases toward the rotation roller 55, and the diameter dimension is smallest in the portion close to the rotation roller 55.

The photosensors 57a and 57b are erroneously stopped because the reflection roller 54 is stopped with the vicinity of the boundary line between the reflection surface and the non-reflection surface of the reflection roller 54 facing the photosensors 57a and 57b. In order not to operate, a lightening portion (not shown) is formed inside the reflecting roller 54 or the rotating roller 55, and the lightening portion is located above and the reflection roller 54 is stopped. . Further, the lightening portion may be filled with a heavy substance such as lead or iron so that the lightening portion side is always located below, or a rotary roller having a large moment may be provided.

Next, the operation of the above embodiment will be described.

At the time of cleaning, the suction port body 11 is connected to a cleaner body (not shown) via a hose and an extension pipe. Next, the handle portion provided on the extension pipe side end of the hose is gripped and pushed back and forth, and the suction port body 11 is moved forward and backward while contacting the floor surface 18. In this state, the dust collection motor built into the cleaner body is operated to remove dust on the floor 18 from the suction port 19 of the suction port body 11, the suction chamber 14, the air duct chamber 15, and the communication. It can be captured in the dust collecting chamber of the cleaner body via the pipe 20, the connecting pipe 22, the extension pipe, and the hose.

Then, in this state, the traveling direction detecting means 36 detects the traveling state of the suction port main body 11 to control the driving states of the rotary blade 24 and each traveling wheel 27.

That is, when the suction port body 11 is placed on a flat floor surface 18 such as a tatami mat or a board, the outer peripheral surface 55a of the rotary roller 55 positioned at a slight distance from the floor surface 18 is , Does not come into contact with the floor surface 18. Therefore, even if the suction port body 11 is moved on the floor surface 18, the rotation roller 55 and the reflection roller 54 that rotates according to this rotation roller 55 do not rotate, and therefore the outputs from the photosensors 57a and 57b do not change. In this state, the control means 37 controls to stop the electric motor 31 and stops the rotary blades 24 and each traveling wheel 27.

When the suction port main body 11 is placed on the floor surface 18 such as a carpet on which the suction port main body 11 is slightly sinked, the outer peripheral surface 55 a of the rotating roller 55 comes into contact with the floor surface 18. Therefore, when the suction port main body 11 is moved on the floor surface 18, the rotating roller 55 and the reflection roller 54 rotate according to the moving direction and speed of the suction port main body 11, and the rotation of the reflection roller 54. The outputs from the photosensors 57a and 57b, which detect the direction and rotation speed, change. In this state, the control means 37 determines the detected signal and controls the electric motor 31 to rotate in a predetermined direction and rotation speed. By the rotation of the electric motor 31, the rotary blade 24 and each running wheel 27 are rotationally driven via the belt 35, and the rotary blade 24 efficiently scrapes dust from the floor surface, while the suction port main body 11 moves to the floor. It is designed to be self-propelled on surface 18.

When the suction port main body 11 moves from above the carpet to between the plates or stops due to interruption of cleaning and the rotation of the rotation roller 55 stops, the photosensors 57a and 57b are operated. The output does not change, and in this state, the control means 37 stops the electric motor 31 after a lapse of a certain time.

Further, according to the configuration of the above-described embodiment, the rotating shaft 48 is located in the exposed portion in the detection chamber 42, that is, between the both side portions of the rotating roller 55 and the bearing portions 51, 53 on both sides. Since a pair of annular recesses 68 on both sides are formed along the peripheral surface of the rotary shaft 48 in the exposed portion of the suction port main body 11, when cleaning, the thread is put in the detection chamber 42 in which the rotary roller 55 is arranged. Even if fibrous dust, such as dust, enters and is entangled with the rotary shaft 48 that supports the rotating roller 55, the yarn dust is wound around the annular recess 68 having a small diameter and is stored in the annular recess 68. It Therefore, the lint that is entangled with the rotating shaft 48 does not get caught between the rotating roller 55 and the side wall portion 41a or the partition wall portion 41b of the switch case body 40 and hinders the rotation of the rotating roller 55. It can be rotated smoothly. In this way, malfunction or failure of the traveling direction detection means 36 can be prevented, the traveling state of the suction port body 11 can be accurately detected, and the driving state of the electric motor 31 can be accurately controlled, and the rotating blades can be controlled. It is possible to prevent the 24 and the traveling wheels 27 from stopping.

In addition, since each annular recess 68 has a taper-shaped diametrical dimension that decreases toward the rotary roller 55, and the diametrical dimension is smallest in the portion that is close to the rotary roller 55, the rotary shaft 48 The thread waste that is entangled with each other is guided by the tapered surface of each annular recess 68 and collected near the rotary roller 55. Therefore, it is possible to effectively prevent the yarn waste that is entangled with the rotating shaft 48 and rotates together with the rotating shaft 48 from contacting the wall portions 41a and 41b on both sides, and to smoothly rotate the rotating roller 55.

Further, since the annular recess 68 of this embodiment can be formed by recessing the rotary shaft 48, the structure can be simplified and the traveling direction detecting means 36 can be constructed at low cost.

In the present embodiment, the bottom surface of each annular recess 68 of the rotary shaft 48 is formed in a tapered shape. However, the annular recess should be provided in a planar shape parallel to the axial direction of the rotary shaft 48. You can also

Further, although the photosensors 57a and 57b and the reflection roller 54 are used as the non-contact type sensor and the rotating member of the traveling direction detecting means 36, a photointerrupter or a magnetic sensor (Hall element) is also used. However, the same effect can be obtained.

The traveling direction detecting means 36 of the present embodiment is not limited to a canister type vacuum cleaner, but may be applied to an upright type in which the suction port body 11 is directly formed on the lower surface of the vacuum cleaner body. You can also

Further, a similar effect can be expected by using a rotating brush as the rotating body instead of the rotating blade 24.

[0045]

[Effect of device]

 According to the suction port body of the vacuum cleaner of the present invention, the rotation state of the electric motor can be controlled by controlling the rotation state of the electric motor based on the progress state of the suction port body detected by the traveling direction detection means. The annular recess is formed on the peripheral surface of the rotating shaft between the rotating roller and the bearing of the case body where the rotating roller is arranged. Even if dust is entangled with the rotating shaft that supports the rotating roller, this thread waste is wound around the annular recess having a small diameter dimension and stored in the annular recess. Therefore, the lint that is entangled with the rotating shaft does not get caught between the rotating roller and the case body and hinders the rotation of the rotating roller, and the rotating roller can be smoothly rotated. Therefore, it is possible to prevent malfunction or failure of the traveling direction detection means, accurately detect the traveling state of the suction port main body, accurately control the driving state of the electric motor, and prevent the rotating body from stopping. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of advancing direction detecting means showing an embodiment of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a plan view of a lower surface with a part of the suction port body cut out.

FIG. 3 is a plan view of an upper surface with a part of the suction port body cut out.

FIG. 4 is a sectional view of the suction port body of the above.

FIG. 5 is a plan sectional view of the traveling direction detecting means of the above.

[Explanation of symbols]

 11 Suction port main body 18 Floor surface to be cleaned 19 Suction port 24 Rotating blade as a rotating body 27 Traveling wheel as a rotating body 31 Electric motor 36 Travel direction detecting means 37 Control means 40 Switch case body as case body 48 Rotating shaft 51, 53 Bearings 54 Reflective roller that constitutes the sensor 55 Rotating rollers 57a and 57b Photo sensor that constitutes the sensor 68 Annular recess

Claims (1)

[Scope of utility model registration request] 1. A suction port body having a suction port that opens facing a surface to be cleaned, a forward / reverse rotatable electric motor disposed in the suction port body, and a rotating body rotated by the electric motor. An electric cleaning device that includes a traveling direction detection unit that detects a traveling direction of the suction port body, and controls the drive of the electric motor by the control unit based on the traveling state of the suction port body detected by the traveling direction detection unit. In the machine, the traveling direction detecting means includes a case body that opens toward the surface to be cleaned, and is disposed inside the case body so as to face the surface to be cleaned.
A rotary roller which is brought into contact with the surface to be cleaned and is rotated according to the movement of the suction port body; a rotary shaft which supports the rotary roller and is rotatably supported by a bearing portion provided on the case body; An electric device comprising: an annular recess formed between the rotating roller and a bearing portion of the case body and formed in a peripheral surface portion of the rotating shaft; and a sensor for detecting a rotating state of the rotating shaft. Vacuum cleaner suction body.