JP3242013B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for fixing an extension pipe to a case body.

[0002]

2. Description of the Related Art Conventionally, as a vacuum cleaner of this type, for example, a structure described in Japanese Utility Model Application Laid-Open No. 63-39355 is known.

The vacuum cleaner described in Japanese Utility Model Laid-Open Publication No. 63-39355 has a suction opening which is open on the front side in the running direction of the cleaner body and connects one end of a hose. Attachment means having a claw portion which is detachably engaged with a concave portion which is located near the suction port and is formed toward the front of the main body of the cleaner and is detachably attached to the extension pipe connected to the other end of the hose. ing.
Then, with the rear portion of the cleaner main body placed on the floor in an upright position, the hook and the suction port body are connected and the claw portion of the mounting means is locked in the concave portion, so that the extension pipe is attached to the cleaner main body. Mount and support. In addition, a configuration is adopted in which the gripper provided at the front part of the cleaner main body is lifted, so that the cleaner main body can be transported in a state where the hose, the extension pipe, and the suction port are connected.

Further, a contact is provided near the suction port, and the contact and a control means provided in a circuit chamber for controlling the driving state of the electric blower are connected to a bumper which is wired outside the case body and also serves as a seal member. It is connected by the lead wire covered with. Further, a hand operation unit provided with a contact pin connected to a contact at one end of a hose connected to the suction port, and an operation unit electrically connected to the contact pin at the other end to set a driving state of the electric blower is provided. Provided.

[0005]

However, in the conventional vacuum cleaner described in Japanese Utility Model Laid-Open Publication No. 63-39355, the hose, the extension pipe, and the attachment means in which the total weight of the suction port body is attached to the extension pipe are used. Since the hook engages with the locking recess, a load may be generated in the vicinity of the recess and the case body may be damaged.

Further, the lead wire connecting the control means and the contact is routed from the circuit chamber to the vicinity of the suction port through the outside of the case body, and is sealed and covered with a bumper. For example, the lead wire is twisted. There is a problem that a gap is generated due to the wiring and the sealing performance is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and improves the strength of an engaging means for engaging and attaching an attaching means provided on an extension tube to prevent damage to a case body and without affecting sealing performance. An object of the present invention is to provide a vacuum cleaner capable of wiring lead wires.

[0008]

According to a first aspect of the present invention, there is provided an electric vacuum cleaner, comprising: an electric blower room accommodating an electric blower; a dust collection chamber located on a negative pressure side of the electric blower room; and a driving state of the electric blower. A case body having a suction port communicating with the dust collecting chamber, a contact disposed near the suction port, and a contact pin contacting the contact. An extension pipe connected to a hose having an end having an operation part for setting a driving state of the electric blower having one end connected to the suction port and electrically connected to the contact pin, the other end having A mounting means, a groove provided on the bottom surface of the case body in a concave shape facing downward and provided with a lead wire for connecting the control means in the circuit chamber and the contact, and a groove provided to close the groove. Locking the mounting means An engaging means, and is electrically connected to an operating section for setting a driving state of an electric blower provided in a holding portion of a hose in a groove provided in a concave shape facing downward on the bottom surface of the case body. A lead wire that connects the contact arranged near the suction port that contacts the contact pin by connecting the hose and the control means in the circuit room that controls the driving state of the electric blower is wired, and the groove is closed and the hose is closed. The mounting means provided on the extension pipe to be connected is fitted with the engaging means for attaching, so that the engaging means of another member prevents the case body from being damaged, and the lead wire is not wired to the sealing portion, which affects the sealing performance. It is wired without.

According to a second aspect of the present invention, in the vacuum cleaner of the first aspect, the lead wire is wired in the groove via the electric blower room, and is connected to the control means in the circuit room. Since the lead wire is wired in the groove through the electric blower chamber on the positive pressure side that houses the electric blower, the wiring is facilitated, and a separate sealing member is not required, thereby improving the productivity.

[0010] According to a third aspect of the present invention, in the vacuum cleaner of the first or second aspect, the engaging means is attached by a mounting member from inside the case body, and lead wires are wired. Since the engaging means for closing the groove is mounted from the inside of the case body by the mounting member, the wiring state is maintained without the engaging means being detached by mistake, and the appearance is improved without the mounting member facing the outside. .

According to a fourth aspect of the present invention, in the vacuum cleaner according to any one of the first to third aspects, the case body has a cover body covering the contact, and the engaging means is provided on the cover body. Since the engaging means is locked by the cover body covering the contacts, the number of structures for attaching the engaging means is reduced, and the fixing and assembling properties of the engaging means are improved. The performance is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vacuum cleaner according to the present invention will be described with reference to the drawings.

1 to 3, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 includes a lower case 2a having an open upper surface, and a case for closing a rear upper surface of the lower case 2a. And a main body case 2 which is joined to the periphery including the front surface by sandwiching the bumper 3 to open a front upper surface portion. The main case 2 has an opening at the front upper surface portion. The cover 4 is formed so as to be rotatably supported by a cover 4 that is openably and closably closed.

The main body case 2 is provided with a rotatable turning wheel (not shown) substantially at the center of the lower surface on the front side in the traveling direction, and a large-diameter driven rear wheel 6 as a running wheel is mounted on the rear side surface of the main body case 2. , 6 are rotatably provided, and the vacuum cleaner main body 1 can travel on a floor surface (not shown) by a turning wheel and driven rear wheels 6, 6. Further, a handle 7a rotatable in the vertical direction is provided at an upper portion of the main body case 2, and a front handle portion 7b is provided at a lower front portion of the main body case 2.

The rear surface of the upper case 2b, which is the upper rear portion of the main body case 2, and the upper rear surface of the lower case 2a, which is the lower rear portion of the main body case 2, are shown in a standing state with the rear surface of the main body case 2 as the lower surface. When the main body case 2 is placed on the floor surface, the mounting portion (not shown) contacting the floor surface with the driven rear wheels 6 and 6 projects rearward so that the rear surface of the main body case 2 is spaced from the floor surface by a predetermined gap. Has been established.

On the other hand, as shown in FIGS. 1, 5 and 6, the inside of the vacuum cleaner main body 1 is opened upward by a partition wall 12 which is a connecting rib as a partition rib having a grid-like communicating hole 11. The separated dust collection chamber 13 is formed on the front side in the traveling direction of the vacuum cleaner main body 1, and an electric blower chamber 15 containing the electric blower 14 is formed behind the dust collection chamber 13. . In the dust collecting chamber 13, a dust collecting bag 17 is detachably mounted by a holder 16 pivotally mounted in the dust collecting chamber 13.

On the front face of the partition 12, a first auxiliary dust filter 21 for covering the communication hole 11 is detachably mounted. The dust collecting bag 17 and the first auxiliary dust collecting filter 21
Is attached and detached through the upper opening of the dust collection chamber 13. And
The lid 4 has a rear end pivotally attached to the upper case 2b, and is formed to cover the dust collection chamber 13 so as to be openable and closable from above.

On the other hand, the electric blower 14 includes a motor unit 31 for driving a fan (not shown) to rotate around a shaft, and a fan cover 33 having an inlet 32 formed in the center of the front surface that covers the fan. A motor head 34 in which a bearing (not shown) for supporting the shaft is provided substantially in the center of the rear end face of the electric unit 31.
Is formed to project rearward in a columnar shape.

An annular rubber support 35 is fitted to the front end of the electric blower 14 at the outer peripheral edge of the front end, and a rubber buffer 36 is attached to the motor head 34 at the rear end. 34
It is attached to cover.

On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 37 protruding downward and positioning and fixing the fan cover 33 via the rubber support 35 without looseness, and an upper rib front portion Upper rib rear portions 38 projecting downward in a substantially parallel manner and projecting downward in a substantially parallel manner and having lower ends sandwiching and fixing the motor head 34 of the electric unit 31 via a buffer 36 are formed respectively. Also, on the upper surface of the lower case 2a, a lower rib front portion 39 protrudes upwardly toward the upper rib front portion 37 and fixes the fan cover 33 at the upper end portion without play, and a rear rib upper portion. Lower rib rear portions 40 projecting upward toward the upper surface 41 and having upper ends thereof for holding and fixing the motor head 34 of the electric unit 31 without looseness are formed to protrude.

The front end of the electric blower 14 is rubber-supported at its front end, and the air inlet 32 of the electric blower 14 is air-tightly connected to the dust collecting chamber 13 through the communication hole 11 so that the electric blower 14 is clamped and fixed. You.

A circuit room 42 is provided above the electric blower room 15.
In the circuit room 42, a circuit board (not shown) on which a control means for controlling the driving state of the electric blower 14 is mounted.

On the other hand, an exhaust chamber 44 is formed in the vacuum cleaner main body 1 behind the electric blower chamber 15, and an exhaust chamber 44 is formed in the rear upper portion of the upper case 2b of the vacuum cleaner main body 1. Room
An exhaust hole 45 communicating with an exhaust hole (not shown) of the electric blower 14 via 44 is formed at the rear and upper sides of the upper case 2b. In the exhaust chamber 44, a second auxiliary dust filter (not shown) is detachably provided.

A suction portion 47 for detachably connecting a hose (not shown) is provided substantially at the center of the front side of the main body case 2, and the suction portion 47 has an inner opening 48 and an outer opening 49 opposed to each other. Is formed. In addition, a cylindrical suction port 50 is formed in the middle facing the inner opening 48 and the outer opening 49. This suction port 50 has a vacuum cleaner body 1 at the front.
And a rear portion thereof opens to the dust collection chamber 13. Further, a shutter (not shown) that slidably closes the suction port 50 is slidably supported by the suction portion 47.

Further, as shown in FIG. 3, a contact fitting 52, which is located outside the suction port 50 and is a contact, is provided in the suction portion 47.
A cover body 53 is provided so as to open the suction port 50 and cover a part of the suction part 47 together with the contact fittings 52, 52.

Also, the lower case 2a is provided with the components shown in FIGS.
As shown in FIG. 6, a communication opening 55 is formed in the electric blower chamber 15 in the form of a concave groove that opens downward along the front-rear direction of the main body case 2 and is located at the front front of the bottom of the electric blower chamber 15. There is provided a groove portion 56 that communicates with the other. The groove 56 is provided with a screw hole 58 into which a screw 57 as an attachment member is inserted from inside the dust collecting chamber 13. Also,
An engaging member 60 made of a high-strength member such as acrylonitrile-butadiene-styrene (ABS) resin having an engaging concave portion 59 as an engaging means is attached to the groove 56. The engaging member 60 has an elongated plate-shaped closing plate 62 for closing the opening of the groove 56, and an opening 63 is formed on one side of the closing plate 62 in a concave shape along the longitudinal direction of the closing plate 62. Engaging recess 59 is provided integrally. Also, at both ends of the closing plate 62, a first locking claw portion 65 locked to the cover body 53 covering the suction portion 47 and an opening edge of a communication opening portion 55 communicating with the electric blower chamber 15 of the groove portion 56. A second locking claw portion 66 is locked and protruded. Further, the closing plate 62 is provided with a screw rib 67 which is located inside the engaging recess 59 and is screwed with a screw 57 inserted from the inside of the dust collecting chamber 13 corresponding to the screw hole 58 of the dust collecting chamber 13. It is protruding.

The engaging member 60 is provided with the first locking claw 65
Is locked to the cover body 53 and the second locking claw 66 is locked to the opening edge of the communication opening 55 communicating with the electric blower chamber 15 of the groove 56, and the wiring chamber 68 is closed by the closing plate 62. Partition and groove 56
The screw 57 is screwed and attached to the screw rib 67 from inside the dust collection chamber 13. 1 and 3, one end of the wiring chamber 68 is connected to a circuit board in the circuit chamber 42, and the other end is connected to the electric blower chamber 15 from the circuit chamber 42.
Cover body 53 through communication opening 55 and wiring chamber 68 in groove 56
Lead wires 69, 69 connected to the contact fittings 52, 52 covered with
Are wired.

On the other hand, in FIG. 2, reference numeral 71 denotes a hose, and the hose 71 has a hose portion 72 having flexibility.
At one end of the hose portion 72, a connecting portion having a contact pin (not shown) that is rotatably and detachably fitted to and fixed to the suction port 50 and is connected to the contact fittings 52, 52 disposed on the suction portion 47. 73 are provided. Also, at the other end of the hose section 72,
A plurality of switches (not shown) for setting driving such as an electric blower disposed in the vacuum cleaner main body 1 and a motor for rotatingly driving a rotary cleaning body (not shown) of the suction opening body 75 are electrically connected to the contact pins. A hand operation unit 76 as a grip unit provided with the operated operation unit is provided.

Reference numeral 80 denotes an extension pipe.
One end of the outer tube 81 is detachably connected to the hand operating portion 76 of the hose 71, and the other end of the outer tube 81 is connected to the other end of the outer tube 81 so that the suction port body 75 is detachably connected to the end. And an inner tube 83 having a portion 82. The connecting portion 82 of the inner tube 83 is integrally provided with a mounting means 85. The mounting means 85 has a neck 86 protruding substantially perpendicularly to the radial direction on the outer peripheral surface of the connecting portion 82, and protrudes in a claw shape on the distal end side along the axial direction of the inner tube 83 at the distal end of the neck 86. A locking projection 87 that is inserted into the engagement recess 59 from the opening 63 and locked.
have.

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

First, the electric blower 14 and the suction part 47 are respectively assembled to the lower case 2a, and lead wires 69, 69 connected to a circuit board (not shown) and having the contact metal fittings 52, 52 connected to the distal end thereof are connected to the electric blower chamber 15 by the electric fan. Through the communication opening 55
The contact fittings 52, 52 are disposed in the suction part 47. Then, the lower body is opened so that the cover body 53 opens the suction port 50 and covers the suction part 47 together with the contact fittings 52, 52.
Attach to the front of 2a.

Next, the first locking claw 65 of the engaging member 60 is locked to the cover body 53, and the second locking claw 66 is connected to the groove 56.
The wiring chamber 68 in which the lead wires 69, 69 are wired by the closing plate 62 while being locked to the opening edge of the communication opening 55 communicating with the electric blower chamber 15 of FIG.
And the groove 56 is closed, and the engaging member 60 is temporarily fixed to the lower case 2a. Thereafter, the screw 57 is screwed into the screw rib 67 of the engaging member 60 from the inside of the dust collecting chamber 13 via the screw hole 58, and the engaging member 60 is attached and fixed. Then, the upper case 2b and the lid 4 and the lower case 2a to which various members such as a circuit board are attached are assembled.
Are assembled to form the main body 1 of the vacuum cleaner.

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

During normal cleaning, the lid 4 is closed,
Power is supplied through a drawn power cord (not shown), and a hose is inserted into the suction port 50 that is opened by sliding the shutter.
The 71, the extension pipe 80, and the suction port body 75 are connected appropriately, and the supplied electric power drives the electric blower 14 and the electric motor of the rotary cleaning body of the suction port body 75 in a predetermined driving state to perform cleaning. As a result of this cleaning, dust is sucked together with air from the suction port 50 via the hose 71, guided to the dust collection chamber 13 of the vacuum cleaner main body 1, and captured in the dust collection bag 17.

Further, the air that has passed through the dust collecting bag 17
Electric blower from the communication hole 11 through the auxiliary dust collection filter 21
It is sucked into 14 inlets 32. Then, the air sucked from the intake port 32 of the electric blower 14 is exhausted from the exhaust hole (not shown) of the electric blower 14 into the exhaust chamber 44 through the inside of the electric blower 14. Further, the air flowing into the exhaust chamber 44 is
Then, the air is exhausted from the exhaust hole 45 to the outside air outside the vacuum cleaner main body 1 through the auxiliary dust collecting filter. By the circulation of the first auxiliary dust collection filter 21 and the second auxiliary dust collection filter, fine dust that could not be captured by the dust bag 17 is captured.

When the vacuum cleaner main body 1 is to be stored in the storage place after cleaning, the rear surface of the vacuum cleaner main body 1 is opposed to the floor surface and the floor portion is driven by the mounting portion and the driven rear wheels 6, 6. Place it on top to bring it to a standing position. Thereafter, the locking projection 87 of the mounting means 85 provided on the extension tube 80 is inserted into the opening 63 of the engagement recess 59 that opens upward, and is engaged in the engagement recess 59.
The extension tube 80 is attached to the vacuum cleaner main body 1 in a state where the axial direction is along the vertical direction. In addition, since the engagement recess 59 is provided to be offset to one side of the main body case 2, the extension tube 80 does not interfere with the turning wheel. Then, with the extension tube 80 attached, the user holds the front handle portion 7b of the vacuum cleaner main body 1 and transports it to the storage location.

During the transfer, for example, the hose 71 comes into contact with furniture, a wall, or the like, or the extension pipe 80 moves during the transfer. Even if a load is applied, the engagement recess 59 substantially reinforced by the engagement member 60 formed of a high-strength member separate from the main body case 2 is unlikely to be damaged. 2 is not damaged, only the engagement member 60 needs to be replaced, and maintenance is easy and inexpensive.

As described above, in the above-described embodiment, the electric blower 14 provided in the hand operating portion 76 of the hose 71 is provided in the groove portion 56 provided in a concave shape downward on the bottom surface of the lower case 2a of the main body case 2. Contact fittings 52, 52 disposed on a suction section 47 that are in contact with a contact pin electrically connected to an operation section for setting a driving state by connecting a hose 71, and a circuit chamber 42 for controlling the driving state of the electric blower 14. Lead wires 69, 69 are connected to the circuit board on which the control means are mounted, and the groove 56 is closed and the hose 71 is closed.
A separate engaging member 60 formed of a strong member having an engaging concave portion 59 having an engaging concave portion 59 provided for engaging an extension means 85 provided on an extension pipe 80 connected to the main body case 2 is attached to the main body case 2 and the separate member. The joining member 60 improves the strength of the engaging concave portion 59 that is locked by the mounting means 85, thereby preventing the engaging concave portion 59 from being damaged and the main body case 2 from being damaged. However, it is only necessary to replace the engagement member 59, and maintenance is easy and inexpensive.

Furthermore, since the engagement recess 59 for engaging the attachment means 85 is formed by using another engagement member 60, the lead wires 69 connecting the circuit board and the contact fittings 52 are covered. The lead wires 69, 69 can be blindfolded and protected without using a separate member, and the sealing performance is reduced by using a sealing member such as a bumper as in the related art, so that the sealing performance is not reduced. Wiring can be performed without affecting sealing performance.
The wiring of the lead wires 69, 69 becomes easy, and the manufacturability can be improved.

Further, moving members such as a drum chamber for accommodating a drum body around which a power supply cord is wound do not enter the room on the positive pressure side for accommodating the electric blower 14 from the circuit chamber, and lead wires 69, 69 are connected from the circuit chamber. 69, 69 can be wired without interfering with the moving members, and the electric blower can be
Since the wires 69, 69 for supplying power to the power supply 14 are wired in the groove 56 via the electric blower chamber 15 in which the power supply wires 69, 69 for supplying power are provided, the wires 69, 69 for supplying power can be wired together.
In addition to improving the wiring property, a member for maintaining the airtightness of a portion where the lead wires 69 and 69 are led out to the outside is not required, and the manufacturability can be improved.

Since the engaging member 60 is screwed into the screw rib 67 of the engaging member 60 through the screw hole 58 from the dust collecting chamber 13 inside the lower case 2a, the screw 57 is attached and fixed. Can be prevented from being accidentally removed, maintaining the wiring state and preventing the circuit configuration from being damaged.
57 can not be seen from the outside and can improve the appearance.

Further, the first locking claw 65 is locked to the engagement member 60 by the cover body 53 covering the contact fittings 52, 52, and the first locking claw 65 is locked to the edge of the communication opening 55 of the groove 56. 2 locking claws 66
Is provided so that the engaging member 60 can be easily assembled, and the engaging member 60 can be securely attached with one screw 57, and the fixing property and the assembling property of the engaging member 60 can be easily fixed. Is improved, and manufacturability can be improved.

Then, a separate engaging member 60 engages with the engaging recess.
Since the member 59 is provided, the member 59 can be formed of a high-strength member regardless of the member forming the main body case 2, and a structure for locking and attaching the attachment means 85 can be obtained at a high strength and at a low cost.

In the above embodiment, the first engaging claw portion 65, the second engaging claw portion 66, and the screw rib 67 to which the screw 57 is screwed are described, but these are not provided. Any other assembling method, such as mounting with an adhesive, is also possible.

In the above description, a concave engaging recess 59 is formed as an engaging means, and a locking projection 87 is provided on the mounting means 85 so as to protrude. Any locking mounting method can be used, such as forming the mounting means in a concave shape for engaging the engaging means.

[0046]

According to the vacuum cleaner of the first aspect, the operating portion for setting the driving state of the electric blower of the hose is provided in the groove formed in the bottom of the case body so as to be concave downward. A lead wire connecting the contact arranged near the suction port contacting the contact pin to be connected and the control means in the circuit chamber for controlling the driving state of the electric blower is wired, and the groove is closed and provided on the extension pipe. In order to attach the engaging means for attaching the attached attaching means, it is possible to prevent the case body from being damaged by the engaging means of another member, and the lead wire can be wired without affecting the sealing performance without the lead wire being wired to the seal portion, Manufacturability can be improved.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the electric blower chamber on the positive pressure side which houses the electric blower connected to the control means in the circuit room is provided. Since the lead wire is wired in the groove through the intermediary, the wiring can be easily performed, and a member for separately sealing is not required, so that the productivity can be improved.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, in addition to the effect of the vacuum cleaner, the engaging means for closing the groove where the lead wire is wired is provided by the mounting member. Because it is attached from the inside, it is possible to maintain the wiring state without the engaging means being removed accidentally,
The appearance can be improved without the mounting member facing the outside.

According to the vacuum cleaner of the fourth aspect, in addition to the effect of the vacuum cleaner of any one of the first to third aspects, since the engaging means is locked by the cover body covering the contacts,
The structure for attaching the engaging means can be reduced, and the fixing property and the assembling property of the engaging means can be improved, and the manufacturability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main body of a vacuum cleaner showing an embodiment of the vacuum cleaner of the present invention.

FIG. 2 is a partially cutaway side view showing the main body of the vacuum cleaner in which an extension pipe is locked and mounted by the mounting means.

FIG. 3 is a front view showing the main body of the electric vacuum cleaner.

FIG. 4 is a bottom view showing the upper and lower case.

FIG. 5 is a plan view of the same.

FIG. 6 is a sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Body case which is a case body 13 Dust collection room 14 Electric blower 15 Electric blower room 42 Circuit room 50 Suction port 52 Contact metal fittings 53 as a contact 53 Cover body 56 Groove 57 Screw as attachment member 59 Engaging means Engagement recess 69 Lead wire 71 Hose 76 Hand operation part which is gripping part 80 Extension tube 85 Mounting means

Claims (4)

(57) [Claims] 1. An electric blower room for housing an electric blower, a dust collection chamber located on the negative pressure side of the electric blower room, and a circuit room for accommodating control means for controlling a driving state of the electric blower, A case body having a suction port communicating with the dust collection chamber, a contact disposed near the suction port, and one end having a contact pin contacting the contact connected to the suction port, the contact pin Mounting means provided on an extension pipe connected to a hose having a gripping part at the other end, the gripping part having an operating part for setting a driving state of the electric blower electrically connected to the lower part of the case body, A groove in which a lead wire for connecting the control means in the circuit chamber and the contact point is provided in a concave shape facing the groove, and an engaging means provided to close the groove and to lock the mounting means. A telephone characterized by Vacuum cleaner. 2. The vacuum cleaner according to claim 1, wherein the lead wire is wired in the groove through the electric blower room. 3. The vacuum cleaner according to claim 1, wherein the engaging means is attached by an attachment member from inside the case body. 4. The vacuum cleaner according to claim 1, wherein the case body has a cover body that covers the contact, and the engaging means is locked by the cover body. .