JP4945223B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner including an expansion / contraction suction pipe in which one end of a first suction pipe is inserted into a second suction pipe so as to be movable back and forth within a predetermined range.

  Further, as a conventional vacuum cleaner, a dust collecting chamber, a vacuum cleaner main body that applies a suction negative pressure to the dust collecting chamber, and a dust collector connected to the vacuum cleaner main body so that one end portion thereof communicates with the dust collecting chamber. A dust hose, a hand-operated pipe provided at the other end of the dust collecting hose, an extension pipe (extension pipe) detachably connected to the hand-operated pipe, and a detachably connected to the extension pipe A canister type equipped with a suction port or the like is known (for example, see Patent Document 1).

  In addition, as a vacuum cleaner, a suction port is provided at the lower end of the vertical vacuum cleaner body, a hand-operated pipe is provided on the dust collecting hose connected to the dust collecting chamber of the vacuum cleaner body, and this hand-operated pipe is extended. There is also an upright type vacuum cleaner that connects a pipe and attaches this extension pipe to the vacuum cleaner body so that it can be attached and detached, and uses this extension pipe and the hand control pipe for the operation of the vacuum cleaner body. It is known (see, for example, Patent Document 2).

By the way, one end side of the first suction pipe (inner pipe) is inserted into the extension pipe of the vacuum cleaner so as to be movable within a predetermined range into the second suction pipe (outer pipe). An expansion / contraction suction pipe in which the suction pipe is connected to be extendable / contractible is also known (for example, see Patent Document 1).
JP 2004-8239 A Japanese Patent Laid-Open No. 2005-185584

  In such a telescopic suction pipe, a gap is formed between the outer peripheral surface of the first suction pipe and the inner peripheral surface of the second suction pipe, so that the sealing performance between the first and second suction pipes and the first It is desirable that the slidability during expansion / contraction between the second suction pipes can be ensured.

  Further, in the case of the telescopic suction pipe, when the extension pipe is placed vertically when the vacuum cleaner is stored vertically, the dust adhering to the inner peripheral surface of the second suction pipe is between the first and second suction pipes. When entering the gap, it is also conceivable that the expansion / contraction slidability between the first and second suction pipes deteriorates.

  Accordingly, the present invention can ensure the sealing performance between the first and second suction pipes and the sliding performance when the first and second suction pipes are expanded and contracted, and the dust attached to the inner peripheral surface of the second suction pipe. It aims at providing the vacuum cleaner provided with the expansion-contraction suction pipe which can prevent beforehand entering into the clearance gap between 1st, 2nd suction pipes.

In order to achieve this object, the present invention is provided with an expansion / contraction suction pipe in which one end portion of the upstream first suction pipe is inserted from one end portion of the second suction pipe on the downstream side so as to be movable forward and backward within a predetermined range. In addition, a seal member that secures airtightness between the first suction pipe and the first suction pipe is provided at one end of the second suction pipe, and the second suction is provided on an outer peripheral surface of the one end of the first suction pipe. It is characterized by having set it as the electric vacuum cleaner by which the bristle which slidably contacts the inner surface of a pipe was protrudingly provided.

  According to this configuration, when the first and second suction pipes are expanded and contracted, the first suction pipe while the bristle at one end of the first suction pipe smoothly slides with respect to the inner peripheral surface of the second suction pipe. One end of the pipe is supported on the inner peripheral surface of the second suction pipe, and dust adhering to the inner peripheral surface of the second suction pipe is absorbed by the brush bristles at the one end of the first suction pipe. It will prevent entry into the gap between the pipes.

  As a result, the sealing performance between the first and second suction pipes and the slidability when the first and second suction pipes expand and contract can be secured, and the dust attached to the inner peripheral surface of the second suction pipe is the first. , It can be prevented in advance from entering the gap between the second suction pipes.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
In FIG. 1, reference numeral 1 denotes a vacuum cleaner body of an upright type (vertical type) electric vacuum cleaner. The vacuum cleaner main body 1 has a main body case 2, and the main body case 2 has a front case 3 and a rear case 4. A pipe fitting hole 3 a that opens upward is formed at the upper end of the front case 3, and a container housing recess 5 that opens to the front and sides is formed at an intermediate portion in the vertical direction of the front case 3.

  A dust collecting container 6 is detachably mounted in the container housing recess 5. The dust collecting container 6 has a dust collecting chamber 6a, and the dust collecting chamber 6a communicates with a suction opening 9a of an electric blower 9 through a fine dust filter 8 such as a net filter 7 or a pleated filter. Thereby, the suction negative pressure of the electric blower 9 acts on the dust collection chamber 6 a via the fine dust filter 8 and the net filter 7.

  The net filter 7 and the fine dust filter 8 function as a bottom lid that closes the bottom of the dust collection chamber 6a during normal attachment and detachment, and can open the bottom of the dust collection chamber 6a downward when the dust is discarded. Is attached to the dust collecting container 6. As this opening / closing mechanism, a well-known structure can be adopted, and a detailed description thereof will be omitted.

  Further, a suction pipe 10 extending vertically is disposed in the main body case 2. The suction pipe 10 includes a lower suction pipe portion 11 and an upper suction pipe portion 12. The lower suction pipe 11 includes a front and rear pipe portion 11a extending in the front and rear direction, and a vertical pipe portion 11b bent downward from the rear end of the front and rear pipe portion 11a. The front ends of the front and rear pipe portions 11 a communicate with the dust collection chamber 6 a of the dust collection container 6 when the dust collection container 6 is mounted in the container storage recess 5.

Further, the lower end portion of the vertical pipe portion 11 b is fixed to the lower end portion of the main body case 2 and is opened at the lower end of the main body case 2. Furthermore, the lower end portion of the upper suction pipe portion 12 is connected to the vicinity of the front end portion of the front and rear pipe portions 11a.
(Suction port)
A suction port body 13 is disposed below the main body case 2. The suction port body 13 includes a suction port main body 14 and a connection pipe 15 that is attached to a rear edge portion of the suction port main body 14 so as to be able to tilt up and down. The connection pipe 15 is detachably fitted and connected to the lower end portion of the vertical pipe portion 11b.

  In addition, as shown in FIG. 2, a suction chamber 16 is formed in the suction port body 14, and a suction opening 16 a of the suction chamber 16 opens on the lower surface of the suction port body 14. The suction chamber 14 is communicated with the connection pipe 15 via the suction air passage 17.

Further, as shown in FIG. 2, the shutter 18 is integrally attached to the lower end portion of the connection pipe 21. The shutter 18 allows the suction air passage 17 and the connection pipe 15 to communicate with each other when the connection pipe 15 is inclined rearward, and interrupts the communication between the suction air passage 17 and the connection pipe 15 when the connection pipe 15 is raised. It is supposed to be.
(Extension pipe)
Further, as shown in FIG. 1, one end of a dust collecting hose 19 is connected to the upper suction pipe portion 12. A hand operating pipe 20 is connected and fixed to the other end of the dust collecting hose 19 as a hand operating section, and an extension pipe (expandable suction pipe) 21 that can be expanded and contracted is attached to the hand operating pipe 20. The extension pipe 21 has a large-diameter suction pipe (second suction pipe) 22 and a small-diameter suction pipe (first suction pipe) 23 as shown in FIG. Reference numeral 24 denotes a clearance nozzle 24.
<Large-diameter suction pipe 22>
As shown in FIG. 8, the large-diameter suction pipe 22 includes a large-diameter pipe portion 22a and a small-diameter pipe portion connected to the other end portion 22a2 opposite to the one end portion 22a1 of the large-diameter pipe portion 22a. 22b. The small-diameter pipe portion 22b is detachably fitted to the hand operation pipe 20 so that the large diameter suction pipe 22 is attached to the hand operation pipe 20 as shown in FIG.

  Further, as shown in FIG. 8, grooves 25, 25 extending to both ends are formed on the outer peripheral surface of the large-diameter pipe portion 22a at intervals in the circumferential direction, and the periphery between the grooves 25, 25 is formed. A bulging protrusion 26 extending to both ends in the longitudinal direction of the large-diameter pipe portion 22a is formed at the center in the direction. An engagement groove 27 is formed in the bulging protrusion 26. In this engagement groove 27, as shown in FIG. 4, a locking projection 27a is formed from a position close to the one end 22a1 of the large diameter pipe portion 22a toward the other end.

  Further, a boss 28 and an insertion hole 29 are formed at one end 26 a of the bulging protrusion 26. Further, projecting pieces 30, 30 are formed on both sides in the width direction so as to be close to the insertion hole 29, and shaft engaging notches 31, 31 are formed on the projecting pieces 30, 30. A shaft-like engagement protrusion 32 is formed on the other end 26 b side of the bulging protrusion 26.

  In FIG. 8, 33 is a lock body (lock member), and 34 is a lock release button for operating the lock body 33. The lock body 33 is inserted through the insertion hole 29 as shown in FIG. Further, as shown in FIG. 3, an engagement recess 33a is formed in the lock body 33, and the tip of the lever 34a integrated with the lock release button 34 is engaged with the engagement recess 33a.

On both sides of the lever 34a, as shown in FIG. 8, rotating shafts 35 (the other not shown) are formed. Then, by engaging the rotation shaft 35 (the other not shown) with the shaft engagement notches 31 and 31 in FIG. 8, the lock release button 34 causes the rotation shaft 35 (the other not shown) to be engaged. It can be rotated to the center. As shown in FIG. 3, a spring 36 is interposed between the lock release button 34 and the bulging protrusion 26.
<Cover>
Further, the bulging protrusion 26 is covered with a cover 37 as shown in FIGS. The cover 37 is formed with a screw insertion hole 38 and an insertion hole 39 as shown in FIGS. 4 and 8, and a cylinder fitted to the engagement protrusion 32 as shown in FIGS. A portion 40 is formed. The cover 37 is fixed to the large-diameter suction pipe 22 by screwing a screw 41 inserted through the screw insertion hole 38 into the boss 28 of the large-diameter suction pipe 22. In this state, the lock release button 34 protrudes from the insertion hole 39.
<Seal>
Further, a seal stop ring 42, a seal ring 43, and a seal pipe 44 are fitted in this order in one end portion 22a1 of the large-diameter pipe portion 22a. The seal stop ring 42 is formed with engagement protrusions 42a and 42a as shown in FIG. An engagement recess 42b is formed between the engagement protrusions 42a and 42a. As shown in FIG. 4, the engaging protrusion 42a is engaged with a locking protrusion 27a that protrudes in the large-diameter pipe portion 22a, that is, on the side of the engaging groove 27, and the seal stop ring 42 is large. The movement to the other end portion 22a2 side of the diameter pipe portion 22a is restricted.

Further, as shown in FIGS. 3 and 4, the seal pipe 44 is fixed in the one end portion 22 a 1 of the large-diameter pipe portion 22 a by a screw 41. The seal ring 43 is held (clamped) between the seal pipe 44 and the seal stop ring 42 so as not to move in the longitudinal direction of the seal pipe 44.
<Small-diameter suction pipe 23>
A stopper (protrusion) 45 is formed on the outer peripheral surface of the one end 23a of the small-diameter suction pipe 23 as shown in FIGS. The stopper 45 is engaged with the engagement groove 27 of the large-diameter suction pipe 22 as shown in FIG. The stopper 45 comes into contact with the engaging recess 42b between the engaging protrusions 42a and 42a described above, so that the small-diameter suction pipe 23 is prevented from coming out of the large-diameter suction pipe 22. Further, as shown in FIGS. 4 and 8, locking holes 46 and 47 are formed in the vicinity of the one end portion 23a and the intermediate portion of the outer peripheral surface of the small diameter suction pipe 23. Further, as shown in FIG. 4, the small-diameter suction pipe 23 has a locking hole 48 formed in the side portion of the one end portion 23a and a locking hole 49 formed in the lower portion of the one end portion 23a.

  The small-diameter suction pipe 23 is slidably fitted to the seal pipe 44, the seal ring 43, and the seal stop ring 42 as shown in FIG. 3, and the one end 23a moves forward and backward into the large-diameter suction pipe 22. It is inserted freely. The described skimmer nozzle 24 is detachably attached to the other end portion (outer end portion) of the small-diameter suction pipe 23.

  In FIG. 1, the other end side (outer end side) of the small-diameter suction pipe 23 is detachably fitted in a pipe fitting hole 3 a provided in the front case 3. In this state, the suction port body 13 can be moved back and forth by grasping the handle 20a of the hand operation pipe 20.

Further, the small-diameter suction pipe 23 is extracted from the pipe fitting hole 3a integrally with the clearance nozzle 24, while the connection pipe 15 of the suction port body 13 is erected and the communication between the suction air passage 17 and the connection pipe 15 is blocked by the shutter 18. Thus, the clearance nozzle 24 can be used. Reference numeral 2a denotes a handle for carrying the main body provided at the upper end of the main body case 2.
<Spacer>
Further, the large-diameter suction pipe 22 has a lateral diameter larger than the front-rear diameter when the handle 20a is directed forward in order to improve the appearance design. For this reason, a large gap 50 is formed between the small-diameter suction pipe 23 and the large-diameter suction pipe 22 as shown in FIGS.

  When the electric blower 9 is stopped by cleaning the wall or a narrow place by using the extension pipe 21 and the gap nozzle 24 provided with the suction pipes 22, 23, the sucked dust is relatively heavy such as sand. If dust or the like has moved into the large-diameter suction pipe 22, the dust may fall into the gap 50 and enter. Alternatively, when dust is attached to the inner peripheral surface of the large-diameter suction pipe 22, the extension pipe 21 is fitted into the pipe fitting hole 3a of the cleaner body 2, or the cleaner body 2 is moved in this state. It is also conceivable that dust attached to the inner peripheral surface of the large-diameter suction pipe 22 is peeled off and dropped due to vibration or the like when moving, and this dust enters the gap 50.

  In order to prevent this, as shown in FIG. 4, a spacer 51 is disposed on one end portion of the small-diameter suction pipe 23 (the end portion of the small-diameter suction pipe 23 in the large-diameter suction pipe 22) 23 a. As shown in FIGS. 9, 12, and 13, the spacer 51 has a circular inner peripheral surface 51a fitted to the one end portion 23a and a large-diameter pipe portion so as to fill the gap 50 in the portion of the one end portion 23a. The spacer side portions 51b and 51b are formed so as to be substantially U-shaped from the spacer side portions 51b and 51b which are formed thick up to the vicinity of the inner peripheral surface of 22a.

  The end portions of the spacer side portions 51b and 51b are formed with locking projections 52 and 52 that are detachably fitted into the locking holes 48 and 48 as shown in FIGS. A locking projection 53 that engages with the locking hole 49 is formed on the bottom of the surface 51a.

As shown in FIGS. 4 and 11 to 14, brush hairs 54 raised by flocking are provided on the outer peripheral surface of the spacer 51. As shown in FIGS. 4, 12, and 13, the brush bristles 54 are in contact with the inner peripheral surface of the large-diameter pipe portion 23 a so as to be capable of sliding movement.
[Action]
Next, the operation of the vacuum cleaner having such a configuration will be described.

  In this vacuum cleaner, when the electric blower 9 is operated by a switch (not shown), the suction negative pressure of the electric blower 9 acts on the dust collecting chamber 6 a via the fine dust filter 8 and the net filter 7. The suction negative pressure acts in the connection pipe 15 of the suction port body 13 via the lower suction pipe portion 11 of the suction pipe 10, and the front and rear pipe portions 11 a and the upper suction pipe portion 12 of the lower suction pipe portion 11. It acts on the clearance nozzle 24 via the dust hose 19, the hand operation pipe 20, and the extension pipe 21.

  By the way, when cleaning the cleaning surface using the suction port body 13, the other end side (outer end side) of the small-diameter suction pipe 23 is fitted in the pipe fitting hole 3 a provided in the front case 3. Used in. In this state, the small diameter suction pipe 23 is fitted in a pipe fitting hole 3 a provided in the front case 3 in an airtight manner. This airtightness can be achieved by providing a seal ring on the inner peripheral surface of the pipe fitting hole 3a or by attaching a seal ring to the outer peripheral surface of the small-diameter suction pipe 23.

  In this state, the suction port body 13 is moved back and forth by grasping the handle 20 a of the hand operation pipe 20. In connection with this moving operation, when the connection pipe 15 of the cleaner body 1 and the suction port body 13 is inclined backward, the suction air passage 17 and the connection pipe 15 communicate with each other.

  Accordingly, when the electric blower 9 is operated in this state, the suction negative pressure acting on the connection pipe 15 of the suction port body 13 acts on the suction chamber 16 via the suction air passage 17. As the suction port body 13 moves, dust on the cleaning surface is sucked into the suction chamber 16 together with air through the suction opening 16a.

  The dust and air sucked into the suction chamber 16 are sucked into the dust collection chamber 6 a of the dust collection container 6 through the suction air passage 17, the connection pipe 15, and the lower suction pipe portion 11. The sucked air passes through the net filter 7 and the fine dust filter 8. At this time, normal dust is collected by the net filter 7, and fine dust transmitted through the net filter 7 is collected by the fine dust filter 8. In addition, the air which permeate | transmitted the fine dust filter 8 is suck | inhaled by the electric blower 9, and after exhausting inside, it is exhausted outside.

  Moreover, when using the clearance nozzle 24, the connection pipe 15 of the cleaner main body 1 and the suction inlet 13 is made to stand, and the communication with the suction air path 17 and the connection pipe 15 is interrupted | blocked. On the other hand, the small-diameter suction pipe 23 of the extension pipe 21 is extracted from the pipe fitting hole 3 a together with the clearance nozzle 24. In FIG. 4, the lock body 33 is engaged with the locking hole 47, and the extension pipe 21 is in a contracted state.

  In this extension pipe 21, the lock release button 34 is pushed down against the spring force of the spring 36, the lock body 33 is pulled out from the locking hole 47 in FIG. 4, and the small diameter suction pipe 23 is pulled out from the large diameter suction pipe 22. To slide. Thereby, the extension pipe 21 including the large-diameter suction pipe 22 and the small-diameter suction pipe 23 extends. And if the lock body 33 is engaged with the locking hole 46 of FIG. 4, the extension pipe 21 will be in the state extended | stretched to the maximum.

  Further, by performing the reverse operation, the extension pipe 21 is reduced to the minimum. With such expansion and contraction, the bristle 54 of the spacer 51 slides on the inner peripheral surface of the large-diameter suction pipe 22, so that the one end portion 23 a of the small-diameter suction pipe 23 can move smoothly with respect to the large-diameter suction pipe 22. .

  Usually, the small diameter suction pipe 23 of the extension pipe 21 is extracted from the pipe fitting hole 3a, and the extension pipe 21 is used in an extended state. In this state, the electric blower 9 is operated, the suction negative pressure of the electric blower 9 is applied to the clearance nozzle 24, the handle 20a is gripped, and the clearance nozzle 24 cleans a wall or a narrow place.

  At this time, the dust and air sucked into the clearance nozzle 24 are passed through the extension pipe 21, the hand operation pipe 20, the dust collection hose 19, the upper suction pipe part 12, and the lower suction pipe part 11 through the front and rear pipe parts 11 a. Are sucked into the dust collection chamber 6a.

  The sucked air passes through the net filter 7 and the fine dust filter 8. At this time, normal dust is collected by the net filter 7, and fine dust transmitted through the net filter 7 is collected by the fine dust filter 8. In addition, the air which permeate | transmitted the fine dust filter 8 is suck | inhaled by the electric blower 9, and after exhausting inside, it is exhausted outside.

  After the cleaning by the clearance nozzle 24 is completed, the extension pipe 21 is reduced. At this time, dust adhering to the inner peripheral surface of the large-diameter pipe portion 22a other than the gap 50 is peeled off by the brush bristles 54 of the spacer 51 provided on the one end portion 23a of the small-diameter suction pipe 23. The brush hair 54 cannot enter the gap 50 side. With the extension pipe 21 being reduced in this manner, the small-diameter suction pipe 23 of the extension pipe 21 is fitted into the pipe fitting hole 3 a integrally with the clearance nozzle 24.

  At this time, even if dust adhering to the inner peripheral surface of the large-diameter pipe portion 22 a is located above the gap 50 of the extension pipe 21 and falls off, the spacer 51 and the brush bristles 54 bring the gap 50 into the gap 50 side. Cannot invade.

  As described above, in the vacuum cleaner according to the embodiment of the present invention, one end portion 23a of the first suction pipe (small-diameter suction pipe 23) is connected to the inside from one end portion 22a1 of the second suction pipe (large-diameter suction pipe 22). And a telescopic suction pipe 21 inserted in a predetermined range so as to be movable forward and backward. In addition, a seal member (seal ring 43) is provided at one end 22a1 of the second suction pipe (large diameter suction pipe 22) to ensure airtightness with the first suction pipe (small diameter suction pipe 23). In addition, brush bristles 54 projectingly contact the inner surface of the second suction pipe (large diameter suction pipe 22) are provided on the outer peripheral surface of the one end portion 23a of the first suction pipe (small diameter suction pipe 23).

  According to this configuration, when the first and second suction pipes (23, 22) are expanded and contracted, the brush bristles 54 at one end portion 23a of the first suction pipe (small diameter suction pipe 23) are connected to the second suction pipe (large diameter suction pipe). While smoothly sliding with respect to the inner peripheral surface of the pipe 22), the one end 23a of the first suction pipe (small-diameter suction pipe 23) is moved with respect to the inner peripheral surface of the second suction pipe (large-diameter suction pipe 22). The dust that adheres to the inner peripheral surface of the second suction pipe (large-diameter suction pipe 22) is supported by the brush bristles 54 at one end 23a of the first suction pipe (small-diameter suction pipe 23). This prevents entry into the gap 50 between (23, 22).

  As a result, the sealing performance between the first and second suction pipes (23, 22) and the slidability when the first and second suction pipes (23, 22) expand and contract can be secured, and the second suction pipe ( It is possible to prevent dust adhering to the inner peripheral surface of the large-diameter suction pipe 22) from entering the gap 50 between the first and second suction pipes (23, 22).

It is a side view of an upright type vacuum cleaner provided with the extension pipe which is an expansion-contraction suction pipe concerning this invention. It is sectional drawing of the connection part to the suction inlet body and vacuum cleaner main body of FIG. FIG. 2 is a cross-sectional view of the extension pipe of FIG. 1 cut in the longitudinal direction at a portion passing through a lock release button. FIG. 4 is an enlarged explanatory view of FIG. 3. FIG. 4 is an enlarged explanatory view of the seal structure of FIG. 3. It is sectional drawing which follows the A'-A 'line of FIG. FIG. 7 is an enlarged explanatory view of FIG. 6. It is a disassembled perspective view of the extension pipe of FIG. It is the perspective view which expanded and showed the principal part of FIG. It is an enlarged side view of the one end part of the small diameter suction pipe of FIG. It is the perspective view which looked at the one end part of the small diameter suction pipe of FIG. 10 from the end surface side. It is sectional drawing which follows the A2-A2 line | wire of FIG. It is sectional drawing which follows the A3-A3 line | wire of FIG. (A) is a perspective view of the spacer of FIG. 10, (b) is a left side view of the spacer of (a), (c) is a right side view of (b), and (d) is a plan view of (c). .

Explanation of symbols

22 ... Large-diameter suction pipe (second suction pipe)
22a1 ... one end 23 ... small diameter suction pipe (first suction pipe)
23a ... one end 43 ... seal ring (seal member)
54 ... Brush hair

Claims (1)

E Bei upstream first suction pipe telescopic suction pipe one end is inserted forward and backward movably within a predetermined range inside from one end of the second suction pipe on the downstream side of,
A seal member that secures airtightness between the second suction pipe and the first suction pipe is provided at one end of the second suction pipe, and an outer peripheral surface of the one end of the first suction pipe is provided with the second suction pipe. An electric vacuum cleaner characterized in that brush hairs slidingly contact the inner surface are provided.

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