JP2012024496A - Suction port body for vacuum cleaner and vacuum cleaner equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body capable of suppressing the generation of too large noise during cleaning because of a shutter and also capable of suppressing dust from getting stuck with the shutter.SOLUTION: The suction port body in which a connection pipe 35 turnable between a first position and a second position is secured to a suction head 12 and which is equipped with the shutter 46 turned in back and forth direction between a drawn-out position and a stored position in interlocking with the connection pipe includes engagement means 55, 56, a stopper 58, and holding means 61, 62. The engagement means 55, 56 interlock a backward rotation of the shutter 46 with a downward rotation of the connection pipe 35 when it moves from the first position to a third position between the first and second positions. The stopper 58 catches the shutter 46 and prevents the backward rotation thereof, and cancels the interlocking operation between the shutter 46 and the connection pipe 35 when the connection pipe 35 goes beyond the third position and turns downward. The holding means 61, 62 restrict the forward turning of the shutter 46 caught by the stopper 58, and cancels the restriction when the connection pipe 35 goes beyond the third position and turns toward the first position side to permit the forward rotation of the shutter 46.

Description

  Embodiments of the present invention relate to a vacuum cleaner suction port used for sucking and removing dust on a surface to be cleaned, and an electric vacuum cleaner that includes the suction port body to clean the surface to be cleaned.

  A connecting pipe communicating with the inside of the suction head is pivotally connected to the suction head. As the suction head is pushed and pulled back and forth through the connection pipe, the connection pipe protruding from the suction head rotates in the vertical direction. The floor suction inlet of a vacuum cleaner that is moved is common.

  In this suction port body, a shutter is rotatably provided between the connection pipe and the suction head, and when the connection pipe is turned downward, the upward opening is provided between the front end of the connection pipe and the suction head. A technique for preventing the formation of an opening with a shutter is conventionally known.

  In cleaning using the suction port body with the shutter, when the shutter is rotated in a direction to narrow the air path from the suction opening of the lower wall of the suction head to the inlet opened at the front end of the connection pipe, the suction is sucked. The relatively large dust in the dust-containing air is easily caught by the shutter inserted in the air passage, and the airflow passing through the air passage is greatly disturbed to cause excessive noise.

  Such improper movement of the shutter may be caused by friction with a connecting pipe that rotates in the vertical direction as the suction head is pushed and pulled in the front-rear direction, or sand that has entered the carpet. In order to increase the dust suction performance, it tends to be manifested when the general vacuum degree (0.4 KPa-0.7 KPa) of a vacuum cleaner is to be increased several times. That is, when the vacuum cleaner with a high degree of vacuum is configured as described above, the shutter arranged at the position where the upward opening between the front end portion of the connecting pipe and the suction head is closed is the suction head in the cleaning state. The high negative pressure inside increases the possibility of being drawn into the air passage from the suction opening to the inlet opening at the front end of the connecting pipe.

  On the other hand, even if the shutter is accommodated in the suction head, the shutter is accommodated in the suction head so as not to narrow the air path from the suction opening to the inlet opened at the front end of the connection pipe. It is possible to adopt a configuration in which the air passage is formed below the shutter in the state. However, in such a configuration in which the shutter is disposed so as to be out of the air path from the suction opening of the suction head to the inlet of the connection pipe, the air path is narrowed in advance unless the entire suction port body is made large. Since it has to be a structure, it is not preferable for dust absorption.

JP-A-11-155786

  In the embodiment, due to the shutter that closes the upward opening between the tip of the connection pipe and the suction head, excessive noise generation and suppression of narrowing of the air path in the suction head during cleaning are performed. An object of the present invention is to provide a suction port for a vacuum cleaner capable of suppressing dust from being caught on the shutter, and an electric vacuum cleaner including the same.

  In order to solve the above-described problem, the suction port for a vacuum cleaner according to the embodiment includes a suction head, a first position that is inverted with respect to the connecting portion of the head, and a second position that is continuous behind the connecting portion. And a suction port body provided with a shutter that interlocks with the rotation of the connection pipe, and includes an engaging means, a stopper, and a holding means. The shutter is provided so as to be pivotable in the front-rear direction over a drawing position that prevents an upward opening from being formed between the front end portion of the connection pipe and the suction head and a storage position that is disposed in the suction head. The engaging means is configured to interlock the backward rotation of the shutter with the downward rotation of the connection tube when the connection tube reaches the third position between the first and second positions from the first position. The stopper is configured to receive the shutter and prevent backward rotation of the shutter, thereby releasing the interlock when the connecting pipe rotates downward beyond the third position. The holding means restricts forward rotation of the shutter received by the stopper, and this restriction is released when the connecting pipe is rotated to the first position side beyond the third position to release the shutter. It is the structure which permits forward rotation of this.

It is a perspective view showing a vacuum cleaner provided with a suction mouth object concerning a 1st embodiment. It is a top view which shows the suction inlet provided with the vacuum cleaner of FIG. It is a bottom view which shows the suction inlet body of FIG. It is a side view which shows the suction inlet body of FIG. It is sectional drawing which follows the arrow F5-F5 line | wire in FIG. It is sectional drawing which shows the suction inlet body of FIG. 2 in the state by which the connecting pipe has been arrange | positioned in the 1st position. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which shows the suction inlet body of FIG. 2 in the state from which the shutter was pulled out. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which shows the suction inlet body of FIG. 2 in the state by which the connecting pipe has been arrange | positioned in the 3rd position. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which shows the suction inlet body of FIG. 2 in the state by which the connecting pipe has been arrange | positioned in the 2nd position. It is sectional drawing which expands and shows a part of FIG. It is a perspective view which decomposes | disassembles and shows the relationship between the connection part of the suction inlet body of FIG. 2, a connection pipe, and a shutter. It is a front view which shows the connecting pipe of the suction inlet body of FIG. It is sectional drawing which expands and shows the shutter periphery of the suction inlet body of FIG. It is a reverse view which shows the shutter of the suction inlet of FIG. It is a perspective view which shows the 1st rotation member with which the connection part of the suction inlet of FIG. 2 is provided. It is a top view which shows the 2nd rotation member with which the connection part of the suction inlet of FIG. 2 is provided. It is sectional drawing equivalent to FIG. 16 which shows a part of suction inlet body which concerns on 2nd Embodiment. It is a reverse view which shows the shutter of the suction inlet body of FIG. It is a surface view which shows the shutter of the suction inlet body of FIG.

  Hereinafter, the vacuum cleaner provided with the suction inlet of 1st Embodiment is demonstrated in detail with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates, for example, a canister type vacuum cleaner provided with a suction port body 11 according to the first embodiment. The electric vacuum cleaner 1 includes a vacuum cleaner body 2 and a dust suction air passage body 5. The vacuum cleaner 1 is set to a vacuum degree of, for example, 1.6 Kpa to 2.8 Kpa, specifically 2.0 Kpa, which is several times higher than that of the prior art, due to the capability of the electric blower 4 and the improvement of confidentiality of each part. Thus, when the carpet is cleaned, dust such as sand dust that has entered deeply into the root of the raised portion can be easily sucked out and cleaned.

  The electric blower 4 is built in the rear part of the cleaner body 2 to which the main body wheel 3 is attached. The front part of the vacuum cleaner main body 2 is on the upstream side of the electric blower 4, and a dust separation means (not shown) and a dust collection part for collecting dust separated by this means are provided on the front part. As the dust separation means, an inertia separation type dust separation device such as a cyclone type that separates dust and air using the inertial energy of the dust sucked into the dust separation means can be preferably used. Alternatively, it is also possible to use a dust separating means that uses a paper pack that separates coarse dust from air and a dust separation device that separates dust other than coarse dust from air by inertia separation.

  As shown in FIG. 1, the dust suction air passage body 5 includes a flexible dust suction hose 6, an extension pipe 7, and a suction port body 11.

  One end 6a of the dust suction hose 6 is detachably inserted into and connected to a dust suction port 2b of the cleaner body 2 on the upstream side of the electric blower 4. By this connection, the inside of the dust suction hose 6 and the dust separating means are communicated. The dust suction port 2b is provided, for example, on the opening / closing lid 2a provided on the upper surface of the front portion of the cleaner body 2. A handle 8 for moving and operating the suction port body 11 through the extension pipe 7 is provided at the other end (tip part) 6b of the dust suction hose 6 to which the extension pipe 7 is detachably fitted and connected. Yes. A hand switch 9 is attached to the handle 8 for instructing operation of the electric blower 4 and driving of a rotary cleaning body 71 described later.

  The extension pipe 7 is formed by combining, for example, an outer pipe 7a and an inner pipe 7b so as to be extendable and contractible. The outer tube 7a is detachably fitted to and connected to the other end 6b of the dust suction hose 6. A connecting pipe 35 of a suction port body 11 to be described later is detachably fitted to and connected to the tip 7c of the inner pipe 7b protruding from the other end (tip) of the outer pipe 7a.

  With the operation of the electric blower 4, dust-containing air sucked through a suction opening 17, which will be described later, opened on the lower surface of the suction port body 11 is connected to the suction port body 11, the extension pipe 7, and the dust suction hose 6. It passes in the order of description and is guided into the cleaner body 2 through the dust inlet 2b. As a result, air and dust are separated in the vacuum cleaner main body 2, and the dust is collected in the dust collecting part, while the air blown into the electric blower 4 and discharged from the electric blower 4 is removed from the vacuum cleaner main body. 2 is discharged to the outside of the vacuum cleaner main body 2 from an exhaust portion (not shown) provided at 2.

  Next, the suction inlet 11 will be described. As shown in FIG. 2, the suction port 11 has a substantially T shape in plan view, and is suitable for cleaning a surface to be cleaned such as carpet, tatami mat, flooring, etc. in a room to be cleaned. It is. As shown in FIGS. 2 to 6 and the like, the suction port body 11 includes a suction head 12, a connection pipe 35, a shutter 46, an engagement means, a stopper 58, a holding means and the like. At the same time, a rotary cleaning body 71, a driving device, a front wheel 76, a rear wheel 77 and the like are attached to the suction head 12 of the suction port body 11.

  As shown in FIG. 4, the suction head 12 includes an upper case 14, a lower case 16 that faces the surface to be cleaned, a connecting portion 21, and the like.

  The upper case 14 is made of synthetic resin and mainly serves as the upper wall portion of the suction head 12. A member mounting portion 15 is formed to bulge upward at the center portion of the upper case 14 in the longitudinal direction (width direction of the suction head 12).

  The lower case 16 is made of synthetic resin and mainly serves as the bottom wall of the suction head 12. A suction opening 17 (see FIG. 4 and FIG. 6) that extends in the longitudinal direction of the lower case 16 (the width direction of the suction head 12) is opened on the lower surface of the front portion of the lower case 16. A member attaching portion 18 having a projecting portion projecting rearward is integrally formed at a longitudinal center portion of the rear portion of the lower case 16. The central portion in the width direction of the member mounting portion 18 is formed by an arc-shaped groove portion that opens upward, and both front and rear ends of the groove portion are open.

  The upper case 14 and the lower case 16 are a plurality of screws that are screwed into a screw receiving portion formed in the upper case 14 through the lower case 16 with a bumper 19 made of synthetic resin or the like interposed therebetween. They are connected by screws.

  For example, as shown in FIGS. 7 and 14, the connecting portion 21 includes a connecting tube 22, a first rotating member 24, and a second rotating member 31.

  The connecting pipe 22 is made of synthetic resin, and is disposed at the rear part of the suction head 12 and at the center part in the width direction, and its horizontal central axis A (see FIG. 13) extends in the front-rear direction. The connecting tube 22 is positioned in the front-rear direction by engaging its front edge 22a (see FIG. 14) with the member mounting portion 15 of the upper case 14 and the member mounting portion 18 of the lower case 16 so that it cannot rotate. Are sandwiched between member mounting portions 15 and 18. Both front and rear ends of the connecting pipe 22 are opened, and the front end opening communicates with the suction opening 17 from the rear side as shown in FIG. The rear portion of the connecting tube 22 protrudes rearward from the upper case 14.

  The first rotating member 24 is made of synthetic resin and is rotatably attached to the outer periphery of the rear portion of the connecting tube 22. Therefore, the first rotation member 24 can rotate around the central axis A of the connecting pipe 22 disposed horizontally, in other words, can rotate in the left-right direction when the suction port body 11 is viewed from the front. . The first rotating member 24 has a pair of connecting arm portions 25 that are integrally projected rearward. As shown in FIGS. 14 and 18, semicircular first bearing portions 26 are integrally protruded from the intermediate portions in the longitudinal direction of the connecting arm portions 25.

  Further, a portion extending between the root portions of the pair of connecting arm portions 25 is used as a guide portion 27, and this guide portion 27 covers the upper rear end of the connecting tube 22 as shown in FIG. The guide part 27 has a guide surface 27 a (see FIG. 16) that is continuous with the upper part of the inner peripheral surface of the connecting pipe 22. The guide surface 27a is formed by an arcuate surface drawn around a bearing portion described later.

  The second rotating member 31 is formed in a substantially U shape by a synthetic resin as shown in FIG. The second rotating member 31 is combined with the first rotating member 24 from the side from which the first bearing portion 26 is protruded (below the connection arm portion 25 in the standard use state of the vacuum cleaner). A screw screwed through the second rotating member 31 is connected to the first rotating member 24. The first rotating member 24 and the second rotating member 31 thus connected constitute a rotating body that can be rotated in the left-right direction with the suction port body 11 viewed from the front.

  A space between the pair of connecting arm portions 25 of the connecting portion 21 is open. At the same time, the rear surface of the connecting portion 21 across the first rotating member 24 and the second rotating member 31 is also opened, and the open portion of the rear surface is at the rear end of the open portion between the connecting arm portions 25 on the front side. It is continuous.

  As shown in FIGS. 14 and 19, the second rotating member 31 has a semicircular second bearing portion 32 on the inner surfaces of the left and right sides. These second bearing portions 32 are combined with the first bearing portions 26 at corresponding positions to form a circular bearing portion as the first rotating member 24 and the second rotating member 31 are screwed together. The pair of bearing portions included in the connecting portion 21 is a horizontal central axis of the connecting tube 22 as shown in FIG. 13 and the like in a state where the second rotating member 31 is disposed below the connecting arm portion 25. It is located below A.

  Further, the second rotating member 31 is integrally formed with a restricting portion 33 that protrudes inside the front end portion. The restricting portion 33 extends in an arc shape along the front edge of the connecting portion 21, and has restricting surfaces 33 a made up of oblique steps at both ends thereof. These regulating surfaces 33a are provided in the vicinity of the front side of the bearing portion.

  As shown in FIGS. 6 and 14, etc., the front portion 35a of the connecting pipe 35 made of synthetic resin is bent with respect to the rear portion 35c. As shown in FIG. 15, both side walls of the front portion 35a are substantially parallel to each other, and the front portion 35a is formed so that its air passage cross-sectional area becomes larger toward the front end opening of the connecting pipe 35, that is, toward the inlet 35b. . At the upper edge of the inlet 35b of the connecting pipe 35, a flange 36 is provided so as to project integrally on the outside, and at the lower edge of the inlet 35b, a flange 36b is provided so as to project integrally on the outside. Further, pivot portions 37 are integrally projected on the lower outer surfaces of both side walls of the front portion 35a of the connecting pipe 35, respectively. These pivot portions 37 have a short cylindrical shape.

  A rear portion 35 c of the connection pipe 35 is detachable from the inside of the distal end portion 7 c of the extension pipe 7. As shown in FIG. 14, a power supply pin 38 that can be inserted into and removed from a power supply terminal (not shown) provided at the distal end portion 7c of the extension pipe 7 is attached to the rear portion 35c, as shown in FIGS. Thus, a synthetic resin clamp 39 is rotatably attached.

  The clamp 39 is urged by a spring (not shown), has a pressing button portion 39a at an end portion on the front side portion 35a side, and has a hook portion 39b at an end portion on the power feeding pin 38 side. The hook portion 39 b is engaged with a hook receiving portion (not shown) provided at the distal end portion 7 c of the extension pipe 7 to maintain the connection state of the connection pipe 35 to the extension pipe 7. The engagement of the hook part 39b is released when the pressing button part 39a is pressed, and the suction pipe 11 and the extension pipe 7 are separated by pulling the connecting pipe 35 in this state. Yes.

  As shown in FIG. 4 etc., the auxiliary brush 41 is detachably attached to the outer periphery of the rear portion 35c of the connecting pipe 35. As shown in FIG. 6 and the like, the auxiliary brush 41 includes a synthetic resin auxiliary cylinder 42 fitted in the rear portion 35c of the connecting pipe 35, a brush body 43 rotatably attached to the auxiliary cylinder 42, An auxiliary power supply pin 44 and an auxiliary power supply terminal (not shown) are provided.

  The front part of the auxiliary cylinder 42 is fitted to the outer periphery of the rear part 35 c of the connection pipe 35, and the rear part of the auxiliary cylinder 42 is detachable from the inside of the distal end part 7 c of the extension pipe 7. The front end portion of the auxiliary cylinder 42 has a hook receiving portion 42a, and the hook portion 39b of the clamp 39 can be attached to and detached from the hook receiving portion 42a.

  Therefore, by engaging the hook portion 39b of the clamp 39 with the hook receiving portion 42a of the auxiliary brush 41 attached to the connection pipe 35, the front portion of the auxiliary cylinder 42 is fitted to the outer periphery of the rear portion 35c of the connection pipe 35. Held together. In this state, by inserting and connecting the rear portion of the auxiliary tube 42 to the extension tube 7, the connection tube 35 is connected to the distal end portion 7 c of the extension tube 7 via the auxiliary tube 42. In this connection state, the power feed pin 38 is detachably inserted and connected to an auxiliary power feed terminal (not shown), and the auxiliary power feed pin 44 electrically connected to the auxiliary power feed terminal is attached to and detached from a power feed terminal (not shown) of the extension pipe 7. Plugged in and connected. Thereby, it is possible to energize an electric motor 72 for driving a cleaning body described later.

  The auxiliary brush 41 is separated from the suction port 11 while being held by the extension tube 7 by moving the extension tube 7 in a direction away from the suction port body 11 while the pressing button portion 39a of the clamp 39 is pressed. Can be used in this state. However, the auxiliary brush 41 can be omitted.

  The front part 35a of the connection pipe 35 is a first bearing fitted into the pair of pivot portions 37 from the outside in a state of being housed inside the first rotating member 24 and the second rotating member 31 of the connecting portion 21. It is supported by the bearing portion formed by the part 26 and the second bearing part 32. Thereby, the connection pipe 35 is rotatably attached to the suction head 12. The axis B (see FIG. 15) passing through the pair of pivot portions 37 is orthogonal to the central axis A when the state in which the second rotating member 31 is disposed below the connecting arm portion 25 is viewed in plan view. Have a relationship.

  The connection pipe 35 is rotated in the vertical direction around the bearing portion in a state where the second rotation member 31 is disposed below the connection arm portion 25 (standard use state of the vacuum cleaner). 6 and 7 and can be rotated between the first position shown in FIGS. 6 and 7 and the second position shown in FIGS. 12 and 13.

  The first position refers to a position where the connecting pipe 35 is inverted so as to be substantially perpendicular to the connecting portion 21. In a state where the connection pipe 35 is rotated upward and disposed at the first position, a press button portion 39a of a clamp 39, which will be described later, is brought into contact with the second rotation member 31 from the rear, and the connection pipe 35 is The front part 35a is inserted into the inside of the connecting pipe 22 of the connecting part 21 from the rear side as shown in FIGS.

  The suction port body 11 includes a holding projection 51 and a holding projection 52 as temporary fixing means for holding the connection pipe 35 in the first position. The holding projection 51 (see FIG. 15) is integrally projected on the outer surface of one side wall 35 a of the connection pipe 35. The holding convex portion 52 (see FIGS. 14 and 18) is integrally protruded from one of the left and right connecting arm portions 25 toward the other connecting arm portion.

  Immediately before the connection pipe 35 is rotated upward from the second position or the third position to reach the first position, and the connection pipe 35 is rotated downward from the first position toward the second position or the third position. In some cases, the holding projection 51 can get over the holding projection 52 with the elastic deformation of the connecting arm portion 25 and the feeling of moderation based on this deformation. With the connecting pipe 35 disposed in the first position, the holding projection 51 is in a state of being hooked and engaged with the holding convex portion 52 from the front side. Temporarily fixed.

  The second position refers to a position where the connecting pipe 35 is tilted so as to continue to the rear of the connecting portion 21 as shown in FIGS. 12 and 13. In a state where the connecting pipe 35 is rotated downward and disposed at the second position, the lower portion of the flange 36b is brought into contact with the restricting portion 33 from the rear side so that the connecting pipe 35 is not further rotated downward. . At the same time, in the same state, the upper portion of the front portion 35 a of the connection pipe 35 is disposed away from the guide portion 27 of the first rotating member 24 in the rear thereof.

  A predetermined third position is set between the first position and the second position. 10 and 11 show a state in which the connecting pipe 35 is disposed at the third position and is obliquely upward with respect to the suction head 12. When the connection pipe 35 is tilted to the third position and the vacuum cleaner is used in a standard state, the height of the handle 8 of the dust suction hose 6 from the surface to be cleaned is (80 ± 10) cm. . The height 80 cm of the handle 8 within this range is the height from the surface to be cleaned of the handle 8 in order to measure the running load of the suction port 11 defined by JIS, so that the connecting pipe 35 is in the third position. The height of the handle 8 in the state where it is arranged in accordance with JIS regulations.

  And in most scenes in the use state of the vacuum cleaner performed by the user pushing and pulling the suction port 11, the height of the handle 8 relative to the surface to be cleaned is in the range of (80 ± 10) cm, Such a use state of the vacuum cleaner is referred to as a standard use state in this embodiment. In addition, when cleaning under the bed etc., it uses in the state which the connection pipe 35 has been arrange | positioned in the 2nd position or its vicinity. 8 and 9 show a state in which the connecting pipe 35 is disposed between the first position and the third position, and a shutter 46 described later is pulled out.

  The shutter 46 made of synthetic resin is formed in a substantially U shape as shown in FIGS. 14 and 17, and has semicircular engaging grooves 47 at both ends thereof, and from the rear edge. It has an engagement edge 48 bent on the back side. The shutter 46 is attached so as to cover the front portion 35a of the connecting pipe 35 from above by fitting the engaging groove 47 into the pivot portion 37 from above as shown in FIG.

  The shutter 46 can be rotated in the front-rear direction with the pivot portion 37 as a fulcrum, and can move between the drawer position and the storage position by this rotation.

  As shown in FIGS. 8 to 13, the shutter 46 disposed at the drawing position is provided across the guide portion 27 of the first rotating member 24 and the upper portion of the front portion 35 a of the connecting pipe 35 that is spaced apart from the guide portion 27. Yes. Thereby, the shutter 46 closes the space between the suction head 12 and the front end portion of the connection pipe 35. In other words, the shutter 46 prevents an upward opening (not shown) from being formed between the guide portion 27 and the upper portion of the front portion 35a. Further, the engaging edge 48 engages with the upper portion of the flange 36 of the connecting pipe 35 from the rear side in a state where the shutter 46 is disposed at the drawing position.

  The shutter 46 disposed at the storage position is inserted into the suction head 12, more specifically, from the rear side together with the front portion 35 a of the connection pipe 35 into the connection pipe 22 of the connection portion 21 as shown in FIGS. 6 and 7. ing. The shutter 46 in the housing position is arranged so as to narrow the inside of the connecting pipe 22 that forms an air path from the suction opening 17 to the inlet 35b of the connecting pipe 35.

  When the connecting pipe 35 is rotated upward toward the first position, the shutter 46 is pushed forward at the boundary between the front part 35a and the rear part 35c (the root of the front part 35a). Is possible. At the same time, the shutter 46 can be rotated backward by the engaging means when the connecting pipe 35 is rotated downward from the first position toward the second position and the third position. Therefore, the shutter 46 can be rotated in the front-rear direction in conjunction with the vertical rotation of the connecting pipe 35. During this rotation, the surface of the shutter 46 is in sliding contact with the guide surface 27a.

  The engaging means is formed by a first engaging portion 55 and a second engaging portion 56. The first engaging portion 55 is composed of an upward projection integrally projecting from the front end portion of the connection pipe 35, specifically, for example, the upper end of the flange 36 as shown in FIGS. As shown in FIGS. 16 and 17, the second system region 56 is formed by a groove provided at the front end of the shutter 46. This groove is formed so as to open over the front surface and the lower surface of the front end portion of the shutter 46.

  The first engaging portion 55 and the second engaging portion 56 can be engaged / disengaged with at least one of the front portion of the connecting pipe 35 and the shutter 46, for example, mainly with elastic deformation of the shutter 46. When the connection pipe 35 is rotated downward in a state where the engagement between the first engagement portion 55 and the second engagement portion 56 is maintained, the shutter 46 is thereafter moved relative to the guide portion 27 of the suction head 12. Pulled out towards.

  A stopper 58 that prevents the backward rotation of the shutter 46 at a predetermined position is provided in the suction head 12. Specifically, the stopper 58 is formed of a protruding portion that protrudes so as to approach each of the connecting arm portions 25 of the first rotating member 24 as shown in FIGS. The stopper 58 is positioned in front of the holding convex portion 52. The rear edge of the shutter 46 can be contacted and separated from the front side of these stoppers 58. When the connecting pipe 35 is rotated downward from the first position to reach the third position, the stopper 58 receives the shutter 46, thereby preventing the backward rotation of the shutter 46.

  The suction head 12 is provided with holding means. This means is formed by a first holding part 61 and a second holding part 62.

  As shown in FIGS. 16 and 18, the first holding portion 61 is formed by a small protrusion that protrudes toward the inside of the first rotating member 24 at the front end of the guide portion 27. A plurality of small protrusions forming the first holding part 61 may be provided. The second holding unit 62 is provided in the shutter 46, and the front edge of the shutter 46 is used as the second holding unit 62, for example.

  The first holding part 61 and the second holding part 62 can be engaged and disengaged with at least one of the guide portion 27 and the shutter 46, for example, mainly with elastic deformation of the shutter 46. The shutter 46 is held at the drawer position in a state where the engagement between the first holding unit 61 and the second holding unit 62 is maintained. Further, when the engagement between the first holding portion 61 and the second holding portion 62 is released and the connecting pipe 35 is rotated upward, the shutter 46 is pushed into the storage position.

  The connecting pipe 35 and the shutter 46 are assembled to the connecting portion 21 as follows. First, the front portion 35a of the connecting pipe 35 is covered with the shutter 46 from the upper side, and the shutter 46 is rotatably supported by the pivot portion 37. Next, the front portion 35 a of the connecting pipe 35 with a shutter is positioned below the first rotating member 24 so that the front portion 35 a of the connecting pipe 35 with a shutter is positioned between the connecting arm portions 25 of the first rotating member 24 of the connecting portion 21. Assembling from the side, the pivot portion 37 is engaged with the first bearing portion 26. Finally, the second rotating member 31 is assembled to the first rotating member 24 so as to cover the front portion 35a from the lower side, and the second bearing portion 32 is fitted to the pivot portion 37 so that this state is obtained. The assembly is completed by screwing the second rotating member 31 to the first rotating member 24 in order to maintain.

  In this assembly, the lead wire to which the connector is attached is pulled out from one of the pivot portions 37 of the connection pipe 35. Further, the lead wire passes through a hollow portion that is out of the air passage in the first rotating member 24, and is drawn to the outside through a portion that is out of the air passage in the connecting pipe 22. At the same time, the connector is wired in the suction head 12 and connected to a circuit board of a motor control device 73 described later.

  As shown in FIGS. 3 and 6, a rotary cleaning body 71 is rotatably supported inside the front portion of the suction head 12. The lower part of the rotary cleaning body 71 enters the suction opening 17. The rear inner side of the suction head 12 is isolated from the portion where the rotary cleaning body 71 is housed, and an electric motor 72 and a motor control device 73 are incorporated in the rear part as shown in FIG. The electric motor 72 and the motor control device 73 are arranged separately on the left and right sides of the connecting portion 21.

  In order to rotationally drive the rotary cleaning body 71, the electric motor 72 and the rotary cleaning body 71 are connected via a transmission mechanism 74 (see FIG. 5). The transmission mechanism 74 is, for example, a belt type, and includes a drive gear fixed to the rotating shaft of the electric motor 72, a driven gear fixed to one end portion of the shaft portion included in the rotary cleaning body 71, and both the gears. It consists of a toothed belt wrapped around it. The motor control device 73 has a plurality of circuit components mounted on a circuit board, and is provided to control the rotation of the electric motor 72.

  During cleaning, the suction force generated by the operation of the electric blower 4 spreads into the suction port body 11, and dust-containing air on the surface to be cleaned is sucked into the suction port body 11 through the suction opening 17. At the same time, since the electric motor 72 is operated during cleaning, the rotary cleaning body 71 is rotated by the power of the electric motor 72. For this reason, while scraping out dust on the surface to be cleaned such as a carpet by the rotary cleaning body 71, the dust can be sucked into the suction port body 11 together with the air and cleaned.

  As shown in FIG. 3 and the like, a pair of front wheels 76 and a pair of rear wheels 77 are attached to the bottom wall of the suction head 12 with their lower portions protruding from the bottom surface of the bottom wall. Further, a detection roller 79 is attached to the bottom wall as a floor surface type detection body so as to be movable up and down. When the surface to be cleaned is a carpet, the detection roller 79 is greatly protruded from the bottom surface of the bottom wall so as to push away the hair of the carpet and sink, and when the surface to be cleaned is tatami or flooring, Pushed up by the surface. Therefore, the type of the floor surface is detected by a floor surface detection switch (not shown) linked to the movement of the detection roller 79, and the motor control device 73 detects the rotation of the electric motor 72 in accordance with this detection information. Control the speed to fit the surface.

  6 and 7 show the state of the suction port 11 when the vacuum cleaner 1 is stored. In this state, the connecting pipe 35 is inverted upward at an angle of about 90 with respect to the suction head 12. In this case, the holding projection 51 of the temporary fixing means is hooked on the holding convex portion 52 from the front side, and the connection pipe 35 is temporarily fixed at the first position. Therefore, the connection pipe 35 falls backward from the first position. Rotating downward is prevented. Further, in the state shown in FIGS. 6 and 7, the front side portion 35 a of the connection pipe 35 is inserted obliquely forward and downward into the connection pipe 22 of the connection portion 21 (air passage). At the same time, the shutter 46 is pushed at the base of the front portion 35 a and is disposed inside the connecting pipe 22 of the connecting portion 21, and the first engaging portion 55 of the front portion 35 a and the second engaging portion 56 of the shutter 46. And are engaged with each other.

  Since the electric blower 4 is not operated in the state in which the electric vacuum cleaner 1 is stored, the air passage in the connecting pipe 22 is narrowed by the front portion 35a of the connecting pipe 35 and the shutter 46 arranged at the above-described positions. Nevertheless, problems such as excessive noise generation and dust catching on the shutter 46 do not occur. 6 and 7, or from this state, the rotating body including the first rotating member 24 and the second rotating member 31 is rotated leftward or rightward with the connecting pipe 35. In the state, the vacuum cleaner 1 may be used, but this is an exceptional usage pattern. Therefore, it is exceptional that the above-described problem occurs due to the narrowed air path in the connecting pipe 22.

  When the vacuum cleaner 1 is used in a standard state, the connection pipe 35 of the suction port body 11 is tilted backward from the first position with respect to the suction head 12 together with the extension pipe 7, as shown in FIGS. 10 and 12. It is used by being disposed obliquely between the third position shown and the second position shown in FIGS.

  The initial behavior in such a use state is as follows. That is, as described above, the connecting pipe 35 is directed downward from the first position toward the third position in a state where the first engaging portion 55 and the second engaging portion 56 that are engaging means are engaged. The rearward rotation of the shutter 46 is linked to the downward rotation of the connecting pipe 35. Thereby, the shutter 46 is pulled out backward with respect to the guide part 27 so as to close the pair of connecting arm portions 25 included in the first rotating member 24 while sliding on the guide surface 27a of the guide part 27. . The state where the shutter 46 is pulled out in this way is shown in FIGS.

  When the connection pipe 35 rotated downward reaches the third position, the stopper 58 provided in the connection arm portion 25 receives the rear edge of the shutter 46, so that the backward rotation of the shutter 46 is prevented. That is, the predetermined drawing of the shutter 46 is completed. At the same time, the second holding part 62, which is the front edge of the shutter 46, is hooked on the first holding part 61 of the guide part 27 from the rear side. Due to such engagement, the shutter 46 is sandwiched between the first holding portion 61 and the stopper 58 from the front and rear, and is held at the drawing position.

  Further, the connecting pipe 35 continues to rotate downward and is rotated toward the second position beyond the third position. Accordingly, the interlocking of the backward rotation of the shutter 46 with the downward rotation of the connecting pipe 35 is released. That is, the first engaging portion 55 of the engaging means is disengaged from the second engaging portion 56 with a sense of moderation, so that the shutter 46 is left in a state where it is received by the stopper 58, while the connecting pipe 35. Is continuously rotated downward. 10 and 11 show a state immediately after the engagement means is disengaged. In this state, the inlet 35b of the connection pipe 35 is directed substantially directly in front.

  Along with the disengagement by the engaging means, the upper portion of the front portion 35 a of the connection pipe 35 is moved rearward along the rear surface of the shutter 46. Thereby, the upper part of the front part 35a is pulled out rearward so that the upper part of the front part 35a is continuous with the rear edge of the shutter 46.

  As shown in FIGS. 12 and 13 showing the state where the connecting pipe 35 is tilted to the maximum and the connecting pipe 35 reaches the second position as the connecting pipe 35 is turned downward, the connecting pipe 35 is In the state of being disposed between the third position and the second position, the suction head 12 and the front end of the connection pipe 35 are moved together with the upper portion of the front side part 35a of the connection pipe 35 being moved rearward of the guide part 27. Is opened upward. However, since the shutter 46 is already drawn out at the position where the opening is formed, the upward opening is closed by the shutter 46, in other words, the upward opening is prevented from being formed. During the cleaning, outside air can be prevented from being sucked through the opening.

  Since the connecting pipe 35 is tilted between the second position and the third position in a standard use state of the vacuum cleaner, unless the connecting pipe 35 is rotated upward toward the first position beyond the third position. The shutter 46 is not pushed forward. Therefore, cleaning can be performed while preventing the intake of the above-described outside air.

  In such a standard use state, the shutter 46 and the front portion 35a of the connecting pipe 35 are disengaged to the rear side of the connecting pipe 22 as shown in FIGS. Is arranged so that there is no. In addition, the shutter 46 is in a state where its forward rotation is restricted by the holding means. For this reason, the friction between the flange 36 of the connection pipe 35 and the shutter 46 can prevent the shutter 46 from rotating forward and entering the inside of the connection pipe 22.

  Furthermore, despite the vacuum cleaner 1 having a configuration in which the degree of vacuum in the suction port body 11 is several times higher than the conventional one, the shutter 46 is rotated forward by the high vacuum pressure, and the connecting tube 22. It can be prevented from being drawn in.

  Therefore, the dust-containing airflow from the suction opening 17 to the inlet 35b of the connection pipe 35 is prevented from being excessively disturbed by the shutter 46 and generating a large noise, and the dust in the dust-containing airflow is caught by the shutter 46. Can also be suppressed. That is, the suction port body 11 having the above-described configuration can be used with low noise while suppressing dust clogging therein. Even if the shutter 46 may enter the connecting pipe 22 for some reason, the shutter 46 rotates further forward because the front edge of the shutter 46 contacts the regulating surface 33a of the second rotating member 31. It will not be done.

  Next, a procedure for storing the suction port body 11 together with the extension pipe 7 in a state where the dust suction is stopped after cleaning will be described. In this case, the connecting pipe 35 that is inclined between the second position and the third position may be rotated upward toward the first position together with the extension pipe 7 to which the connecting pipe 35 is connected.

  Specifically, first, the connection pipe 35 is rotated upward from the state shown in FIGS. 12 and 13 or the state shown in FIGS. 10 and 11 toward the first position beyond the second position. Accordingly, at the same time when the connecting pipe 35 exceeds the third position, the connecting pipe 35 and the shutter 46 are engaged by the engaging means. That is, the first engagement portion 55 moved to the front side along the rear surface of the shutter 46 with the upward rotation of the connection tube 35 causes the second engagement of the shutter 46 at the same time as the connection tube 35 exceeds the third position. It enters into the part 56 and engages.

  Immediately after this, the root of the front portion 35 a of the connecting pipe 35 hits the rear edge of the shutter 46 and pushes the shutter 46 forward, so that the shutter 46 is separated from the stopper 58 to the front side. At the same time, the holding of the shutter 46 by the holding means is released by the force with which the connecting pipe 35 pushes the shutter 46 forward as described above. That is, the second holding portion 62 of the shutter 46 is removed with a sense of moderation from the first holding portion 61 of the suction head 12 and is allowed to rotate to the front side of the shutter 46.

  Therefore, the shutter 46 is rotated forward in conjunction with the upward rotation of the connection pipe 35 beyond the second position. Accordingly, the connecting pipe 35 reaches the first position while the shutter 46 is inserted into the connecting pipe 22 of the connecting portion 21 together with the upper portion of the front portion 35a of the connecting pipe 35. At this time, the holding projection 51 of the connection pipe 35 gets over the holding projection 52 of the connecting portion 21 and engages with the holding projection 52 with a sense of moderation. Therefore, as shown in FIG. 6 and FIG. The connecting pipe 35 rotated to the position is temporarily fixed by the holding means. In this state, the suction port 11 is stored together with the extension pipe 7.

  As described above, according to the first embodiment, the air path (in the suction head 12) during cleaning is caused by the shutter 46 that closes the upward opening between the front end portion of the connection pipe 35 and the suction head 12. The suction port body 11 capable of suppressing excessive noise generation and dust catching on the shutter 46 while suppressing the narrowing of the inside of the connecting pipe 22 of the connecting portion 21 accurately, and a vacuum cleaner provided with the same 1 can be provided.

  20 to 22 show a second embodiment. The second embodiment is different from the first embodiment in matters described below, and other configurations are the same as those in the first embodiment. Therefore, the second embodiment has the same or similar functions as those in the first embodiment. Are denoted by the same reference numerals as in the first embodiment, and description thereof is omitted.

  The suction port body 11 according to the second embodiment and the vacuum cleaner including the suction port body 11 are different from the first embodiment in the configuration of the shutter 46 included in the suction port body 11.

  Specifically, as shown in FIG. 21, a groove (back surface groove) 46 a extending in the front-rear direction is formed on the back surface of the shutter 46. The groove 46a is provided to escape the first engaging portion 55 made of a protrusion. The groove 46a and the second engaging portion 56 formed of the groove of the shutter 46 are separated by a back side boundary portion 46b left between them. As the connecting pipe 35 rotates, the first engaging portion 55 can move over the back side boundary portion 46b from the first engaging portion 55 to the groove 46a side with a sense of moderation, and conversely, the groove 46a. To the first engagement portion 55 side.

  By providing such a groove 46 a in the shutter 46, when the first engagement portion 55 is moved in the front-rear direction relative to the shutter 46, the first engagement portion 55 comes into sliding contact with the back surface of the shutter 46 and wears. Can be suppressed. Thereby, the function of the engaging means for interlocking the backward rotation of the shutter 46 with the downward rotation of the connection tube 35 until the connection tube 35 at the first position is rotated downward and reaches the third position. It can be reliably maintained over a long period of time.

  Further, as shown in FIG. 22, a groove (surface groove) 46 c extending in the front-rear direction is also formed on the surface of the shutter 46. The groove 46c is provided in order to escape the first holding part 61 made of a protrusion. The groove 46c and the second holding portion 61 formed of the front edge of the shutter 46 are separated by a front side boundary portion 46d remaining therebetween. As the connecting pipe 35 rotates, the first holding part 61 can move over the front boundary part 46d from the first holding part 61 to the groove 46c side with a sense of moderation. It is possible to get over the 1 holding part 61 side.

  By providing such a groove 46 c in the shutter 46, when the shutter 46 is moved in the front-rear direction with respect to the guide portion 27 of the connecting portion 21, the first holding portion 61 is brought into sliding contact with the surface of the shutter 46 and is worn. Can be suppressed. Thereby, the function of the holding means for holding the shutter 46 pulled out rearward with respect to the guide portion 27 in accordance with the downward rotation of the connecting pipe 35 from the first position is reliably maintained for a long period of time. It is possible to make it.

  The vacuum cleaner of 2nd Embodiment is the same as 1st Embodiment including the structure which is not shown in figure except the matter demonstrated above. Therefore, also in the second embodiment, the air path in the suction head 12 is narrowed during cleaning due to the shutter 46 closing the upward opening between the front end portion of the connection pipe 35 and the suction head 12. It is possible to provide a suction port body 11 capable of suppressing excessive noise generation and dust trapping on the shutter 46 and a vacuum cleaner including the same.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Vacuum cleaner main body, 2b ... Dust suction port, 4 ... Electric blower, 5 ... Dust suction air passage body, 7 ... Extension pipe, 11 ... Suction port body, 12 ... Suction head, 17 ... Suction opening, DESCRIPTION OF SYMBOLS 21 ... Connecting part, 22 ... Connecting pipe, 27 ... Guide part, 35 ... Connecting pipe, 35a ... Front part, 35b ... Inlet, 46 ... Shutter, 46a ... Groove, 46c ... Groove, 55 ... First engaging part (engagement) , 56... Second engaging portion (engaging means), 58... Stopper, 61... First holding portion (holding means), 62.

Claims (6)

A suction head having a suction opening formed on the lower surface of the front part and a connecting part provided on the rear part is rotatable between a first position that is inverted with respect to the connecting part and a second position that is continuous behind the connecting part. And a shutter that is interlocked with the rotation of the connecting pipe, and the shutter has an upward opening formed between the front end of the connecting pipe and the suction head. A suction port for a vacuum cleaner that is pivotable in the front-rear direction over a drawer position to be prevented and a storage position disposed in the suction head,
When the connecting pipe is rotated downward from the first position and reaches a third position between the first position and the second position, the connecting pipe is rotated downward to rotate downward. Engaging means for interlocking,
When the downwardly rotating connecting pipe reaches the third position, the shutter is received to prevent the shutter from rotating backward, and the connecting pipe extends beyond the third position toward the second position. A stopper that releases the interlock when rotated downward,
The stopper restricts the forward rotation of the shutter in a state where the shutter is received, and the restriction is released when the connecting pipe is rotated toward the first position beyond the third position. Holding means for allowing the shutter to turn forward;
A suction port for a vacuum cleaner characterized by comprising:   The engaging means is formed of a first engaging portion provided at a front end portion of the connecting pipe and a second engaging portion provided at a front end portion of the shutter, and the front side of the connecting pipe. The vacuum cleaner according to claim 1, wherein the first engagement portion and the second engagement portion are detachable with elastic deformation of at least one of the part and the front end portion of the shutter. Suction port body.   The holding means is formed of a first holding portion provided at a guide portion of the suction head with which the surface of the shutter is slidably contacted, and a second holding portion provided at the shutter, and the guide portion. The suction port body for a vacuum cleaner according to claim 1 or 2, wherein the first holding portion and the second holding portion are detachable with elastic deformation of at least one of the shutters.   4. The cleaning according to claim 2, wherein the first engagement portion is formed of a protrusion, and a groove for escaping the first engagement portion is formed on the back surface of the shutter so as to extend in the front-rear direction. Air inlet for machine.   The first holding portion is formed of a protrusion, and a groove for escaping the first holding portion when the shutter rotates is formed to extend in the front-rear direction on the surface of the shutter. The suction inlet for a vacuum cleaner according to any one of 4. A vacuum cleaner main body with a built-in electric blower and a dust suction port on the upstream side of the electric blower,
An extension pipe communicated with the dust suction port and a dust suction air passage body provided with the suction port body according to any one of claims 1 to 5 connected to a tip portion of the extension pipe;
The vacuum cleaner characterized by comprising.

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