JP4228227B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to a mouthpiece of a vacuum cleaner.

Conventionally, in vacuum cleaners, an extension pipe support with an operating handle is used as a suction joint for a floor suction tool (also called a suction body) to facilitate replacement and storage of attachments such as gap nozzles and extension pipes. There has been proposed a self-supporting structure in which the support body is connected and the support body is stood in a slightly inclined position with respect to the floor suction tool (see, for example, Patent Document 1). The extension pipe is detachably connected to the suction joint. However, no locking means for the support is provided, and the support is simply abutted against the contact portion provided in the main body of the floor suction tool.
In addition, as for the locking means, there is one that locks the swinging in the vertical direction only when the tube member is erected at the normal rotation position (see, for example, Patent Document 2).

JP 2000-139791 A JP-A-2-237523

In the technique disclosed in Patent Document 1, since the locking means for the support is not provided, the support easily falls down when clothes or hands are touched carelessly. Therefore, there is a risk of scratching the floor and furniture. Further, if the support body falls down, the user must bend down and raise the support body each time, which is inconvenient to use, and is troublesome in storing the vacuum cleaner.
On the other hand, in the structure provided with positioning means for setting the rotation position to be locked in addition to the locking means for locking the vertical swing of the pipe member as in Patent Document 2, the pipe member is not raised by being positioned at the normal rotation position. As long as it does not lock normally, the locked state tends to be halfway. For this reason, in such a semi-locked state or an incompletely locked state, the tube member easily falls down, and the same problem as in Patent Document 1 occurs.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to obtain a vacuum cleaner in which a suction joint is always securely locked in a normal position and can be self-supporting.

In order to solve the above-described problems, a vacuum cleaner according to the present invention includes a suction body having a suction port on a bottom surface, and is attached to the longitudinal center of the suction body so as to be rotatable in a horizontal plane so as to communicate with the suction port. A suction joint mounting case, a return means for returning the rotational position of the suction joint mounting case to the normal position, which is a predetermined position, with respect to the suction body, and a vertical rotation of the suction joint mounting case. A first suction joint rotatably supported; and a second suction joint coupled to the first suction joint so as to be relatively rotated through an oblique coupling surface; and the first suction joint. And a second locking means that locks the suction joints together and locks the first suction joint to the suction joint mounting case simultaneously when the two suction joints are erected straight. The lock hand Is a lock member that is slidably attached to the first suction joint, a spring that biases the lock member toward the suction joint attachment case, a cover that covers the lock member, An engaging ridge protruding from the suction joint mounting case so as to engage after pushing up the tip of the lock member, and the lock member provided on the inner surface of the cover attached to the second suction joint It is characterized by comprising an engaging recess into which the end enters and an abutting portion with which the rear end abuts when locked .

  By configuring the present invention as described above, the suction joint mounting case is always in the normal position by the return means, so that the first suction joint and the second suction joint can be locked up simply by standing straight. And can stably stand on the suction mouth body. Therefore, it is convenient for cleaning and storage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a suction body of a vacuum cleaner according to Embodiment 1 of the present invention, FIG. 2 is a top view of the suction body, FIG. 3 is a front view of the suction body, and FIG. FIG. 5 is an exploded perspective view showing the suction body from below, FIG. 6 is an exploded perspective view showing the suction joint assembly from below, and FIG. 7 is a perspective view showing a state where the cover for the lock member of the first suction joint is removed. FIGS. 8 to 13 are explanatory views of the locking operation, FIG. 8 is a top view of the suction joint assembly of FIG. 10, FIG. 9 is a front view of the suction joint assembly of FIG. 10, and FIGS. FIG. 13 is a cross-sectional view of the suction joint assembly showing the operation of the lock member according to the angle, and FIG. 13 is a cross-sectional view of the suction joint assembly at the time of locking. Moreover, FIG. 14 is explanatory drawing when cleaning a 2nd suction joint parallel to a wall.

(overall structure)
First, the overall configuration of the electric vacuum cleaner according to the present embodiment will be described with reference to FIG. FIG. 15 is a schematic side view of the vacuum cleaner.
This vacuum cleaner includes a vacuum cleaner main body 101 in which an electric blower, a control circuit, a dust collection filter, and the like are incorporated, a hose 102 connected at one end to a suction port of the vacuum cleaner main body 101, and a switch operation unit (not shown). A hand handle portion 103 that is provided and connected to the other end of the hose 102 and is operated by the user's hand, and an attachment main body portion such as a gap nozzle provided in a branched shape at the tip of the hand handle portion 103 104, an extension pipe 105 to which one end side is connected to the other branch connection port part of the hand handle part 103 via an open / close valve (not shown), and a mouthpiece 10 to which the other end side of the extension pipe 105 is connected. Yes. In the figure, reference numeral 106 denotes a trigger for removing the extension tube 105.
The hand handle 103 does not have to be provided with an attachment main body such as a gap nozzle as described above, and only the extension pipe 105 in a form normally used may be detachably connected. . Further, the extension pipe may be either a telescopic type in which the pipe expands or contracts, or a joint pipe type in which a plurality of pipes are connected.

(Composition of mouthpiece)
Next, the configuration of the mouthpiece 10 will be described with reference to FIGS. 1 to 13 showing details of the P portion in FIG.
The suction body 10 includes a suction body 1 having a suction opening on the bottom surface, a suction joint mounting case 3 that is attached to the central portion in the longitudinal direction of the suction suction body 1 so as to be horizontally rotatable and communicates with the suction opening 2, and a suction body. 1, a return means including a torsion spring 4 for returning the rotational position of the suction joint mounting case 3 to the normal position, and a first suction joint 5 pivotally supported in the suction joint mounting case 3 so as to be swingable up and down. And a second suction joint 7 coupled to the first suction joint 5 so as to be relatively rotated via an oblique coupling surface 6. In addition, the “normal position” herein refers to a position when the mouthpiece 10 and the second mouthpiece joint 7 are T-shaped when viewed from above, and is the most frequently used straight cleaning. It is a state.

  Further, each of the above-described constituent members will be described in detail. As shown in FIGS. 4 to 7, the inlet body 1 includes a lower case 8 provided with an inlet 2 on the bottom surface, and a lower case 8 covering the upper part thereof. And a rotary cleaning body 11 that is rotatably supported inside so as to face the suction port 2. A suction joint mounting case 3 constituting one of the suction joints is mounted on the rear portion of the center portion in the longitudinal direction of the suction body 1 so as to be horizontally rotatable.

(Configuration of inlet joint)
Here, the suction joint is configured such that the second suction joint 7 to which a tubular body such as an extension pipe is connected can be rotated with respect to the suction body 1 in up, down, left, and right directions. That is, it is a universal joint composed of a three-axis rotation mechanism. The configuration is as follows.

  The upper case 9 of the mouthpiece body 1 is formed with a semicircular cutout 12 having a rear opening at the attachment position of the mouthpiece fitting mounting case 3, and the mouthpiece fitting mounting case 3 is formed in the notch 12. It is held between the upper case 9 and the lower case 8 of the mouthpiece body 1 and is mounted so as to be rotatable in a horizontal plane. The suction joint mounting case 3 includes a joint mounting upper case 13 and a joint mounting lower case 14, and an opening 15 communicating with the suction port 2 of the suction body 1 is formed on the front surfaces of the upper and lower cases 13 and 14. Has been. The second joint mounting lower case 14a is provided separately in the joint mounting lower case 14, but these joint mounting lower cases may be formed integrally. Further, each of the joint mounting upper case 13 and the joint mounting lower case 14 (including the second joint mounting lower case 14a) has an arcuate guide at each front portion of the upper and lower walls forming the opening 15. Protrusions 16 a and 16 b are formed, and these arcuate guide protrusions 16 a and 16 b are formed into arcuate guide grooves 17 a provided in the cutout portion 12 of the upper case 9 of the mouthpiece body 1 and a circle formed in the lower case 8. By engaging each with an arcuate guide groove (not shown), the suction joint mounting case 3 has a predetermined rotation angle in the horizontal direction with respect to the suction body 1 in the horizontal direction (each about 45 °, a total of about 90 °). ) To rotate.

  Further, the first suction joint 5 is rotatably mounted on the suction joint mounting case 3 so as to rotate (swing) at an angle of about 90 ° with respect to the suction body 1. The first suction joint 5 is formed as a bent joint, and a cylindrical joint portion 18 is formed at the front thereof. Rotating shafts 19 project from the left and right side walls of the cylindrical joint portion 18, while the joint mounting upper case 13 and the joint mounting lower case 14 (in the illustrated example, the second joint mounting lower case). 14a) is formed with bearing parts 20 formed of semicircular arc-shaped notches, and the rotary shaft 19 is sandwiched and supported in these bearing parts 20 from above and below. Moreover, both the rotating shafts 19 are arranged so that the center line is parallel to the longitudinal direction of the mouthpiece body 1 at the above-described normal position. The first suction joint 5 and the second suction joint 7 are arranged in a direction perpendicular to the center line of the rotating shaft 19. A rectangular opening 21 is formed at the front of the cylindrical side surface of the first suction joint 5, and the opening 21 communicates with the suction port 2 of the suction body 1 through the opening 15 of the suction joint mounting case 3. (FIGS. 4, 9, and 10). The second suction joint 7 is coupled to the first suction joint 5 so as to rotate relative to the first suction joint 5, and the joint surface 6 is about 45 ° with respect to the central axis common to both the suction joints 5, 7. The second suction joint 7 is inclined by about 90 ° in each of the left and right directions with respect to the center of the first suction joint 5 by the inclined circular groove provided on the coupling surface 6 and the protrusion engaging therewith. It can be rotated about 180 degrees in total.

(Configuration of return means)
The return means comprises a torsion spring 4, and automatically restores the suction joint mounting case 3 to the original normal position by the urging force of the torsion spring 4 given in the rotational direction. In this example, the torsion spring 4 is interposed between a receiving case 22 fixed by a screw on the lower case 8 of the mouthpiece body 1 and a joint lower case 14 of the mouthpiece fitting case 3 ( 5, FIG. 6, FIG. 7). In the receiving case 22, a spring-cylinder cylinder 23 projects from the bottom, and a coil portion of the torsion spring 4 is inserted (externally fitted) into the spring-carrying cylinder 23. In addition, an arcuate spring locking wall 24 for hooking both ends of the torsion spring 4 and defining its return position (normal position) forwardly protrudes around the spring cylinder 23 at the bottom of the receiving case 22. At the rear, an arcuate guide wall 25 for guiding the suction joint mounting case 3 is projected.

  On the other hand, the lower cylinder 14 for fitting attachment of the suction fitting attaching case 3 has a guide cylinder 26 on its lower surface, which is slidably fitted to the spring-loaded cylinder 23 of the receiving case 22 to position the rotation center. It is provided hanging down. Further, around the guide cylinder 26, it is fitted forwardly inside the arc of the spring locking wall 24 of the receiving case 22, that is, between both ends of the torsion spring 4, and its return position (normal position) by the torsion spring 4. And a slide wall 28 that is slidably fitted and guided on the outer side of the arc of the guide wall 25 of the receiving case 22 hangs down. Is provided. Further, stopper ribs 29 are provided at both ends of the slide wall 28 to restrict the rotation of the torsion spring 4 so as to regulate the rotation range of the suction joint mounting case 3 to 45 ° to the left and right (total of about 90 °).

  In addition, the receiving cylinder 22 is formed by directly forming the guide cylinder 23, the spring locking wall 24, and the guide wall 25 formed on the receiving case 22 on the bottom surface of the lower case 8 of the mouthpiece body 1. Can be omitted.

(Configuration of locking means)
As shown in FIGS. 4, 7, and 10, the lock means 30 is disposed at the center of the upper surface in the normal position of the first suction joint 5. A plate-like lock member 31 is inserted between guide walls 32 provided in the axial direction of the first suction joint 5 and is slidably attached. A long hole 33 is provided in the lock member 31, and a screw mounting boss 35 for mounting the lock member cover 34 and a spring mounting portion 37 for mounting one end of the spring 36 are inserted into the long hole 33. Further, the other spring mounting portion is formed on the lower surface (back surface) of the lock member 31, and the spring 36 is mounted on these spring mounting portions 37, 38 so that the lock member 31 is moved forward (inlet joint mounting case 3). Side). Further, the rear end portion 31b of the lock member 31 is formed to be smaller in width than the front end portion 31a, and a notch groove 39 into which the rear end portion 31b is fitted is formed on the outer peripheral edge portion of the coupling surface 21 of the first suction joint 5. Is provided. Further, an appropriate chamfer 31c such as an R or C surface is provided at the lower end of the lock member 31.

On the other hand, a rib-like engagement protrusion 40 is formed on the upper surface of the suction joint mounting case 3 side with which the lock member 31 is engaged. The engaging protrusion 40 is also appropriately chamfered 40a such as an R or C surface. Further, on the rear end side of the lock member 31, an engagement recess 42 is formed on the inner surface of the cover 41 for the suction joint that is attached to the upper surface of the second suction joint 7, corresponding to the notch groove 39. The bottom wall of the mating recess 42 serves as an abutting portion 43 with which the rear end (upper end) of the locking member 31 abuts when locked. Further, the engaging recess 42 is formed so as to protrude on the surface of the cover 41, and therefore, the periphery of the engaging recess 42 is an open region for allowing the rear end portion 31 b of the lock member 31 to escape. That is, the rear end portion 31b of the lock member is inserted into and engaged with the engaging recess 42 only when the first suction joint 5 and the second suction joint 7 are straight.
The lock member 31 is covered with a cover 34, and the cover 34 is attached to the first suction joint 5 with one or a plurality of screws. By adjusting the backlash of the lock member tip 31a with the cover 34, the operating force (joint turning force) and holding force (locking force) at the time of locking can be adjusted.

(Other configurations)
A shutter 45 for closing the gap between the first suction joint 5 and the suction joint mounting case 3 to prevent air leakage is attached so as to be interlocked with the rotation of the first suction joint 5.
The lower case of the mouthpiece main body 1 is provided with a raised cloth 46 as a front support from the front edge to the lower surface on both sides of the front end, and a raised cloth as a rear support at the rear end. After being wound, the wheel 47 is attached so that the axle is parallel to the longitudinal direction of the mouthpiece body 1.
A bumper 48 for reducing impact is attached to the front portion of the upper case 9 of the mouthpiece body 1.

  Next, the operation of the electric vacuum cleaner configured as described above will be described. When cleaning a normal floor surface, carpet or the like, the extension pipe 105 is connected to the second suction joint of the suction body 10 as shown in FIG. 7 and the hand handle portion 103, the first suction joint 5 and the second suction joint 7 are straightened, and the suction body 10 is held by the hand handle portion 103 to perform cleaning while pushing and pulling back and forth. At this time, the pipe body after the first suction joint 5 can be swung up and down around the rotation shaft 18 of the first suction joint 5 in accordance with the forward and backward movement of the suction body 10. Further, if the first suction joint 5 is swung to the lowest end, the tube body from the first suction joint 5 to the hand handle 103 can be made substantially parallel to the floor surface, and the overall height of the suction body 10 can be increased. The height is low, and it is possible to clean a narrow place with a low height, such as under furniture or a bed, without moving the furniture.

  Further, when the suction body 10 collides with a wall or furniture (especially furniture, a desk leg, etc.) during forward movement, the suction body 1 automatically rotates relative to the suction joint mounting case 3, thereby impacting. In order to relieve the force, it is possible to prevent the wall, furniture or the mouthpiece body 1 from being damaged. Further, when the interference between the furniture and desk legs and the mouthpiece main body 1 is eliminated after passing through the furniture and desk legs, the mouthpiece body 1 is automatically returned to the original normal position by the return force of the torsion spring 4. Return to. Therefore, the mouthpiece body 1 is easy to clean because it is always held in a direction perpendicular to the operation direction (the mouthpiece body 10 and the extension pipe 105 are T-shaped) unless they contact a wall or wall.

  Further, when the hand handle portion 103 is operated to twist the second suction joint 7, the second suction joint 7 rotates relative to the first suction joint 5 from the coupling surface 21 in an oblique direction and bends. Therefore, for example, when the suction body 1 is pressed against the wall as shown in FIG. 14 and the second suction joint 7 is twisted, the suction body 1 and the second suction joint 7 can be made parallel. It is possible to efficiently clean a narrow wall near the wall.

  Further, when cleaning an extremely narrow place where the mouthpiece 10 is not required, such as the back side of furniture, the extension pipe 105 is removed by the trigger 106 of the hand handle 103. As a result, since the attachment main body 104 for the gap nozzle is attached to the hand handle portion 103, the gap nozzle can be inserted into the back side of the furniture for cleaning. An opening / closing valve (not shown) is provided at the connection port of the extension pipe 105 of the hand handle 103, and when the extension pipe 105 is removed, the connection port is closed by the opening / closing valve.

  Next, the locking operation of the second suction joint 7 will be described. First, as shown in FIG. 15, with the extension pipe 105 connected to the second suction joint 7, the first suction joint 5 and the second suction joint 7 are kept straight until the angle is slightly larger than 90 °. Let As described above, the case 3 for attaching the suction joint is always returned to the normal position by the torsion spring 4 and held, and therefore, the extension pipe 105 need only be raised. At this time, the lock member 31 operates as shown in FIGS. 10 to 13 according to the standing angle. That is, the lock member 31 rotates around the rotation shaft 18 together with the first and second suction joints 5 and 6, and the distal end portion of the lock member 31 is engaged with the engagement protrusion 40 projecting on the suction joint mounting case 3. When contacted, the lock member 31 is pushed up against the force of the spring 36. Accordingly, the rear end portion 31 b of the lock member 31 enters the engagement recess 42 formed on the inner surface of the cover 41 of the second suction joint 7 through the notch groove 39. When the lock member 31 is further rotated, the distal end portion 31 a gets over the engaging ridge 40 and falls to the front side of the engaging ridge 40 by the force of the spring 36. Then, at the lock position rotated at a predetermined angle, the front end (lower end) of the lock member 31 abuts the upper surface of the suction joint mounting case 3 on the front side of the engaging protrusion 40, and the rear end ( The upper end is in contact with the contact portion 43 in the engagement recess 42 and is locked in a state where the lock member 31 is pressed from above. At the same time, the first suction joint 5 and the second suction joint 7 are prevented from rotating. Next, as shown in FIGS. 16 and 17, the hand handle portion 103 is removed from the extension tube 105 by the trigger 106 of the hand handle portion 103. Accordingly, the extension pipe 105 connected to the second suction joint 7 can be stably and reliably held in a state where the extension pipe 105 is erected on the suction joint mounting case 3 of the suction body 1.

  Therefore, even if clothes, hands, etc. touch the extension tube 105 carelessly, the extension tube 105 does not easily fall down, so that furniture, floors, etc. are not damaged. In addition, when the cleaning is interrupted or when the vacuum cleaner is stored, the extension pipe 105 can be kept in a self-supporting state, so that the user can handle it while standing up. Convenient. Further, since the storage space can be reduced, storage is easy without taking up space. Furthermore, since the extension pipe 105 in a self-supporting state is unlocked if pulled to a certain extent strongly, cleaning can be resumed easily.

  Further, the first inlet joint 5 and the second inlet joint 7 are locked only when they are straight. That is, even if the second suction joint 7 is to be locked in a slightly bent state, the rear end portion 31b of the lock member 31 hits the inlet portion of the engagement recess 42, and the front end portion 31a of the lock member 31 pushes the engagement protrusion 40. I can't get over it, so it's not locked. Furthermore, in a state where the second suction joint 7 is bent more than that, the front end portion 31a of the lock member can get over the engagement protrusion 40, but the rear end portion 31b of the lock member is engaged with the engagement recess 42. The second suction joint 7 can be easily pulled back because it is disengaged and enters the open area (open space) outside thereof and is not engaged. In short, the second inlet joint 7 is not locked in a bent state or is in an unstable state even when the lock is inserted, so that the first inlet joint 5 and the second inlet joint 7 are not straight. It is not locked. Accordingly, the extension tube 105 can be made independent and stable.

  Further, the holding force (locking force) at the time of locking is set such that the head portion of the suction body 10 does not drop when the extension pipe 105 connected to the second suction joint 7 is lifted. If the locking force is too strong, it will be difficult to release the lock. Conversely, if the locking force is too weak, the head will drop easily when lifted. Because it is difficult to do.

Further, with the extension pipe 105 connected to the second mouthpiece joint 7 of the mouthpiece 10, the center of gravity G of the extension pipe 105 is positioned within the range of the front-rear width of the mouthpiece body 1 as shown in FIGS. 18 and 19. Set to The extension pipe 105 is set so that the center of gravity G is located within the range of the front-rear width of the mouthpiece body 1 in the length from the longest to the shortest, regardless of the extension type or the joint pipe type. At this time, the center-of-gravity position G may be set so as to be approximately in the middle of the front-rear width of the mouthpiece body 1. In addition, when the longest use and the shortest use of the extension tube are used, the angles θ1 and θ2 formed by the extension tube 105 with respect to the horizontal are suitably in the range of 91 to 97 °. Accordingly, the extension tube 105 is slightly forward tilted on the inlet body 1 when locked.
By setting the center-of-gravity position G and the angle θ as described above, the extension pipe 105 and other attachments can be stably made independent.

Embodiment 2. FIG.
In the present embodiment, although not shown, the first suction joint 5 and the second suction joint 7 are integrated to form a single suction joint. In this case, the suction joint is biaxially rotated in a horizontal direction (horizontal rotation) and a vertical swing. The structure of the locking means 30 is the same as that of the first embodiment, but the suction joint is not bent, so that the rear end portion of the locking member faces the engaging recess or is slightly inserted into the inside. . Further, the lock member cover 34 and the suction joint cover 41 may be integrated or separated.
Such a configuration of the locking means 30 can also perform the locking operation as described above, and can stably allow the extension pipe 105 and other attachments connected to the suction joint to be independent.

Embodiment 3 FIG.
The lock member 31 is preferably made of a hard material as much as possible from the viewpoint of durability. Since the holding force at the time of locking (locking force) varies depending on R at the front end of the locking member, R at the engaging protrusion, elasticity of the cover 34 for the locking member, and the like, the design is made with these factors in mind.
Further, by appropriately setting the length of the lock member (the length of the long hole), the front end of the lock member can be substantially flush with the front end of the cover 34. Thereby, an external appearance can be improved.
Further, by appropriately setting the length of the lock member (the length of the long hole), the lock member rear end can be brought into contact with the engagement recess 42, and thereby the second inlet joint 7. A so-called clicking sensation that is generated when the lever is slightly rotated to the left or right is obtained, and it can be sensed by hearing whether or not the second suction joint 7 is straight when performing the standing operation.

The perspective view of the mouthpiece of the vacuum cleaner which shows Embodiment 1 of this invention. The top view of the mouthpiece of FIG. The front view of the mouthpiece of FIG. AA sectional side view of FIG. The disassembled perspective view which shows the mouthpiece of FIG. 1 from the downward direction. The disassembled perspective view which shows the inlet-joint assembly of FIG. 1 from the downward direction. The perspective view which shows the state which removed the cover for lock members of the 1st suction joint. FIG. 11 is a top view of the suction joint assembly of FIG. 10. FIG. 11 is a front view of the suction joint assembly of FIG. 10. Sectional drawing of a suction-joint assembly which shows operation | movement of the lock member accompanying a standing angle. Sectional drawing of a suction-joint assembly which shows operation | movement of the lock member accompanying a standing angle. Sectional drawing of a suction-joint assembly which shows operation | movement of the lock member accompanying a standing angle. Sectional drawing of an inlet-joint assembly at the time of a lock | rock. Explanatory drawing when cleaning a 2nd suction joint parallel to a wall. The schematic side view of the vacuum cleaner of this invention. The side view when an extension pipe is locked. The side view when the hand handle is removed and the extension pipe is made independent. The figure which shows the positional relationship of an extension pipe gravity center position at the time of extension pipe independence, and a suction body. The figure which shows the positional relationship of the gravity center position at the time of the longest and shortest of an extension pipe at the time of extension pipe independence, and a suction body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction body, 2 Suction port, 3 Suction joint mounting case, 4 Torsion spring, 5 First suction joint, 6 Connection surface 7 Second suction joint, 8 Lower case, 9 Upper case, 10 Suction body, 11 Rotating cleaning body , 13 Joint mounting upper case, 14 Joint mounting lower case, 14a Second joint mounting lower case, 19 Rotating shaft, 22 Receiving case, 23 Spring loaded cylinder, 24 Spring locking wall, 25 Guide wall, 26 Guide Cylinder, 27 Spring locking wall, 28 Slide wall, 29 Stopper rib, 30 Locking means, 31 Lock member, 31a Lock member tip, 31b Lock member rear end, 31c Chamfer, 32 Guide wall, 33 Slot hole, 34 Lock member cover, 35 Screw mounting boss, 36 Spring, 37 Spring mounting portion, 39 Notch groove, 40 Engagement ridge, 40a Chamfer, 41 Suction joint cover, 42 Engagement recess 43 Contact part 101 Vacuum cleaner body 102 Hose 103 Hand handle part 104 Attachment body part 105 Extension pipe 106 Trigger

Claims (6)

A suction port body having a suction port on the bottom surface, a suction joint mounting case that is pivotally mounted in a horizontal plane in the longitudinal center of the suction port body and communicates with the suction port, and the suction port with respect to the suction port body Returning means for returning the rotational position of the joint mounting case to a normal position, which is a predetermined position, a first suction joint pivotally supported by the suction joint mounting case in a vertical direction, and the first suction joint. A second suction joint coupled to the suction joint so as to be relatively rotated via an oblique coupling surface, and when the first suction joint and the second suction joint are made to stand upright, One locking means is provided for locking these suction joints together and simultaneously locking the first suction joint with respect to the suction joint mounting case ,
The lock means includes a lock member slidably attached to the first suction joint, a spring that urges the lock member toward the suction joint attachment case, a cover that covers the lock member, In this case, the lock provided on the inner surface of the cover attached to the second suction joint and the engaging protrusion protruding from the suction joint mounting case so as to be engaged after pushing up the tip of the lock member An electric vacuum cleaner comprising an engaging recess into which a rear end portion of a member enters and an abutting portion with which the rear end portion abuts when locked . The engaging recess is formed so as to protrude from the upper surface of the cover of the second suction joint, and the outside of the protruding portion is an open region where the rear end of the lock member is not engaged. The vacuum cleaner according to claim 1 . The electric vacuum cleaner according to claim 1 or 2 , wherein the locking force of the locking means is set to such an extent that the suction port body does not drop when the extension pipe connected to the suction port joint is lifted. . When locked, the extension tube according to claim 1 to 3, characterized in that setting the position of the center of gravity of the extension tube in a state of being connected to the second suction coupling to lie within a range of longitudinal width of the suction port body The electric vacuum cleaner in any one. 5. The electric vacuum cleaner according to claim 4 , wherein the center of gravity of the extension pipe at the time of locking is at an approximately middle position of the front-rear width of the suction mouth body at the time of longest and shortest use. The vacuum cleaner according to any one of claims 1 to 5 , comprising a single suction joint in which the first suction joint and the second suction joint are integrated.

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