JP4109188B2 - Pipe fitting for vacuum cleaner and vacuum cleaner - Google Patents

Description

  The present invention relates to a pipe joint that is preliminarily provided in an intake air passage portion that guides air sucked from a surface to be cleaned to a cleaner body, or is attached if desired, and a vacuum cleaner that includes this pipe joint.

  Conventionally, in order to be able to easily clean under a sofa or a bed, a folding mechanism capable of fixing the grip part and the extension pipe at the end of the hose in a straight state is provided. An electric cleaning formed by a flexible hose that can be bent between two pipes, an arm that protrudes from each pipe along the hose, and a rotary connecting portion that rotatably connects the arms. A machine is known (for example, see Patent Document 1).

In Patent Document 1, in order to fix two pipes in a straight line state, a protruding piece having elasticity is provided at the ends of the arms arranged relatively outside of the arms connected to each other, A U-shaped convex portion is formed on the surface of the inner arm, and a concave portion is formed inside the convex portion. As a result, when both pipes in the bent state rotate so as to open each other, the elastic protruding piece naturally goes over the convex part with its elastic deformation and fits into the concave part, and both pipes are fixed in a straight line. . In this way, when the two pipes are fixed in a straight state and when the fixing is released, the elastic protrusions that are detachably fitted into the concave portions inside the U-shaped convex portions are caused by the elastic deformation thereof. Since the U-shaped convex portion can be overcome, there is no need to manually operate the elastic protrusion. Furthermore, Patent Document 1 also describes that a plurality of either the elastic protruding pieces or the U-shaped convex portions are provided, and the fixing positions of both pipes are set to a plurality.
JP 2000-300484 A (paragraphs 0043-0053, FIGS. 7-10)

  The U-shaped convex portion and the elastic protruding piece that are naturally attached and detached in accordance with the turning operation that changes the angle formed by the two pipes wear each time the elastic protruding piece gets over the U-shaped convex portion. For this reason, it may be difficult to maintain the reliability of the fixation over a long period of time.

  This point can be improved by providing a manually operated locking device in the bending mechanism. When such a locking device is provided, a device excellent in operability is preferable. In addition, general cleaning is performed in a form in which two pipes are connected straight through a bending mechanism, and the two pipes are connected in a bent state through a bending mechanism and the like is placed under the bed. The form of cleaning is irregular. For this reason, when switching from an irregular cleaning mode to a general cleaning mode, a switch with good switching operability is desired. However, there is no teaching in Patent Document 1 regarding these points.

  The problem to be solved by the present invention is to provide a pipe joint for a vacuum cleaner and a vacuum cleaner that are excellent in usability and excellent in durability of a lock device that maintains an intake air passage portion at least in a straight state. is there.

The pipe fitting for an electric vacuum cleaner of the present invention includes an extension pipe in an intake air passage portion that communicates a suction port body or a lightweight suction tool used in exchange for the suction port body and the suction port of the vacuum cleaner body. The two intake pipes are detachably connected to each other, and the upstream intake pipe and the downstream intake pipe that are disposed relatively upstream and downstream of the two intake pipes are in communication with each other. A first coupling member having a first connection pipe portion detachably connected to the upstream side intake pipe, and a pair of first coupling arms, A pair of second connection arms that are individually pivotably connected to the first connection arms, and a second joint member that has a second connection pipe portion that is detachably connected to the downstream side intake pipe, are connected to each other. A pair of the first and second connecting arms arranged on the side are disposed between the connecting arms. Provided in at least one of a flexible joint hose provided and communicating the first and second connecting pipe portions and the pair of first and second connecting arms, the joint members being linear And a locking device that allows the joint members to rotate relative to each other in an arrangement state in which the obtuse angle is formed on the front side of both the joint members. A lock member attached to the connection arm closer to the joint hose in the second connection arm and urged by an elastic member on the other connection arm side; both joint members provided on the other connection arm The lock member is fitted in a state where the lock member is fitted in a straight line, and the lock member is moved in a state in which the relative rotation of the joint members is permitted, provided in the other connecting arm by a hole or a recess. Fits in as possible In addition, there is an escape portion having a braking portion on which the lock member is slidable close to the lock hole, and a manual operation element that is pushed from the side to push the lock member out of the lock hole to release the lock. The first and second coupling arms are arranged so that the first and second joint members have obtuse angles of a predetermined angle on their front sides, and the two joint members are relatively rotated. A temporary stop and a click stop mechanism having a spring that regulates the temporary fixing force are provided, and when the suction tool is used, a temporarily fixed state by the click stop mechanism can be formed, and the suction port The spring force of the spring is defined so that a temporarily fixed state by the click stop mechanism is not formed when a body is used .

The pipe joint of the present invention connects two intake pipes that are detachably connected to each other by forming an extension pipe in the intake air passage section that communicates the suction opening body and the suction opening of the cleaner body. It is used Te. The pipe joint is operated by operating the manual operation member of the lock device from the side to release the lock member from the lock hole, thereby releasing the lock of the first and second joint members and then releasing the lock member. It can be in a state of floating within the club. As a result, the intake air passage portion can be used in a state in which the angle formed by both joint members changes freely. When the first and second joint members are arranged in a straight line state, the lock member urged by the elastic member is fitted into the lock hole and the joint members are fixed, so that the intake air passage portion is in a straight line state. Can be used to maintain.

  Then, in a state in which both joint members are bent, the suction port body of the intake air passage portion used in communication with the first joint member on the upstream side is lifted, and the weight of the suction port body and the like Is engaged with the first joint member, so that both joint members are naturally rotated so as to be in a linear state. As a result of this rotation, the locking member fitted in the relief portion slides on the braking part and comes off the relief portion, and then fits into the lock hole by the urging force. Fix to the state of arrangement.

In this case, since the lock member is braked at the braking portion of the escape portion, it is possible to suppress the lock convex portion which is a small component from being fitted into the lock hole vigorously and receiving an excessive load. Moreover, the lock member urged by the elastic member and fitted into the lock hole does not come off the lock hole unless the manual operation element is operated from the side of the joint hose, and when both joint members are rotated. In addition, the lock member and the lock hole do not slide and wear. Therefore, the durability of the lock member or the like is high, and the reliability that the lock device fixes both joint members in a straight state over a long period of time is high.
Moreover, when cleaning using a lightweight suction tool, the suction tool can be temporarily fixed with a click stop mechanism at an angle suitable for cleaning using the suction tool. When cleaning with the use of a click stop mechanism, these joints should be placed in a straight line with the weight of the suction port from the state where both intake pipes are bent without being interrupted by the temporary fixing function by the click stop mechanism. It can be rotated relatively.

According to the present invention, when cleaning is performed using a lightweight suction tool, the suction tool is temporarily fixed to an angle suitable for cleaning using the suction tool by a click stop mechanism so that the cleaning work can be performed. It can be used by bending the part, and when cleaning using the suction port body, it can be returned from a bent state to a straight state by simply lifting the intake air passage, so it is easy to use, The lock member of the lock device is hard to wear and can be braked and fitted into the lock hole, so that the intake air passage is maintained at least in a straight state. A pipe joint and a vacuum cleaner provided with this pipe joint can be provided.

  A first embodiment of the present invention will be described with reference to FIGS.

  1-4, the code | symbol 11 has shown the canister type vacuum cleaner. The electric vacuum cleaner 11 includes a cleaner main body 12 and an intake air passage portion 15 that guides intake air to the main body 12. The intake air passage portion 15 is used in combination with a pipe joint 17 prepared as an attachment, if necessary.

  The main body case of the vacuum cleaner main body 12 contains an electric blower 14 and electric parts (not shown). The main body case is provided with a dust collecting portion located on the suction side of the electric blower 14. The dust collection part has a filter attached to and detached from the main body case, for example. The main body case is provided with wheels and casters for facilitating movement of the cleaner main body 12 along the surface to be cleaned such as the floor surface, and is provided with a suction port 13 communicating with the dust collecting portion. .

  The intake air passage portion 15 includes a plurality of intake pipes 21 to 24 that are detachably connected to each other, an intake port body 25, and an intake hose 26. The intake pipes 21 to 24 are all made of a hard material such as a hard synthetic resin.

  The intake hose 26 formed in a bellows shape has flexibility and can be easily deformed. The intake hose 26 has the intake pipe 24 at one end in the longitudinal direction which is the tip. The intake pipe 24 is a pipe located on the most downstream side among the intake pipes 21 to 24 connected to each other. The intake pipe 24 functions as a grip pipe for operating the intake air passage section 15. For this purpose, the intake pipe 24 has a handle portion 24a in this embodiment. The handle portion 24a is provided independently of and away from the intake air passage that guides the intake air. The handle portion 24 a has an operation portion that gives an operation command to the electric blower 14. The handle portion 24a may be omitted and the intake pipe 24 may be directly gripped. The intake hose 26 has a connecting tube 27 made of hard synthetic resin at the other end in the longitudinal direction. The connection pipe 27 is detachably connected to the suction port 13.

  Among the intake pipes 21 to 23 arranged on the upstream side of the intake pipe 24, the intake pipes 22 and 23 are used as two-joint type extension pipes. A downstream end portion of the intake pipe 23 disposed relatively downstream in the extension pipe can be detachably connected to the intake pipe 24. The upstream end of the intake pipe 23 and the downstream end of the intake pipe 22 disposed relatively upstream in the extension pipe can be detachably connected. The downstream end of the intake pipe 22 can be detachably connected to the intake pipe 24.

  The suction port body 25 is suitable for cleaning the floor surface, and has a suction opening 25a for sucking dust on the floor surface together with air. The suction opening 25 a extends in the width direction of the suction port body 25. It does not prevent the suction port body 25 from incorporating a rotary cleaning body that is rotated by the suction air, or from a motor and a rotary cleaning body that is rotated by this power. Although not shown, an electric component such as the motor is attached to the suction port body.

  The intake pipe 21 included in the suction port body 25 is used as a connection pipe to an extension pipe or the like, and is positioned at the center in the width direction at the rear part of the suction port body 25 and can be tilted up and down and left and right. It is attached so that it can rotate. The intake pipe 21 is a pipe located on the most upstream side among the intake pipes 21 to 24 connected to each other. The downstream end of the intake pipe 21 can be detachably connected to the intake pipe 24 and can also be detachably connected to the upstream end of the intake pipe 22 or the upstream end of the intake pipe 23. For this reason, when the pipe joint 17 is not used, the suction port body 25 and the intake hose 26 are communicated with each other via the intake air passage portion 15 that is assembled linearly by connecting the intake pipes 21 to 24. The vacuum cleaner 11 can be used.

  The pipe joint 17 is used to connect the intake pipes disposed relatively upstream and downstream of the intake pipes 21 to 24 in a communicating state. The pipe joint 17 can connect the intake pipes 22 and 23, connect the intake pipes 23 and 24, or connect the intake pipes 21 and 22. This connection is selected by the user depending on the cleaning location.

  In the case of FIGS. 1 to 3 in which the intake pipes 22 and 23 are connected to each other by the pipe joint 17, the upstream intake pipe is the intake pipe 22 and the downstream intake pipe is the intake pipe 23 with reference to the pipe joint 17. In the case of FIG. 4 in which the intake pipes 21 and 22 are connected to each other by the pipe joint 17, the upstream side intake pipe is the intake pipe 21 and the downstream side intake pipe is the intake pipe 22 with respect to the pipe joint 17. When the intake pipes 23 and 24 are connected to each other by the pipe joint 17, the upstream side intake pipe is the intake pipe 23 and the downstream side intake pipe is the intake pipe 24 based on the pipe joint 17.

  The pipe joint 17 will be described with reference to FIGS. The pipe joint 17 includes a joint member 31, a joint member 41, a joint hose 50, a lock device 55, and the like. The joint members 31 and 41 are disposed adjacent to the upstream side and the downstream side relative to the suction airflow. In this specification, the joint members disposed on the upstream side are referred to as the first joint member 31. The joint member disposed on the downstream side is referred to as a second joint member 41.

The first joint member 31 made of hard synthetic resin has a first connecting pipe portion 32 and a pair of first connecting arms 33 and 34. The first connection pipe portion 32 is a straight tube, and one end portion in the axial direction thereof is detachably fitted to and connected to the first intake pipe. Reference numeral 31a denotes an electrically insulating cover that covers a metal terminal, which will be described later, which is electrically connected to the upstream intake pipe. The through hole 31b of the cover 31a is connected to the upstream intake pipe. The pressing part of the operation member 30 for fixing the connection and releasing the connection is passed.

  The first connection arms 33 and 34 are cantilevered at the other end in the axial direction of the first connecting pipe portion 32. One first connecting arm 33 is formed separately from, for example, the first connecting pipe portion 32, and extends in the axial direction of the root portion 33 a and the first connecting pipe portion 32 from there. Arm portion 33b. Similarly, the other first connecting arm 34 is also formed separately from the first connecting pipe portion 32, and is formed of a root portion 34a and an arm portion 34b that protrudes integrally therewith. . One of the first connecting arms 33 and 34 can be formed integrally with the first connecting pipe portion 32.

  The root portions 33 a and 34 a are formed in a shape covering substantially half of the first connecting pipe portion 32. These root portions 33a and 34a are connected to each other with screws in the axially other end portion of the first connecting pipe portion 32 so as to be fitted so as to sandwich this end portion from both sides in the radial direction. 1 It is attached to the connecting pipe part 32. By this attachment, the cover 31a is pressed and fixed from the outside. As a preferred example, the arm portions 33b and 34b have a circular shape larger than the diameter of the joint hose 50, and are provided in parallel to each other with the joint hose 50 therebetween.

  The second joint member 41 made of hard synthetic resin has a second connecting pipe portion 42 and a pair of first connecting arms 43 and 44. The second connection pipe portion 42 is a straight tube, and one end in the axial direction thereof is detachably fitted to and connected to the downstream intake pipe. Reference numeral 41a denotes an electrically insulating cover that covers a metal terminal, which will be described later, which is electrically connected to the downstream side intake pipe.

  Second connecting arms 43 and 44 are cantilevered at the other axial end of the second connecting pipe portion 42. One of the second connecting arms 43 is formed separately from, for example, the second connecting pipe portion 42, and extends integrally with the root portion 43 a and the second connecting pipe portion 42 in the axial direction. Arm portion 43b. Similarly, the other second connecting arm 44 is also formed separately from the second connecting pipe portion 42, and is formed of a root portion 44a and an arm portion 44b that is integrally projected therefrom. . One of the second connecting arms 43 and 44 can be formed integrally with the second connecting pipe portion 42.

  The root portions 43 a and 44 a are formed in a shape covering substantially the half circumference of the second connection pipe portion 42. These root portions 43a and 44a are connected to each other with screws in a state where they are fitted to the other axial end portion of the second connecting pipe portion 42 so as to sandwich this end portion from both radial sides. 2 It is attached to the connecting pipe part 42. By this attachment, the cover 41a is pressed and fixed from the outside.

  The arm portions 43b and 44b are parallel to each other, and as a preferred example, have a circular shape having substantially the same diameter as the arm portions 33b and 34b. These arm portions 33b, 34b, 43b, and 44b function as hose protection means for preventing contact between the joint hose 50 and the floor surface by contacting the floor surface when cleaning the floor surface facing the lower space of the furniture. Therefore, the lower edge of the arc shape (which is drawn on the upper side in FIG. 6 (B)) is formed to have a size that protrudes downward most in the pipe joint 17. . As described above, the arm portions 33b, 34b, 43b, and 44b have a circular shape with the above-mentioned size. This means that the area where the lock device 55 is disposed and the area where the finger is applied in the unlocking operation of the lock device 55 are respectively determined. It is preferable in that it can be secured largely.

  As shown in FIG. 9 etc., a pair of 1st connection arms 33 and 34 are arrange | positioned among these so that it may be pinched | interposed by a pair of 2nd connection arms 43 and 44. As shown in FIG. One first connecting arm 33 and one second connecting arm 43 covered with the first connecting arm 33 are rotatably connected. Similarly, the other first connecting arm 34 and the other second connecting arm covered with the first connecting arm 33 are connected. 44 is rotatably connected.

  Specifically, a bearing portion 39 having a circular hole opened on the surface of the arm portion 33b is integrally formed at the center portion of the arm portion 33b of the first connecting arm 33. At the center of the arm portion 43 b of the second connecting arm 43, a circular pivot convex portion 46 that protrudes toward the arm portion 33 b and fits rotatably in the bearing portion 39 is provided integrally. The inside of the pivot protrusion 46 is a recess that opens to the surface of the arm 43b. A tightening nut 48 is screwed from the back side of the arm portion 33 b to a screw 47 inserted into the pivot convex portion 46 from the inside and penetrating the bottom wall of the bearing portion 39. Thereby, the 1st connection arm 33 and the 2nd connection arm 43 are connected so that rotation is possible. Reference numeral 49 in FIG. 9 indicates a washer, and reference numerals 33 c in FIGS. 9 and 11 indicate hexagonal recesses provided in the arm portion 33 b to receive and prevent the head of the tightening nut 48. ing.

  At the center of the arm portion 34 b of the other first connecting arm 34, a cylindrical pivot convex portion 35 that projects toward the back surface of the other second connecting arm 44 is integrally projected. The back side of the pivot protrusion 35 is a recess. On the back surface of the arm portion 44 b of the second connecting arm 44, a fitting cylinder 45 that is pivotably fitted to the pivot convex portion 35 is integrally projected. A screw 36 inserted from the front side of the second connecting arm 44 into the central portion of the arm portion 34 b and penetrating the central portion of the pivot convex portion 35 includes a tightening nut 37 from the back side of the pivot convex portion 35 and an excessive amount of the nut 37. Lock nuts 38 for restricting proper tightening are screwed together. Thereby, the 1st connection arm 34 and the 2nd connection arm 44 are connected so that rotation is possible.

  The screws 36 and 47 are arranged on an extension line of each other. The axial extension lines of the screws 36 and 47 coincide with the rotation center line when the first and second joint members 31 and 41 are relatively rotated. This rotation center line is indicated by reference numeral L1 in FIGS. The rotation center line L1 is orthogonal to the center line L2 at substantially the same height as the center line L2 (see FIG. 9) of the joint hose 50. Thus, even when the first and second joint members 31 and 41 form an obtuse angle and are relatively rotated to the front side (upper side), the first and second joint members 31 and 41 are rotated to the reverse side (lower side). Even in this case, the joint hose 50 is prevented from being crushed so that the cross-sectional area of the flow path is reduced, and the joint hose 50 can be bent upward or downward without difficulty.

  The bellows-like joint hose 50 is bent from a straight state, so that a repulsive action for eliminating the shrinkage occurs on the contraction side, and a repulsion action for eliminating the expansion occurs on the expansion side. That is, when the joint hose 50 is not restrained by the locking device 55, the joint hose 50 generates a restoring force to return to the linear state.

  The joint hose 50 is flexible, and is preferably made of a material such as soft vinyl chloride or elastomer, and is formed in a bellows shape by, for example, blow molding and can be freely bent. The joint hose 50 has one axial end connected to the first connecting pipe portion 32 via an adhesive or the like, and the other axial end connected to the second connecting pipe portion 42 via an adhesive or the like. The first and second joint members 31, 41 are communicated with each other.

  The configuration in which the first and second coupling members 31 and 41 are communicated using the bellows-shaped coupling hose 50 is excellent in that the configuration is simple and the airtightness of the pipe coupling 17 is high. In addition, the air passage cross-sectional area of the first and second connection pipe portions 32 and 42 and the air passage cross-sectional area of the communication path (joint hose 50) are held substantially the same, and pressure loss at the pipe joint 17 is suppressed. It is also preferable in that it is difficult to lower the intake performance of the vacuum cleaner 11. The joint hose 50 includes the arm portions 33b and 43b of the first and second connection arms 33 and 43 that are rotatably connected to each other, and the other first and second arms that are also rotatably connected to each other. It arrange | positions between the arm parts 34b and 44b of the connection arms 34 and 44. FIG. The diameter of the joint hose 50 is smaller than the diameter of each arm portion 33b, 34b, 43b, 44b, so that the joint hose 50 is below the arcuate lower edge of each arm portion 33b, 34b, 43b, 44b in any state. It is designed not to protrude.

  The locking device 55 is connected to one of the first and second connecting arms 33 and 43 that are rotatably connected to each other at one side position of the joint hose 50 and is also rotatably connected to the other side position of the joint hose 50. At least one of the other first and second connecting arms 34 and 44, for example, the first and second connecting arms 33 and 43 is provided. The locking device 55 can fix both the joint members 31 and 41 when the angle formed between the joint members 31 and 41 becomes a predetermined angle, as shown in FIGS. A member 56, a plurality of first and second lock holes 57 and 58, a relief portion 59, a lock portion cover 60, a push button 72 that is a manual operator, and the like are provided.

  The lock member 56 has a stepped shape having a lock projection 56a at one end thereof. As shown in FIG. 13, the lock projection 56a has a substantially rectangular shape.

  As shown in FIGS. 7 and 11, the first connecting arm 33 is formed with a cylindrical accommodating portion 65 located outside the bearing portion 39, that is, on the peripheral portion of the arm portion 33 b. It has a substantially rectangular through hole 65a that is closed by an arm portion 43b that overlaps the arm portion 33b. The lock member 56 is inserted into the through hole 65a of the lock convex portion 56a and is accommodated in the accommodating portion 65 so as to be movable along the axial direction. The lock member 56 is urged from the back side thereof by an elastic member, for example, a spring 66, which is an urging member in a direction in which the lock projection 56a protrudes from the through hole 65a. The lock member 56 can be pushed so that the lock projection 56a does not protrude from the through hole 65a against the spring force of the spring 66. Further, the lock member 56 is hooked around the through hole 65a and is prevented from coming off. In FIG. 9 to FIG. 11, reference numeral 67 denotes a back cover that is fitted in the accommodating portion 65 and receives a spring 66.

  As shown in FIGS. 11 and 12, the first lock hole 57, the second lock hole 58, and the escape portion 59 are moved by the lock convex portion 56 a when the joint members 31 and 41 are relatively rotated. Located on the locus, the second joint member 41 is provided on the arm portion 43b of the second connecting arm 43.

  Each of the first and second lock holes 57 and 58 is a substantially rectangular hole corresponding to the shape of the lock protrusion 56a, and radiates with respect to the rotation center of the second connection arm 43 as shown in FIG. It extends in the direction. Accordingly, the lock projection 56a selectively fitted into the first and second lock holes 57 and 58 has a substantially rectangular shape having a long axis extending in the radial direction with respect to the rotation center of the second connection arm 43. ing.

  The first lock hole 57 is provided to fix the joint members 31 and 41 in a linear arrangement state, and the second lock hole 58 is an obtuse angle such as 135 on the back side (lower side) of the joint members 31 and 41. It is provided to fix the arrangement to make an angle of °. For this reason, as shown in FIG. 12, the first and second lock holes 57 and 58 are shifted by 45 ° with respect to the rotation center of the second connecting arm 43. A plurality of second lock holes 58 may be provided at different angular positions.

  The escape portion 59 is provided on the side opposite to the second lock hole 58 with respect to the first lock hole 57 and has an arc shape with the rotation center of the second connection arm 43 as a reference. The escape portion 59 is made of an arc-shaped hole, but may be an arc-shaped recess. The relief portion 59 is provided to allow relative movement of the lock convex portion 56a fitted into the relief portion 59 with respect to the relief portion 59 when the joint members 31, 41 make an obtuse angle on the front side (upper side) thereof. It has been. By this relative movement, the joint members 31 and 41 are allowed to rotate relative to each other within a range of 90 ° from the linear state. The escape portion 59 has, for example, an inclined surface 59a as a braking portion at an end portion near the first lock hole 57. The inclined surface 59a is farther from the first lock hole 57 on the front surface side of the arm portion 43b and closer to the first lock hole 57 on the rear surface side of the arm portion 43b.

  The configuration in which the relief portion 59 made of a hole or a recess is provided is such that when the both joint members 31 and 41 are rotated relatively by forming an obtuse angle on the front side (upper side) of the joint members 31 and 41, This is preferable in that the sliding resistance can be eliminated, the relative rotation of the joint members 31 and 41 can be made smooth, the wear of the lock projection 56a can be prevented, and the durability of the lock device 55 can be ensured. However, in the present invention, the following configuration may be used instead of the escape portion 59 formed of a hole or a dent. When both the joint members 31 and 41 are rotated relatively with an obtuse angle on their front side (upper side), they correspond to the movement locus of the lock projection 56a and continue to the hole edge of the first lock hole 57. The flat surface of the arm portion 43b can be used as a relief portion. In this case, the braking portion near the first lock hole 57 can be made of, for example, a rough surface having an uneven surface having a plurality of ribs and protrusions substantially orthogonal to the relative movement direction of the lock protrusion 5a.

  The lock portion cover 60 is attached to the arm portion 43b from the surface side by, for example, screwing or the like. A substantially oval through hole 71 is formed in the lock portion cover 60, and a manual operator such as a push button 72 protruding from the through hole 71 is attached. Specifically, as shown in FIGS. 8 and 11, the push button 72 has a substantially oval shape corresponding to the shape of the through hole 71, and has a support shaft 72 a near one end in the longitudinal direction. By supporting the support shaft 72a on the bearing portion 60a of the lock portion cover 60, the push button 72 is attached to the lock portion cover 60 so as to be rotatable around the support shaft 72a so as to perform, for example, a seesaw motion. . Reference numeral 72b denotes a pressing operation unit that serves as a guide for a pressing position provided, for example, in a recess near the other end in the longitudinal direction of the push button 72. Between the push button 72 and the arm portion 43b, a spring 73 that urges the push button 72 to always protrude from the through hole 71 is sandwiched.

  As described above, the pressing operation portion 72b of the push button 72 attached to the second connection arm 43 is connected to the rotation center of the second connection arm 43 and the root portion 43a of the second connection arm 43 with respect to the support shaft 72a. They are arranged close together. Therefore, when the user presses the push button 72 with the thumb of the left hand so that the user's palm corresponds to the second connecting pipe portion 42 and the left hand is attached to the pipe joint 17 from below, the pressure on the thumb is pressed. The position of the operation unit 72b is appropriate so as not to be too far or too close. Thereby, the operativity of the pipe joint 17, and the operativity for adjusting the angle of the intake air passage 15 at the time of cleaning can be improved.

  Moreover, the push button 72 is provided so as to obliquely intersect the center line L2 of the pipe joint 17 in a state in which both the joint members 31 and 41 are arranged in a straight line state. That is, in the linear state, the other end portion (downstream end portion) of the push button 72 having the pressing operation portion 72b is positioned above the one end portion (upstream end portion) on the support shaft 72a side of the push button 72. Thus, the push button 72 is inclined (see FIG. 5). Accordingly, as described above, when the left hand is attached to the pipe joint 17 from below, and when the right hand is attached to the pipe joint 17 from above, the upper finger from the thumb joint which is slightly lowered appears. Substantially the entire portion can be brought into contact with the push button 72 without excess or deficiency. As described above, the relationship between the thumb and the push button 72 does not vary greatly in any way, and this is preferable in the operation of the pipe joint 17.

  A number of release legs 74 and 75 corresponding to the lock holes 57 and 58 are integrally projected at the end of the push button 72 on the side of the pressing operation portion 72b. One release leg 74 is provided opposite to the first lock hole 57 and can be pushed into the first lock hole 57 when the push button 72 is pushed. The other release leg 75 is provided so as to face the second lock hole 58 and can be pushed into the second lock hole 58 when the push button 72 is pushed.

  A click stop mechanism 81 shown in FIGS. 9 and 11 is provided on the first and second connecting arms 33 and 43 that are rotatably connected. The click stop mechanism 81 is configured so that the joint members 31 and 41 can rotate relative to each other in a disposition state in which the joint members 31 and 41 have an obtuse angle of a predetermined angle on their front side, in other words, a state in which the joint members 31 and 41 can freely rotate. It is provided for temporary fixing. The click stop mechanism 81 is formed of a spring 82, a locking body 83, and one or more locking portions 84, for example.

  An accommodating cylinder portion 85 is formed on the arm portion 33 b of the first connecting arm 33. The accommodating cylinder portion 85 has an opening that is closed by an arm portion 43b that overlaps the arm portion 33b. A spring 82 is accommodated in the accommodating cylinder portion 85, and a locking body 83 is supported at the tip of the spring 82. The latching body 83 should just have a hemispherical surface, for example, the steel ball is used. The locking portion 84 is formed of a hemispherical recess formed on the back surface of the arm portion 43b. The engaging portion 84 is based on the angle at which the joint members 31 and 41 form an obtuse angle of a predetermined angle, for example, 110 °, in other words, based on the first joint member 31 when the joint members 31 and 41 are in a straight state. In this case, when the joint members 31, 41 are bent so that the second joint member 41 is raised by 70 ° with respect to the center line of the first joint member 31, the locking body 83 is accompanied by a sense of moderation. It is provided at the position to be fitted. The engagement of the locking body 83 with the locking portion 84 prevents the relative rotation of the first and second connecting arms 33 and 43 even if a rotational force of a predetermined value or less is applied, and both joints The members 31 and 41 are temporarily fixed. This temporary fixing is performed when the lock convex portion 56a is disposed in the escape portion 59, and since the locking body 83 is removed from the locking portion 84 at other times, it is not temporarily fixed.

  The temporary fixing force by the click stop mechanism 81 is defined by the spring force of the spring 82. This spring force is a light-weight suction tool prepared as an attachment separate from the floor suction port body 25, for example, when a round brush or a gap suction tool is replaced with the suction port body 25 for cleaning. In addition to being able to maintain the temporarily fixed state, when cleaning is performed using the suction port body 25, the temporary fixed state is set so as not to be formed regardless of whether or not the intake pipe 22 is used.

  For this reason, when cleaning is performed using a lightweight suction tool, the cleaning work can be performed by temporarily fixing the suction tool at an angle suitable for cleaning using the suction tool. Further, for example, as shown in FIG. 3, the suction port body is not hindered by the temporary fixing function by the click stop mechanism 81 when the suction port body 25 is lifted from the floor surface from the bent state. These joint members 31 and 41 can be relatively rotated so that the joint members 31 and 41 are in a straight line with a weight of 25.

  Reference numerals 86 and 87 in FIGS. 8 and 11 indicate auxiliary locking portions formed of hemispherical recesses formed on the back surface of the arm portion 43b. One auxiliary locking portion 86 is fitted with a locking body 83 when the lock convex portion 56 a is fitted into the first lock hole 57, so that the first lock state is established by the lock convex portion 56 a and the first lock hole 57. To assist. The other auxiliary locking portion 87 is fitted with the locking body 83 when the lock convex portion 56a is fitted into the second lock hole 58, and the second lock state is established by the lock convex portion 56a and the second lock hole 58. To assist. Note that these auxiliary locking portions 86 and 87 can be omitted.

  7 and 8, reference numeral 91 denotes a suction port that is inserted in series in an energization path (not shown) included in the intake air passage portion 15 when the pipe joint 17 is interposed in the intake air passage portion 15. A wiring assembly electrically connected to the electrical components of the body 25 is shown. The wiring assembly 91 is fixed to the insulation-coated electric wire 92, a terminal 93 made of a conductive pin holder fixed to one end of the electric wire 92 by soldering, and the other end of the insulation-coated electric wire 92 by soldering or the like. And a terminal 94 made of a conductive pin. The terminal 93 is covered with a cover 41 a and attached to the second connecting pipe part 42, and the terminal 94 is covered with a cover 31 a and attached to the first connecting pipe part 32.

  The insulated wire 92 passes through the joint portion of the cover 31a to the first connection pipe portion 32 and goes out of the cover 31a, and passes through the joint portion of the cover 41a to the second connection pipe portion 42 and goes out of the cover 41a. ing. The insulated wire 92 is wired outside the joint hose 50 and behind the first connecting arm 33 and the second connecting arm 43, and is covered by the first connecting arm 33 and the second connecting arm 43. It has been broken. The insulated wire 92 has a sufficient length so as not to hinder the relative rotation of the joint members 31 and 41. The insulated wire 92 may be wired behind the other first connection arm 34 and the second connection arm 44 and covered with the first connection arm 34 and the second connection arm 44, or one of the first connection arms 34 may be covered. It is also possible to separately wire the back side of the arm 33 and the second connection arm 43 and the other first connection arm 34 and second connection arm 44.

  In the configuration using the wiring assembly 91, the assembly 91 can be externally attached without passing the joint hose 50 or the first and second connecting pipe portions 32 and 42 in and out. That is, since wiring can be performed in a state where soldering or the like has been completed in advance, it is advantageous in assembling and is excellent in that wiring can be performed without fear of impairing air permeability. Furthermore, since the wiring assembly 91 is externally attached, the insulated sheathed electric wire 92 does not become a resistance when the joint hose 50 is bent as compared with the case where the wiring is performed along the inner periphery of the joint hose 50, and the joint hose 50 It is also preferable in that the length of the joint hose 50 can be shortened because it is not necessary to secure a wiring space for the electric wires.

  In order to attach the pipe joint 17 described above between the intake pipes 22 and 23 used as extension pipes, for example, the first connection pipe part 32 is fitted to the downstream end of the intake pipe 22 and connected. By connecting the second connecting pipe portion 42 to the upstream end portion of the intake pipe 23 and connecting them, both the intake pipes 22 and 23 can be connected to each other by the pipe joint 17.

  In normal cleaning, the pipe joint 17 is configured so that the lock device 55 is in the first locked state (that is, the locked state in which the lock protrusion 56a of the lock member 56 is inserted into the first lock hole 57). The members 31 and 41 are used in a standard state where they are linear. FIG. 2 shows a state in which the intake pipes 22 and 23 are connected via the pipe joint 17 in this state, and the intake pipes 22 and 23 are arranged on the extension lines of each other and are in a straight line. For this reason, it can clean in the form similar to the case where the intake pipes 22 and 23 are directly connected and the intake air passage 15 is assembled and cleaned.

  When cleaning the furniture under the legs such as the sofa A as shown in FIG. 3, the downstream side intake pipes 22 and 23 are bent around the pipe joint 17 after being connected by the pipe joint 17. Thus, an obtuse angle α may be formed between the intake pipes 22 and 23. By making the bend angle α, the suction port body 25 is prevented from being inclined so that the front end side of the suction port body 25 is further away from the floor surface, and an appropriate relationship of the suction port body 25 with respect to the floor surface is maintained. it can.

  In order to obtain the bent state, first, while holding the handle portion 24a of the intake pipe 24 with the right hand, the left hand is attached to the lower side of the pipe joint 17, and the push button 72 is pressed with the thumb of the left hand. The part 72b is pressed. As a result, the push button 72 is pushed in and the release legs 74 and 75 are individually inserted into the first and second lock holes 57 and 58, so the release leg 74 moves the lock projection 56 a from the first lock hole 57. The first lock state in which the first and second joint members 31 and 41 are fixed in a straight state is released by extrusion.

  Next, in this state, the intake pipe 23 is pushed down and brought to the floor surface, so that the first and second joint members 31 and 41 are bent at a desired angle and fitted to the connection pipe portions 32 and 42 to be connected. The intake pipes 22 and 23 that have been bent can be bent as shown in FIG. As a result, the relative positions of the arm portions 33b and 43b that are in contact with each other change, and the lock convex portion 56a removed from the first lock hole 57 fits into the escape portion 59. Therefore, the first and second joint members 31 , 41 are in a state where relative rotation is not hindered, and they can freely rotate without being restrained by each other.

  In a state where the joint members 31 and 41 make the bending angle α, the locking device 55 does not exhibit the locking function, so that the bending angle α can be arbitrarily changed by pressing the intake pipe 23 down. Accordingly, the height of the handle portion 24a depending on the width of the sofa A, the length of the leg, or the height of the user or the length of the hand can be cleaned at a folding angle α that is considered appropriate for cleaning by the user. That is, the lower part of the sofa A can be cleaned by setting the intake pipes 22 and 23 on the upstream side and the downstream side adjacent to each other to a desired folding angle α. For this reason, it is not necessary to lie down the entire intake air passage portion 15, and even if the user bends down, it can be light, and the user's fatigue can be reduced. Thereby, the bottom of the sofa A can be easily cleaned to every corner without difficulty.

  In this cleaning, even if the intake pipes 22 and 23 are bent until the arm portions 33b, 34b, 43b and 44b of the pipe joint 17 are in contact with the surface to be cleaned (floor surface), Due to the spacer action of the arm portions 33b, 34b, 43b, 44b, the intake pipe 22 disposed upstream of the pipe joint 17 and extending along the floor surface does not rub against the floor, and the joint hose 50 of the pipe joint 17 Do not rub the floor against the surface. For this reason, it is possible not only to easily push and pull the intake air passage portion 15 when cleaning the sofa A, but also to prevent the joint hose 50 from being worn.

  Moreover, since the joint hose 50 is bent in the use state in which the bending angle α is an obtuse angle as shown in FIG. 3, the upstream side connected to the first joint member 31 together with the first joint member 31 by the action to be restored. The intake pipe 22 is urged toward the floor surface. With this urging force, the suction port body 25 can be cleaned while being pressed so as not to leave the floor surface, so the dust absorption performance is good.

  When the suction port body 25 is separated from the floor surface after the intake pipes 22 and 23 are bent, the pipe joint 17 is naturally rotated by the weight of the suction port body 25 so as to be straight. For this reason, immediately after the lock convex portion 56a located in the escape portion 59 gets over the oblique surface 59a of the escape portion 59, the lock projection portion 56a is fitted into the first lock hole 57 by the biasing force of the spring 66. 17 is the first locked state described above. In this way, when the intake air passage portion 15 having the bending angle α is straightened, it is not necessary to operate the pipe joint 17 and it is convenient.

  In addition, the above effect | action is acquired similarly when the intake pipes 23 and 24 are connected through the pipe joint 17. FIG.

  As described above, as the suction port body 25 is lifted, the lock convex portion 56 a rides on the inclined surface 59 a of the escape portion 59 immediately before the intake air passage portion 15 in the bent state is naturally straightened. As a result, the inclined surface 59a becomes a resistance against the operation of the lock projection 56a entering the first lock hole 57, and the upstream first joint member 31 is rotated downward with respect to the second joint member 41 on the downstream side. The movement is braked. Then, immediately after receiving the deceleration action by the braking, the lock projection 56 a is fitted into the first lock hole 57. For this reason, it can suppress that the lock convex part 56a of the lock member 56 which is a small component fits into the 1st lock hole 57 vigorously, and these receive an excessive load. Accordingly, the durability of the lock member 56 and the like is high, and the reliability that the lock device 55 fixes the joint members 31 and 41 in a straight state over a long period of time is high.

  Further, FIG. 4 shows a case where the intake pipes 21 and 22 are connected to each other by the pipe joint 17 to clean a high place cleaning place such as the upper surface of the shelf B. In preparation for this cleaning, first, the pipe joint 17 is grasped from the upper side with the right hand, the push button 72 is pushed with the thumb of the right hand to perform the releasing operation of the first locked state, and in this state, the connection to the intake pipe 21 is performed. The first joint member 31 is grasped with the left hand and displaced to the back side, and the pipe joint 17 is bent so that an obtuse angle is formed on the back side of both the joint members 31 and 41. As a result, when the pipe joint 17 is bent approximately 45 ° from a straight state, the lock projection 56a removed from the first lock hole 57 is fitted into the second lock hole 58 by the biasing force of the spring 66, and the first The relative rotation of the second joint members 31, 41 is restricted.

  In the second locked state, the intake opening 25a of the intake port body 25 having the intake pipe 21 connected to the first joint member 31 is directed downward, even though the intake air passage portion 15 is used with the upward direction. Can be retained. Thereby, high place cleaning places, such as the upper surface of the shelf B, can be cleaned.

  After the completion of the high space cleaning, the second lock state in which the first and second joint members 31 and 41 are fixed in a bent state is released. In this case, the release leg 74 is pushed by pushing the push button 72 and inserting the release legs 74 and 75 into the first and second lock holes 57 and 58 in the same procedure as the preparation operation. Pushes out the lock projection 56a from the second lock hole 58, and the second locked state is released. Subsequently, by operating the pipe joint 17 so that the first and second joint members 31, 41 are straight, the lock projection 56 a removed from the second lock hole 58 is attached to the spring 66. By fitting into the first lock hole 57 by the force, the pipe joint 17 is in the first locked state described above.

  By using the pipe joint 17 attached to the intake air passage portion 15 as described above, in addition to the normal usage mode shown in FIG. 2, the usage mode suitable for cleaning the lower side of the furniture shown in FIG. The usage pattern can be obtained for the indicated high space cleaning. In addition, when a lightweight suction tool is used for the gap nozzle or the like instead of the suction port body 25 and the pipe joint 17 is bent from a straight state by a predetermined angle, for example, 70 °, the click stop mechanism 81 is functioned, Cleaning can be performed by holding a light suction tool in the gap nozzle or the like at this bending angle. Therefore, a variety of cleaning forms can be obtained.

  As described above, the pipe joint 17 having the above-described configuration has the lock projection 57a of the lock member 56 biased by the spring 66 unless the push button 72 is operated from the side as described above. Or 58 cannot be removed. For this reason, when the 1st or 2nd lock state is selected, the state can be maintained reliably and there is no possibility that free rotation will occur in the pipe joint 17 carelessly. Moreover, when the joint members 31 and 41 are rotated in the unlocked state, the lock projection 56a of the lock member 56 and the lock hole 57 or 58 do not slide and wear. Also in this respect, the locking device 55 is highly reliable for maintaining the joint members 31 and 41 in a fixed state over a long period of time.

  Moreover, the lock protrusion 56a and the first and second lock holes 57 and 58 into which the lock protrusion 56a is selectively inserted and removed are substantially rectangular having a long axis extending in the radial direction with respect to the rotation center of the arm portions 33b and 43b. Therefore, the pressure receiving surface in the locked state is flat and has a large area. Thereby, durability can be ensured, and also in this respect, the locking device 55 is highly reliable for maintaining the joint members 31 and 41 in a fixed state over a long period of time.

  In addition, the width of the arm portions 33b and 43b along the rotation direction is small as compared with the case where the lock projection 56a and the first and second lock holes 57 and 58 are circular. For this reason, even when the distance between the first and second lock holes 57, 58 is reduced, or when the distance between the holes is reduced as a result of providing three or more lock holes, the adjacent lock holes are not It is easy to maintain an interval necessary to withstand a predetermined load in a locked state between adjacent lock holes or between adjacent lock holes. This is advantageous in increasing the degree of freedom in designing the lock hole for the arm portion 43b.

  Further, the push button 72 of the pipe joint 17 is attached to the second connection arm 43 of the second joint member 41 connected to the downstream side intake pipe. For this reason, when both the joint members 31 and 41 are relatively rotated, the relative position between the hand holding the second joint member 41 and the push button 72 does not change. Therefore, it is preferable in performing the unlocking operation and the subsequent relative rotation operation of the joint members 31 and 41.

  Then, as described above, the lock protrusion 56a is fitted into the first lock hole 57 and the joint members 31, 41 are fixed straightly, and the lock protrusion 56a is second locked as described above. It is made under the condition that the joint members 31 and 41 are bent by being fitted into the hole 58 and making an obtuse angle of 135 ° on the back side thereof. That is, the locked state is formed at a plurality of different positions. Nevertheless, since a plurality of release legs 74 and 75 that are individually pushed into the plurality of lock holes are provided on the single push button 72, it is effective at that time by pressing the single push button 72. The locked state can be released. Thus, there is no need to provide a push button for each of the plurality of lock holes, and the lock can be released by sharing a single push button 72, so that the number of parts does not increase and the unlocking operation is simple. Is excellent.

  In addition, the pipe joint 17 having the above-described configuration includes one first and second connection arms 33 and 43 that are rotatably connected, and the other first and second connection arms that are also rotatably connected. 34 and 44 are arranged on the side of the joint hose 50 with the joint hose 50 in between. For this reason, when the push button 72 is pushed in to release the locked state with the hand attached to the state of grasping the locking device 55 as described above, the supporting force against the pushing force is given as the first and second supporting forces. It can give with the finger | toe which contact | connected the arm parts 34b and 44b of the connection arms 34 and 44. FIG. In this case, since the shapes of the arm portions 34b and 44b are large, the finger is surely hooked on them. For this reason, the pushing operation of the push button 72 can be facilitated.

  FIG. 14 shows a second embodiment of the present invention. Since the second embodiment is basically the same as the first embodiment, portions having the same configuration are denoted by the same reference numerals as the corresponding portions of the first embodiment, and the description thereof is omitted. A different part from 1st Embodiment is demonstrated. In this description, FIGS. 5 to 13 are also referred to as necessary.

  In the second embodiment, the intake pipe 24 functioning as a grip pipe and the second connection pipe portion of the pipe joint 17 are integrally formed, and the intake pipe is connected to the first connection pipe section 32 of the pipe joint 17. A lightweight suction tool such as an extension pipe in which 22 and 23 are combined so as to expand and contract, an intake pipe 21 of the suction port body 25, or a gap nozzle (not shown) is selectively attached.

  Accordingly, the pipe joint 17 provided in the intake pipe 24 so as not to be separated includes the first joint member 31, the pair of second connection arms 43 and 44, the flexible joint hose 50, and the lock device 55. is doing.

  The first joint member 31 includes a first connection pipe portion 32 through which the pair of first connection arms 33 and 34 and the suction port body 25 communicate. A pair of 2nd connection arms 43 and 44 are provided in the intake pipe 24 which functions as a grip pipe, and are connected with a pair of 1st connection arms 33 and 34 so that rotation is possible individually. The joint hose 50 is disposed between one of the first and second connection arms 33 and 43 and the other first and second connection arms 34 and 44, which are rotatably connected to each other. The first connection pipe portion 32 and the intake pipe 24 are communicated with each other.

  The lock device 55 includes a lock member 56, lock holes 57 and 58, and a push button 72 as a manual operator, for example. The lock member 56 is provided on at least one of the pair of first and second connection arms, for example, the first and second connection arms 33 and 43, and is biased by a spring 66. The lock holes 57 and 58 are fitted with the lock convex portions 56a of the lock member 56 when the angle formed by the first joint member 31 and the intake pipe 24 reaches a predetermined angle. The first joint member 31 and the intake pipe 24 are fixed, for example, in a straight state. The push button 72 is for releasing the lock projection 56 a of the lock member 56 from the lock hole 57 or 58 and releasing the fixation between the first joint member 31 and the intake pipe 24. The push button 72 is attached to a second connecting arm 43 that protrudes from the intake pipe 24. The configuration other than the points described above is the same as that of the first embodiment including the configuration not shown in FIG.

  For this reason, also in 2nd Embodiment, the subject of this invention can be solved similarly to 1st Embodiment. Moreover, since the pipe joint 17 is integrated with the intake pipe 24 that functions as a grip pipe, unlike the case of the attachment, there is no fear of the storage place of the pipe joint 17 being lost or lost.

1 is a partially exploded perspective view showing a vacuum cleaner provided with a pipe joint according to a first embodiment of the present invention. The side view which shows the 1st usage pattern of the vacuum cleaner of FIG. The side view which shows the 2nd usage pattern of the vacuum cleaner of FIG. The side view which shows the 3rd usage pattern of the vacuum cleaner of FIG. The perspective view which shows the pipe joint which concerns on 1st Embodiment of this invention. (A) is a top view which shows the pipe joint of FIG. FIG. 6B is a side view showing the pipe joint viewed from the direction of arrow F6B in FIG. FIG. 6C is a front view showing the pipe joint as viewed from the direction of arrow F6C in FIG. The perspective view which decomposes | disassembles and shows the pipe joint of FIG. The perspective view which decomposes | disassembles the pipe joint of FIG. 5, and is seen from a different direction from FIG. The cross-sectional top view which shows the pipe joint of FIG. FIG. 6 is a partially cutaway perspective view showing a part of the pipe joint of FIG. 5. The perspective view which decomposes | disassembles and shows a part of pipe joint of FIG. The back view which shows the 2nd connection arm with the lock hole which the pipe joint of FIG. 5 has. The perspective view which shows the lock member which the pipe joint of FIG. 5 has. The vacuum cleaner provided with the pipe joint which concerns on 2nd Embodiment of this invention is partially disassembled and shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Electric vacuum cleaner, 12 ... Vacuum cleaner main body, 13 ... Suction inlet, 14 ... Electric blower, 15 ... Intake air passage part, 17 ... Pipe joint, 21 ... Intake pipe, 22 ... Intake pipe, 23 ... Intake pipe, 24 ... intake pipe (grip pipe), 25 ... suction inlet, 25a ... suction opening, 26 ... intake hose, 27 ... connection pipe, 31 ... first joint member, 32 ... first connection pipe section, 33, 34 ... first Connecting arm, 35 ... Pivot convex part, 36 ... Screw, 37 ... Clamping nut, 38 ... Lock nut, 39 ... Fitting hole, 41 ... Second joint member, 42 ... Second connecting pipe part, 43, 44 ... Second Connecting arm, 45 ... fitting tube, 46 ... pivot projection, 47 ... screw, 48 ... clamping nut, 49 ... washer, 50 ... joint hose, 55 ... lock device, 56 ... lock member, 56a ... lock projection, 57 ... 1st lock hole, 58 ... 2nd lock hole, 59 ... Escape part, 59 ... Oblique surface (braking part), 60... Lock part cover, 65... Housing part, 66 .. spring (elastic member), 72 .. push button (manual operator), 72 a. ... Release leg , 81 ... Click stop mechanism, 82 ... Spring, 83 ... Locking body, 84 ... Locking part, 85 ... Housing cylinder part, 86 ... Auxiliary locking part

Claims (6)

Two pipes that are detachably connected to each other by forming an extension pipe in the intake air passage section that communicates the suction opening body or a lightweight suction tool that is used in exchange for this suction opening body and the suction opening of the cleaner body. A pipe joint for an electric vacuum cleaner that connects an upstream side intake pipe and a downstream side intake pipe that are disposed relatively upstream and downstream of both of the intake pipes. And
A first joint member having a pair of first connection arms and a first connection pipe portion detachably connected to the upstream side intake pipe;
A second joint member having a pair of second connection arms that are individually pivotably connected to the pair of first connection arms, and a second connection pipe portion that is detachably connected to the downstream side intake pipe; ,
A pair of first and second connecting arms connected to each other on the side, a flexible joint hose disposed between the connecting arms and communicating with the first and second connecting pipes; ,
Arrangement state provided on at least one of the pair of first and second connecting arms, fixing the joint members in a linear arrangement state, and forming the obtuse angle on the front side of the joint members. And a locking device that allows relative rotation of these joint members,
Comprising
The locking device is attached to a connecting arm closer to the joint hose among the first and second connecting arms and is urged by an elastic member toward the other connecting arm, and the other connecting A lock hole that is provided on an arm and into which the lock member fits in a state in which both the joint members are arranged in a straight line, and the other connection arm is provided with a hole or a recess, and relative rotation of the both joint members is allowed. In this state, the lock member is movably fitted into the lock hole, and a relief portion having a slidable braking portion is brought close to the lock hole, and the lock member is pushed from the side and operated from the lock hole. a has a manual operator for the unlocking extruded,
Temporarily fixing the relative rotation of the two joint members to the first and second connecting arms in a state where the first and second joint members have an obtuse angle of a predetermined angle on their front side. A click stop mechanism having a spring that regulates the temporarily fixing force,
The spring can be temporarily fixed by the click stop mechanism when the suction tool is used, and the temporary stop state by the click stop mechanism is not formed when the suction port is used. Pipe fittings for electric vacuum cleaners with specified spring force .   2. The vacuum cleaner pipe joint according to claim 1, wherein the braking portion is formed as an oblique surface that serves as a resistance of the locking member fitting operation from the relief portion to the lock hole. The pipe joint for a vacuum cleaner according to claim 1 or 2, wherein the click stop mechanism includes a spring housed in a housing cylinder portion formed on the first connecting arm, and a latch supported by a tip of the spring. A body and a recess formed on the second connecting arm and engaging and disengaging the locking body. 4. The vacuum cleaner connecting pipe according to claim 3 , wherein when the lock member is fitted in the lock hole and the first and second joint members are in a straight line, the locking member is in a standard state. An auxiliary locking portion with which the body is fitted is provided on the second connecting arm. A vacuum cleaner body with a built-in electric blower,
A suction port having a suction opening for sucking dust;
A plurality of intake pipes that are detachably connected to each other, and an intake air passage portion that communicates the suction port body and the suction port of the cleaner body;
An upstream side intake pipe and a downstream side intake pipe, which are disposed relatively upstream and downstream in each of the intake pipes, are connected to each other and are detachably attached to the intake air passage portion. The pipe joint according to any one of 1 to 4, and
A vacuum cleaner comprising: Connect the connection pipe that the intake hose has at one end to the suction port of the main body of the vacuum cleaner with the built-in electric blower, and the grip pipe with the pipe joint that the intake hose has at the other end has a suction opening that sucks in dust. A vacuum cleaner that communicates with the suction port body or a lightweight suction tool that is used in exchange for this suction port body, and performs cleaning by operation of the electric blower,
The pipe joint is
A first joint member having a first connection pipe portion through which the pair of first connection arms and the suction port body communicate with each other;
A pair of second connection arms provided on the grip tube and individually pivotably connected to the pair of first connection arms;
A pair of first and second coupling arms coupled to each other, and a flexible joint hose disposed between the coupling arms and communicating the first connection pipe portion and the grip pipe; ,
Provided on at least one of the pair of first and second connecting arms, and fixing the first connection pipe part and the grip pipe in a linear arrangement state, and the first connection pipe part and the A locking device that allows relative rotation of the first connecting pipe portion and the grip pipe in an arrangement state in which the grip pipe forms an obtuse angle on the front side thereof;
Comprising
The locking device is attached to a connecting arm closer to the joint hose among the first and second connecting arms and is urged by an elastic member toward the other connecting arm, and the other connecting A lock hole into which the lock member is fitted in a state in which the first connection pipe portion and the grip pipe are arranged in a straight line on the arm, and the first connection pipe provided on the other connecting arm by a hole or a recess. A relief portion having a braking portion that is slidably fitted into the lock hole and is slidable with the lock member in a state where relative rotation between the grip portion and the grip tube is permitted, and It has a manual operation element which is pushed from the side and pushes out the lock member from the lock hole to release the lock,
Temporarily fixing the relative rotation of the two joint members to the first and second connecting arms in a state where the first and second joint members have an obtuse angle of a predetermined angle on their front side. A click stop mechanism having a spring that regulates the temporarily fixing force;
The spring can be temporarily fixed by the click stop mechanism when the suction tool is used, and the temporary stop state by the click stop mechanism is not formed when the suction port is used. A vacuum cleaner with a specified spring force .

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