JP2005176873A - Pipe fitting for vacuum cleaner and vacuum cleaner - Google Patents

Abstract

An electric cleaning system that can change the use form of an intake air passage portion according to a situation such as a height of a user and a cleaning place, and has excellent durability of a lock device that maintains the intake air passage portion in a predetermined state. It is to provide a machine pipe joint.
First and second connecting pipe portions 32 and 42 that are in communication with each other via a flexible joint hose 50 and are rotatably connected to each other. A locking device 55 for controlling the relative rotation of the joint member 31.41 is provided in the pair of first and second connecting arms 33, 34, 43, 44 of the joint members 31.41 that are rotatably connected to each other. Provided on at least one of 33,34. The lock device 55 is engaged with the lock member 56 when the angle formed between the lock member 56 and the joint members biased by the spring (elastic member) 66 becomes a predetermined angle, and the joint members 31.41 are A lock hole 57.58 for fixing, and a push button (manual operation element) 72 for releasing the lock member 56 from the lock hole 57.58 and releasing the fixation of both joint members 31.41 are provided.
[Selection] Figure 8

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 an end of an arm 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 part 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 a plurality of fixing positions of both pipes are provided.
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. However, there is no teaching in Patent Document 1 regarding these points.

  The problem to be solved by the present invention is that a lock device that can change the usage pattern of the intake air passage portion to suit the situation of the user's height, cleaning place, etc., and maintain the intake air passage portion in a predetermined state. An object of the present invention is to provide a vacuum cleaner pipe joint and a vacuum cleaner that are excellent in durability.

  The pipe joint for a vacuum cleaner according to the present invention includes first and second connecting pipe portions that communicate with each other via a flexible joint hose, and are connected to each other in a rotatable manner. At least one of a pair of first and second connecting arms of the first and second joint members that are pivotably connected to each other is provided as a lock device that controls the relative rotation between the second joint members. Provided. The lock device includes a lock member that is urged by an elastic member, a lock hole that is fitted to the lock member and fixes the joint member when the angle formed between the joint members is in a desired state. A manual operation element is provided on the side of the hose to remove the lock member from the lock hole and release the joint members.

  The pipe joint of the present invention is used by connecting these intake pipes between the upstream intake pipe and the downstream intake pipe in the intake air passage section. In this pipe joint, the first and second joint members are released by operating the manual operation element of the lock device from the side to release the lock member from the lock hole. The intake air passage portion can be used in a state in which the angle formed by the joint member is freely changed. When the first and second joint members make a predetermined angle, the lock member urged by the elastic member fits into the lock hole and the both joint members are fixed. The intake air passage can be used with the For this reason, the usage pattern of the intake air passage portion can be changed according to the situation such as the height of the user and the cleaning place.

  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, since the lock member and the lock hole do not slide and wear each other, there is a high reliability that the lock device maintains both the joint members in a fixed state for a long period of time.

  In this invention, when the manual operation element is attached to the second connecting arm of the second joint member connected to the downstream side intake pipe, the second joint is rotated when both the joint members are relatively rotated. Since the relative position between the hand holding the member and the manual operation element does not change, it is preferable in performing the unlocking operation and the subsequent relative rotation operation of both joint members.

  According to the present invention, not only can the intake air passage portion be used by selecting a state in which both joint members form a predetermined angle, but also the intake air passage portion can be selected by selecting a state in which the angle formed by both joint members can be freely changed. It is possible to change the usage pattern of the intake air passage section to suit the situation of the user's height, cleaning place, etc. and the wear of the lock device is low, so the intake air passage section is in a predetermined angle state Therefore, it is possible to provide a vacuum cleaner pipe joint and a vacuum cleaner excellent in durability of the lock device to be maintained.

  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. The suction port body 25 may incorporate a rotary cleaning body that is rotated by suction air, or 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 operating member 30 for fixing the connection and releasing the fixing is passed.

  The first connecting arms 33 and 34 are cantilevered at the other axial end 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. These arm portions 33b and 34b 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. For this purpose, the lower edge of the arc shape is formed so as to protrude most downward in the pipe joint 17.

  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. The arm portions 43b and 44b also 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. For this purpose, the arc-shaped lower edge (shown on the upper side in FIG. 6 (B)) is formed so as to protrude 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-described size. It is preferable in that it can be secured largely. Further, the fact that the arm portions 33b, 34b, 43b, and 44b are circular in the size described above covers the connecting portion between the first joint member 31 and the second joint member 41 so that the appearance of the pipe joint 17 is not visible. It is preferable in terms of safety, and it is also preferable in terms of safety because it is possible to prevent objects from being caught in the connecting portion.

  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. In order to effectively use this restoring force, it is preferable to provide the joint hose 50 over both the connecting pipe portions 32 and 42 in a stretched state.

  The state where the first and second joint members 31 and 41 are connected is shown in FIGS. 5 and 6A, 6B, and the like. As shown in FIGS. 6B and 9, the distal ends of the arm portions 43 b and 44 b disposed on the outer side with respect to the pair of arm portions 33 b and 34 b are both first connected. It overlaps with the outer side surfaces (surfaces) of the base portions 33a, 34a of the arms 33, 34. Thereby, in the operation of the pipe joint 17, when an external force in a direction in which the arm parts 43 b and 44 b of the lock device 55 approach each other is received in accordance with the unlocking operation described later, the pipe joint 17 is cantilevered by the second connection pipe part 42. The arm portions 43b and 44b of the second connecting arms 43 and 44 are substantially supported at both ends. Accordingly, it is possible to prevent the inner arm portions 33b and 34b from being bent through the arm portions 43b and 44b and to interfere with the joint hose 50 so as to pinch the joint hose 50, and the arm portions 33b and 34b. , 43b, 44b can be prevented from being difficult to perform the unlocking operation.

  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. Since it is difficult to reduce the intake performance of the vacuum cleaner 11, it is also preferable in that the clogging of the pipe joint 17 can be suppressed. The joint hose 50 includes the arm portions 33b and 43b of one of the first and second connection arms 33 and 43 that are rotatably connected to each other, and the other first and second that are also rotatably connected to each other. The connecting arms 34 and 44 are disposed between the arm portions 34b and 44b. 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 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 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 FIG. 11 and the like, the first lock hole 57, the second lock hole 58, and the escape portion 59 are on the movement locus of the lock convex portion 56a when the joint members 31, 41 are relatively rotated. It is located and provided in the arm part 43b of the 2nd connection arm 43 which the 2nd joint member 41 had.

  Both the first and second lock holes 57 and 58 are formed by holes corresponding to the shape of the lock projection 56a. 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, 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. An end portion of the escape portion 59 on the first lock hole 57 side is formed with an oblique surface 59a.

  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, It is preferable in that the sliding resistance can be eliminated to relatively smoothly rotate the joint members 31 and 41, and the wear of the lock projection 56a can be prevented to ensure the durability of the lock device 55. However, in the present invention, the escape portion 59 made of a hole or a recess can be omitted. In this case, when both the joint members 31 and 41 are relatively rotated with an obtuse angle formed on their front side (upper side), the edge of the first lock hole 57 corresponds to the movement locus of the lock projection 56a. The flat surface of the arm portion 43b that continues to the above is used as a relief portion.

  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, in a freely rotatable state. 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.

  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. For this reason, 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.

  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. On the other hand, when the push button 72 is attached to the first joint member 31 on the upstream side, the second and second joint members 31 and 41 are moved in accordance with the rotation of the first and second joint members 31 and 41. Since the relative position between the hand holding the joint member 41 and the push button 72 changes, the hand holding the second joint member 41 competes against the arm portion and rubs against it, which is not preferable.

  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. 12 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.

  The flexible joint hose 50 used in the second embodiment is formed of a single groove in which a groove portion opened inside is continuous in a spiral shape. By wiring the insulation-coated electric wire 92 in the groove portion, the insulation-coated electric wire 92 is wired along the inner periphery of the joint hose 50. Therefore, both ends of the insulated wire 92 are led out through the joint hose 50 or the first and second connecting pipe portions 32 and 42 and soldered to the terminals. Configurations other than those described above are the same as those in the first embodiment, including configurations not shown in FIG.

  For this reason, also in 2nd Embodiment, the subject of this invention can be solved similarly to 1st Embodiment. In addition, since the insulation-coated electric wire 92 is wired along the inner periphery of the joint hose 50, the insulation-coated electric wire 92 is prevented from being visually recognized, and the appearance is preferable. It is preferable in that there is no fear of rubbing or rubbing. Further, when the joint hose 50 is bent, the insulation-coated electric wire 92 that is spirally wired is also bent in the same manner, so that the reaction force is taken into consideration and the urging force of the suction port body on the floor surface is increased. be able to.

  FIG. 13 shows a third embodiment of the present invention. Since the third embodiment is basically the same as the first embodiment, parts having the same configuration are denoted by the same reference numerals as the corresponding parts of the first embodiment, and the description thereof is omitted. A different part from 1st Embodiment is demonstrated. In this description, FIG. 9 and the like are also referred to as necessary.

  In the third embodiment, the first and second joint members 31 and 41 are jointed with respect to a rotation center line (axis extension lines that coincide with each other of the screws 36 and 47) L1 when the first and second joint members 31 and 41 are relatively rotated. The hose 50 is perpendicular to the center line L2 at a height position where the center line L2 is displaced downward (see FIG. 9). A displacement amount is indicated by a symbol D in FIG. 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 3rd Embodiment, the subject of this invention can be solved similarly to 1st Embodiment. Moreover, since the pivot center line L1 of the pipe joint 17 and the center line L2 of the joint hose 50 are shifted in the vertical direction as described above, the first and second joint members 31 and 41 form an obtuse angle on the upper side. When the joint hose 50 is bent, the joint hose 50 is contracted more densely on the contraction side (upper side), and is stretched longer on the extension side (lower side) of the joint hose 50. Thereby, since the repulsive action which tries to cancel shrinkage and the repulsive action which tries to cancel elongation increase, respectively, the restoring force which tries to return the pipe joint 17 to a straight state is increased, and the floor surface of the suction port body is increased. It is preferable at the point which can improve closeness.

  FIG. 14 shows a fourth embodiment of the present invention. Since the fourth embodiment is basically the same as the first embodiment, parts having the same configuration are denoted by the same reference numerals as the corresponding parts of the first embodiment, and the description thereof is omitted. A different part from 1st Embodiment is demonstrated. In this description, FIGS. 5 to 11 are also referred to as necessary.

  In the fourth 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. 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 4th 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 partially notched perspective view which shows a part of pipe joint which concerns on the 2nd Embodiment of this invention. The front view which shows the pipe joint which concerns on the 3rd Embodiment of this invention seeing from the downstream. The perspective view which partially decomposes and shows the vacuum cleaner provided with the pipe joint which concerns on 4th Embodiment of this invention.

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 33a, 34a ... Root part, 33b, 34b ... Arm part, 35 ... Pivot, 36 ... Screw, 37 ... Tightening nut, 38 ... Lock nut, 39 ... Fitting hole, 41 ... Second joint member, 42 ... second connecting pipe portion, 43, 44 ... second connecting arm, 43a, 44a ... root portion, 43b, 44b ... arm portion, 45 ... fitting tube, 46 ... pivot projection, 47 ... screw, 48 ... tightening Nut, 49 ... Washer, 50 ... Fitting hose, 55 ... Locking device 56 ... Lock member, 56a ... Lock convex part, 57 ... First lock hole, 58 ... Second lock hole, 59 ... Relief part, 60 ... Lock part cover, 65 ... Storage part, 66 ... Spring (elastic member), 72 ... push button (manual operation element), 72a ... spindle, 73 ... spring, 74, 75 ... release leg, 81 ... click stop mechanism, 82 ... spring, 83 ... locking body, 84 ... locking portion, 91 ... Wiring assembly, 92 ... insulated coated wire, 93,94 ... terminal

Claims (11)

A plurality of intake pipes that are detachably connected to each other, provided in an intake air passage section that communicates the suction port body and the suction port of the cleaner body, and relatively upstream of each of the intake pipes A pipe joint for a vacuum cleaner that connects an upstream side intake pipe and a downstream side intake pipe that are arranged on the downstream side in a communicating state,
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 flexible joint hose disposed between the pair of first and second coupling arms coupled to each other and communicating the first and second connecting pipe portions;
The lock member provided on at least one of the pair of first and second connecting arms and urged by an elastic member, and the lock when the angle formed between the joint members becomes a predetermined angle. A lock hole that is fitted to a member to fix the joint member, and a manual operation element that is provided on a side of the joint hose and that removes the lock member from the lock hole to release the joint member. Locking device,
A pipe joint for a vacuum cleaner comprising:   The pipe joint for vacuum cleaners of Claim 1 WHEREIN: The said manual operation element is attached to the 2nd connection arm of a said 2nd joint member.   The pipe joint for an electric vacuum cleaner according to claim 1 or 2, wherein the second connection arm cantilevered by the second connection pipe part is cantilevered at the tip part by the first connection pipe part. Further, the first connection arm is covered with the outer surface of the root of the first connection arm.   The pipe joint for a vacuum cleaner according to any one of claims 1 to 3, wherein the manual operating element is rotatably attached to the second connecting arm about a support shaft of the operating element. And a pressing operation portion provided close to the root portion of the second connection arm with respect to the rotation center of the pair of first and second connection arms.   The pipe joint for electric vacuum cleaners according to any one of claims 1 to 4, wherein the lock device includes a lock member biased by an elastic member, and the lock member is fitted into the two joint members. A first lock hole that is fixed in a linear arrangement state, and a clearance portion that allows the lock member to move in an arrangement state in which the joint members form an obtuse angle on the front side thereof and allows the relative rotation of the joint members. And a second lock hole that fits the lock member and fixes the joint members in an arrangement state in which a predetermined obtuse angle is formed on the back side thereof.   The pipe joint for a vacuum cleaner according to any one of claims 1 to 5, wherein the two joint members are arranged in a state in which an obtuse angle of a predetermined angle is formed on the front side thereof. A click stop mechanism for temporarily fixing the movement is provided between the first and second connecting arms.   The pipe joint for a vacuum cleaner according to any one of claims 1 to 6, wherein a center line of the joint hose orthogonal to a pivot center line of the both joint members is below the pivot center line. It is shifted to the side.   The pipe joint for electric vacuum cleaners according to any one of claims 1 to 7, wherein the first and second terminals are individually attached to the first and second connection pipe portions, respectively. Insulated coated electric wires having both ends connected to these terminals are wired outside the joint hose and covered with at least one of the first and second connecting arms.   The pipe joint for electric vacuum cleaners according to any one of claims 1 to 7, wherein the first and second terminals are individually attached to the first and second connection pipe portions, respectively. Insulated coated electric wires having both ends connected to these terminals are wired inside the joint hose. 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 in a communicating state and are detachably attached to the intake air passage portion. The pipe joint according to any one of 1 to 9,
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 an intake opening for sucking dust A vacuum cleaner that communicates with the 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 flexible joint hose disposed between a pair of first and second coupling arms coupled to each other and communicating the first connection pipe portion and the grip pipe;
When a lock member provided on at least one of the pair of first and second connecting arms and urged by an elastic member, and an angle formed by the first joint member and the grip tube becomes a predetermined angle. A lock hole that is fitted to the lock member to fix the first joint member and the grip tube, and is provided on a side of the joint hose, and the lock member is removed from the lock hole to remove the first joint member. And a locking device having a manual operator for releasing the fixation between the grip tube and the grip tube,
It has.

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