JP2010162083A - Hinge mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge mechanism capable of improving the convenience by disposing a rotor at a desired position. <P>SOLUTION: The hinge mechanism is configured to support the rotor 51 to a base body 32 turnably around a turning shaft 51a. The rotor 51 turns between first and second turning positions relative to the base body 32. The rotor 51 is integrated with a resilient member 52 made of the same member as the rotor 51 by resin molding or the like for urging the rotor in the direction of the first turning position. The rotor 51 has an opening 51e which is opened in one surface parallel to the turning shaft 51a and through which the base body 32 passes by the turning. The resilient member 52 has an S-shaped part 52a which meanders in the S-shape from the front end of the opening 51e to extend on the inner side of the range of turning of the front end of the base body 32. The rotor 51 is turned as the rear end of the S-shaped part 52a slides on an end face 32a of the base body 32 composed of an inclined surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hinge mechanism that rotatably supports a rotating body on a base.

  A vacuum cleaner having a conventional hinge mechanism is disclosed in Patent Document 1. In this electric vacuum cleaner, a suction port body is disposed below a main body portion that houses an electric blower. The suction port body has an intake port facing the floor surface, and communicates with the electric blower. A detachable extension pipe is attached to the main body so as to extend upward, and a grip portion is provided on the upper part of the extension pipe. Thereby, it is possible to clean the grip by moving the suction port together with the main body while gripping the grip.

  One end of the extension pipe is connected to the main body via a connection hose. Thereby, the extension pipe which hold | gripped the holding | grip part and was detached | desorbed from the main-body part can be moved independently of a suction inlet body. And it can inhale from the front-end | tip of an extension pipe, and can clean a clearance gap etc. of a ceiling or furniture.

  A brush holding portion that holds a brush and rotates by a hinge mechanism is provided at the tip of the extension pipe. The hinge mechanism is formed by fitting a shaft hole provided in a brush holding portion which is a rotating body to a boss which is a rotating shaft protruding from an extension pipe which is a base. As a result, the brush holding portion can be gripped and rotated about 180 °.

  When the extension pipe is detached from the main body, the brush holding part is disposed in front of the opening of the tip of the extension pipe, and is used while being inclined at a desired angle with respect to the extension pipe according to the surface to be cleaned. Further, the extension pipe can be accommodated in the main body by rotating the brush holding portion so that the brush is arranged upward.

Japanese Patent Laying-Open No. 2005-87508 (pages 4-9, FIG. 7)

  However, according to the conventional electric vacuum cleaner, the user holds the brush holding portion when the brush provided on the extension pipe is used, and is rotated from the storage position to the use position. Further, the brush holding portion is gripped during storage and rotated from the use position to the storage position. For this reason, when the brush holding part which is a rotation body is arrange | positioned in a desired position with respect to a base | substrate, the operation | work by a user is required. Therefore, there is a problem that the convenience of the vacuum cleaner is poor.

  An object of this invention is to implement | achieve easily the hinge mechanism which can arrange | position a rotary body in a desired position with respect to a base | substrate, without requiring the operation | work by a user.

In order to achieve the above object, the present invention provides a hinge mechanism for rotatably supporting a rotating body on a base by a rotating shaft, wherein the rotating body is in first and second rotational positions with respect to the base. An elastic member that rotates between them and biases the rotating body in the direction of the first rotating position is integrally provided by the same member as the rotating body,
The rotating body has an opening parallel to the rotating shaft and has an opening through which the base passes, and the elastic member meanders in an S-shape from the front end of the opening and the front end of the base And an S-shaped portion extending inwardly within the rotation range, and a rear end of the S-shaped portion slides on an end surface of the base body formed of an inclined surface to rotate the rotating body. .

  According to this configuration, the elastic member is formed integrally with the rotating body by resin molding or the like, and the rotating body is pivotally supported on the base body by the hinge mechanism. The rotating body rotates between the first rotating position and the second rotating position, and is biased in the direction of the first rotating position by the elastic member. When turning force is applied to the rotating body, the rotating body rotates from the first rotation position to the second rotation position against the urging force of the elastic member. When the rotational force is removed, the rotating body is arranged at the first rotating position by the biasing force of the elastic member.

  An S-shaped portion is formed on the elastic body continuously with the opening parallel to the rotational axis of the rotational body. When the rotating body rotates about the rotating shaft with respect to the base by applying the turning force, the rear end of the S-shaped portion slides on the end surface formed by the inclined surface of the base. As a result, the base body rotates relative to the rotating body and passes through the opening. Since the rear end of the S-shaped portion is disposed inside the rotation range of the front end of the base body, the rear end of the S-shaped part is slid and pushed open by the relative rotation of the base body. Thereby, the S-shaped portion urges the rotating body to the first rotating position, and the rotating body is arranged at the second rotating position against the urging force. When the rotational force is removed, the rotating body returns to the first rotating position by the elasticity of the S-shaped portion.

  According to the present invention, in the hinge mechanism configured as described above, the base has an end face open, the elastic member bends from the rear end of the S-shaped part, and is narrower than the S-shaped part at the first rotation position. It has a bending part arranged inside the end face of the base. According to this configuration, when the rotating body rotates from the first rotation position to the second rotation position, the bent portion slides on the end surface composed of the inclined surface of the base body and then the bent portion is the peripheral edge of the base body. To slide.

  According to the present invention, in the hinge mechanism configured as described above, the base is formed at an obtuse angle with respect to a turning radius connecting a front end that slides with the S-shaped part and the turning shaft, and slides with the bent part. It has the flat part to perform. According to this configuration, when the rotational force of the rotating body is removed at the second rotating position, the rotating body is returned to the first rotating position by the circumferential component of the elastic force that presses the flat surface portion.

  According to the present invention, in the hinge mechanism configured as described above, the elastic member is formed of a resin molded product formed integrally with the rotating body.

  According to the present invention, since the elastic member that urges the rotating body in the direction of the first rotating position is integrally formed by the same member as the rotating body, the rotating body is not moved by the user with respect to the base body. A hinge mechanism that can be arranged at the first rotation position can be easily realized.

The perspective view which shows the vacuum cleaner of embodiment of this invention The front view which shows the vacuum cleaner of embodiment of this invention Side surface sectional drawing which excluded the suction inlet of the vacuum cleaner of embodiment of this invention The perspective view which shows the state which removed the portable part of the vacuum cleaner of embodiment of this invention integrally with the extension pipe. Side surface sectional drawing which shows the state which removed the portable part of the vacuum cleaner of embodiment of this invention integrally with the extension pipe The perspective view which shows the state which removed the portable part of the vacuum cleaner of embodiment of this invention. Side surface sectional drawing which shows the state which removed the portable part of the vacuum cleaner of embodiment of this invention The side view which shows the portable part of the vacuum cleaner of embodiment of this invention Side surface sectional drawing which shows the principal part of the portable part of the vacuum cleaner of embodiment of this invention The side view which shows the portable part of the vacuum cleaner of embodiment of this invention The side view which shows the state distribute | arranged to the accommodation position of the brush holding part of the front-end | tip of the extension pipe of the vacuum cleaner of embodiment of this invention The top view which shows the state distribute | arranged to the accommodation position of the brush holding part of the front-end | tip of the extension pipe of the vacuum cleaner of embodiment of this invention CC sectional view of FIG. AA sectional view of FIG. BB sectional view of FIG. Side surface sectional drawing which shows the state distribute | arranged to the cleaning position of the brush holding part of the front-end | tip of the extension pipe of the vacuum cleaner of embodiment of this invention The side view which shows the state distribute | arranged to the cleaning position of the brush holding part of the front-end | tip of the extension pipe of the vacuum cleaner of embodiment of this invention Side surface sectional drawing which shows the state distribute | arranged to the cleaning position of the brush holding part of the front-end | tip of the extension pipe of the vacuum cleaner of embodiment of this invention The perspective view which shows the use condition which carried the portable part integral with the extension pipe of the vacuum cleaner of embodiment of this invention. The perspective view which shows the use condition which carried the portable part of the vacuum cleaner of embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a vacuum cleaner according to an embodiment. The vacuum cleaner 1 is configured as an upright type, and includes a main body 4 that houses an electric blower 2 and a dust collecting unit 3 (see FIG. 3 for both). A suction port body 5 having an air inlet (not shown) facing the floor surface is provided below the main body portion 4, and the main body portion 4 can be tilted with respect to the suction port body 5.

  A detachable extension pipe 6 extends in the vertical direction above the main body 4. A removable portable part 31 is provided above the extension pipe 6. The portable unit 31 is provided with a grip 8 that is gripped by a user. The portable part 31 and the main body part 4 are connected by a telescopic connection hose 7.

  Thereby, the portable part 31 grips the grip part 8 in a state of being attached to the main body part 4 via the extension pipe 6 and moves integrally with the suction port body 5. Moreover, the portable part 31 becomes portable in the state removed from the extension pipe 6 and the state removed from the main body part 4 together with the extension pipe 6, and grips the grip part 8 and moves it independently from the suction port body 5. be able to.

  FIG. 2 shows a front view of the vacuum cleaner 1, and FIG. 3 shows a side cross-sectional view of the vacuum cleaner 1 with the suction port body 5 omitted. In the main body 4, a dust collection unit 3 is arranged below the electric blower 2 in communication. The suction port body 5 and the dust collecting part 3 communicate with each other through an air flow path 4 a provided in the main body part 4. The dust collection unit 3 has a dust collection container 3a and is of a cyclone type that separates dust by a swirling airflow. The front panel 4d of the main body 4 can be opened and closed by gripping the handle 4e, and the dust collecting container 3a that collects dust together with the front panel 4d can be attached and detached.

  An air flow path 4 b that opens at the upper surface and communicates with the dust collection unit 3 is provided at the rear of the main body unit 4. The air flow path 4 b is arranged in parallel with the air flow path 4 a and communicates with the electric blower 2. A lower support portion 4c into which the lower end of the connection hose 7 is fitted is formed at the upper end of the air flow path 4b. The lower portion of the connection hose 7 is supported substantially vertically by the lower support portion 4c. The upper end of the connection hose 7 is fitted into an upper support part 31 a provided in the portable part 31.

  A hook 6 f is provided at the rear portion of the extension pipe 6. An annular holding portion 20 (see FIG. 1) inserted through the connection hose 7 is locked to the hook 6f so that the connection hose 7 can be held.

  Between the electric blower 2 and the air flow path 4b, an extension pipe housing part 4f that opens the upper surface of the main body part 4 is provided. The extension pipe storage portion 4f stores the distal end portion of the extension pipe 6, and the extension pipe 6 can be detached from the main body portion 4 as shown in FIGS.

  In FIG. 5, the extension pipe 6 is configured as a double pipe, and an extension pipe 32 is fitted into the outer cylinder 30. When the extension pipe 6 is detached from the main body 4, the extension pipe 6 can be extended by pulling out the extension pipe 32 from the tip of the outer cylinder 30. A brush holding portion 51 having a brush 50, which will be described in detail later, is rotatably disposed at the distal end of the extension pipe 32.

  Moreover, the portable part 31 can be detached from the extension pipe 6 as shown in FIGS. Thereby, the portable part 31 can be removed in the state which attached the extension pipe 6 to the main-body part 4. FIG.

  In FIG. 7, the portable part 31 has the air flow path 31b connected to the upper support part 31a inside. The connection hose 7 and the outer cylinder 30 of the extension pipe 6 communicate with each other via an air flow path 31b. Thereby, the extension pipe 6 extends the air flow path 31 b communicating with the connection hose 7.

  A brush holding unit 41 is rotatably disposed at the tip of the portable unit 31. The brush holding portion 41 has an opening 41b at the tip, and the brush 40 is disposed around the opening 41b. A storage portion 6 a for storing the brush holding portion 41 is provided along the outer cylinder 30 in the extension pipe 6. The brush holding portion 41 is pivotally supported by a rotation shaft 41a perpendicular to the air flow path 31b, and an elastic member 42 formed of a torsion spring that urges the brush holding portion 41 clockwise is provided in the drawing.

  Therefore, when the portable part 31 is detached from the extension pipe 6 and taken out from the storage part 6a, the brush holding part 41 is rotated and arranged at the cleaning position as shown in FIG. At this time, the brush holding portion 41 is placed at a predetermined angle in contact with a stopper 31c (see FIG. 9) provided on the portable portion 31.

  When the portable part 31 is attached to the extension pipe 6, the tip of the brush holding part 41 slides against the inner wall 6b (see FIG. 7) of the storage part 6a against the urging force of the elastic member 42. Thereby, the brush holding | maintenance part 41 is distribute | arranged to the accommodation position shown in FIG. 7, and is accommodated in the accommodating part 6a.

  FIG. 9 shows a side cross-sectional view of the main part of the portable part 31. The air flow path 31b is formed in a rectangular cross section, and the brush holding part 41 at the cleaning position is formed such that the opening 41b extends to the outside in the radial direction of the air flow path 31b. Thereby, the desk etc. can be cleaned in the wide range to the outer side of the air flow path 31b by holding the holding part 8 of the portable part 31 in which the brush holding part 41 is arranged at the cleaning position.

  At this time, the angle of the brush holding portion 41 with respect to the grip portion 8 can be varied against the urging force of the elastic member 42. For this reason, according to the to-be-cleaned surface, the opening part 41b of the brush holding | maintenance part 41 can incline to a desired angle, and it can clean favorably.

  Further, when the brush holding portion 41 is arranged at the cleaning position and the holding portion 8 is held, the front portion 41c which is the front side of the brush holding portion 41 is closed above the opening portion 41b, and the rear portion 41d which is the rear side. Is open. The inner surface of the opened rear portion 41d slides on the side wall of the air flow path 31b, and the brush holding portion 41 rotates. For this reason, the brush 40 provided around the opening 41b is arranged in a U shape in plan view.

  Since the brush holding portion 41 is urged in the direction of the cleaning position by the elastic member 42, when the portable portion 31 is detached from the extension pipe 6, the brush holding portion 41 is arranged at the cleaning position without requiring a turning operation by the user. Thereby, it can clean immediately, without touching the dust adhering to the brush 40 or the brush holding | maintenance part 41. FIG.

  Further, since the brush holding portion 41 slides against the inner wall 6b (see FIG. 7) and rotates against the urging force of the elastic member 42 when being stored in the storage portion 6a, the user can perform a rotation operation. Arranged in the storage position without need. Thereby, the portable part 31 can be quickly attached to the extension pipe 6 without touching the dust adhering to the brush 40 and the brush holding part 41, and the brush holding part 41 can be accommodated.

  At this time, the rotation shaft 41a is disposed on the outer side in the radial direction of the air flow path 31b and on the front side of the air flow path 31b when used in the cleaning position. For this reason, the brush holding portion 41 rotates between the cleaning position and the storage position with a small rotation angle of 90 ° or less without blocking the front of the air flow path 31b. Thereby, the outer cylinder 30 of the extension pipe 6 and the air flow path 31b can be communicated with each other without blocking the front of the air flow path 31b at the storage position.

  FIG. 10 shows a side view of the portable unit 31 in a state where the brush holding unit 41 is stored in the storage unit 6a. On the side surface of the extension pipe 6, a window portion 6 d is formed through which a part of the brush 40 disposed on the rear portion 41 d of the brush holding portion 41 is exposed. Thereby, the brush 40 becomes visible, and the user can be easily informed that the portable unit 31 can be removed from the extension pipe 6 and cleaning can be performed with the brush 40.

  At this time, the brush 40 is provided on the end surface of the brush holding portion 41 where the opening 40b is formed. For this reason, the user's line of sight toward the brush 40 when the grip 8 is gripped is blocked by the brush holder 41. Thereby, since the brush 40 to which dust adheres cannot be visually recognized easily, the fall of the cleanliness at the time of use can be prevented.

  11 and 12 are a side view and a top view showing the brush holding portion 51 at the tip of the extension pipe 32. FIG. 13 shows a sectional view taken along the line CC in FIG. 11, and FIGS. 14 and 15 show sectional views taken along the line AA and BB in FIG. 12, respectively.

  The brush holding part 51 has an opening 51b facing the surface to be cleaned at the tip, and the brush 50 is disposed around the opening 51b. The brush holding portion 51 is pivotally supported by a rotation shaft 51a provided on the side wall of the extension pipe 32, and is held rotatably. The brush holding portion 51 abuts against stoppers 32b and 32c provided on the extension pipe 32, and the rotation range of the brush holding portion 51 is restricted. When the extension pipe 6 is stored in the extension pipe storage part 4f, the brush holding part 51 is disposed at a storage position where it abuts against the stopper 32b as shown in FIG. The brush holding part 51 is arranged on the extension of the extension pipe 32 in the storage position.

  Further, when the brush holding portion 51 is disposed at the storage position, the front portion 51c that is forward of the end surface 32a that the elongated pipe 32 opens is blocked from the upper portion of the opening portion 51b, and the rear portion 51d that is behind is open. Has been. The inner surface of the opened rear portion 51d slides on the side wall of the extension pipe 32, and the brush holding portion 51 rotates. For this reason, the brush 50 provided around the opening 51b is arranged in a U shape in plan view.

  The brush holding portion 51 has an upper surface opening 51e parallel to the rotation shaft 51a formed on the upper surface facing the opening 51b. The upper wall 32f of the extension pipe 32 passes through the upper surface opening 51e by the rotation of the brush holder 51. The upper surface opening 51e is provided with an elastic member 52 that is integrally formed with the brush holding portion 41 made of a resin molded product. The elastic member 52 can block the upper surface opening 51e and prevent airflow leakage.

  The rotating shaft 51a, the elastic member 52, and the stoppers 32b and 32c are hinges that support the brush holding portion 51, which is a rotating body, with respect to the extension pipe 32, which is a base, so as to be rotatable between a cleaning position and a storage position. Configure the mechanism.

  The elastic member 52 has an S-shaped portion 52a that extends from the front end of the upper surface opening 51e to the rear (the extension pipe 32 side) and meanders in an S-shape. The end surface 32a of the extension pipe 32 is formed as an inclined surface, and the rear end of the S-shaped portion 52a is disposed inside the relative rotation range of the front end of the upper wall of the extension pipe 32 and contacts the end surface 32a. The elastic member 52 has a bent portion 52b that bends upward from the rear end of the S-shaped portion 52a. The bent portion 52b is narrower than the S-shaped portion 52a, and is disposed on the inner side of the extension pipe 32 than the end surface 32a at the storage position.

  When the brush holding part 51 is rotated in the direction in which the front part 51c is upward (clockwise in FIG. 11), the S-shaped part 52a slides on the end face 32a. At this time, since the meandering S-shaped portion 52a is pushed down by the inclined end surface 32a and expands in the vertical direction, the brush holding portion 51 is biased by the elastic member 52 in the direction of the storage position.

  When the brush holding portion 51 is rotated against the urging force of the elastic member, the brush holding portion 51 is disposed at a cleaning position inclined with respect to the storage position as shown in FIG. By rotating the extension pipe 6 with the front end of the brush 50 arranged on the brush holding part 51 in contact with the surface to be cleaned, the brush holding part 51 can be easily arranged at the cleaning position. Accordingly, the ceiling surface and the like can be cleaned by gripping the grip portion 8 of the portable portion 31 integral with the extension pipe 6.

  At this time, the angle of the brush holding part 51 with respect to the holding part 8 can be varied against the urging force of the elastic member 52. For this reason, the opening 51b of the brush holding part 51 can be inclined at a desired angle according to the surface to be cleaned, and cleaning can be performed satisfactorily. Further, when the brush 50 is separated from the surface to be cleaned, the brush holding portion 51 returns to the storage position by the urging force of the elastic member 52.

  As shown in FIGS. 17 and 18, the brush holder 51 whose angle can be changed at the cleaning position can be rotated until it abuts against the stopper 32 c and the opening 51 b is arranged substantially perpendicular to the elongated pipe 32. At this time, the bent portion 52b of the elastic member 52 slides on the flat portion 32d at the end of the upper wall 32f of the extension pipe 32. The sliding range between the elastic member 52 and the upper wall 32f of the extension pipe 32 can be increased by the bent portion 52b, and the rotation range of the brush holding portion 51 can be increased.

  The flat portion 32d is formed at an obtuse angle with respect to the turning radius connecting the turning shaft 51a and the upper wall front end of the extension pipe 32. For this reason, if the brush holding part 51 leaves | separates from a to-be-cleaned surface, the bending part 52b will be returned to a storage position by the component of the circumferential direction of the elastic force which presses the plane part 32d. When the frictional force between the flat surface portion 32d and the bent portion 52b is large, the brush holding portion 51 is maintained at the position of FIGS. 18 and 19, but when the angle of the extension pipe 6 is slightly changed, the brush holding portion 51 is Return to the storage position.

  Since the brush holding part 51 is urged in the direction of the storage position by the elastic member 52, when the extension pipe 6 integrated with the portable part 31 is stored, the brush holder 51 is arranged at the storage position without requiring a turning operation by the user. The Thereby, the portable part 31 integral with the extension pipe 6 can be quickly attached to the main body part 4 without touching the dust adhering to the brush 50 or the brush holding part 51.

  Further, by bringing the brush 50 into contact with the surface to be cleaned, the brush holding portion 51 is arranged at the cleaning position without requiring a rotating operation by the user. Thereby, it can clean immediately, without touching the dust adhering to the brush 50 or the brush holding | maintenance part 51. FIG.

  In the vacuum cleaner 1 configured as described above, when the electric blower 2 is driven in a state where the extension pipe 6 is attached to the main body portion 4, air is sucked together with dust from the suction port (not shown) of the suction port body 5. The air sucked from the intake port flows into the dust collecting part 3 through the air flow path 4a, and the dust is separated by the centrifugal force due to the turning. The separated dust accumulates in the dust collecting container 3a and is discarded by opening the front panel 4d. The air from which the dust is removed by the dust collecting unit 3 is exhausted from an exhaust port (not shown) through a room in which the electric blower 2 is disposed. Thereby, the floor surface is cleaned.

  At this time, the extension pipe 6 and the inner surface of the extension pipe storage portion 4f are sealed by packing (not shown), and no airflow flows between the extension pipe storage portion 4f and the air flow path 4b. Thereby, the work rate fall of the vacuum cleaner 1 is prevented.

  When the portable part 31 is detached from the main body 4 integrally with the extension pipe 6 by the operation of the hook 11, the extension pipe 32 is pulled out from the tip of the extension pipe 6. At this time, the brush holding part 51 is arranged at the storage position. When the electric blower 2 is driven, air is sucked together with dust from the opening 51 b of the brush holding part 51 at the tip of the extension pipe 32. The air sucked from the opening 51b flows through the extension pipe 32, the outer cylinder 30, the air flow path 31b, and the connection hose 7, and flows into the dust collecting section 3 through the air flow path 4b.

  Thereby, as shown in FIG. 19, it is possible to easily clean the air conditioner, ceiling surface, furniture gap, and the like disposed above the room. At this time, the brush 50 comes into contact with the surface to be cleaned and the brush holding portion 51 is arranged at the cleaning position.

  Further, when the portable part 31 is detached from the main body part 4 by the operation of the hook 12, the brush holding part 41 is arranged at the cleaning position by the elastic member 42. When the electric blower 2 is driven, air is sucked together with dust from the opening 41b of the brush holder 41. The air sucked from the opening 41b flows through the air flow path 31b and the connection hose 7, and flows into the dust collecting section 3 through the air flow path 4b. Thereby, as shown in FIG. 20, a desk etc. can be cleaned easily.

  According to the present embodiment, the elastic member that urges the brush holding portion 51 serving as a rotating body that rotates between the storage position (first rotation position) and the cleaning position (second rotation position) in the direction of the storage position. 52 is integrally formed of the same member as the brush holding portion 51. Therefore, it is possible to easily realize a hinge mechanism in which the brush holding portion 51 can be disposed at the first rotation position with respect to the extension pipe 32 serving as a base without requiring a user to grip and rotate the brush holding portion 51. can do. Thereby, the opportunity that the brush holding part 51 to which dust adheres contacts a finger | toe reduces, and the convenience of the vacuum cleaner 1 can be improved.

  Further, the elastic member 52 has an S-shaped portion 52a meandering in an S-shape from the front end of the upper surface opening 51e parallel to the rotation shaft 51a. The S-shaped portion 52a extends inside the rotation range of the front end of the upper wall 32d of the extension pipe 32, and the rear end of the S-shaped portion 52a slides on the end surface 32a of the extension pipe 32 formed of an inclined surface. For this reason, the S-shaped part 52a can press the end surface 32a, and can easily urge the brush holding part 51 to the storage position (first rotation position).

  Further, the extension pipe 32 serving as a base opens the end surface 32a, and the bent portion 52b is bent from the rear end of the S-shaped portion 52a so as to have a narrower width than the S-shaped portion 52a (first rotation position). Thus, it is arranged inside the end face 32a of the extension pipe 32. Thereby, the sliding range of the elastic member 52 and the upper wall 32f of the extension pipe 32 can be enlarged, and the rotation range of the brush holding part 51 can be enlarged.

  The extension pipe 32 serving as a base has a flat surface portion 32d that is formed at an obtuse angle with respect to the turning radius connecting the front end that slides with the S-shaped portion 52a and the turning shaft 51a and that slides with the bent portion 52b. . As a result, when the brush holding portion 51 is separated from the surface to be cleaned and the rotational force is removed, the brush holding portion 51 is moved to the storage position (first position) by the circumferential component of the elastic force with which the bent portion 52b presses the flat surface portion 32d. It can be easily returned to the rotation position.

  In this embodiment, the hinge mechanism in which the rotating body including the brush holding portion 51 is rotatable with respect to the base body including the extension pipe 32 and is biased by the elastic member 52 is described. On the other hand, a hinge mechanism may be provided similarly. For example, in a hinge mechanism that pivotally supports a door (rotating body) to be opened and closed on a support body (base body), the same effect can be obtained with the same configuration.

  According to this invention, it can utilize for the vacuum cleaner which has a rotating brush, the door opened and closed, etc.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Electric blower 3 Dust collection part 4 Main body part 4f Extension pipe storage part 5 Suction port body 6 Extension pipe 6a Storage part 6b Inner wall 6d Window part 7 Connection hose 8 Gripping part 9 Movable part 11, 12 Hook 30 Outer cylinder DESCRIPTION OF SYMBOLS 31 Portable part 31b Air flow path 32 Extension pipe 32a End surface 32b, 32c Stopper 32d Plane part 40, 50 Brush 41, 51 Brush holding part 41a, 51a Rotating shaft 41b, 51b Opening part 51e Upper surface opening part 42, 52 Elastic member 52a S-shaped part 52b Bent part

Claims (4)

A hinge mechanism for rotatably supporting a rotating body on a base by a rotary shaft, wherein the rotating body rotates between first and second rotating positions with respect to the base, and the rotating body is moved to a first position. An elastic member for biasing in the direction of one rotation position is integrally provided by the same member as the rotation body,
The rotating body has an opening parallel to the rotating shaft and has an opening through which the base passes, and the elastic member meanders in an S-shape from the front end of the opening and the front end of the base An S-shaped portion extending inwardly within the rotation range, and a rear end of the S-shaped portion slides on an end surface of the base body formed of an inclined surface to rotate the rotating body. Hinge mechanism.   The base opens at the end face, and the elastic member bends from the rear end of the S-shaped part, and is bent at the first rotation position inside the end face of the base at a narrower width than the S-shaped part. The hinge mechanism according to claim 1, further comprising a portion.   The said base | substrate has a flat part which is formed at an obtuse angle with respect to the turning radius which connects the front end and the said rotating shaft which slide with the said S-shaped part, and slides with the said bending part. The hinge mechanism according to 2.   The hinge mechanism according to any one of claims 1 to 3, wherein the elastic member is formed of a resin molded product integrally formed with the rotating body.

Images