JP3384525B2 - Cord winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord winding device provided with a drum body having a pair of sliding contact points for winding and storing a cord. 2. Description of the Related Art Conventionally, as a cord winding device of this kind, for example, a configuration described in Japanese Patent Application Laid-Open No. 2-177923 is known. The cord winding device described in Japanese Patent Application Laid-Open No. Hei 2-177923 has a drum body provided with flange portions projecting from both ends of a substantially cylindrical winding drum portion through the winding portion in the outer peripheral direction. At the end of the winding body, a pair of tongue-shaped contacts electrically connected to the cord to be wound and having elasticity are arranged, and a mounting base for mounting a shaft located at the center axis of the winding body is provided. In addition to the above, a plate-shaped mounting portion having a pair of ring contacts slidably connected to the contacts is rotatably mounted on the shaft so as to face the mounting base, and this mounting portion is, for example, in a case of the main body of the vacuum cleaner. The drum body is mounted so that it can rotate freely. [0004] However, in the conventional cord winding device described in JP-A-2-177923, when the mounting portion is mounted on the drum body, the mounting base and the mounting portion face each other. If the contact is mounted in an inclined state without being attached, stress may be applied to the contact to damage the contact or cause poor contact. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a cord winding device in which a reliable electrical contact can be obtained without damaging a contact and a mounting portion can be easily mounted on a drum body. And According to a first aspect of the present invention, there is provided a cord winding device comprising: a cylindrical winding body having a shaft member on a center axis; A drum body provided with a pair of flanges for defining a winding part for winding the cord with the outer peripheral surface of the winding body part; and a drum provided substantially perpendicular to the center axis of the drum body and electrically connected to the cord. A mounting having contacts that are connected to each other, and a mounting plate having contacts that slidably contact the contacts and facing the mounting in a substantially parallel manner, the mounting being rotatably mounted on the shaft member. Part, provided on the mounting plate, protruding toward the mounting base, and the winding body part
And a flange portion which is inserted inside and covers a contact portion of the contact point facing the inner peripheral surface of the winding body portion,
A mounting plate having contacts electrically connected to the wound cord and having a contact slidably contacting a contact of the mounting base substantially perpendicular to the center axis of the drum body, Provision of a flange part that protrudes toward the mounting base, is inserted inside the winding body, and faces the inner peripheral surface of the winding body to cover the contact part of the contact. In addition, when the mounting portion is inclined with respect to the drum body when the mounting portion is mounted on the shaft member, the flange portion allows the mounting plate of the mounting portion and the mounting base of the drum body to easily tilt with a simple configuration. The attachment is prevented from being attached in the state, the attachment portion is securely attached to the drum body, and no stress is applied to the contacts, thereby preventing damage and poor contact of the contacts. An embodiment in which the cord winding device of the present invention is used in a vacuum cleaner will be described below with reference to the drawings. In FIG. 5, reference numeral 1 denotes a vacuum cleaner main body, and the vacuum cleaner main body 1 has a lower case 2a having an upper surface opened.
A main body case 2 having a front upper surface opened by an upper case 2b for closing a rear upper surface of the lower case 2a, and an opening of a front upper surface of the main case 2 can be opened and closed. And a lid 3 to be closed. Further, the main body case 2 has a swing wheel 4 that is swingable on the front lower surface, and a rear wheel 5 that is driven by a rear side surface. Further, a handle 7 is provided on the upper part of the main body case 2 so as to be slidable in the vertical direction.
An accessory storage section 9 for storing the accessory 8 is provided. On the other hand, in the vacuum cleaner main body 1, a dust collecting chamber 12 whose upper part is opened by a partition wall 11 having a lattice-shaped communication port 10 is formed in a front section in the traveling direction of the vacuum cleaner main body 1. In addition, an electric blower chamber 13 is formed behind the dust collection chamber 12. And in the dust collection chamber 12,
A dust collection bag 16 is detachably mounted by a holder 15 pivotally mounted in the dust collection chamber 12. On the front face of the partition 11, an auxiliary dust collecting filter 18 for covering the communication port 10 is detachably mounted.
Note that the dust bag 16 and the auxiliary dust filter 18 are attached and detached via the upper opening of the dust collection chamber 12. On the other hand, in the electric blower room 13, an electric blower
Twenty are arranged. The electric blower 20 includes a motor unit 21 (not shown) that rotationally drives a fan, for example, about a shaft, and a fan cover 23 that opens an air inlet 22 that covers the fan. A motor head 25 substantially at the center of the rear end face of the electric section 21 is formed to project rearward in a columnar shape. Further, an annular rubber support 24 is fitted to the front end of the electric blower 20 at the outer peripheral edge of the front end, and a rubber buffer 26 is mounted on the motor head 25 at the rear end of the electric unit 21. It is attached so as to cover the head 25. On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 29 projecting downward and having a lower end portion formed in a concave arc shape along the outer peripheral surface of the fan cover 23;
The upper rib rear portion 30 is located rearward of the upper portion 29 and projects downward substantially in parallel, and has a lower end protruding in the form of a concave arc along the outer peripheral surface of the motor head 25 of the electric portion 21. Further, the upper surface of the lower case 2a is opposed to the upper rib front portion 29 and the upper rib rear portion 30 and protrudes upward toward the upper rib rear portion 30. The upper end is formed in a concave arc shape along the outer peripheral surface of the fan cover 23. The lower rib front part 31 and the lower rib rear part 32 whose upper end part is formed in a concave arc shape along the outer peripheral surface of the motor head 25 of the electric part 21 respectively protrude. A shock absorber 26 mounted so as to cover the motor head 25 of the electric blower 20 is held between the top ends of the upper rib rear portion 30 and the lower rib rear portion 32, and the rear end of the electric blower 20 is cushioned. The upper rib rear part 30 and the lower rib rear part 32 pinch and fix it via 26 . Further, the outer peripheral surface of an annular rubber support 24 fitted to the front end of the electric blower 20 is sandwiched by the upper rib front part 29 and the lower rib front part 31, and the front end of the electric blower 20 is made of rubber. The upper rib front portion 29 and the lower rib front portion 31 are sandwiched and fixed via the body 24. A front end side of the electric blower 20 is connected to a dust collecting chamber 12 provided with a dust collecting bag 16 for collecting dust sucked together with air at an intake port 22 of the electric blower 20 by a rubber support 24. It is airtightly communicated via 10. An exhaust chamber 34 is formed in the vacuum cleaner main body 1 behind the electric blower chamber 13 so as to be partitioned, and an outer rear upper surface of the upper case 2b of the vacuum cleaner main body 1 has: An exhaust port communicating with the exhaust port of the electric blower 20 via the exhaust chamber 34
An opening 35 is formed. Furthermore, as shown in FIG. 1, the vacuum cleaner main body 1 is located on the left side in the traveling direction of the electric blower chamber 13 and protrudes from the lower case 2a and the upper case 2b. The rib defines a drum chamber. A drum body 40 around which a power cord (not shown), which is a cord for supplying electric power to the electric blower 20, is provided in the drum chamber. As shown in FIGS. 1 and 2, the drum body 40 is provided with a substantially cylindrical shaft support portion 41, and a flange is provided at an intermediate portion of the outer peripheral surface of the shaft support portion 41 at right angles in the axial direction. A substantially disk-shaped wheel portion 42 that protrudes in a shape is formed. Further, on the outer peripheral edge of the wheel portion 42, a substantially cylindrical winding body portion 43 is provided substantially coaxially with the shaft support portion 41, and is perpendicular to the axial direction both ends of the winding body portion 43 in the axial direction. Substantially disk-shaped flange portions 44a and 44b projecting in a flange shape are formed. The winding body 43 and the flanges 44a and 44b are integrally formed with a winding part 45 having a concave section in cross section, which is open outward and has an annular shape around which the power cord is wound. The body 40 is formed in a substantially bobbin shape. Further, a pair of bosses 47 protruding in a substantially cylindrical shape in the same direction as the shaft support portion 41 are provided on the wheel portion 42 in a radial direction. A substantially disk-shaped mounting base 48 made of a flame-retardant member is mounted on these bosses 47, 47 with screws 49. This mounting base 48 has bosses 47, 4 on one side.
A terminal for mounting a contact metal fitting 51 as a contact forming a resilient tongue-shaped sliding contact on the other surface side is provided with a substantially cylindrical positioning portion 50, 50 for inserting the tip of the 7 Bases 52, 52 are provided. Further, the mounting base 48 has a terminal base 52, 52 corresponding to the inside of the boss 47, 47.
And through holes 53, 53 through which screws 49, 49 are inserted. A power supply cord wound around the winding part 45 is connected to the contact fitting 51, and a pedestal part 55 fixed to the terminal base part 52 with a screw 49 and projects substantially V-shaped from the pedestal part 55. A pair of tongue pieces 56, 56 having elasticity are provided. And
The mounting base 48 is mounted on the wheel part 42 with screws 49, 49, and the contact fittings 51, 51 are fixed to the terminal base parts 52, 52. The drum body 40 has a flange 44 on one end surface side.
A first wall 58 is formed on the side surface of b and projects in a substantially cylindrical shape whose central axis is coaxial with the central axis of the shaft support 41. The first wall 58 is substantially coaxial with the second wall 59.
A substantially cylindrical holding plate 60 having a bottom is attached. By attaching the presser plate 60, an operation chamber 61 in which a coil-shaped spring (not shown) for winding the power cord pulled out from the winding portion 45 is disposed and formed therein,
A brake chamber 62 in which a brake means (not shown) for stopping the rotation of the drum body 40 is provided is defined between the wall body 58 and the second wall body 59. A shaft 65 as a shaft member is fitted and fixed to the shaft support 41. The shaft 65 has one end protruding from the end of the shaft support portion 41 and the other end protruding through the holding plate 60 and is fitted and fixed. A notch 66 is formed at one end of the shaft 65, and a pair of resilient engagement pieces 67, 67 are provided. At the tips of the engagement pieces 67, 67, engagement claw 68, 68 are provided, and a groove-shaped engagement groove 69 is formed along the circumferential direction in which the base end sides of the engagement pieces 67, 67 become smaller in diameter. Further, a portion of the shaft 65 protruding from the shaft support portion 41 is formed to have a diameter smaller than the inner diameter of the shaft support portion 41 to form a step portion 71. Also, shaft 65
On the peripheral surface at the other end of the lower case 2a in a groove shape along the circumferential direction.
Further, a mounting groove 72 is provided, which is engaged with a rib for partitioning the drum chamber provided in the upper case 2b. Further, a mounting portion 74 made of a flame-retardant member is mounted on the shaft 65. And this mounting part 74
Has a plate-shaped fixed plate portion 75 that is sandwiched between ribs that define drum chambers provided in the lower case 2a and the upper case 2b. Further, at a position deviated from the center of the fixed plate portion 75, a substantially cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the winding body 43 of the drum body 40 and which is fitted inside the winding body 43 is provided. Insertion part of
76 are formed. Further, a substantially disk-shaped mounting plate 77 is formed in the middle of the fitting portion 76. In addition, substantially at the center of the mounting plate 77, the engagement pieces 67, 6 of the shaft 65 are provided.
A fitting portion 78 is formed, which projects in a substantially cylindrical shape and is fitted to a portion having a smaller diameter than the other portion projecting from the shaft support portion 41 on the side where 7 is provided. A portion of the fitting portion 76 that projects substantially cylindrically from the mounting plate 77 to the side where the fitting portion 78 projects is a flange portion 79. On the inner peripheral edge of the end of the fitting portion 78 on the mounting plate 77 side, an engaging portion 80 is formed which protrudes in a ring shape inward and detachably engages with the engaging groove 69 of the shaft 65. Have been. Further, a pair of ring-shaped ring contacts 82, 82 having different diameters, which are contacts forming a sliding contact, are formed concentrically on the surface of the mounting plate 77 where the fitting portion 78 protrudes. Have been. The ring contacts 82 are connected to a circuit board (not shown) which is a control means for controlling the driving state of the electric blower 20 and the like. The engaging portion 80 of the mounting portion 74 is
When the fitting portion 78 is fitted to the shaft 65 by engaging with the shaft portion 65, the distal end portion of the fitting portion 78 comes into contact with the step portion 71 of the shaft 65, and the fixing plate portion
75 does not come into contact with the flange 44a of the drum body 40,
6 faces the winding body 43 of the drum body 40 without contact, the tip of the flange 79 faces the mounting base 48 with a slight gap, and the tongue piece 56 of the contact fittings 51, 51, 56 is deformed against the elasticity, and the distal end portions slidably contact the ring contacts 82, 82, respectively, to form the cord winding device main body 84. The mounting portion 74 mounted on the drum body 40
Are clamped and fixed by ribs protruding from the lower case 2a and the upper case 2b, and the ribs are engaged with the mounting grooves of the shaft 65 to clamp and fix the shaft 65, so that the drum body 40 is rotatable in the drum chamber. It is pivoted on. On the other hand, the lid 3 has a rear end portion pivotally attached to the upper case 2b, and covers the dust collection chamber 12 so as to be openable and closable from above. At approximately the center on the front side of the lid 3, a suction portion 90 is provided, and the suction portion 90 is formed such that an inner opening 91 and an outer opening 92 face each other. In addition, a cylindrical suction port 93 is formed in the middle opposite to the inside opening 91 and the outside opening 92. The suction port 93 has a front portion opening to the front of the vacuum cleaner main body 1 and a rear portion opening to the dust collection chamber 12. Further, a shutter 94 that slidably supports a suction port 93 that allows the dust collection chamber 12 to communicate with the outside of the vacuum cleaner main body 1 is opened and closed at the suction section 90. Next, the assembling operation of attaching the attaching portion 74 to the drum body 40 of the above embodiment will be described. On the drum body 40 on which the mounting base 48 on which the contact fittings 51, 51 are previously arranged is mounted, and on the mounting base 48 side, a mounting portion 74 is provided.
The fitting portion 78 of the mounting portion 74 is fitted to the side of the drum body 40 on which the engagement pieces 67, 67 are provided, with the mounting plate 77 side on which the ring contacts 82, 82 are mounted facing each other. . At the time of this fitting, the pair of engaging pieces 67, 67 of the shaft 65 is elastically deformed so as to approach each other, and the engaging portion 80 of the fitting 78 is
The engaging claw portions 68 of the engaging pieces 67
Engages with the edge of the engaging portion 80, which is the end edge of the fitting portion 78, and the end of the fitting portion 78 comes into contact with the step 71 of the shaft 65, and the fitting portion 78
Are rotatably fitted so as to be sandwiched between the engaging claw portions 68, 68 and the step portion 71, and the mounting portion 74 and the drum body 40 are assembled to be rotatable with each other. At the time of this assembling, the flange 44a of the drum body 40
When the fitting portion 78 is fitted to the shaft 65 in a state in which the fitting portion 78 and the fixing plate portion 75 of the mounting portion 74 are not parallel but inclined, as shown in FIGS. The fitting portion 78 cannot be fitted to the shaft 65 when the tip of the portion 79 is in contact with the mounting base 48 and is inclined. Further, since the fitting portion 78 is tubular, the fitting portion 78 is guided so as to be located along the axial direction of the shaft 65 even in an inclined state, and is substantially parallel. For this reason, the fixing fittings 75 are attached to the drum body 40 in an inclined state, so that the contact fittings 51, 51 are not unduly deformed, and the contact fittings 51, 51 are prevented from being damaged. Contact fittings 51, 82 with appropriate biasing force
Poor contact due to non-contact of 51 is prevented. Therefore, according to the above-described embodiment, the drum body 40 is rotatably mounted on the shaft 65 of the drum body 40 and is mounted in the drum chamber of the main body case 2.
A mounting base for the drum body 40, on which a mounting plate 77 of a mounting portion 74 for rotatably holding the ring contacts 82, and contact fittings 51, 51 for slidably contacting ring contacts 82, 82 provided on the mounting plate 77 are provided. Because the flange part 79 protruded so as to cover the contact part toward 48,
Contact fittings 51 and 5 that constitute sliding contacts due to intrusion of dust etc.
In addition to preventing contact failure between the ring contacts 82 and 82, the flange
Since the abutment 79 abuts the mounting base 48 of the drum body 40, the mounting plate 77 of the mounting part 74 and the mounting base 48 of the drum body 40 are not easily mounted in an inclined state with a simple configuration, and the drum is securely mounted. The mounting portion 74 can be attached to the body 40, so that no stress is applied to the sliding contact and damage to the sliding contact and poor contact can be prevented. The shaft 65 of the drum body 40 is attached to the mounting portion 74.
Since the substantially cylindrical fitting portion 78 that is rotatably mounted on the mounting portion 74 is provided, even if the mounting plate 77 of the mounting portion 74 and the flange portion 44a of the drum body 40 are fitted in an inclined state, the mounting portion 74 is substantially parallel. As a result, the flange 79 prevents the mounting in an inclined state more reliably. Further, the mounting plate 77 of the mounting portion 74 is formed of a flame-retardant member for arranging the ring contacts 82, 82 through which the commercial AC power is conducted.
Is also made of a flame-retardant member, so that the contact
Since only the mounting base 48 for attaching 51 and 51 is formed of a flame retardant member separate from the drum body 40, the contact portion of the sliding contact is surrounded by the flange portion 79 of the flame retardant member and the drum body 40
Does not need to be formed of an expensive and heavy flame-retardant member, so that the weight and cost can be reduced. In the above embodiment, the cord winding device body 84 for winding the power cord of the vacuum cleaner has been described. However, the same effect can be obtained by winding any other cord having a contact. can get. As the mounting portion 74, the mounting plate 77, the flange portion 79, and the fitting portion 78 have been described as being formed integrally with the fitting insertion portion 76 of the fixed plate portion 75 by a flame-retardant member. , The flange portion 79 and the fitting portion 78 are integrally formed of a flame-retardant member, the fixing plate portion 75 and the fitting insertion portion 76 are formed of other inexpensive members, and these are adhered with an adhesive. They may be connected integrally. According to this configuration, only the portion facing the sliding contact is made of an expensive and heavy flame-retardant member, so that the weight of the mounting portion 74 and the cost can be reduced. Although the flange portion 79 is formed so as to project substantially cylindrically from the periphery of the mounting plate 77, the drum body 40
The mounting base 48 is formed so as to protrude toward the mounting plate 77 of the mounting part 74, or the protruding part is protruded with the front end facing each other. Any shape that opposes through the gap can be used. Next, another embodiment of the cord winding device of the present invention will be described with reference to FIG. The embodiment shown in FIG. 6 corresponds to FIGS.
A mounting portion 74 is attached to the mounting base 48 of the drum body 40 of the embodiment shown in FIG.
The large flange 101 which is the flange portion 79 toward the mounting plate 77 of
Is provided with a small flange 102 which is substantially coaxially overlapped like a double tube structure and protrudes in a substantially cylindrical shape to form a flange portion of a double tube structure. According to the configuration shown in FIG. 6, the intrusion of dust can be reliably prevented, and at least one of the large flange 101 and the small flange 102 abuts on the mounting base 48 and the mounting plate 77, thereby securely mounting. The mounting plate 77 of the portion 74 and the mounting base 48 of the drum body 40 can be prevented from being mounted in an inclined state. Further, the large flange 101 and the small flange 1
02 is formed integrally with the mounting plate 77 and the mounting base 48 made of a flame-retardant member, similarly to the embodiment shown in FIGS. It is not necessary to form it by reducing the weight and cost.
Even if smoke is generated by the discharge of the sliding contact, the large flange 101 and the small flange 102 that constitute the double-structured flange
In this way, it is possible to prevent the influence of the spread of fire on other parts. In the embodiment shown in FIG. 6, the large flange 101 is provided on the mounting plate 77 and the small flange 102 is provided on the mounting base 48.
01 may be provided and the small flange 102 may be provided on the mounting plate 77. According to the first aspect of the present invention, the cord winding device is provided substantially perpendicular to the center axis of the drum body, is substantially parallel to the mounting base having the contact, and is slidable on the contact of the mounting base. The mounting plate of the mounting portion, which has a contact that comes into contact with the shaft member and is rotatably mounted on the shaft member of the drum body, projects toward the mounting base, and
A flange is inserted inside and covers the contact part of the contact facing the inner peripheral surface of the winding body, so that contact failure of the contact due to intrusion of dust etc. can be prevented, and the drum is attached when the mounting part is attached. When inclined with respect to the body, the flange can prevent the mounting plate of the mounting part and the mounting base of the drum body from being easily mounted in an inclined state with a simple configuration, and the mounting part is securely attached to the drum body. Can be attached, and no stress is applied to the contacts, so that damage to the contacts and poor contact can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment in which a cord winding device of the present invention is used in a vacuum cleaner. FIG. 2 is a plan view of the same. FIG. 3 is an explanatory diagram illustrating a situation where the mounting portion is mounted on a drum body in a state where the mounting portion is inclined. FIG. 4 is an enlarged view showing the vicinity of the above flange portion. FIG. 5 is a cross-sectional view showing a vacuum cleaner main body provided with the cord winding device main body; FIG. 6 is a sectional view showing another embodiment of the cord winding device of the present invention. [Description of References] 40 Drum body 43 Winding body portions 44a, 44b Flange portion 45 Winding portion 48 Mounting base 51 Contact metal fittings 65 as contacts Contact shaft 74 as shaft member Mounting portion 77 Mounting plate 79 Flange portion 82 Contact ring contact point

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 75/42 A47L 9/26 B65H 54/12

Claims (1)

(57) [Claim 1] A cylindrical winding body having a shaft member on a central axis and an outer peripheral surface of the winding body protruding radially from the winding body. A drum body provided with a pair of flanges for defining a winding portion for winding the cord, and a contact provided substantially perpendicular to the center axis of the drum body and electrically connected to the cord. A mounting portion, a mounting portion having a contact slidably contacting the contact and having a mounting plate substantially parallel to the mounting base and rotatably mounted on the shaft member, provided on the mounting plate. protrudes toward the mount, said
And a flange part fitted inside the winding body part and facing the inner peripheral surface of the winding body part to cover a contact portion of the contact.