JPH0373286B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to, for example, a bearing device for a lid rotatably attached to a main body case of a vacuum cleaner.

(Prior Art) Conventional bearing devices of this type include, for example, bearing devices for lids that are rotatably attached to the main body case of a vacuum cleaner in correspondence with dust collection chambers, parts storage chambers, etc. formed in the main body case of a vacuum cleaner. adopts the structure described in Japanese Utility Model Application Publication No. 57-72852. As shown in FIGS. 10 and 11, this structure rotates one hinge metal fitting 2 attached to the lid 1 side and the other hinge metal fitting 4 attached to the main body case 3 side with a shaft 5. The shaft 5 is movably supported and mounted, and both ends of the shaft 5 are inserted into and supported by a pair of bearings 6 protruding from the main body case 3 in a bearing hole 7 formed oppositely to each other.

In the structure shown in FIGS. 10 and 11, a stopper ring 8 must be fitted to one end of the shaft 5 to prevent it from falling out of the bearing hole 7. , fitting the stopper ring 8 is troublesome, and in the structure of the conventional bearing 6 described above, when it is formed integrally with the main body case 3 from synthetic resin, the bearing hole 7 is oriented in the direction of the bearing 6.
Since the direction is perpendicular to the cutting direction of the mold for forming the bearing hole 7, the mold for forming the bearing hole 7 must be a sliding mold, which is not only difficult to manufacture but also increases the cost of the mold. .

Further, for example, a bearing device described in Japanese Utility Model Application Publication No. 52-45420 is known. This bearing device has protrusions with semicircular concave portions extending inward on both sides of the opening edge of the main body case, and elastically deformable approximately U-shaped protrusions on both rear sides of the opening edge. A structure is adopted in which a receiving part is provided protrudingly, a shaft protruding from both sides of the lid body is engaged with a recessed part of the projecting part, and this shaft is supported by the tip of the receiving part.

(Problems to be Solved by the Invention) In the lid bearing device having the structure described in Japanese Utility Model Application Publication No. 52-45420, when force is applied to the lid from the outside, the receiving portion elastically deforms and the lid deforms. The problem is that stable support cannot be achieved, such as the axis of the machine becoming detached.

The present invention has been made in view of these problems.The lid body can be easily attached to the main body case, the axis of the lid body is stably supported by the bearing of the main body case, and the lid body can be attached to the lid body from the outside. The shaft of the lid body does not come off the bearing even when force is applied to the body, making it easy to manufacture and reducing costs.Furthermore, it prevents the shaft from falling off the bearing even without attaching a stopper ring to the shaft of the lid body. The present invention provides a bearing device for a lid body that can be used.

[Structure of the invention]

(Means for Solving the Problems) A bearing device for a lid body according to the first aspect of the invention is such that the shaft of the lid body is pivotally supported by a bearing provided in a main body case made of synthetic resin, and this lid body is attached to a main body case. In a bearing device for a lid that is rotatably mounted, the bearing that pivotally supports the shaft of the lid has a vertically elongated bearing hole that is integrally protruded from the main body case and supports the shaft, and a side of the bearing hole. a bearing body having a shaft insertion part formed by cutting out at least a lower part of the middle part of the bearing body; and a shaft support that is formed to be lower than the height of the shaft by at least the length of the diameter of the shaft, is elastically deformable only in the horizontal direction, and supports the shaft supported in the bearing hole from below at its tip. be.

The lid bearing device of the second invention is a lid bearing device in which the shaft of the lid is rotatably supported by a bearing provided in the main body case made of synthetic resin, and the lid is rotatably attached to the main body case. In the device, the bearing that pivotally supports the shaft of the lid body has a vertically elongated bearing hole that is integrally provided in the main body case and supports the shaft, and that extends at least a portion below the middle portion of the side of the bearing hole. A bearing body having a shaft insertion portion formed by cutting out a shaft, and a bearing body integrally protruding from the body case in front of the bearing hole, the height of which is at least as large as the diameter of the shaft, which is greater than the height of the bearing hole. The shaft is formed to be lower in length and has an inclined surface at the tip that is inclined toward the side opposite to the shaft insertion portion, and is elastically deformable only in the horizontal direction. a shaft support supported from above; and a shaft support provided integrally protruding on the main body case on the side of the shaft insertion portion, which is a side of the shaft support, and formed to be lower than the height of the shaft insertion portion by at least the length of the diameter of the shaft. It is equipped with a stopper.

The lid bearing device of the third invention is a lid bearing device in which the shaft of the lid is pivotally supported by a bearing provided in a main body case made of synthetic resin, and the lid is rotatably attached to the main body case. In the device, the bearing that pivotally supports the shaft of the lid body has a vertically elongated bearing hole that is integrally provided in the main body case and supports the shaft, and that extends at least a portion below the middle portion of the side of the bearing hole. A bearing body having a shaft insertion portion formed by cutting out a shaft, and a bearing body integrally protruding from the body case in front of the bearing hole, the height of which is at least as large as the diameter of the shaft, which is greater than the height of the bearing hole. a shaft support formed low in length and elastically deformable only in the horizontal direction and supporting the shaft supported in the bearing hole from below at its tip, and an inverted U-shaped slit into which the shaft support is inserted; A bearing cover having formed side walls covers the shaft support.

(Function) In the lid bearing device of the first invention, an elastic shaft support is pressed horizontally from the shaft insertion portion of the bearing body that projects the shaft of the lid into the main body case, and the shaft support is elastically pressed. When inserted into the bearing hole while being deformed, the shaft of the lid body is supported within the bearing hole and supported from below by the tip of the shaft support which returns to its original state due to elastic force. Since the shaft support can be elastically deformed only in the horizontal direction and not in the vertical direction, the shaft of the lid can be stably supported without coming off from the bearing even if force is applied to the lid from the outside.

In the bearing device of the second invention, the shaft of the lid body is supported by a sloped surface at the tip of the shaft support that is inclined toward the side opposite to the shaft insertion portion, and the shaft in the bearing hole is displaced toward the shaft insertion portion and separated from the bearing. In addition to supporting the shaft support so that it does not come off, the shaft support is also held down by a stopper so that the shaft support does not elastically deform horizontally toward the shaft insertion portion.

In the lid bearing device of the third invention, the shaft support located in the slit in the side wall of the bearing cover is restricted by the outer edge of the slit and is prevented from deflecting in the horizontal direction.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4 and 9 regarding a bearing device for a lid of a vacuum cleaner.

In FIG. 9, the vacuum cleaner has a main body case 11 made of synthetic resin, and an electric blower (not shown) is built into the rear part of the main case 11. A dust collection chamber is provided in the front part of the dust collection chamber.
A dust collection bag is attached to the dust collection chamber so that it can be rotated to open and close.

Further, a suction port 14 communicating with the dust collection bag in the dust collection chamber is formed on the front side of the main body case 11, and a frame-shaped handle 15 is provided above the suction port 14.

Further, rotatable rear wheels 16 are provided on both sides of the rear portion of the main body case 11, and a rotatable front wheel (not shown) is provided at the center of the bottom front portion of the main body case 11.

A storage recess 17 is formed across the lid 12 side and the main case 11 side, and a frame-shaped frame-shaped body rotatably supported within this storage recess 17 by a shaft 13 that pivotally supports the lid 12. A handle 18 is provided.

Furthermore, an indicator 19 is provided on the lid 12 to indicate the state of negative pressure in the dust collection chamber caused by the electric blower.

Next, the bearing device 21 for the shaft 13 that pivotally supports the lid 12 will be explained based on FIGS. 1 to 4.

Both edges of the rear upper surface of the main body case 11 are raised, and a recess 22 is formed in the center, and a pair of bearing devices 21 are formed on both sides of the recess 22. A spring locking recess 23 is formed at the bottom of the intermediate recess 22 between the pair of bearings 21, and the pair of bearing devices 21 are provided in the spring locking recess 23.
One end of each of two coil springs 24 are inserted, which are wound around the shaft 13 supported between them and bias the lid 12 to the open state.

Each of the bearing devices 21 is made of synthetic resin and is integrally formed with the main body case 11, and has longitudinal bearing holes 31 that support the shaft 13 formed to face each other. A shaft insertion hole 32 that serves as a shaft insertion portion for inserting the shaft 13 into the bearing hole 31 is formed by cutting out a lower portion of the side portion, that is, the lower middle portion of the side portion that is on the opening side of the dust collection chamber. A formed bearing main body 33 is provided to protrude from this main body case 11.

Then, the bearing hole 31 and the shaft insertion hole 3 are formed in the main body case 11 which is the lower side of the bearing main body 33.
2, a punched hole 34 communicating with these bearing holes 31 and the shaft insertion hole 32 is bored.

Also, the main body case 11 in front of the bearing hole 31
A shaft support 35 that is integrally formed with the main body case 11 from synthetic resin and has elasticity is provided on the main body case 11 in a protruding manner. This shaft support 35 can be elastically deformed only in the horizontal direction, and cannot be elastically deformed in the vertical direction, which is the axial direction. The shaft support 35 is formed to have a height lower than the height of the vertically elongated bearing hole 31 by the length of the diameter of the shaft 13,
The tip end contacts the lower side of the shaft 13 supported within the shaft support 35 and is supported from below.

The shaft 1 passes through one side edge of the lid 12 and the base end of the handle 18.
3 are inserted through the shaft insertion holes 32 of the pair of bearing devices 21, respectively, as shown in FIG.
As shown in FIG. 3, the end of the shaft 13 is first
The shaft 13 is inserted and supported in the bearing hole 31 as shown in FIG. 4, and the shaft support 35 is bent.
, the shaft support 35 returns to its original state due to its elastic force, and its tip abuts the lower part of the shaft 13 in the bearing hole 31 to support the shaft 13 from below.

The shaft 13 supported within the bearing hole 31 is
The shaft insertion hole 32 is formed only downward from the middle part of the side of the bearing hole 31, and the upper side of the bearing hole 31 remains to support the shaft 13, and the shaft 13 is shifted downward from the bearing hole 31 and the shaft Even if the shaft 13 tries to come out from the insertion hole 32, it is blocked by the shaft support 35, so the shaft 13 is inserted into the bearing hole 3.
1.

By the way, although the above structure is sufficient to perform the function of the bearing 21, in order to make the appearance of the vacuum cleaner beautiful, as shown in FIGS. 7 and 9, the upper surface of the main body case 11 is A main body cover 41 is fitted into the recess 22.

This main body cover 41 covers the recess 22 and also has the storage recess 17 that stores one side edge of the lid 12 passing through the shaft 13 and the base end of the handle 18, as shown in FIG. A bearing cover 42 is integrally formed on both sides of the storage recess 17 to cover the entire bearing device 21 including the shaft support 35.

The bearing cover 42 includes a side wall 43 forming a peripheral wall of the storage recess 17, a top plate 44 that covers the upper part of the bearing 21, and the wall 45 that covers the front of the bearing 21.

Then, the side wall 43 is formed by inserting the shaft support 35 into a portion corresponding to the shaft support 35.
An inverted U-shaped slit 46 is formed into which the shaft 13, which is supported by the bearing 21, is inserted while avoiding contact with the bearing 21.

When an external force is applied to the shaft 13 and the shaft 13 is pushed downward and tries to come out from the shaft insertion hole 32, the shaft support 35 that prevents the shaft 13 from descending is pressed by the vertical pressing force. , tries to bend toward the shaft insertion hole 32 side in the horizontal direction, but since the outer edge of the slit 46 contacts and supports the shaft support 35, the shaft support 35 is prevented from being further elastically deformed in the horizontal direction. There is no risk that the shaft 13 will come off the bearing 21.

Next, another embodiment will be described based on FIGS. 5 and 6.

Note that the same parts as in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted.

The bearing device 21 of this embodiment has the shaft support 35
An inclined surface 51 is formed at the tip of the shaft support 35 on the side opposite to the shaft insertion hole 32, and a stopper 52 made of synthetic resin is integrally provided on the main body case 11 on the shaft insertion hole 32 side of the shaft support 35. In this structure, the height of this stopper 52 is formed to be lower than the height of the shaft insertion hole 32 by the length of the diameter of the shaft 13.

In the structure of this embodiment, the shaft 13 supported in the bearing hole 31 is restricted by the inclined surface 51 of the shaft support 35 and does not come out to the shaft insertion hole 32 side. is pushed toward the shaft insertion hole 32 side by the shaft 13 through the shaft 13, and becomes easily bent due to elastic deformation in the horizontal direction. However, since the stopper 52 contacts and supports the shaft support 35 that is about to deflect, the shaft support 35 does not bend too much. There is no risk of it breaking.

The bearing device 21 of each of the above embodiments is integrally formed with the main body case 11 by injection molding, but the molding die in this case can be formed by punching the top and bottom through the punching hole 34. The structure is simple and inexpensive, reducing costs, and
It also becomes easier to mold.

〔Effect of the invention〕

According to the present invention, the shaft of the lid body can be easily and reliably supported in the bearing of the main body case by simply inserting the shaft of the lid body into the bearing hole from the shaft insertion portion of the bearing body of the main body case. Even if a pressing force is applied to the lid shaft due to an external force applied to the lid, the shaft support of the bearing will not be elastically deformed in the vertical direction, so the shaft of the lid will be stably supported by the bearing and will not come off. The shaft is securely supported without any problems. In addition, since the lid does not come off without fitting another locking member such as a stopper ring to the shaft of the lid, it is easy to attach the lid to the main case, and the shaft of the lid can be locked to the bearing. Since there is no need to use separate parts, it can be done at low cost.

Further, according to the present invention, by providing an inclined surface at the tip of the shaft support that is inclined toward the opposite side of the shaft insertion portion, the shaft of the lid body in the bearing hole is regulated by this slope and comes off from the shaft insertion portion. The shaft of the lid is securely held in the bearing hole, and even if the inclined surface is pushed by the shaft of the lid and the shaft support is bent toward the shaft insertion part, the shaft support is supported by the stopper. It will never break.

In addition, since the shaft support is covered with a bearing cover, the appearance is excellent, and the shaft support is protected against horizontal external force from the shaft of the lid body when the shaft of the lid body is inserted into the bearing hole or when the lid body is rotated. However, the periphery of the inverted U-shaped slit in which the shaft support is inserted into the side wall of the bearing cover restricts horizontal elastic deformation of the shaft support, suppressing the deflection of the shaft support, so that the shaft support does not bend. It's too strong to break.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a part of the main body case and lid of a bearing device for a vacuum cleaner according to an embodiment of the present invention, FIGS. 2 to 4 are perspective views of the same bearing, and FIG. FIG. 6 is a front view of the same as above, FIG. 7 is a perspective view of the bearing covered with the same bearing cover, FIG. 8 is a vertical cross-sectional view of the same as above, and FIG. 1 is a perspective view of a vacuum cleaner, and FIGS. 10 and 11 are longitudinal sectional views showing a bearing device portion of a lid of a conventional vacuum cleaner. 11...Body case, 12...Lid body, 13...
Shaft, 21...Bearing, 31...Bearing hole, 32...Shaft insertion hole serving as shaft insertion portion, 33...Bearing body, 35
... shaft support, 42 ... bearing cover, 43 ... side wall, 46 ... slit, 51 ... inclined surface, 52 ...
...Stotsupa.

Claims (1)

[Scope of Claims] 1. A lid bearing device in which the lid is rotatably attached to the main body case by pivotally supporting the shaft of the lid on a bearing provided in a main body case made of synthetic resin, comprising: The bearing that supports the shaft has a vertically elongated bearing hole that is integrally protruded from the main body case and supports the shaft, and is formed by cutting out at least the lower part of the middle part of the side of the bearing hole. a bearing body having a diameter of at least the diameter of the shaft; and a bearing body integrally protruding from the body case in front of the bearing hole, and having a height lower than the height of the bearing hole by at least the length of the diameter of the shaft. A bearing device for a lid body, characterized in that it is provided with a shaft support that is elastically deformable only in the horizontal direction and that supports the shaft supported in the bearing hole from below at its tip. 2. In a lid bearing device in which the lid is rotatably attached to the main body case by pivotally supporting the shaft of the lid on a bearing provided in a main body case made of synthetic resin, the shaft of the lid is pivotally supported. The bearing has a vertically elongated bearing hole that is integrally provided in the main body case and supports the shaft, and has a shaft insertion part formed by cutting out at least a lower part of the side of the bearing hole than the middle part. and, the main body case is integrally provided on the main body case in front of the bearing hole, and is formed to have a height lower than the height of the bearing hole by at least the length of the diameter of the shaft, and has the shaft at the tip. a shaft support having an inclined surface inclined on the side opposite to the insertion portion and capable of elastic deformation only in the horizontal direction, and supporting the shaft supported in the bearing hole from below on the inclined surface; and a side of the shaft support. a stopper integrally protruding from the main body case on the shaft insertion part side and formed lower than the height of the shaft insertion part by at least the length of the diameter of the shaft; bearing device. 3. In a lid bearing device in which the lid is rotatably attached to the main body case by pivotally supporting the shaft of the lid on a bearing provided in a main body case made of synthetic resin, the shaft of the lid is pivotally supported. The bearing has a vertically elongated bearing hole that integrally protrudes from the main body case and supports the shaft, and also has a shaft insertion portion formed by cutting out at least a portion below the middle portion of the side of the bearing hole. and an integrally protruding member on the main body case in front of the bearing hole, the height of which is lower than the height of the bearing hole by at least the length of the diameter of the shaft, and which is elastic only in the horizontal direction. A shaft support that is deformable and supports the shaft supported in the bearing hole from below at its tip, and the shaft support is supported by a bearing cover having a side wall formed with an inverted U-shaped slit into which the shaft support is inserted. A bearing device for a lid body characterized by being covered.