JPS6150171B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mainspring device that enables maximum power storage operation while preventing disconnection due to overload.

Examples thereof will be described below with reference to the accompanying drawings.
The figure shows an application to a vacuum cleaner, that is, 1 is a fan motor 2 and a cord reel 3.
4 is a dust case detachably connected to the front side of the vacuum cleaner with a built-in fan motor 2 via a buckle 5, and in front of it is a waste dust port that can be opened and closed with a lid 6. 7 is formed, and a filter device 8 is removably inserted into the rear opening. The space between the waste dust port 7 of the dust case 4 and the filter device 8 is set into a coarse dust chamber 10 and a fine dust chamber 11, which are partitioned by a partition wall 9.

Both the coarse dust chamber 10 and the fine dust chamber 11 are opened to the waste dust port 7.

The lid body 6 is obtained by combining a front plate 12 and a back plate 14 having a packing 13 attached to the outer periphery that is in close contact with the mouth edge of the waste dust port 7. It is pivotally connected via. 16 is the lid body 6
17 is a suction port, 18 is a buckle plate that is movable up and down inside the lid 6, and a hook 19 protruding from the bottom of the lid 6 is located at the bottom of the dust case 4. It engages with the protrusion 20 to maintain the closed state of the lid 6.

21 is a spring that urges the buckle plate 18 upward so that the hook portion 19 engages with the protrusion 20; 22 is an operation button for the buckle plate 18, which is located in front of the handle 23 on the dust case 4. In addition, the previous buckle 5
The operating section is located on the rear side of the handle 23.

Next, the filter device 8 has a fine dust outlet 2 at the bottom.
4 and a filter case 25 that is open at the front and rear, and a disk-shaped primary filter 26 that closes the front open portion of the filter case 25.
, a cylindrical wave-shaped secondary filter 27 located downstream of the primary filter 26 and facing inside the filter case 25, and a filter case 25.
The main component is a frame 28 that covers the rear open part of the frame 28.

More specifically, the frame body 28 has a shaft supporting cylinder 29 that protrudes forward and backward at the center, a vent hole 30 on its outer periphery, and a packing 31 that comes into elastic contact with the inner peripheral surface of the dust case 4 is attached to the outermost periphery. This is what I did. The rear opening edge of the filter case 25 is connected to the frame 28 via the packing 31 described above.

Reference numeral 32 indicates a packing that is attached to the front open end of the filter case 25 to provide air tightness between the primary filter 26 and the coarse dust chamber 10.

Further, the secondary filter 27 is constructed by attaching paper in a cylindrical wave shape to a filter aggregate made of a soft material, and a filter end plate 34 made of a rigid material and having a ventilation hole 33 is provided on the rear side. .
This filter end plate 34 is integrated with the secondary filter 27 via packing 35 attached to the outer periphery, and holds the secondary filter 27 which is soft. Reference numeral 36 denotes a packing that tightens the air between the filter end plate 34 and the frame body 28, and 37 indicates a packing 2 provided close to the fine dust outlet 24 of the filter case 25.
The dust remover 38 of the next filter 27 is a small gear rotatably supported on the outer periphery of the rear surface of the frame 28 via a shaft 39. A ratchet gear 40 such as a ratchet gear is attached to the front part of the small gear, and a ratchet gear 40 is attached to the rear part of the small gear. Clutch pawls 41 are formed respectively.

A large gear 42 has a shaft 43 supported in the shaft support cylinder 29 of the frame body 28 protruding forward from the center, and has a tooth profile formed on the outer periphery to mesh with the tooth profile of the small gear 38, 44 is the vent.

The shaft 43 of the large gear 42, a shaft 45 formed at the center of the filter end plate 34 and pivotally supported within the shaft support cylinder 29, and the center boss portion 46 of the primary filter 26 are connected by a screw 47. Big gear 4
2, the primary and secondary filters 26 and 2 rotate.
7 are arranged to rotate at the same time.

48 is a mainspring device attached to the front of the large gear 42, which includes a mainspring case 49 and a case lid 5.
0 and a mainspring 51 housed in the mainspring case 49.

The mainspring case 49 has a flange portion 52
is rotatably supported by circular ribs 53 and pawls 54 integrally formed on the large gear 42.
It is designed not to deviate from 2. On the other hand, the case lid 50 has a center boss 55 that fits into the outer periphery of the shaft support cylinder 29 of the frame 28, and is in a relatively rotatable relationship with the mainspring case 49. 56 and 57 are mating protrusions and recesses formed on the coaxial support tube 29 and the case cover 50, respectively, in order to prevent the case lid 50 from rotating relative to the shaft support tube 29; 58 is a convex portion and a recess formed on the outer circumference of the mainspring case 49; One of the plurality of protrusions formed is set as an inclined surface.

Reference numeral 59 indicates a locking pawl that is pivotally provided on the back surface of the large gear 42, and is brought into contact with the outer peripheral surface of the mainspring case 49 by the urging force of an elastic arm 60 that is integrated with the locking pawl. When the large gear 42 rotates in one direction, the locking pawl 59 engages with the projection 58, and when the large gear 42 rotates in the opposite direction, it climbs over the projection 58 via the inclined surface.

In the mainspring device 51, the mainspring 51
The inner end thereof is fixed to the boss 55 of the case lid 50, and the outer end thereof is locked to the inner surface of the mainspring case 49 with a frictional force.

61 is a pawl piece 6 corresponding to the pawl wheel 40 of the small gear 38
Reference numeral 2 denotes operating levers, which are disposed on the rear and front sides with the frame body 28 in between, and are connected by a connecting shaft 63. 64 is a spring that urges the pawl piece 61 in the direction of engagement with the ratchet wheel 40; 65 is an automatic dust removal button that presses the operating lever 61; 66 is a spring for its return; 67 is the clutch pawl 41 of the small gear 38; It is a clutch pawl on the main body side that engages only when rotating in one direction, and is attached to an output shaft 68 that interlocks with the cord reel 3.

69 is a handle of the main body 1 of the vacuum cleaner, and 70 and 71 are axles provided at the dust case 4 and the lower part of the main body 1, respectively.

In the above configuration, the dust-containing air flowing in from the suction port 17 first passes through the primary filter 26 to remove coarse dust.
Next, fine dust is filtered through the secondary filter 27, and only the purified air reaches the fan motor 2.
The coarse dust is collected in the coarse dust chamber 10, and part of the fine dust adheres to the secondary filter 27, and the other part passes through the fine dust outlet 24 of the filter case 25 to the fine dust chamber 10. Fall.

Next, we will discuss the dust removal operation. Now, when the power cord is pulled out from the cord reel 3 to use the vacuum cleaner, the rotation of the cord reel 3 is transmitted to the main body side clutch pawl 67 and the clutch pawl 41 through the output shaft 68.
is transmitted to. From this, the small gear 38 and the large gear 42
is rotating.

The rotation of the large gear 42 is first caused by the primary
The dust is transferred to the secondary filters 26 and 27, and as the primary filter 26 rotates, the dust adhering to its upper surface is rubbed with the coarse dust in the coarse dust chamber 10 and removed. It is vibrated to shake off fine dust that has adhered to it. Furthermore, the mainspring 51 of the mainspring device 48 is wound by the rotation of the large gear 42. That is,
At this time, the locking pawl 59 provided on the large gear 42 engages with the protrusion 58, so that the mainspring case 49 rotates together with the large gear 42, while the case lid 50 is fitted with the concave and convex portions 57 and 56. The mainspring 5 is prevented from rotating relative to the frame 28 when
1 winding is performed.

It should be noted that the ratchet wheel 40 of the small gear 38 is not engaged with the pawl piece 61 during the dust removal operation that occurs when the power cord is pulled out.

Conversely, when winding the power cord onto the cord reel 3, the clutch pawl 6 on the main body side is connected to the clutch pawl 61.
7 is disengaged, and the pawl piece 61 engages with the ratchet wheel 40, thereby preventing the main gear 51 from rotating the large gear 42 and the small gear 38 in reverse.

In this way, the mainspring 51 is wound and stored power in response to the power cord being pulled out, but when the winding limit is reached, the mainspring 51
Only the mainspring case 49 rotates idly by overcoming the frictional force between the outer end of the mainspring case 49 and the inner surface of the mainspring case 49.

When coarse and fine dust accumulated in the dust case 4 is to be thrown away, the dust case 4 is separated from the main body 1 of the vacuum cleaner, and then the automatic dust removal button 65 is pushed. However, the claw piece 61 is activated via the operating lever 62.
The force of the mainspring 51 is applied to the protrusion 58 of the mainspring case 49 from the point where the mainspring 51 separates from the ratchet wheel 40.
It is transmitted to the large gear 42 and then to the small gear 38 via the locking pawl 59 engaged with the latching pawl 59 .

When the large gear 42 rotates, the primary
Dust removal is performed before the secondary filters 26 and 27 are discarded.

Thereafter, by carrying the dust case 4 to a suitable location, opening the lid 6, and directing the waste dust port 7 downward, both coarse and fine dust can be thrown away at once.

Further, when automatic dust removal by the mainspring 51 is insufficient, the large gear 42 can be used to manually remove dust.

When the large gear 42 is rotated in one direction, the locking pawl 59 rides over the protrusion 58 of the mainspring case 49 via its slope, and is substantially separated from the mainspring case 49. Therefore, the mainspring 51 is not rotated too much in the opposite direction after the stored power is released, and damage to the mainspring 51 does not occur.

By the way, in the mainspring device 48, the inner end of the mainspring 51 is fixed to the center boss 55 of the mainspring case 49, and the outermost peripheral part 5
1' is in elastic contact with the inner periphery of the mainspring case 49. The elastic contact force of the outermost peripheral part 51' of the mainspring 51 with the mainspring case 49 is caused by the auxiliary spring 7.
2. More specifically, the auxiliary spring 72 overlaps the inner side of the outermost peripheral part 51' of the mainspring 51, urges it in the outer circumferential direction, and brings it into elastic contact with the inner peripheral surface of the mainspring case 49. It is welded to the outer end of 51. Reference numeral 73 denotes a recessed portion formed in a part of the inner circumferential surface of the mainspring case 49.

Now, when the mainspring 51 is wound up by the rotation of the mainspring case 49, the mainspring 51 is gradually wound toward the center. At this time, the outermost peripheral portion 51' is prevented from being rolled in by the action of the auxiliary spring 72, and comes into elastic contact with the inner circumferential surface of the mainspring case 49, and is in an integral relationship with the mainspring case 49 due to frictional force. As the winding of the mainspring 51 progresses and exceeds a certain winding force, that force overcomes the frictional force between the outermost circumferential portion 51' and the mainspring case 49, and the outermost circumferential portion is moved inside the mainspring case 49. It begins to slide around the circumference. When the outer end of the mainspring 51 faces into the recess 73, the outer end plunges into the recess 73 due to its restoring force, causing a kind of twist at the contact point A between the end of the recess 73 and the outer end. Force arises. Therefore, the sliding motion of the outermost peripheral portion 51' is temporarily stopped, and the mainspring 51 is wound again. When the winding force becomes larger than the sum of the frictional force and the twisting force, the outermost peripheral portion 5
1' slides on the inner peripheral surface of the mainspring case 49 and prevents the mainspring 51 from being wound further.

As described above, the present invention includes a mainspring case, a mainspring fixing member that is rotatable with respect to the mainspring case, and a mainspring housed in the mainspring case, and the inner end of the mainspring is fixed to the mainspring fixing member. At the same time, the outermost periphery is brought into elastic contact with the inner periphery of the mainspring case by the biasing force in the outer periphery direction of an auxiliary spring provided inside the outermost periphery, and a recess is formed in a part of the inner periphery of the mainspring case. Therefore, it is possible to reliably store power while preventing the mainspring from breaking due to excessive winding. In particular, the concave part of the mainspring case prevents the outermost part of the mainspring from accidentally slipping and is effective in winding the mainspring to its maximum capacity. be.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is a sectional view of a filter device section, Fig. 3 is a perspective view thereof, and Fig. 4 is a shaft support cylinder in a frame body. 5 is a perspective view of the dust removal operating body (large gear) and mainspring device, FIG. 6 is a front view of the same, FIG. 7 is a perspective view of the automatic dust removal operation section, and FIG. 8 is a perspective view of the mainspring device. FIG. 49...Spring case, 50...Spring fixing member (case lid), 51...Spring, 51'...
...outermost periphery, 72...auxiliary spring, 73...recess.

Claims (1)

[Claims] 1 A mainspring case, a mainspring fixing member that is rotatable with respect to the mainspring case, and a mainspring stored in the mainspring case, the inner end of the mainspring is fixed to the mainspring fixing member, and the outermost part is fixed to the mainspring fixing member. is a mainspring that is brought into elastic contact with the inner circumferential surface of the mainspring case by the biasing force in the outer circumferential direction of an auxiliary spring provided inside the mainspring, and furthermore, a recess is formed in a part of the inner circumferential surface of the mainspring case. Device.