JP3449662B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

This invention relates to a first fixed contact and a second fixed contact.
A pattern circuit having fixed contacts, a dome-shaped contact piece provided on a substrate, and a flexible cover which is adhered to cover the contact piece and the substrate are provided on a hand operation body of the electric vacuum cleaner,
The present invention relates to an electric vacuum cleaner that electrically connects the first fixed contact and the second fixed contact when the contact piece is elastically deformed and recessed when the contact piece is pressed from above.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 19, switches S1 to S4 are provided on an operating portion 3 of a hand-operated body 2 provided on a hose 1 of an electric vacuum cleaner.
By operating S4, the power of the electric blower (not shown) can be switched, and the brush motor (not shown) can be turned on and off.

Each of the switches S1 to S4 is shown in FIGS.
As shown in FIG. 1, a substrate 5 attached to the handy operation body case 4, a disc (contact piece) 6 made of a dome-shaped conductor arranged on the substrate, and covering and adhering the disc 6 and the substrate 5. A flexible cover 7 and a flexible nameplate 8 adhered on the cover 7 are provided.

On the surface of the substrate 5, there is provided a circular second fixed contact 5a and a first fixed contact 5 surrounding the second fixed contact 5a.
There is provided a circuit pattern which forms b, a second fixed contact 5a, and an insulating portion 5d which insulates the first fixed contact 5b from the conductive pattern portion 5c extending from the second fixed contact 5a. The insulating portion 5d is formed thicker than the first and second fixed contacts 5b and 5a, and when the disk 6 is pressed from above, the insulating portion 5d is elastically deformed and dented so that the first fixed contact 5b and the second fixed contact 5a are formed. Are designed to be electrically connected.

A vent hole 9 is provided in the cover 7 at a position of a gap J formed around the disk 6 .
The air in the dome forming disc 6 when the disc 6 is recessed through the gap J escape through the vent hole 9 to the outside, de
When the disc 6 returns to its original shape, the outside air is introduced into the dome from the ventilation hole 9 through the gap J so that the disc 6 can be smoothly recessed and returned.

Moreover, the entire lower surface of the cover 7, the disc 6 in the switch operation is not adhesive is applied so as not to cause positional deviation, the disk 6 is bonded and fixed by the cover 7.

The reason why the switch having the above structure is provided is as follows.

The area of the operating portion 3 of the hand-operated body 2 is limited, and a switch having a large operating surface is provided on the operating portion 3 having the limited area to improve the operability, and a switch structure is provided. This is because the thickness is reduced to improve the function of the hand-held operating body 2 and improve the appearance.

Further, it is possible to prevent dust or moist dust from entering between the substrate 5 and the disk 6 by the simple structure of adhering the nameplate 8, and thereby each switch S1.
This is because it is possible to prevent malfunction of S4 and short circuit accident.

[0010]

However, when the switch is assembled, the position of the disk 6 may be slightly displaced and the ventilation hole 9 may be formed at the end of the gap J. In such a case, when operating the switch, the disc 6
When I would press a finger from the top of the ventilation holes 9 with, cover
Since the entire lower surface of 7 is coated with adhesive, as shown in FIG.
As shown in 2, when the periphery of the vent hole 9 adheres to the substrate 5 and the disk 6 returns to its original state, the outside air does not flow into the dome from the vent hole 9 through the gap J. As a result, there is a problem that the disk 6 remains in a recessed state as shown in FIG. 23, and it takes a long time to completely return to the original state.

The present invention has been made in view of the above problems, and an object thereof is to provide an electric vacuum cleaner in which the disk can be restored in a short time even if the finger presses the vent hole.

[0012]

In order to achieve the above object, the present invention provides a substrate having a pattern circuit having a first fixed contact and a second fixed contact formed on its surface, the first fixed contact and the first fixed contact. 2 Dome-shaped contact piece mounted on the fixed contact, and a flexible adhesive bonded to the entire lower surface of the contact piece to fix the contact piece to the substrate and covering the substrate and the contact piece. And the cover of the vacuum cleaner on the hand control unit of the vacuum cleaner .
Provided on the switch mounting portion, a gap is formed around the contact piece between the cover and the substrate, and when the contact piece is pressed from above, the contact piece is elastically deformed and recessed. In an electric vacuum cleaner that electrically connects a first fixed contact and a second fixed contact, when the contact piece is recessed, the air in the dome formed by the contact piece is released to the outside and the contact piece has the original shape. Vent holes for introducing outside air into the dome when returning to the dome are formed in the cover from a position near the contact piece to a position overlapping with the contact piece, and the cover and the name plate are covered with the name plate. Between the switch and the bottom wall of the switch mounting part
The vent hole and the outside air are communicated with each other through a hole for passing the lead wire .

[0013]

According to the present invention, since the vent hole is formed from the position near the disc to the position overlapping the disc, even if the disc is slightly misaligned during the assembling, the vent hole is formed around the disc. Is formed on top of. For this reason, even if the vent hole is pressed together with the disc from above with a finger, the entire periphery of the vent hole of the cover does not adhere to the substrate, and when the disc returns to its original state. The outside air can flow into the dome from the ventilation hole through the gap around the disk. As a result,
The disk will be restored in a short time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric vacuum cleaner according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a hand-operated body 10 of an electric vacuum cleaner. In FIG. 1, 11 is a hose attached to the hand-held operating body 10, and this hose 11 is detachably connected to an electric vacuum cleaner body (not shown). Hand control unit 10
An unillustrated extension pipe or the like is detachably connected to the tip 10a of the. 10b is a handle.

A switch mounting portion 12 is provided on the upper surface 10c of the hand-operated body 10, and the switch mounting portion 12 is provided.
Are provided with switches S1 to S5.

As shown in FIG. 2, the switch mounting portion 12 is formed with an oval recess 13 and further the recess 1
A rectangular concave portion 14 is formed in the inside 3. Reference numeral 15 is a hole for passing a lead wire D described later.

The switches S1 to S5 are, as shown in FIGS. 3 and 4, a flexible substrate 21 attached to the bottom wall 14A of the recess 14 by an adhesive, and a dome-shaped switch disposed on the substrate 21. Discs 23 to 27, and a flexible cover 30 that covers the discs 23 to 27 and the substrate 21.
And a flexible nameplate 31 disposed on the cover 30.

As shown in FIG. 5, on the surface 21a of the substrate 21, circular second fixed contacts 32a to 32d and these second fixed contacts 32a to 32d are formed.
There is provided a pattern circuit made of copper foil in which a first fixed contact 33 surrounding the fixed contacts 32a to 32d is formed.

Further, each fixed contact 32a ...
Conductive pattern portions 33a to 3 made of conductive foil extending from 32e
3e is formed, insulators 34a and 34b are formed between the conductive pattern portions 33a to 33e and the first fixed contact 33, and further, between the second fixed contacts 32a to 32e and the first fixed contact 33. Has a ring-shaped insulator 34c. The insulators 34a and 34b are continuous with the insulator 34c. The insulators 34a to 34c are connected to the first fixed contact 33,
It is formed thicker than the second fixed contacts 32a to 32e and the conductive portions 33a to 33e.

The left end 21a of the substrate 21 (in FIG. 5)
The lands 34a to 34l made of copper foil are formed on the surface of each of the lands 34a to 34e, and the lands 34a to 34e are lines L made of copper foil.
It is connected to the conductive portions 33a to 33e by a to Le.
Resistors R1 to R6 (see FIG. 6) are connected between the lands 34a to 34e and the lands 34f to 34l.
The switch circuit shown in FIG. 6 is constituted by R6, the first fixed contact 33, the second fixed contacts 32a to 32e, the conductive portions 33a to 33e, the lines La to Le, and the disks 23 to 27 arranged at the chain line positions in FIG. 40 is formed.

Then, the disks 23 to 27 are switched by the switch S.
The first fixed contact 33 and the second fixed contacts 32a to 32e form the contacts of switches S1 to S5.

The lands 34f to 34k are connected to the lead wire 41 wired in the hose, and the land 34l connected to the first fixed contact 33 is the lead wire 42 wired in the hose.
It is connected to the. The lead wires 41 and 42 are connected to a control unit 44 provided on the main body of the electric vacuum cleaner (not shown), and the power is turned on / off by the operation of the switches S1 to S5, the power of the electric blower M1 is weak, standard, and strong. The floor brush motor M2 is controlled to be turned on and off.

As shown in FIGS. 7 to 9, the cover 30 covering the disks 23 to 27 and the substrate 21 discharges the air in the dome-shaped disks 23 to 27 and introduces the outside air into the dome. Long vent holes 36a
36e is formed. The vent holes 36a to 36e are formed from positions near the disks 23 to 27 to positions overlapping the disks 23 to 27.

Further, around each of the disks 23 to 27,
Due to the step difference between the disks 23 to 27 and the substrate 21,
As shown in FIG. 8, a gap G1 is formed between the cover 30 and the substrate 21, and the disk 2 is formed by the insulators 34a and 34b.
The lower part 2 of the disk 23 is lifted by lifting one end of the 3
A gap G2 is also formed between 3A and the substrate 21. Then, the inside of the disk 23 is ventilated through the gaps G2 and G1.
The air inside the disk 23 is discharged to a space between the nameplate 31 and the cover 30 through the vent hole 36a as shown by an arrow.

Similarly, the air in the other disks 24-27 is also discharged between the nameplate 31 and the cover 30 through the vent holes 36b-36e.

On the cover 30, the name plate 3 attached to the recess 13 of the switch mounting portion 12 by an adhesive agent.
1 is arranged on the name plate 31, as shown in FIG. 10, at the position facing the disks 23 to 27, the switch S1 is placed.
The operation parts 31a to 31e of S5 to S5 are formed. These operation portions 31a to 31e project upward in a dome shape,
The characters "OFF", "WEAK", "STANDARD", "STRONG", "FLOW BRUSH ON / OFF" are written on the upper surfaces of the operation sections 31a to 31e. Further, each of the operation parts 31a to 31e is adapted to be depressed when pushed from above.

A gap (not shown) is formed between the name plate 31 and the cover 30, and the air discharged into this gap is discharged to the outside through the lead wire hole 15.

Next, the operation of the above embodiment will be described.

Now, for example, when the operating portion 31b of the nameplate 31 is pressed with a finger from above, the dome-shaped disk 24 is elastically deformed and dented together with the operating portion 31b as shown in FIG. The nameplate 31 is omitted in FIG.

When the disc 24 is dented, the air in the disc 24 is discharged to the outside through the ventilation hole 36b of the cover 30 and the lead wire hole and the gap between the nameplate 31 and the cover 30. Due to the discharge of the air, the disk 24 is smoothly recessed. Then, due to the depression of the disk 24, the first fixed contact 33 and the second fixed contact 32b are brought into conduction. That is, the switch S2 is turned on. When the switch S2 is turned on, the electric blower M1 is driven and its power is set weak.

Even when the disc 24 is slightly displaced from the predetermined position during assembly, the ventilation hole 36b is formed in a long hole shape from a position near the disc 24 to a position overlapping the disc 24. The vent holes 36b are always formed above the gap G1 around the disk 24. For this reason, the vent holes 36b are formed together with the disk 24.
Even if it is pressed with a finger from above, the entire periphery of the vent hole 36b of the cover 30 is not adhered to the substrate 21 by the adhesive on the lower surface of the cover 30 and the vent hole 36b is not blocked. Only a part of the peripheral portion of 36b is bonded to the substrate 21 by the adhesive on the lower surface of the cover 30.

Even if a part of them is adhered, as shown in FIG. 11 (insulators 34a, 34b, 34c are omitted in FIG. 11), gaps G1 and G2 around the disk 24 (see FIG. 8). Thus, the inside of the disk 24 and the vent hole 36b are in communication with each other.

When the finger is removed from the operating portion 31b of the name plate 31, the disk 24 returns to the state shown in FIG. 8 through the state of FIG. 12 due to the elastic force, but since the vent hole 36b is not closed, the cover is covered. Gap between 30 and nameplate 31
The outside air flowing in through (not shown) passes through the vent holes 36b of the cover 30 and further through the gaps G1 and G2, and the disc 24
Be introduced inside. By introducing this outside air, the disk 24
The disk 24 is smoothly restored, and if the finger is released from the operating portion 31b of the nameplate 31, the disk 24 will be restored to the original state in a short time.

Even if the other discs 23, 25 to 27 are slightly displaced from the predetermined positions when assembled, the disc 2
Even if 3,25 to 27 and the air holes 36a, 36c to 36e are pressed with a finger from above, the air holes 36a, 36c to 3 are formed in the same manner as above.
6e is not blocked, the discs 23, 25-27 are smoothly recessed, and when the finger is released, the disc 2 is processed in the same manner as above.
Nos. 3,25 to 27 return to the original state in a short time, and the click feeling becomes good.

That is, the click feeling (operation feeling) of each of the switches S1 to S5 becomes good, and the operation feeling becomes clear. Moreover, the click feeling of the switches S1 to S5 does not vary. Therefore, the switches S1 to S5 are very convenient for an electric vacuum cleaner having a wide age range of users.

13 and 14 show the second embodiment. In the second embodiment, the disk 23 is formed along the step 35 formed by the insulator 34a and the first fixed contact 33. Vent holes 50 are formed in the cover 30 from the vicinity position to the position overlapping the disk 23. Vent holes 50 are similarly formed in positions near the other disks 24-27.

According to the second embodiment, since the ventilation hole 50 is formed along the step 35, even if the ventilation hole 50 is pressed by a finger from above, the ventilation hole 50 is communicated by the gap due to the step 35. The entire periphery of the air holes 50 is not adhered by the adhesive on the lower surface of the cover 30, and the area of the air holes 50 is not reduced, so that air can flow in and out smoothly from the air holes 50. Be done. As a result, the disk 23 is restored in a shorter time, and the click feeling (operation feeling) is further improved.

FIGS. 15 and 16 show a third embodiment and a fourth embodiment. In the one shown in FIG. 15, the vent hole 51 extends between two adjacent disks 23 to 27. Both ends of the vent hole 51 are the disk 2
The air holes 51 are formed so as to overlap with Nos. 3 to 27, and the air holes 51 are staggered.

According to the third embodiment, two vent holes 51 are formed for one disc 24-26, and the two vent holes 51 are staggered, so that the discs 24-26 are mounted. Even if the position shifts up, down, left, and right (in FIG. 15), the shift can be absorbed, and variations in the up, down, left, and right of the assembly process can be absorbed.
Moreover, since the insides of the dome-shaped disks 24 to 27 are communicated with each other through the communication holes 51, even if some of the communication holes 51 are closed by the name plate 31, the height of the communication holes 51 (the thickness of the cover) is increased. Therefore, the inside of the disks 24 to 27 is maintained in communication with each other due to the opening, and as a result, the air flows in and out from the other communication holes 51 through the other disks 23 to 27. Therefore, it is possible to prevent the click feeling from being deteriorated due to the blockage of the name plate 31.

The fourth embodiment shown in FIG. 16 is the disk 23.
The air holes 52 are provided over the lengths of up to 27, and the mounting positions of the disks 24 to 26 are also vertical (see FIG. 1) in the fourth embodiment.
6), the deviation can be absorbed, and the variation in the assembling process can be absorbed.
Further, similarly to the third embodiment, even if the name plate 31 closes a part of the communication hole 52, the click feeling is prevented from being deteriorated.

17 and 18 show a fifth embodiment. In this fifth embodiment, a ring-shaped first fixed contact 62 is provided around a circular second fixed contact 61, and a first fixed contact 62 is provided. A dome-shaped disk 63 is arranged on the first fixed contact 62 as shown by a chain line to increase the thickness of the first and second fixed contacts 62 and 61, and the insulator 34 is omitted.

[0043]

As described above, according to the present invention, the substrate having the pattern circuit having the first fixed contact and the second fixed contact formed on the surface thereof, the first fixed contact and the second fixed contact are provided.
A dome-shaped contact piece placed on the fixed contact, and a flexible adhesive bonded over the substrate and the contact piece by applying an adhesive to the entire lower surface to fix the contact piece to the substrate. The cover and the switch mounting part provided on the hand operation unit of the vacuum cleaner.
A gap is formed around the contact piece between the cover and the substrate, and when the contact piece is pushed from above, the contact piece is elastically deformed and dented so that the first fixed contact is formed. And the second
In an electric vacuum cleaner that electrically connects a fixed contact, when the contact piece is recessed, the air inside the dome formed by the contact piece is released to the outside and the outside air is released when the contact piece returns to its original shape. Vents for introducing air into the dome are formed in the cover from a position in the vicinity of the contact piece to a position overlapping with the contact piece, and the cover is covered with a nameplate, and a space is provided between the cover and the nameplate .
And the lead wire formed on the bottom wall of the switch mounting part.
Since the ventilation hole and the outside air are communicated with each other through the through hole , the ventilation hole is formed from a position near the disk to a position overlapping with the disk even if the disk is slightly misaligned during assembly. As a result, the ventilation holes are formed on the gap formed around the disk. For this reason, even if the vent hole is pressed together with the disc from above with a finger, the entire periphery of the vent hole of the cover does not adhere to the substrate, and when the disc returns to its original state. The outside air can flow into the dome from the ventilation hole through the gap around the disk. As a result, the disk is restored in a short time, and the click feeling is good.

Further, since the switch has a good click feeling and the operation feeling is clear, it is a very convenient switch for an electric vacuum cleaner having a wide age range of users.

[Brief description of drawings]

FIG. 1 is a side view showing a hand operation body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a plan view of a hand-operated body with a switch unit removed.

FIG. 3 is a cross-sectional view showing a switch structure.

FIG. 4 is an enlarged view in which a part of FIG. 3 is enlarged.

FIG. 5 is a plan view showing a circuit pattern provided on a substrate.

FIG. 6 is a circuit diagram showing a switch circuit.

FIG. 7 is a plan view showing a state in which a substrate is covered with a cover.

FIG. 8 is an enlarged sectional view in which a part of FIG. 7 is enlarged.

FIG. 9 is a plan view showing a positional relationship among a disk, each fixed contact, and a ventilation hole.

FIG. 10 is a plan view showing a nameplate.

FIG. 11 is an explanatory view showing a state where the disc is recessed.

FIG. 12 is an explanatory diagram showing a state where the disc has returned to the middle.

FIG. 13 is a plan view showing a second embodiment.

14 is a cross-sectional view of FIG.

FIG. 15 is an explanatory diagram showing a third embodiment.

FIG. 16 is an explanatory diagram showing a fourth embodiment.

FIG. 17 is a plan view showing a fifth embodiment.

FIG. 18 is a sectional view showing a fifth embodiment.

FIG. 19 is a side view showing a hand operation body of a conventional electric vacuum cleaner.

FIG. 20 is a cross-sectional view showing the structure of a switch provided on the hand operation body of the electric vacuum cleaner of FIG.

FIG. 21 is a plan view with the nameplate of FIG. 20 omitted.

22 is a cross-sectional view illustrating the operation of the switch shown in FIG.

FIG. 23 is an explanatory diagram for explaining a conventional problem.

[Explanation of symbols]

21 board 23-27 disk (joint piece) 30 covers 32a-32e 2nd fixed contact 33 1st fixed contact 36a-36e Vent hole

Continuation of the front page (56) References JP-A-3-82431 (JP, A) Jpn. Pat. Appln. Microfilm (JP, U) Microfilm (JP, U) (58) Fields of study in which the contents of the specifications and drawings attached to the application for Japanese Utility Model Application No. 61-136779 (Japanese Utility Model Application No. 63-43326) were photographed (Int.Cl. ⁷ , DB name) A47L 9/22-9/32 H01H 13/00-13/76

Claims (3)

(57) [Claims] 1. A substrate having a pattern circuit having a first fixed contact and a second fixed contact formed on its surface, and a dome-shaped contact piece mounted on the first fixed contact and the second fixed contact. ,
An adhesive is applied to the entire lower surface to fix the contact piece to the board, and a flexible cover is attached to cover the board and the contact piece. A gap is formed around the contact piece between the cover and the substrate, and when the contact piece is pushed from above, the contact piece is elastically deformed and dented so that the first fixing In an electric vacuum cleaner that electrically connects a contact and a second fixed contact, when the contact piece is recessed, the air in the dome formed by the contact piece is released to the outside and the contact piece returns to its original shape. Vents for introducing outside air into the dome when forming are formed in the cover from a position near the contact piece to a position overlapping with the contact piece, and the cover is covered with a name plate. And the hole through which the lead wire is formed in the bottom wall of the switch mounting part Vacuum cleaner, characterized in that communicates with said vent hole and the outside air through. 2. A plurality of first fixed contacts and a second fixed contact, and a plurality of contact pieces, wherein the vent hole is formed over at least two contact piece positions. Vacuum cleaner. 3. The first fixed contact surrounds the second fixed contact and extends from the second fixed contact, along with the conductive pattern and the conductive pattern.
And an insulating portion provided between said thick is formed and the conductive pattern from the first fixed contact first fixed contact,
The vacuum cleaner according to claim 1, wherein the ventilation hole is formed along a step formed by the insulating portion and the first fixed contact .