JPH0327303Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application]
Concerning a switch device that is turned on and off.

[Conventional technology]

Conventional switch devices that are turned on and off by moving a switch operating body such as a knob or handle are equipped with a fixed contact piece attached to an insulating base surface, and are made of a leaf spring that approaches and separates from the fixed contact piece from above. Attach a movable contact piece, and when the switch operating body moves, this movable contact piece is pushed with its pressing part to elastically deform it and contact the fixed contact piece, and by returning the switch operating body, the movable contact piece can be moved from the fixed contact piece. It has a structure that turns the contact pieces apart using their own elastic force to turn them on and off.

[Problem that the invention attempts to solve]

However, in this conventional switch device, the movable contact piece always maintains a state separated from the fixed contact piece by its own elastic force, so the movable contact piece is repeatedly operated by the switch operating body. It is not possible to prevent wear and tear from occurring over time. However, due to this fatigue, the switch operation body is turned OFF.
There was a possibility that the movable contact piece would continue to contact the fixed contact piece even if it was returned to its position.

[Means for solving problems]

The switch device of the present invention has a fixed contact piece fixed to the switch mounting part and a fixed contact piece attached to the above switch mounting part in order to be able to turn ON and OFF reliably even if the movable contact piece becomes sagging. an elastically deformable movable contact piece having a contact portion that approaches and separates from the fixed contact piece from above and constantly separates from the fixed contact piece by its own elastic force; A movable switch operating body and a movable switch operating body are provided.
When the movable contact piece is moved to the ON position, the movable contact piece is pressed so that its contact part comes into pressure contact with the contact part of the fixed contact piece, and this pressure contact is caused by the switch operation body.
a pressing part that releases when moved to the OFF position;
Provided on the switch operating body above, and the operating body is turned ON.
The insulating part is removed from between the contact parts when the switch is moved to the OFF position, and is inserted between the contact parts when the switch operating body is moved to the OFF position.

[Effect]

According to this switch device, the switch operating body is
When ON is activated, the insulating part is moved from the position where the fixed contact piece and the movable contact piece come into contact, and the movable contact piece is pressed by the pressing part of the switch operating body and is elastically deformed to contact the fixed contact piece from above. contact and close the switch circuit. Since the switch circuit is closed by forcibly pressing the movable contact piece with the pressing portion, the switch circuit can be closed even if the movable contact piece becomes flat. Furthermore, when the switch operating body is turned OFF, the movable contact piece returns with its elastic force and separates from the fixed contact piece, and the insulating part provided on the switch operating body enters the circuit and the switch circuit is opened. Therefore, the contact between the fixed contact piece and the movable contact piece is forcibly released. Therefore, even if the movable contact piece becomes sagging, the contact between the fixed contact piece and the movable contact piece is forcibly released, so even if the switch operating body is moved to the OFF position, the switch circuit will not work. This can prevent it from being turned on.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In the figure, reference numeral 1 denotes a vacuum cleaner, and a suction brush 3 and the like are connected to the vacuum cleaner 1 through an extension pipe 32 and the like, which are connected to a dust suction hose 2 connected to a suction port. The dust suction hose 2 is provided with a connecting cylinder 4 for hand operation at its tip, and a switch device 5 is provided on this. This switch device 5 includes a switch main body 6 as a switch mounting portion formed on the upper surface of a connecting cylinder 4, a switch operating body 7 that reciprocates while being guided by this main body 6, and a switch operating body 7 that is guided by this main body 6 to reciprocate. A lid body 8 and a fixed contact piece 11 are attached to cover and cover the opening of the switch main body 6.
and a movable contact piece 14.

Further, vertical walls 9, 9 are provided approximately at the center of the interior of the switch main body 6, and a guide groove 10 is provided between these walls.
A fixed contact piece 11 is attached to the outside of the vertical wall 9. This fixed contact piece 1
1 is approximately L-shaped, one end side forms a contact part 12, and the other end side extends to the dust suction hose 2 side and is soldered to a lead wire 13 provided on the dust suction hose 2. has been done. Furthermore, the switch main body 6 has a movable contact piece 1 made of a leaf spring that can be elastically deformed.
4 is installed. One end of the movable contact piece 14 forms a contact part 15 that approaches and separates from the contact part 12 of the fixed contact piece 11 from above, and is always kept away from the contact part 12. Along with this,
A pressure receiving part 16 is formed between the other end of the movable contact piece 14 on the attachment part side and the contact part 15 by bending the contact part 15 into an inverted V shape or the like. The other end of the fixed contact piece 11 extends toward the dust suction hose 2 and is soldered to a lead wire 17 provided on the dust suction hose 2. 18 is a screw seat to which the lid body 8 is screwed.

Next, approximately at the center of the lower surface of the switch operating body 7, there is a
Guide protrusion 1 that fits into the guide groove 10 of the switch main body 6 and is movable along the guide groove 10
9, and a pressing portion 20 that presses the pressure receiving portion 16 of the movable contact piece 14 when the switch operating body 7 is turned on is provided in a protruding manner alongside the guide projection 19. Further, an insulating portion 21 is formed at one end of the switch operation body 7. This insulation part 21
In this case, the pressure receiving part 16 of the movable contact piece 14 is pressed by the pressing part 20, and the contact part 15 is pressed against the contact part 12 of the fixed contact piece 11.
In the state where the contact parts 12 and 15 are pressed together, both contact parts 12 and 15
move away from the position where it touches the switch operating body 7.
When the OFF operation releases the pressure on the pressure receiving part 16 of the movable contact piece 14 by the pressing part 20 and the movable contact piece 12 returns by its own elastic force, both of the contact parts 1
2 and 15. Further, the insulating portion 21 is provided so as to slide on the surface of the contact portion 12 of the fixed contact piece 11.
Note that 22 is a knob protruding from the upper surface of the switch operating body 7, and 23 is a spring portion for moderating the movement of the switch operating body 7.

Furthermore, the lid body 8 has a window hole 24 through which the knob 22 of the switch operation body 7 is projected and through which the knob 22 can be moved. 25 is a hooking protrusion that hooks into a hooking portion (not shown) of the connecting cylinder 4;
Reference numeral 6 denotes a screw hole for attaching the lid 8 to the screw seat 18 of the switch body 6 with a screw (not shown).

In addition, FIG. 5 is an electric circuit diagram of the vacuum cleaner, and the portions surrounding the fixed contact piece 11 and the movable contact piece 14 by the dashed line are the hand switch parts 27 and 28 formed by the connecting cylinder 4 including the dust suction hose 2. A power plug, 29 a cord reel, 30 a relay, 30a a relay switch, and 31 a blower motor.

In this configuration, when the switch operating body 7 is turned
When pressed toward the ON display position (ON operation) at step 2, the operating body 7 moves with its guide protrusion 19 being guided by the guide groove 10 of the switch body 6. Along with this movement, the pressure receiving part 16 of the movable contact piece 14 is pressed by the pressing part 20 of the operating body 7, so that the contact piece 14 is elastically deformed and the contact part 15 of the movable contact piece 14 is pressed against the contact part of the fixed contact piece 11. 12 and the switch circuit is closed. In this case, the insulating part 21 is moved together with the switch operating body 7 and escapes from between the contact parts 12 and 15, so that it does not interfere with closing the switch circuit. As described above, since the switch circuit is closed by forcibly pressing the pressure receiving part 16 of the movable contact piece 14 with the pressing part 20, even if the movable contact piece 14 becomes flat and its elastic force decreases, the contact part 15 can be reliably pressed against the fixed contact part 12, so the switch circuit can be
Highly reliable to turn on. Further, when the switch operation body 7 is turned OFF using the knob 22, the pressing portion 20 that was pressing the pressure receiving portion 16 of the movable contact piece 14 releases its pressure, so that the movable contact piece 14 returns by its own elastic force. Therefore, as the contact part 15 separates from the contact part 12, the insulating part 21 formed on the switch operation body 7 is separated from the contact part 12 of the fixed contact piece 11 and the movable contact part 1.
4, and the switch circuit is thus opened. Therefore, even if the movable contact piece 14 becomes sagging, the contact between the fixed contact piece 11 and the movable contact piece 14 is forcibly released by the movement of the insulating part 21.
It is possible to prevent the switch circuit from being in the ON state even though the switch operating body 7 has been moved to the OFF position. Further, as the switch operating body 7 is turned ON and OFF, the insulating part 21 slides on the surface of the contact part 12 of the fixed contact piece 11 and is inserted between the contact part 12 and the contact part 15 of the movable contact piece 14. Since the contact portions 12 and 15 are moved in and out, dust attached to the surfaces of both the contact portions 12 and 15 can be removed. Therefore, it is possible to prevent contact failure due to dust adhering to both contact portions 12 and 15 surfaces.

In the above embodiment, the switch device 5 is provided at the connection tube 4 of the vacuum cleaner 1, but the switch device 5 is not limited to this.

[Effect of idea]

According to the present invention, when the switch operating body is turned OFF, the insulating part of the switch operating body is forcibly inserted between the contact parts of the fixed contact piece and the movable contact piece, so that the movable contact piece becomes sagging. Even if this occurs, the switch circuit can be reliably opened. In addition, when the switch operating body is turned ON, the pressing part pushes the movable contact piece and forcibly presses both contact parts, making it possible to reliably close the switch circuit even if the movable contact piece becomes sagging. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a perspective view of a vacuum cleaner, Figs. 3 and 4 are sectional views showing different states, and Fig. 5 is a perspective view of the vacuum cleaner.
The figure is an electrical circuit diagram of a vacuum cleaner. 6...Switch body part (switch mounting part),
7...Switch operating body, 11...Fixed contact piece, 1
2, 15... Contact portion, 14... Movable contact piece, 20...
...pressing part, 21...insulating part.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixed contact piece fixed to the switch mounting part, which is attached to the switch mounting part and moves toward and away from the fixed contact piece from above, and constantly separates from the fixed contact piece by its own elastic force. an elastically deformable movable contact piece having a contact portion; a movable switch operating body for moving the movable contact piece toward and away from the fixed contact piece;
When the movable contact piece is moved to the ON position, the movable contact piece is pressed so that its contact part comes into pressure contact with the contact part of the fixed contact piece, and this pressure contact is caused by the switch operation body.
A pressing part that releases when the switch is moved to the OFF position, and a pressing part that is provided on the above-mentioned switch operating body so that the same operating body
A switch device comprising an insulating part that is removed from between the two contact parts when the switch operating body is moved to the ON position, and inserted and positioned between the two contact parts when the switch operating body is moved to the OFF position.