JPH04195310A - Knob device of switch - Google Patents

Abstract

PURPOSE:To protect a user against unexpected danger by providing a spring for energization between a knob protection frame and a reception plate fitted to a shaft support part, and fitting the protection frame slidably. CONSTITUTION:A push-and-turn type control part 22 is fixed to a metallic fitting plate 21 with a nut 23. The protection frame 30 provided with a lock part 28 locked to the step part 27 of a knob 26 is fitted to the reception plate 24 across a compression spring 31 and then the knob 26 is fitted in a shaft 22-a. The compression spring 31 provided between the reception plate 24 and knob protection frame 30 enables the protection frame 30 to freely slide in its slide direction by the intervention of the knob 26. The surface exposed part of the knob 26 is in level with the surface of the protection frame 30 or recessed when not loaded. A scale for a standard of thermal power control is printed on a display plate 29.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a switch knob device used in a switch section of an electrical appliance or the like.

2. Description of the Related Art An example in which a conventional switch ≠ knob device is used in a built-in stove will be explained. Conventionally, this type of built-in stove and its switch have been constructed as shown in FIGS. 8 to 10.

That is, as shown in the figure, the control section (hereinafter referred to as push-and-turn type control section) has a shaft 1-b that is moved back and forth in the axial direction by a spring 1-a, and when pushed in the direction of the arrow, the shaft 1-b is moved back and forth in the axial direction. The locking rod 1-c installed perpendicularly to the locking portion 1-b
-d is released, and by further rotation, a built-in contact (not shown) is turned on and electricity can be supplied. This push-and-turn large control unit 1 is integrally equipped with a mounting plate 2,
Both end flange portions 2-a of the mounting plate 2 are fixed to the sink 3 from the inside of the front opening 4 with screws 5.

A display plate 6 formed by pressing a metal plate and covering the front opening 4 is fixed to a convex portion 2-b formed in a part of the mounting plate 2 from the front side with screws 7. At this time, there is a slight gap 8 between the surface of the convex part 2-b and the mounting part of the display board 6, and when the screws are tightened, the screw holes of the display board 6 are distorted and the display board 6 is It is designed to come in close contact with the sink 3.

The knob 9 is fitted into the shaft 1-b of the push-and-turn large control unit 1, and is attached so as to protrude from the front surface of the display board 6. When in use, the knob 9 is pressed and turned to open the sink 3. Heater 1 installed in the top opening
The energization is to start at 0.

Problems to be Solved by the Invention However, in the configuration of such a conventional switch knob device, since the knob 9 protrudes from the display board 6, the user's body may unconsciously come into contact with the knob 9 and press it. When a rotational force is applied, the heater 10 is energized, and if a combustible material is placed on top of the heater 10, there is a risk of a fire.

This is an example of a built-in stove, but the same hazards can occur when used with other electrical appliances (e.g., those with rotating blades).

The present invention is intended to solve such problems, and the first object of the present invention is to provide a switch knob device that does not energize the load section even if the user's body or the like touches the knob unconsciously.
The purpose is to

The second purpose is to improve safety so that the user does not forget to turn off the power by visually letting the user know that the power is on.

The third purpose is to improve assembly and serviceability by incorporating components on the knob side.

Means for Solving the Problems In order to achieve the above object, the present invention has a first means for solving the problems, in which a locking rod attached perpendicularly to the shaft is locked by pushing the shaft in the sliding direction with a spring. a push-and-turn large control part that is released from the part and can turn on the contact and energize the load part by further rotation; a knob having a step part for locking that is fitted into the shaft; and a roadside part of the knob. A knob protection frame that is covered and provided with a locking part that locks on the stepped part of the knob, and a spring that biases between the knob protection frame and a receiving plate attached to the pivot support of the shaft. , the knob protection frame is slidably attached to the knob.

The second problem-solving means is to provide a tongue piece on the receiving plate and a protruding piece on the protective frame, so that the knob is in a convex state with respect to the surface of the knob protective frame in the rotation range under load. The projecting piece is configured to engage with the tongue piece.

A third means for solving the problem is that the receiving plate is gripped with a spring and resiliently installed within the protective frame, and the receiving plate and the grip protecting frame are integrally and slidably engaged.

Operation The present invention has the above-described configuration, and in the first problem solving means, even if the user's body unconsciously contacts the knob and pressure is applied, the knob protection frame that covers the road side part of the knob is fixed. It acts as a cushioning material by simply sliding in the sliding direction, and the shaft of the large push-and-turn control section is not pushed backwards (inwardly). Therefore, the locking rod attached perpendicularly to the shaft is not released from the locking portion, and the load portion is not energized. In addition, when in use, the load section can be energized by pushing the knob protection frame while grasping the knob, and then rotating the knob.

In the second problem solving method, an engaging part is provided on the receiving plate and the knob protection frame, and when the knob is pushed and turned, the knob is held in a convex state with respect to the surface of the knob protection frame within the rotation range under load. This allows the user to visually know that the power is being turned on, and serves as a kind of display to prevent forgetting to turn off the power.

In the third problem-solving means, the receiving plate is elastically mounted on the knob protection frame with a spring, and the receiving plate and the knob protection frame are integrally and slidably engaged, thereby reducing the number of parts when assembling the switch. It becomes less.

EXAMPLE Hereinafter, an example in which the switch knob device of the present invention is used in a built-in stove will be described with reference to the drawings.

A first embodiment thereof is shown in FIGS. 1, 2, 3 and 4. Note that the appearance when assembled into a sink is the same as that shown in FIG. 10 of the conventional example except for the knob portion, so a description thereof will be omitted.

In the figure, reference numeral 21 denotes a metal mounting plate attached to the front opening of the sink, and the push-and-turn type control section 22 is fixed with a nut 23. Furthermore, the push-and-turn type control section 22
On the shaft support 22-b of the shaft 22-a, a receiving plate 24 is provided with a positioning rib 2 in a positioning hole 21-a provided in the mounting plate 21.
After inserting 4-a, it is fixed with a nut 25. The knob 26 is fitted into the shaft 22-a, but first, the knob 26 is inserted into the shaft 22-a.
A knob protection frame 30 is installed on the receiving plate 2 and is provided with a locking portion 28 that covers the road side portion of the knob 6 and locks the stepped portion 27 of the knob 26.
4 via the compression spring 31, and then the knob 26
into the shaft 22-a. Receiver plate 24 and knob protection frame 30
The compression spring 31 provided therebetween allows the knob protection frame 30 to slide freely in the sliding direction (axial direction) with the knob 26 interposed therebetween. The exposed surface portion of the knob 26 is flush with the surface of the knob protection frame 30 or has a concave shape when no load is applied. The external appearance of the exposed surface portion is normally as shown in FIG. 2, but it can also be as shown in FIG. 3. 2
Reference numeral 9 denotes a display plate, which is provided on the mounting plate 21, and has a scale printed thereon as shown in FIG. 4 to serve as a guide for adjusting the firepower.

In the above configuration, when the user turns on electricity to the heater installed on the top surface of the sink, the user presses the knob protection frame 30 from the state shown in FIG.
By grasping and pushing 6 and applying rotational force, the contacts in the push-and-turn type control section 22 are turned on, and the heater is energized. If the rotation continues further, after rotating 360 degrees, the shaft 22-a returns to its original position due to the restoring force of the compression spring 31.

Next, a second embodiment will be described with reference to FIGS. 5 and 6.

In the figure, the receiving plate 24A is provided with an annular tongue piece 32 in which a guide groove 35 is formed on the outer periphery of the receiving plate 24.
2 has a guide hole 34 in a part of the knob protection frame 30A, and an engagement protrusion 33 provided at one end of the knob protection frame 30A
It is guided by the guide hole 34 and engaged with the guide groove 35 at the time of pressing and rotation. With this configuration, when the knob 26 is pushed and rotated, the knob 26 is held in a convex state with respect to the surface of the knob protection frame 30A within the rotation range under load, so that the user can know that the power is being applied. can be visually understood.

Next, a third embodiment will be described with reference to FIG. 1st. The difference from the second embodiment is that a receiving plate 24B and a compression spring 31 are integrated into a knob protection frame 30B.

That is, a flange surface 36 provided on the outer periphery of the receiving plate 24B is arranged inside the knob protection frame 30B, and a cover 37 fixed to the knob protection frame 30B prevents the compression spring 3 from coming off.
1 is built in between this flange surface 36 and the knob protection frame 30B. On the other hand, the other end of the receiving plate 24B is provided with a cylindrical portion 38 that slides on the shaft 22-a. With this configuration, the operation is similar to that of the first embodiment, but since the components of the compression spring 31 and the receiving plate 24B are built into the knob protection frame 30B side, ease of assembly and serviceability are improved. .

It goes without saying that the scale used as a guide for adjusting the firepower may be printed on the outer peripheral surface of the knob protection frame.

Effects of the Invention As is clear from the above embodiments, according to the present invention, there is provided a knob having a step portion for locking that is fitted into the shaft of the push-turn type control unit, and a road side portion of this knob is covered. and a knob protection frame provided with a locking portion that locks on one end of the knob, and a spring biased between the knob protection frame and a receiving plate attached to the pivot support of the shaft, and the knob protection frame By attaching it to the knob so that it can slide freely, even when the user's body unconsciously comes into contact with the knob and pressure is applied,
The knob protection frame only slides in the sliding direction, but the shaft of the push-and-turn control section is not pushed backwards (inwardly), and the locking rod attached perpendicular to the shaft is not released from the locking section. No electricity is applied to the load section, which protects the user from unexpected dangers (such as fire in the case of built-in stoves). In addition, when in use, the load section can be energized by pushing the knob protection frame, pushing the knob while grasping it, and then rotating the knob.

In addition, an engaging part is provided between the tongue piece of the receiving plate and the protruding piece of the knob protection frame, so that when the knob is pushed and turned, the knob is held in a convex state against the surface of the knob protection frame within the rotation range under load. This makes it possible to visually inform the user that the power is on, and it can be used as a kind of display to prevent forgetting to turn off the power.

Furthermore, since the components of the spring and the receiving plate are built into the knob protection frame side, it is possible to provide a switch knob device with excellent effects such as improved assembly and serviceability.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing the switch knob device of the first embodiment of the present invention used in a built-in stove, and Fig. 2 +
a) is a perspective view of the main part of the same knob device when the knob protection frame is not pressed; FIG. 2 is a perspective view of the main part of the same knob device when the knob protection frame is pressed; FIG. 4 is a front view of the knob device, FIG. 5 is a sectional view of a second embodiment of the knob device of the same switch, and FIG. 63 is the essential portion of the same switch. FIG. 7 is a cross-sectional view of the third embodiment of the knob device of the same switch, and FIG.
The figure is a partial cross-sectional view showing a state in which a conventional switch knob device is incorporated into a built-in stove; It is an external perspective view. 22... Push-turn type control unit, 22-a old...
Axis, 22-b...Axis support, 24.24A, 24
B...Socket plate, 26...Knob, 27.
...Step part, 28...Locking part, 30.3
0A, 30B...Knob protection frame, 31...
... Compression spring (spring), 32 ... tongue piece, 33.
...Protrusion. Name of agent: Patent attorney Haruaki Ogata and 2 others 9t---
j instep version, 11 匍P section 2C---tsu 2 No. 2'l-& hair scale 2g- (Kosei 3D--one 1 company 1 Azusa jl- 9el+x'b nip> M6 figure 24A Figure 8 Figure 9 Figure 10

Claims (3)

[Claims] (1) By pushing the shaft in the sliding direction with a spring, the locking rod attached perpendicularly to the shaft is released from the locking part, and by further rotation, the contact turns ON and the load part is energized. a control portion; a knob having a locking step portion fitted into the shaft; and a knob protection frame that covers a roadside portion of the knob and is provided with a locking portion that locks to the step portion of the knob. and a spring for urging is provided between the knob protection frame and a receiving plate attached to the shaft support of the shaft, and the knob protection frame is slidably attached to the knob. (2) A tongue piece is provided on the receiving plate and a protrusion piece is provided on the protection frame, and the protrusion piece is arranged so that the knob is in a convex state with respect to the surface of the knob protection frame in the rotation range of the shaft under load. 2. The switch knob device according to claim 1, wherein said tongue piece engages with said tongue piece. (3) The switch knob device according to claim 1, wherein the receiving plate is resiliently installed within the pinching protection frame with a spring, and the receiving plate and the knob protection frame are slidably engaged integrally.