JPH0423269Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is applied to, for example, a controller for an electric blanket, and more specifically, it is used to display the energization state of a controller, etc., the setting position of temperature control, etc. This invention relates to display devices.

[Prior art]

Conventional controllers in electric blankets
As shown in the figure, an opening 1a is formed on the upper wall surface of a hollow box-shaped case 1, and a display nameplate 2 made of a light-transmitting material is provided so as to close this opening 1a from above. Inside the case 1, a board 3 on which control circuit components are mounted is arranged substantially parallel to the upper wall surface of the case 1. On this board 3, an irradiation lamp 5 such as a neon lamp is directly attached to the tip of its lead part by soldering, and by bending the lead part, it is placed horizontally parallel to the board 3. , is fixed by a fixed holder 4 on the substrate 3. The display part of the display name plate 2 is brightly embossed by the irradiation from the irradiation lamp 5.

However, in the above-mentioned conventional display device, when setting the irradiation range for the display nameplate 2 to be wide, the opening 1a of the case 1 is formed to be large, and the irradiation lamp 5 is correspondingly large and long as the display area of the display nameplate 2 becomes larger. In this case, it is necessary to install more lamps or increase the number of irradiation lamps 5.
Further, since the above-mentioned irradiation lamp 5 is installed horizontally, there are problems such as the need for a fixed holder 4 exclusively for attaching the irradiation lamp 5.

[Purpose of invention]

The present invention has been developed in consideration of the above-mentioned conventional problems, and it is possible to set a wide irradiation range on the display nameplate with a relatively small irradiation source, and also has a special fixing holder for fixing the irradiation lamp. The object of the present invention is to provide a display device that eliminates the need for a display device and enables a reduction in the number of parts.

[Structure of the idea]

In the display device according to the present invention, a board on which control circuit components are mounted is placed in a hollow box-shaped case approximately parallel to the top wall of the case, and the top wall is covered with a light-transmissive display name plate. In a display device in which a nameplate mounting opening is formed and an irradiation lamp that irradiates light onto the light-transmissive display nameplate from inside the case is installed by directly attaching its lead portion to the substrate, In this case, a mortar-shaped wall part extending from the periphery of the nameplate mounting opening and whose opening area gradually decreases toward the board side, and an irradiation lamp installed at the lower end of this mortar-shaped wall part in an upright state on the board. A cylindrical support part is provided surrounding the lower end of the irradiation lamp to prevent the irradiation lamp from falling.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

On the upper wall surface of the hollow box-shaped case 6 that constitutes the outer shell of the controller in the electric blanket, there is a mortar-shaped wall portion 6a that is recessed inside the case 6.
are integrally formed. This mortar-shaped wall portion 6a
A large opening (nameplate mounting opening) 6b formed along the upper wall of the case and set to match the display part of the display nameplate 7, and an irradiation lamp 10 formed at the bottom of the mortar-shaped wall 6a. A small opening 6c that can be inserted into the opening 6c is formed in a concentrically opposing state. A display nameplate 7 made of a light-transmitting material and having a temperature control display section on its surface is attached to the upper wall surface of the case 6, and the mortar-shaped wall section 6a
It is provided so as to close the large opening 6b from above.

On the other hand, inside the case 6, a substrate 9 supported by a plurality of upper and lower supports 8 is provided in a non-contact state with the inner wall of the case 6 and substantially parallel to the upper wall surface of the case. On this board 9, control circuit components and the like are attached and wired, and an irradiation lamp 10 made of a neon lamp or the like is installed in an upright state. The lead part of this irradiation lamp 10 penetrates the board 9 and is directly soldered to the bottom surface of the board 9.
1, it is installed and wired together with the control circuit components. Further, a short cylindrical support portion surrounding the lower end side of the irradiation lamp 10 is formed at the small opening 6c at the lower end of the mortar-shaped wall portion 6a in the case 6. By fitting the lower end of the irradiation lamp 10, the irradiation lamp 10 is prevented from falling.

On the upper wall surface of the case 6, as shown in FIG.
A knob member 12 that can be switched between "medium", "low", and "off" positions is provided in a state that projects upward from inside the case. The lower part of the knob member 12 is engaged with a slider 13 disposed inside the case 6, and the volume adjustment member 14, which is engaged with this slider 13 and is one of the control circuit components, is controlled by the knob member 12. It is configured to be able to slide freely following the movement of the slider 13 accompanying a change to the switching setting position, thereby controlling the control circuit 16 of the controller main body 15 shown in FIG. 4. The controller circuit also includes an irradiation lamp 10 as shown in FIG.
A fixed resistor 17 is connected to adjust the intensity of the irradiation light from the irradiation lamp 10 appropriately by dropping the voltage at both ends of the irradiation lamp 10, and this fixed resistor 17 is also mounted and wired on the board 9. . still,
18 is a power supply/output cord connected to the controller.

[Effect of idea]

As described above, in the display device according to the present invention, a mortar-shaped wall portion whose opening area gradually decreases from the periphery of the nameplate mounting opening toward the board side is provided on the upper wall surface of the case, and the mortar-shaped wall portion At the bottom end of the
This structure includes a cylindrical support part that surrounds the lower end of the irradiation lamp that is mounted upright on a board inside the case to prevent the irradiation lamp from falling.

Therefore, even with a relatively small irradiation lamp,
The mortar-shaped wall functions as a reflector for the irradiated light, increasing the amount of light directed toward the display nameplate, so it is possible to set a wide irradiation range for the display nameplate, and it is surrounded by the mortar-shaped wall. Since the entire airspace is illuminated almost uniformly, uneven illumination of the display nameplate is suppressed. Furthermore, since the irradiation lamp is installed in an upright position (vertical position), a conventional fixed holder is not required, thereby reducing the number of parts. Furthermore,
The irradiation lamp in an upright state is surrounded by the peripheral wall of the cylindrical support at the lower end of the mortar-shaped wall, and the irradiation lamp is prevented from falling, so the irradiation lamp is installed in an upright state and a special fixed holder is provided. Even without,
The effect is that the irradiation lamp is installed in a stable state.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a controller display device showing an embodiment of the present invention, and FIG.
3 is a sectional view taken along the line Y--Y in FIG. 1, FIG. 4 is a circuit diagram of a controller, and FIG. 5 is a longitudinal sectional view showing a conventional display device. 6 is a case, 6a is a mortar-shaped wall, 6b is a large opening (nameplate mounting opening), 6c is a small opening, 7 is a display nameplate, 9 is a substrate, and 10 is an irradiation lamp.

Claims (1)

[Claim for Utility Model Registration] A board on which control circuit components are mounted inside a hollow box-shaped case is arranged approximately parallel to the upper wall of the case, and the upper wall is covered with a light-transparent display name plate. A nameplate mounting opening is formed, and an irradiation lamp that irradiates light from inside the case to the light-transmissive display nameplate is provided.
In a display device that is installed by directly attaching the lead portion to the substrate, a mortar-shaped wall portion extending from the periphery of the nameplate mounting opening to a conical wall portion whose opening area gradually decreases toward the substrate side is provided on the upper wall surface of the case. Further, the lower end of the mortar-shaped wall is provided with a cylindrical support part that surrounds the lower end side of the irradiation lamp that is mounted upright on the board and prevents the irradiation lamp from falling. display device.