JP2504842Y2 - Fire alarm receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a fire alarm receiver equipped with various operation switches necessary for fire monitoring.

[Prior Art] Conventionally, as a fire alarm receiver of this type, for example,
The one in the figure is known (Japanese Patent Publication No. 63-43588).

In FIG. 8, 1 is a main body of the housing, 2 is a printed circuit board,
Reference numeral 3 is a display operation panel, and 4 is a door serving as an upper lid.

A transformer, a battery, etc. are mounted on the housing body 1, and a printed circuit board 2 is further housed therein. Printed circuit board 2
An electric component that constitutes a receiver circuit such as a resistor and a buzzer is mounted on the terminal, and a terminal 6 for pulling in and connecting a signal line connecting a terminal device such as a sensor is provided at a position where the door 4 can be opened and wiring can be performed. Further, a plurality of elevating switches 5 are provided on the printed circuit board 2. A display / operation panel 3 is mounted on the printed circuit board 2, and a district display unit 9 is detachably provided on the display / control panel 3. The district display unit 9 is equipped with a transparent cover engraved with a line number or the like on a display frame. Alternatively, the paper on which the line number or the like is written is sandwiched between the transparent covers to be mounted on the display frame. Further, the display operation panel 3 is formed with an insertion hole 7 through which the switch knob of the elevating switch 5 of the printed circuit board 2 is taken out.

A door 4 as an upper lid is openably and closably provided on the housing body 1 in which the printed circuit board 2 and the display operation panel 3 are housed in this way, and a front side of the door 4 has a through hole corresponding to the display operation panel 3. 8 is formed.

Here, the reason why the display operation panel 3 is separated from the door 4 is that when the display operation panel 3 is formed integrally with the door 4, the switches, LEDs and the like of the printed circuit board 2 are aligned with the holes on the door side. This is because high alignment accuracy is required during manufacturing and assembling, and actual assembling and manufacturing becomes difficult even if it is possible in terms of design. For this reason, the door 4 and the display operation panel 3 are generally separated as shown in FIG.

On the other hand, in the case of a receiver that has an integrated display and operation panel on the door, mount a printed circuit board on which the circuit necessary for display operation is mounted on the back of the door, and connect external wiring to the case body. A printed circuit board having terminals is accommodated, and a connector is connected between the two divided printed circuit boards.

[Problems to be solved by the invention] However, in such a conventional fire alarm receiver, a display frame is provided on the display operation panel side as a district display unit provided on the display operation panel separated from the door or integrated with the door. It has a structure in which a transparent cover is detachably attached to this display frame, and conventionally, engaging pieces are erected on both sides of a transparent cover having a box lid shape to be detachable from the frame side. , The display frame needs to have a depth that can accommodate the thickness of the transparent cover box lid, and the display operation panel becomes thicker and larger,
Further, the structure of the transparent cover and the display frame is complicated, which causes a problem of cost increase.

The present invention has been made in view of the above conventional problems, and is a fire alarm reception having a district display unit structure that is structurally simple while minimizing the thickness of the district display unit to minimize the size. The purpose is to provide a machine.

[Means for Solving the Problem] First, the present invention provides a case main body accommodating a power transformer, a battery, etc., and an external signal line connecting an electric circuit section equipped with a resistor, a buzzer, etc. and a sensor etc. A fire alarm receiver having a structure in which a printed circuit board having terminals to be connected and an upper lid formed of a resin mold is provided, and the printed circuit board housed in the housing body side is covered with the upper lid. To do.

In the present invention for such a fire alarm receiver,
The display frame is molded so as to have a concave shape on the surface of the upper lid, and at the same time, the upper and lower sides of the display frame are simultaneously formed with engagement receiving portions, and the right side and / or the left side are simultaneously formed with cutout portions, and the display frame is further formed. Has a plate-shaped transparent cover that is detachable from the outside, and the transparent cover has projections that engage with the engagement receiving portions of the display frame on the upper side and the lower side, and at the same time, removes from the cutout portion of the display frame. The right and left sides are formed with tapered edges that are inclined on both sides to receive a tool insertion.

[Operation] According to the fire alarm receiver of the present invention having such a configuration, the display frame formed on the upper lid may be formed on the upper lid by forming a concave shape with a plate-like transparent cover having a small thickness. The thickness of the display frame can be minimized, which can greatly contribute to downsizing of the receiver as a whole.

In addition, the transparent cover can be attached to and removed from the front and back of the display frame, and when engraving on the transparent cover to indicate the area number such as the circuit number, it is not necessary to distinguish between the front and back of the cover, and workability is improved. Good.

[Embodiment] FIG. 6 is an external view showing an embodiment of a fire alarm receiver according to the present invention, and FIG. 7 is an exploded view thereof.

First, as shown in FIG. 7, the fire alarm receiver of the present invention is composed of three units: a case body 12, a printed circuit board 14, and an upper lid 16.

A power supply transformer 18 is provided in the housing body 12, and a battery (not shown) as a standby power supply is provided in the battery storage section 20. Further, the housing body 12 is formed with a wiring lead-in hole 22 for pulling in a signal line connected to a terminal device such as a sensor from the back surface.

The printed circuit board 14 is provided with electric circuit components such as a buzzer 24 and a switch 26, and further is provided with a connection terminal 28 for connecting a signal line drawn from the wiring drawing hole 22 of the housing body 12.

Further, the upper lid 16 is provided with a display portion 30, and in this embodiment, the display portion 30 is provided with five district display portions 32. In addition, a switch operating portion 34 for pressing the five switches 26 provided on the printed circuit board 14 is formed in the step-down portion on the right side of the upper lid 16 so as to be freely displaced. A pressing protrusion for pressing 26 is integrally formed. Further, a door 36 is provided so as to be openable and closable with respect to the stepped portion forming the switch operating portion 34.

The display portion 30 of the top lid 16 will be more apparent from FIG.
That is, the display section 30 is formed with five district display sections 32, and each of the district display sections 32 is provided with a fire display window 38 and a disconnection display window 40. An LED is provided on the printed circuit board 14 side shown in the figure.
Further, a transparent cover 42 is attached to the district display unit 32, and a line number or the like is engraved on the transparent cover 42 to display the district.

In addition to the district display unit 32, the display unit 30 is provided with various displays necessary for operating the receiver at the same time.

FIG. 1 is an explanatory view showing one of the district display parts 32 in the fire alarm receiver of the present invention shown in FIGS.

In FIG. 1, a fire display window 38 and a disconnection display window 40 are provided in the district display section 32, and a display frame 44 is provided on the right side thereof.
Are integrally formed when the upper lid 16 is molded. A transparent cover 42 shown by a broken line is attached to the display frame 44 as shown by a transparent cover 42 'for the display frame 44.

FIG. 2 is a transparent cover of the present invention shown in the embodiment of FIG.
42A and 42B are a front view and a plan view showing a state where 42 is taken out.

In FIG. 2, the transparent cover 42 is a rectangular plate member, and its thickness t is about 2 to 3 mm. Protrusions 46 are formed at the centers of the upper and lower sides of the transparent cover 42, respectively. The right and left sides of the transparent cover 42 are shown in FIG. 2 (b).
As is apparent from the plan view of FIG. 3, tapered edges 48 inclined on both sides are formed.

FIG. 3 shows a YY cross section of the district display section 32 of FIG. 1, and molding is performed so that the opening 50 of the display frame 44 is pushed by the thickness t of the transparent cover 42 to form the bottom 52. The engagement receiving portion 54 is formed by forming the upper side and the lower side of the opening 50 into a tapered shape that opens toward the back side as shown in the drawing.
Is formed. The embodiment shown in FIG. 3 shows a case where the transparent cover 42 and the upper lid 16 have the same plate thickness t.

FIG. 4 shows an X-X cross section of the district display section 32 of FIG. 1, which is on the right side of the display frame 44 formed in the concave shape by the thickness t of the transparent cover 42 and on the bottom 52 of the display frame 44. The notch 56 extending therethrough is formed by molding. The notch portion 56 may be formed on the left side of the display frame 44, or may be formed on both the right side and the left side.

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

First, as shown in FIG. 1, the transparent cover 42 attached to the district display section 32 is engraved with the district display such as a line number. In this area display by engraving, a line number or the like is engraved on the surface that is the back side in the state where the transparent cover 42 is attached to the area display unit 32, and then the engraving groove is soaked with paint.

As shown in FIG. 1, the transparent cover 42 having the line display is attached to the district display portion 32 as shown in FIG.
As is apparent from FIG. 3, the protrusion 46 provided on the lower side of the 42 is attached to the engagement receiving portion 54 on the lower side of the display frame 44 as shown in FIG.
As shown in 2 ', insert the transparent cover 42 at an angle, and then push in the upper side of the transparent cover 42' as shown by the arrow,
The upper projection 46 fits into the upper engagement receiving portion 54 of the display frame 44, and the upper and lower projections 46 of the transparent cover 42 with respect to the engagement receiving portion 54.
Can be held in the mounted state by the engagement of.

On the other hand, when the transparent cover 42 attached to the district display unit 32 is removed, for example, by pushing the tip of a flat-blade screwdriver 58 into the notch 56 formed on the right side of the display frame 44 as shown in FIG. As shown in FIG. 4, the tip of the flat-blade screwdriver 58 enters the inside of the tapered edge 48 formed on the right side of the transparent cover 42, and the flat-blade screwdriver 58 is used to remove the transparent cover 42 to easily remove it from the display frame 44. You can That is, the transparent cover 42 has a display frame 44 formed by the upper and lower protrusions 46.
Since it is only engaged with the upper and lower engagement receiving portions 54 on the side, it can be easily removed by inserting the flat-blade screwdriver 58 and scooping it.

Next, as is apparent from FIG. 2, the transparent cover 42 used in the present invention has a target structure both in the vertical direction in which the protrusion 46 is provided and in the horizontal direction in which the tapered edge 48 is provided. , The district display 32 as shown in FIG.
Regarding the mounting of the display frame 44, there is no restriction that the transparent cover 42 is the front side and the back side, and the transparent cover 42 can be mounted in exactly the same manner on either side.

For this reason, if the front and back sides of the transparent cover 42 are determined as in the conventional case, it is necessary to perform the engraving of the line display on the back side of the transparent cover 42. In this case, the line display such as the line number can be provided by engraving without paying attention to the back surface and the front surface, and the workability is extremely good.

[Effects of the Invention] As described above, according to the present invention, since the display frame formed on the upper lid side may be a concave shape with a plate-like transparent cover having a small thickness, the display frame formed on the upper lid can be The thickness of the upper lid can be reduced by minimizing the thickness, which can greatly contribute to downsizing of the entire receiver.

The transparent cover can be attached to and removed from the front and back of the display frame, and when engraving on the transparent cover it is not necessary to distinguish between the front and back of the transparent cover, which makes workability extremely easy. high.

[Brief description of drawings]

1 is an explanatory view of an embodiment of a line display portion formed on the upper lid of the present invention; FIG. 2 is a front and side view of a transparent cover used in the present invention; FIG. 3 is a sectional view taken along line YY of FIG. FIG. 4 is a sectional view taken along the line XX in FIG. 1; FIG. 5 is an explanatory view of removing the transparent cover of the present invention; FIG. 6 is an external view of the receiver of the present invention; and FIG. 7 is a receiver of the present invention. FIG. 8 is an explanatory view of a conventional example. 10: Fire alarm receiver 12: Case body 14: Printed circuit board 16: Top cover 18: Power transformer 20: Battery storage 22: Wiring lead-in hole 24: Buzzer 26: Switch 28: Wiring connection terminal 30: Display section 32: District Display 34: Switch operation part 36: Door 38: Fire display window 40: Broken display window 42: Transparent cover 44: Display frame 46: Protrusion 48: Taper edge 50: Opening 52: Bottom 54: Engagement receiving part 56: Notch 58: slotted screwdriver

Claims (1)

(57) [Scope of utility model registration request] 1. A printed circuit board having a housing body accommodating a power transformer, a battery, etc., an electric circuit section having a resistor, a buzzer, etc., and a terminal for connecting a signal line from the outside, which is connected to a sensor etc. A fire alarm receiver having a top cover formed by resin molding and having the top cover attached to cover the printed circuit board housed in the casing body, wherein the top cover surface has a concave shape. The display frame is molded into and the engagement receiving portions are provided on the upper and lower sides of the display frame.
Further, notches are simultaneously molded on the right side and / or the left side, and further, the display frame has a plate-shaped transparent cover that is detachable from the outside, and the transparent cover engages with the engagement receiving portion of the display frame. The fire alarm receiver is characterized in that the projections are formed on the upper side and the lower side, and tapered edges which are inclined on both sides for receiving the insertion of the jig from the notch are formed on the right side and the left side.