JP2010134673A - Alarm unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an alarm unit in which operability of a switch is improved. <P>SOLUTION: The alarm unit includes a status (fire) detection part 5 which detects a status (fire); a circuit board 4 in which the status (fire) detection part 5 and a switch 6 are mounted; an operation body 10 for pressing the switch 6; and a casing 1 which has a main part 2 and a cover part 3 and accommodates the circuit board 4. The operation body 10 includes a switch operation part 11, in which a plurality of operation faces 12 are arranged in series and a shaft part 13; the operation face 12 of the switch operation part 11 is protruded from the aperture 3c formed in the casing 1; the shaft part 13 is held in turnable at a holding part, and the operation object 10 is made turnable along the direction of the operation face 12, arranging the operation faces in series. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an alarm device, and more particularly to an alarm device with improved switch operability.

  Some fire alarms having a fire detection unit are provided with a switch for stopping an alarm sound generated when a fire is detected and for confirming the operation of the fire alarm. Some of them are provided with an operating body for operating this switch. As a conventional fire alarm provided with such a switch and operation body, for example, “the base block 2 is accommodated and installed in the outer shell case 1, and the detection unit 3 is provided on the base block 2. In a detector in which a push button portion 4 for operating a switch is provided on the front side of the outer shell case 1, an elastic piece 5 is extended integrally from a base block 2 formed of a synthetic resin molded body. A push button portion 4 is provided on the piece 5, and the push button portion 4 protrudes from a switch opening 6 formed in the outer shell case 1 so as to be able to advance and retreat. "(For example, refer to Patent Document 1). ing.

JP 2004-145757 A (Summary, FIG. 1)

  However, the conventional fire alarm (for example, see Patent Document 1) has a problem that the push button part can be operated only from the direction substantially orthogonal to the push button part (operation body), and the operability of the switch is poor. It was.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an alarm device with improved operability of a switch.

  The alarm device according to the present invention includes a state detection unit that detects a state, a circuit board on which the state detection unit and the switch are mounted, an operating body that presses the switch, a main body unit, and a cover unit, A housing that accommodates the circuit board, wherein the operating body includes a switch operating portion and a shaft portion in which a plurality of operating surfaces are continuously provided, and the operating surface of the switch operating portion is the housing The shaft portion is rotatably held by a holding portion, and the operating body is rotatable along the connecting direction of the operation surface.

  Further, the operating body has a flat plate portion formed on the opposite side of the switch operation portion on which the operation surface is formed, the shaft portion is formed on the flat plate portion, and the switch operation portion is formed on the flat plate portion. The first operation surface portion and the second operation surface portion are divided by a virtual extension surface obtained by extending the portion in the direction of the operation surface.

  Further, at least one of the main body part and the cover part is formed with a concave part that becomes the holding part, and the shaft part is held in the concave part when the cover part is locked to the main body part. Is.

  In addition, a gap longer than a gap formed between the switch operation portion and the switch is formed between the holding portion and the shaft portion.

  Further, the operating body is provided with a string attaching portion for attaching a pull string.

  Further, when the operation body is not operated, the operation body does not press the switch due to its own weight.

  In the present invention, the operation body has a switch operation portion and a shaft portion in which a plurality of operation surfaces are connected, and the operation surface of the switch operation portion protrudes from an opening formed in the housing, and the shaft Since the operating body can be rotated along the connecting direction of the operating surface by holding the part rotatably on the holding part, the operating body is operated from a plurality of different directions and the switch is pressed. be able to. Therefore, the operability of the switch is improved.

  Further, the operating body has a flat plate portion formed on the side opposite to the side on which the operating surface of the switch operating portion is formed, the shaft portion is formed on the flat plate portion, and the switch operating portion has the flat plate portion in the direction of the operating surface. The extended virtual extension surface is divided into a first operation surface portion and a second operation surface portion. For this reason, for example, when the alarm device is attached to the ceiling surface, if the operation body is provided so that the first operation surface portion protrudes from the lower surface portion of the alarm device, the second operation surface portion protrudes from the side surface portion of the alarm device. The Rukoto. Therefore, the switch can be operated not only from the lower side of the alarm device but also from the side of the alarm device.

  In addition, a recess serving as a holding portion is formed in at least one of the main body portion and the cover portion, and the shaft portion is held in the concave portion when the cover portion is locked to the main body portion. For this reason, formation of a main-body part and a cover part becomes easy, and the cost of an alarm device can be reduced. Further, the shaft portion can be firmly held.

  Further, a gap longer than the gap formed between the switch operation part and the switch is formed between the holding part and the shaft part. For this reason, even when the operating body is pressed in a direction in which it cannot rotate, the switch can be pressed.

  Further, since the operating body is provided with a string attaching portion for attaching a pulling string, the switch can be pressed even if the operating body is operated by pulling the pulling string.

  Further, when the operating body is not operated, the operating body does not press the switch due to its own weight. For this reason, the biasing means for returning the operating body to the state where the switch is not pressed is not necessary, and the structure of the alarm device can be simplified.

Embodiment.
In the present embodiment, a case where the present invention is applied to a fire alarm in which a state detection unit detects a fire will be described as an example.
Fire alarms include various fire alarms such as fire alarms that detect smoke with light emitting and receiving elements, fire alarms that detect heat with heat sensitive elements, and fire alarms that detect flame with pyroelectric elements. Exists. In the following embodiments, a case will be described in which the present invention is applied to a fire alarm device that detects smoke with a light emitting element and a light receiving element.

  1 is an external perspective view of a fire alarm device according to an embodiment of the present invention, FIG. 2 is a bottom view of the fire alarm device, FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 2, and FIG. It is -B cross-sectional schematic diagram. FIG. 5 is an external perspective view of the operating body according to the embodiment of the present invention. These FIG. 1 to FIG. 5 show the scales partially different. Hereinafter, the fire alarm device according to the present embodiment will be described with reference to FIGS. In addition, FIG. 1 has shown the state which installed the fire alarm on the ceiling surface. In the following description, the description will be made according to the vertical and horizontal directions of FIG.

The fire alarm 100 contains a fire detection unit 5 that detects a fire, a circuit board 4 on which the fire detection unit 5 and a switch 6 are mounted, an operating body 10 that operates (presses) the switch 6, and a circuit board 4 and the like. It is comprised from the housing | casing 1 etc. which do. The fire alarm 100 uses, for example, a lithium battery as a drive source.
The housing 1 includes a main body 2 and a cover 3. The main body 2 has a bottomed cylindrical shape with an open bottom. The cover part 3 has a bottomed cylindrical shape with an open top. The bottom surface portion of the cover portion 3 has a shape inclined toward the center portion. In addition, a smoke inlet 3d for allowing smoke to flow into a fire detection unit 5 described later is formed at a substantially central portion of the bottom surface of the cover unit 3.

  The cover part 3 is locked to the main body part 2. In a state where the cover portion 3 is locked to the main body portion 2, the upper surface portion of the rib 3 a formed on the inner side of the side surface portion of the cover portion 3 and the lower surface portion of the main body portion 2 face each other. A concave portion 3 b is formed on the upper surface portion of the rib 3 a, and a shaft portion 13 of the operating body 10 described later is rotatably held by the concave portion 3 b and the lower surface portion 2 a of the main body portion 2. Here, the concave portion 3b and the lower surface portion 2a of the main body portion 2 correspond to a holding portion. By forming the holding portion in this manner, resin molding of the main body portion 2 and the cover portion 3 is facilitated, and the cost related to the mold and parts of the fire alarm device 100 can be reduced. Further, the shaft portion 13 of the operating body 10 can be firmly held.

  The concave portion 3b may be provided on the lower surface portion 2a of the main body portion 2, or may be provided on both the upper surface portion of the rib 3a and the lower surface portion of the main body portion 2. Moreover, although the recessed part 3b was formed in the rib 3a which is a reinforcement member, you may form separately the convex part for forming the recessed part 3b. Further, the shape, position, and the like of the holding portion are not limited to the configuration according to the present embodiment, and various configurations can be employed as long as the shaft portion 13 of the operating body 10 can be rotatably held.

  The housing 1 accommodates a circuit board 4 on which a fire detection unit 5, a switch 6 and the like are mounted. The fire detection unit 5 detects smoke generated at the time of a fire, and a light emitting element (not shown) and a light receiving element (not shown) are provided inside. A fire is detected by an increase in the amount of scattered light received when smoke flows into the fire detector 5. The fire detection unit 5 is accommodated in the housing 1 such that the bottom side thereof faces the smoke inlet 3d of the cover unit 3.

  The switch 6 can stop the alarm sound emitted from the alarm device (not shown) through the acoustic hole 3e of the cover part 3 when a fire is detected by pressing the pressing part 6a. Further, by pressing the pressing portion 6a, it can be confirmed by inspection whether the fire alarm operates normally (whether the alarm device operates normally).

In order to press the pressing portion 6 a of the switch 6 (to operate the switch 6), an operating body 10 is accommodated in the housing 1.
As shown in FIG. 5, the operation body 10 includes a switch operation unit 11, a shaft unit 13, a flat plate unit 14, and the like. A plurality of operation surfaces 12 are continuously provided along the longitudinal direction of the switch operation unit 11 at a lower part (front side in FIG. 5) of the switch operation unit 11. These operation surfaces 12 are formed such that the perpendiculars are substantially radial along the longitudinal direction. These operation surfaces 12 (lower portions of the switch operation unit 11) project from an opening 3 c formed in the cover unit 3.

A substantially flat plate portion 14 is provided upright on, for example, the right side of the upper portion (back side in FIG. 5) of the switch operation portion 11. The flat plate portion 14 is provided at a position where a virtual extension surface 14a obtained by extending the flat plate portion 14 in the direction of the switch operation portion 11 divides the switch operation portion 11 into a first operation surface portion 12a and a second operation surface portion 12b. ing. As a result, the operation surface 12 (lower part of the switch operation unit 11) protrudes not only from the lower surface of the fire alarm 100 (cover unit 3) but also from the side surface of the fire alarm 100 (cover unit 3). Can do.
The flat plate portion 14 is not necessarily provided at the above position. For example, the flat plate portion 14 may be provided at the upper right end of the switch operation unit 11. At this time, by providing the flat plate portion 14 (and the shaft portion 13) on the outside of the housing, the operation surface 12 (lower portion of the switch operation portion 11) protrudes from the side surface portion of the fire alarm 100 (cover portion 3). Can be installed.

  Further, a contact portion 16 that contacts when the switch operation portion 11 presses the pressing portion 6 a of the switch 6 is formed on the upper side (the back side in FIG. 5) of the switch operation portion 11, for example. In addition, when pressing the pressing part 6a of the switch 6 with the switch operating part 11, in order to prevent the electrical components mounted on the circuit board 4 and the switch operating part 11 from interfering with each other, an upper part of the switch operating part 11 is provided. Is formed with a recess 11a (shown in FIG. 6).

  A pair of shaft portions 13 project from the side surface portion of the flat plate portion 14. These shaft portions 13 are rotatably held by a holding portion constituted by the concave portion 3 b of the cover portion 3 and the lower surface portion 2 a of the main body portion 2. Thereby, the operating body 10 is rotatable along the direction in which the operation surface 12 of the switch operation unit 11 is connected (longitudinal direction of the switch operation unit 11). By holding the shaft portion 13 in the holding portion, the stroke of the switch operation portion 11 (the gap formed between the contact portion 16 of the switch operation portion 11 and the pressing portion 6a of the switch 6) can be increased. A malfunction of the switch 6 can be prevented. Further, a string attaching portion 15 for attaching the drawstring 20 is provided, for example, at an upper portion of the flat plate portion 14. The string attaching portion 15 has a substantially U-shaped tip so that the pull string 5 can be easily attached and detached.

  Note that “along the continuous direction of the operation surface 12” does not mean that the operation surface 12 is substantially perpendicular to the continuous portion (ridge line portion) of each operation surface 12. For example, the continuous portion (ridge line portion) of each operation surface 12 may be inclined with respect to the longitudinal direction of the switch operation portion 11. For example, the operation surface 12 may be formed in a curve along the longitudinal direction of the switch operation unit 11. That is, each operation surface 12 should just be formed along the rotation direction of the operation body 10. Further, the shaft portion 13 is not necessarily provided on the flat plate portion 14 and may be provided on the switch operation portion 11, for example.

  In addition, a gap L2 is formed between the holding portion constituted by the concave portion 3b of the cover portion 3 and the lower surface portion 2a of the main body portion 2 and the shaft portion 13, as shown in FIG. In addition, the rectangle shown with the dashed-dotted line in FIG. 6 shows the shape of the holding part comprised by the recessed part 3b of the cover part 3, and the lower surface part 2a of the main-body part 2. As shown in FIG. The gap L2 is longer than the gap L1 formed between the contact part 16 of the switch operation part 11 and the pressing part 6a of the switch 6.

(Operation)
Subsequently, the operation of the operating tool 10 according to the present embodiment will be described.
FIG. 6 is a schematic cross-sectional view showing the operating state of the operating body according to the embodiment of the present invention. Here, (a) shows a state where the operating body 10 is not pressing the pressing portion 6a of the switch 6 (non-operating state). (B) And (c) shows the state (operation state) where the operating body 10 is pressing the pressing portion 6a of the switch 6. Moreover, the thick solid line arrow shown in FIG. 6 shows the pressing direction which presses the switch operation part 11. FIG. A thick broken line arrow indicates the pulling direction of the drawstring 20. These pressing directions and pulling directions are merely examples.

As illustrated in FIG. 6A, the operating body 10 can press the switch operating portion 11 (operation surface 12) from a plurality of directions and press the pressing portion 6 a of the switch 6.
For example, when the switch operation unit 11 (operation surface 12) is pressed in a direction in which the operation body 10 can rotate, the shaft unit 13 rotates in the holding unit (or the shaft unit 13 as shown in FIG. 6B). Is rotated while sliding in the holding portion), and the operating body 10 is rotated. And the contact part 16 of the switch operation part 11 presses the press part 6a of the switch 6. FIG.
For example, when the pull string 20 is pulled, the string attachment portion 15 is pulled in the right direction. As a result, as shown in FIG. 6B, the shaft portion 13 rotates in the holding portion (or the shaft portion 13 rotates while sliding in the holding portion), and the operating body 10 rotates. And the contact part 16 of the switch operation part 11 presses the press part 6a of the switch 6. FIG.

  For example, as shown in FIG. 6C, for example, when the switch body 11 (operation surface 12) is pressed from the direction of the virtual extension surface 14a of the flat plate portion 14 toward the shaft portion 13, the operation body 10 is It may not rotate. However, in this embodiment, since the gap L2 (> L1) is formed between the holding portion and the shaft portion 13, the operating body 10 moves upward when the shaft portion 13 slides in the holding portion. it can. Therefore, as shown in FIG. 6C, even when the switch operating unit 11 (operation surface 12) is pressed in a direction in which the operating body 10 does not rotate, the switch 6 is pressed by the contact unit 16 of the switch operating unit 11. The part 6a can be pressed.

  The switch operation part 11 is formed so as to be heavier than the flat plate part 14 on the upper side of the shaft part 13. For this reason, when the operation of the switch 6 with the operating body 10 (pressing of the pressing portion 6a) is stopped, the operating body 10 returns to a state where the pressing portion 6a of the switch 6 is not pressed by its own weight. At this time, since the weight of the drawstring 20 itself is a very light and negligible range, it is not necessary to provide a separate biasing means in order to return the operating body 10 to a state where the pressing portion 6a of the switch 6 is not pressed. For this reason, the structure of the fire alarm 100 can be simplified. The same action can be obtained even when the drawstring 20 is attached to the string attachment portion 15. Moreover, you may provide the axial part 13 from the string attachment part 15 so that the same effect | action may be acquired even if the pull string 20 becomes heavy. Moreover, in order to return the operating body 10 to the state which does not press the press part 6a of the switch 6, you may provide a biasing means separately.

  In the fire alarm 100 configured as described above, the lower part of the switch operation unit 11 in which a plurality of operation surfaces 12 are continuously provided projects from the opening 3c, and the operation body 10 (switch operation unit 11) is operated on the operation surface. Since it is provided so as to be rotatable along the 12 connecting directions, it is possible to operate the operating body 10 from a plurality of different directions (press the switch operating portion 11) and press the pressing portion 6a of the switch 6. it can. Therefore, the operability of the switch 6 is improved.

  In the present embodiment, the present invention is applied to a fire alarm device that detects smoke with a light emitting element and a light receiving element, but a fire alarm device that detects heat with a thermal element or a fire alarm device that detects flame with a pyroelectric element. It is possible to implement the present invention for various fire alarms. Furthermore, the present invention may be applied to an alarm device for detecting an abnormality.

1 is an external perspective view of a fire alarm device according to an embodiment of the present invention. It is a bottom view of the fire alarm which concerns on embodiment of this invention. It is an AA cross-sectional schematic diagram of FIG. It is a BB cross-sectional schematic diagram of FIG. It is an external appearance perspective view of the operation body concerning an embodiment of the invention. It is a cross-sectional schematic diagram which shows the operation state of the operating body which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Housing | casing, 2 main-body part, 2a lower surface part, 3 cover part, 3a rib, 3b recessed part, 3c opening part, 3d smoke inlet, 3e acoustic hole, 4 circuit board, 5 fire detection part, 6 switch, 6a pressing part DESCRIPTION OF SYMBOLS 10 Operation body, 11 Switch operation part, 11a Recessed part, 12 Operation surface, 12a 1st operation surface part, 12b 2nd operation surface part, 13 Shaft part, 14 Flat plate part, 14a Virtual extension surface, 15 String attachment part, 16 Contact, 20 drawstrings, 100 fire alarm.

Claims (6)

A state detector for detecting the state;
A circuit board on which the state detection unit and the switch are mounted;
An operating body for pressing the switch;
A housing having a main body and a cover, and housing the circuit board;
With
The operation body includes a switch operation unit and a shaft unit in which a plurality of operation surfaces are continuously provided,
The operation surface of the switch operation unit protrudes from an opening formed in the housing,
The alarm is characterized in that the shaft portion is rotatably held by a holding portion, and the operation body is rotatable along a direction in which the operation surface is continuously provided. The operating body is:
A flat plate portion is formed on the opposite side of the switch operation portion where the operation surface is formed,
The shaft portion is formed on the flat plate portion,
The switch operating unit is
2. The alarm device according to claim 1, wherein the alarm device is divided into a first operation surface portion and a second operation surface portion by a virtual extension surface obtained by extending the flat plate portion in the direction of the operation surface. At least one of the main body portion and the cover portion is formed with a recess that serves as the holding portion,
3. The alarm device according to claim 1, wherein the shaft portion is held in the concave portion when the cover portion is locked to the main body portion. 4. Between the holding part and the shaft part,
The alarm device according to any one of claims 1 to 3, wherein a gap longer than a gap formed between the switch operation unit and the switch is formed.   The alarm device according to any one of claims 1 to 4, wherein the operating body is provided with a string attaching portion for attaching a pull string. When the operation body is not operated,
The operating body is:
The alarm device according to any one of claims 1 to 5, wherein the switch is not pressed by its own weight.

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