JP4883044B2 - Wall-mounted alarm - Google Patents

Description

  The present invention relates to an improvement of an alarm device including a base portion attached to a wall surface and a main body portion detachable from the base portion.

  FIG. 5A is a perspective view showing a fire alarm as an example of the alarm, and FIG. 5B is a partially enlarged view of a mounting portion engaged with a screw as viewed from the front.

  This alarm device 1 has a so-called Dharma hole in which a through hole 13 for introducing a head of a screw 21 fixed to a wall surface and a long hole 14 for engaging with the screw 21 are continuously opened. The base portion 11 includes an attachment portion 15, and the main body portion 12 is combined with the base portion 11. The attachment portion 15 has a shape protruding from the outer peripheral portion of the main body portion 12 when the base portion 11 and the main body portion 12 are combined. The main body 12 includes a detection unit that detects a fire factor, a determination unit that determines the occurrence of a fire, an output unit that outputs an alarm sound, an operation unit that receives an operation such as an alarm stop, and the like. A battery compartment is also provided. Further, the operation string 16 led out from the main body is connected to a switch constituting the operation unit.

  The alarm device 1 can be easily attached to the wall surface by passing the screw 21 fixed to the wall surface through the through hole 13 of the attachment portion 15 and then engaging with the long hole 14. However, as shown in FIGS. 6 (a) and 6 (b), for example, if the alarm device 1 is swung with a chisel or the like during cleaning, the screw 21 comes out of the through-hole 13 and the alarm device 1 May fall.

As a technique for preventing such a fall, the following Patent Document 1 describes a plate-shaped metal fitting body, a hook projecting forward from the metal fitting body, and lower corners on both sides of the metal fitting body in a diagonally forward direction. A mounting bracket for an alarm device having a pair of bent retaining portions formed by bending and a pin insertion hole for inserting a retaining pin formed in each of the retaining portions is disclosed.
JP 2006-293665 JP

  However, in patent document 1, when attaching an alarm device to a wall surface, there was a problem that it was necessary to fix an attachment bracket to a wall surface first, and it took time and effort. Therefore, an object of the present invention is to provide an alarm device that can be easily attached to a wall surface with a screw such as a general wood screw and that can also prevent falling.

  In order to solve the above-mentioned problem, the first aspect of the present invention is an alarm device comprising a base portion having a mounting surface and a main body portion that is detachably assembled to the base portion, and is suspended from a wall surface by a predetermined screw. The base portion has a through-hole through which the head of the screw can be inserted in the peripheral portion of the mounting surface, and is long enough to communicate with the through-hole and pass only through the neck of the screw. A mounting portion in which a hole is formed extends from the peripheral portion, the main body portion has an outer peripheral wall corresponding to the peripheral portion, and when the main body portion is assembled to the base portion, The outer peripheral wall traverses the communicating portion between the through hole and the long hole.

  Further, the second aspect of the present invention is an alarm device comprising a base portion having a mounting surface and a main body portion detachably assembled to the base portion, wherein the base portion is suspended from a wall surface by a predetermined screw. The mounting surface is formed with a through hole through which the head of the screw can be inserted and a long hole that allows only the neck of the screw to pass therethrough. Corresponding to the hole, a protruding piece is formed on the surface facing the mounting surface of the base portion, and when the main body is assembled to the base portion, the protruding piece is connected to the through hole of the mounting hole portion. It crosses the communicating part with the long hole.

  The outer peripheral wall or the projecting piece is required to restrict the head of the screw engaged with the elongated hole as it is when the main body is assembled to the base. Therefore, the shape is not limited to a shape that crosses the communicating portion between the through hole and the long hole, and may be a shape that covers the through hole.

  The first and second aspects of the present invention are alarm devices that are installed by being hung on the wall surface with screws screwed into the wall surface. In particular, the alarm device is provided with a detection unit that detects a fire factor in the main body. Also good.

  The alarm device according to the first and second aspects of the present invention can be attached to the wall surface by an extremely easy procedure of first fixing the screw to the wall surface, hanging the base portion on the fixing screw, and covering the main body portion thereon. Even if the alarm is moved upward, the outer wall or the projecting piece of the main body part regulates the head of the screw, so that it does not move upward and does not fall from the wall surface. Further, since the outer wall or the projecting piece can be formed integrally with the main body portion, a special process for forming them is not required, and the manufacturing cost can be reduced.

  In particular, in the configuration in which the outer peripheral wall of the main body is used as a member for restricting the screw, it is not necessary to separately form another member for restricting the screw, so that the material can be saved and the cost can be reduced.

  On the other hand, in the configuration in which the mounting hole portion is formed on the mounting surface of the base portion, when the main body portion is assembled to the base portion, the mounting hole portion and the screw are concealed by the main body portion, so that the appearance is excellent. In many cases, a fire alarm or a gas alarm has a structure in which a base and a main body provided with a detection unit are separated to facilitate mounting on a ceiling or a wall. It is easy to apply the structure according to the second aspect of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a base portion and a main body portion of a wall-mounted alarm device according to the present invention, and FIG. 2 is a partial cutaway view combining the base portion and the main body portion of the alarm device. FIG. 3 is a perspective view showing a base portion and a main body portion of another wall-mounted alarm device according to the present invention, and FIG. 4 is a partial cutaway view combining the base portion and the main body portion of the alarm device.

  The alarm device 1 shown in FIGS. 1 and 2 is a fire alarm device that detects a fire factor such as smoke or heat and outputs an alarm, and can be attached to and detached from a base portion 11 attached to a wall surface. Main body 12. Although the base part 11 and the main-body part 12 are resin-made by injection molding, for example, there is no restriction | limiting in particular in the material. In addition, the base part 11 and the main-body part 12 are detachable, for example by the nail | claw provided in one of them, the engagement hole provided in the other, etc. (not shown).

  The main body 12 includes a detection unit that detects a fire factor such as smoke or heat, a determination unit that determines the occurrence of a fire, an output unit that outputs an alarm sound, an operation unit that receives an operation such as an alarm stop, and other alarm devices 1 A communication unit and the like for interlocking with the battery are built in, and a storage unit for storing a battery as a power source in a replaceable manner is also provided. The battery can be easily replaced because the base portion 11 and the main body portion 12 are detachable. The operation string 16 led out from the main body is connected to a switch constituting the operation unit.

  The base portion 11 has a through-hole (large-diameter hole) 13 through which the head of a screw 21 having a hemispherical head, such as a wood screw, can be inserted in the peripheral portion of the mounting surface 18. An attachment portion 15 that is communicated with the hole 13 and has a long hole 14 (small diameter hole) through which only the neck portion of the screw 21 can pass is extended from the peripheral portion. That is, the through-hole 13 and the long hole 14 form a so-called Dalma hole, and the large-diameter hole portion of the Dalma hole is located at the peripheral portion of the bottom surface, and the small-diameter hole portion protrudes outward from the peripheral portion. It has become.

  On the other hand, the outer peripheral wall 19 corresponding to the peripheral edge portion of the mounting surface 18 is formed in the main body portion 12, and when the main body portion 13 is assembled to the base portion 11, the outer peripheral wall 19 is formed between the through hole 13 and the long hole 14. It crosses the communication part. The shape of the outer peripheral wall 19 is required to restrict the head portion of the screw 21 engaged with the long hole 14 as it is when the main body portion 12 is assembled to the base portion 11. Therefore, the shape is not limited to a shape that crosses the communicating portion of the through hole 13 and the long hole 14, and may be a shape that covers the through hole 13. That is, the large-diameter hole portion of the Dalma hole formed in the base portion 11 is hidden by the outer peripheral wall 19 of the main body portion 12. In addition, since the outer peripheral wall 19 is formed over the entire outer periphery of the main body 12, the head of the screw 21 engaged with the long hole 14 no matter what direction the main body 12 is assembled to the base 11. The part can be regulated.

  The procedure for attaching the alarm device 1 to the wall surface is as follows. That is, the screw 21 is fixed to the wall surface by a driver or the like. At this time, the screw 21 is not screwed into the wall surface to the end, and the allowance for the alarm device 1 is left between the wall surface and the head of the screw 21. Next, the head of the screw 21 passes through the through-hole 13 by aligning the position of the head of the screw 21 with the through-hole 13 provided in the mounting portion 15 of the base 11 and then pressing the base 11 against the wall surface. The screw 21 is engaged with the long hole 14 by shifting the base portion 11 downward. Thereby, the base part 11 will be in the state drooped by the screw 21. And if the main-body part 12 is covered and fixed to the base part 11 maintaining this state, attachment of the alarm device 1 will be completed.

  FIG. 2 shows a state in which the base portion 11 and the main body portion 12 of the alarm device 1 are combined. In this state, the outer peripheral wall 19 is the head of the screw 21 even if the alarm device 1 is moved upward. Because it abuts the part, it does not move upward. Accordingly, since the head of the screw 21 does not reach the through hole 13, the alarm device 1 never comes off the screw 21 as long as the base portion 11 and the main body portion 12 are combined.

  As described above, the alarm device 1 can be attached to the wall surface by an extremely easy procedure, and does not fall off the wall surface after being attached. Further, since it is not necessary to separately form other members and structures for regulating the screw 21, the material can be saved and the cost can be reduced.

  The alarm device 1 shown in FIGS. 3 and 4 is an example in which the position of the mounting hole is different from the above. That is, in this example, the base portion 11 has a mounting hole portion in which a long hole 14 through which only the neck portion of the screw 21 can pass is connected to the mounting surface 18 of the through hole 13 through which the head portion of the screw 21 can be inserted. The main body portion 12 is formed with a projecting piece 17 on the surface facing the mounting surface 18 of the base portion 13 as a protrusion concentric with the outer peripheral wall 19 of the main body portion 12 corresponding to the mounting hole portion. ing. When the main body portion 12 is assembled to the base portion 11, the projecting piece 17 crosses the communication portion between the through hole 13 and the long hole 14 of the mounting hole portion or covers the through hole 13. In this example, since the projecting piece 17 is formed concentrically with the outer peripheral wall 19, the screw engaged with the long hole 14 is attached to the base portion 11 in any orientation. 21 heads are regulated.

  Since the other components of the alarm device 1 are common to the examples shown in FIGS. 1 and 2, the same reference numerals are given and description thereof is omitted.

  Similarly to the above, the alarm device 1 can be attached to the wall surface by an easy procedure of first fixing the screw 21 to the wall surface, hanging the base portion 11 on the fixing screw, and covering the main body portion 12 thereon. Since the screw 21 and the mounting hole are hidden by the main body 12, the appearance is excellent. Further, even if the alarm device after being attached is moved upward, the protruding piece 17 abuts against the head of the screw 21, so that it does not move upward and does not fall from the wall surface.

  In addition, although the fire alarm device was demonstrated as an Example above, this invention is applicable also to a gas alarm device etc. besides that, for example. In particular, fire alarms and gas alarms often have a structure in which a base and a main body provided with a detection unit are separated to facilitate mounting on a ceiling or wall. 2. The structure according to the present invention is easy to apply. The idea of the present invention can also be applied to a wall clock or the like composed of the base portion 11 and the main body portion 12.

It is the perspective view which showed the base part and main-body part of the wall hanging type alarm device by this invention. FIG. 3 is a partial cutaway view in which a base portion and a main body portion of a wall-mounted alarm device according to the present invention are combined. It is the perspective view which showed the base part and main-body part of the other wall hanging type alarm device by this invention. It is the fragmentary sectional view which combined the base part and main-body part of the other wall hanging type alarm device by this invention. (A) is the perspective view which showed the conventional alarm device, (b) is the elements on larger scale which looked at the attachment part engaged with a screw from the front. (A) Swinging of a conventional wall-mounted alarm device, (b) is a perspective view for explaining dropping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Alarm device 11 Base part 12 Main body part 13 Through-hole 14 Long hole 15 Attachment part 17 Projection piece 18 Attachment surface 19 Outer peripheral wall 21 Screw

Claims (3)

In an alarm device comprising a base portion having a mounting surface and a main body portion detachably assembled to the base portion, and suspended on a wall surface by a predetermined screw,
The base portion is formed with a through-hole through which the screw head can be inserted in the peripheral portion of the mounting surface, and is a long hole communicating with the through-hole and allowing only the neck of the screw to pass therethrough. The mounting part formed with is extended from the peripheral edge part,
The main body portion has an outer peripheral wall corresponding to the peripheral edge portion, and when the main body portion is assembled to the base portion, the outer peripheral wall crosses a communicating portion between the through hole and the long hole. An alarm device. In an alarm device comprising a base portion having a mounting surface and a main body portion detachably assembled to the base portion, and suspended on a wall surface by a predetermined screw,
The base portion has a mounting hole formed on the mounting surface thereof, in which a long hole through which only the neck of the screw can pass is communicated with a through hole through which the head of the screw can be inserted.
The main body portion has a protruding piece formed on a surface facing the mounting surface of the base portion corresponding to the mounting hole portion, and when the main body portion is assembled to the base portion, the protruding piece is An alarm device that crosses the communicating portion between the through hole and the long hole of the mounting hole. In any one of Claims 1-2.
An alarm device comprising a detector for detecting a fire factor in the main body.

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