Base for detector and fire alarm equipment including base for detector

Abstract

To provide a base and fire alarm equipment that facilitate installation of wires and signal lines and reduce the thickness of the fire alarm equipment including the base.SOLUTION: A base includes: a housing having a cylindrical body that is fitted into a mounting hole formed in an installation surface, and an opening that opens toward a monitored area and is detachably closed by a detector; and a terminal that is housed in the housing and has a turning end and a mounting surface for wires and signal lines on the opposite side of the turning end. The terminal is configured to be able to take a first position in which the mounting surface faces the opening and a second position in which the mounting surface faces the inner peripheral surface of the housing.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a base for a detector and a fire alarm system including the base for a detector. [Background technology]

[0002] For example, Patent Document 1 (JP 2021-189711 A) discloses a terminal block including a metal terminal electrically connected to a circuit board, a terminal block case made of an insulating material that houses the terminal, and a pressure spring that can come into contact with a portion of the terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-189711 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the terminal block described in the above-mentioned patent document, the electric wires and the signal wires must be attached above the installation surface such as the ceiling, which is troublesome and requires time and effort. In addition, the thickness of the fire alarm system increases by the length of the terminal block.

[0005] Therefore, an object of the present invention is to provide a sensor base and a fire alarm system that allows easy installation of electric wires and signal wires and reduces the thickness of the fire alarm system including the sensor base. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides: a housing having a cylindrical main body that is fitted into a mounting hole formed on an installation surface, and an opening that opens toward a monitoring area and is detachably closed by a sensor; a terminal housed in the housing and having a rotation end and an attachment surface for electric wires and signal wires on an opposite side to the rotation end, the terminal has a configuration capable of taking a first position in which the mounting surface faces the opening (i.e., a position that makes it easy to mount the electric wires and the signal wires) and a second position in which the mounting surface faces the inner peripheral surface of the housing (i.e., a position that allows the sensing unit to be mounted in the opening); A base for a sensor, comprising:

[0007] In the sensor base of the present invention, it is preferable that the rotating end is attached to a bottom portion located on the opposite side of the housing from the opening.

[0008] In the sensor base of the present invention, it is preferable that the rotating end is attached to the outside in the radial direction at the bottom.

[0009] In the sensor base of the present invention, it is preferable that the terminal has a claw portion protruding from the mounting surface.

[0010] In the sensor base of the present invention, it is preferable that a thickness of the terminal is smaller than the difference between a depth of the housing and a thickness of a fitting portion of the sensor that fits into the housing.

[0011] The sensor base of the present invention preferably further comprises an arm attached to the outer surface of the housing and sandwiching the installation surface between the arm and the flange.

[0012] The present invention also provides a fire alarm system comprising the above-described sensor base and a sensor to be attached to the opening. Effect of the Invention

[0013] According to the present invention, the terminals are housed in the housing of the detector base and are rotatable. Therefore, when the electric wires and the signal wires are attached, the attachment surface can be faced toward the worker, and when the detector is attached to the detector base, the terminals do not become bulky. Therefore, the work of attaching the electric wires and the signal wires can be easily performed, and the thickness of the fire alarm system including the detector base can be reduced. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a fire alarm system 1 according to an embodiment of the present invention. [Diagram 2] 2 is a perspective view of the sensor base 3 and the sensor 5 with the terminal 33 in the stored position. FIG. [Diagram 3] 2 is a perspective view of the sensor base 3 and the sensor 5 with the terminal 33 in a rotated position. FIG. [Figure 4] 1A to 1C are a front view, a rear view, a left side view, a top view, and a bottom view of a sensor base 3 with a terminal 33 in a stored position. [Diagram 5] FIG. 2 is a perspective view of the sensor base 3 with the terminal 33 in the stored position. [Figure 6] 3A and 3B are a front view and a perspective view of the sensor base 3 with the terminal 33 in a rotated position. [Figure 7] 5A to 5C are front view, rear view, left and right side view, top view, and bottom view of the sensor 5. [Figure 8] FIG. 2 is a partial cross-sectional view corresponding to FIG. [Figure 9] FIG. 3 is a partial cross-sectional view corresponding to FIG. 2. [Figure 10] FIG. 4 is a partial cross-sectional view corresponding to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Representative embodiments of the fire alarm system and the detector base according to the present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to these drawings. In addition, since the drawings are for conceptually explaining the present invention, the dimensions, ratios, and numbers may be exaggerated or simplified as necessary for easy understanding.

[0016] The fire alarm system 1 is attached to an installation surface 9 such as a ceiling, and detects and notifies a fire. As shown in FIGS. 1 to 3, the fire alarm system 1 includes a detector base 3 (hereinafter referred to as the base 3 ) and a detector 5 that is detachably mounted on the base 3 . The base 3 and the sensor 5 will now be described in detail.

[0017] First, base 3 will be explained. The base 3 serves to connect electric wires and signal wires (neither of which are shown) to the sensor 5, and is attached to an installation surface 9 such as a ceiling (see FIG. 8). For example, as shown in FIG. 4, the base 3 includes a housing 31 and a terminal 33 .

[0018] The housing 31 has a cylindrical main body 311 that fits into a mounting hole 91 formed in the installation surface 9 (see FIG. 8). In other words, the main body 311 is a hollow cylinder. For example, as shown in FIG. 4, a bottom 313 is provided at one end of the main body 311, and the other end (open end) is open. The bottom 313 is formed with a hole 313A for inserting electric wires and signal wires therethrough.

[0019] The housing 31 has an opening 315 that opens toward a monitoring area such as a room at an open end of the main body 311. The opening 315 is detachably closed by a sensor 5 (see FIG. 8).

[0020] Housing 31 may have flange 317 that protrudes radially outward from the edge of opening 315, i.e., the opening end. Alternatively, flange 317 may extend from the opening end along the monitoring area side of installation surface 9. Housing 31 is fixed to installation surface 9 by attaching flange 317 to installation surface 9 with screws or the like. Flange 317 may be formed around the entire circumference of the opening end (see FIG. 4, for example), or may be formed only on a part of the opening end. The housing 31 can be produced as a molded product made of resin.

[0021] A terminal 33 is housed within the housing 31 . The terminal 33 connects the electric wires and the signal wires (neither of which are shown) to the substrate 55 of the sensor 5. That is, the terminal 33 serves to connect the electric wires and the signal wires to the substrate 55 of the sensor 5 via the contact portions 35, 37, 57, and 59.

[0022] Terminal 33 has a generally rectangular shape and has a rotating end 331 and a mounting surface 333 for electric wires and signal wires on the opposite side to rotating end 331 (see FIG. 5). Mounting surface 333 is formed with insertion openings 333A and B for electric wires and signal wires.

[0023] The terminal 33 is rotatably attached to the bottom 313 of the main body 311 . Specifically, a rotation shaft 331A is provided at the rotation end 331, and the rotation shaft 331A is rotatably supported by a pair of bearings (not shown) fixed to the bottom 313. This allows the terminal 33 to rotate freely with respect to the bottom 313. That is, the terminal 33 is configured to be rotated so as to reversibly take an attachment position (first position; see FIG. 6) in which the attachment surface 333 faces the opening 315 and facilitates attachment of the electric wires and the signal wires, and a storage position (second position; see FIG. 5) in which the attachment surface 333 faces the inner circumferential surface of the housing 31 and allows attachment of the sensing unit to the opening 315.

[0024] From the viewpoint of ease of attachment of electric wires and signal wires, the rotation angle of terminal 33 with respect to bottom portion 313 is preferably 60° to 120°, and more preferably 80° to 100°.

[0025] 4(A), the pivot end 331 of the terminal 33 is attached to the outside in the radial direction at the bottom portion 313. In other words, the pivot end 331 and the bearing (not shown) are disposed closer to the edge of the bottom portion 313 than to the center of the bottom portion 313.

[0026] Therefore, in the stored position, the mounting surface 333 is located near the center of the main body 311 and faces the inner peripheral surface of the main body 311 (see, for example, FIG. 5). At this time, since the hole 313A faces the mounting surface 333 (see FIG. 4(A)), it is possible to prevent the electric wires and the signal wires from being bent and damaged. Furthermore, in the mounting position, the mounting surface 333 faces the monitoring area, that is, the operator (see FIG. 6, for example), facilitating the work of mounting the electric wires and the signal wires.

[0027] The insertion openings 333A and 333B are electrically connected to a pair of bearings (not shown), respectively. In addition, the pair of bearings (not shown) are electrically connected to the contact portions 35 and 37, respectively. The contact portions 35 and 37 are disposed to face the opening 315 (see, for example, FIG. 4(A)). Therefore, the contact portions 35 and 37 engage with the contact portions 57 and 59 of the sensor 5 to electrically connect the electric wires and the signal line to the substrate of the sensor 5 (see FIG. 8).

[0028] The terminal 33 may have a claw portion 335 protruding from the mounting surface 333 (see FIG. 5, for example). An operator can easily rotate the terminal 33 by hooking a finger on the claw portion 335.

[0029] As can be easily understood from FIGS. 8 and 9, it is preferable that the thickness T1 of the terminal 33 is smaller than the difference between the depth D of the housing 31 and the thickness T2 of the fitting portion 51A of the sensor 5. That is, T1 < D - T2. The difference between T1 and D - T2, that is, the gap G (see FIG. 8) between the terminal 33 in the storage position and the fitting portion 51A of the sensor 5 is preferably 0 mm to 1 mm. Thereby, while ensuring the ease of the mounting work of the electric wire and the signal wire, the thickness of the combined base 3 and sensor 5 can be suppressed, and the fire alarm facility 1 can be configured more compactly.

[0030] For example, when the depth D of the housing 31 is 23.5 mm and the thickness T1 of the fitting portion 51A of the sensor 5 is 9 to 11 mm, it is preferable that the thickness T2 of the terminal 33 is 14.2 mm.

[0031] The base 3 may further include a pair of arms 39. The arm 39 is a plate-like member attached to the outer surface of the housing 31. The arm 39 is attached onto the housing 31 by fixing means such as screws, and thereby presses the installation surface 9 at its tip, and can sandwich the installation surface 9 between it and the flange portion 317 (see FIG. 8).

[0032] The work of mounting and wiring the base 3 to the mounting hole 91 of the installation surface 9 is performed as follows. Rotate the terminal 33 to the mounting position shown in FIG. 3 from the storage position shown in FIG. 2. Pull out the electric wire and the signal wire arranged on the installation surface 9 (for example, in the ceiling space) from the mounting hole 91 to the monitoring area side, and insert them through the hole 313A at the bottom 313 of the main body 311. Fit the housing 31 into the mounting hole 91 from the monitoring area side, and fix the flange portion 317 to the installation surface 9 with screws or the like. At the same time, tighten the arm 39 with screws or the like, and press the installation surface 9 with the tip of the arm 39. Thereby, the base 3 is fixed to the installation surface 9 (see FIG. 8 for the pressing of the installation surface 9 by the arm 39).

[0033] Next, the electric wires and the signal wires are inserted into the mounting surface 333 of the terminal 33. This operation can be performed from the monitoring area side. Then, the terminal 33 is rotated from the mounting position to the storage position. When removing the base 3 from the installation surface 9, the above steps can be reversed.

[0034] When replacing the electric wires and the signal wires, the following procedure should be followed. That is, the terminal 33 is rotated from the storage position to the mounting position. The electric wires and the signal wires are removed from the mounting surface 333. The new electric wires and signal wires are inserted from the installation surface 9 through the hole 313 A of the housing 31 and then inserted into the mounting surface 333 of the terminal 33 . The terminal 33 is rotated from the mounting position to the storage position.

[0035] Next, the sensor 5 will be described with reference to FIG. The detector 5 detects the occurrence of a fire and transmits a fire signal or a fire information signal to a receiver, a repeater, or a fire extinguishing system. The detector 5 may be any of a heat detector, a smoke detector, and a flame detector, or any combination of these. Here, a heat detector will be described as an example of the detector 5.

[0036] The detector 5 includes a housing 51, a detector unit 52, a protective member 53, and a light emitter 54. The detector 5 is installed so that the detector unit 52 and the protective member 53 face the monitoring area.

[0037] The housing 51 houses various components such as the light emitter 54 and the substrate 55. The outer surface of the housing 51 (the surface from which the sensing unit 52 protrudes) is flat so as not to impede the visibility of the protective member 53. Also, the housing 51 is partially fitted into the opening 315 of the base 3 to form a fitting portion 51A. The substrate 55 is, for example, a printed wiring board, and has electronic components (not shown) such as a processor or a microcontroller mounted thereon in addition to the light emitter 54. The substrate 55 is electrically connected to the contact portions 57 and 59.

[0038] The sensing unit 52 senses a physical quantity such as heat, etc. The sensing unit 52 is provided so as to protrude from inside the housing 51 to outside the housing 51 in order to detect heat, etc. from the monitored area.

[0039] A thermistor can be suitably used as the sensing unit 52. The monitored area is monitored by utilizing the fact that the electrical resistance of the thermistor changes due to heat. The sensing result of the sensing unit 52 is transmitted to a processor or microcontroller (not shown) on the board 55 and is used to control the light emitter 54.

[0040] The light-emitting body 54 is an indicator light that emits light when the sensor 52 senses a predetermined amount of the physical quantity. In this embodiment, the light-emitting body 54 is disposed inside the housing 51, but the light-emitting body 54 may be disposed outside the housing 51.

[0041] A light emitting diode (LED) is preferably used as the light emitting body 54, but is not limited thereto. There is no limitation on the color of the light emitted by the light emitting body 54, but considering that the indicator light has a warning function, red light is preferable.

[0042] The protective member 53 is a member protruding from the housing 51, and surrounds the sensing unit 52 to protect the sensing unit 52. The protective member 53 is transparent or translucent, and is disposed so as to face the light emitter 54, and transmits light from the light emitter 54. The protective member 53 may be a resin member colored milky white, and preferably has a light transmittance of 10% to 90%. As a material for the protective member 53, for example, a thermoplastic resin such as a polycarbonate resin can be suitably used, but is not limited thereto.

[0043] The sensor 5 is attached to the base 3 as follows. The terminal 33 of the base 3 is placed in the storage position. The fitting portion 51A of the sensor 5 is inserted into the opening 315 of the base 3, and the sensor 5 is rotated to engage the contact portions 35 and 37 of the base 3 with the contact portions 57 and 59 of the sensor 5, respectively. This electrically connects the substrate 55 of the sensor 5 to the electric wires and the signal wires.

[0044] Conversely, when removing the sensor 5 from the base 3, the sensor 5 is rotated relative to the base 3 to release the engagement between the contact portions 35, 37. Then, the sensor 5 is removed from the base 3.

[0045] In such a fire alarm system 1 (detector 5), when the sensing unit 52 detects a predetermined physical quantity (for example, heat), the light emitter 54 lights up. The light from the light emitter 54 passes through the protective member 53 and exits to the outside of the protective member 53. This makes the protective member 53 appear to be emitting light from the outside. The protective member 53 occupies a larger area than when it is lit, and is visible from all directions. In other words, the visibility of the indicator light is improved.

[0046] Furthermore, in the sensor 5, a light guide is not used to guide the light from the light emitter 54, and the light from the light emitter 54 is transmitted through the protective member 53, causing the protective member 53 to glow overall. In other words, the protective member 53 has both a function of protecting the sensing unit 52 and a function as an indicator light. Therefore, the number of parts can be reduced and manufacturing costs can be suppressed compared to when the protection of the sensing unit and the indicator light are configured as separate parts.

[0047] The above describes a fire alarm system and a sensor base as one embodiment of the present invention, but the present invention is not limited to these. Various design modifications are possible as long as the technical concept of the present invention is maintained, and all such design modifications are included within the technical scope of the present invention. [Explanation of symbols]

[0048] 1. Fire alarm system 3 Sensor base 31 Case 311 Main unit 313A hole 33 Terminal 331 Rotating end 333 Mounting surface 5 Sensor 9 Installation surface 91 Mounting hole

Claims

1. a housing having a cylindrical main body that is fitted into a mounting hole formed on an installation surface, and an opening that opens toward a monitoring area and is detachably closed by a sensor; a terminal housed in the housing and having a rotation end and an attachment surface for electric wires and signal wires on an opposite side to the rotation end, the terminal can take a first position in which the mounting surface faces the opening side and a second position in which the mounting surface faces an inner peripheral surface side of the housing; A base for a sensor comprising:

2. The rotating end is attached to a bottom portion of the housing that is located on the opposite side to the opening.

2. The sensor base according to claim 1,

3. The rotating end is attached radially outwardly at the bottom; 3. The sensor base according to claim 2, further comprising:

4. The terminal has a claw portion protruding from the mounting surface; 2. The sensor base according to claim 1,

5. The thickness of the terminal is smaller than the difference between the depth of the housing and the thickness of a fitting portion of the sensor that fits into the housing; 2. The sensor base according to claim 1,

6. A sensor base according to claim 1; A sensor mounted in the opening; and Fire alarm equipment equipped with the above.

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