Portable operating terminal

Abstract

To improve the shock resistance of portable operating terminals. [Solution] The portable field operation unit 70 comprises a housing with an opening 723, a monitor unit 78 housed in the housing and used for operating the fire extinguishing system, and a mounting bracket for fixing the monitor unit 78 to the housing in a position where the monitor unit 78 is exposed to the outside through the opening 723. Both ends of the mounting bracket have rising portions 743a and 743b that contact the inside of the sides 722b and 722d of the housing and rise along the sides 722b and 722d.

Description

Technical Field

[0001] The present invention relates to a portable operation terminal.

Background Art

[0002] Patent Document 1 describes forming a plate body of a portable electronic device from a light metal alloy.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Some fire extinguishing systems include a portable operation terminal used for operating the fire extinguishing system. In such an operation terminal, impact resistance performance that does not cause functional abnormalities even when dropped from a specified height is required. However, the structures of conventional portable operation terminals may not fully meet this requirement.

[0005] An object of the present invention is to improve the impact resistance performance of a portable operation terminal.

Means for Solving the Problems

[0006] One aspect of the present invention provides a portable operation terminal including a housing in which an opening is formed, a display unit housed in the housing and used for operating a disaster prevention system, and a fixing member for fixing the display unit to the housing at a position where the display unit is exposed to the outside from the opening, wherein both ends of the fixing member contact the inside of both side surfaces of the housing and have rising portions rising along the both side surfaces.

Effects of the Invention

[0007] According to the present invention, the shock resistance of a portable operating terminal is improved. [Brief explanation of the drawing]

[0008] [Figure 1] A diagram showing an example configuration of a fire extinguishing system according to the embodiment. [Figure 2] A plan view showing an example of a field control unit. [Figure 3] A bottom view showing an example of a field operation unit. [Figure 4] An exploded perspective view showing an example of a field control unit. [Figure 5] A bottom view showing an example of the internal configuration of a field control unit with the cover and housing cushioning removed. [Figure 6] A diagram illustrating an example of the effect of increasing the clearance of a through-hole. [Figure 7] Cross-sectional view of the internal structure of the field operation unit, cut along line II in Figure 5. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. Note that the dimensions, shapes, and proportions in the drawings may differ from those of the actual invention in order to facilitate understanding.

[0010] (Configuration of the fire extinguishing system) Figure 1 shows an example configuration of a fire extinguishing system 1 according to an embodiment. The fire extinguishing system 1 is a sprinkler system such as a water-discharge type head that extinguishes fires by releasing water when a fire occurs. The fire extinguishing system 1 is connected to a fire alarm system 2. The fire alarm system 2 includes a fire detector 20 and a fire alarm receiver 30. The fire extinguishing system 1 includes a central control panel 40, a plurality of nozzle units 50, a field control panel 60, and a field operation unit 70. The fire detector 20 and the fire alarm receiver 30 are connected via a circuit. The fire alarm receiver 30 and the central control panel 40 are connected via a circuit. The central control panel 40 and the plurality of nozzle units 50 are connected in a loop. The field control panel 60 and the plurality of nozzle units 50 are connected in a loop. Although only one fire detector 20 is shown as an example in Figure 1, the number of fire detectors 20 may be multiple. Similarly, although three nozzle units 50 are shown as an example in Figure 1, the number of nozzle units 50 may be two or fewer, or four or more.

[0011] The fire detector 20 is installed, for example, on the high ceiling of a building. The fire detector 20 detects a fire and transmits a fire signal to the fire receiver 30. Examples of fire detectors 20 include smoke detectors that detect smoke and flame detectors that detect flames. However, the targets that the fire detector 20 detects are not limited to smoke or flames; they may also be heat or carbon monoxide (CO).

[0012] The fire alarm receiver 30 is installed, for example, in the building's disaster prevention center. When the fire alarm receiver 30 determines that there is a fire based on the fire signal received from the fire detector 20, it transmits a fire signal to the central control panel 40. If a transmitter (not shown) is connected to the fire alarm receiver 30, the fire alarm receiver 30 may transmit a fire signal to the central control panel 40 in response to the pressing of a push button on the transmitter.

[0013] The central control panel 40 is installed, for example, in the building's disaster prevention center. The central control panel 40 remotely manages and controls the nozzle units 50. When the central control panel 40 receives a fire signal from the fire receiver 30, it sends a search start signal to all nozzle units 50, activating all nozzle units 50 and initiating the fire source search. When a fire source confirmation signal and a fire source location signal are received from a nozzle unit 50 that has detected a fire source through the fire source search, the central control panel 40 selects the nozzle unit 50 best suited for water discharge based on this fire source location signal. Then, the central control panel 40 sends a water discharge start signal to the selected nozzle unit 50, initiating water discharge.

[0014] The nozzle unit 50 is installed, for example, on the wall or ceiling of a building. The nozzle unit 50 searches for a fire source and sprays water towards the location of the fire source. The nozzle unit 50 is a movable head that rotates in a swirling direction and an elevation direction. When the nozzle unit 50 receives a search start signal from the central control panel 40, it is activated and rotates in the swirling and elevation directions to search for the fire source. When a fire source is detected by the fire source search, the nozzle unit 50 transmits a fire source confirmation signal and a fire source position signal to the central control panel 40 and rotates to face the direction of the fire source position and waits. This fire source position signal indicates the swirling angle and elevation angle when facing the direction of the fire source position. When the nozzle unit 50 receives a water discharge start signal from the central control panel 40, it transmits this water discharge start signal to the on-site control panel 60. When the corresponding activation valve (not shown) is opened by the on-site control panel 60, water is sprayed towards the fire source.

[0015] The on-site control panel 60 is installed, for example, near the location where the nozzle unit 50 is installed in a building. The on-site control panel 60 manages and controls the nozzle unit 50 on-site. When the on-site control panel 60 receives a water discharge start signal from the nozzle unit 50, it opens the activation valve (not shown) corresponding to that nozzle unit 50.

[0016] The water discharge mode of the fire extinguishing system 1 has an automatic mode and a manual mode. The automatic mode is a water discharge mode that automatically performs a series of operations from fire detection to water discharge. On the other hand, the manual mode is a water discharge mode that manually performs at least a part of these operations. In the manual mode, the central operation panel 40, the local control panel 60, or the local operation unit 70 is used to operate the nozzle unit 50. In particular, the local control panel 60 and the local operation unit 70 are used to operate the nozzle unit 50 on-site. This operation includes, for example, water discharge start, water discharge stop, and rotation operation of the nozzle unit 50.

[0017] The local operation unit 70 is a portable operation terminal used to operate the nozzle unit 50. The term "portable" as used here means that it can be carried by the user. The local operation unit 70 is detachably connected to the central operation panel 40 or the local control panel 60 via a cable 80. Usually, the local operation unit 70 is connected to and stored in the central operation panel 40. On the other hand, in the event of a fire, the local operation unit 70 may be removed from the central operation panel 40 by the user and carried to the installation location of the local control panel 60, where it is connected to the local control panel 60 and used. Note that the local operation unit 70 may be connected to the local control panel 60 via a connector box. The local control panel 60 has, for example, a touch screen and is used to operate the nozzle unit 50 on-site. The user can move to a place where the nozzle unit 50 is visible with the local operation unit 70 and operate the nozzle unit 50 while checking the state of the nozzle unit 50 by using the local operation unit 70 there. Note that the local operation unit 70 may be connected to and stored in the local control panel 60 usually. If there are multiple local control panels 60, the local operation unit 70 may be connected to and stored in only a part of the multiple local control panels 60, for example, at a ratio of one in every ten.

[0018] (Configuration of the local operation unit) FIG. 2 is a plan view showing an example of the on-site operation unit 70. FIG. 3 is a bottom view showing an example of the on-site operation unit 70. FIG. 4 is an exploded perspective view showing an example of the on-site operation unit 70. As shown in FIG. 4, the on-site operation unit 70 includes a housing 71, a mounting bracket 74, a circuit board 75, a monitor unit 78, and housing cushioning materials 79a and 79b.

[0019] The housing 71 is an exterior that constitutes the outside of the on-site operation unit 70. To be portable by the user, the housing 71 has a small substantially rectangular parallelepiped shape and is formed of a lightweight resin. The housing 71 is composed of a case 72 and a cover 73.

[0020] The case 72 houses the mounting bracket 74, the circuit board 75, and the monitor unit 78. The case 72 has a substantially rectangular parallelepiped shape with a taper. Of the six surfaces constituting the case 72, one surface is an opening surface that opens, and the opposite surface is the front surface 721. The remaining four surfaces are side surfaces 722a to 722d. The side surfaces 722a and 722c are located at both ends in the short side direction of the case 72. The side surfaces 722b and 722d are located at both ends in the long side direction of the case 72. The "long side direction" here refers to the direction along the longest side of the housing 71 among the directions along the front surface 721, for example, the left-right direction in FIG. 2. On the other hand, the "short side direction" refers to the direction orthogonal to the long side direction among the directions along the front surface 721, for example, the up-down direction in FIG. 2. The case 72 gradually narrows from the opening surface toward the front surface 721. The side surfaces 722a to 722d are inclined rather than perpendicular to the front surface 721.

[0021] An opening 723 for exposing the monitor unit 78 to the outside is formed in the front surface 721 at a position overlapping the monitor unit 78 in plan view. The opening 723 has a rectangular shape and has a size corresponding to the screen size of the monitor unit 78.

[0022] A monitor cushioning material 724 is provided around the opening 723. The monitor cushioning material 724 has a square shape that surrounds the opening 723 and is attached around the opening 723. To facilitate the installation of the monitor cushioning material 724, it may be composed of four I-shaped members combined together, or of two L-shaped members combined symmetrically. The monitor cushioning material 724 is located between the edge of the monitor unit 78 and the case 72. The edge of the monitor unit 78 is, for example, the frame portion around the screen of the monitor unit 78. The monitor cushioning material 724 is made of a material that has shock-absorbing properties, such as polyurethane foam or nonwoven fabric. When the field operation unit 70 is dropped, the monitor cushioning material 724 absorbs the impact caused by contact between the monitor unit 78 and the case 72, preventing the screen of the monitor unit 78 from cracking. The monitor cushioning material 724 is an example of a "cushioning material" according to the present invention.

[0023] Furthermore, four reinforcing studs 725a to 725d and four studs 726a to 726d are provided on the inside of the front panel 721. The reinforcing studs 725a to 725d are positioned at the four corners on the inside of the front panel 721. The reinforcing studs 725a to 725d are used to fix the cover 73 to the case 72. Each of the reinforcing studs 725a to 725d is hollow and cylindrical in shape, and protrudes from the front panel 721. Screws 701a to 701d are inserted into each of the reinforcing studs 725a to 725d.

[0024] Furthermore, the reinforced studs 725a to 725d also function as movement-restricting members that suppress the movement of the mounting bracket 74 due to the impact of the fall when the field operation unit 70 falls. Reinforced studs 725a and 725d are located between the mounting bracket 74 and the side surface 722a, while reinforced studs 725b and 725c are located between the mounting bracket 74 and the side surface 722c. The height of the reinforced studs 725a to 725d is greater than the height of the mounting bracket 74. Although the reinforced studs 725a to 725d are made of resin, they are reinforced with plate-like members and therefore have higher strength than ordinary studs. When the field operation unit 70 falls, if the mounting bracket 74 moves in the short-side direction of the housing 71 due to the impact of the fall, the reinforced studs 725a to 725d come into contact with the mounting bracket 74 and stop its movement. This suppresses the movement of the mounting bracket 74 due to the impact of the fall.

[0025] Studs 726a to 726d are provided at both ends in the longitudinal direction on the inside of the front surface 721. Studs 726a to 726d are used to fix the mounting bracket 74 to the case 72. Each of the studs 726a to 726d is hollow and cylindrical in shape and protrudes from the front surface 721. Hollow spacers 702a to 702d with bolts are inserted into the studs 726a to 726d. The height of the studs 726a to 726d is less than the height of the mounting bracket 74. The studs 726a to 726d are made of resin and are not reinforced like the reinforced studs 725a to 725d, so they are weaker than the reinforced studs 725a to 725d. Therefore, the studs 726a to 726d are prone to breaking when subjected to the impact of a fall if the field operating unit 70 falls.

[0026] A connection port 727 for the cable 80 is provided on the side 722a. The cable 80 is connected to the connection port 727. The connection port 727 is connected to the circuit board 75 via internal wiring.

[0027] The cover 73 has a rectangular shape that corresponds to the opening of the case 72 and covers the opening of the case 72. Through holes 731a to 731d are formed at the four corners of the cover 73, in positions that overlap with the reinforcing studs 725a to 725d in a plan view. The through holes 731a to 731d are used to fix the cover 73 to the case 72. Each of the through holes 731a to 731d has a circular shape in a plan view. Screws 701a to 701d are inserted into the through holes 731a to 731d, respectively.

[0028] The mounting bracket 74 is positioned between the circuit board 75 and the case 72, and fixes the monitor unit 78 to the case 72. The mounting bracket 74 has a length that fits snugly inside the case 72 in the longitudinal direction of the housing 71. The mounting bracket 74 is made of a metal with higher strength than the resin forming the case 72 so that it is less likely to deform if the field operation unit 70 falls. The mounting bracket 74 is an example of a "fixing member" according to the present invention.

[0029] The mounting bracket 74 has a base portion 741, stepped portions 742a and 742b, and rising portions 743a and 743b. The base portion 741 has an opening 744 formed in a position that overlaps with the monitor portion 78 in a plan view, allowing the monitor portion 78 to be exposed to the outside. The opening 744 is rectangular in shape and has a size corresponding to the screen size of the monitor portion 78. The base portion 741 also has four through holes 745a to 745d formed in a position that overlaps with the four corners of the circuit board 75 in a plan view. The through holes 745a to 745d are used to fix the circuit board 75 to the mounting bracket 74. Each of the through holes 745a to 745d is circular in shape in a plan view. Bolts 703a to 703d are inserted into the through holes 745a to 745d, respectively.

[0030] The stepped portions 742a and 742b are located on either side of the base portion 741 in the longitudinal direction of the housing 71. The stepped portions 742a and 742b have a stepped shape and are taller than the base portion 741. This creates a step between the base portion 741 and the stepped portions 742a and 742b. Through holes 746a to 746d are formed in the stepped portions 742a and 742b, respectively, at positions that overlap with the studs 726a to 726d of the case 72 in a plan view. The through holes 746a to 746d are used to fix the mounting bracket 74 to the case 72. Each of the through holes 746a to 746d has a circular shape in a plan view. Hollow spacers with bolts 702a to 702d are inserted into the through holes 746a to 746d. Hollow spacers with bolts 702a to 702d are an example of a "fastening member" according to the present invention.

[0031] The rising portions 743a and 743b are provided at the outer ends of the stepped portions 742a and 742b in the longitudinal direction of the housing 71, respectively. The rising portions 743a and 743b are formed by bending the outer ends of the stepped portions 742a and 742b in the longitudinal direction of the housing 71 at approximately a right angle to the stepped portions 742a and 742b, respectively. By providing the rising portions 743a and 743b, both ends of the mounting bracket 74 become L-shaped. Note that the rising portions 743a and 743b do not necessarily have to be formed by bending the ends of the stepped portions 742a and 742b; for example, they may be formed by connecting L-shaped members to the ends of the stepped portions 742a and 742b.

[0032] The rising portions 743a and 743b contact the inside of the sides 722b and 722d of the housing 71, respectively, and rise along the sides 722b and 722d in the direction from the stepped portions 742a and 742b toward the opening surface. Here, "rising" refers to a state in which they protrude in the direction from the stepped portions 742a and 742b toward the opening surface. Note that while the rising portions 743a and 743b rise at approximately right angles, the sides 722b and 722d are inclined, so the direction in which the rising portions 743a and 743b rise is not parallel to the plane direction of the sides 722b and 722d. However, since the rising portions 743a and 743b rise along a direction close to the plane direction of the sides 722b and 722d, it can be said that they rise along the sides 722b and 722d.

[0033] The circuit board 75 includes a control board 76 and a communication board 77. The control board 76 is positioned between the communication board 77 and the mounting bracket 74. The control board 76 is equipped with various electronic components such as a CPU and memory, and controls various parts of the field operation unit 70. The control performed by the control board 76 includes power control and display control of the monitor unit 78. The control board 76 has a roughly rectangular shape in plan view. Through holes 761a to 761d are formed at the four corners of the control board 76, respectively, in positions that overlap with the through holes 745a to 745d of the mounting bracket 74 in plan view. The through holes 761a to 761d are used to fix the communication board 77 to the control board 76 and to fix the control board 76 to the mounting bracket 74. Each of the through holes 761a to 761d has a circular shape in plan view. Bolts 703a to 703d are inserted into the through holes 761a to 761d, respectively.

[0034] The communication board 77 is positioned between the control board 76 and the cover 73. The communication board 77 is connected to the connection port 727 of the cable 80 via internal wiring and controls communication between the field operation unit 70 and the central operation panel 40 or the field control panel 60. The communication board 77 has a roughly rectangular shape in plan view. Through holes 771a to 771d are formed at the four corners of the communication board 77, respectively, in positions that overlap with the through holes 761a to 761d of the control board 76 in plan view. The through holes 771a to 771d are used to fix the communication board 77 to the control board 76. Each of the through holes 771a to 771d has a circular shape in plan view. Hollow spacers 705a to 705d with bolts are inserted into the through holes 771a to 771d.

[0035] The monitor unit 78 is provided on the control board 76 on the surface facing the opening 723 of the case 72. The monitor unit 78 is connected to the control board 76 via internal wiring. The monitor unit 78 has a roughly rectangular shape in plan view. The monitor unit 78 is exposed to the outside through the opening 723 of the case 72 via the opening 744 of the mounting bracket 74. The monitor unit 78 is fixed to the case 72 by the mounting bracket 74 in a position where it is exposed to the outside through the opening 723.

[0036] The monitor unit 78 is used to operate the nozzle unit 50. The monitor unit 78 includes, for example, a liquid crystal display and a touch panel. The liquid crystal display displays an operation image, and the touch panel detects the user's operation using that operation image. The input method of the touch panel is, for example, a resistive touch type. However, the input method of the touch panel is not limited to a resistive touch type, and other methods such as a capacitive touch type may also be used. The monitor unit 78 is an example of a "display unit" according to the present invention.

[0037] The housing cushioning materials 79a and 79b are provided to cover both ends of the housing 71 in the longitudinal direction. The housing cushioning materials 79a and 79b are made of a material that has shock-absorbing properties, such as rubber, and absorb the impact when the field operation unit 70 is dropped.

[0038] (Assembly method for the on-site control unit) When assembling the field operation unit 70, the communication board 77 and the control board 76 are first integrated and fixed to the mounting bracket 74. The bolted hollow spacers 705a to 705d are placed between the communication board 77 and the control board 76. One end of each bolted hollow spacer 705a to 705d passes through the through holes 771a to 771d in the communication board 77 from the control board 76 side, and nuts 706a to 706d are fastened to them. Since the communication board 77 and the control board 76 are connected via the bolted hollow spacers 705a to 705d, a certain distance is maintained between them. Female threads are formed on the other end of the bolted hollow spacers 705a to 705d. The bolts 703a to 703d each pass through the through holes 745a to 745d of the mounting bracket 74 and the through holes 761a to 761d of the control board 76 from the front 721 side of the housing 71, and are screwed into the other end of the hollow spacers 705a to 705d with bolts. As a result, the communication board 77 and the control board 76 are integrated and fixed to the mounting bracket 74.

[0039] Next, the mounting bracket 74 is fixed to the case 72. The bolted hollow spacers 702a to 702b are placed in the space between the stepped portion 742a of the mounting bracket 74 and the front surface 721. One end of each bolted hollow spacer 702a to 702d is screwed into the studs 726a to 726d of the case 72. The other ends of each bolted hollow spacer 702a to 702d pass through the through holes 746a to 746d of the mounting bracket 74 from the front surface 721 side, and nuts 704a to 704d are fastened. This fixes the mounting bracket 74 to the case 72. As described above, the monitor unit 78 is provided on the control board 76 on the surface facing the opening 723 of the case 72. Therefore, the communication board 77 and the control board 76 are integrated and fixed to the mounting bracket 74, and the mounting bracket 74 is fixed to the case 72, so that the monitor unit 78 is fixed to the case 72 in a position where it is exposed to the outside through the opening 723.

[0040] Next, the opening of the case 72 is closed with the cover 73, and housing cushioning materials 79a and 79b are attached to both ends of the housing 71 in the longitudinal direction. Screws 701a to 701d are passed through the through holes 731a to 731d of the cover 73 from the outside of the housing 71 and screwed into the reinforcing studs 725a to 725d of the case 72. This fixes the cover 73 to the case 72.

[0041] (Details and function of the through-holes in the mounting brackets) Figure 5 is a bottom view showing an example of the internal configuration of the field operation unit 70 with the cover 73 and housing cushioning materials 79a and 79b removed. As shown in Figure 5, the through holes 746a to 746d of the mounting bracket 74 have a larger clearance than usual. Here, "clearance" refers to the gap between the inner diameter of the through holes 746a to 746d and the outer diameter of the shafts of the bolted hollow spacers 702a to 702d that are inserted into the through holes 746a to 746d.

[0042] The sizes of the through holes 746a to 746d are determined based on the diameter of the shafts of the bolted hollow spacers 702a to 702d, and the clearance distance D1 between the reinforcing studs 725a to 725d and the mounting bracket 74, respectively. When the field operating unit 70 falls, the mounting bracket 74 may move in the shorter direction by the clearance distance D1 due to the impact of the fall. The clearance distance D1 indicates the distance the mounting bracket 74 can move in the shorter direction, and is therefore an example of the "size of the movable range" according to the present invention.

[0043] Here, we will explain using an example of the through-hole 746a, which is shown in an enlarged view in Figure 5. The through-hole 746a has a diameter such that the clearance distance D2 between the shaft of the bolted hollow spacer 702a and the through-hole 746a is greater than the clearance distance D1 between the reinforced stud 725a and the mounting bracket 74. For example, if the clearance distance D1 is 1 mm, the through-hole 746a has a diameter such that the clearance distance D2 is 2 mm. However, the diameter of the through-hole 746a is smaller than the diagonal distance of the nuts 704a fastened to the bolted hollow spacer 702a. The other through-holes 746b to 746d have the same diameter as the through-hole 746a.

[0044] Figure 6 illustrates an example of the effect of increasing the clearance between the through holes 746a and 746d. When the field operation unit 70 falls, the impact of the fall may cause the mounting bracket 74 to move in the direction of arrow A1 in Figure 6. This direction of arrow A1 indicates the short side of the housing 71. As mentioned above, since the mounting bracket 74 fits snugly inside the case 72 in the longitudinal direction of the housing 71, the mounting bracket 74 is unlikely to move in the longitudinal direction due to the impact of a fall.

[0045] As described above, the through-hole 746a has a diameter such that the clearance distance D2 between the shaft of the bolted hollow spacer 702a and the through-hole 746a is greater than the clearance distance D1 between the reinforced stud 725a and the mounting bracket 74. Therefore, when the mounting bracket 74 moves in the direction of arrow A1 in Figure 6, it first contacts the reinforced stud 725a, not the shaft of the bolted hollow spacer 702a. Because the reinforced stud 725a has high strength, it is less likely to break even when the mounting bracket 74 contacts it. Therefore, the reinforced stud 725a can absorb the impact of a fall and suppress the movement of the mounting bracket 74.

[0046] Because the mounting bracket 74's movement is restricted by the reinforced stud 725a, it is less likely to come into contact with the shaft of the bolted hollow spacer 702a. This reduces the impact of the fall transmitted to the stud 726a via the bolted hollow spacer 702a, preventing the stud 726a from breaking. Since the other through holes 746b to 746d have the same diameter as through hole 746a, this also prevents the other studs 726b to 726d from breaking.

[0047] If studs 726a to 726d break, the fixing of the monitor unit 78 will become loose, making it difficult to operate the monitor unit 78 by touch. Also, if the position of the monitor unit 78 shifts and part of the monitor unit 78 is not exposed to the outside through the opening 723, it may become impossible to operate using the operation image displayed on part of the monitor unit 78. However, as described above, by increasing the clearance of the through holes 746a to 746d, the studs 726a to 726d become less likely to break, thus preventing such problems.

[0048] (Details and function of the raised portion of the mounting bracket) Figure 7 is a cross-sectional view of the internal configuration of the field operation unit 70, cut along line II in Figure 5. As described above, the mounting bracket 74 has a length that fits snugly inside the case 72 in the longitudinal direction of the housing 71. Therefore, the rising portions 743a and 743b of the mounting bracket 74 contact the inside of the sides 722b and 722d of the case 72, respectively. In addition, since the rising portions 743a and 743b of the mounting bracket 74 rise along the sides 722b and 722d, respectively, the contact area is larger compared to when the rising portions 743a and 743b are not present.

[0049] Furthermore, because the sides 722b and 722d are inclined, gaps are created in some parts between the rising portion 743a and the side 722b, and between the rising portion 743b and the side 722d. Cushioning materials 747a and 747b are provided between the rising portions 743a and 743b and the sides 722b and 722d, respectively, to fill these gaps. The cushioning materials 747a and 747b are made of materials that have shock-absorbing properties, such as polyurethane foam or nonwoven fabric. When the field operation unit 70 falls, the cushioning materials 747a and 747b absorb the impact caused by the contact between the rising portions 743a and 743b and the case 72, and prevent the mounting bracket 74 from shifting position.

[0050] When the on-site operation unit 70 falls, the housing 71 attempts to deform in a direction that compresses it due to the impact of the fall. However, inside the housing 71, a mounting bracket 74, which is stronger than the housing 71, fits snugly inside the case 72 in the longitudinal direction of the housing 71, and the rising portions 743a and 743b are in contact with the sides 722b and 722d of the case 72. Therefore, when an impact occurs from the fall, the mounting bracket 74 exerts a pushing force from the inside in the longitudinal direction of the housing 71, absorbing the impact of the fall. As a result, deformation of the housing 71 is suppressed.

[0051] According to the embodiment described above, when the field operation unit 70 falls, the impact of the fall is absorbed by the rising portions 743a and 743b of the mounting bracket 74, thereby improving the impact resistance of the field operation unit 70. In addition, by increasing the clearance of the through holes 746a to 746d, the studs 726a to 726d are less likely to break even if the mounting bracket 74 moves due to the impact of a fall. This prevents inconveniences related to the operation of the monitor unit 78 that may occur due to the breakage of the studs 726a to 726d.

[0052] (modified version) The present invention is not limited to the embodiments described above, and may be modified as follows. The following modifications may be used individually or in combination.

[0053] In the embodiment described above, the rising portions 743a and 743b of the mounting bracket 74 may be provided at both ends in the short direction of the mounting bracket 74, or they may be provided at both ends in the longitudinal direction and both ends in the short direction of the mounting bracket 74. This configuration also improves the impact resistance of the field operation unit 70.

[0054] In the embodiments described above, the monitor unit 78 does not necessarily have to include a touch panel. The monitor unit 78 may include a display unit such as a liquid crystal display and an operation unit such as operation buttons. Alternatively, the monitor unit 78 may have only a display unit such as a liquid crystal display and no operation unit. Even if the monitor unit 78 has only a display unit, the user operates the nozzle unit 50 based on the information indicating the status of the nozzle unit 50 displayed on the display unit, so it can be said that the monitor unit 78 is used for operating the nozzle unit 50.

[0055] In the above-described embodiment, a rubber nut may be provided between the bolted hollow spacers 702a to 702d and the mounting bracket 74 or studs 726a to 726d. With this configuration, the rubber nut can absorb the impact of a fall transmitted to the stud 726a via the bolted hollow spacer 702a.

[0056] In the embodiment described above, the studs 726a to 726d of the case 72 may be reinforced with hot melt adhesive. This configuration can increase the strength of the studs 726a to 726d.

[0057] In the embodiment described above, the fire alarm system 2 may be a P-type system or an R-type system. In the case of an R-type system, the fire detector 20 measures physical quantities related to the fire and transmits analog values ​​representing the measured physical quantities to the fire receiver 30. Physical quantities related to the fire include smoke concentration and infrared radiation levels. The fire receiver 30 determines whether there is a fire based on the physical quantities indicated by the analog values ​​received from the fire detector 20 and transmits a fire signal to the central control panel 40.

[0058] The present invention may also be applied to fire prevention systems other than sprinkler systems, such as water-spraying heads. Fire prevention systems include, for example, fire extinguishing equipment other than sprinkler systems, fire alarm systems, and fire prevention / smoke control equipment. The fire prevention system is equipped with a portable operating terminal having a structure similar to that of the on-site operating unit 70. This portable operating terminal is used by users to operate the fire prevention system.

[0059] In the embodiments described above, the configuration, functions, and operation of the fire extinguishing system 1 are not limited to the examples described above. Each of the fire detectors 20, fire receivers 30, central control panel 40, nozzle unit 50, field control panel 60, and field operation unit 70 constituting the fire extinguishing system 1 may have a configuration different from that described in the embodiments described above, or may be configured without some of the components. The shape, structure, material, arrangement, and number of each part constituting the field operation unit 70 may be appropriately changed from those described in the embodiments described above. Each of the fire detectors 20, fire receivers 30, central control panel 40, nozzle unit 50, field control panel 60, and field operation unit 70 constituting the fire extinguishing system 1 may have a function different from that described in the embodiments described above, or may be configured without some of the functions. Furthermore, in the fire extinguishing system 1, the functions of one device may be distributed among multiple devices, or the functions of multiple devices may be combined into one device. The processing procedure of the fire extinguishing system 1 may be rearranged as long as it is not contradictory. Furthermore, some of the processing procedures of the fire extinguishing system 1 may be omitted.

[0060] Another embodiment of the present invention may provide a method having steps of processing performed in at least one of the following: fire extinguishing system 1, fire detector 20, fire receiver 30, central control panel 40, nozzle unit 50, field control panel 60, and field operation unit 70. Yet another embodiment of the present invention may provide a program to be executed in the fire detector 20, fire receiver 30, central control panel 40, nozzle unit 50, field control panel 60, or field operation unit 70. This program may be provided stored on a computer-readable recording medium or provided by download via the Internet or the like. [Explanation of Symbols]

[0061] 70: On-site operation unit, 71: Housing, 72: Case, 73: Cover, 74: Mounting bracket, 75: Circuit board, 76: Control board, 77: Communication board, 78: Monitor section, 79a~79b: Housing cushioning material, 702a~702d: Hollow spacer with bolt, 704a~704d: Nut, 721: Front, 722a~722d: Side, 723: Opening, 724: Monitor cushioning material, 725a~725d: Reinforced stud, 726a~726d: Stud, 727: Connection port, 741: Base, 742a~742b: Stepped section, 743a~743b: Rising section, 744: Opening, 745a~745d: Through hole, 746a~746d: Through hole, 747a: Cushioning material

Claims

1. A housing with an opening formed therein, The aforementioned enclosure houses a display unit used for operating the disaster prevention system, The display unit is positioned so that it is exposed to the outside through the opening, and the fixture includes a fixing member for fixing the display unit to the housing. Both ends of the fixing member contact the inside of both sides of the housing and have rising portions that extend along both sides. A portable operating terminal characterized by the following features.

2. A cushioning material is provided between the aforementioned rising portion and the side surface of the housing. The portable operating terminal according to feature 1.

3. The fixing member has a through hole into which a fastening member for fixing the fixing member to the housing is inserted. The gap between the fastening member and the through hole is greater than the range of motion of the fixing member in the planar direction of the fixing member. The portable operating terminal according to feature 1.

4. The housing is provided with a movement-restricting member between the fixing member and the side surface of the housing, which suppresses the movement of the fixing member due to impacts received by the housing. The size of the movable range is the distance between the fixed member and the movement-restricting member. The portable operating terminal according to feature 3.

5. A cushioning material is provided between the edge of the display unit and the housing. The portable operating terminal according to feature 1.

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