Extra Telephone Device

Abstract

To provide an emergency telephone apparatus which makes a handset less likely to be removed (fall and displacement) and enables taking-out operation and attachment operation of the handset to be easily conducted.SOLUTION: An emergency telephone apparatus includes: a handset (26); a pedestal (25) in which a least a part of the handset is placed in a vertical attitude; and a box-shaped housing case (24) which houses the handset and the pedestal. An upper wall of the housing case (24) has: a support piece (41) which is disposed so as to incline downward from the front side to the rear side of the housing case and in which a tip may move vertically with a base part side set as a rotation supporting point; and pressing means (44, 46) which presses the support piece downward. The tip of the support piece is located close to and faces an upper surface of the handset.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a telephone apparatus provided with a handset and a housing case, and relates to a technology effective for use in an emergency telephone apparatus used, for example, in a disaster prevention monitoring system (including a fire alarm system).

Background Art

[0002] In a disaster prevention monitoring system, an emergency telephone apparatus for confirming the situation at the scene by phone using a first reporter near the fire occurrence site and the handset of a sub-unit when a fire occurs is installed in a monitoring center or the like. The emergency telephone apparatus (master unit) generally has a configuration in which when the off-hook operation of the handset on the sub-unit side is performed, the calling sound of the master unit sounds, and when the off-hook operation of the handset on the master unit side is performed, the calling sound stops, and a communication line between the handsets on the master unit side and the sub-unit side is opened so that a call can be made between the master unit and the sub-unit.

[0003] However, if the handset of the emergency telephone apparatus (master unit) is detached for some reason, the off-hook state of the handset is indicated by the lighting of a lamp according to the standard of the emergency telephone apparatus. When the handset of the sub-unit is off-hook (a call request due to a fire occurrence) in such a state, both the handsets of the master unit and the sub-unit are in the off-hook state, and the calling sound of the call request due to a fire occurrence from the sub-unit on the master unit side does not sound, and the communication line becomes an open state (a state where a call can be made). In this case, on the master unit side, the calling sound of the call request due to a fire occurrence from the sub-unit does not sound, and a situation will occur where the incoming call (call request due to a fire occurrence) from the sub-unit side is not noticed.

[0004] The main reason why the handset of an emergency telephone system becomes detached is that, when the handset is placed vertically, conventional handsets are simply attached by a recess formed at the boundary between the upper receiver and the central handle, which catches on a projection (step) on the base (support). Therefore, if any force is applied to the handset directly or indirectly, it may become detached or shift from its correct mounting position. For example, if a worker's (manager's) shoulder, elbow, or an object unintentionally comes into contact with the handset, or if vertical vibrations are applied due to opening or closing the door of the device equipped with the emergency telephone system, or due to an earthquake, the handset may become detached from its mounting position on the telephone body or shift from its correct mounting position.

[0005] Therefore, for the telephone equipment on the base station side of an emergency call system, there is a demand for a structure that makes it difficult for the handset to detach (fall off or shift) from the telephone body. Patent documents 1 and 2 describe inventions that prevent the handset, which is mounted vertically on the telephone body, from falling off by providing a telephone holder or pressing part (plate-shaped elastic member) above the handset that presses toward the hook below. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2002-27068 [Patent Document 2] Japanese Patent Publication No. 2022-10911 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, in the telephone devices of the inventions described in Patent Documents 1 and 2, the telephone holder and pressing part are configured to incline downward toward the front from the mounting surface of the stand (receiver), so when removing the handset, it is necessary to lift the handset horizontally or diagonally while pulling it out toward the front, and the pressing force from the telephone holder and pressing part affects the removal of the handset while lifting it horizontally or diagonally. Conversely, when attaching the handset to the stand (receiver), it is necessary to push the telephone holder and pressing part upward with the top of the handset while pushing the handset in, which also affects the attachment operation of the handset. Furthermore, in the telephone devices of the inventions described in Patent Documents 1 and 2, the telephone holder and pressing part are in contact with the top of the handset, and a pressing force is constantly applied to the top of the handset, so there is a problem that the top of the handset is easily scratched.

[0008] This invention was made in view of the above-mentioned problems, and its purpose is to provide an emergency telephone device in which the handset is less likely to come loose (fall out or become misaligned) and in which the handset can be easily removed and attached. Another object of the present invention is to provide an emergency telephone device that is less prone to damage to the top of the handset, even when a function to prevent the handset from coming off is provided. [Means for solving the problem]

[0009] To solve the above problems, the invention of this application is: An emergency telephone system comprising a handset, a base on which at least a portion of the handset is placed in an upright position, and a box-shaped housing case for housing the handset and the base, The above-mentioned storage case has a support piece mounted on its upper wall so as to slope downward from the front to the rear of the storage case, with its base serving as a pivot point and its tip being able to move up and down, and a pressing means for pressing the support piece downward, The support piece That The tip 、 On the upper surface of the aforementioned handset A distance is maintained such that there is no contact, and even if the handset is lifted by a predetermined amount due to vibration, it will not detach from the base. It is configured to face each other.

[0010] According to the emergency telephone device having the above configuration, the tip is on the top surface of the handset. A distance is maintained such that there is no contact, and even if the handset is lifted by a predetermined amount due to vibration, it will not detach from the base. Because opposing support pieces are provided, Even if the handset vibrates up and down due to an earthquake or other event, the tip of the support piece will hit the top surface of the handset, preventing it from rising above a predetermined height. The handset is less likely to come loose (fall out or become misaligned). Furthermore, because the support piece is positioned to slope downwards from the front to the rear of the housing case, with the base as the pivot point and the tip moving up and down, it is easier to remove and attach the handset compared to when the support piece is positioned in the opposite direction, that is, from the rear to the front of the housing case. Furthermore, since the tip of the support piece does not constantly come into contact with the top surface of the handset, it is possible to prevent scratches on the top of the handset.

[0011] Preferably, a projection is provided on the upper surface of the support base, and an engagement recess that can engage with the projection is formed on the lower surface of the earpiece of the handset. With the handset mounted in a predetermined position on the support base, the projection engages with the engagement recess to prevent the handset from shifting. The support piece has a horizontal portion at its tip, and is set so that the horizontal portion and the upper surface of the handset are facing each other at a distance smaller than the height of the projection.

[0012] With the above configuration, the horizontal tip of the support piece and the top surface of the handset are positioned at a distance smaller than the height of the projection that locks the handset in place, thus preventing the handset from coming off the projection. Furthermore, since the tip of the support piece and the top surface of the handset are always separated and do not come into contact, scratches on the top of the handset can be prevented.

[0013] Furthermore, preferably, the pressing means is a compression coil spring interposed between the horizontal portion of the tip of the support piece and the upper wall of the housing case. With this configuration, when the handset is lifted due to vibration or the like, the optimal force for the horizontal tip of the support piece to press against the top of the handset and prevent it from lifting up can be set relatively easily using the spring's repulsive force.

[0014] Also preferably, the support piece fixed to the upper wall of the housing case is provided with a receiving fitting that rotatably supports the base side. At least one of the support piece or the receiving fitting is formed of a ferromagnetic material. A magnet is attached to the base side of the support piece or the receiving fitting, and is configured such that a force in the direction of lowering the tip of the support piece acts due to the magnetic force of the magnet.

[0015] According to the above configuration, when removing the handset from the cradle or attaching it to the cradle, when the upper part of the handset hits the lower surface of the support piece and the support piece or the receiving fitting formed of a ferromagnetic material that was adsorbed by the magnet moves away from the magnet even slightly, the force pressing the upper part of the handset suddenly weakens. Therefore, the pressing force for preventing the handset from floating does not become a large resistance to the removal operation or attachment operation of the handset, and the removal operation and attachment operation of the handset can be made easier.

Effect of the Invention

[0016] According to the handset housing box of the emergency telephone device of the present invention, it is difficult for the handset to come off (fall off or shift), and the removal operation and attachment operation of the handset are easy. Further, even if a function for preventing the handset from coming off is provided, there is an effect that the upper part of the handset is not easily damaged.

Brief Description of the Drawings

[0017] [Figure 1] It is a front view showing an embodiment of an emergency telephone device according to the present invention. [Figure 2] (A) is a front view showing a configuration example of an emergency telephone unit constituting the emergency telephone device of the embodiment, and (B) is a cross-sectional side view taken along B-B in (A). [Figure 3] It is a perspective view showing the off-hook state of the telephone unit constituting the emergency telephone device of the embodiment. [Figure 4]This shows a first embodiment of an anti-lifting mechanism for a handset provided in a handset housing box that constitutes an emergency telephone device according to an embodiment. (A) is an enlarged side view of the main part showing the on-hook state of the handset, and (B) is an enlarged side view of the main part showing the off-hook state of the handset. [Figure 5] This shows the details of the components that make up the anti-lifting mechanism of the first embodiment. (A) is a perspective view showing the state where the components are combined, and (B) is an exploded perspective view of the components. [Figure 6] This shows a second embodiment of an anti-lifting mechanism for a handset provided in a handset housing box that constitutes an emergency telephone device according to an embodiment. (A) is an enlarged side view of the main part showing the on-hook state of the handset, and (B) is an enlarged side view of the main part showing the off-hook state of the handset. [Figure 7] This shows the details of the components that make up the anti-lifting mechanism of the second embodiment. (A) is a perspective view showing the state where the components are combined, and (B) is an exploded perspective view of the components. [Figure 8] (A) is an enlarged side view of the main part showing the gap between the support piece that constitutes the anti-lifting mechanism and the upper part of the handset in the emergency telephone device according to the embodiment, and (B) is an enlarged side view of the main part showing a modified example of the support piece.

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of this invention will be described with reference to the drawings. The emergency telephone device of this embodiment is installed in a monitoring center or the like at a corner of a building and has a function of making calls with slave units installed at various locations in the building. FIG. 1 shows an embodiment of the emergency telephone device. FIG. 1 is a front view of the emergency telephone device installed in a monitoring center or the like. As shown in FIG. 1, the emergency telephone device 10 of this embodiment includes a vertically long box-shaped metal housing 11 having an opening / closing door 11A on the front surface, and a main part of the emergency telephone device (hereinafter referred to as an emergency telephone unit) 12 fitted into a rectangular opening 11a formed in a part of the opening / closing door 11A (at a position slightly above the center in the figure).

[0019] The emergency telephone unit 12 comprises a metal front panel 21 that is flush with the front panel forming the opening / closing door 11A, a telephone unit 22 fitted into a vertically elongated rectangular opening 21a formed on the left side of the front panel 21, and an operation display unit 23 fitted into a roughly square opening 21b formed on the right side of the front panel 21. The telephone unit 22 is housed in a housing case 24 attached to the back surface of the front panel 21. The telephone unit 22 can be used as either a base unit or a handset of the emergency telephone system.

[0020] Figure 2 shows details of the emergency telephone unit 12. Of these, (A) is a front view of the emergency telephone unit 12, and (B) is a cross-sectional side view of (A) along BB. As shown in Figure 2(A), the operation display unit 23 includes an information display unit 32 consisting of a speaker 31 that emits an alarm sound when a fire alarm is triggered, and an LCD (liquid crystal display device) for displaying various information related to the fire alarm; and an input operation unit 33 having various function buttons such as a push button to stop the sound of the fire alarm, an information button to display fire details, abnormality details, etc. on the information display unit 32, and a test switch button for conducting tests.

[0021] On the other hand, as shown in Figure 2(B), the emergency telephone unit 12 comprises a base 25 consisting of a pedestal 25B fixed to the rear wall of the housing case 24 by screws and a support 25A integrally formed on the front surface of the pedestal 25B, a handset 26 attached to and placed on the front surface of the handset 25, and a coiled cord 27 with connectors at its ends connected to the handset 25 and the handset 26, respectively. As can be seen from Figure 2, the emergency telephone unit 12 of this embodiment is designed so that the handset 26 is mounted vertically on the handset 25.

[0022] In the emergency telephone unit 12 of this embodiment, although not particularly limited, the depth of the housing case 24 is set to be several millimeters greater than the height from the rear wall of the housing case 24 to the front of the handset 26 when the handset 26 is placed on the front of the receiving base 25 in an on-hook position. As a result, the front of the handset 26 is positioned behind the front panel 21 and does not protrude from the front of the housing 11. Furthermore, in the emergency telephone unit 12 of this embodiment, a trapezoidal guide member 28 is provided on the inside of the front edge wall 24c located at the lower front end of the housing case 24, and has an inclined surface that slopes downward at approximately 45 degrees toward the rear wall side of the housing case 24 when viewed from the side.

[0023] Furthermore, the connector at one end of the coiled cord 27 is located at approximately the midpoint of the support base 25, and the housing case 24 is set such that the distance from the position of the connector at one end to the bottom wall is approximately the same as the vertical length of the handset 26 (approximately 20 cm). Furthermore, the upper wall of the housing case 24 is set to be approximately the diameter of the coiled portion of the coiled cord 27 from the upper end of the handset side of the handset 26 placed on the support base 25, and the distance L0 from the intermediate height position of the guide member 28 inside the housing case 24 to the rear wall of the housing case 24 is set to be approximately twice the diameter of the coiled portion of the coiled cord 27 (for example, 15 mm) (for example, 30 mm).

[0024] As a result, sufficient space is formed between the inclined surface of the guide member 28 and the rear wall to the bottom wall of the storage case 24, allowing the coiled portion of the coiled cord 27 to be folded back and doubled up, and then stored lying on its side. The width of the storage case 24 (length in the left-right direction when viewed from the front) is set so that when the coiled portion of the coiled cord 27 is stored lying on its side and folded back once, the outside of the folded portion is just about to touch the inner surface of the side wall of the storage case 24. This allows the restoring force of the coiled portion of the coiled cord 27 to act to push up the handset 26, preventing it from coming off the base 25.

[0025] Furthermore, by providing the guide member 28, when the coiled cord 27 is stored in the storage space behind the guide member 28 with its coiled portion laid horizontally and folded back only once, the exterior appearance makes it so that the coiled cord 27 in the storage space is almost invisible from the front. As a result, the coiled cord 27 hanging from the handset 26 does not protrude beyond the front panel 21 of the emergency telephone unit 12, preventing the handset 26 from coming off the cradle 25 due to contact with a part of a moving person's body or an item being transported. It also prevents the coiled portion of the coiled cord from stretching due to its own weight.

[0026] Furthermore, in the emergency telephone unit 12 of this embodiment, as shown in Figure 3, a mountain-shaped projection 29 is provided on the upper surface of the bottom wall of the recess 25c on the upper side of the support portion 25A of the base 25, and although not shown, an engaging recess that can engage with the projection 29 is formed on the lower surface of the earpiece portion 26A of the handset 26. Because the handset 26 is mounted in such a way that the engaging recess of the earpiece portion 26A of the handset 26 is hooked onto this projection 29, even if relatively small vibrations are applied in a vertical telephone unit, it is possible to prevent the handset 26 from coming off or shifting from the base 25. Note that a switch for detecting the off-hook state may be provided in the engaging recess that can engage with the projection 29 on the lower surface of the earpiece portion 26A.

[0027] Furthermore, in the emergency telephone unit 12 of this embodiment, a floating prevention mechanism is provided above the handset 26 to prevent the handset 26 from floating up. Figure 4 shows a first embodiment of the anti-float mechanism 40, and Figure 6 shows a second embodiment of the anti-float mechanism 40. As shown in Figures 4 and 6, the anti-float mechanism 40 includes a support piece 41, one end of which is locked to the front edge of the upper wall of the housing case 24, which slopes downward toward the rear (left in the figures), and whose tip is positioned near the upper surface of the handset 26. The support piece 41 has horizontal sections at both ends and an inclined section in the middle. The angle of the inclined section of the support piece 41 with respect to the horizontal plane should be in the range of 30 to 50 degrees, with a preferred angle being 45 degrees.

[0028] The detailed configurations and effects of the anti-float mechanism 40 of the first embodiment shown in Figure 4 and the anti-float mechanism 40 of the second embodiment shown in Figure 6 will be described below. The anti-float mechanism 40 of the first embodiment shown in Figure 4 comprises a mounting bracket 42 fixed to the front edge of the upper wall of the housing case 24 in a horizontal position at a predetermined distance from the upper wall of the housing case 24 by a screw 43 that is screwed into a screw hole (female thread) formed in the cylindrical spacer portion 42a on its upper surface, and a compression coil spring (hereinafter referred to as a compression spring) 44 interposed between the horizontal portion of the tip side (lower end side) of the support piece 41 and the upper wall of the housing case 24. Alternatively, a screw hole (female thread) for screwing the screw 43 may be formed in a predetermined part of the upper wall of the housing case 24, and the screw 43 may be passed through the spacer portion 42a from below and screwed into the screw hole in the upper wall of the housing case 24. This allows the mounting bracket 42 to be easily fixed.

[0029] A through hole is formed in the horizontal portion of the base end (upper end) of the support piece 41, which loosely fits into the spacer portion 42a, and the support piece 41 is configured so that its tip can swing vertically with the base end as the pivot point. Furthermore, the horizontal portion of the tip of the support piece 41 and the upper surface of the handset 26 are configured to be separated by a predetermined distance δ, as shown in Figure 8(A). Note that the distance δ is set to a value smaller than the height of the projection 29 on the support base 25 side (for example, 3 mm). Furthermore, the tip of the support piece 41 may be curved, as shown in Figure 8(B). When the tip of the support piece 41 is curved, as shown in Figure 8(B), the area in contact with the support piece 41 when attaching or detaching the handset 26 can be reduced, thereby reducing the influence of the support piece 41 when attaching or detaching the handset 26.

[0030] With the above configuration, even if the handset 26 vibrates up and down due to an earthquake or the like, the tip of the support piece 41 will hit the upper surface of the handset 26, preventing it from floating above the height of the protrusion 29. Therefore, it is possible to prevent the handset 26 from coming off the base 25 or shifting from its proper position. Furthermore, a gap of δ is provided between the horizontal tip of the support piece 41 and the upper surface of the handset 26, so that the tip of the support piece 41 does not constantly come into contact with the upper surface of the handset 26, thereby preventing scratches on the upper surface of the handset 26. In addition, the anti-floating mechanism of this embodiment can be added to the handset housing box of an existing emergency telephone system.

[0031] During normal use, as shown in Figure 4(B), when the handset 26 is lifted, the compression spring 44 compresses, causing the tip of the support piece 41 to move upward, which in turn causes the support piece 41 to rotate. The upper part of the handset 26 moves along the lower surface of the inclined portion of the support piece 41, thereby removing the handset 26 from the base 25. Conversely, when placing the handset 26 on the base 25, the upper part of the handset 26 is brought into contact with the lower surface of the inclined portion of the support piece 41 and pushed forward. This guides the upper part of the handset 26 to the inclined portion of the support piece 41, moving it to a predetermined position where the engaging recess on the handset 26 side engages with the projection 29 on the base 25 side. The optimal pressing force of the compression spring 44 will be explained in detail later.

[0032] Figures 5(A) and 5(B) show the detailed structure of the components that make up the anti-float mechanism 40 shown in Figure 4. Of these, (A) is a perspective view showing the components assembled, and (B) is an exploded perspective view of the components. As shown in Figure 5(B), the upper surface of the receiving bracket 42 is provided with two cylindrical spacer portions 42a, and the horizontal portion on the base end side of the support piece 41 has two through holes 41a that are loosely fitted into the two spacer portions 42a, respectively.

[0033] On the other hand, a projection 42b is formed at the rear end of the receiving bracket 42, the base end of the support piece 41 is bent downward, and an opening 41b that is slightly larger than the projection 42b is formed at the corner, and the opening 41b at the base end of the support piece 41 engages with the projection 42b at the rear end of the receiving bracket 42, so that the support piece 41 is configured to swing up and down with this engagement as a pivot point. Furthermore, a vertical piece 41c is erected on the horizontal tip of the support piece 41 by cutting and bending, and a compression spring 44 is inserted into the vertical piece 41c, so that the vertical piece 41c functions as a guide post that vertically supports the compression spring 44. In addition, a washer 45 is interposed between the lower end of the compression spring 44 and the horizontal tip of the support piece 41. Furthermore, even when the tip of the support piece 41 is curved, as shown in Figure 8(B), a cut-out section may be provided on the tip of the support piece 41 in the same manner as in Figure 5(B) to form a guide post.

[0034] Next, the detailed configuration and effects of the anti-float mechanism 40 of the second embodiment shown in Figure 6 will be described. Figures 7(A) and 7(B) show the detailed structure of the components that make up the anti-float mechanism 40 shown in Figure 6. Of these, (A) is a perspective view showing the components assembled, and (B) is an exploded perspective view of the components.

[0035] The anti-float mechanism 40 shown in Figure 6 has a pivot-side structure similar to the anti-float mechanism of the first embodiment shown in Figure 4. It has a cylindrical spacer portion 42a on its upper surface and a receiving bracket 42 that is fixed to the front edge of the upper wall of the housing case 24 at a predetermined distance from the upper wall of the housing case 24 in a horizontal position by a screw 43 screwed into the spacer portion 42a. However, there is no compression spring 44 interposed between the horizontal portion on the tip side (lower end side) of the support piece 41 and the upper wall of the housing case 24. Instead, a magnet 46 is provided fixed to the lower surface of the horizontal portion on the base end side (upper end side) of the support piece 41. The support piece 41 is made of a ferromagnetic material that is attracted to the magnet. Instead of making the support piece 41 out of a ferromagnetic material, the receiving bracket 42 may be made out of a ferromagnetic material, or both the support piece 41 and the receiving bracket 42 may be made out of a ferromagnetic material.

[0036] Furthermore, as shown in Figure 7(B), a through hole 41a is formed in the horizontal portion of the base end (upper end) of the support piece 41, which loosely fits into the spacer portion 42a, and the support piece 41 is configured to swing vertically with the base end as the pivot point. In addition, a projection 42b is formed at the rear end of the receiving bracket 42, and the base end of the support piece 41 is bent downward. An opening 41b, which is slightly larger than the projection 42b, is formed below the lower surface of the base end of the bent support piece 41 by the thickness of the magnet 46, and the opening 41b at the base end of the support piece 41 engages with the projection 42b at the rear end of the receiving bracket 42, so that the support piece 41 is configured to swing vertically with this engagement as the pivot point.

[0037] Furthermore, the horizontal portion at the tip of the support piece 41 and the upper surface of the handset 26 are configured to be separated by a predetermined distance δ, as shown in Figure 8(A), similar to the anti-floating mechanism of the first embodiment. Note that the distance δ is set to a value smaller than the height (3 mm) of the projection 29 on the support base 25 side. Furthermore, the tip of the support piece 41 may be curved, as shown in Figure 8(B). When the tip of the support piece 41 is curved, as shown in Figure 8(B), the area in contact with the support piece 41 when attaching or detaching the handset 26 can be reduced, thereby reducing the influence of the support piece 41 when attaching or detaching the handset 26.

[0038] The float prevention mechanism 40 of the second embodiment utilizes the attractive force of the magnet 46 instead of the spring force of the compression spring 44 in the float prevention mechanism of the first embodiment, and its operation is almost the same, so a detailed explanation will be omitted. Next, we will describe the optimal pressing force of the support piece 41 due to the spring force of the compression spring 44 or the attractive force of the magnet 46.

[0039] The inventors investigated the conditions necessary for the support piece 41 to apply a pressing force to the upper part of the handset 26 so that the handset 26 does not detach from the receiver 25 even when an earthquake occurs. In general seismic design, if the design horizontal seismic intensity is set to 1, the design vertical seismic intensity Kv is 0.5. If the weight Z of the handset 26 is 150g, and the design vertical seismic intensity is Kv, and the coefficient for converting weight to Newtons is W(9.8), then the vertical seismic force Fv is given by the following equation Vertical seismic force Fv = Z × Kv × W ……(1) It is represented as follows.

[0040] As the design vertical seismic intensity Kv is 0.5 as described above, if the weight Z of the handset 26 is 150g (0.15kg), then from equation (1) above, Vertical seismic force Fv = 0.15 × 0.5 × 9.8 = 0.735 (N) This is the result. Here, if we set the safety margin to 1.3 and the pressing force required to prevent the handset 26 from lifting due to earthquake vibrations, F=0.735×1.3=0.9555≒1(N)≒100(gf) Therefore, it can be seen that the upward force applied to the handset 26 by vibrations associated with an earthquake can be suppressed in the first embodiment by setting the repulsive force of the compression spring 44 to approximately 100 (grams of weight) and applying the spring's pressing force to the handset 26 via the support piece 41.

[0041] On the other hand, in the second embodiment in which a magnet is used to prevent the handset 26 from coming off, if the total length of the support piece 41 is L1 and the distance from the pivot point to the magnet 46 is L2, then the attractive force Fm of the magnet 46 required to fix the base side of the support piece 41 so that a pressing force F of 1 (N) can be applied to the upper part of the handset 26 is given by the following equation, based on the principle of leverage: Fm = F × (L1 / L2) ……(2) It is expressed as follows. Here, assuming L1 is 43 mm and L2 is 13 mm, then from equation (2) above Fm=1×(43 / 13) =3.3(N) =330(gf) Therefore, the magnetic attraction force required to prevent the handset 26 from floating due to vibrations caused by an earthquake is 330 gf.

[0042] In the emergency telephone device of this embodiment, which employs the anti-floating mechanism 40 having the structure described above, by setting the repulsive force of the compression spring 44 and the attractive force of the magnet 46 as described above, even if the handset 26 vibrates up and down due to an earthquake or the like, the tip of the support piece 41 will hit the upper surface of the handset 26, preventing the handset 26 from floating up and preventing it from coming off the base 25 or shifting from its correct position.

[0043] Although the present invention has been described in detail above based on embodiments, the present invention is not limited to the above embodiments. For example, in the above embodiment, a protruding portion 42b is provided at the rear end of the receiving bracket 42, and an opening 41b that is slightly larger than the protruding portion 42b is formed at the base end of the support piece 41, and the protruding portion 42b of the receiving bracket 42 is engaged with the opening 41b at the base end of the support piece 41 so that the support piece 41 can swing. However, a pin shaft may be provided at the base end of the support piece 41, and a support piece having a shaft hole may be provided in the receiving bracket 42 so that the support piece 41 can swing.

[0044] Furthermore, in the above embodiment, a compression spring 44 or a magnet 46 is used to provide pressing force to the anti-float mechanism 40, but it is also possible to configure the support piece 41 to be formed as a leaf spring out of spring steel to provide pressing force. In this case as well, since the orientation of the support piece (leaf spring) 41 is the opposite of that of the conventional design, there is an advantage that it does not act as resistance when the handset 26 is attached to the base 25, but functions as a guiding member. Furthermore, although the above embodiment described an example in which the anti-float mechanism 40 is attached to the front edge (top plate) of the upper wall of the housing case 24, the present invention is not limited thereto. For example, the anti-float mechanism 40 described above can be attached to the upper part of the housing case 24, and may be fixed to one of the upper side walls of the housing case 24 or between the left and right side walls, or it may be attached to the front and upper surface plate of the housing case 24. Furthermore, in the above embodiment, a coiled cord 27 is provided to connect the handset 26 and the pedestal 25. However, if the handset uses wireless communication, the coiled cord 27 is unnecessary, and the housing case 24 only needs to house the handset and its pedestal.

[0045] Furthermore, the emergency telephone device of the present invention is not limited to being mounted on the front of a vertically elongated housing as in the embodiment shown in Figure 1, but may be mounted on the front panel of a housing that is shorter in height than the housing in the embodiment of Figure 1, or on part of a fire alarm receiver, or it may be mounted as a sub-unit on the front panel of an equipment housing box or emergency alarm system equipped with a fire alarm transmitter and a bell or speaker, or even the emergency telephone unit itself may be installed as a sub-unit on the wall of a building or the like. [Explanation of Symbols]

[0046] 10 Emergency telephone equipment 11 cabinets 11A Opening / Closing Door 12 Emergency telephone units 21 Front Panel 21a,21b opening 22 Telephone Unit 23 Operation display section 24 storage cases 24c leading edge wall 25 Support stand 25A Support part 25B Base 26 Handset 27 Coiled cord 28 Induction Member 29 Protrusion 40. Anti-float mechanism 41 Support Pieces 42 Mounting bracket 43 screws 44 Compression spring 45 Washers 46 Magnets

Claims

1. An emergency telephone system comprising a handset, a base on which at least a portion of the handset is placed in an upright position, and a box-shaped housing case for housing the handset and the base, The above-mentioned storage case has a support piece mounted on its upper wall so as to slope downward from the front to the rear of the storage case, with its base serving as a pivot point and its tip being able to move up and down, and a pressing means for pressing the support piece downward, The emergency telephone device is characterized in that the support piece is positioned opposite the handset at a distance such that its tip does not contact the upper surface of the handset, and the handset does not detach from the base even if it is lifted by a predetermined amount due to vibration.

2. A projection is provided on the upper surface of the receiving stand, and an engagement recess that can engage with the projection is formed on the lower surface of the earpiece of the handset. With the handset mounted in a predetermined position on the support base, the projection engages with the engagement recess to prevent the handset from shifting. The emergency telephone device according to claim 1, characterized in that the support piece has a horizontal portion at its tip, and the horizontal portion and the upper surface of the handset are positioned opposite each other at a distance smaller than the height of the projection.

3. The emergency telephone device according to claim 2, characterized in that the pressing means is a compression coil spring interposed between the horizontal portion of the tip of the support piece and the upper wall of the housing case.

4. The support piece is fixed to the upper wall of the aforementioned storage case and is equipped with a receiving bracket that allows the base to be rotatably supported. At least one of the support piece or the mounting bracket is made of a ferromagnetic material. The emergency telephone device according to claim 1 or 2, characterized in that a magnet is attached to the base side of the support piece or the receiving fitting, and the magnetic force of the magnet is configured to act in a direction that lowers the tip of the support piece.

Images