JP6581467B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device. More specifically, the present invention relates to an alarm device having a push button that can be pressed.

  In an alarm device such as a gas alarm device or a fire alarm device, a push button for operating a switch is usually provided on the front side of the casing. This push button is operated, for example, when stopping the alarm or checking the operation of the alarm device.

  The push button of such an alarm device is fixed by inserting an arm provided on the push button into the housing, for example (see, for example, Patent Document 1). Specifically, an opening for inserting an arm into the housing is formed, and the push button is attached to the housing by inserting the arm into the opening.

Japanese Patent No. 5295898

  On the other hand, when the push button is small, it is difficult for a user with a dark place or a blind person to operate, so there is a demand for a wide push button that can be easily operated even if the push button is roughly operated.

  However, when the push button is made wider to make it easier to operate the push button, the gap between the push button and the housing also tends to increase, and insects that have entered through the gap are inserted into the push button arm. May enter the inside of the housing from the opening. If insects enter the housing, the inside of the housing may be contaminated with insect dead bodies, and in some cases, electronic devices such as a short circuit inside the housing may be adversely affected.

  Therefore, in view of such a problem, an object of the present invention is to provide an alarm device capable of preventing insects from entering a housing through a gap between a push button and the housing.

  The alarm device of the present invention is an alarm device comprising a housing and a wide push button provided on the front side of the housing, wherein the push button is operated when pressed, An arm that extends from the main body toward the inside of the housing and is connected to the inside of the housing, and the housing is formed in a button attachment portion to which the main body portion is attached and the button attachment portion, An opening into which the arm is inserted, and the alarm device includes an insect repellent mechanism for preventing insects from entering the opening formed in the button attaching portion, and the insect repelling mechanism is provided in the button attaching portion. A housing side wall portion surrounding the opening, and a push button side wall portion provided on a back surface of the main body portion and surrounding a base end portion of the arm, wherein the push button side wall portion is provided on the housing side wall portion. Along the line And butterflies.

  The push button in the pressing direction is between the upper end of the housing side wall and the back surface of the main body, and between the lower end of the push button side wall and the button mounting portion. It is preferable that a predetermined gap that allows the pressing stroke is formed.

  The housing side wall includes a pair of wall bodies that are substantially parallel to the arm insertion direction, and the plate-shaped arm can be guided in the insertion direction between the pair of wall bodies. It is preferable.

  Further, the pressing portion is disposed in a pressing portion opening formed in a central portion in the longitudinal direction of the button mounting portion, and a housing side central wall portion surrounding the pressing portion opening is provided in the button mounting portion. It is preferable that a push button side central wall portion is provided on the back surface of the main body portion along the housing side central wall portion.

  Further, the floating prevention for preventing the push button from being lifted on one of the housing side wall and the push button side wall, or on either the housing side central wall or the push button side central wall. A protrusion is formed, and engages with the lifting prevention protrusion on either the casing side wall or the push button side wall, or on the other of the casing side central wall or the push button side central wall. It is preferable that a lifting prevention recess is formed.

  According to the present invention, it is possible to prevent insects from entering the housing from the gap between the push button and the housing.

It is a perspective view which shows the alarm device of one Embodiment of this invention. It is a front view of the alarm device of FIG. It is a side view of the alarm device of FIG. It is a perspective view which shows the state from which the pushbutton was removed in the front side housing | casing of the alarm device of FIG. It is the perspective view seen from the back side of a push button. It is the figure which looked at the front side housing | casing with which the push button was attached from the inner surface side of the housing | casing. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. (A) is the IX-IX sectional view taken on the line of FIG. 3, (b) is the elements on larger scale of (a). It is a schematic diagram which shows the pushbutton attached to the housing | casing and the arm of a pushbutton. (A) is the enlarged view which looked at the to-be-engaged part of the housing | casing from the inner surface side of the housing | casing, (b) is the enlarged view which looked at the to-be-engaged part shown to (a) in the insertion direction of an arm. is there. It is a figure which shows the state before the engaging part of an arm gets over the engaging claw of a to-be-engaged part. (A) is a schematic diagram which shows the positional relationship of the housing | casing side wall part before pressing a push button, and a push button side wall part, (b) is a housing | casing side wall part and push when a push button is pressed. It is a schematic diagram which shows the positional relationship with a button side wall part.

  Hereinafter, an alarm device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the alarm device A of the present embodiment includes a housing 1 that houses a substrate B (see FIGS. 7 and 8) on which a switch unit S is provided, and an outer periphery of the housing 1. And a wide push button 2 provided on the front F side of the housing 1.

  Alarm A detects an abnormality in the external environment and issues an alarm. As shown in FIGS. 1 and 2, the alarm device A of the present embodiment determines a change in the external environment based on a sensor unit (not shown) that detects a change in the external environment and an output of the sensor unit. The alarm unit 11 emits an alarm sound when an abnormality occurs, and the display unit 12 displays the power supply state of the alarm device A and the abnormal state with light from a light source (not shown) such as an LED. The light source for the sensor unit, the alarm unit 11 and the display unit 12 is operated by a voltage supplied from an external power source or a built-in battery.

  In this embodiment, the alarm device A is installed in a home kitchen or the like, and monitors the leakage of LP gas by a sensor unit such as a semiconductor sensor that detects LP gas. In the case of an alarm device for LP gas, since the specific gravity of LP gas is higher than that of air, it is installed at a height of about 30 cm from the floor side (the user's foot side) of the wall surface, for example, the floor surface. The alarm device of the present invention is not limited to the LP gas alarm device, and the installation position of the alarm device is not particularly limited. For example, the detection target of the alarm device may be other than LP gas, and a combustible gas sensor, city gas sensor, CO sensor, fire sensor, or the like may be used as the sensor unit. In the case of an alarm device other than LP gas, the alarm device may be installed on the upper side of the ceiling or wall surface. The sensor unit is not limited to a semiconductor sensor, and may be a known catalytic combustion type, electrochemical type, solid electrolyte type, or infrared type sensor, and is used in appropriate combination depending on the detection target. May be.

  The housing 1 accommodates various members provided in the alarm device A, such as the sensor unit, the speaker (not shown) of the alarm unit 11, the light source of the display unit 12, and the substrate B to which these are connected. In this embodiment, as shown in FIGS. 1 to 3, the housing 1 is formed in a substantially rectangular parallelepiped shape, and is attached to the wall surface so that the short side of the substantially rectangular parallelepiped shape is in the vertical direction. Although the material of the housing | casing 1 is not specifically limited, For example, it can form from a flame-retardant synthetic resin. The shape of the housing 1 is not limited to the shape shown in the figure, and may be other shapes such as a substantially cylindrical shape (a substantially circular shape when viewed from the front F side of the housing 1). In the present embodiment, as shown in FIGS. 1 and 3, the housing 1 is composed of a front housing 1A and a back housing 1B, and the front housing 1A and the back housing 1B. Are joined together to form the housing 1. In the present embodiment, as shown in FIGS. 1 to 3, the front housing 1 </ b> A is inclined such that the upper side when the housing 1 is installed becomes lower toward the front F ( When the casing 1 is attached to the upper side of the wall surface, the lower side of the casing 1 is inclined so that the height increases toward the front F). Therefore, it is easy for the user to check the light from the display unit 12.

  The push button 2 provided in the housing 1 is pressed, for example, when the alarm is temporarily stopped or when the operation of the alarm device A is checked. The material of the push button 2 is not particularly limited as in the case 1. For example, the push button 2 can be made of a flame-retardant synthetic resin. As shown in FIGS. 1 to 3, the push button 2 is provided wide on the front F side of the housing 1 along the outer periphery of the housing 1. In the present specification, the term “wide” means, for example, in the case of the substantially rectangular parallelepiped casing 1 over the entire length of one side of the four sides of the casing 1 or the large length of one side. Part (for example, 60% or more of the length of one side, preferably 80% or more). In the case of a substantially circular casing, the central angle of the arc part in the outer peripheral part of the push button is , 60 to 180 °, preferably about 90 ° to 180 °. In the present embodiment, the push button 2 is formed to be wide (elongated) in the height direction (vertical direction in FIG. 2) when the housing 1 is installed. It may be formed wide in the horizontal direction (left-right direction in FIG. 2) at the time of installation. As described above, since the push button 2 is formed to be wide along the outer periphery of the housing 1, the push button 2 can be operated by an approximate operation even in a place where visibility is poor such as a dark place. The pressing operation becomes easier. In the following, the direction in which the push button 2 is elongated is referred to as a longitudinal direction L of the push button 2 (or a main body portion 21 described later) (see FIGS. 1 to 3).

  As shown in FIGS. 4 and 5, the push button 2 includes a main body 21 that is operated when pressed, and first and second arms 22 a and 22 b (hereinafter referred to as first and second arms) that extend toward the inside of the housing 1. The second arm may be simply referred to as an arm 22), and an engaging portion 23 provided in each of the first and second arms 22a and 22b. On the other hand, the housing 1 to which the push button 2 is attached includes an opening 13 (see FIG. 4) into which the first and second arms 22a and 22b are inserted, and an engaging portion 23 provided inside the housing 1. First and second engaged portions 14a, 14b (see FIGS. 6 and 7). Hereinafter, the first and second engaged portions 14a, 14b are simply combined with the engaged portion 14. And a pressing portion 15 (see FIG. 4) that is pressed by the main body portion 21 and is configured to operate the switch portion S.

  The main body 21 is a wide pressing portion that is operated by the user among the push buttons 2. The shape of the main body portion 21 is not particularly limited as long as the main body portion 21 is formed wide along the outer periphery of the housing 1. In the present embodiment, the main body portion 21 is illustrated in FIGS. 2, 4, and 5. As seen from the front F side, the long side and the short side extending along the longitudinal direction L substantially parallel to each other, and the long side and the short side are rounded at both longitudinal ends of the main body 21. It has a shape having a pair of connected curved portions. In the present embodiment, as shown in FIGS. 3 to 5, the portion of the main body 21 along the outer periphery of the housing 1 is pressed from the flat portion on the front side of the main body 21 by the pressing direction P (FIG. 1). And the edge part 21a curved in the shape of a bank toward the pressing side in FIG. 3) is formed. Therefore, in this embodiment, a space is formed inside the edge portion 21a of the back surface 21d (see FIG. 5) of the main body portion 21 as shown in FIG. 5, and the space inside the edge portion 21a is formed in this space. Are provided with an insect repellent mechanism, which will be described later, and a contact body 21b (in the present embodiment, two contact bodies 21b arranged along the longitudinal direction L) that can contact the pressing portion 15. Moreover, the edge part 21a is not formed in the outer periphery of the main-body part 21 in the long side side (part facing the level | step-difference part 17b mentioned later), As FIG. 5 shows from a long side side. The first and second arms 22a and 22b and a protrusion 24 that engages with an opening edge of the pressing portion opening 16 described later extend.

  Further, in the present embodiment, the housing 1 has a button attachment portion 17 to which the main body portion 21 of the push button 2 is attached, as shown in FIG. 4, and the main body portion 21 is attached to the button attachment portion 17. . As shown in FIG. 4, the button mounting portion 17 is substantially parallel to the front surface F of the housing 1, and has a mounting surface 17 a formed so as to be recessed in the pressing direction P from the front surface F, and the front surface F and the mounting surface 17 a. The step part 17b between the two is included. The mounting surface 17a is formed to face the back surface 21d of the main body 21. In the present embodiment, as shown in FIG. 4, the pressing surface 15 and an insect proof mechanism described later are provided on the mounting surface 17 a. Further, a pressing portion opening 16 for providing the pressing portion 15 is formed in the mounting surface 17a. In this embodiment, as shown in FIG. 4, the pressing portion 15 is arranged in the longitudinal direction L of the mounting surface 17a. It arrange | positions in the opening 16 for press parts formed in the center part. As shown in FIGS. 4 and 9A, the pressing portion opening 16 is formed so as to penetrate the attachment surface 17 a in the pressing direction P and communicates with the inside of the housing 1. Inside the pressing portion opening 16, the pressing portion 15 is disposed slightly apart from the opening edge of the pressing portion opening 16.

  In the present embodiment, the pressing portion 15 is configured to operate the switch portion S provided on the substrate B when the main body portion 21 is pressed. As shown in FIGS. It is provided between the part 21 (contact body 21b) and the switch part S. More specifically, as shown in FIGS. 4, 7, and 8, the pressing portion 15 extends from the stepped portion 17 b of the housing 1 toward the pressing side in the pressing direction P and is then substantially U-shaped. The leaf spring portion 151 curved in a straight line, the contacted portion 152 that can be brought into contact with the contact body 21b of the main body portion 21 and the pressed portion in the pressing direction P from the contacted portion 152 are provided. And a switch operation portion 153 extending toward the switch portion S. As a result, when the main body portion 21 is pressed, the contacted portion 152 is pressed from the contact body 21b, the leaf spring portion 151 is elastically deformed, and the switch operation portion 153 presses the switch portion S to push it. The operation by the button 2 is performed. In the present embodiment, as shown in FIG. 4 and FIG. 9A, two contacted portions 152 are provided along the longitudinal direction L as in the case of the contact body 21 b. Two leaf spring portions 151 are formed corresponding to each of the two contacted portions 152a and 152b. Therefore, the pressing force is easily transmitted to the switch operation unit 153 by pressing one of the two contacted portions 152 from one of the two contact bodies 21b. In the present embodiment, the two abutted portions 152a and 152b are connected in the longitudinal direction L by a plate-like body 154 (see FIGS. 4 and 9A), and the two abutted portions 152a. , 152b protrudes from the plate-like body 154 at an intermediate portion in the longitudinal direction L (see FIG. 6).

  In the present embodiment, the stepped portion 17b is a portion formed perpendicular to the front surface F and the mounting surface 17a, as shown in FIG. In the present embodiment, the opening 13 is formed in the stepped portion 17b at an interval corresponding to the interval between the first and second arms 22a and 22b. Note that the position of the opening 13 is not particularly limited as long as the arm 22 can be inserted into the housing 1, and the opening 13 may be formed in another part (for example, the mounting surface 17 a) of the button mounting part 17. . Moreover, in this embodiment, the opening 16 for press parts formed in the attachment surface 17a is extended to the level | step-difference part 17b, as FIG. 4 shows, and the protrusion 24 (refer FIG. 5) of the main-body part 21 is. Engage and more securely attach the push button 2 to the housing 1.

  As shown in FIGS. 4 and 5, the arm 22 to be inserted into the opening 13 of the housing 1 has a pressing direction P and a longitudinal direction L of the push button 2 from both ends in the longitudinal direction L of the main body 21. It extends toward the inside of the housing 1 in a substantially vertical direction (hereinafter referred to as the insertion direction I of the arm 22). An engagement portion 23 is provided on the free end side (near the free end) of the arm 22, and the engagement portion 23 is configured to engage with the engaged portion 14 inside the housing 1. When the engaging portion 23 and the engaged portion 14 are engaged, the arm 22 is prevented from being detached, that is, the push button 2 is detached from the housing 1. And in this embodiment, since the push button 2 can be fixed to the housing | casing 1 not by welding but by engagement, welding equipment becomes unnecessary. For this reason, mistakes such as welding mistakes are unlikely to occur when the push button 2 is attached to the housing 1, and thus manufacturing costs can be reduced.

  When the engaging portion 23 of the arm 22 is engaged and attached to the engaged portion 14, the switch portion S can be operated by pressing the main body portion 21. More specifically, when the main body portion 21 is pressed, the free end side of the arm 22 is supported by the engaged portion 14, and the arm 22 bends with a place supported by the engaged portion 14 as a fulcrum, and the arm 22. Can be swung. The material of the arm 22 is not particularly limited, but is formed of, for example, a flexible resin material.

  Here, in this embodiment, as shown in FIG. 4 and FIG. 6, the pressing portion 15 includes first and second arms 22 a and 22 b that are engaged with each other in the longitudinal direction L of the main body portion 21. It is located between the second engaged parts 14a and 14b. Therefore, for example, as shown in the schematic diagram of FIG. 10, when one end portion (point X in FIG. 10) in the longitudinal direction L of the main body portion 21 is pressed, for example, the first arm 22a is mainly used. However, the portion connected to the first engaged portion 14a is bent as a fulcrum (indicated by reference numeral S1 in FIG. 10) and swings along the pressing direction P. On the other hand, for example, when the other end portion (point Y in FIG. 10) in the longitudinal direction L of the main body portion 21 is pressed, the second arm 22b is mainly connected to the second engaged portion 14b. The bent portion is bent as a fulcrum (indicated by reference numeral S2 in FIG. 10) and swings along the pressing direction P. For example, when the central portion (point Z in FIG. 10) in the longitudinal direction L of the main body portion 21 is pressed, both the first and second arms 22a and 22b are bent with the fulcrums S1 and S2 as fulcrums. Swing. Therefore, when the end portion in the longitudinal direction L of the main body portion 21 is pressed, one of the first and second arms 22a and 22b is mainly bent, and the pressing portion 15 is in the longitudinal direction L, and the first and first arms 2 is located between the two arms 22a and 22b (between the first and second engaged portions 14a and 14b), so that even if the end portion of the wide main body portion 21 is pushed, the switch portion S is surely provided. The operation of the main body portion 21 is transmitted to. Therefore, since the switch portion S can be operated even when an arbitrary place of the wide push button 2 is pressed, the structure of the present embodiment is a structure very suitable for the wide push button 2.

  In the present embodiment, in the installation state of the alarm device A, the side of the push button 2 that is closer to the user, or the side that is easy for the user to operate, is the side that is far from the user, or is operated by the user. It is configured to be easier to press than the difficult side. For example, when the alarm device A is installed below the wall surface like an LP gas alarm device, the upper portion of the push button 2 is configured to be easier to press than the lower portion. . More specifically, in this embodiment, as shown in FIG. 1 and FIG. 3, as it goes to one end portion in the longitudinal direction L of the main body portion 21, An inclined tapered surface 21c is formed so that the distance from the back surface of the body 1 approaches. As described above, since the tapered surface 21c is formed, when the alarm device A is installed near the foot of the wall, such as an alarm device for LP gas, the user pushes the push button 2 from diagonally above. It becomes easier to press when pressing. That is, when the user presses the main body 21 with a finger or the like, the user does not press the main body 21 near the foot in a direction perpendicular to the wall surface on which the alarm device A is installed, but is inclined upward with respect to the tapered surface 21c. , The component force of the pressing force applied to the tapered surface 21c acts in the pressing direction P. Therefore, even when the alarm device A is installed in the vicinity of the feet or at a high position on the wall surface, the pressing operation of the push button 2 becomes easy. In addition, although the inclination angle of the taper surface 21c is not specifically limited, For example, it is preferable that the angle with respect to the front F of the housing | casing 1 is about 120-150 degrees.

  Further, the shape of the first and second arms 22a and 22b is not particularly limited, but in the present embodiment, as shown in FIGS. 4 and 5, the first and second arms 22a and 22b are plate-shaped. Is formed. More specifically, as shown in FIG. 4, the flat surfaces of the plate-like first and second arms 22 a and 22 b extend from the main body portion 21 so as to be substantially parallel to the front surface F of the housing 1. ing.

  In the present embodiment, the engaging portions 23 formed on the first and second arms 22a and 22b are respectively formed on the plate-like first and second arms 22a and 22b as shown in FIG. It protrudes from one surface. More specifically, the engaging portion 23 protrudes in a substantially U shape from the side edge of the surface of the first and second arms 22a and 22b having a substantially rectangular plate shape facing the back side of the housing 1. . An engaging claw C of an engaged portion 14 to be described later (see FIG. 11A) is formed in a hole portion of the engaging portion 23 formed by forming the engaging portion 23 so as to protrude in a substantially U shape. Engage. In the present embodiment, as shown in FIG. 4 and FIG. 6, in order to facilitate insertion of the arm 22 having the engagement portion 23 protruding in a substantially U shape into the opening 13 of the housing 1, A guide hole 18 communicating with the opening 13 formed in the stepped portion 17b is formed. The guide hole 18 is formed in the mounting surface 17 a along the insertion direction I of the arm 22 and communicates with the opening 13. The guide hole 18 has a width that allows the engagement portion 23 to be inserted, and the arm 22 is easily opened by sliding the arm 22 in the insertion direction I in a state where the engagement portion 23 is in the guide hole 18. It can insert stably toward the part 13, and the assembly | attachment property of the alarm device A improves.

  The shape of the engaged portion 14 with which the engaging portion 23 engages is not particularly limited as long as the engaging portion 23 can be engaged, but in this embodiment, FIGS. 8, 11A and 11B. As shown in FIG. 2, the first and second engaged portions 14a and 14b each have a pair of clamping portions H1 and H2 that clamp the plate-like first and second arms 22a and 22b in the pressing direction P. And a projecting portion that protrudes from the inner surface of the housing 1 so as to be able to contact the side surfaces of the first and second arms 22a and 22b and restricts the movement of the first and second arms 22a and 22b in the longitudinal direction L. E. The pair of sandwiching portions H <b> 1 and H <b> 2 holds the plate-like arm 22 and allows the arm 22 to bend when the main body portion 21 is pressed by either or both of them. Further, since the standing portion E is provided so as to be in contact with the side surfaces of the first and second arms 22 a and 22 b, the push button 2 is attached to the housing 1 after the arm 22 is attached to the housing 1. On the other hand, movement in the longitudinal direction L is restricted. More specifically, the first arm 22a is moved in one of the longitudinal directions L (moved upward in FIG. 8) by the standing portion E of the first engaged portion 14a. The second arm 22b is restricted from moving to the other of the longitudinal directions L (downward in FIG. 8) by the standing portion E of the second engaged portion 14b. . Accordingly, the play of the push button 2 in the longitudinal direction L is eliminated, and the operation of the push button 2 in the pressing direction P is stabilized.

  In the present embodiment, as shown in FIGS. 8, 11 (a) and 11 (b), the pair of sandwiching portions H 1 and H 2 extend substantially parallel to each other along the longitudinal direction L, and the standing portion E However, it is formed so that a pair of clamping parts H1 and H2 may be connected in the pressing direction P. As shown in FIG. 8 and FIG. 11 (b), each of the first and second engaged portions 14a and 14b is formed by a pair of sandwiching portions H1 and H2 and a standing portion E, so that The cross section perpendicular to the insertion direction I of the arms 22a and 22b is formed in a substantially U shape. Thus, the plate-like arm 22 is inserted inside the engaged portion 14 having a substantially U-shaped cross section formed by the pair of sandwiching portions H1, H2 and the standing portion E. Also, as shown in FIGS. 11A, 11B, and 12, an engagement claw C is formed at the free end of one of the pair of sandwiching portions H1 and H2 (the sandwiching portion H1 in this embodiment). When the engaging portion 23 is inserted into the first and second arms 22a and 22b, the engaging portion 23 gets over the engaging claw C in the insertion direction I of the first and second arms 22a and 22b. Engage. With this configuration, the plate-like arm 22 is inserted into the engaged portion 14 by being inserted from the opening 13 and is sandwiched between the sandwiching portions H1 and H2. Then, the engaging claw C of the engaged portion 14 engages with the engaging portion 23 (see FIG. 11A). Therefore, the push button 2 can be easily assembled to the housing 1 and the arm 22 (push button 2) can be prevented from coming off.

  Further, in this embodiment, as shown in FIGS. 11A and 11B, the engaging claw C is formed on the end surface of the free end of the holding portion H1, and the engaging portion 23 is shown in FIG. As described above, the arm 22 is provided at a position slightly shifted from the free end toward the main body 21. Therefore, as shown in FIG. 12, the engagement between the engagement portion 23 and the engagement claw C starts after the tip of the arm 22 slightly enters the inside of the substantially U-shaped engaged portion 14. Therefore, the arm 22 is pushed in the insertion direction I while the tip of the arm 22 is held between the holding portions H1 and H2 and the arm 22 is stable in the pressing direction P. In addition, since the arm 22 is stabilized in the longitudinal direction L by the standing portion E, the insertion when the engaging portion 23 of the arm 22 is engaged with the engaging claw C is stable, and the first and second arms 22a. , 22b can be simultaneously engaged, and the push button 2 can be attached to the housing 1 reliably and easily.

  Next, the insect repellent mechanism will be described. In the alarm device A of the present embodiment, as described above, the arm 22 extends toward the inside of the housing 1 and is connected to the inside of the housing 1, and the housing 1 (the stepped portion 17 b and / or the mounting portion of the button mounting portion 17). The surface 17a) has an opening 13 into which the arm 22 is inserted. Further, in the case of the wide push button 2 of the alarm device A of the present embodiment, since the pressing stroke in the pressing direction P tends to be long, the gap between the push button 2 and the housing 1 (button mounting portion 17). Tend to be larger. If this gap is large, insects may enter the housing 1 from the outside, and may adversely affect the electronic device, for example, a short circuit in the housing 1. When an insect repellent mechanism described below is provided, insects are prevented from entering through such a gap between the push button 2 and the housing 1. Hereinafter, the insect repellent mechanism will be described.

  As shown in FIGS. 4 and 5, the insect repellent mechanism is provided on the button attachment portion 17 (in this embodiment, the attachment surface 17 a), and includes a housing side wall portion 19 that surrounds the opening portion 13 and a back surface 21 d of the main body portion 21. And a push button side wall 25 surrounding the base end of the arm 22.

  In the present embodiment, as shown in FIG. 4, the housing side wall portion 19 is formed around the opening 13 formed in the stepped portion 17b (and / or the mounting surface 17a), and is substantially perpendicular to the mounting surface 17a. A wall that rises in the direction. The case side wall portion 19 is configured to surround the entire opening 13 together with the push button side wall portion 25 when the push button 2 is attached to the case 1. Therefore, the housing side wall 19 only needs to cover at least a part of the opening 13.

  In the present embodiment, the housing side wall portion 19 includes a pair of wall bodies 19a and 19b substantially parallel to the insertion direction I of the arm 22, as shown in FIGS. 9 (a) and 9 (b). Therefore, the arm 22 formed in a plate shape can be guided in the insertion direction I between the pair of wall bodies 19a and 19b, and the insertion of the arm 22 is facilitated. In the present embodiment, the housing side wall portion 19 is disposed so as to connect a pair of substantially parallel wall bodies 19a and 19b and a pair of wall bodies 19a and 19b, with respect to the pair of wall bodies 19a and 19b. Although it has the wall body 19c extended in the longitudinal direction L substantially perpendicularly, the shape of the housing | casing side wall part 19 is not limited to the shape to show in figure.

  In the present embodiment, as shown in FIG. 5, the push button side wall portion 25 surrounds the proximal end portion of the arm 22, and after the arm 22 is inserted into the opening portion 13, the opening portion 13 together with the housing side wall portion 19. Surrounds the whole. Specifically, as shown in FIG. 13A, the housing side wall 19 and the push button side wall 25 overlap in the pressing direction P when the push button 2 is attached to the housing 1. It is formed at such a height. As shown in FIGS. 9A and 9B, the push button side wall portion 25 is provided adjacent to the housing side wall portion 19. Here, “along the case side wall 19” means that the push button side wall 25 has a shape corresponding to the case side wall 19. For example, when the housing side wall 19 is substantially U-shaped when viewed from the front F of the housing 1 as shown in FIG. When the housing side wall 19 has a substantially C-shape that is slightly larger (or smaller) than 19 and has a curved substantially C-shape, the push button side wall 25 is slightly larger than the housing side wall 19 ( (Or small) can be substantially C-shaped. In addition, “provided adjacent” means that the distance between the walls between the push button side wall portion 25 and the housing side wall portion 19 is within a predetermined interval that can prevent insects from entering. Good. Although the predetermined space | interval which prevents an insect invading is not specifically limited, For example, it can be 0.3 mm or less. Note that the push button side wall portion 25 and the housing side wall portion 19 may be configured to slide (without a gap) as long as the pressing operation of the main body portion 21 is possible.

  As described above, the push button side wall portion 25 is provided adjacently along the housing side wall portion 19 so that a gap (see FIG. 5) is provided between the main body portion 21 of the wide push button 2 and the housing 1. 3), it is possible to prevent insects from entering the housing 1 through the opening 13 for inserting the arm 22. More specifically, in order for insects to enter the inside of the housing 1 from the outside of the alarm device A, it is necessary to advance beyond both the push button side wall portion 25 and the housing side wall portion 19 in FIG. There is. However, as shown in FIGS. 9A and 9B, the push button side wall portion 25 surrounds the periphery of the opening 13, and as shown in FIG. Since the case side wall 19 is provided adjacent to the case, the insect cannot enter the space surrounded by the push button side wall 25 and the case side wall 19. Therefore, the insect cannot reach the opening 13 and can prevent the insect from entering the housing 1.

  Further, in the present embodiment, as shown in FIGS. 13A and 13B, between the upper end (free end) of the housing side wall portion 19 and the back surface 21 d of the main body portion 21, and the push button side wall. Between the lower end (free end) of the part 25 and the attachment surface 17a, a predetermined gap that allows the pressing stroke of the push button 2 in the pressing direction P is formed. Thereby, even when the wall portion is provided for insect protection, the pressing stroke of the main body portion 21 is ensured, and the casing side wall portion 19 and the push button side wall portion 25 are relatively long pressed by the wide push button 2. There is no hindrance to the stroke. The “predetermined gap allowing the pressing stroke” is not particularly limited because it varies depending on the size of the push button 2 or a desired stroke, but may be, for example, 1 to 2 mm.

  Further, in the present embodiment, as shown in FIGS. 4, 5, and 9 (a), the attachment surface 17 a is provided with a housing-side central wall portion 19 d surrounding the pressing portion opening 16. A push button side central wall portion 26 is provided on the back surface 21d along the housing side central wall portion 19d. Thereby, even when the pressing portion opening 16 is provided to allow the inside and outside of the housing 1 to communicate with each other when the pressing portion 15 is provided, insects can be prevented from entering through the pressing portion opening 16. be able to.

  Further, in the present embodiment, as shown in FIGS. 4, 5 and 9A, the push button side central wall portion 26 is provided with a lift prevention projection PR for preventing the push button 2 from being lifted. The body-side central wall portion 19d is formed with a lifting prevention recess R that engages with the lifting prevention projection PR. As a result, when the push button 2 is attached to the housing 1, the lifting prevention protrusion PR is engaged with the lifting prevention recess R (see FIG. 9A), and the push button 2 is moved to the pressing side in the pressing direction P. Is restricted from moving in the opposite direction. Therefore, the push button 2 can be prevented from being lifted, the arm 22 can be prevented from being broken due to the push button 2 being lifted, the push button 2 can be prevented from coming off, and the like. .

  Next, the assembly of the alarm device A of the present embodiment and the operational effects of the present embodiment will be described more specifically. The following description is merely an example, and the present invention is not limited to the following description.

  First, in order to attach the push button 2 to the housing 1, the arm 22 is inserted toward the opening 13 from the state shown in FIG. 4. At this time, first, the engaging portion 23 provided on the arm 22 is inserted into the guide hole 18 provided continuously with the opening 13. At this time, the plate-like arm 22 enters between the pair of wall bodies 19 a and 19 b of the housing side wall portion 19. Accordingly, the engaging portion 23 is guided by the guide hole 18, and the plate-like arm 22 is guided by the pair of wall bodies 19 a and 19 b, so that the arm 22 can be stably inserted into the opening portion 13. . Further, since the push button side wall 25 is provided along the housing side wall 19 when the arm 22 is inserted into the opening 13, the push button side wall 25 and the housing side wall 19 also function as a guide. Thus, the arm 22 can be more stably inserted.

  When the arm 22 is inserted into the opening 13 as it is, the engaging claw C of the engaged portion 14 and the engaging portion 23 come into contact with each other as shown in FIG. The engaging claw C is formed in a tapered shape so as to gradually increase as it advances in the inserting direction I, and the front side (left side in FIG. 12) of the engaging portion 23 in the inserting direction I is also formed in a tapered shape. . Thereby, the engaging part 23 is easy to get over the engaging claw C. When the arm 22 is inserted as it is, the arm 23 is bent and the engaging portion 23 gets over the engaging claw C, and as shown in FIGS. 11 (a) and 11 (b), inside the engaging portion 23. The engaging claw C is engaged.

  At this time, as shown in FIG. 12, the free end of the arm 23 is held between the holding portions H <b> 1 and H <b> 2 of the engaged portion 14, so that the arm 23 is restricted from moving in the pressing direction P, The arm 23 is inserted stably. In addition, since both the first and second arms 22a and 22b are guided along the insertion direction I and are restricted from moving in the pressing direction P as described above, the engagement between the pair of arms 22a and 22b is restricted. Engagement between the joint portion 23 and the engaging claws C of the first and second engaged portions 14a and 14b is easily performed simultaneously. Therefore, only one of the engaging portions 23 of the pair of arms 22 is engaged first, and the other engaging portion 23 is not easily engaged. It is possible to prevent the engaging portion 23 and the engaging claw C from being damaged by forcibly pushing in the other engaging portion 23 that is engaged only after the portion 23 is engaged.

  Further, when the engaging portion 23 and the engaging claw C are engaged, the lifting prevention protrusion PR provided on the push button side central wall portion 26 has a housing side center as shown in FIG. It engages with a lifting prevention recess R provided in the wall 19d. This restricts the main body 21 of the push button 2 from moving in the direction of lifting from the mounting surface 17a, and prevents the arm 22 from being damaged by moving in the direction of lifting of the main body 21.

  When the engagement between the engaging portion 23 and the engaged portion 14 is completed, the movement of the side portion of the arm 22 in the longitudinal direction L is restricted by the standing portion E as shown in FIG. . Therefore, the play of the arm 22 in the longitudinal direction L is eliminated, and the operation of the push button 2 in the pressing direction P is stabilized. When the engagement between the engaging portion 23 and the engaged portion 14 is completed, as shown in FIGS. 9A, 13A and 13B, the push button side wall portion 25 and the housing The body side wall 19 is disposed adjacent to the opening 13 and the opening 13 into which the arm 22 is inserted is surrounded by the push button side wall 25 and the housing side wall 19. Similarly, the push button side central wall portion 26 and the housing side central wall portion 19d are disposed adjacent to each other, and the pressing portion opening 16 is surrounded by the push button side central wall portion 26 and the housing side central wall portion 19d. . Therefore, the insect intrusion route from the outside of the housing 1 to the inside of the housing 1 is blocked, and the insect can be prevented from entering.

  The engagement between the engaging portion 23 of the arm 22 and the engaged portion 14 of the housing 1 may be performed before the front housing 1A and the back housing 1B are joined. It can also be carried out after joining the front housing 1A and the back housing 1B. Therefore, the degree of freedom of assembly work is increased.

  When the attachment of the push button 2 to the housing 1 is completed, the push button 2 can be operated. As described above, the switch portion S can be operated by pressing not only the center portion in the longitudinal direction L of the main body portion 21 of the push button 2 but also both end portions in the longitudinal direction L. Specifically, as shown in FIG. 10, when the point X on the one end side of the main body 21 is pressed, the first arm 22a is mainly bent and the second arm 22b is not bent so much. Since the portion 15 is provided between the first arm 22a and the second arm 22b in the longitudinal direction L, the pressing portion 15 is pressed by the bending of the first arm 22a. More specifically, the pressing portion 15 includes a first contacted portion 152a provided on the first arm 22a side in the longitudinal direction L and a second contacted portion provided on the second arm 22b side. And a contact portion 152b. Therefore, when the part of the point X is pressed, the first arm 22a is mainly bent, the first contacted part 152a is mainly pressed, and the entire pressing part 15 is displaced via the leaf spring part 151. Let Thereby, even if the end portions such as the point X and the point Y of the main body portion 21 are pressed, the force in the pressing direction P is reliably transmitted to the pressing portion 15, and the switch portion S is securely connected via the switch operation portion 153. Can be operated.

  Further, when the main body portion 21 is pressed, as shown in FIGS. 13A and 13B, between the upper end (free end) of the housing side wall portion 19 and the back surface 21 d of the main body portion 21, and Between the lower end (free end) of the push button side wall portion 25 and the mounting surface 17a, a predetermined gap that allows the push stroke of the push button 2 in the push direction P is formed. Thereby, even when the wall portion is provided for insect protection, the pressing stroke of the main body portion 21 is ensured, and the casing side wall portion 19 and the push button side wall portion 25 are relatively long pressed by the wide push button 2. There is no hindrance to the stroke, and insects can be prevented from entering even during the pressing operation of the main body 21.

  In this embodiment, as shown in FIG. 1 and FIG. 3, since the tapered surface 21 c is formed at the end of the main body portion 21, when the user presses the main body portion 21 with a finger or the like, When the main body portion 21 is pressed from the diagonally upward with respect to the tapered surface 21c, the component force of the pressing force applied to the tapered surface 21c acts in the pressing direction P. Therefore, even when the alarm device A is installed in the vicinity of the feet or at a high position on the wall surface, the pressing operation of the push button 2 becomes easy. Further, in the present embodiment, as shown in FIG. 5, the push button side wall 25 is provided on the back surface 21 d side of the main body 21, and the push button side wall 25 is the end of the back surface 21 d of the main body 21. It is provided on the part side. Therefore, the push button side wall portion 25 also functions as a reinforcing rib of the main body portion 21 (see FIG. 9B). Therefore, for example, when the portion of the tapered surface 21c is pressed, even if the portion of the tapered surface 21c of the main body portion 21 is slightly elastically deformed, the entire main body portion 21 does not deform so much, and when the tapered surface 21c is pressed. The force is transmitted to the first arm 22a and can be bent without any problem. In this case, the user can obtain not only ease of operation when pressing the tapered surface 21c but also a click feeling due to elastic deformation of the tapered surface 21c. Even if the tapered surface 21c is easily elastically deformed in order to obtain a click feeling, the push operation can be transmitted without any problem because the push button side wall portion 25 functions as a reinforcing rib. Therefore, even if a certain amount of flexible resin material is used for the main body portion 21, it is possible to achieve both a click feeling during pressing and a reliable pressing operation. In the present embodiment, the taper surface 21c is formed on the main body portion 21 of the push button 2 and the push button side wall portion 25 functions as a reinforcing rib, but the side on which the push button 2 is easy to operate (this embodiment) The configuration for facilitating the pressing operation on the upper side of the push button 2 in the form is not limited to this embodiment. For example, as a modification, one end side of the push button 2 on the side closer to the user or the side that is easy for the user to operate is the push button 2 on the side far from the user or the side that is difficult for the user to operate. The push button side wall portion 25 may be arranged so that the pressing operation is easier than the other end side. The arrangement of the push button side wall 25 is not particularly limited. For example, the reinforcement region of the push button side wall 25 on one end side of the push button 2 is relatively wider than the other end side of the push button 2. The one end side of the push button 2 is placed on the other side of the push button 2 by arranging the push button 2 in a shape such that the reinforcing strength is relatively high, or by increasing the thickness of the push button side wall portion 25 relatively. The pressing operation can be made easier than the end side.

  In the above-described embodiment, the arm 22 is exemplified as a plate-like one. However, the arm 22 is not limited to a plate-like shape as long as it can be bent during the operation of the main body 21. . For example, the arm 22 may have another shape such as a rod shape.

  Moreover, in the said embodiment, the engaging part 23 is illustrated as a substantially U-shaped thing, and the engaging claw C of the to-be-engaged part 14 is illustrated as a protruding claw-shaped member engaged with the engaging part 23. However, the engagement between the engaging portion 23 and the engaged portion 14 may be realized by another structure. For example, the engaging portion 23 side may be a convex portion and the engaged portion 14 side may be a concave portion to engage with the concave portion. Further, the positions of the engaging portion 23 and the engaged portion 14 are not limited to those illustrated.

  Further, in the above embodiment, the pair of sandwiching portions H1 and H2 is configured such that the sandwiching portion H1 is plate-shaped and the sandwiching portion H2 is configured by two rail-shaped portions in the present embodiment. H2 only needs to be able to hold the arm 22, and may be plate-shaped, rail-shaped, or other shapes. Further, in the present embodiment, the sandwiching portion H2 is shown as protruding from the inner surface of the housing 1, but the inner surface itself of the housing 1 may be used as the sandwiching portion H2.

  Moreover, in the said embodiment, although the clamping parts H1 and H2 and the standing part E were connected, each of the clamping part H1, the clamping part H2, and the standing part E may be separate. .

  In the above-described embodiment, the attachment of the arm 22 to the housing 1 shows the engagement of the engaging portion 23 of the arm 22 and the engaged portion 14. The attachment is not limited to the above-described embodiment, and can be performed by attachment by welding, attachment by another engagement structure, or other known attachment structures. In the above embodiment, two arms 22 are shown, but the number of arms 22 is not limited. In the above-described embodiment, the arm 22 extends in a direction substantially perpendicular to the longitudinal direction L and the pressing direction P of the push button 2, but the extending direction of the arm 22 is not particularly limited.

DESCRIPTION OF SYMBOLS 1 Housing | casing 11 Alarm part 12 Display part 13 Opening part 14 Engagement part 14a 1st to-be-engaged part 14b 2nd to-be-engaged part 15 Press part 151 Leaf spring part 152 To-be-contacted part 152a Contact portion 152b Second contacted portion 153 Switch operation portion 154 Plate-like body 16 Press portion opening portion 17 Button attachment portion 17a Mounting surface 17b Stepped portion 18 Guide hole 19 Housing side wall portion 19a, 19b, 19c Wall body 19d Housing-side central wall 1A Front-side housing 1B Rear-side housing 2 Push button 21 Body 21a Edge 21b Contact 21c Tapered surface 21d Back of body 22 Arm 22a First arm 22b Second arm 23 Joint part 24 Projection part 25 Push button side wall part 26 Push button side center wall part A Alarm B Substrate C Engaging claw E Standing part F Front of housing H1, H2 Nipping part I A The insertion direction L longitudinal direction P pressing direction PR floating preventing protrusions R uplift preventing recess S switch section S1 of the arm, S2 fulcrum

Claims (5)

An alarm device comprising a housing and a wide push button provided on the front side of the housing,
The push button is
A main body that is operated at the time of pressing, and an arm that extends from the main body toward the inside of the housing and is connected to the inside of the housing.
The housing is
A button attachment portion to which the main body portion is attached; and an opening formed in the button attachment portion into which the arm is inserted,
The alarm device includes an insect repellent mechanism for preventing insects from entering an opening formed in the button mounting portion,
Provided on the button attachment portion, and includes a housing side wall portion surrounding the opening, and a push button side wall portion provided on the back surface of the main body portion and surrounding the base end portion of the arm,
The push button side wall is provided adjacent to the housing side wall ,
A predetermined gap that allows a pressing stroke of the push button in the pressing direction is formed between the housing side wall and the main body, and between the push button side wall and the button mounting portion. Alarm. Between the upper end of the housing side wall and the back surface of the main body, and
Between the lower end of the push button side wall and the button mounting portion,
The alarm device according to claim 1, wherein a predetermined gap that allows a pressing stroke of the push button in the pressing direction is formed. An alarm device comprising a housing and a wide push button provided on the front side of the housing,
The push button is
A main body that is operated at the time of pressing, and an arm that extends from the main body toward the inside of the housing and is connected to the inside of the housing.
The housing is
A button attachment portion to which the main body portion is attached; and an opening formed in the button attachment portion into which the arm is inserted,
The alarm device includes an insect repellent mechanism for preventing insects from entering an opening formed in the button mounting portion,
Provided on the button attachment portion, and includes a housing side wall portion surrounding the opening, and a push button side wall portion provided on the back surface of the main body portion and surrounding the base end portion of the arm,
The push button side wall is provided adjacent to the housing side wall,
The housing is pressed by the main body and has a pressing portion configured to operate a switch unit in the housing;
The pressing portion is disposed in a pressing portion opening formed in a central portion in the longitudinal direction of the button mounting portion,
The button attachment portion is provided with a housing-side central wall portion surrounding the opening for the pressing portion,
An alarm device in which a push button side central wall portion is provided on the back surface of the main body portion along the housing side central wall portion. An alarm device comprising a housing and a wide push button provided on the front side of the housing,
The push button is
A main body that is operated at the time of pressing, and an arm that extends from the main body toward the inside of the housing and is connected to the inside of the housing.
The housing is
A button attachment portion to which the main body portion is attached; and an opening formed in the button attachment portion into which the arm is inserted,
The alarm device includes an insect repellent mechanism for preventing insects from entering an opening formed in the button mounting portion,
Provided on the button attachment portion, and includes a housing side wall portion surrounding the opening, and a push button side wall portion provided on the back surface of the main body portion and surrounding the base end portion of the arm,
The push button side wall is provided adjacent to the housing side wall,
The alarm device, wherein the housing side wall includes a wall body capable of guiding the arm in the insertion direction of the arm. Either one of the housing side wall and the push button side wall, or one of the housing side central wall and the push button side central wall has a lifting prevention protrusion for preventing the push button from lifting. Formed,
The other side of the casing side wall and the push button side wall, or the other side of the casing side central wall and the push button side central wall, has a lifting prevention recess that engages with the lifting prevention protrusion. The alarm device according to claim 3 formed.

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