CN218585456U - Gas alarm and intelligent home system - Google Patents

Abstract

The utility model discloses a gas alarm, and an intelligent home systems with gas alarm is disclosed, relate to domestic appliance technical field, the gas alarm includes the casing, the casing includes the roof, diapire and periphery wall, roof and diapire are connected to the periphery wall, the periphery wall includes first face and the second face of arranging along the axis of casing, first gas pocket has been seted up to the first face, the second gas pocket has been seted up to the second face, the second face is located between first face and the diapire, the arbitrary distance of a little to the axis of casing of first face is first distance, the arbitrary distance of a little to the axis of casing of second face is the second distance, first distance is greater than the second distance, the second gas pocket of second face can be sheltered from to the first face, can improve the outward appearance effect, along the axis of casing, and follow the roof towards the direction of diapire, the second distance reduces gradually, the increase of the second facial area, can increase the aperture of second gas pocket, can strengthen the air current circulation, improve the sensitivity that the gas alarm detected the gas.

Description

Gas alarm and intelligent home system

Technical Field

The utility model relates to the technical field of household appliances, in particular to gas alarm and intelligent home systems.

Background

Cooking appliances using gas, such as gas cookers, are generally provided in kitchens, and these appliances have safety problems of gas leakage, and it is common to detect whether gas leakage occurs in kitchens by using gas alarms. Among the correlation technique, the gas alarm is installed on the wall usually, and the gas pocket has been seted up to the surface of gas alarm, because the user has certain requirement to the outward appearance, requires that the gas pocket not be seted up in the front of gas alarm, if the gas pocket is seted up in the back of gas alarm, the gas pocket can be sheltered from by the wall, leads to the circulation of air current relatively poor, can influence the sensitivity of gas alarm, and when the gas pocket was only seted up in the side of gas alarm, the circulation of air current was also not good enough.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a gas alarm can strengthen the mobility of air current, improves the sensitivity that detects the gas to improve gas alarm's outward appearance effect.

The utility model discloses still provide the intelligent home systems who has above-mentioned gas alarm.

According to the utility model discloses gas alarm of first aspect embodiment, include: the casing, including roof, diapire and periphery wall, the periphery wall is connected the roof with the diapire, the periphery wall includes the edge first face and the second face that the axis of casing was arranged, the second face be located first face with between the diapire, first arbitrary a little arrival of face the distance of the axis of casing is first distance, arbitrary a little arrival of second face the distance of the axis of casing is the second distance, first distance is greater than the second distance is followed the axis of casing, and is followed the roof orientation the direction of diapire, the second distance reduces gradually, first gas pocket has been seted up to first face, the second gas pocket has been seted up to the second face.

According to the utility model discloses gas alarm of first aspect embodiment has following beneficial effect at least: when the gas alarm is used, the shell of the gas alarm is installed on the wall body, the bottom wall of the shell faces the wall body, the first face is provided with the first air hole, the second face is provided with the second air hole, the first distance is larger than the second distance, the second face is located between the first face and the bottom wall of the shell, the second distance is gradually reduced from the top wall of the top wall towards the bottom wall, when the gas alarm is watched from the top wall of the shell, the first face shields the second face, the second air hole of the second face is not easy to observe, the appearance effect can be improved, the second distance is gradually reduced along the axis direction of the shell, the surface area of the second face can be increased, so that more second air holes can be arranged, the aperture of the second air hole can be also increased, the air flow circulation can be enhanced, the flow diffusion of gas is promoted, the flow circulation is enhanced, and the sensitivity of the gas alarm for detecting gas is improved.

According to some embodiments of the invention, the axis of the first air hole is perpendicular to the axis of the housing, and the axis of the second air hole is parallel to the axis of the housing.

According to some embodiments of the present invention, a reference plane is defined, the reference plane is perpendicular to the axis of the housing, the second surface is close to the edge of the top wall, the projection is on the reference plane forming a first boundary, the second surface is close to the edge of the bottom wall, the projection is on the reference plane forming a second boundary, the minimum distance between the first boundary and the second boundary is S, and S satisfies: s is more than or equal to 5mm.

According to some embodiments of the present invention, a reference plane is defined, the reference plane is perpendicular to the axis of the housing, the second face is a plane, the second face is inclined with the reference plane, the second face is P with the included angle of the reference plane, P satisfies: p is more than or equal to 30 degrees and less than or equal to 60 degrees.

According to some embodiments of the utility model, the casing includes protecgulum and hou gai, the protecgulum lid is located the back lid, first face is located the protecgulum, the second face is located the back lid, the protecgulum with be equipped with the installation cavity between the back lid, install the circuit board in the installation cavity.

According to some embodiments of the utility model, the circuit board is equipped with circuit element, circuit element includes gas sensing element, gas sensing element orientation the back lid sets up, gas sensing element is located first gas vent department.

According to some embodiments of the invention, the gas sensitive element is at a minimum distance d from the first gas hole, the distance d satisfying: d is more than or equal to 3mm and less than or equal to 25mm.

According to some embodiments of the present invention, the circuit element includes a first element, the first element and the gas sensing element are located on the same side, and a ratio of a height of the first element to a height of the gas sensing element is less than or equal to 2/3.

According to some embodiments of the present invention, the front cover is to the maximum distance of the back cover is T the circuit board is to the maximum distance of the back cover is N, T and N satisfy: N/T is more than or equal to 0.5 and less than or equal to 0.9.

According to the utility model discloses intelligent home systems of aspect two embodiment, including the gas alarm of aspect one embodiment.

According to the utility model discloses intelligent home systems of second aspect embodiment owing to include the gas alarm of first aspect embodiment, has foretell beneficial effect at least.

According to some embodiments of the utility model, intelligent home systems includes the refrigerator, the refrigerator has the communication module who is used for communicating with user's terminal equipment, the gas alarm with communication module communication connection, with to refrigerator transmission alarm signal.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic diagram of a gas alarm according to some embodiments of the present invention;

FIG. 2 is an exploded view of a gas alarm in accordance with certain embodiments of the present invention;

FIG. 3 is an enlarged view at A shown in FIG. 2;

FIG. 4 is an enlarged view of the view shown in FIG. 3 and at B;

fig. 5 is a cross-sectional view of a gas alarm in accordance with some embodiments of the present invention;

fig. 6 is a schematic structural view of a gas alarm according to some embodiments of the present invention;

fig. 7 is a schematic structural view of a gas alarm according to some embodiments of the present invention;

FIG. 8 is an enlarged view at C shown in FIG. 7;

fig. 9 is an exploded view of a rear cover according to some embodiments of the present invention;

fig. 10 is a schematic structural view (hidden cover plate) of the gas alarm according to some embodiments of the present invention;

fig. 11 is a schematic structural view of a rear cover according to some embodiments of the present invention;

FIG. 12 is an enlarged view at D shown in FIG. 11;

fig. 13 is a schematic structural view of a fixing plate according to some embodiments of the present invention;

fig. 14 is an enlarged view at E shown in fig. 13;

fig. 15 is a schematic view of a state of a gas alarm according to some embodiments of the present invention;

fig. 16 is a cross-sectional view of a gas alarm in accordance with some embodiments of the present invention;

FIG. 17 is an enlarged view at F shown in FIG. 16;

fig. 18 is a schematic view of a state of a gas alarm according to some embodiments of the present invention;

fig. 19 is a cross-sectional view of a gas alarm in accordance with some embodiments of the present invention;

FIG. 20 is an enlarged view at G shown in FIG. 19;

fig. 21 is a schematic structural view of a rear cover according to some embodiments of the present invention;

fig. 22 is a schematic view of the installation of a gas alarm according to some embodiments of the present invention;

FIG. 23 is an enlarged view at H shown in FIG. 22;

fig. 24 is a schematic view of the installation of a gas alarm according to some embodiments of the present invention;

fig. 25 is a schematic structural diagram of a key according to some embodiments of the present invention;

fig. 26 is a schematic structural view of a front cover according to some embodiments of the present invention;

FIG. 27 is an enlarged view at I shown in FIG. 26;

fig. 28 is a schematic structural view of a gas alarm according to some embodiments of the present invention (with a rear cover hidden);

FIG. 29 is an enlarged view at J shown in FIG. 28;

fig. 30 is a schematic structural view of a rear cover according to some embodiments of the present invention;

FIG. 31 is an enlarged view at K shown in FIG. 30;

fig. 32 is a schematic structural view of a rear cover and a key according to some embodiments of the present invention;

FIG. 33 is an enlarged view at L shown in FIG. 31;

fig. 34 is a schematic structural view of a rear cover and a key according to some embodiments of the present invention;

FIG. 35 is an enlarged view at M shown in FIG. 34;

fig. 36 is a cross-sectional view of a gas alarm in accordance with some embodiments of the present invention.

Reference numerals:

a gas alarm 1000;

the portable electronic device comprises a shell 100, a first surface 101, a second surface 102, a through hole 103, a first opening 104, a second opening 105, a channel 106, a first groove 107, a first supporting part 108, a connecting part 109, a threaded hole 110, a mounting groove 111, a peripheral wall 1111, a bottom wall 1112, a limiting part 112, a first limiting space 113, a front cover 114, a rear cover 115, a flange part 116, a bending part 117, a third opening 118, a first buckle 119, a first cantilever part 120, a first buckle part 121, a second buckle 122, a convex strip 123, a labeling area 124, a key hole 125, a first limiting structure 126, a surrounding rib part 127, a sliding groove 128, a second limiting space 129, a second limiting structure 130, a second groove 131, a fourth buckle 132, a fourth cantilever part 133, a third buckle part 134, a third supporting part 135, a first air hole 136, a second air hole 137 and a second supporting part 138;

the gas sensor comprises a circuit board 200, a wiring terminal 201, a wiring hole 202, a connecting wire 203, a gas-sensitive sensing element 204, a buzzer 205, a warning lamp 206, a switch element 207 and a power socket 208;

a fixing plate 300, an installation part 301, a limiting groove 302, a notch 303, a third buckle 304, a second cantilever part 305, a second hook part 306, a clamping groove 307, a first sinking platform 308, a second sinking platform 309 and a holding part 310;

a key 400, a pressing part 401, a fixing part 402, an elastic part 403, a third cantilever part 404, an abutting part 405, and a rib 407;

a cover plate 500 and an escape groove 501.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Among the correlation technique, in order to realize reminding the user to take place the gas leakage under nobody's scene at home, the gas alarm has been equipped with internet function, after detecting the gas leakage, the gas alarm can remind the user through the internet, at present, the gas alarm is through installing wiFi module direct networking in inside, with user terminal equipment communication, the cost is higher, because the gas alarm needs long-term monitoring, the gas alarm needs long-term access network, specifically, the inside wiFi module of gas alarm inserts the network for a long time, generally be connected with the router, the network resource that can lead to taking like this is more.

Based on this, refer to fig. 1 and show, do the utility model relates to a gas alarm's of embodiment schematic diagram, gas alarm is used for having the intelligent home systems of intelligent household electrical appliances, and intelligent household electrical appliances can be refrigerator, TV etc, and intelligent household electrical appliances include first bluetooth module and wiFi module, first bluetooth module and wiFi module communication connection, can transmit messages, and it can be understood that first bluetooth module and wiFi module can be integrated in same chip, and first bluetooth module and wiFi module also can be realized by two chips respectively. The gas alarm comprises a gas-sensitive sensing module, a second Bluetooth module and a control module, wherein the gas-sensitive sensing module can be a gas-sensitive sensing element, the gas-sensitive sensing module can detect the concentration of gas in the air, when the concentration of the gas exceeds a threshold value, the gas-sensitive sensing module judges that the gas leaks, the second Bluetooth module is in communication connection with the first Bluetooth module of the intelligent household appliance, and the control module can be a logic operation unit such as a processor.

Terminal equipment and intelligent household electrical appliances's wiFi module communication connection, terminal equipment can receive the alarm signal of gas alarm, terminal equipment specifically can be the smart mobile phone, APP in the smart mobile phone inserts the internet, wiFi module communication through internet and intelligent household electrical appliances, it can be understood, specifically, the wiFi module of intelligent household electrical appliances can with router communication connection, the router inserts the internet, when the user is outdoor, terminal equipment passes through mobile data and inserts the internet, or, when the user is at home, the wiFi module of intelligent household electrical appliances inserts the LAN of router, terminal equipment can insert the LAN of router, alarm signal passes through LAN and transmits terminal equipment, need not to insert the internet, save the resource more.

Above-mentioned gas alarm is at the during operation, detect when gas sensing module takes place the gas leakage, gas sensing module sends sensing signal to control module, control module connects according to gas sensing module's sensing signal, control second bluetooth module sends alarm signal to first bluetooth module, alarm signal sends to the wiFi module by first bluetooth module, alarm signal sends to terminal equipment by the wiFi module again, realize reminding the user, terminal equipment's warning mode can be the jingle bell, vibrations or the screen is high bright etc.. The WiFi module in the gas alarm is replaced by the Bluetooth module, the alarm signal is sent to the terminal equipment of a user by means of the WiFi module of the intelligent household appliance, the remote monitoring function is achieved, the cost of the Bluetooth module is low, the power consumption of the Bluetooth module is also low, indirect networking is achieved by means of the WiFi module in the intelligent household appliance, network resources can be optimized, and the cost-saving effect is achieved.

It can be understood, according to the utility model relates to an intelligent home systems, intelligent home systems include the gas alarm and the intelligent household electrical appliances of first aspect embodiment, and intelligent home systems can communicate with user's terminal equipment, and intelligent household electrical appliances specifically can be the refrigerator, and the refrigerator has long-term circular telegram, the characteristics of long-term standby as the peripheral core product in kitchen, suits with the demand of gas alarm, can realize long-term monitor function.

It can be understood that originally, gas alarm and refrigerator are long-term access network, and the network resource that consumes is more, and in above-mentioned gas alarm, only the wiFi module of refrigerator is connected with the router for a long time, can optimize network resource, reduces the router load.

It should be noted that, above-mentioned second bluetooth module, gas-sensitive sensing module, control module all can be integrated on the circuit board, and the volume is less, and is integrated easily, and specifically, the casing of gas alarm is located to the circuit board.

It can be understood that the intelligent household system of above-mentioned embodiment includes gas device, and gas device includes the gas valve, and the break-make that the gas valve is used for controlling the gas, and the gas alarm is connected with the gas valve, and the gas alarm can control the gas valve and open and close, specifically, when gas sensing module detected the gas and took place to leak, control module control gas valve was closed, stopped to supply the gas to the gas stove, played the guard action. Specifically, it can be understood that the gas alarm is provided with the wiring terminal, and the wiring terminal is connected with the gas valve through the connecting wire, so that the gas alarm is connected with the gas valve of the gas stove, and the connection is more convenient.

Among the correlation technique, to foretell binding post, under the effect of gravity, the connecting wire is easily dragged and leads to its and binding post pine to take off, and the connecting wire takes off with the binding post pine can lead to the disconnect with the gas valve, loses leakage protection.

Based on this, referring to fig. 7 to 11, according to the gas alarm 1000 of an embodiment of the present invention, the gas alarm 1000 includes a housing 100 and a cover plate 500, the housing 100 has a through hole 103, specifically, the through hole 103 is opened in the rear cover 115, a connection terminal 201 is disposed in the through hole 103, a peripheral wall of the through hole 103 is disposed around the connection terminal 201, and the through hole 103 may be square or circular. When the through hole 103 is square, the shape of the through hole 103 is matched with that of the connection terminal 201. The connecting wire 203 of the connecting terminal 201 is connected with a gas valve of a gas stove, two ends of the through hole 103 are arranged in an open mode, the through hole 103 forms a first opening 104 on the outer surface of the shell 100, and a tool can be inserted into the first opening 104 through the through hole 103 to perform a connecting operation on the connecting terminal 201. The cover plate 500 covers the first opening 104 to press the connection line 203, the cover plate 500 is understood to be a part of the housing 100, a channel 106 is formed between the cover plate 500 and the housing 100, the channel 106 is communicated with the first opening 104, and the channel 106 is used for the connection line 203 to pass through to extend out of the through hole 103 to be connected with an external element.

Referring to fig. 10, it can be understood that the terminal 201 is provided with a wire insertion hole 202, the connecting wire 203 is inserted into the wire insertion hole 202, a fastening member is screwed into the wire insertion hole 202, the fastening member can compress the connecting wire 203 to enhance the compression effect, and the fastening member can be a screw specifically.

As for the gas alarm 1000, referring to fig. 8, when the connection line 203 of the connection terminal 201 is installed, the connection line 203 passes through the channel 106, the cover plate 500 covers the first opening 104, the cover plate 500 can cover the connection terminal 201, the cover plate 500 further compresses the connection line 203, the cover plate 500 can also be matched with the channel 106 to compress the connection line 203, the compression effect can be enhanced, and the connection line 203 is not easily loosened from the connection terminal 201 when pulled.

Referring to fig. 16 and 21, it can be understood that the connection terminal 201 is located in the through hole 103, and the peripheral wall of the through hole 103 surrounds the connection terminal 201, so that when the connection wire 203 is installed, foreign matters from the outside are not easy to enter the connection terminal 201, and the blocking of the connection is avoided.

Referring to fig. 8, it can be understood that the channel 106 may be formed by the cover plate 500 and the housing 100, specifically, the channel 106 is provided as a groove structure, the first groove 107 is recessed on the surface of the housing 100, the channel 106 is formed by the first groove 107, the first groove 107 is formed to adapt to the shape of the connection line 203, so that the connection line 203 may be clamped into the first groove 107, the first groove 107 is a through groove structure, the connection line 203 may be directly pressed into the first groove 107, and the first groove 107 has a certain wire harness effect. In addition, since the first groove 107 is formed by recessing the surface of the housing 100, when the connection line 203 is located in the first groove 107, as shown in fig. 6 and 7, the connection line 203 does not protrude from the surface of the housing 100, so that the surface of the housing 100 can be ensured to be flat, which is beneficial for the housing 100 to be matched with the fixing plate 300.

Referring to fig. 8, it can be appreciated that when the channel 106 is formed by the cover plate 500 and the housing 100, a groove structure may be provided on the cover plate 500 and the housing 100. Referring to fig. 8, an avoiding groove 501 is formed at an end of the cover plate 500, the avoiding groove 501 is used for avoiding the connecting wire 203, the first groove 107 is concavely formed on the surface of the housing 100, the avoiding groove 501 is correspondingly arranged with the first groove 107, and the avoiding groove 501 and the first groove 107 form the above-mentioned channel 106, so that the connecting wire 203 is ensured not to protrude out of the surface of the housing 100, and the connecting wire 203 is prevented from being scratched by collision when the housing 100 is matched with the fixing plate 300. The avoidance groove 501 may avoid over-compressing the connection line 203.

Referring to fig. 10, 16 and 21, it can be understood that a circuit board 200 is disposed in the housing 100, the connection terminal 201 is connected to the circuit board 200, the through hole 103 forms a second opening 105 on an inner surface of the housing 100, and the second opening 105 extends toward the circuit board 200, so that a wall surface at a periphery of the second opening 105 can support the circuit board 200, specifically, it can also be understood that a length of the through hole 103 is greater than a wall thickness of the housing 100, a periphery of the through hole 103 extends toward an inner portion of the housing 100 to form a counter structure, a periphery wall of the counter structure can support the circuit board 200, and when the gas alarm 1000 is impacted, the circuit board 200 is supported by the second opening 105 and is not easy to fall off.

Referring to fig. 11, it can be understood that the sidewall of the through hole 103 is convexly provided with the first supporting portion 108, the first supporting portion 108 is used for supporting the connection line 203, the first supporting portion 108 can tension the connection line 203, and the connection line 203 is bent due to the protrusion of the first supporting portion 108, or alternatively, the cover plate 500 and the first supporting portion 108 can compress the connection line 203, so that the stress direction of the connection line 203 is changed, and in combination with the compressing effect of the cover plate 500, the compressing effect on the connection line 203 can be enhanced. It is understood that an inclined surface may be provided on the first support 108, and the connection line 203 is pressed against the inclined surface of the first support 108, so that the connection line 203 bends to change the force direction.

Referring to fig. 11, it can be understood that a connecting portion 109 is disposed on the first supporting portion 108, the connecting portion 109 is of a cylindrical structure, a threaded hole 110 is formed in the connecting portion 109, a fastener is screwed into the threaded hole 110, the fastener penetrates through the cover plate 500, the fastener is used for fixing the cover plate 500, and the dismounting and the mounting are convenient. It can be understood that there are two connecting lines 203, the first supporting portion 108 is located between the two connecting lines 203, and the avoiding function is performed, the connecting portion 109 is located at the top of the first supporting portion 108, the occupied space is small, and the space can be fully utilized.

It is understood that the first support 108 is located inside the through hole 103, and the first support 108 does not protrude outside the through hole 103.

Referring to fig. 2 and 22, it can be understood that the gas alarm 1000 includes a housing 100, the housing 100 includes a front cover 114 and a rear cover 115, it should be noted that the front cover 114 is a part of the housing 100 facing toward a user, the rear cover 115 is a part of the housing 100 facing away from the user, the front cover 114 and the rear cover 115 are connected by a snap, and the front cover 114 and the rear cover 115 form a mounting cavity for mounting the circuit board 200. It is understood that the front cover 114 and the rear cover 115 may be specifically circular, square, oval, or the like.

Referring to fig. 2, it can be understood that a flange portion 116 is provided at the periphery of the front cover 114, the flange portion 116 is provided around the front cover 114, the flange portion 116 has a ring structure, the flange portion 116 may be perpendicular to the bottom wall of the front cover 114, an opening is formed at the top of the flange portion 116, and the rear cover 115 covers the opening of the flange portion 116. The rear cover 115 is provided with a bent portion 117, the bent portion 117 is formed by bending the bottom wall of the rear cover 115, and the bent portion 117 is in an annular structure. It is understood that the circuit board 200 may be positioned within the inner front cover 114 due to the provision of the flange portion 116, the volume of the cavity formed within the front cover 114 being greater than the volume of the cavity formed within the rear cover 115.

Referring to fig. 5 and 28, it can be understood that the circuit board 200 is disposed in the front cover 114, the circuit board 200 can be clamped in the front cover 114 by a snap-fit structure, the flange portion 116 of the front cover 114 surrounds the circuit board 200, the circuit board 200 is disposed in the front cover 114, the circuit board 200 is closer to the front cover 114, and the maximum distance from the circuit board 200 to the front cover 114 is smaller than the maximum distance from the circuit board 200 to the rear cover 115. The circuit board 200 is provided with a first circuit component having a smaller height than a second circuit component, the first circuit component being disposed toward the front cover 114, and the second circuit component being disposed toward the rear cover 115, making it possible to sufficiently utilize the space.

Specifically, the first circuit element may be the warning light 206, the warning light 206 may play a role in reminding, the warning light 206 needs to face the user, since the front cover 114 faces the user, the warning light 206 may be disposed toward the front cover 114, so as to enhance the reminding effect, the second circuit element may be the power socket 208, since the rear cover 115 faces away from the user, the rear cover 115 generally faces toward the wall, so the power socket 208 may face toward the rear cover 115, and the height of the warning light 206 is smaller than that of the power socket 208, in this case, the circuit board 200 is disposed close to the front cover 114, so that the distance from the circuit board 200 to the rear cover 115 is larger, and the circuit element with a larger height is disposed toward the rear cover 115, so that the space inside of the casing 100 may be fully utilized, and the thickness of the casing 100 may be further reduced. The second circuit element may also be a buzzer 205, a gas sensor element 204, or the like.

It is to be understood that, with the above-described embodiment, when the height of the second circuit element is greater than 6mm and the height of the first circuit element is less than 6mm, the space utilization effect is better, and when the height of the first circuit element or the second circuit element is equal to 6mm, the first circuit element or the second circuit element may be disposed toward the front cover 114 or the rear cover 115.

Referring to fig. 3, it can be understood that the rear cover 115 is provided with a first latch 119, the first latch 119 includes a first cantilever portion 120, the first cantilever portion 120 is of a square structure, the first cantilever portion 120 extends toward the front cover 114, the first cantilever portion 120 is provided with a latch portion, the latch portion may be of a trapezoid or triangle structure, the front cover 114 is provided with a second latch 122, the second latch 122 may be disposed on the flange portion 116, the second latch 122 includes a protruding strip 123, the protruding strip 123 is horizontally disposed, the first cantilever portion 120 extends into the front cover 114, and the latch portion may be latched with the protruding strip 123. Because the front cover 114 is provided with the flange part 116, the second buckle 122 is provided with the first cantilever part 120, and the first cantilever part 120 extends into the front cover 114, the thickness of the rear cover 115 can be reduced, and the space is fully utilized.

Referring to fig. 2, 21 and 30, it can be understood that a plurality of first buckles 119 and a plurality of second buckles 122 may be provided, the first buckles 119 and the second buckles 122 are in one-to-one correspondence, specifically, the front cover 114 and the rear cover 115 are square, the first buckles 119 are four, the four first buckles 119 are disposed at four corners of the rear cover 115, the four second buckles 122 are four, and the four second buckles 122 are disposed at four corners of the front cover 114, so that the first air holes 136 of the front cover 114 and the second air holes 137 of the rear cover 115 are prevented from being blocked, the space is fully utilized, and the thickness of the housing 100 is reduced.

Referring to fig. 4 and 29, it can be understood that the circuit board 200 is fixed to the front cover 114 through a snap structure, a third supporting portion 135 is convexly disposed in the front cover 114, the third supporting portion 135 is used for supporting the circuit board 200, a fourth snap 132 is disposed in the front cover 114, the fourth snap 132 includes a fourth cantilever portion 133, the fourth cantilever portion 133 is provided with a third snap hook portion 134, the circuit board 200 and the third snap hook portion 134, and the third snap hook portion 134 is used for snapping the circuit board 200, so that the fixing effect is good, the mounting operation is also convenient, the circuit board 200 only needs to be lightly snapped into the third snap hook portion 134, the fourth snap 132 and the third supporting portion 135 are plate-shaped, and the occupied space is small.

In the correlation technique, because gas alarm 1000 installs on the wall usually, the surface of gas alarm 1000 is seted up there is the gas pocket, because the user has certain requirement to the outward appearance, requires that gas alarm 1000's front does not set up the gas pocket, if the gas pocket is seted up in gas alarm 1000's back, the gas pocket can be sheltered from by the wall, leads to the circulation of air current relatively poor, can influence gas alarm 1000's sensitivity, and when the gas pocket was only seted up in gas alarm 1000's side, the circulation of air current was also not good enough.

Based on this, referring to fig. 5, according to an embodiment of the present invention, the gas alarm 1000 includes a housing 100, the housing 100 is in a square or circular shape, the housing 100 includes a top wall, a bottom wall and an outer peripheral wall, the outer peripheral wall is located between the top wall and the bottom wall, the outer peripheral wall connects the top wall and the bottom wall, the top wall faces towards the user, the bottom wall is close to the wall, the outer peripheral wall includes a first surface 101 and a second surface 102, the first surface 101 and the second surface 102 are arranged along an axis of the housing, and the second surface 102 is located between the first surface 101 and the bottom wall of the housing 100. The first and second faces 101 and 102 may be annular, and the first and second faces 101 and 102 are disposed along a circumferential direction of the case 100.

Specifically, as shown in fig. 5, a distance from any point on the first surface 101 to the axis of the housing 100 is a first distance, the first distance is U, a distance from any point on the second surface 102 to the axis of the housing 100 is a second distance, the second distance is V, the first distance is greater than the second distance, i.e., U is greater than V, and in addition, the second distance gradually decreases along the axis direction of the housing 100 and along the direction from the top wall of the housing 100 to the bottom wall of the housing 100, it can be understood that, when viewed from the top wall of the housing 100, the first surface 101 blocks the second surface 102, the second air hole 137 on the second surface 102 is not easily viewed, and the appearance effect can be improved.

The first surface 101 is opened with a plurality of first air holes 136, and the plurality of first air holes 136 are arranged along the circumferential direction of the casing 100. It is understood that when the plurality of first air holes 136 are arranged along the circumferential direction of the casing 100, an air flow passage flowing along the radial direction of the casing 100 may be formed, and the air flow has better circulation. The second surface 102 is opened with a plurality of second air holes 137, and the plurality of second air holes 137 are disposed along the circumference of the casing 100. The first air hole 136 and the second air hole 137 may be in a kidney shape, a square shape, or a circular shape.

It can be understood that, when the first surface 101 and the second surface 102 are both planar, the first surface 101 and the second surface 102 are disposed obliquely, an included angle between the first surface 101 and the second surface 102 is an obtuse angle, the first surface 101 is perpendicular to an axis of the casing 100, the second surface 102 is tilted toward the inside of the casing 100, the first surfaces 101 may be provided in plural, the first surfaces 101 are disposed along a circumferential direction of the casing 100, the second surfaces 102 may be provided in plural, and the second surfaces 102 are disposed along the circumferential direction of the casing 100.

It is understood that any one of the first surface 101 and the second surface 102 may be in an arc shape, the first surface 101 and the second surface 102 may be in a circumferential surface, and the outer diameter of the first surface 101 is larger than that of the second surface 102.

For the gas alarm 1000, when in use, the housing 100 of the gas alarm 1000 is mounted on a wall, the first air hole 136 is disposed on the first surface 101, the second air hole 137 is disposed on the second surface 102, because the first distance is greater than the second distance, the second surface 102 is located between the first surface 101 and a top wall of the housing 100, when the housing 100 is viewed from the top wall, the first surface 101 shields the second surface 102, and the second air hole 137 on the second surface 102 is not easy to be viewed, so that the appearance effect can be improved, and because the second distance is gradually reduced along an axis of the housing 100, the surface area of the second surface 102 is increased relative to the surface area of the second surface 102 parallel to the axis of the housing 100, so that more second air holes 137 can be disposed, the aperture of the second air holes 137 can also be set larger, the flow volume of the air flow can be increased, the flow conductivity of the air flow can be enhanced, because the second surface 102 is inclined relative to the first surface 101, the axis of the second air hole 137 can be perpendicular to the axis of the first air hole 136, the air flow can enter a dead angle position inside the housing 100, so that the air flow diffusion of the gas can be promoted, the flow diffusion of the gas alarm 1000 can be enhanced, the gas detection sensitivity of the gas alarm 1000 can be enhanced, and the stereo sound effect can be further enhanced.

It can be understood that the axis of the first air hole 136 and the axis of the second air hole 137 may be inclined or perpendicular, so that the air flow entering the casing 100 may flow in different directions, and the air flow may enter a dead angle position in the casing 100, so as to improve the air flow mobility.

It is understood that, referring to fig. 5, the axis of the first air hole 136 is perpendicular to the axis of the housing 100, and the axis of the second air hole 137 is parallel to the axis of the housing 100, and it is also understood that the axis of the housing 100 is disposed in the front-rear direction, and the axis of the second air hole 137 is parallel to the front-rear direction. The airflow can enter dead-space locations within the housing 100, further improving airflow circulation. It should be noted that, with the above-mentioned embodiment, it is only possible to make the axis of the first air hole 136 perpendicular to the axis of the second air hole 137 if the first surface 101 and the second surface 102 are parallel, because the first distance is greater than the second distance, and the second distance is gradually reduced along the axis of the housing 100, so that the first surface 101 and the second surface 102 are relatively inclined, and if the first surface 101 and the second surface 102 are parallel, the axis of the first air hole 136 and the axis of the second air hole 137 cannot be perpendicular.

It is understood that, referring to fig. 2, when the housing 100 has a polygonal shape, a plurality of sets of the first air holes 136 and a plurality of sets of the second air holes 137 may be respectively disposed, each set of the first air holes 136 may have a plurality of first air holes 136 therein, each set of the second air holes 137 may have a plurality of second air holes 137 therein, and each set may be disposed corresponding to one side edge of the housing 100.

It can be understood that, referring to fig. 2, for the above-mentioned embodiment, the first air hole 136 is opened in the front cover 114, the second air hole 137 is opened in the rear cover 115, the outer peripheral surface of the flange portion 116 of the front cover 114 forms the above-mentioned first surface 101, the first air hole 136 is specifically opened in the flange portion 116 of the front cover 114, the outer peripheral surface of the bent portion 117 of the rear cover 115 forms the above-mentioned second surface 102, and the second air hole 137 is specifically opened in the bent portion 117 of the rear cover 115. The first air holes 136 and the second air holes 137 are prevented from being exposed to influence the appearance effect.

Referring to fig. 5, it can be understood that the present embodiment defines a reference plane, the reference plane is perpendicular to the axis of the housing 100, the second surface 102 is close to an edge of the top wall of the housing 100, and projects on the reference plane to form a first boundary, the second surface 102 is close to an edge of the bottom wall of the housing 100, and projects on the reference plane to form a second boundary, it can be understood that when the second surface 102 is annular, for example, the second surface 102 is an outer circumferential surface of a circular truncated cone structure or a curved arc-shaped curved surface, the edges are closed line segments, and are connected end to end, and when the second surface 102 is a plane, the edges are open line segments. It will be appreciated that when the second face 102 is annular, the pattern of the second face 102 projected onto the reference plane is also annular, having the first and second boundaries described above. The minimum distance from the first boundary to the second boundary is S, and S satisfies the following conditions: s is larger than or equal to 5mm, the flowing diffusion effect of the gas is better, and the fluidity can be further enhanced.

It will be appreciated that the top or bottom wall of the housing 100 may be parallel to the reference plane described above.

Referring to fig. 5, it can be understood that, in the present embodiment, the second surface 102 is a plane, the second surface 102 is disposed obliquely to the reference plane, an included angle P between the second surface 102 and the reference plane is P, and P satisfies: p is more than or equal to 30 degrees and less than or equal to 60 degrees, the flowing and diffusing effect of the gas is better, and the fluidity can be further enhanced.

Referring to fig. 2 and 28, it can be appreciated that the buzzer 205 may be disposed adjacent to the first air hole 136 or the second air hole 137, reducing the propagation distance of sound, facilitating the buzzer 205 to rapidly sound a loud alarm.

Referring to fig. 5 and 28, it can be understood that the circuit board 200 is provided with circuit elements, the circuit elements include a gas sensor 204, the gas sensor 204 is used for detecting whether gas leakage occurs, the gas sensor 204 is located at the first air hole 136, and the gas sensor 204 is located near the first air hole 136. The first air hole 136 has good air flow circulation, so that external air can easily pass through the gas-sensitive sensing element 204, the sensitivity of the gas-sensitive sensing element 204 is improved, and the detection function of the gas alarm 1000 is ensured.

Referring to fig. 5, it can be understood that the present embodiment defines that the minimum distance d between the gas sensing element 204 and the first air hole 136 satisfies: d is more than or equal to 3mm and less than or equal to 25mm, so that the gas-sensitive element 204 is relatively close to the first air hole 136, and the sensitivity of the gas-sensitive element 204 is further improved.

Referring to fig. 5, it can be understood that, in addition to the gas sensing element 204, the circuit elements described above include a first element, the first element is located on the same side as the gas sensing element 204, and a ratio of a height of the first element to a height of the gas sensing element 204 is less than or equal to 2/3, and it can be understood that the gas sensing element 204 is a circuit element with the largest height, so that the gas flow can flow through the gas sensing element 204, the condition that the gas flow of the gas sensing element 204 is blocked can be alleviated, and the sensitivity of the gas sensing element 204 can be further improved.

Referring to fig. 5 and 28, it can be understood that, because the height of the gas sensor 204 is high, in order to make reasonable use of space, the gas sensor 204 is disposed toward the rear cover 115, and is disposed in a staggered manner with respect to the circuit elements on the same side as the gas sensor 204, and the distance between the circuit elements is large, so that the condition that the airflow of the gas sensor 204 is blocked can be reduced, and the sensitivity of the gas sensor 204 can be improved.

Referring to fig. 5, it can be understood that in the case where the higher circuit components are disposed toward the rear cover 115 and the lower components are disposed toward the front cover 114, the present embodiment defines that the maximum distance from the front cover 114 to the rear cover 115 is T, the maximum distance from the circuit board 200 to the rear cover 115 is N, and T and N satisfy: N/T is more than or equal to 0.5 and less than or equal to 0.9. Enough space can be reserved for air flow flowing, the air flow fluidity is enhanced, the sensitivity of the gas-sensitive sensing element 204 is improved, the sound transmission effect is enhanced, and the better working condition of the buzzer 205 and the gas-sensitive sensing element 204 is ensured.

It can be understood that, referring to fig. 22 and 24, fig. 22 shows a wall-mounted mounting manner of the gas alarm 1000 of the present embodiment, the front cover 114 is disposed toward a user, the rear cover 115 is disposed away from the user, the rear cover 115 is used for connecting with a wall, the key 400 is disposed upward, the warning light 206 is disposed in front of the front cover 114 to attract the attention of the user, and the warning light 206 may also be disposed on the peripheral wall of the front cover 114. Fig. 24 shows a ceiling-mounted gas alarm 1000 according to this embodiment, in which the front cover 114 is disposed downward, the rear cover 115 is disposed upward, and the rear cover 115 is connected to an upper wall.

Among the correlation technique, the common mounting means of gas alarm 1000 has wall-hanging installation and ceiling type installation, and at present, gas alarm 1000 usually is through the fix with screw on the wall body, and it is difficult to dismantle gas alarm 1000, and the installation operation is convenient inadequately, and perhaps, gas alarm 1000 is fixed in the wall body through the fixed glue, and the time is fixed relatively poor after a long time to can not dismantle repeatedly.

Based on this, as shown in fig. 11 to 14, the utility model discloses a gas alarm 1000 of embodiment, including casing 100 and fixed plate 300, casing 100 is sunken to be equipped with mounting groove 111, mounting groove 111 is by the concave formation in surface of casing 100, mounting groove 111 has perisporium 1111 and diapire 1112, perisporium 1111 of mounting groove 111 is connected with diapire 1112 of mounting groove 111, perisporium 1111 of mounting groove 111 surrounds diapire 1112 of mounting groove 111, part perisporium 1111 of mounting groove 111 is protruding to be equipped with spacing portion 112, spacing portion 112 specifically can be squarely, spacing portion 112 has first spacing space 113 with the diapire 1112 of mounting groove 111. The fixing plate 300 is fixed on a wall, specifically, the fixing plate 300 may be fixed on the wall by screws or fixing glue, the surface of the fixing plate 300 is convexly provided with a mounting portion 301, the mounting portion 301 may be matched with the mounting groove 111, the mounting portion 301 is concavely provided with a limiting groove 302, the limiting groove 302 may be understood as being formed by a material removing manner, the limiting groove 302 is formed with a notch 303, the limiting portion 112 may be installed in the limiting groove 302 along the notch 303, and the mounting portion 301 is inserted into the first limiting space 113.

For the above-mentioned gas alarm 1000, when in use, as shown in fig. 15 to 17, the installation portion 301 is installed into the installation groove 111 first, the installation portion 301 is movably fitted with the installation groove 111, at this time, there is no limit fit, after the installation portion 301 is installed into the installation groove 111, the limit portion 112 is aligned with the notch 303 of the limit groove 302, when the gas alarm 1000 is wall-mounted, the notch 303 of the limit groove 302 is disposed upward, at this time, the limit portion 112 is located above the notch 303, as shown in fig. 18 to 20, the housing 100 is pushed, so that the limit portion 112 is installed into the limit groove 302 along the notch 303 of the limit groove 302, at least part of the installation portion 301 is inserted into the first limit space 113, the side wall of the installation portion 301 abuts against the side wall of the limit portion 112, it can be understood that the installation portion 301 is lightly clamped with the limit portion 112 to realize limit, at this time, the limit portion 112 can only be separated from the limit groove 302 from the notch 303, a certain limit effect can be achieved, when the installation is implemented, under the action, the side wall-mounted side wall of the limit portion 112 abuts against the side wall of the limit groove 302 under the action, there is feared, there is no need to be a support effect, the gas alarm 1000, there is no need to be dropped, the limit portion 112 is convenient to be installed, and the gas alarm 1000, and the gas alarm can be repeatedly pushed, and the gas alarm can be repeatedly installed, and the installation can be repeatedly operated, and the housing 100 can be repeatedly installed.

It will be appreciated that with the above-described embodiment, when the gas alarm 1000 is mounted in a ceiling-mounted manner, the stopper portion 112 may be disengaged from the notch 303, causing the gas alarm 1000 to fall. Based on this, referring to fig. 13 and 15, in the present embodiment, the fixing plate 300 is provided with the third fastener 304, the housing 100 is provided with the fastener 307, the fastener 307 and the mounting groove 111 are located on the same side of the housing 100, the third fastener 304 can be engaged with the fastener 307, and after the limiting portion 112 is installed in the limiting groove 302, the third fastener 304 is fastened with the fastener 307, so that the fixing of the housing 100 and the fixing plate 300 is achieved, and there is no need to worry about the drop of the gas alarm 1000.

Referring to fig. 7, it can be understood that the outer surface of the rear cover 115 has a labeling area 124, and the labeling area 124 is disposed on the same side as the card slot 307 and the mounting groove 111, so that the space can be fully utilized.

Referring to fig. 6 and 7, it can be understood that, for the above-described embodiment, the mounting groove 111 and the channel 106 are located on the same side and are both located on the back surface of the rear cover 115, the channel 106 can be set as the first groove 107, and since the connecting wire 203 is located in the first groove 107, the connecting wire 203 does not protrude out of the outer surface of the housing 100, so that when the housing 100 is matched with the fixing plate 300, the housing 100 slides along the fixing plate 300, and the connecting wire 203 is not scratched by collision, and the space utilization is reasonable.

Referring to fig. 11, it can be understood that a plurality of mounting grooves 111 and mounting parts 301 may be provided, for example, two mounting grooves 111 and two mounting parts 301 are provided, the two mounting grooves 111 are located at the back of the rear cover 115, the connection terminal 201 is located between the two mounting grooves 111, and the labeling area 124 is also located between the two mounting grooves 111, so that the space can be fully utilized.

Referring to fig. 13 and 15, it can be understood that the third latch 304 includes a second cantilever portion 305, the second cantilever portion 305 does not protrude from the fixing plate 300, the second cantilever portion 305 is parallel to the fixing plate 300, specifically, the second cantilever portion 305 may be formed by forming a strip-shaped opening on the fixing plate 300, the fixing plate 300 may be made of plastic, the second cantilever portion 305 has certain elasticity, the second cantilever portion 305 is provided with a second latch portion 306, the second latch portion 306 has a protruding structure, the second latch portion 306 may have a triangular or trapezoidal shape, and the second latch portion 306 may be latched with the latch groove 307. The third buckle 304 has a simple structure, can reduce the development difficulty of the mold, and is convenient to manufacture.

It can be understood that, referring to fig. 13 and 18, the end of the second cantilever portion 305 is provided with a holding portion 310, the holding portion 310 protrudes outside the fixing plate 300, and when detaching, the second hook portion 306 can be separated from the slot 307 by slightly shifting the holding portion 310, so as to release the fixed fit, so that the housing 100 can be detached, and the detaching operation is more convenient.

In the related art, the fixing plate 300 is fixed to the wall by screws, but the fixing plate 300 is easily installed to be inclined, and the appearance is not good enough.

It can be understood that, referring to fig. 13, in the present embodiment, the fixing plate 300 has a symmetrical structure and has a symmetrical center line, the fixing plate 300 is concavely provided with a first sinking platform 308 and a second sinking platform 309 for matching with screws, the first sinking platform 308 and the second sinking platform 309 penetrate through the fixing plate 300, the first sinking platform 308 is disposed along the left-right direction, the second sinking platform 309 is disposed along the up-down direction, the left-right direction is perpendicular to the up-down direction, the first sinking platform 308 and the second sinking platform 309 are both located on the symmetrical center line of the fixing plate 300, and the first sinking platform 308 and the second sinking platform 309 may have a waist shape. Left-right direction and up-down direction specific direction can refer to the example in fig. 13, when implementing wall-mounted installation or ceiling type installation, the screw in the first heavy platform 308 can be adjusted along left-right direction, and the screw in the second heavy platform 309 can be adjusted along up-down direction, can conveniently find the horizontal point and the vertical point of fixed plate 300 for the installation of fixed plate 300 is adjusted well, improves the outward appearance effect. The first sink table 308 and the second sink table 309 may be adjustable for both wall mount and ceiling mount applications.

It is understood that the mounting part 301 may be provided to the case 100 and the mounting groove 111 may be provided to the fixing plate 300. In order to fully utilize the space, the embodiment defines that the mounting groove 111 is concavely arranged on the casing 100, in the above embodiment, the mounting groove 111 is concavely arranged on the rear cover 115, the mounting groove 111 is concavely formed by the surface of the rear cover 115, the higher circuit elements on the circuit board 200 are arranged towards the rear cover 115 in the casing 100, the space between the circuit board 200 and the rear cover 115 is larger, the mounting groove 111 is concavely formed by the surface of the rear cover 115, and the space of the part can be fully utilized to achieve full utilization. It is understood that circuit components on the circuit board 200, which are disposed toward the rear cover 115, are offset to avoid the mounting groove 111.

In the related art, the audible and visual alarm element includes the alarm lamp 206 and the buzzer 205, the alarm lamp 206 can be highlighted to give an alarm, the buzzer 205 can output an alarm sound, and after the alarm is confirmed on site by the user, in order to avoid the interference of the alarm sound with the home environment, the gas alarm 1000 needs to be turned off as soon as possible, so in order to attract the attention of the user, the confirmation button 400 is usually arranged on the front of the gas alarm 1000, but the user wants fewer elements on the front of the gas alarm 1000, and the gas alarm can be simple and beautiful.

Based on this, refer to fig. 22, according to the utility model relates to a gas alarm 1000 of embodiment, gas alarm 1000 includes casing 100, circuit board 200, button 400 and warning light 206, casing 100 specifically can be circular or polygonal shape, casing 100 includes the periphery wall, circuit board 200 locates in casing 100, button 400 is connected with circuit board 200, the periphery wall department of casing 100 is located to button 400, warning light 206 is connected with circuit board 200, warning light 206 locates by button 400, warning light 206 is close to button 400 and sets up, specifically, the pilot lamp can be located the periphery wall of casing 100, or be located the front of casing 100, the pilot lamp is close to button 400 and sets up, the lamp hole has been seted up to casing 100, warning light 206 wears to locate in the lamp hole, can be provided with the transparency in the lamp hole, warning light 206's light can see through the transparency and give out, perhaps, the region of lamp hole department is made by transparent material, can the printing opacity, can strengthen the light effect. The circuit board 200 is further provided with a switch element 207, the key 400 abuts against the switch element 207, and when the key 400 is pressed, the switch element 207 can be triggered to be turned on, so that a corresponding function is realized.

For foretell gas alarm 1000, because button 400 is located the periphery wall department of casing 100, the pilot lamp is located button 400 by, can guarantee that casing 100 is comparatively succinctly not leave the component towards user's front, when the user confirms to report to the police, warning light 206 is high-lighted, because warning light 206 is located button 400 by, warning light 206 is comparatively close to button 400, the specific position of user button 400 can be reminded to the light of warning light 206, in order to make things convenient for the user to press button 400 fast, confirm to report to the police, avoid the sound of alarm to disturb the environment at home.

Referring to fig. 2 and 25, it can be understood that the key 400 includes a pressing portion 401, a fixing portion 402 and an elastic portion 403, the fixing portion 402 is connected to the housing 100, the elastic portion 403 connects the pressing portion 401 and the fixing portion 402, the key 400 is made of plastic, the elastic portion 403 has elasticity, so that the pressing portion 401 can move relative to the fixing portion 402, a hole 125 of the key 400 is formed in the outer peripheral wall of the housing 100, the pressing portion 401 can be specifically of a cylindrical structure, the pressing portion 401 is inserted into the hole 125 of the key 400, the pressing portion 401 can move in the hole 125 of the key 400, a rib 407 is convexly disposed on one side of the pressing portion 401 facing the switch element 207, the rib 407 is of a cross structure, the rib 407 abuts against the switch element 207, and the pressing effect can be enhanced. Without limitation, the ribs 407 may be circular, square, or triangular.

Referring to fig. 25, it can be understood that the key 400 has a symmetrical structure, the pressing portion 401 is located at a middle position, a symmetrical center of the key 400 passes through the pressing portion 401, two elastic portions 403 are provided, the two elastic portions 403 are respectively located at two sides of the pressing portion 401, and two fixing portions 402 are provided, and the two fixing portions are respectively connected with the two elastic portions 403. The keys 400 are symmetrically distributed, which is beneficial to ensuring that the pressing effect of the keys 400 is better.

Referring to fig. 25, it can be understood that the elastic part 403 is bent to enhance the elasticity of the elastic part 403, and the greater the length of the elastic part 403, the greater the elastic variation, the better the elastic effect, so that the key 400 has better life and hand feeling. Specifically, the elastic portion 403 may be curved to have a waist shape, or may have a wave shape or an arc shape.

Referring to fig. 36, it can be understood that the casing 100 includes a front cover 114 and a rear cover 115, the front cover 114 is provided with a first limiting structure 126, the rear cover 115 is provided with a second limiting structure 130, the fixing portion 402 is in a strip structure, the fixing portion 402 has two ends, one end of the fixing portion 402 is engaged with the first limiting structure 126, and the other end of the fixing portion 402 is engaged with the second limiting structure 130. The first limiting structure 126 and the second limiting structure 130 are used for limiting the key 400, and when the pressing portion 401 of the key 400 is pressed, the key 400 can be limited from freely shaking to generate abnormal sound or falling off due to position deviation.

Referring to fig. 26 to 29, it can be understood that the first limiting structure 126 includes a surrounding rib portion 127, the surrounding rib portion 127 is surrounded by a second limiting space 129, one end of the fixing portion 402 is located in the second limiting space 129, and the second limiting space 129 is used for limiting the key 400 to swing freely. Specifically, the second limiting space 129 may be configured as the sliding groove 128, and the fixing portion 402 is matched with the sliding groove 128 to realize the limiting. The bead portion 127 may be formed by protruding from the inner surface of the front cover 114, for example, the bead portion 127 is in an annular structure, and the bead portion 127 is in a square shape, or the bead portion 127 includes a plurality of extending portions, and the plurality of extending portions surround to form the second limiting space 129. In the above embodiment, since the front cover 114 is provided with the flange portion 116, the space inside the front cover 114 is large, so that the bead portion 127 can be formed by protruding from the inner surface of the front cover 114.

Referring to fig. 30, 31, 34 and 35, it can be understood that the second limiting structure 130 includes a second supporting portion 138, the second supporting portion 138 can support a fixing portion 402, the second supporting portion 138 is formed by protruding an inner surface of the rear cover 115, the second supporting portion 138 is provided with a second groove 131, one end of the fixing portion 402 is inserted into the second groove 131, and the fixing portion 402 cooperates with the second groove 131 to realize the limiting.

It can be understood that, when the key 400 is assembled, the first limiting structure 126 and the second limiting structure 130 can achieve a pre-tightening effect, so that the key 400 can be conveniently assembled, and the first limiting structure 126 and the second limiting structure 130 can also reserve an installation clearance for the fourth buckle 132 and the third support portion 135, and the first buckle 119 and the second buckle 122, so as to facilitate the assembly of the front cover 114 and the rear cover 115.

Referring to fig. 5 and 36, it can be understood that, for the above-mentioned embodiment, in the housing 100, since the circuit board 200 is disposed close to the front cover 114, the higher circuit components on the circuit board 200 face the rear cover 115, and the lower circuit components face the front cover 114, based on this arrangement, the switch component 207 is disposed toward the rear cover 115, the cavity in the front cover 114 is larger, the key 400 can be located in the front cover 114, the key 400 hole 125 is opened in the flange portion 116 of the front cover 114, and the pressing portion 401 is inserted in the key 400 hole 125, so that the pressing portion 401 of the key 400 can be located in the middle position of the flange portion 116 of the front cover 114, the position is centered, and the appearance effect is better.

Referring to fig. 34, it can be understood that the key 400 includes a third cantilever portion 404, the third cantilever portion 404 has elasticity, the third cantilever portion 404 is connected to the fixing portion 402, an abutting portion 405 is disposed at an end of the third cantilever portion 404, the abutting portion 405 abuts against the housing 100, specifically, the abutting portion 405 abuts against a wall surface at the periphery of the rear cover 115, and the abutting portion 405 is in interference fit with the rear cover 115. The third cantilever portion 404 is engaged with the abutting portion 405, and can exert an elastic biasing effect to satisfy the requirement of the mounting play, specifically, the abutting portion 405 has a circular shape, and the outer peripheral wall of the abutting portion 405 abuts against the rear cover 115.

Referring to fig. 35, it can be understood that, for the above-mentioned embodiment, the side wall of the third cantilever portion 404 can abut against the side wall of the second support portion 138 to perform a limiting function, the limiting direction of the second support portion 138 to the fixing portion 402 is perpendicular to the limiting direction of the second support portion 138 to the third cantilever portion 404, the second support portion 138 realizes limiting of the key 400 in two different directions, and the limiting effect is better.

Referring to fig. 33 and 34, it can be understood that in the present embodiment, the interference between the abutment portion 405 and the rear cover 115 is Q, and Q satisfies: q is less than or equal to 0.8mm. The abutting portion 405 and the rear cover 115 are well pre-compressed, and are not excessively compressed, so that the structure of the third cantilever portion 404 is not damaged.

Referring to fig. 22 and 23, the present embodiment defines that the minimum distance between the warning light 206 and the key 400 is R, and R satisfies: r is less than or equal to 15mm. The warning light 206 can be close to the key 400, so that the reminding function can be enhanced. It should be noted that R is the minimum distance between the warning light 206 and the key 400 in space, and may also be understood as the minimum length of a straight line connecting a point on the warning light 206 to a point on the key 400.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (11)

1. Gas alarm, its characterized in that includes:

the casing, including roof, diapire and periphery wall, the periphery wall is connected the roof with the diapire, the periphery wall includes the edge first face and the second face that the axis of casing was arranged, the second face be located first face with between the diapire, first arbitrary a little arrival of face the distance of the axis of casing is first distance, arbitrary a little arrival of second face the distance of the axis of casing is the second distance, first distance is greater than the second distance is followed the axis of casing, and is followed the roof orientation the direction of diapire, the second distance reduces gradually, first gas pocket has been seted up to first face, the second gas pocket has been seted up to the second face.

2. A gas alarm according to claim 1 wherein the axis of the first air aperture is perpendicular to the axis of the housing and the axis of the second air aperture is parallel to the axis of the housing.

3. A gas alarm according to claim 1, characterised in that a reference plane is defined, said reference plane being perpendicular to the axis of said housing, said second face being adjacent to the edge of said top wall and projected on said reference plane forming a first boundary, said second face being adjacent to the edge of said bottom wall and projected on said reference plane forming a second boundary, said first boundary being at a minimum distance S from said second boundary, said S satisfying: s is more than or equal to 5mm.

4. A gas alarm according to claim 1 characterised in that a reference plane is defined, the reference plane being perpendicular to the axis of the housing, the second face being a plane, the second face being inclined to the reference plane, the second face and the reference plane forming an angle P, the angle P satisfying: p is more than or equal to 30 degrees and less than or equal to 60 degrees.

5. The gas alarm of claim 1, wherein the housing includes a front cover and a rear cover, the front cover is disposed on the rear cover, the first surface is disposed on the front cover, the second surface is disposed on the rear cover, a mounting cavity is disposed between the front cover and the rear cover, and a circuit board is mounted in the mounting cavity.

6. The gas alarm of claim 5, wherein the circuit board is provided with circuit elements including a gas sensor element disposed toward the rear cover, the gas sensor element being located at the first gas aperture.

7. The gas alarm of claim 6, wherein the gas sensitive sensing element is at a minimum distance d from the first gas vent, wherein d satisfies: d is more than or equal to 3mm and less than or equal to 25mm.

8. The gas alarm of claim 6, wherein the circuit element comprises a first element located on the same side as the gas sensing element, and a ratio of a height of the first element to a height of the gas sensing element is less than or equal to 2/3.

9. The gas alarm of claim 5, wherein the maximum distance from the front cover to the rear cover is T and the maximum distance from the circuit board to the rear cover is N, and T and N satisfy: N/T is more than or equal to 0.5 and less than or equal to 0.9.

10. An intelligent home system, comprising a gas alarm according to any one of claims 1 to 9.

11. The smart home system of claim 10, wherein the smart home system comprises a refrigerator having a communication module for communicating with a terminal device of a user, and the gas alarm is in communication with the communication module to transmit an alarm signal to the refrigerator.

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