CN209927376U - Sealed casing and gas detection device - Google Patents

Abstract

The utility model relates to a gaseous detecting instrument technical field especially relates to a sealed shell and gaseous detection device. The sealing shell comprises a first shell and a second shell, wherein a buckling groove is formed in the first shell, a buckling convex strip is formed in the second shell, and the first shell and the second shell are buckled with the buckling convex strip through the buckling groove to form the sealing shell; and the outer surface of at least one of the buckling grooves or the buckling convex strips is coated with an elastic sealing layer. The gas detection device comprises the sealed shell. This sealed casing and this gaseous detection device, at lock recess and lock sand grip matched with position, through setting up the elastic sealing layer, formed elastic material and hard material complex seam form or elastic material and elastic material complex seam form, through improving the effective area of contact of first casing and second casing in seam department, improved sealing performance, can make waterproof rank reach IP67 or even TP68 grade.

Description

Sealed casing and gas detection device

Technical Field

The utility model relates to a gaseous detecting instrument technical field especially relates to a sealed shell and gaseous detection device.

Background

The gas detector is an instrument and meter tool for detecting the concentration of leaked gas, and comprises a portable gas detector, a handheld gas detector, a fixed gas detector and the like. The gas detector generally detects parameters such as the types of gases and the concentrations of various gases existing in the environment mainly through a gas sensor.

In order to realize the gas detection function, the housing of the gas detector usually has a relatively complex circuit structure, so that when the gas detector is used in a place with relatively high water content or a place with corrosive gas, the housing of the gas detector needs to be subjected to waterproof sealing treatment.

Therefore, it is highly desirable to provide a gas detection device that has a waterproof rating at least up to the IP67 level.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first aim at one kind can reach waterproof grade and reach IP67 hierarchical sealed housing at least.

A second object of the present invention is to provide a gas detection apparatus, such that the waterproof grade at least reaches the IP67 level.

In order to achieve the above object, the present invention provides the following technical solutions;

based on the first purpose, the utility model provides a sealing shell, including first shell, second shell, be provided with the lock recess on the first shell, be provided with the lock sand grip on the second shell, first shell and the second shell pass through the lock recess with the lock sand grip looks lock so as to form the sealing shell;

and the outer surface of at least one of the buckling groove or the buckling convex strip is wrapped with an elastic sealing layer.

In any of the above technical solutions, optionally, the elastic sealing layer is coated and molded on the first shell, the hard sealing layer is coated and molded on the second shell, the fastening groove is formed in the elastic sealing layer, and the fastening protrusion is formed in the hard sealing layer;

or, first casing with all the package is moulded on the second casing the elastic sealing layer, the lock recess is seted up first casing on the elastic sealing layer, the lock sand grip is seted up the second casing on the elastic sealing layer.

In any of the above technical solutions, optionally, the first shell is sequentially coated with a first hard sealing layer and a first elastic sealing layer along the direction from inside to outside, and the second shell is sequentially coated with a second elastic sealing layer and a second hard sealing layer along the direction from inside to outside;

the first hard sealing layer is provided with a first buckling groove, the second elastic sealing layer is provided with a first buckling convex strip, and the first shell and the second shell are buckled and connected through the first buckling groove and the first buckling convex strip;

and/or, be provided with second lock recess on the first elastic sealing layer, be provided with second lock sand grip on the second elastic sealing layer, first casing with the second casing passes through second lock recess with second lock recess looks lock is connected.

In any of the above technical solutions, optionally, the sealing housing further includes a connecting member and a connecting hole, the connecting hole penetrates through the first housing and extends to the second housing, a third elastic sealing layer is coated and molded on the first housing corresponding to the connecting hole, a portion of the connecting member presses the third elastic sealing layer toward a side where the second housing is located, and another portion of the connecting member extends into the connecting hole and is fixedly connected with the connecting hole;

and a third hard sealing layer is also coated and molded between the third elastic sealing layer and the first shell.

In any of the above technical solutions, optionally, the first elastic sealing layer, the second elastic sealing layer and the third elastic sealing layer are all made of TPE;

the first hard sealing layer, the second hard sealing layer and the third hard sealing layer are all made of PC materials.

In any of the above technical solutions, optionally, the number of the fastening grooves is at least one, and the number of the fastening convex strips is consistent with the number of the fastening grooves.

Based on the second objective, the utility model provides a gas detection device, including the sealed casing, waterproof gasket, waterproof ventilated membrane and the gas sensor who sets up in the sealed casing among any one of the above-mentioned technical scheme;

a ventilation opening is formed in the sealing shell, and a waterproof gasket is arranged between the sealing shell and the gas sensor corresponding to the ventilation opening;

the air inlet end of the gas sensor faces the ventilation port, and the waterproof breathable film covers the air inlet end of the gas sensor.

In any of the above technical solutions, optionally, a waterproof buzzer and a fourth elastic sealing layer, where the waterproof buzzer is disposed inside the sealing housing;

the sealing shell is wrapped with a fourth elastic sealing layer in a plastic mode, a sound through hole penetrating through the fourth elastic sealing layer is formed in the sealing shell, the part of the waterproof buzzer stretches into the sound through hole, and the fourth elastic sealing layer is attached to the outer wall of the waterproof buzzer along the circumferential direction of the waterproof buzzer.

In any of the above technical solutions, optionally, a fourth hard sealing layer is further plastic-coated between the fourth elastic sealing layer and the sealing shell, and the sound through hole penetrates through the fourth hard sealing layer;

a cylinder is formed at the position, corresponding to the periphery of the sound through hole, of the fourth hard sealing layer, and the cylinder is sleeved on the periphery of the waterproof buzzer; and a sound amplifying gap is formed between the barrel and the waterproof buzzer.

In any of the above technical solutions, optionally, the gas detection apparatus further includes a connector female seat, the sealed housing is provided with a female seat mounting through hole, and the connector female seat is disposed in the female seat mounting through hole;

and a filling gap is formed between the connector female seat and the wall surface of the sealing shell corresponding to the female seat mounting through hole, a waterproof polymer is filled in the filling gap, and the filling gap is filled with the waterproof polymer.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model provides a seal shell, at the protruding surface cladding elastic sealing layer of at least one of lock recess or lock, thereby in lock recess and lock sand grip matched with position, through setting up the elastic sealing layer, elastic material and rigid material complex seam form or elastic material and elastic material complex seam form have been formed, through improving the effective area of contact of first casing and second casing in seam crossing, seal shell's sealing performance has been improved, can make seal shell's waterproof rank reach IP67 TP68 grade even.

The utility model provides a gas detection device can be the inside water of gas sensor through adopting waterproof ventilated membrane, and waterproof gasket can seal at gas sensor and seal shell and recommend certainly, therefore can effectively guarantee the waterproof performance of gas sensor department. Compared with the prior art, the gas detection device realizes effective water prevention of the gas sensor. The waterproof grade of the gas detection device can reach IP67 or even TP68 grade.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first structure of a sealed housing according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the seal housing of FIG. 1 at A-A;

FIG. 3 is an enlarged fragmentary view of the seal housing of FIG. 2 at B;

fig. 4 is a second schematic structural diagram of the sealed housing according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the seal housing of FIG. 4 at C-C;

fig. 6 is a schematic view of a first structure of a gas detection device according to a second embodiment of the present invention;

fig. 7 is a second schematic structural diagram of a gas detection device according to a second embodiment of the present invention;

fig. 8 is a schematic view of a third structure of a gas detection device according to the second embodiment of the present invention;

FIG. 9 is a cross-sectional view of the gas detection assembly of FIG. 8 at D-D;

FIG. 10 is a cross-sectional view of the gas detection assembly of FIG. 8 at E-E;

fig. 11 is an exploded view of a seal housing and a female connector holder of a gas detection apparatus according to a second embodiment of the present invention (a second housing is omitted);

fig. 12 is a schematic view of an installation state of the female connector seat of the gas detection device according to the second embodiment of the present invention.

Icon: 1-sealing the shell; 10-a first housing; 11-a second housing; 12-a first elastomeric sealing layer; 13-a first hard sealing layer; 14-a second elastomeric sealing layer; 15-a second hard sealing layer; 16-a first snap-fit recess; 17-first fastening convex strips; 18-a second snap-fit recess; 19-second fastening convex strips; 20-a connector; 21-a connection hole; 22-a third elastomeric sealing layer; 23-a third hard sealing layer; 3-a gas detection device; 30-a waterproof buzzer; 31-a fourth elastomeric sealing layer; 32-sound through hole; 33-a fourth hard sealing layer; 330-barrel; 34-a female connector seat; 35-a female seat mounting through hole; 36-filling the gap; 37-a gas sensor; 38-waterproof gasket; 39-waterproof breathable film; 40-ventilating port.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 to 5 in combination with fig. 6 to 12, the present embodiment provides a sealed housing; fig. 1 is a first structure of a sealed housing provided in the present embodiment; FIG. 2 is a cross-sectional view of the seal housing of FIG. 1 at A-A; fig. 3 is a partial enlarged view of the sealing housing in fig. 2 at B, clearly showing the relative positional relationship between the first latching grooves and the first latching ridges, and the relative positional relationship between the second latching grooves and the second latching ridges; fig. 4 is a second structural schematic diagram of the sealing housing provided in this embodiment; fig. 5 is a cross-sectional view of the seal housing of fig. 4 at C-C.

The sealed casing that this embodiment provided is used for gaseous detection device to guarantee the waterproof performance of sealed casing self, further with the waterproof performance who guarantees gaseous detection device. In the related art, the sealing grade of the gas detection device cannot reach the IP67 level, and the sealing grade of the shell of the gas detection device cannot reach the IP67 level, so that one of the reasons that the existing shell is not ideal in waterproof grade is as follows: casing seam crossing adopts the mode that hard material is direct to dock with hard material to form usually, because hard material's variability ability is less, so when docking through hard material and hard material, the actual area of contact of casing seam crossing is less, and then has leaded to sealed effect unsatisfactory.

Referring to fig. 1 to 5 in combination with fig. 6 to 12, the sealed housing 1 includes a first housing 10 and a second housing 11.

The first shell 10 is provided with a buckling groove, the second shell 11 is provided with a buckling convex strip, and the first shell 10 and the second shell 11 are buckled with the buckling convex strip through the buckling groove to form the sealed shell 1. By connecting the first housing 10 and the second housing 11 by snap-fitting, when the sealed housing 1 is applied to the gas detection device 3, various key components of the gas detection device 3 can be accommodated in the sealed housing 1. Further, through the mode of lock recess and lock sand grip looks adaptation, can improve butt joint precision, convenience and the reliability between first casing 10 and the second casing 11.

And the outer surface of at least one of the buckling grooves or the buckling convex strips is coated with an elastic sealing layer. That is, the fastening groove is formed on the first housing 10, and the outer surface of the fastening protrusion is covered with an elastic sealing layer; or, the buckling convex strips are formed on the second shell 11, and the outer surfaces of the buckling grooves are wrapped with elastic sealing layers; or the elastic sealing layer is wrapped on the outer surface of the buckling convex strip, and the elastic sealing layer is wrapped on the outer surface of the buckling groove. Therefore, at the position where the buckling groove is matched with the buckling convex strip, the elastic sealing layer is arranged, a seam form of matching the elastic material and the elastic material or matching the elastic material and the hard material is formed, instead of the seam form of matching the hard material and the hard material in the prior art, the effective contact area of the first shell 10 and the second shell 11 at the seam is increased, and the sealing performance of the sealing shell 1 is improved.

In addition, the elastic sealing layer is respectively connected with the first shell 10 and the second shell 11 in a plastic-coated mode, so that the elastic sealing layer and the first shell 10 or the second shell 11 form a whole, the elastic sealing layer and the first shell 10 or the second shell 11 have good fitting performance, and the situation that the waterproof effect is weakened due to random movement of the elastic sealing layer cannot occur.

In the sealing case 1 in this embodiment, the elastic sealing layer is coated on the outer surface of at least one of the fastening groove or the fastening protrusion, so that at the position where the fastening groove and the fastening protrusion are matched, by providing the elastic sealing layer, a seam form of matching an elastic material and a rigid material or a seam form of matching an elastic material and an elastic material is formed, by increasing the effective contact area of the first case 10 and the second case 11 at the seam, the sealing performance of the sealing case 1 is improved, and the waterproof level of the sealing case 1 can reach IP67 or even TP68 level.

In an alternative of this embodiment, the elastic sealing layer is wrapped and molded on the first shell 10, the hard sealing layer is wrapped and molded on the second shell 11, the fastening groove is formed on the elastic sealing layer, and the fastening convex strip is formed on the hard sealing layer. Firstly, the butt-joint relation between the first shell 10 and the second shell 11 can realize the first-level sealing to the sealing shell 1, secondly, the second-level sealing can be realized to the sealing shell 1 through the butt-joint of the elastic sealing layer and the rigid sealing layer, further, the buckling groove is arranged on the elastic sealing layer, the buckling convex strip is arranged on the rigid sealing layer, and the buckling groove is buckled with the buckling convex strip, so that the effect of increasing the effective butt-joint area between the elastic sealing layer and the rigid sealing layer can be achieved, and the effect of strengthening the second-level sealing to the sealing shell 1 is achieved. And this technical scheme can be under the prerequisite of guaranteeing sealed casing 1's waterproof grade, effectively practice thrift the cost through setting up the rigid sealing layer.

Or, the elastic sealing layers are respectively wrapped on the first shell 10 and the second shell 11, the fastening grooves are formed in the elastic sealing layers of the first shell 10, and the fastening convex strips are formed in the elastic sealing layers of the second shell 11. Firstly, the butt joint relation between first casing 10 and second casing 11 can realize the one-level sealing to sealed casing 1, secondly, can realize the second grade through the butt joint of the elastic sealing layer of first casing 10 and the elastic sealing layer of second casing 11 and seal casing 1, furtherly, through setting up lock recess and lock sand grip on the elastic sealing layer, and lock recess and lock sand grip looks lock joint, can play the effect of further increasing the effective butt joint area between the elastic sealing layer of first casing 10 and the elastic sealing layer of second casing 11, thereby play the effect of strengthening the second grade sealed to sealed casing 1.

Referring to fig. 1 to 3, in an alternative of this embodiment, a first hard sealing layer 13 and a first elastic sealing layer 12 are sequentially molded on the first casing 10 from inside to outside, and a second elastic sealing layer 14 and a second hard sealing layer 15 are sequentially molded on the second casing 11 from inside to outside. The first casing 10 is abutted with the second casing 11 to form a primary seal for the sealed casing 1, the first hard sealing layer 13 is abutted with the second elastic sealing layer 14 to form a secondary seal for the sealed casing 1, and the first elastic sealing layer 12 is abutted with the second hard sealing layer 15 to form a tertiary seal for the sealed casing 1. And the secondary seal and the tertiary seal are in a joint form of contacting an elastic material and a rigid material, so that the secondary seal and the tertiary seal have better sealing performance.

The first hard sealing layer 13 is provided with a first fastening groove 16, the second elastic sealing layer 14 is provided with a first fastening convex strip 17, and the first shell 10 and the second shell 11 are fastened and connected through the first fastening groove 16 and the first fastening convex strip 17. The first fastening groove 16 is fastened with the first fastening protrusion 17, so that the sealing performance of the secondary seal formed between the first hard sealing layer 13 and the second elastic sealing layer 14 can be enhanced.

The first elastic sealing layer 12 is provided with a second fastening groove 18, the second elastic sealing layer 14 is provided with a second fastening convex strip 19, and the first shell 10 and the second shell 11 are fastened and connected with the second fastening groove 18 through the second fastening groove 18. The second fastening grooves 18 are fastened with the second fastening protrusions 19, so that the sealing performance of the three-stage seal formed between the first elastic sealing layer 12 and the second hard sealing layer 15 can be enhanced.

Sealing shell 1 among this technical scheme, through forming the tertiary sealed to sealing shell 1, the secondary seal all adopts elastic material and hard material complex seam form with tertiary sealed to further strengthen secondary seal and tertiary sealed through the mode of recess and sand grip looks lock, therefore greatly improved sealing shell 1's sealing performance, make sealing shell 1's waterproof grade reach IP67 or even IP 68's level.

Referring to fig. 4 and 5, in an alternative of the present embodiment, the sealed housing 1 further includes a connecting member 20 and a connecting hole 21, the connecting hole 21 penetrates through the first housing 10 of the sealed housing 1 and extends to the second housing 11 of the sealed housing 1, a third elastic sealing layer 22 is molded around the first housing 10 corresponding to the connecting hole 21, a portion of the connecting member 20 presses the third elastic sealing layer 22 toward the side where the second housing 11 is located, and another portion of the connecting member 20 extends into the connecting hole 21 and is fixedly connected to the connecting hole 21. The portion of the connection hole 21 corresponding to the first housing 10 is connected to the connection member 20, and at the same time, the portion of the connection hole 21 corresponding to the second housing 11 is also connected to the connection member 20, so that the first housing 10 is fixedly connected to the second housing 11 through the connection member 20 and the connection hole 21.

In addition, the third elastic sealing layer 22 is pressed by the connecting piece 20, so that the connecting hole 21 is sealed by the third elastic sealing layer 22, the connecting hole 21 is prevented from being a waterproof weak point of the gas detection device 3, and the waterproof performance of the gas detection device 3 is kept at the level of IP67 or even IP 68.

Optionally, a first connection column is disposed on an inner wall of the first casing 10, a second connection column is disposed inside the second casing 11, the first connection column is connected to the second connection column, the connection hole 21 penetrates through the first connection column and extends into the second connection column, and the connection member 20 extends into the connection hole 21 and is connected to the first connection column and the second connection column respectively, so as to fixedly connect the first casing 10 to the second casing 11.

Alternatively, the number of the connection holes 21 corresponds to the number of the connection members 20, and the number of the connection holes 21 and the number of the connection members 20 are not less than two, respectively.

A third hard sealing layer 23 is further coated and molded between the third elastic sealing layer 22 and the first shell 10, and a two-layer sealing structure is formed between the connecting hole 21 and the connecting piece 20 by coating and molding the third hard sealing layer 23 between the third elastic sealing layer 22 and the first shell 10, so that the sealing performance is improved.

Alternatively, the connection hole 21 is a threaded connection hole 21, and the connection member 20 is a threaded connection member 20 such as a screw or a bolt.

In the alternative of this embodiment, the quantity of lock recess is at least one, and the quantity of lock sand grip is unanimous with the quantity of lock recess. Specifically, the total number of the fastening grooves distributed on the first casing 10, the first elastic sealing layer 12 and the first hard sealing layer 13 is at least one, and similarly, the number of the fastening convex strips distributed on the second casing 11, the second elastic sealing layer 14 and the second hard sealing layer 15 is at least one.

For example, the number of the fastening grooves is one, two or three, and the like, and correspondingly, the number of the fastening convex strips is one, two or three, and the like.

In the practical use process, due to the limitation of space and size, the number of the buckling grooves is usually limited to one or two, so that the number of the buckling grooves and the buckling convex strips can be reduced as much as possible on the premise of ensuring the sealing performance of the sealing shell 1, and the cost is effectively reduced.

Example two

The second embodiment provides a gas detection device, the second embodiment comprises the sealed shell in the first embodiment, the technical features of the sealed shell disclosed in the first embodiment are also applicable to the second embodiment, and the technical features of the sealed shell disclosed in the first embodiment are not repeated.

Fig. 6 is a schematic view of a first structure of the gas detection apparatus provided in this embodiment; fig. 4 is a second schematic structural diagram of the gas detection apparatus provided in this embodiment; fig. 8 is a schematic diagram of a third structure of the gas detection apparatus provided in this embodiment; FIG. 9 is a cross-sectional view of the gas detection assembly of FIG. 8 at D-D; FIG. 10 is a cross-sectional view of the gas detection assembly of FIG. 8 at E-E; fig. 11 is an exploded view of the seal housing and the female connector housing of the gas detection apparatus according to the present embodiment (the second housing is omitted); fig. 12 is a schematic view of an installation state of the female connector housing of the gas detection apparatus according to the present embodiment.

Referring to fig. 6 to 12 in combination with fig. 1 to 5, a gas detection apparatus 3 provided in the present embodiment includes a sealed housing 1 according to one embodiment, a waterproof gasket 38, a waterproof gas-permeable membrane 39, and a gas sensor 37 disposed in the sealed housing 1, wherein a gas inlet of the gas sensor 37 is configured to contact with an external gas, so as to measure parameters such as a type and a concentration of the gas contained in the external gas.

Be provided with ventilative mouthful 40 on the sealed casing 1, external gas can enter into gas sensor 37's inlet end through ventilative mouthful 40 to be used for detecting.

The gas inlet end of the gas sensor 37 faces the ventilation opening 40, and the gas inlet end of the gas sensor 37 is covered with a waterproof and breathable film 39. The waterproof breathable film 39 covers the air inlet end of the gas sensor 37, so that the external gas can enter the air inlet end of the gas sensor 37, and impurities such as moisture and dust are blocked by the waterproof breathable film 39, so that the sensor can be prevented from water entering.

A waterproof gasket 38 is arranged between the part of the sealed shell 1 corresponding to the ventilation port 40 and the gas sensor 37; by providing the waterproof gasket 38 between the gas sensor 37 and the seal housing 1, the gap between the gas sensor 37 and the seal housing 1 can be prevented from being filled with water.

Optionally, the waterproof breathable membrane 39 is a polymeric breathable membrane.

In an alternative of this embodiment, the gas detection device 3 further includes a waterproof buzzer 30 and a fourth elastic sealing layer 31, the waterproof buzzer 30 being disposed inside the sealed housing 1;

the sealing shell 1 is wrapped with a fourth elastic sealing layer 31, a sound through hole 32 penetrating through the fourth elastic sealing layer 31 is formed in the sealing shell 1, the part of the waterproof buzzer 30 extends into the sound through hole 32, and the fourth elastic sealing layer 31 is attached to the outer wall of the waterproof buzzer 30 along the circumferential direction of the waterproof buzzer 30.

Referring to fig. 6 to 9, water can be prevented from entering the inside of the buzzer by using the waterproof buzzer 30. The waterproof buzzer 30 has an alarm prompting function, so that the buzzing sound emitted by the waterproof buzzer is required to be released from the sealing shell 1, and the buzzing sound of the waterproof buzzer 30 can be smoothly played by arranging the sound through holes 32 on the sealing shell 1. Through the outer wall of the waterproof buzzer 30 of the circumference laminating of injecing fourth elastic sealing layer 31 along waterproof buzzer 30 to can cover waterproof buzzer 30 and lead to the clearance between the sound hole 32 by fourth elastic sealing layer 31, because fourth elastic sealing layer 31 can be tight the outer wall that gets laminating waterproof buzzer 30, therefore can effectively guarantee the waterproof performance of leading to sound hole 32 department.

Alternatively, the sound through hole 32 is provided on the second housing 11.

The gas detection device 3 that this technical scheme provided can prevent the inside water of buzzer through adopting waterproof buzzer 30, and fourth elastic sealing layer 31 can be tight the outer wall that becomes the waterproof buzzer 30 of laminating, therefore can effectively guarantee the waterproof performance who leads to sound hole 32 department. Compared with the prior art, the gas detection device 3 realizes effective water prevention at the buzzer. The waterproof level of the gas detection device 3 can be made to reach the IP67 or even TP68 level.

Referring to fig. 9, in an alternative of this embodiment, a fourth hard sealing layer 33 is further plastic-coated between the fourth elastic sealing layer 31 and the sealing housing 1, the sound through hole 32 penetrates through the fourth hard sealing layer 33, and the fourth hard sealing layer 33 and the fourth elastic sealing layer 31 are stacked, so that a double-layer seal at the sound through hole 32 is formed, and the sealing performance is further improved.

The fourth hard sealing layer 33 forms a cylinder 330 corresponding to the periphery of the sound through hole 32, and the cylinder 330 is sleeved on the periphery of the waterproof buzzer 30; a sound amplification gap is formed between the barrel 330 and the waterproof buzzer 30. Through the sleeve cover that forms the stealthy sealed layer of third establish in waterproof buzzer 30's periphery, can carry on spacingly through barrel 330 to waterproof buzzer 30 on the one hand, avoid waterproof buzzer 30 to take place to empty. On the other hand, a sound-emitting gap can be formed between the cylindrical body 330 and the outer periphery of the waterproof buzzer 30, and the buzzer sound emitted by the waterproof buzzer 30 can be made more loud and brighter.

Alternatively, the sound through hole 32 is fitted to the outer peripheral side wall of the waterproof buzzer 30.

Referring to fig. 11 and 12, in an alternative of this embodiment, the gas detection device 3 further includes a female connector seat 34, the sealing housing 1 is provided with a female seat mounting through hole 35, the female connector seat 34 is disposed in the female seat mounting through hole 35, one end of the female connector seat 34 is used for being connected to a circuit structure inside the sealing housing 1, and the other end of the female connector seat 34 is used for being matched with the connector in operation.

A filling gap 36 is formed between the connector female socket 34 and the wall surface of the seal housing 1 corresponding to the female socket mounting through hole 35, and the filling gap 36 is filled with a waterproof polymer, which is filled in the filling gap 36. Through filling waterproof polymer between avoiding of female seat 34 of connector and female seat installation through-hole 35, can play waterproof effect through waterproof polymer, through making waterproof polymer be full of filling gap 36, can guarantee that this gas detection device 3 can reach IP67 or even IP 68's level at the waterproof grade of female seat installation through-hole 35 department.

Wherein, the waterproof polymer is made of epoxy resin.

Optionally, the connector female housing 34 is a charging female housing.

In an alternative embodiment, the material of first elastic sealing layer 12, the material of second elastic sealing layer 14, and the material of third elastic sealing layer 22 are all TPE materials. The TPE material is a thermoplastic elastic material and has the characteristics of high strength, high resilience and injection molding processing. Therefore, the variability capability of the first elastic sealing layer 12, the second elastic sealing layer 14 and the third elastic sealing layer 22 in the using process can be ensured, and the plastic-coated reliability between the first elastic sealing layer 12 and the first shell 10, the plastic-coated reliability between the second elastic sealing layer 14 and the second shell 11 and the like can be ensured. Similarly, the fourth elastic sealing layer 31 is also made of TPE.

The material of the first hard sealant 13, the material of the second hard sealant 15, and the material of the third hard sealant 23 are all PC materials, and the PC material is a polycarbonate material, is a tough thermoplastic resin, has high strength and small creep, and can be formed by injection molding. Similarly, the fourth hard seal layer 33 is made of PC.

In the gas detection device 3 provided in this embodiment, by comprehensively considering the waterproofing treatment at the joint between the first housing 10 and the second housing 11, the waterproofing treatment at the joint between the connecting member 20 and the connecting hole 21, the waterproofing treatment at the buzzer, the waterproofing treatment at the gas sensor 37, and the waterproofing treatment at the mounting position of the connector female socket 34, the waterproofing critical positions of the gas detection device 3 are all subjected to appropriate waterproofing treatment, and thus the waterproofing grade of the gas detection device 3 is improved, so that the gas detection device 3 can meet the requirements of the waterproofing grade of IP67 or even IP68, and the application range of the gas detection device 3 is expanded.

The gas detection device provided in the present embodiment has the advantages of the sealed housing in the first embodiment, and the advantages of the sealed housing disclosed in the first embodiment are not described again here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Claims (10)

1. A sealed shell is characterized by comprising a first shell and a second shell, wherein a buckling groove is formed in the first shell, a buckling convex strip is formed in the second shell, and the first shell and the second shell are buckled with the buckling convex strip through the buckling groove to form the sealed shell;

and the outer surface of at least one of the buckling groove or the buckling convex strip is wrapped with an elastic sealing layer.

2. The seal casing according to claim 1, wherein the first casing is overmolded with the elastic seal layer, the second casing is overmolded with a rigid seal layer, the fastening grooves are formed in the elastic seal layer, and the fastening ribs are formed in the rigid seal layer;

or, first casing with all the package is moulded on the second casing the elastic sealing layer, the lock recess is seted up first casing on the elastic sealing layer, the lock sand grip is seted up the second casing on the elastic sealing layer.

3. The seal housing of claim 1,

a first hard sealing layer and a first elastic sealing layer are sequentially coated and molded on the first shell along the direction from inside to outside, and a second elastic sealing layer and a second hard sealing layer are sequentially coated and molded on the second shell along the direction from inside to outside;

the first hard sealing layer is provided with a first buckling groove, the second elastic sealing layer is provided with a first buckling convex strip, and the first shell and the second shell are buckled and connected through the first buckling groove and the first buckling convex strip;

and/or, be provided with second lock recess on the first elastic sealing layer, be provided with second lock sand grip on the second elastic sealing layer, first casing with the second casing passes through second lock recess with second lock recess looks lock is connected.

4. The sealing shell according to claim 3, further comprising a connecting member and a connecting hole, wherein the connecting hole penetrates through the first shell and extends to the second shell, a third elastic sealing layer is coated on the first shell corresponding to the connecting hole, part of the connecting member presses the third elastic sealing layer towards the side where the second shell is located, and the other part of the connecting member extends into the connecting hole and is fixedly connected with the connecting hole;

and a third hard sealing layer is also coated and molded between the third elastic sealing layer and the first shell.

5. The seal housing of claim 4,

the first elastic sealing layer, the second elastic sealing layer and the third elastic sealing layer are all made of TPE materials;

the first hard sealing layer, the second hard sealing layer and the third hard sealing layer are all made of PC materials.

6. The seal housing of claim 1,

the quantity of lock recess is at least one, the quantity of lock sand grip with the quantity of lock recess is unanimous.

7. A gas detection device comprising the sealed housing of any one of claims 1 to 6, a waterproof gasket, a waterproof gas-permeable membrane, and a gas sensor disposed within the sealed housing;

a ventilation opening is formed in the sealing shell, and a waterproof gasket is arranged between the sealing shell and the gas sensor corresponding to the ventilation opening;

the air inlet end of the gas sensor faces the ventilation port, and the waterproof breathable film covers the air inlet end of the gas sensor.

8. The gas detection apparatus according to claim 7, a waterproof buzzer and a fourth elastic sealing layer, the waterproof buzzer being provided inside the sealed housing;

the sealing shell is wrapped with a fourth elastic sealing layer in a plastic mode, a sound through hole penetrating through the fourth elastic sealing layer is formed in the sealing shell, the part of the waterproof buzzer stretches into the sound through hole, and the fourth elastic sealing layer is attached to the outer wall of the waterproof buzzer along the circumferential direction of the waterproof buzzer.

9. The gas detection device of claim 8, wherein a fourth rigid sealing layer is further plastic-coated between the fourth elastic sealing layer and the sealing shell, and the sound hole penetrates through the fourth rigid sealing layer;

a cylinder is formed at the position, corresponding to the periphery of the sound through hole, of the fourth hard sealing layer, and the cylinder is sleeved on the periphery of the waterproof buzzer; and a sound amplifying gap is formed between the barrel and the waterproof buzzer.

10. The gas detection apparatus according to claim 7, further comprising a female connector housing, wherein the sealed housing is provided with a female housing mounting through hole, and the female connector housing is disposed in the female housing mounting through hole;

and a filling gap is formed between the connector female seat and the wall surface of the sealing shell corresponding to the female seat mounting through hole, a waterproof polymer is filled in the filling gap, and the filling gap is filled with the waterproof polymer.

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