The utility model discloses an explosion-proof and flame-proof pressure-sensitive shell structure and a pressure-sensitive resistor, including the upper cover plate body of a glue shell, the lower shell of a glue shell and a pressure-sensitive resistor. The pins on the piezoresisors pass through the body of the cover plate on the shell. The upper cover plate of the shell and the lower shell of the shell are connected by buckle. The upper cover plate body of the shell comprises a cover plate, a first extension block, a second extension block, a third extension block and a fourth extension block, and a sliding buckle groove. The lower shell of the rubber shell includes a semi-closed container that can hold a piezoresistive, a concave position corresponding to the piezoresistive is arranged at the bottom of the semi-closed container, and a convex position corresponding to the sliding buckle groove of the second extension block and the sliding buckle groove of the fourth extension block and connected with the buckle is respectively arranged at the inner side of the semi-closed container. The inner side of the semi-closed container is respectively provided with a guide bar corresponding to the position of the first extension block, the second extension block, the third extension block and the fourth extension block. The utility model has the advantages of simple structure, stable and firm structure and safety.

1. An explosion-proof and combustion-proof pressure-sensitive shell structure, including the upper cover plate of the shell and the lower shell of the shell, is characterized by a buckle connection between the upper cover plate of the shell and the lower shell of the shell;

The upper cover plate body of the colloidal shell includes a cover plate covered on the lower shell of the colloidal shell. The first extension block, the second extension block, the third extension block and the fourth extension block embedded in the lower shell of the colloidal shell are respectively spaced on the inner side of the cover plate.

The lower shell of the rubber shell comprises a semi-closed container, a concave position is arranged at the bottom of the semi-closed container, and a convex position corresponding to the sliding buckle groove of the second extension block and the sliding buckle groove of the fourth extension block respectively and connected with the buckle is arranged at the inner side of the semi-closed container.

The inner side of the semi-closed container is respectively provided with a guide bar corresponding to the position of the first extension block, the second extension block, the third extension block and the fourth extension block.

2. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell described in claim 1, the characteristic is that the number of the guide bars is four, and the four guide bars are respectively corresponding to the spacing position between the first extension block, the second extension block, the third extension block and the fourth extension block; The four guides are parallel to each other.

3. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell described in claim 2, the feature is that the convex part is provided with a sliding guide ramp connected with the buckle of the sliding buckle groove; The second extension block and the fourth extension block above the sliding buckle groove are respectively connected with the sliding guide ramp and the leading concave ramp connected with the leading convex clip buckle; The convex is corresponding to the shape and size of the sliding buckle groove.

4. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell described in claim 2, the characteristics of which are that the first and third extension blocks are u-shaped blocks; The second extension block and the fourth extension block are both square blocks.

5. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell mentioned in claim 1, the first extension block and the third extension block are located on opposite sides of the inner side of the cover plate; The first extension block and the third extension block are respectively provided with sliding buckle grooves; The inner side of the semi-closed container is respectively provided with a projection corresponding to the sliding buckle groove position of the first extension block and the sliding buckle groove position of the third extension block and connected with the buckle; The first extension block 12 and the third extension block 14 have angular symmetric structures; The second extension block 13 and the fourth extension block 15 have angular symmetric structures.

6. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell described in claim 5, its characteristics lie in that the guide bar is four and the guide bars are parallel to each other; The four guide bars are respectively opposite to the corresponding convex; There is a space between the guide bar and the bump.

7, according to claim 6 a kind of explosion-proof type flameproof pressure-sensitive shell structure, its characteristics is described in the article directs and bumps on the distance between the stated is described in the first extension on the sliding clasp slot with the first piece of the distance between the top surface, is equal to the second extension on the sliding clasp slot with the second piece of the distance between the top surface, extension is equal to the third block sliding buckle groove and third extension block, the distance between the top surface is equal to the fourth extension on the sliding clasp slot with the fourth extended piece of the distance between the top surface.

8. According to the structure of the explosion-proof and flame-proof pressure-sensitive shell described in claim 5, the feature is that the convex part is provided with a sliding guide slope connected with the buckle of the sliding buckle groove.

9. The utility model relates to an explosion-proof and combustion-proof pressure-sensitive resistor, which is characterized in that it includes the upper cover plate body of a rubber shell and the lower shell of a rubber shell, and the pressure-sensitive resistor encapsulated in the upper cover plate of a rubber shell and the lower shell of a rubber shell.

The upper cover plate body of the colloidal shell includes a cover plate covered on the lower shell of the colloidal shell. The first extension block, the second extension block, the third extension block and the fourth extension block embedded in the lower shell of the colloidal shell are respectively spaced on the inner side of the cover plate.

The lower shell of the rubber shell includes a semi-closed container that can accommodate a piezoresistive, a concave position corresponding to the piezoresistive is arranged at the bottom of the semi-closed container, and a convex position corresponding to the sliding buckle groove of the second extension block and the sliding buckle groove of the fourth extension block and the buckle is connected at the inner side of the semi-closed container.

The inner side of the semi-closed container is respectively provided with a guide bar corresponding to the position of the first extension block, the second extension block, the third extension block and the fourth extension block.

10. According to the explosion-proof and flame-proof piezoresisors mentioned in claim 9, the characteristics of the piezoresisors are that the piezoresisors are encapsulated in the upper cover plate of the shell and the lower shell of the shell by colloid.

Explosion-proof and flame-proof pressure-sensitive shell structure and pressure-sensitive resistance

Technical field

   The utility model relates to the technical field of electronic components, in particular to an explosion-proof and flame-proof pressure-sensitive shell structure and a pressure-sensitive resistor.

Technical background

At present, the explosion-proof and flame-proof piezoresistive elements applied in the market are mainly composed of the pressure-sensitive body put into the explosion-proof shell and the flame-retardant filler material. If the piezoresistive element fails to explode and burn, it can only prevent the piezoresistive element from causing open fire, debris splash and other safety hazards in the process of explosion by means of flame-retardant filler material and explosion-proof shell. At the same time, it can also avoid the failure of piezoresistive elements, will not affect the normal use of other electronic components in the equipment. However, the existing piezoresistive element shell packaging, upper and lower is liquid glue packaging, the structure of the poor firmness.

Utility model content

In view of the deficiencies of the prior art, the present invention provides an explosion-proof and flame-proof type pressure sensitive housing structure and a varistor.

The explosion-proof and flameproof pressure sensitive housing structure disclosed by the utility model comprisesThe upper cover body of the plastic shell and the lower shell of the plastic shell, the snap-on connection between the upper cover of the plastic shell and the lower shell of the plastic shell；

The upper cover body of the plastic case comprises a cover plate covering the lower case of the plastic case, and the first extension block, the second extension block, the third extension block and the first extension block embedded in the lower case of the plastic case are respectively arranged on the inner side of the cover plate. a fourth extension block, and a sliding groove provided on each of the second extension block and the fourth extension block opposite to each other；

The lower casing of the plastic shell comprises a semi-closed container, a concave position is arranged at the bottom of the semi-closed container, and a sliding groove position of the second extending block and a sliding groove groove on the fourth extending block are respectively disposed inside the semi-closed container. Positionally corresponding and snap-fit projections；

The inner side of the semi-closed container is respectively provided with guide strips corresponding to the positions of the first extension block, the second extension block, the third extension block and the fourth extension block.

According to an embodiment of the present invention, the number of the guiding strips is four, and the four guiding strips respectively correspond to the spacing positions between the first extending block, the second extending block, the third extending block and the fourth extending block; Four guides are parallel to each other.

According to an embodiment of the present invention, the protrusion is provided with a sliding guiding slope connected to the sliding slot; the second extending block and the fourth extending block above the sliding slot are respectively matched with the sliding guiding inclined surface to guide the convex card The guiding concave slope of the buckle connection; the shape and size of the protrusion and the sliding groove corresponding.

According to an embodiment of the present invention, the first extension block and the third extension block are bothUThe second extension block and the fourth extension block are square blocks.

According to an embodiment of the present invention, the first extension block and the third extension block are located on opposite sides of the inner side surface of the cover plate; the first extension block and the third extension block are respectively provided with sliding buckle grooves; a protrusion corresponding to the position of the sliding slot of the first extension block and the position of the sliding slot on the third extension block and being snap-connected;First extension block12And the third extension block14An angular symmetrical structure; a second extension block13And the fourth extension block15Angular symmetric structure.

According to an embodiment of the present invention, the guide strips are four, and the guides of the four strips are parallel to each other; the four guide strips are respectively opposite to the corresponding protrusions; and a space is provided between the guide strips and the protrusions.

According to an embodiment of the present invention, the distance between the guide strip and the protrusion is equal toThe distance between the sliding groove of the first extension block and the top surface of the first extension block is equal to the distance between the sliding groove of the second extension block and the top surface of the second extension block, which is equal to the sliding groove of the third extension block. The distance from the top surface of the third extension block is equal to the distance between the slider groove on the fourth extension block and the top surface of the fourth extension block.

According to an embodiment of the present invention,a sliding guiding slope connected to the slider groove is provided on the protrusion。

An explosion-proof and flameproof varistor comprises a rubber shell upper cover body and a rubber shell lower shell, and a varistor packaged in the rubber shell upper cover and the plastic shell lower shell, and the pin on the varistor The upper cover of the plastic shell is pierced, and the upper cover of the plastic shell and the lower shell of the plastic shell are buckled;；

The upper cover body of the plastic case comprises a cover plate covering the lower case of the plastic case, and the first extension block, the second extension block, the third extension block and the first extension block embedded in the lower case of the plastic case are respectively arranged on the inner side of the cover plate. a fourth extension block, and a sliding groove provided on each of the second extension block and the fourth extension block opposite to each other；

The lower case of the plastic case comprises a semi-closed container accommodating the varistor, a concave position corresponding to the varistor is arranged at the bottom of the semi-closed container, and a sliding buckle corresponding to the second extended block is respectively arranged inside the semi-closed container The position of the groove and the position of the sliding groove on the fourth extension block are corresponding and the protrusion of the buckle connection；

The inner side of the semi-closed container is respectively provided with guide strips corresponding to the positions of the first extension block, the second extension block, the third extension block, and the fourth extension block.

According to an embodiment of the present invention，The varistor is encapsulated in the upper cover of the plastic case and the lower case of the plastic case.

The explosion-proof and flameproof pressure-sensitive housing structure of the present application,Due to the internal snap-in structure between the upper cover of the plastic case and the lower case of the plastic case,The one-way fastener is fastened into the package by a snap fastener, and the sealing effect is good after the buckle-in, and the irreversible removal is achieved, thereby achieving a stable and firm structure; and the entire packaging process is firstly extended by the first extension block, the second extension block, and the third The extension block and the fourth extension block are embedded in the lower casing of the plastic shell. Under the guiding action of the guiding strip, the sliding guiding inclined surface contacts the guiding concave inclined surface to slide, and finally the protrusion is buckled into the sliding buckle groove. The overall structure guides the combination with the snap structure and the structure is very simple. Due to the combination of the upper cover of the plastic case and the lower case of the plastic case, the safety of the open-type varistor element in the process of explosion can be avoided.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a schematic structural view of an explosion-proof flameproof varistor in Embodiment 1;

2 is a schematic exploded view of the explosion-proof flameproof varistor of Embodiment 1;

3 is a schematic structural view of a lower case of a plastic case of an explosion-proof flameproof varistor in Embodiment 1;

4 is a schematic structural view of another perspective view shown in FIG. 3 in Embodiment 1;

Figure 5 is a schematic exploded view of the explosion-proof flameproof varistor of Embodiment 2;

6 is a schematic structural view of a middle rubber shell lower case of an explosion-proof flameproof varistor in Embodiment 2;

FIG. 7 is a schematic structural view of another perspective view shown in FIG. 6 in Embodiment 2.

Detailed ways

In the following, various embodiments of the invention are disclosed in the drawings. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, some of the conventional structures and components are shown in the drawings in a simplified schematic representation in order to simplify the drawings.

It should be noted that all directional indications such as up, down, left, right, front, and rear in the embodiment of the present invention are only used to explain the relative positional relationship between components in a certain posture as shown in the drawing. , the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions of "first", "second" and the like in the present invention are used for descriptive purposes only, and are not intended to specifically refer to the order or order, and are not intended to limit the present invention, but merely for the purpose of The components or operations described in the same technical terms are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

In order to further understand the contents, features and functions of the utility model, the following embodiments are exemplified and described in detail with reference to the accompanying drawings:

Example 1:

As shown in FIG. 1-4, an explosion-proof flame-proof varistor includes a rubber shell upper cover body 01 and a rubber shell lower casing 02, and a plastic shell upper cover body 01 and a plastic shell lower casing 02. The varistor 03 of the inner package, the pin on the varistor 03 is passed out from the upper cover body 01. There is a snap connection between the upper cover body 01 of the plastic case and the lower case 02 of the plastic case.

The cover plate body 01 includes a cover plate 11 that is disposed on the lower case 02 of the plastic case, and a first extension block 12 embedded in the lower case 02 of the plastic case is respectively spaced apart on four sides of the inner side surface of the cover plate 11 The second extension block 13, the third extension block 14 and the fourth extension block 15, and the second extension block 13 and the fourth extension block 15 opposite to each other are respectively provided with a sliding groove 17 .

The lower case 02 of the plastic case includes a semi-closed container 21 accommodating the varistor 03, a recess 22 corresponding to the varistor 03 is provided at the bottom of the semi-closed container 21, and a recess 22 is provided inside the semi-closed container 21, respectively. The position of the sliding groove 17 of the second extension block 13 is corresponding to the position of the sliding groove 17 on the fourth extension block 15 and the protrusion 23 of the buckle connection. The inner side of the semi-closed container 21 is provided with guide bars 25 corresponding to the spaced positions between the first extension block 12, the second extension block 13, the third extension block 14, and the fourth extension block 15, respectively. The protrusion 23 is provided with a sliding guide slope 24 that is snap-connected to the slider groove 17. The second extension block 13 and the fourth extension block 15 above the slider groove 17 are respectively engaged with the guide guide slope 24 to guide the projection concave portion 16 of the guide protrusion 23. The projection 23 corresponds to the shape and size of the slider groove 17.

More preferably, the first extension block 12 and the third extension block 14 are both U-shaped blocks; the second extension block 13 and the fourth extension block 15 are both square blocks. The guide strips 25 spaced apart between the first extension block 12, the second extension block 13, the third extension block 14, and the fourth extension block 15 are four, and the four guides are parallel to each other.

The entire encapsulation process is first embedded in the lower casing 02 by the first extension block 12, the second extension block 13, the third extension block 14, and the fourth extension block 15, and guided by the guide bar 25, the guide bevel is guided. The slider 24 is in contact with the guide concave slope 16 and finally the projection 23 is snapped into the slider groove 17.

More preferably, the varistor 03 is encapsulated in the cover plate 01 and the lower case 02 of the plastic case by a colloid. The colloid is specifically a liquid glue, and the second package is filled by the liquid glue to further increase the cover of the plastic case. The stability of the connection between the 01 and the lower case 02 of the plastic case, and the upper cover plate 01 and the lower case 02 of the plastic case and the varistor 03, respectively.

Example 2:

As shown in FIG. 5-7, another explosion-proof flame-proof varistor includes a rubber shell upper cover body 01 and a rubber shell lower shell 02, and a rubber shell upper cover body 01 and a rubber shell lower shell. The varistor 03 of the package is 02, and the pin on the varistor 03 is passed out from the upper cover body 01. There is a snap connection between the upper cover body 01 of the plastic case and the lower case 02 of the plastic case.

The cover plate body 01 includes a cover plate 11 that is disposed on the lower case 02 of the plastic case, and a first extension block 12 embedded in the lower case 02 of the plastic case is respectively spaced apart from the four corners of the inner side surface of the cover plate 11 a second extension block 13, a third extension block 14 and a fourth extension block 15, and a sliding groove 17 respectively provided on the second extension block 13 and the fourth extension block 15 opposite to each other, and on opposite sides The first extension block 12 and the third extension block 14 are respectively provided with slider grooves 17 respectively. The second extension block 13 and the fourth extension block 15 have an angular symmetrical structure, and the first extension block 12 and the third extension block 14 have an angular symmetrical structure.

The lower case 02 of the plastic case includes a semi-closed container 21 accommodating the varistor 03, a recess 22 corresponding to the varistor 03 is provided at the bottom of the semi-closed container 21, and a recess 22 is provided inside the semi-closed container 21, respectively. The position of the slider groove 17 of the first extension block 12, the position of the slider groove 17 of the second extension block 13, the slider groove 17 on the third extension block 14, and the slider groove 17 on the fourth extension block 15 are correspondingly The tabs 23 of the snap connection. The inside of the semi-closed container 21 is provided with guide strips 25 corresponding to the positions of the projections 23, respectively. The protrusion 23 is opposite to the end of the guiding strip 25; there is a space 26 between the protrusion 23 and the guiding strip 25; the distance between the protrusion 23 and the guiding strip 25 is equal to the sliding groove on the first extending block 12 The distance between the top surface of the first extension block 12 and the top surface of the second extension block 13 is equal to the distance between the top surface of the second extension block 13 and the top surface of the second extension block 13, which is equal to the slider groove 17 on the third extension block 14 The distance between the top surfaces of the third extension block 14 is equal to the distance between the slider groove 17 of the fourth extension block 15 and the top surface of the fourth extension block 15.

The protrusion 23 is provided with a sliding guide slope 24 that is snap-connected to the slider groove 17.

More preferably, the first extension block 12, the second extension block 13, the third extension block 14, and the fourth extension block 15 are all L-shaped blocks; the four guide strips 25 corresponding to the positions of the four protrusions 23 are parallel to each other.

The entire packaging process is first embedded in the lower housing 02 by the first extension block 12, the second extension block 13, the third extension block 14, and the fourth extension block 15, and the sliding guide slopes 24 of the four protrusions 23 are respectively The portion of the first extension block 12 on the first extension block 12 is in contact with the top surface of the first extension block 12, and the portion of the second extension block 13 is in contact with the top surface of the second extension block 13 a portion of the third extension block 14 between the slider groove 17 and the top surface of the third extension block 14 is slid, and the portion between the slider groove 17 and the top surface of the fourth extension block 15 on the fourth extension block 15 Contact sliding; finally, the four protrusions 23 are snapped into the four sliding groove 17; moreover, the portion between the sliding groove 17 of the first extending block 12 and the top surface of the first extending block 12, the second extending block A portion between the upper sliding groove 17 and the top surface of the second extending block 13 , a portion between the sliding groove 17 of the third extending block 14 and the top surface of the third extending block 14 , and the fourth extending block 15 is slid The portion between the buckle groove 17 and the top surface of the fourth extension block 15 is snapped into the space 26 between the projection 23 and the guide strip 25.

More preferably, the varistor 03 is encapsulated in the cover plate 01 and the lower case 02 of the plastic case by a colloid. The colloid is specifically a liquid glue, and the second package is filled by the liquid glue to further increase the cover of the plastic case. The stability of the connection between the 01 and the lower case 02 of the plastic case, and the upper cover plate 01 and the lower case 02 of the plastic case and the varistor 03, respectively.

The above is only an embodiment of the present invention and is not intended to limit the present invention. Various modifications and changes may be made to the inventions. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.