Anti-explosion and anti-corrosion button

Abstract

An anti-explosion and anti-corrosion button comprises an insulating shell, a pressing assembly and a first sealing piece, a stepped hole is axially formed in the insulating shell in a penetrating mode, the stepped hole comprises a first hole section, a second hole section and a third hole section, the diameters of the first hole section, the second hole section and the third hole section are sequentially reduced, the pressing assembly comprises a pressing cover, a button feeler lever and an elastic piece, and the pressing cover is in sliding connection fit with the first hole section. The button feeler lever is in sliding connection fit with the third hole section and is in fastening connection fit with the pressing cover, an explosion-proof joint face is further formed between the button feeler lever and the third hole section, the elastic piece is arranged in the second hole section in a limited mode, the top end of the elastic piece acts on the button feeler lever, and the inner edge of the first sealing piece is tightly fixed to a lower inserting hole of the pressing cover in a sleeving mode. And the outer edge of the first sealing piece is tightly fixed at the first hole section. According to the utility model, corrosion gas is effectively prevented from invading, the explosion problem caused by dust in external gas entering the equipment from gaps is effectively avoided, and the use is safe.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof electrical equipment technology, and in particular to an explosion-proof and corrosion-resistant button. Background Technology

[0002] A button is an electrical component that uses a transmission mechanism to open or close a circuit by pressing a moving contact against a stationary contact. Buttons are simple in structure and widely used control devices. In electrical automatic control circuits, they are used to manually send control signals to control contactors, relays, electromagnetic starters, etc. Buttons mainly consist of a button cap, a return spring, and a housing. Common buttons do not require strong sealing during operation. However, buttons used in dusty environments require stronger sealing; weak sealing in dusty environments can easily lead to an explosion hazard. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device with strong sealing performance, which can effectively prevent the entry of external gas and effectively avoid the explosion problem caused by dust in the external gas entering the equipment through gaps, and uses safe explosion-proof and corrosion-resistant buttons.

[0004] The technical solution adopted by this utility model to solve its technical problem is an explosion-proof and corrosion-resistant button. The button is sealed on a panel and includes an insulating shell, a pressing assembly, and a first sealing element. A stepped hole is axially provided on the insulating shell. The stepped hole includes a first segment, a second segment, and a third segment. The first segment and the third segment are located at opposite ends. The second segment connects the first segment and the third segment. The diameters of the first segment, the second segment, and the third segment decrease sequentially. The pressing assembly... The component includes a press cover, a button rod, and an elastic element. The press cover is slidably connected to the first hole segment, the button rod is slidably connected to the third hole segment, and the button rod is tightly connected to the press cover. An explosion-proof mating surface is also formed between the button rod and the third hole segment. The elastic element is limited within the second hole segment, and the top end of the elastic element acts on the button rod. The inner edge of the first sealing element is tightly fitted onto the lower insertion hole of the press cover, and the outer edge of the first sealing element is tightly fixed at the first hole segment.

[0005] The advantages of the above technical solution are as follows: The sliding fit between the first hole section and the press cover, and the sliding fit between the third hole section and the button contact rod, ensure smooth movement of the button contact rod under force, reliably triggering the explosion-proof switch to achieve internal circuit switching. The second hole section limits the position of the elastic element, ensuring smooth reset movement of the button contact rod. Simultaneously, the explosion-proof joint surface isolates external gases from entering, effectively preventing dust from entering the explosion-proof switch through the gap between the button contact rod and the third hole section, thus improving the explosion-proof performance between the button contact rod and the insulating housing. The first sealing element enhances the overall sealing of the device, effectively preventing the intrusion of corrosive gases and making it safer to use. Furthermore, the separate structure of the press cover and button contact rod allows for the application of different materials and processing techniques according to the requirements of different parts, resulting in a more rational structural design.

[0006] Furthermore, the insulating housing includes an insulating bottom shell and an insulating top shell. The lower part of the first hole segment, as well as the second hole segment and the third hole segment, are formed on the insulating bottom shell. The upper part of the first hole segment is formed on the insulating top shell. An external thread is also formed on the outer peripheral wall of the upper end of the insulating bottom shell, and an internal thread is also formed on the inner peripheral wall of the insulating top shell. The internal thread and the external thread cooperate with each other.

[0007] The advantages of the above technical solution are as follows: During installation, after the press cover and the button contact rod are fixedly connected, the first sealing element is then fixed to the lower part of the press cover. Therefore, the insulating housing adopts an assembly structure of an insulating bottom shell and an insulating cover shell, which makes the lower and upper parts of the first hole section separate, thus facilitating the tight fixing and cooperation between the first sealing element and the lower part of the first hole section. At the same time, the insulating bottom shell and the insulating cover shell are fixed by the cooperation of the external thread and the internal thread, which makes installation and disassembly convenient and the structural design is reasonable.

[0008] Furthermore, the first sealing element includes a sealing ring platform and a sealing ring skirt connected sequentially from the inside out. The sealing ring platform is tightly fitted onto the lower peripheral wall surface of the press cover. The top of the inner wall surface of the sealing ring platform is also provided with a first sealing lip in a circumferential direction. The inner end of the sealing ring skirt has an arc-shaped concave structure and is connected to the bottom outer peripheral wall surface of the sealing ring platform. The outer end of the sealing ring skirt has a straight structure and is pressed onto the upper end surface of the insulating bottom shell through the insulating cover. The outer edges of the upper and lower surfaces of the sealing ring skirt are also provided with a second sealing lip in a circumferential direction.

[0009] The advantages of the above technical solution are as follows: The first sealing element is fixed to the lower part of the press cover by a sealing ring platform with a first sealing lip, which makes the sealing connection between the sealing element and the press cover effective. After the button contact rod and the third hole section are assembled in place, the outer end of the sealing ring skirt with a second sealing lip is pressed by the installation of the insulating cover, which makes the sealing connection between the sealing element and the upper end of the insulating bottom shell effective. Therefore, the first sealing element achieves a good sealing effect. Moreover, the inner end of the sealing ring skirt has an arc concave structure. The first sealing element with this structure can make the sliding of the button contact rod and the press cover reasonable.

[0010] Furthermore, a first mounting ring groove is formed at a corresponding position on the lower peripheral wall surface of the pressing cover, and a second mounting ring groove is formed at a corresponding position on the upper end surface of the insulating bottom shell. The first mounting ring groove cooperates with the first sealing lip, and the second mounting ring groove cooperates with the second sealing lip on the lower side.

[0011] The advantages of the above technical solution are: by setting a first mounting ring groove that mates with the first sealing lip and a second mounting ring groove that mates with the lower second sealing lip, the installation of the first seal is more stable, ensuring sealing performance.

[0012] Furthermore, the outer peripheral wall of the insulating base shell is provided with a third mounting ring groove below the external thread portion. The third mounting ring groove is used to install the second seal. A support ring block is also provided at the connection between the first hole segment and the second hole segment. The top of the inner wall of the support ring block is set as an inclined surface.

[0013] The advantages of the above technical solution are as follows: by setting a third mounting ring groove, the second sealing element can be installed, thereby achieving a seal between the insulating bottom shell and the mounting panel. Furthermore, by setting a support ring block, the strength of the insulating bottom shell is improved. By setting the top of the inner wall of the support ring block as a slope, the first sealing element is avoided when it moves downward with the pressing cover and button rod, thus preventing damage to the first sealing element. The structural design is reasonable.

[0014] Furthermore, the button also includes a first limiting member and a second limiting member disposed on both sides of the third hole segment. The first limiting member is detachably installed at the corresponding position at the lower end of the button contact rod, and the second limiting member is integrally formed at the corresponding position at the upper end of the button contact rod. The top end of the elastic member acts on the second limiting member.

[0015] The advantages of the above technical solution are as follows: By setting the first limiting component, the upward sliding position of the button contact rod is limited, preventing the button contact rod from coming off under the action of the elastic component. By setting the second limiting component, the top of the elastic component acts on the button contact rod, ensuring the firmness of the installation of the button contact rod and the press cover. The structure is reasonably designed and the performance is good. Furthermore, setting the first limiting component to be detachable and the second limiting component to be integrated makes the installation sequence of the components reasonable.

[0016] Furthermore, a fourth mounting ring groove is provided at the corresponding position of the lower end of the button contact rod, and the first limiting member is engaged with the fourth mounting ring groove. The lower part of the pressing cover is also provided with a fifth mounting ring groove surrounding the insertion hole, and the second limiting member is fitted with the fifth mounting ring groove.

[0017] The advantages of the above technical solution are: by setting a fourth mounting ring groove to cooperate with the first limiting member, the installation of the first limiting member is more secure; by setting a fifth mounting ring groove to cooperate with the second limiting member, the installation of the press cover and the button contact rod is more secure; and the structural design is reasonable.

[0018] Furthermore, the button also includes a mounting base, which is detachably connected to the lower end of the insulating housing, and the mounting base is provided with a connection structure for fixing to the explosion-proof switch.

[0019] The advantages of adopting the above technical solution are: by setting a fixed base with a connection structure, it is convenient to install the button and the explosion-proof switch, and in the event of button damage, the button can be quickly removed for repair or replacement. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the structure of this utility model in conjunction with an explosion-proof switch;

[0021] Figure 2 This is a cross-sectional view of the insulating bottom shell and insulating top shell of this utility model;

[0022] Figure 3 This is a cross-sectional view of the first sealing element structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the button contact rod structure of this utility model;

[0024] Figure 5 This is a cross-sectional view of the press cap structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the fixing base structure of this utility model.

[0026] In the figure: 1-Insulating shell, 2-First seal, 3-First hole section, 4-Second hole section, 5-Third hole section, 6-Press cover, 7-Button contact rod, 8-Elastic element, 9-Explosion-proof mating surface, 10-Insulating bottom shell, 11-Insulating cover shell, 12-External threaded part, 13-Internal threaded part, 14-Sealing ring platform, 15-Sealing ring skirt, 16-First sealing lip, 17-Second sealing lip, 18-First mounting ring groove, 19-Second mounting ring groove, 20-Third mounting ring groove, 21-Supporting ring block, 22-First limiting element, 23-Second limiting element, 24-Fourth mounting ring groove, 25-Fifth mounting ring groove, 26-Fixed base, 27-Connecting structure. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0028] Please see Figures 1 to 6As shown, an explosion-proof and corrosion-resistant button is installed on a panel. More specifically, an explosion-proof sealing structure is provided between the button and the panel. The button includes an insulating housing 1, a pressing assembly, and a first sealing element 2. The insulating housing 1 has a stepped hole axially extending through it. The stepped hole includes a first hole segment 3, a second hole segment 4, and a third hole segment 5. The first hole segment 3 and the third hole segment 5 are located at both ends. The second hole segment 4 is used to connect the first hole segment 3 and the third hole segment 5, and the diameters of the first hole segment 3, the second hole segment 5, and the third hole segment 5 decrease sequentially. The pressing assembly includes a pressing cover 6, a button contact rod 7, and... The elastic element 8, which can be a spring, is slidably connected to the first hole section 3 of the press cover 6. The button contact rod 7 is slidably connected to the third hole section 5, and the upper end of the button contact rod 7 is fastened to the lower part of the press cover 6. Through the sliding connection between the first hole section 3 and the press cover 6, and the sliding connection between the third hole section 5 and the button contact rod 7, the press cover 6 can be forced to move the button contact rod 7 downwards smoothly, stably triggering the explosion-proof switch to realize the internal circuit conversion. The elastic element 8 is limited within the second hole section 4, and the top end of the elastic element 8 acts on the button contact rod 7. The button contact rod 7 moves downwards with the press. During the downward movement of the cover 6, the elastic element 8 is compressed and accumulates elastic potential energy. When the force ends, the elastic potential energy causes the button contact rod 7 and the cover 6 to reset. Therefore, the setting of the second hole section 4 limits the position of the elastic element 8, making the reset movement of the button contact rod 7 driven by the elastic element 8 smooth. An explosion-proof joint surface 9 is also formed between the button contact rod 7 and the third hole section 5. The setting of the explosion-proof joint surface 9 isolates the entry of external gas, effectively preventing dust in the external gas from entering the explosion-proof switch through the gap between the button contact rod 7 and the third hole section 5 and causing an explosion. This improves the safety of the button contact rod. The explosion-proof performance between the button spool 7 and the insulating housing 1 is achieved by the inner edge of the first sealing element 2 being tightly fitted onto the lower insertion hole of the press cover, and the outer edge of the first sealing element 2 being tightly fixed at the first hole section 3. The first sealing element 2 achieves a seal between the press cover 6 and the insulating housing 1, effectively preventing the intrusion of corrosive gases, making the entire device more airtight and safer to use. In addition, the above structure adopts a split structure of the press cover 6 and the button spool 7, so the press cover 6 and the button spool 7 can be made of different materials and different processing technology according to the usage requirements of different parts, making the structural design more reasonable.

[0029] In this embodiment, the insulating housing 1 includes an insulating bottom shell 10 and an insulating top shell 11. The lower part of the first hole segment 3, as well as the second hole segment 4 and the third hole segment 5, are formed on the insulating bottom shell 10, and the upper part of the first hole segment 3 is formed on the insulating top shell 11. During installation, after the press cover 6 and the button contact rod 7 are fixedly connected, the first sealing member 2 is then fitted onto the lower part of the press cover 6. Therefore, the insulating housing 1 adopts an assembly structure of the insulating bottom shell 10 and the insulating top shell 11, which makes the lower and upper parts of the first hole segment 3 separate, thereby reducing the length of the first hole segment 3 and facilitating the tight fixing and fitting of the first sealing member 2 with the lower part of the first hole segment 3.

[0030] In this embodiment, an external thread 12 is formed on the upper outer peripheral wall of the insulating bottom shell 10, and an internal thread 13 is formed on the inner peripheral wall of the insulating cover shell 11. The internal thread 13 cooperates with the external thread 12, and the insulating bottom shell 10 and the insulating cover shell 11 are fixed by the cooperation of the external thread 12 and the internal thread 13. The installation and disassembly are also convenient, and the structural design is reasonable.

[0031] In this embodiment, the first sealing element 2 includes a sealing ring platform 14 and a sealing ring skirt 15 connected sequentially from the inside to the outside. The sealing ring platform 14 is tightly fitted onto the lower peripheral wall of the press cover 6. A first sealing lip 16 is also provided circumferentially at the top of the inner wall of the sealing ring platform 14. The inner end of the sealing ring skirt 15 has an arc-shaped concave structure and is connected to the bottom outer peripheral wall of the sealing ring platform 14. The outer end of the sealing ring skirt 15 has a straight structure and is pressed onto the upper end surface of the insulating bottom shell 10 through the insulating cover shell 11. A second sealing lip 17 is also provided circumferentially at the outer edges of the upper and lower surfaces of the sealing ring skirt 15. The sealing ring 14 with the first sealing lip 16 is fixed to the lower part of the press cover 6, so that the sealing connection between the sealing ring 14 and the press cover 6 is good. After the button contact rod 7 and the third hole section 5 are assembled in place, the outer end of the sealing ring skirt 15 with the second sealing lip 17 is pressed by the installation of the insulating cover 11, so that the sealing connection between the sealing ring skirt 15 and the upper end of the insulating bottom shell 10 is good. Therefore, the first sealing element 2 achieves a good sealing effect. The inner end of the sealing ring skirt 15 is an arc concave structure. The first sealing element 2 with this structure can make the sliding of the button contact rod 7 and the press cover 6 reasonable.

[0032] In this embodiment, a first mounting groove 18 is formed at a corresponding position on the lower peripheral wall of the pressing cover 6, and a second mounting groove 19 is formed at a corresponding position on the upper end surface of the insulating bottom shell 10. The first mounting groove 18 cooperates with the first sealing lip 16, and the second mounting groove 19 cooperates with the lower second sealing lip 17. By setting the first mounting groove 18 that cooperates with the first sealing lip 16 and the second mounting groove 19 that cooperates with the lower second sealing lip 17, the position of the first sealing element 2 can be effectively limited, making the installation of the first sealing element 2 more stable and ensuring the sealing performance.

[0033] In this embodiment, a third mounting ring groove 20 is provided on the outer peripheral wall of the insulating base shell 10 below the external thread portion 12. The third mounting ring groove 20 is used to install the second sealing element. By setting the third mounting ring groove 20, the installation of the second sealing element is realized, thereby achieving a seal between the insulating base shell 10 and the mounting panel. Since the third mounting ring groove 20 is set and is located at the lower part of the first hole segment 3, a support ring block 21 is also provided at the connection between the first hole segment 3 and the second hole segment 4. By setting the support ring block 21, the strength of the insulating base shell 10 is improved. The top of the inner wall of the support ring block 21 is set as an inclined surface. Setting the top of the inner wall of the support ring block 21 as an inclined surface achieves the purpose of avoiding the first sealing element 2 when it moves downward with the pressing cover 6 and the button contact rod 7, thus avoiding damage to the first sealing element 2. The structural design is reasonable.

[0034] In this example, the button also includes a first limiting member 22 and a second limiting member 23 arranged on both sides of the third hole segment 5. The first limiting member 22 is detachably installed at the corresponding position at the lower end of the button contact rod 7, and the second limiting member 23 is integrally formed at the corresponding position at the upper end of the button contact rod 7. The top end of the elastic member 8 acts on the second limiting member 23. More specifically, the first limiting member 22 is used to limit the bottom of the insulating base 10. By setting the first limiting member 22, the first limiting member 22 realizes the position limit of the upward sliding of the button contact rod 7, avoiding the phenomenon of the button contact rod 7 being dislodged under the action of the elastic member 8. By setting the second limiting member 23, the purpose of the top end of the elastic member 8 acting on the button contact rod 7 is realized, ensuring the installation of the button contact rod 7 and the pressing cover 6 firmly. The structural design is reasonable and the use effect is good. Moreover, the first limiting member 22 is made detachable and the second limiting member 23 is made integral, so that the installation sequence of the components is reasonable.

[0035] In this example, a fourth mounting groove 24 is provided at the corresponding position of the lower end of the button contact rod 7. The first limiting member 22 is locked in place with the fourth mounting groove 24. The lower part of the press cover 6 is also provided with a fifth mounting groove 25 surrounding the insertion hole. The second limiting member 23 is fitted into the fifth mounting groove 25. By setting the fourth mounting groove 24 to cooperate with the first limiting member 22, the installation of the first limiting member 22 is more secure. By setting the fifth mounting groove 25 to cooperate with the second limiting member 23, the installation of the press cover 6 and the button contact rod 7 is more secure. The structural design is reasonable.

[0036] In this embodiment, the button also includes a mounting base 26, which is detachably connected to the lower end of the insulating housing 1. The mounting base 26 is provided with a connection structure 27 for fixing to the explosion-proof switch. The connection structure can be a locking block that cooperates with the slots on both sides of the top of the explosion-proof switch. By providing a mounting base 26 with a connection structure 27, it is convenient to install the button and the explosion-proof switch. In the event of button damage, the button can be quickly removed for repair or replacement.

[0037] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An explosion-proof and corrosion-resistant button, wherein the button is sealed and mounted on a panel, characterized in that: The button includes an insulating housing (1), a pressing assembly, and a first sealing element (2). The insulating housing (1) has an axially extending stepped hole, which includes a first hole segment (3), a second hole segment (4), and a third hole segment (5). The first hole segment (3) and the third hole segment (5) are positioned at opposite ends. The second hole segment (4) connects the first hole segment (3) and the third hole segment (5). The diameters of the first hole segment (3), the second hole segment (4), and the third hole segment (5) decrease sequentially. The pressing assembly includes a pressing cover (6), a button contact rod (7), and an elastic element (8). The pressing cover… (6) It is slidably connected to the first hole segment (3), the button contact rod (7) is slidably connected to the third hole segment (5), and the button contact rod (7) is tightly connected to the pressing cover (6). An explosion-proof joint surface (9) is also formed between the button contact rod (7) and the third hole segment (5). The elastic element (8) is limited in the second hole segment (4). The top end of the elastic element (8) acts on the button contact rod (7). The inner edge of the first sealing element (2) is tightly fitted on the lower insertion hole of the pressing cover (6). The outer edge of the first sealing element (2) is tightly fixed at the lower part of the first hole segment (3).

2. The explosion-proof and corrosion-resistant button according to claim 1, characterized in that: The insulating housing (1) includes an insulating bottom shell (10) and an insulating top shell (11). The lower part of the first hole segment (3), the second hole segment (4) and the third hole segment (5) are formed on the insulating bottom shell (10). The upper part of the first hole segment (3) is formed on the insulating top shell (11). An external thread (12) is also formed on the outer peripheral wall of the upper end of the insulating bottom shell (10). An internal thread (13) is also formed on the inner peripheral wall of the insulating top shell (11). The internal thread (13) cooperates with the external thread (12).

3. The explosion-proof and corrosion-resistant button according to claim 2, characterized in that: The first sealing element (2) includes a sealing ring platform (14) and a sealing ring skirt (15) connected sequentially from the inside to the outside. The sealing ring platform (14) is tightly fitted onto the lower peripheral wall of the pressing cover (6). The top of the inner wall of the sealing ring platform (14) is also provided with a first sealing lip (16) in a circumferential direction. The inner end of the sealing ring skirt (15) is an arc-shaped concave structure and is connected to the bottom outer peripheral wall of the sealing ring platform (14). The outer end of the sealing ring skirt (15) is a flat structure and is pressed onto the upper end surface of the insulating bottom shell (10) through the insulating cover shell (11). The outer edges of the upper and lower surfaces of the sealing ring skirt (15) are also provided with a second sealing lip (17) in a circumferential direction.

4. The explosion-proof and corrosion-resistant button according to claim 3, characterized in that: A first mounting ring groove (18) is formed at a corresponding position on the lower peripheral wall of the pressing cover (6), and a second mounting ring groove (19) is formed at a corresponding position on the upper end surface of the insulating bottom shell (10). The first mounting ring groove (18) cooperates with the first sealing lip (16), and the second mounting ring groove (19) cooperates with the second sealing lip (17) on the lower side.

5. The explosion-proof and corrosion-resistant button according to claim 3, characterized in that: The outer peripheral wall of the insulating base (10) is provided with a third mounting ring groove (20) below the external thread (12). The third mounting ring groove (20) is used to install the second seal. A support ring block (21) is also provided at the connection between the first hole section (3) and the second hole section (4). The top of the inner wall of the support ring block (21) is set as an inclined surface.

6. The explosion-proof and corrosion-resistant button according to claim 1, characterized in that: The button also includes a first limiting member (22) and a second limiting member (23) arranged on both sides of the third hole segment (5). The first limiting member (22) is detachably installed at the corresponding position at the lower end of the button contact rod (7). The second limiting member (23) is integrally formed at the corresponding position at the upper end of the button contact rod (7). The top end of the elastic member (8) acts on the second limiting member (23).

7. The explosion-proof and corrosion-resistant button according to claim 6, characterized in that: The lower end of the button contact rod (7) is provided with a fourth mounting ring groove (24), and the first limiting member (22) is locked in place with the fourth mounting ring groove (24). The lower part of the pressing cover (6) is also provided with a fifth mounting ring groove (25) surrounding the insertion hole, and the second limiting member (23) is fitted in place with the fifth mounting ring groove (25).

8. The explosion-proof and corrosion-resistant button according to claim 1, characterized in that: The button also includes a mounting base (26), which is detachably connected to the lower end of the insulating housing (1). The mounting base (26) is provided with a connection structure (27) fixed to the explosion-proof switch.

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