Button head sealing structure of explosion-proof button switch

Abstract

The utility model discloses a button head sealing structure of an explosion-proof button switch, which comprises a button shell and a shell cap, and the shell cap is in threaded connection with the upper end of the button shell. The button comprises a button rod and a button head, the lower end of the button head is in threaded connection with the upper end of the button rod, and the upper end of the button head is arranged in the shell cap; the button is characterized in that a button head sealing ring is arranged in the shell cap, the button head sealing ring comprises an outer sealing part arranged on the outer edge and an inner sealing part arranged on the inner edge, and a wrinkle part is arranged between the outer sealing part and the inner sealing part; the outer sealing part is arranged between the button shell and the shell cap, and the inner sealing part is arranged between the button head and the button rod; in the use process, the button head is pressed to drive the button rod to move downwards, and the wrinkle part is opened downwards, so that the normal use of the button switch is ensured, the cavity of the button shell is completely sealed with the outside, harmful substances in the use environment of the explosion-proof button switch are prevented from entering, and the normal use of the explosion-proof button switch is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof switch more particularly, it relates to a button head sealing structure of explosion -proof button switch. BACKGROUND

[0002] Explosion -proof switch mainly applies to the machine equipment and system power supply occasion of the manufacturing plant that can exist in the flammable and explosive gas or explosive dust environment, especially external electrical equipment, such as motor, pump, lighting equipment, use in dangerous factory and plant process control device, or flammable gas, steam, mist gas or flammable dust explosion environment.

[0003] General explosion -proof button switch includes the button part of upper end and the movement core part of lower end and power connection, and it is by pressing button head to control the on-off of movement core, so explosion -proof button switch needs to move up and down relative to button shell in actual application, and there will be gap between button head and button shell, lead to harmful substance in the use environment of explosion -proof button switch, lead to explosion -proof button switch failure. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model aims at providing a button head sealing structure of explosion -proof button switch.

[0005] A button head sealing structure of explosion -proof button switch, including the button shell for installing button and the shell cap, the shell cap is screw -threaded on the upper end of button shell, the button includes button rod and button head, the lower end of button head is screw -threaded on the upper end of button rod, and the upper end is placed in the shell cap, the shell cap is equipped with button head sealing ring, button head sealing ring includes the outer sealing part of outer edge and the inner sealing part of inner edge, and the wrinkle part is equipped between the outer sealing part and the inner sealing part.

[0006] The outer sealing part is placed between button shell and shell cap, the inner sealing part is placed between button head and button rod, and the wrinkle part is opened down by pressing button head and driving button rod to move down.

[0007] The utility model further sets up: the lower end surface of outer sealing part is equipped with sealing groove, and the upper end surface of button shell is equipped with sealing protrusion that is compatible with sealing groove;

[0008] The lower end of shell cap compacts outer sealing part downward, and the sealing groove is tightly matched with sealing protrusion.

[0009] The utility model further sets up: the upper end surface of button rod is equipped with pressing groove, and the lower end of button head is equipped with pressing convex ring corresponding with pressing groove;

[0010] The pressing convex ring presses the inner sealing part of the button head sealing ring downward, and the lower end surface of the inner sealing part is tightly attached to the pressing concave groove.

[0011] The utility model further sets up: the lower end part outer side wall of button shell is equipped with outer thread, and is installed on equipment base through nut;

[0012] The lower end part of the button shell is sleeved with a mounting sealing ring, the upper end surface of the mounting sealing ring is tightly attached to the button shell, and the lower end surface thereof is tightly attached to the upper end surface of the equipment base.

[0013] The utility model further sets up: the upper end surface of mounting sealing ring is equipped with upper sawtooth sealing part, and the lower end surface thereof is equipped with lower sawtooth sealing part;

[0014] The nut is screwed into the lower end part of the button shell, the upper end surface of the equipment base presses the lower sawtooth sealing part upward, and the button shell presses the lower sawtooth sealing part downward.

[0015] The utility model has the advantages that the explosion-proof button switch comprises a button shell and a shell cap, the button comprises a button rod and a button head, the lower end of the button head is threadedly connected to the upper end of the button rod, and the upper end of the button head is arranged in the shell cap; a button head sealing ring is arranged in the shell cap, the button head sealing ring comprises an outer sealing part arranged at an outer edge and an inner sealing part arranged at an inner edge, and a wrinkle part is arranged between the outer sealing part and the inner sealing part; after assembly is completed, the outer sealing part is arranged between the button shell and the shell cap to seal the button shell and the shell cap; the inner sealing part is arranged between the button head and the button rod to seal the button head and the button rod; during use, the button head is pressed to drive the button rod to move downward, the wrinkle part is opened downward, normal use of the button switch is ensured, the cavity of the button shell is completely sealed from the outside, the outer edge of the button shell is sealed, and the internal cavity for mounting the button is sealed, harmful substances in the use environment of the explosion-proof button switch are prevented from entering, and normal use of the explosion-proof button switch is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an application diagram of the button head sealing structure of the utility model;

[0017] Figure 2 It is a sectional view of the button head sealing structure of the utility model;

[0018] Figure 3 It is a structural schematic view of the button head sealing structure of the utility model;

[0019] Figure 4The utility model discloses a button head sealing structure of an explosion-proof button switch.

[0020] Figure 5 The utility model discloses a button head sealing structure of an explosion-proof button switch.

[0021] Figure 6 The utility model discloses a button head sealing structure of an explosion-proof button switch. Figure 1 ;

[0022] Figure 7 The utility model discloses a button head sealing structure of an explosion-proof button switch. Figure 2 ;

[0023] Figure 8 The utility model discloses a button head sealing structure of an explosion-proof button switch.

[0024] Figure 9 The utility model discloses a button head sealing structure of an explosion-proof button switch.

[0025] Mark 1, button shell; 11, sealing protrusion; 12, outer thread; 2, shell cap; 3, button; 31, button rod; 311, compression groove; 32, button head; 321, compression convex ring; 4, button head sealing ring; 41, outer sealing part; 411, sealing groove; 42, inner sealing part; 43, pleat part; 5, nut; 6, equipment base; 7, installation sealing ring;

[0026] 71, upper sawtooth sealing part; 72, lower sawtooth sealing part. DETAILED DESCRIPTION

[0027] Refer to the attached Figures 1 to 9 The utility model discloses a button head sealing structure of an explosion-proof button switch.

[0028] A button head sealing structure of an explosion-proof button switch, including button shell 1 for installing button 3 and shell cap 2, the shell cap 2 is connected in screw thread on the upper end of button shell 1, the button 3 includes button rod 31 and button head 32, the lower end of button head 32 is connected in screw thread on the upper end of button rod 31, and the upper end is placed in shell cap 2, and the upper end of shell cap 2 is equipped with the opening that is adapted to button head 32, the shell cap 2 is equipped with button head sealing ring 4, and button head sealing ring 4 includes the outer sealing part 41 of the outer edge and the inner sealing part 42 of the inner edge, and the outer sealing part 41 and the inner sealing part 42 are equipped with the pleat part 43 between them;

[0029] After the assembly is completed, the outer sealing part 41 is placed between the button shell 1 and the cap 2 to seal the button shell 1 and the cap 2; the inner sealing part 42 is placed between the button head 32 and the button rod 31 to seal the button head 32 and the button rod 31; during use, the button head 32 is pressed to drive the button rod 31 to move downward, and the fold part 43 is opened downward, which ensures the normal use of the button 3 switch and completely seals the cavity of the button shell 1 from the outside, that is, seals the outer edge of the button shell 1 and the internal cavity for installing the button 3, so as to prevent harmful substances in the use environment of the explosion-proof button 3 switch from entering and ensure the normal use of the explosion-proof button 3 switch.

[0030] The lower end surface of the outer sealing part 41 is provided with a sealing groove 411, and the upper end surface of the button shell 1 is provided with a sealing protrusion 11 matched with the sealing groove 411; the lower end of the cap 2 presses the outer sealing part 41 downward to tightly fit the sealing groove 411 and the sealing protrusion 11, thereby enhancing the sealing between the button shell 1 and the cap 2.

[0031] The upper end surface of the button rod 31 is provided with a pressing groove 311, and the lower end of the button head 32 is provided with a pressing protruding ring 321 corresponding to the pressing groove 311; the pressing protruding ring 321 presses the inner sealing part 42 of the button head sealing ring 4 downward, so that the lower end surface of the inner sealing part 42 is tightly fitted in the pressing groove 311; thereby better ensuring the sealing between the button head 32 and the button rod 31, and preventing harmful substances from entering the explosion-proof button 3 switch from the gap between the two.

[0032] In order to facilitate the installation operation of the explosion-proof button 3 switch, the lower end of the outer wall of the button shell 1 is provided with an outer thread 12, and is installed on the equipment base 6 through a nut 5; in order to prevent harmful substances from entering from the installation part of the explosion-proof button 3 switch, the lower end of the button shell 1 is provided with an installation sealing ring 7, the upper end surface of the installation sealing ring 7 is tightly fitted on the button shell 1, and the lower end surface is tightly fitted on the upper end surface of the equipment base 6; the upper end surface of the installation sealing ring 7 is provided with an upper sawtooth sealing part 71, and the lower end surface is provided with a lower sawtooth sealing part 72; the nut 5 is screwed into the lower end of the button shell 1, so that the upper end surface of the equipment base 6 presses the lower sawtooth sealing part 72 upward, and the button shell 1 presses the lower sawtooth sealing part 72 downward; to further improve the sealing performance of the installation part of the explosion-proof button 3 switch.

[0033] The button head sealing ring 4 and the mounting sealing ring 7 are made of rubber material, and have good elasticity and compressibility. The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme belonging to the utility model idea belongs to the protection scope of the utility model. It should be pointed out that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A button head sealing structure for an explosion-proof push button switch, comprising a button housing and a housing cap for mounting a button, the housing cap being threadedly connected to the upper end of the button housing; the button comprising a button stem and a button head, the lower end of the button head being threadedly connected to the upper end of the button stem, the upper end of the button head being disposed within the housing cap; characterized in that: A button head sealing ring is provided in the shell cap, and the button head sealing ring includes an outer sealing portion provided on the outer edge and an inner sealing portion provided on the inner edge, and a fold portion is provided between the outer sealing portion and the inner sealing portion; The outer sealing portion is placed between the button housing and the shell cap, and the inner sealing portion is placed between the button head and the button rod. Pressing the button head drives the button rod to move downward, and the folded portion opens downward.

2. The button head sealing structure of an explosion-proof push button switch according to claim 1, characterized in that: The lower end surface of the outer sealing portion is provided with a sealing groove, and the upper end surface of the button housing is provided with a sealing protrusion adapted to the sealing groove; The lower end of the shell cap presses the outer sealing portion downwards so that the sealing groove and the sealing protrusion are tightly fitted.

3. The button head sealing structure of an explosion-proof push button switch according to claim 2, characterized in that: The upper end surface of the button rod is provided with a pressing groove, and the lower end of the button head is provided with a pressing convex ring corresponding to the pressing groove; The pressing convex ring presses the inner sealing portion of the button head sealing ring downwards, so that the lower end surface of the inner sealing portion is tightly attached to the pressing groove.

4. The button head sealing structure of an explosion-proof push button switch according to claim 1, 2 or 3, wherein: The outer wall of the lower end of the button housing is provided with an external thread and is mounted on the device base through a nut; The lower end of the button shell is sleeved with a mounting seal ring, the upper end surface of the mounting seal ring is tightly attached to the button shell, and the lower end surface thereof is tightly attached to the upper end surface of the equipment base.

5. The button head sealing structure of an explosion-proof push button switch according to claim 4, characterized in that: The upper end surface of the mounting sealing ring is provided with an upper serrated sealing portion, and the lower end surface thereof is provided with a lower serrated sealing portion; the nut is screwed into the lower end portion of the button housing so that the upper end surface of the equipment base presses the lower serrated sealing portion upward, and the button housing presses the lower serrated sealing portion downward.

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