High-voltage switch

Abstract

The utility model provides a high-voltage switch which comprises a shell, an action piece, a movable contact piece, a static contact piece and an ejector rod are arranged in the shell, the action piece can be pressed to deform, the two ends of the ejector rod abut against the movable contact piece and the action piece respectively, and an upper sealing piece and a lower sealing piece are arranged in the shell. The upper sealing piece and the lower sealing piece are respectively positioned at the upper end and the lower end of an inner cavity of the shell, a sealing cavity is formed between the upper sealing piece and the shell and between the lower sealing piece and the shell, the action piece, the movable contact piece, the static contact piece and the ejector rod are all arranged in the sealing cavity, the lower sealing piece is provided with a protruding part, and the lower sealing piece is provided with a protruding part. The protruding part can elastically deform towards the outside of the sealing cavity under the influence of internal pressure. Aiming at the defects in the prior art, the utility model provides the high-voltage switch which is more stable in operation on the basis of ensuring the waterproof effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure switch field especially a high pressure switch. BACKGROUND

[0002] Pressure switch also called high pressure switch is a kind of equipment for monitoring and controlling pressure, commonly used in small household appliance field, such as electric pressure cooker, electric rice cooker and the product, pressure switch usually includes inductive piece, moving contact, static contact and action piece, wherein inductive piece is used to induct the pressure change of measured medium, usually selects action piece, when the pressure change of measured medium, inductive piece promotes action piece to move, to drive moving contact to act, promotes the cooperation between moving contact and static contact to change, changes the on-off state of circuit, but the pressure switch of prior art, to guarantee waterproof effect, it is sealed, when internal pressure becomes big, the operation of inductive piece is easily influenced, and there is the problem of affecting operation, therefore, additional pressure relief hole is usually set, but this also influences the sealing capacity of product. SUMMARY

[0003] In view of the deficiency of prior art, the utility model provides a high pressure switch which is more stable in operation on the basis of guaranteeing waterproof effect.

[0004] To achieve the above object, the utility model provides a high pressure switch, including the casing, the casing is provided with action piece, moving contact, static contact and jackscrew, the action piece can be deformed under pressure, the both ends of the jackscrew abut moving contact and action piece respectively, the casing is provided with upper sealing sheet and lower sealing sheet, the upper sealing sheet and lower sealing sheet are positioned at the upper and lower ends of the inner chamber of casing respectively, and the upper sealing sheet and lower sealing sheet form sealed cavity with the casing, the action piece, moving contact, static contact and jackscrew are all arranged in the sealed cavity, the lower sealing sheet is provided with convex part, and the convex part can be elastically deformed out of the sealed cavity under the influence of internal pressure.

[0005] The advantages of the above technical scheme are as follows: by setting upper sealing sheet and lower sealing sheet in the casing, the sealed cavity is formed between the upper sealing sheet, the lower sealing sheet and the casing, which effectively prevents the contact between external moisture and internal electrical components, prevents the moisture from entering the switch and causing short circuit, corrosion and other problems, thereby ensuring the reliable operation of the high pressure switch in humid, water-splashing and other harsh environments, and greatly guaranteeing the waterproof effect, and on this basis, the convex part capable of elastic deformation is arranged on the lower sealing piece, which can adapt to the fluctuation of internal pressure by the elastic deformation of the deformation part without communicating with the outside, prevent the sealing failure caused by excessive internal pressure, and also relieve the impact of internal pressure change on other components to some extent, thereby ensuring the stability of the product.

[0006] The utility model discloses further can set up: the shell includes accommodation groove and intercommunication hole, the accommodation groove set in the below of lower sealing sheet and can supply the protruding portion and enter, the intercommunication hole sets up at the bottom surface of accommodation groove and is set up with outside intercommunication.

[0007] Through further setting, the accommodation groove provides sufficient activity space for the protruding portion on the lower sealing sheet, so that the protruding portion can be elastically deformed freely outside the sealing cavity when being affected by internal pressure, and the protruding portion can be prevented from being hindered during deformation, so that the protruding portion can work normally, and the intercommunication hole is set to be in intercommunication with the outside, so that the pressure in the accommodation groove can be balanced with the outside, and additional resistance or interference on the deformation of the protruding portion due to the change of the pressure in the accommodation groove is avoided, so that the pressure in the sealing cavity is stably adjusted, and the stability of the overall operation of the switch is improved

[0008] The utility model discloses further can set up: the upper sealing sheet surrounds the contact area of action sheet and the top rod and forms the arc bending part.

[0009] Through further setting, the arc bending part is arranged on the contact area of the upper sealing sheet and the top rod, the corresponding area of the upper sealing sheet is more flexible and elastic through the arc bending part, and the corresponding area can be deformed correspondingly with the movement of the action sheet and the top rod.

[0010] The utility model discloses further can set up: the dynamic contact piece elastically swings and sets at the below of static contact piece, and the end of dynamic contact piece is provided with at least two dynamic contact points for dynamic contact piece elastic reset and abutting tightly on static contact piece, and the top rod abuts at the middle part of dynamic contact piece.

[0011] Through further setting, the end of the dynamic contact piece is provided with at least two dynamic contact points, when the dynamic contact piece is elastically reset, the dynamic contact points can abut tightly on the static contact piece, the contact of the at least two dynamic contact points can increase the contact area and the contact reliability between the dynamic contact piece and the static contact piece, even if there is impurity between the dynamic contact point and the static contact piece, the switch is frequently operated or is subjected to vibration, etc., the circuit conduction stability can be ensured, the circuit interruption or signal fluctuation problem caused by poor contact is reduced, and the working stability and the reliability of the switch are improved.

[0012] The utility model discloses further can set up: the shell includes main part, mounting block, interval block and upper cover, the mounting block and interval block are successively sleeved into the main part, the upper cover is screwed with the main part and can be pressed on the interval block, the action sheet sets up on the interval block, the top rod is slidably inserted on the interval block, the mounting block and the upper cover form the clamping of the upper sealing sheet, and the bottom surface of the mounting block and the main part form the clamping of the lower sealing sheet.

[0013] By further setting, by the screw connection between the cover plate and the main body, the upper cover is pressed on the spacing block, the spacing block is pressed on the mounting block at the bottom of the main body, and then the mounting block and the upper cover are clamped to the lower sealing piece, and the mounting block and the upper cover are clamped to the lower sealing piece, which ensures the close fit between the sealing piece and each part of the shell, guarantees the sealing effect, facilitates installation, and compared with the ultrasonic welding mode of the prior art, can also avoid the generation of debris, avoid the conductive cooperation between the debris and the movable contact piece and the static contact piece, and facilitate the disassembly and maintenance in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of an embodiment of the utility model;

[0015] Figure 2 It is an embodiment of the utility model Figure 1 It is a sectional view of A-A in the embodiment of the utility model;

[0016] Figure 3 It is a cooperation schematic view of the static contact piece and the movable contact piece in the embodiment of the utility model;

[0017] Figure 4 It is a structural schematic view of the upper sealing piece in the embodiment of the utility model;

[0018] Figure 5 It is a structural schematic view of the lower sealing piece in the embodiment of the utility model;

[0019] Wherein: the shell 1;The accommodating groove 11;The communication hole 12;The main body 13;The mounting block 14;The spacing block 15;The upper cover 16;The action piece 2;The movable contact piece 3;The movable contact point 31;The static contact piece 4;The top rod 5;The upper sealing piece 6;The arc-shaped bending part 61;The lower sealing piece 7;The protruding part 71. DETAILED DESCRIPTION

[0020] The embodiment of the utility model high voltage switch as shown in Figures 1-5 The shell 1, the action piece 2, the movable contact piece 3, the static contact piece 4 and the top rod 5 are arranged in the shell 1, the action piece 2 can be deformed under pressure, the two ends of the top rod 5 abut against the movable contact piece 3 and the action piece 2 respectively, the upper sealing piece 6 and the lower sealing piece 7 are arranged in the shell 1, the upper sealing piece 6 and the lower sealing piece 7 are positioned at the upper and lower ends of the inner cavity of the shell 1 respectively, and a sealed cavity is formed between the upper sealing piece 6 and the lower sealing piece 7 and the shell 1, the action piece 2, the movable contact piece 3, the static contact piece 4 and the top rod 5 are arranged in the sealed cavity, the protruding part 71 is arranged on the lower sealing piece 7, and the protruding part 71 can be elastically deformed out of the sealed cavity under the influence of internal pressure.

[0021] The shell 1 comprises a containing groove 11 and a communication hole 12, the containing groove 11 is arranged below the lower sealing sheet 7 and the protruding part 71 can extend into the containing groove 11, and the communication hole 12 is arranged on the bottom surface of the containing groove 11 and is communicated with the outside.

[0022] The upper sealing sheet 6 is provided with an arc-shaped bending part 61 around the contact area of the action sheet 2 and the top rod 5.

[0023] The dynamic contact sheet 3 is elastically swung below the static contact sheet 4, and the end part of the dynamic contact sheet 3 is provided with at least two dynamic contact points 31 for elastically resetting the dynamic contact sheet 3 to abut against the static contact sheet 4, and the top rod 5 abuts against the middle part of the dynamic contact sheet 3.

[0024] The shell 1 comprises a main body 13, a mounting block 14, a spacing block 15 and an upper cover 16, the mounting block 14 and the spacing block 15 are successively sleeved into the main body 13, the upper cover 16 is screw-connected with the main body 13 and can be pressed against the spacing block 15, the action sheet 2 is arranged on the spacing block 15, the top rod 5 is slidably inserted into the spacing block 15, the mounting block 14 and the upper cover 16 form clamping of the upper sealing sheet 6, and the mounting block 14 and the bottom surface of the main body 13 form clamping of the lower sealing sheet 7.

[0025] The above examples are only one of the preferred specific examples of the present application, and the common changes and replacements within the technical scheme of the present application by the person skilled in the art are all included in the protection scope of the present application.

Claims

1. A high-voltage switch, comprising a housing, wherein an actuating plate, a moving contact, a stationary contact, and a push rod are disposed within the housing, the actuating plate being capable of deformation under pressure, and the two ends of the push rod respectively abutting against the moving contact and the actuating plate, characterized in that: The upper sealing sheet and the lower sealing sheet are positioned at the upper and lower ends of the inner cavity of the shell respectively, and a sealing cavity is formed between the upper sealing sheet, the lower sealing sheet and the shell, the action sheet, the moving contact sheet, the static contact sheet and the ejector rod are arranged in the sealing cavity, the protruding part is arranged on the lower sealing sheet and can be elastically deformed out of the sealing cavity under the influence of internal pressure.

2. The high voltage switch of claim 1, wherein: The shell comprises a containing groove and a communication hole, the containing groove is arranged below the lower sealing sheet and can be used for the protruding part to extend into, and the communication hole is arranged on the bottom surface of the containing groove and is arranged in communication with the outside.

3. The high voltage switch according to claim 1 or 2, characterized in that: The upper sealing sheet is formed with an arc-shaped bending part around the contact area of the action sheet and the ejector rod.

4. The high voltage switch according to claim 1 or 2, characterized in that: The moving contact sheet is elastically swung and arranged below the static contact sheet, the end of the moving contact sheet is provided with at least two moving contact points for elastically resetting and abutting on the static contact sheet, and the ejector rod abuts on the middle part of the moving contact sheet.

5. The high voltage switch according to claim 1 or 2, characterized in that: The shell comprises a main body, a mounting block, a spacing block and an upper cover, the mounting block and the spacing block are successively sleeved into the main body, the upper cover is screw-coupled with the main body and can be pressed on the spacing block, the action sheet is arranged on the spacing block, the ejector rod is slidably inserted on the spacing block, the mounting block and the upper cover form clamping of the upper sealing sheet, and the bottom surface of the mounting block and the main body form clamping of the lower sealing sheet.

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