A normally closed push switch

Abstract

This utility model discloses a normally closed push-button switch, including a button, a mounting shell, terminals, a spring, a contact piece, a base, and an outer shell. A spring groove is provided in the middle of the base. The mounting shell is fixed to the base. The middle part of the contact piece fits over the lower end of the button, and the upper end of the button passes through the middle of the mounting shell. The lower end of the spring is located within the spring groove, and the upper end of the spring presses against the contact piece. The terminal is located on the outside of the mounting shell, and each end of the contact piece contacts a terminal. The outer shell covers the upper end of the mounting shell and is fixed to the base. This normally closed push-button switch disconnects the circuit in the normally closed state by a light touch and can elastically return to the normally closed state. It is easy to install and has a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the technical field of switches, and in particular to a normally closed push-button switch. Background Technology

[0002] In existing switches, when a circuit needs to be connected, pressing the switch closes the circuit, and this connection remains stable. Pressing the switch again causes it to spring back, disconnecting the circuit, and this disconnection also remains stable. Even switches with spring-back capability are normally open, which cannot meet the needs of users in different situations. Utility Model Content

[0003] One objective of this invention is to provide a normally closed push-button switch that maintains a closed circuit under normal conditions and can be pressed to disconnect the circuit when needed, and has a spring-loaded capability.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A normally closed push-button switch includes a button, a mounting shell, a terminal, a spring, a contact piece, a base, and a housing. The base has a spring groove in its center. The mounting shell is fixed to the base. The center of the contact piece is fitted over the lower end of the button. The upper end of the button passes through the center of the mounting shell. The lower end of the spring is located within the spring groove, and the upper end of the spring presses against the contact piece. The terminal is located outside the mounting shell. Both ends of the contact piece contact one of the terminals. The housing covers the upper end of the mounting shell and is fixed to the base.

[0006] As a preferred technical solution, the mounting housing has movable grooves on both sides inside, the upper end of the movable grooves penetrates the mounting housing, and the end of the contact piece moves in the movable grooves in the vertical direction.

[0007] As a preferred technical solution, a first locking block is formed on the upper inner side of the housing, the first locking block is located at the upper end of the movable groove, and the first locking block presses on the terminal.

[0008] As a preferred technical solution, the lower end of the button is formed with an annular edge, the annular edge is pressed on the contact piece, and the lower middle part of the button passes through the contact piece and is then inserted into the spring.

[0009] As a preferred technical solution, the side of the mounting shell is formed with a terminal mounting position, and a second locking block is provided on the terminal mounting position, which is locked on the outside of the terminal.

[0010] As a preferred technical solution, a card is bent on the terminal, the card is located on one side of the second card block, and the card abuts against the terminal mounting position.

[0011] As a preferred technical solution, the base is formed with a positioning post, and the mounting shell is provided with a positioning hole, and the positioning post is inserted into the interior of the positioning post.

[0012] As a preferred technical solution, the outer side of the base is formed with a buckle, and the outer shell is provided with a locking hole, and the buckle is engaged in the locking hole.

[0013] The beneficial effects of this utility model are as follows: It provides a normally closed push switch, which disconnects the circuit in the normally closed state by lightly pressing it, and can be elastically restored to the normally closed state. It is easy to install and has a wide range of applications. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of a normally closed push-button switch as described in the embodiment;

[0016] Figure 2 This is a schematic diagram of the outer casing as described in the embodiment;

[0017] Figure 3 This is a first internal structure diagram of a normally closed push-button switch as described in the embodiment;

[0018] Figure 4 This is a second internal structure diagram of a normally closed push-button switch as described in the embodiment;

[0019] Figure 5 This is a third internal structure diagram of a normally closed push-button switch as described in the embodiment;

[0020] Figure 6 This is a schematic diagram of the mounting shell described in the embodiment.

[0021] Figures 1 to 6 middle:

[0022] 1. Button; 2. Mounting housing; 3. Terminal; 4. Spring; 5. Contact piece; 6. Base; 7. Housing; 8. Spring groove; 9. Movable groove; 10. First locking block; 11. Terminal mounting position; 12. Second locking block; 13. Card; 14. Positioning post; 15. Positioning hole; 16. Snap-on; 17. Snap-hole. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 6 As shown in this embodiment, a normally closed push-button switch includes a button 1, a mounting shell 2, a terminal 3, a spring 4, a contact piece 5, a base 6, and a housing 7. The base 6 has a spring groove 8 in the middle. The mounting shell 2 is fixed on the base 6. The middle part of the contact piece 5 is fitted over the lower end of the button 1. The upper end of the button 1 passes through the middle part of the mounting shell 2. The lower end of the spring 4 is in the spring groove 8. The upper end of the spring 4 presses down on the contact piece 5. The terminal 3 is located on the outside of the mounting shell 2. The two ends of the contact piece 5 are in contact with a terminal 3 respectively. The housing 7 covers the upper end of the mounting shell 2 and is fixed to the base 6.

[0025] Under the action of spring 4, contact piece 5 and button 1 are pushed upward. When contact piece 5 is at its highest position, it contacts terminal 3, making the entire circuit connected and forming a normally closed structure. When it is necessary to disconnect the circuit, press button 1, which causes button 1 and contact piece 5 to move downward. At this time, spring 4 retracts into spring groove 8. After contact piece 5 moves downward, it will separate from terminal 3, forming an open circuit. When button 1 is released, spring 4 will push button 1 and contact piece 5 upward again.

[0026] Both sides of the mounting housing 2 have movable grooves 9. The upper end of the movable groove 9 penetrates the mounting housing 2. The end of the contact piece 5 moves vertically within the movable groove 9. The upper inner side of the housing 7 has a first locking block 10 formed. The first locking block 10 is located at the upper end of the movable groove 9 and presses against the terminal 3. The lower end of the button 1 has an annular edge formed, which presses against the contact piece 5. The middle of the lower end of the button 1 passes through the contact piece 5 and is then inserted into the spring 4. The side of the mounting housing 2 has a terminal mounting plate formed. The terminal mounting position 11 has a second locking block 12, which is locked on the outside of the terminal 3. The terminal 3 has a bent card 13, which is located on one side of the second locking block 12 and abuts against the terminal mounting position 11. The base 6 has a positioning post 14, and the mounting shell 2 has a positioning hole 15. The positioning post 14 is inserted into the interior of the positioning post 14. The outer side of the base 6 has a buckle 16, and the outer shell 7 has a buckle hole 17, which is engaged with the buckle 16.

[0027] When the spring 4 controls the contact piece 5 to move upward, the contact piece 5 passes through the mounting shell 2 and contacts the upper part of the terminal 3 on the outside of the mounting shell 2, forming a normally closed state. During the pressing of the button 1, the contact piece 5 moves up and down in the movable groove 9 inside the mounting shell 2. In order to ensure that the terminal 3 and the contact piece 5 can contact each other at the highest position of the contact piece 5, the first locking block 10 of the outer shell 7 controls the position of the terminal 3, and the second locking block 12 fixes the terminal 3 on the outside of the mounting shell 2. The connection between the positioning post 14 and the positioning hole 15 makes the assembly of the base 6 and the mounting shell 2 more convenient. Then, the buckle 16 and the locking hole 17 are used for assembly and fixation.

[0028] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles applied thereto. Within the scope of the technology disclosed in this utility model, any variations or substitutions that are easily conceived by those skilled in the art should be covered within the protection scope of this utility model.

Claims

1. A normally closed push-button switch, characterized in that, The device includes a button, a mounting shell, terminals, a spring, a contact piece, a base, and an outer shell. The base has a spring groove in its middle. The mounting shell is fixed to the base. The middle part of the contact piece is fitted over the lower end of the button. The upper end of the button passes through the middle part of the mounting shell. The lower end of the spring is located in the spring groove, and the upper end of the spring presses against the contact piece. The terminal is located on the outside of the mounting shell. Both ends of the contact piece are in contact with one of the terminals. The outer shell covers the upper end of the mounting shell and is fixed to the base.

2. A normally closed push-button switch according to claim 1, characterized in that, The mounting housing has movable grooves on both sides inside. The upper end of the movable groove penetrates the mounting housing, and the end of the contact piece moves in the movable groove along the vertical direction.

3. A normally closed push-button switch according to claim 2, characterized in that, A first locking block is formed on the upper inner side of the outer casing. The first locking block is located at the upper end of the movable groove and presses against the terminal.

4. A normally closed push-button switch according to claim 1, characterized in that, The lower end of the button is formed with an annular edge, which presses against the contact piece. The middle part of the lower end of the button passes through the contact piece and is then inserted into the spring.

5. A normally closed push-button switch according to claim 1, characterized in that, The side of the mounting housing is formed with a terminal mounting position, and a second locking block is provided on the terminal mounting position, which locks onto the outside of the terminal.

6. A normally closed push-button switch according to claim 5, characterized in that, A card is bent onto the terminal, the card is located on one side of the second card block, and the card abuts against the terminal mounting position.

7. A normally closed push-button switch according to claim 1, characterized in that, The base has a positioning post formed on it, and the mounting shell has a positioning hole, into which the positioning post is inserted.

8. A normally closed push-button switch according to claim 1, characterized in that, The base has a buckle formed on its outer side, and the outer shell has a locking hole, with the buckle engaging in the locking hole.

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