CN209962926U

CN209962926U - Micro-gap switch with waterproof function

Info

Publication number: CN209962926U
Application number: CN201921246814.8U
Authority: CN
Inventors: 陈红
Original assignee: Hong Bao Electrical Appliances Co Ltd Of Huizhou City
Current assignee: Hong Bao Electrical Appliances Co Ltd Of Huizhou City
Priority date: 2019-08-04
Filing date: 2019-08-04
Publication date: 2020-01-17
Anticipated expiration: 2029-08-04

Abstract

The utility model discloses a microswitch with waterproof function, which comprises a shell, a needle seat, a terminal, a switch component and a button, wherein the terminal is arranged on the needle seat in a plastic-coated mode, and the switch component is arranged on the terminal; the shell is provided with a needle seat socket and a button installation opening, the whole structure formed by connecting the needle seat, the terminal and the switch assembly is inserted into the shell through the needle seat socket, and a first sealing element is arranged between the needle seat and the shell; the button is inserted from the outside of the housing to the inside of the housing through the button mounting opening to be connected with the switch assembly, and a second sealing member is provided between the button and the housing. The utility model is used for realize micro-gap switch's waterproof function.

Description

Micro-gap switch with waterproof function

Technical Field

The utility model relates to a circuit components and parts technical field, concretely relates to micro-gap switch with waterproof function.

Background

The switch is an on-off control component in the circuit and plays an important role in realizing the functions of the circuit. A microswitch is a type of switch, and is a switch for executing a command by a very small motion (acting force), and is widely used in various small home appliances. Most of the existing micro switches are used in the air environment and have no requirements on water resistance, sealing and the like; the common microswitch is waterproof in the rubber shell structure, the installation of the terminal and the rubber shell, and the connection of the button and the rubber shell. Some electrical appliances (such as coffee machines) need to prevent water from entering and causing short circuit, so the switch of the electrical appliances needs to have a waterproof function, and a microswitch with simple process and low cost is urgently needed in the market.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide a simple process, low cost's micro-gap switch.

In order to solve the technical problem, the technical scheme of the utility model is that: a microswitch with a waterproof function comprises a shell, a needle base, a terminal, a switch assembly and a button, wherein the terminal is arranged on the needle base in a plastic coating mode, and the switch assembly is arranged on the terminal; the shell is provided with a needle seat socket and a button installation opening, the whole structure formed by connecting the needle seat, the terminal and the switch assembly is inserted into the shell through the needle seat socket, and a first sealing element is arranged between the needle seat and the shell; the button is inserted from the outside of the housing to the inside of the housing through the button mounting opening to be connected with the switch assembly, and a second sealing member is provided between the button and the housing.

Further, the periphery of the needle base is provided with a circle of mounting groove, the first sealing element is a sealing ring, the first sealing element is sleeved on the mounting groove and is abutted between the needle base and the shell.

Furthermore, a plurality of mounting grooves are formed in the periphery of the needle seat, and a first sealing element is arranged on each mounting groove.

Further, a clamping block is arranged on the needle base, a clamping hole is formed in the shell, and the clamping block can be clamped into the clamping hole.

Further, the second sealing element is a silica gel cap, one end of the second sealing element is fixed on the inner side of the button installation opening, and the other end of the second sealing element is sleeved on the periphery of the button.

Furthermore, the button periphery is also sleeved with a button sleeve, and one end of the second sealing element is clamped between the outer side of the button sleeve and the inner side of the button installation opening.

Further, the terminal comprises a normally closed terminal, a normally open terminal and a public terminal, and the normally closed terminal, the normally open terminal and the public terminal are arranged on the needle base in parallel.

Furthermore, the public terminal is provided with a zigzag mounting end at the inner side of the needle seat; the switch assembly comprises a moving piece and a support rod, wherein a slot is formed in the moving piece, an elastic sheet is arranged on one side in the slot, and the free end of the elastic sheet abuts against the mounting end; one end of the supporting rod is supported on the mounting end, and the other end of the supporting rod is supported on the other side, opposite to the elastic sheet, in the groove; the movable plate is arranged between the normally closed terminal and the normally open terminal.

Further, be provided with the end of buckling on the branch, the end of buckling is the structure of once buckling, it is provided with the notch to buckle the end side, buckle the end and go into in the fluting through the notch card.

Furthermore, a square hole for avoiding the supporting rod is further arranged on the supporting rod

The utility model discloses the beneficial effect who realizes mainly has following several:

1. the terminal is arranged on the needle seat in a plastic-coated mode, the terminal is tightly connected with the needle seat to form a sealing structure, and the waterproof performance of the terminal and the needle seat can be realized.

2. The shell is the integral type structure that only is provided with needle file socket and button installation opening for shell wholeness and leakproofness are better, can improve micro-gap switch's waterproof performance.

3. A first sealing element is arranged between the needle seat and the shell for sealing, so that a sealed waterproof structure is formed between the needle seat and the shell, and the integral structure formed by connecting the needle seat, the terminal and the switch assembly is installed in an inserting mode, so that the microswitch is simple and convenient to assemble; and a second sealing element is arranged between the button and the shell, so that the sealing between the button and the shell is realized, and the waterproof performance between the button and the shell is ensured.

In a word, through the waterproof design of each part, the whole microswitch has good waterproof performance, and can be used for the adaptive environment needing waterproof, such as outdoors, underwater and the like.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure of a microswitch with a waterproof function according to a first embodiment of the present invention;

fig. 2 is a schematic longitudinal sectional structure view of a micro switch with a waterproof function according to a first embodiment of the present invention;

fig. 3 is an exploded schematic view of a microswitch with a waterproof function according to a first embodiment of the present invention (in which a half of the housing is cut away);

fig. 4 is a schematic structural view of the microswitch with the waterproof function after the terminal, the needle seat and the switch assembly are assembled in the first embodiment of the invention;

fig. 5 is a schematic structural view of the microswitch with waterproof function after the terminal and the needle seat are assembled in the first embodiment of the invention;

fig. 6 is a schematic structural diagram of a casing of a micro switch having a waterproof function according to a first embodiment of the present invention;

fig. 7 is a schematic structural view of a moving plate of a micro switch having a waterproof function according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a support rod of a micro switch having a waterproof function according to a first embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 ~ 8, a micro-gap switch with waterproof function has waterproof function, and micro-gap switch includes shell 1, needle file 2, terminal 3, switch module 4 and button 5, terminal 3 sets up on needle file 2 through the mode of plastic-coated, and needle file 2 is injection moulding's plastic part, and when needle file 2 injection moulding, puts into the injection mould intracavity with terminal 3, and the colloid of needle file 2 was just plastic-coated around terminal 3 after the completion of moulding plastics, and it is inseparable to connect between terminal 3 and the formation of needle file 2, forms sealed structure, can realize terminal 3 and needle file 2 waterproof, switch module 4 installs on terminal 3, with each terminal electrical property intercommunication or electrical property disconnection, realizes micro-gap switch's switch function.

Referring to fig. 1 ~ 8, the housing 1 is provided with a hub socket 11 and a button mounting opening 12 for mounting the hub 2 and the button 5, respectively, the housing 1 is a hollow cavity structure, and the inner space can accommodate the terminal 3, the switch assembly 4 and the button 5, the housing 1 is also generally made of injection molding plastic, except the hub socket 11 and the button mounting opening 12, the housing 1 is an integrated closed structure, only the hub socket 11 and the button mounting opening 12 are provided on the housing 1 for mounting the hub 2 and the button 5, so that the integrity and the sealing performance of the housing 1 are better, and the waterproof performance of the microswitch can be improved.

Referring to fig. 1 ~ 8, the integral structure of the connection of the hub 2, the terminal 3 and the switch assembly 4 is inserted into the housing 1 through the hub socket 11, and the first sealing element 6 is arranged between the hub 2 and the housing 1, so that a sealed waterproof structure is formed between the hub 2 and the housing 1, and the integral structure of the connection of the hub 2, the terminal 3 and the switch assembly 4 is installed in an inserting manner, so that the micro switch is simple and convenient to assemble, the button 5 is inserted into the housing 1 from the outer side of the housing 1 through the button installation opening 12 to be connected with the switch assembly 4, and the second sealing element 7 is arranged between the button 5 and the housing 1, so that the sealing between the button 5 and the housing 1 is realized, and the waterproof performance between the button 5 and the housing 1 is ensured.

Referring to fig. 2 ~ 6, a circle of mounting grooves 21 is arranged on the periphery of the needle holder 2 for mounting the first sealing element 6, the first sealing element 6 is a sealing ring, such as a silica gel sealing ring, a plurality of mounting grooves 21 are preferably arranged, so that a plurality of first sealing elements 6 are mounted between the periphery of the needle holder 2 and the inner side of the housing 1, and the waterproof performance is further improved, the size of the sealing ring is consistent with that of the periphery of the mounting groove 21 on the needle holder 2, the depth of the mounting groove 21 is smaller than that of the sealing ring, so that the first sealing element 6 can be sleeved on the mounting groove 21, and when the needle holder 2 is inserted into the needle holder socket 11, the first sealing element 6 is clamped between the first sealing element and the mounting groove 21, one side of the first sealing element 6, which is far away from the mounting groove 21, is abutted against the inner wall of the needle holder socket 11, so that the first sealing element 2 and the housing 1 can be sealed through the first sealing element 6, and the waterproof performance between the first sealing element and the housing 1 can be realized, the needle holder 2 and the housing 1 can be connected in a clamping manner, a clamping block 22 is arranged on the needle holder 2 is arranged on the housing 1, a clamping hole 13 is arranged, so that the needle holder 2 can be clamped with the mounting boss 14, and a limit switch assembly can be properly assembled until the needle holder 2 is inserted into the boss 14, and the boss 14.

Referring to fig. 2 and 3, the second sealing member 7 is preferably a silicone cap, which easily meets the requirement of the movement of the button 5. When the second sealing element 7 adopts a silica gel cap, one end of the silica gel cap is fixed on the inner side of the button installation opening 12 and can be fixed in an adhesion mode; the other end of the silica gel cap is sleeved on the periphery of the button 5 and can also be connected in a bonding mode, preferably, a button sleeve 51 is sleeved on the periphery of the button 5, the button 5 can freely move in the button sleeve 51, one end of the silica gel cap, which is connected with the button mounting opening 12, is clamped between the outer side of the button sleeve 51 and the inner side of the button mounting opening 12, and the silica gel cap and the button mounting opening 12 are tightly pressed through the button sleeve 51 to form a sealed structure. Thereby, the sealing connection between the button 5 and the shell 1 is realized, and the waterproof performance of the position between the button 5 and the shell is ensured.

Referring to fig. 1 ~ 8, the terminal 3 includes a normally closed terminal 31, a normally open terminal 32 and a common terminal 33, the normally closed terminal 31, the normally open terminal 32 and the common terminal 33 are arranged on the needle base 2 in parallel, one end of the normally closed terminal 31, the normally open terminal 32 and the common terminal 33 extend out of the needle base 2 to facilitate connection with an external circuit, the other end of the normally closed terminal 31, the normally open terminal 32 and the common terminal 33 are connected with the switch assembly 4, and the switch assembly 4 is connected with the switch assembly 4.

Referring to fig. 7, the switch assembly 4 includes a moving plate 41 and a supporting rod 42. The moving plate 41 can be formed by punching a metal sheet, and the two sides of the moving plate 41 in the length direction are provided with side plates 414 to enhance the strength of the structure; the slot 411 in the middle of the moving plate 41 is a through slot, and one side of the slot 411 is provided with a spring plate 412, and the other side 413 is mounted with the supporting rod 42. The elastic piece 412 may be a structure integrated with the moving piece 41, and is reserved during punch forming; or a spring plate 412 can be made separately and installed at one side in the slot 411 during assembly. The former configuration is preferred to make the microswitch with fewer parts and easier to assemble, as explained in the previous embodiment.

Referring to fig. 8, the supporting rod 42 may also be made of a metal sheet by stamping, and a square hole 424 is punched at the middle position to avoid the common terminal 33, so as to prevent the supporting rod 42 from being influenced by the common terminal 33 and being unable to operate normally after being assembled. The support rod 42 is provided with a bending end 421, and the bending end 421 is connected with the moving plate 41; the bent end 421 is laterally provided with a notch 422, and the bent end 421 is snapped into the slot 411 through the notch 422. The bending end 421 is a one-time bending structure, that is, only one bending angle is provided, and the one-time bending structure can improve the manufacturing precision of the strut 42. The end of the strut 42 opposite the bent end 421 is provided with a mounting slot 423 to facilitate connection with the common terminal 33. The support rod can be applied to other existing micro switches besides the micro switch in the embodiment.

Referring to fig. 2 ~ 4, 7 and 8, during assembly, the free end of the spring plate 412 abuts against the bending part a at the upper end of the mounting end 331 of the common terminal (the spring plate 412 and the mounting end 331 can rotate relatively), the mounting slot 423 of the strut 42 is supported near the bending part b at the middle part of the mounting end 331 (the mounting end 331 is provided with a slot in which the strut 42 abuts and can rotate inside the slot), the bending end 421 of the strut 42 is clamped into one side 413 of the slot 411 (the two can also rotate relatively), the rotor 41 is arranged between the normally closed terminal 31 and the normally open terminal 32 and can abut against and conduct with the normally closed terminal 31 or the normally open terminal 32, and the normally open terminal 32, the common terminal 33 and the rotor 41 are preferably provided with raised contact structures 8, so that the electrical contact between the rotor and the terminals during switching is easier and more reliable.

Referring to fig. 2, the microswitch works as follows: under the natural state, due to the elastic action of the elastic sheet 412 and the supporting action of the supporting rod 42, the moving sheet 41 is abutted to the normally closed terminal 31, and the current can sequentially pass through the common terminal 33, the supporting rod 42, the moving sheet 41 and the normally closed terminal 31, so that the conduction between the common terminal 33 and the normally closed terminal 31 is realized; when the button 5 is pressed, the bending end 421 of the strut 42 is pressed, the moving plate 41 is also pressed to be in contact with the normally open terminal 32 and to be disconnected from the normally closed terminal 31 in an interlocking manner, and at the moment, the current can sequentially pass through the common terminal 33, the strut 42, the moving plate 41 and the normally open terminal 32, so that the common terminal 33 and the normally open terminal 32 are conducted.

Referring to fig. 1 ~ 8, the microswitch of the present embodiment is assembled by molding each terminal in a needle base 2, mounting a switch assembly 4 on a terminal 3 to form an integrated structure of the terminal, the needle base and the switch, sleeving a first sealing member on the needle base, inserting the integrated structure into the housing 1 from a needle base insertion opening 11, and assembling a button 5, a button sleeve 51 and a second sealing member 7 to form a complete microswitch, wherein the microswitch is mounted in a button mounting opening 12.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A micro-gap switch with waterproof function which characterized in that: the switch comprises a shell (1), a needle seat (2), a terminal (3), a switch component (4) and a button (5), wherein the terminal (3) is arranged on the needle seat (2) in a plastic-coated mode, and the switch component (4) is arranged on the terminal (3); a needle seat socket (11) and a button installation opening (12) are arranged on the shell (1), the whole structure formed by connecting the needle seat (2), the terminal (3) and the switch assembly (4) is inserted into the shell (1) through the needle seat socket (11), and a first sealing element (6) is arranged between the needle seat (2) and the shell (1); the button (5) is inserted into the inner side of the shell (1) from the outer side of the shell (1) through a button mounting opening (12) and is connected with the switch assembly (4), and a second sealing piece (7) is arranged between the button (5) and the shell (1).

2. The microswitch with waterproof function according to claim 1, wherein: the outer periphery of needle file (2) is provided with round mounting groove (21), first sealing member (6) are the sealing washer, first sealing member (6) cover is established on mounting groove (21) to the butt is between needle file (2) and shell (1).

3. The microswitch having a waterproof function according to claim 2, wherein: the periphery of the needle seat (2) is provided with a plurality of installation grooves (21), and each installation groove (21) is provided with a first sealing element (6).

4. The microswitch with waterproof function according to claim 3, wherein: a clamping block (22) is arranged on the needle seat (2), a clamping hole (13) is formed in the shell (1), and the clamping block (22) can be clamped into the clamping hole (13).

5. The microswitch with waterproof function according to claim 1, wherein: the second sealing element (7) is a silica gel cap, one end of the second sealing element (7) is fixed on the inner side of the button installation opening (12), and the other end of the second sealing element is sleeved on the periphery of the button (5).

6. The microswitch having a waterproof function according to claim 5, wherein: the button (5) periphery still overlaps and is equipped with button cover (51), position between button cover (51) outside and button installation opening (12) inboard is connected to second sealing member (7) one end joint.

7. The microswitch with the waterproof function according to claim 1 ~ 6, wherein the terminal (3) comprises a normally closed terminal (31), a normally open terminal (32) and a common terminal (33), and the normally closed terminal (31), the normally open terminal (32) and the common terminal (33) are arranged on the needle holder (2) in parallel.

8. The microswitch having a waterproof function according to claim 7, wherein: the public terminal (33) is provided with a zigzag mounting end (331) at the inner side of the needle seat (2); the switch assembly (4) comprises a moving plate (41) and a support rod (42), a slot (411) is formed in the moving plate (41), an elastic sheet (412) is arranged on one side in the slot (411), and the free end of the elastic sheet (412) abuts against the mounting end (331); one end of the supporting rod (42) is supported on the mounting end (331), and the other end of the supporting rod is supported on the other side, opposite to the elastic sheet (412), in the slot (411); the moving piece (41) is arranged between the normally closed terminal (31) and the normally open terminal (32).

9. The microswitch having a waterproof function according to claim 8, wherein: be provided with end (421) of buckling on branch (42), end (421) of buckling is once the structure of buckling, end (421) side of buckling is provided with notch (422), end (421) of buckling is gone into in fluting (411) through notch (422) card.

10. The microswitch with waterproof function according to claim 9, wherein: the supporting rod (42) is further provided with a square hole (424) used for avoiding the supporting rod (42).