CN217035461U - Moisture-proof light-touch switch - Google Patents

Abstract

The utility model discloses a damp-proof light-touch switch, which comprises a base and a key of the light-touch switch, wherein a key cavity is arranged in the base, a cover plate which is fixed at an opening of the key cavity and limits the moving stroke of the key with one end positioned in the key cavity is also arranged on the base, the key is provided with an inner groove, an insulating cavity is also arranged in the key cavity, a plurality of contacts are arranged in the insulating cavity, the other ends of the contacts extend out of the base to form a pin terminal which is connected with a circuit board, an isolating silica gel film is arranged on the insulating cavity, an inner handle is also arranged in the insulating cavity, the inner handle is fixedly arranged relative to the key, and the inner handle and the key clamp the isolating silica gel film; according to the light-touch switch, the silica gel isolation film is arranged inside the light-touch switch in a touch mode in the inner handle, compared with the design that the silica gel film is coated on the surface of the key in the prior art, the contact between the silica gel film and the outside is reduced, the problems of quick abrasion and external force damage of the silica gel film are avoided, and the service life of the key is prolonged.

Description

Moisture-proof light-touch switch

Technical Field

The utility model relates to the technical field of electronic devices, in particular to a moisture-proof light-touch switch.

Background

The light touch switch is widely applied to control panels of household appliances and industrial electronic instruments as a common electronic component, particularly, household appliances and instruments such as electronic scales, washing machines, smoke exhaust ventilators, electric cookers and the like can contact water, dust and oil stains in the use process, and after the dirt enters the light touch switch, the dirt can corrode contacts and reeds in the switch, so that the switch is in poor contact and short circuit to cause the abnormal use of the related appliances and instruments, and the problem of the normal work of the household appliances and instruments is solved.

At present, a tact switch with a protection design appears in the market, such as a moisture-proof tact switch of CN201420826082.0 in chinese patent: it discloses one kind through can make the button inner chamber include the button and the external silica gel layer of keeping apart at the outer cladding setting of button, realizes inside and outside complete isolation through silica gel, but the design of this kind of silica gel overcoat, in actual production, because, long-term press wear and tear make the silica gel attenuation and receive external water, the filth of taking the corruption silica gel nature and lead to the silica gel damage.

SUMMERY OF THE UTILITY MODEL

In view of the prior art, the utility model aims to provide a light touch switch with high moisture-proof and antifouling functions, wherein the inner contacts are contacted to realize circuit communication through pressing keys on the surface.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a dampproofing switch that dabs, is including dabbing the base and the button of switch, be provided with the button chamber in the base, still be provided with on the base and be fixed in button chamber opening part, the apron that restriction one end is located the button activity stroke of button intracavity, the button has the inside groove, the button intracavity still is provided with insulating chamber, insulating intracavity is provided with a plurality of contacts, the other end of contact stretches out the base and constitutes the pin terminal of being connected with the circuit board outside the base, be provided with the isolation pellosil on the insulating chamber, still be provided with the inner handle in the insulating chamber, the relative button of inner handle is fixed to be set up, and inner handle and button centre gripping isolation pellosil setting.

As a further arrangement of the scheme, a spring for driving the key to reset is further arranged in the key cavity, and the bottom of the insulating cavity is provided with an elastic sheet which is opposite to the inner handle.

As a further arrangement of the scheme, the springs are arranged to enable the two ends of each spring to abut against the bottom of the key cavity and the end of each key to drive the keys to reset, and the springs are circumferentially and uniformly distributed relative to the keys.

In a further arrangement of the above arrangement, the bottom of the inner groove of the key and the end face of the inner handle opposite to each other are provided with a magnet a and a magnet B which are mutually attracted.

As a further configuration of the above solution, the contact is an arc-shaped elastic member, which is continuously abutted against the side surface of the inner handle, and the inner handle is movable relative to the contact and is provided with a conducting area and an insulating area.

As a further arrangement of the scheme, a sealing ring is further arranged on the outer side wall of the insulating cavity, and the sealing ring is matched and sealed with the inner side wall of the key.

Has the advantages that: according to the light touch switch, the silicon membrane is arranged in the key, the inner handle is arranged for triggering, the sensitivity of the key is ensured, meanwhile, based on the design of the built-in silicon membrane, the moisture-proof light touch switch in the prior art is prevented, the silicon membrane is directly contacted with an external component and a finger when the silicon membrane is pressed, and the silicon membrane is rolled, extruded or cut and abraded by sundries and the component, and the sealing performance of the silicon gel is weakened and disappeared due to the influence of liquid and impurities which are possibly carried on the finger and corrode the silicon gel, so that the moisture-proof function cannot be well realized, and the service life is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a tact switch of the present invention.

Fig. 2 is a schematic cross-sectional view of a tact switch according to the present invention.

Reference numerals are as follows: 1. a base; 2. pressing a key; 25. a spring; 3. a cover plate; 4. a key cavity; 5. an inner tank; 6. an insulating cavity; 61. isolating the silica gel film; 62. an inner handle; 64. a spring plate; 65. a magnet B; 66. a magnet A; 68. a seal ring; 7. a contact; 71. a conducting region; 72. an insulating region; 9. and a pin terminal.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.

As shown in fig. 1-2, the tact switch of this embodiment includes a base 1 and a key 2, the base 1 is provided with a key cavity 4, the base 1 of the tact switch of this embodiment is further provided with an opening fixed in the key cavity 4 for limiting the key 2 with one end located in the key cavity 4, and a cover plate 3 relatively far away from the moving stroke of the key cavity 4, the hollow of the cover plate 3 is larger than the rod portion of the key 2 and smaller than the ring edge portion of the key 2 located in the key cavity 4, so that the key 2 keeps moving in the key cavity 4 before the cover plate 3 is removed, the key 2 is provided with an inner groove 5, the key cavity 4 is further provided with an insulating cavity 6, the inner groove 5 and the insulating cavity 6 are arranged relatively, the insulating cavity 6 is provided with a plurality of contacts 7, the other end of the contact 7 extends out of the base 1 to form a pin terminal 9 connected to a circuit board, be provided with isolation pellosil 61 on the insulating chamber 6, still be provided with interior handle 62 in the insulating chamber 6, interior handle 62 is at insulating chamber 6 and the 5 internalization of inside groove, and is based on the fixed setting of the relative button 2 of interior handle 62, consequently, interior handle 62 can be along with the lift of pressing down realization relative insulating chamber 6 of button 2, and interior handle 62 in this embodiment and the setting of 2 centre gripping isolation pellosil 61 of button, through the design with insulating chamber 6 lateral wall totally enclosed isolation external world, realized the activity of interior handle 62 in insulating chamber 6, can not contact with the external world simultaneously, based on interior handle 62 and the 2 centre gripping isolation pellosil 61 of button, also avoided isolation pellosil 61 to appear wearing and tearing damaged problem.

As a further arrangement of the above scheme, the key cavity 4 is further provided with a spring 25 for driving the key 2 to reset, the bottom of the insulating cavity 6 is provided with a spring sheet 64 facing the inner handle 62, the significance of the arrangement of the spring sheet 64 in the present invention lies in providing an upward thrust for the inner handle 62, the inner handle 62 can be driven to move upward to keep an insulating state without pressing the key 2, and secondly, the spring sheet 64 can also be used as a prompt for the successful pressing of the tact switch, compared with the prior art, the present invention further provides a spring 25 for driving the key 2 to reset, the spring 25 is provided with a plurality of springs with two ends abutting against the bottom of the key cavity 4 and the end of the key 2 for driving the key 2 to reset, the springs 25 are circumferentially and uniformly distributed relative to the key 2, and compared with the reset design of the prior art through reeds, the service life of the spring 25 is far longer than that of the reeds, secondly, the spring 25 is one-way in expansion and contraction and does not fear long-term pressing, and the spring plate is easily deformed by excessive pressing or continuous pressing operation, resulting in a reduction in service life.

As a further arrangement of the above scheme, the magnets a66 and B65 are arranged on the end faces of the bottom of the inner groove 5 of the key 2 and the inner handle 62, which are opposite to each other, and the magnets are designed to fix the inner handle 62 and the bottom of the inner groove 5 of the key 2 relatively, so that the accurate operation of ensuring the on-off of the tact switch is realized by the attraction of magnetic force and the matching of the elastic sheet 64.

As the further setting of above-mentioned scheme, contact 7 is circular-arc elastic component setting, and it lasts the looks butt with interior handle 62 side, interior handle 62 is movable relative to contact 7, and is provided with conducting area 71 and insulating area 72 on it, the utility model discloses a contact 7 sets up to circular-arc elastic component, and the elastic component lasts the butt on interior handle 62, and keeps the butt state, through the upper and lower activity of drive interior handle 62, realizes the switching of butt department, realizes switching on or not of control circuit, and relative prior art, contact 7 lasts the design of butt for it does not have the change of elastic expansion deformation, has reduced the condition of metal fatigue, has prolonged the life of tact switch.

As the further setting of above-mentioned scheme, insulating chamber 6 lateral wall still is provided with sealing washer 68, sealing washer 68 and 2 inside wall phase-match seal of button, the setting of sealing washer 68 makes button 2 press the in-process, forms a heavy supplementary seal between button 2 inside groove 5 and insulating chamber 6, has further promoted the dampproofing dustproof performance of product.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (6)

1. The utility model provides a dampproofing dabs switch which characterized in that: comprises a base (1) of a tact switch and a key (2), wherein a key cavity (4) is arranged in the base (1), the base (1) is also provided with a cover plate (3) which is fixed at the opening of the key cavity (4) and limits the movable stroke of the key (2) with one end positioned in the key cavity (4), the key (2) is provided with an inner groove (5), the key cavity (4) is also internally provided with an insulating cavity (6), a plurality of contacts (7) are arranged in the insulating cavity (6), the other ends of the contacts (7) extend out of the base (1) to form pin terminals (9) connected with the circuit board outside the base (1), an isolation silicon film (61) is arranged on the insulation cavity (6), an inner handle (62) is also arranged in the insulation cavity (6), the inner handle (62) is fixedly arranged relative to the key (2), and the inner handle (62) and the key (2) are arranged for clamping the isolation silica gel film (61).

2. The moisture resistant tact switch according to claim 1, wherein: a spring (25) for driving the key (2) to reset is further arranged in the key cavity (4), and an elastic sheet (64) which is right opposite to the inner handle (62) is arranged at the bottom of the insulating cavity (6).

3. The moisture-proof tact switch according to claim 2, wherein: the spring (25) is arranged to be in a reset motion of the bottom of the key cavity (4) and the end of the key (2), and the two ends of the spring (25) are abutted to the bottom of the key cavity and the end of the key (2) to drive the key (2), and the spring (25) is uniformly distributed relative to the key (2) in the circumferential direction.

4. The moisture resistant tact switch according to claim 1, wherein: the bottom of the inner groove (5) of the key (2) and the end face of the inner handle (62) opposite to each other are provided with a magnet A (66) and a magnet B (65) which are mutually adsorbed.

5. The moisture-proof tact switch according to claim 1, wherein: the contact (7) is arranged in an arc-shaped elastic piece and is continuously abutted against the side surface of the inner handle (62), and the inner handle (62) moves relative to the contact (7) and is provided with a conducting area (71) and an insulating area (72).

6. The moisture resistant tact switch according to claim 1, wherein: the outer side wall of the insulating cavity (6) is further provided with a sealing ring (68), and the sealing ring (68) is matched and sealed with the inner side wall of the key (2).

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