Long-life waterproof switch

Abstract

The utility model discloses a waterproof switch with a long service life. The waterproof switch comprises a base, a contact elastic sheet, a plunger and a waterproof sleeve, the base is provided with an electrical cavity, and the center and the edge of the electrical cavity are respectively provided with a center contact and an edge contact; the contact elastic sheet comprises a horizontal part and a protruding part, the horizontal part is located at the edge of the protruding part, the horizontal part is in surface contact with the bottom surface of the electrical containing cavity, the horizontal part is in contact connection with the edge contact, an insulation gap exists between the protruding part and the center contact, and the protruding part is in contact connection with the center contact through pressing; the plunger is arranged between the contact elastic sheet and the waterproof sleeve; the waterproof sleeve is arranged on the upper surface of the base. According to the waterproof switch, the contact spring is in surface contact with the bottom surface of the electrical cavity, so that the frictional loss between the contact spring and the inner wall of the electrical cavity can be greatly reduced, and the service life of the waterproof switch is further prolonged. In addition, the structure of the contact spring can reduce the occupied space, thereby reducing the size of the waterproof switch, and the waterproof switch has the characteristics of simple structure and thinness.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of microswitch, especially to a long-life waterproof switch. BACKGROUND

[0002] The microswitch is a kind of electronic switch, belongs to electronic component class.Microswitch has the advantages such as small contact resistance, accurate operating force error, specification diversification, is widely applied in electronic equipment and white goods such as audio-video product, digital product, remote controller, communication product, household appliance, security product, toy, computer product, fitness equipment, medical equipment, banknote detector, laser pen key etc.Because the microswitch is to the environmental condition (pressure less than 2 times elastic force / environmental temperature and humidity condition and electrical performance) large equipment and high load button are directly replaced by conductive rubber or pot switch hardware spring piece, such as medical equipment, television remote controller etc.

[0003] As shown in Figure 1 When pressing waterproof cover 3', plunger 4' drives contact spring 2' to recess, so that contact spring 2' connects the contact on base 1', thereby realizing the connection of waterproof switch.But in the process of contact spring 2' pressing recess and rebound, because there is inclined dynamic friction between the end of contact spring 2' and the inner wall of base 1', contact spring 2' is continuously abraded in the use process, thereby reducing the service life of waterproof switch, and there is certain defect. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a long-life waterproof switch to reduce the abrasion between contact spring and base and prolong the service life of waterproof switch.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A long-life waterproof switch, comprising base, contact spring, plunger and waterproof cover;

[0007] The base has electrical cavity, and the center and edge of the electrical cavity are respectively provided with center contact and edge contact;

[0008] The contact spring comprises horizontal part and raised part, and the horizontal part is located at the edge of the raised part, the horizontal part is in surface contact with the bottom surface of the electrical cavity, and the horizontal part is in contact connection with the edge contact, and there is insulation gap between the raised part and the center contact, and the raised part is in contact connection with the center contact by pressing;

[0009] The plunger is arranged between the contact spring and the waterproof cover, and the plunger is used to transmit pressing power to the contact spring.

[0010] The waterproof sleeve is fixedly arranged on the upper surface of the base, and is used for sealing the opening of the electrical cavity.

[0011] Further, the center contact has a protrusion, and the protrusion is higher than the bottom surface of the electrical cavity.

[0012] Further, the base is externally provided with two groups of connecting pins, and the two groups of connecting pins are respectively connected with the center contact and the edge contact.

[0013] Further, the contact spring is provided with multiple layers, and the multiple layers of the contact spring are arranged in a stacked manner.

[0014] Further, the horizontal part and the raised part are integrally formed.

[0015] Further, the raised part is provided with a voltage stabilizing hole at a center position.

[0016] Further, the waterproof sleeve is provided with a positioning cavity at a center position, and the plunger is located in the positioning cavity.

[0017] Compared with the prior art, the long-life waterproof switch has the following beneficial effects:

[0018] The contact spring of the long-life waterproof switch is in surface contact with the bottom surface of the electrical cavity, so that the friction loss between the contact spring and the inner wall of the electrical cavity can be greatly reduced, and the service life of the waterproof switch is prolonged. In addition, the structure of the contact spring can reduce the space occupation, thereby reducing the volume of the waterproof switch, and the long-life waterproof switch has the characteristics of simple structure and thin type. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a waterproof switch structural schematic view in the prior art;

[0020] Figure 2 It is a long-life waterproof switch structural explosion view of the utility model;

[0021] Figure 3 It is a contact spring structural schematic view of the long-life waterproof switch of the utility model.

[0022] In the drawing: 1, base; 2, contact spring; 3, plunger; 4, waterproof sleeve; 5, electrical cavity; 6, center contact; 7, edge contact; 8, horizontal part; 9, raised part; 10, protrusion; 11, connecting pin; 12, voltage stabilizing hole; 13, positioning cavity. DETAILED DESCRIPTION

[0023] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments.

[0024] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0025] Embodiment:

[0026] As shown in Figure 2 and Figure 3 The utility model embodiment proposes a long -life waterproof switch, including base 1, contact spring 2, plunger 3 and waterproof cover 4.

[0027] Specifically, the base 1 has electrical cavity 5, and the center and the edge of the electrical cavity 5 are respectively provided with center contact 6 and edge contact 7.

[0028] Contact spring 2 includes horizontal part 8 and bulge 9, and the horizontal part 8 is located at the edge of the bulge 9, the horizontal part 8 is in contact with the bottom surface of the electrical cavity 5, and the horizontal part 8 is connected with the edge contact 7, and there is an insulating gap between the bulge 9 and the center contact 6, and the bulge 9 is connected with the center contact 6 by pressing.

[0029] Plunger 3 is arranged between contact spring 2 and waterproof cover 4, and plunger 3 is used to transmit pressing power to contact spring 2.

[0030] Waterproof cover 4 is fixedly arranged on the upper surface of base 1, and waterproof cover 4 is used to seal the opening of electrical cavity 5.

[0031] In the embodiment, the horizontal part 8 of the bottom edge of the contact spring 2 is in surface contact with the bottom surface of the electrical cavity 5, which can reduce the wear between the horizontal part 8 and the inner wall of the electrical cavity 5 during the pressing and rebounding of the contact spring 2, thereby prolonging the service life of the waterproof switch. In addition, the horizontal part 8 is in surface contact, which can make the contact spring narrower than the end dynamic friction and the folding edge technology in the prior art, so as to reduce the width of the top end of the contact spring 2, thereby reducing the overall projection area of the waterproof switch, and having the characteristics of thin type.

[0032] When the waterproof switch is in use, pressing the raised part 9 causes it to indent and come into contact with the center contact 6. At this time, the center contact 6 and the edge contact 7 are electrically connected through the contact spring 2, and the waterproof switch is turned on. When the pressure applied to the raised part 9 is removed, the raised part 9 rebounds due to its own elasticity, separating from the center contact 6, and the waterproof switch is turned off.

[0033] In one specific embodiment, the center contact 6 has a protrusion 10, which is higher than the bottom surface of the electrical cavity 5. The protrusion 10 of the center contact 6 allows for easy contact between the raised portion 9 and the center contact 6 with slight pressure, preventing the raised portion 9 from being deformed due to excessive pressure and unable to spring back, thereby extending the service life of the waterproof switch.

[0034] In addition, the base 1 has two sets of connection pins 11 on its exterior, and the two sets of connection pins 11 are respectively connected to the center contact 6 and the edge contact 7. The two sets of pins are connected in series in the circuit, and the waterproof switch is turned on and off by pressing and releasing the raised part 9.

[0035] It should be noted that the waterproof sleeve 4 and the base 1 are sealed together with sealant. Since the waterproof sleeve 4 seals the opening of the electrical cavity 5, it can effectively prevent liquid from seeping into the electrical cavity 5, thus providing a good waterproof effect.

[0036] Furthermore, the contact spring 2 is provided with multiple layers, and the multiple contact springs 2 are stacked together.

[0037] Specifically, the contact spring 2 is stacked in multiple layers, which can enhance the overall rigidity of the contact spring 2, increase the effective pressing number of the contact spring 2, and thus extend the service life of the waterproof switch.

[0038] Furthermore, the horizontal part 8 and the raised part 9 are integrally formed.

[0039] Specifically, the horizontal part 8 and the raised part 9 are integrally formed, which can improve the mechanical strength of the contact spring 2 and thus extend the service life of the contact spring 2.

[0040] In addition, a pressure stabilizing hole 12 is provided at the center of the raised part 9. During the pressing and rebounding process of the raised part 9, the two sides of the raised part 9 are connected through the pressure stabilizing hole 12, which can keep the air pressure on both sides of the raised part 9 equal during the pressing and rebounding process, ensuring that the raised part 9 can be quickly pressed in and rebounded, thereby realizing the rapid response of the waterproof switch.

[0041] Furthermore, a positioning cavity 13 is provided at the center of the waterproof sleeve 4, and the plunger 3 is located inside the positioning cavity 13.

[0042] Specifically, plunger 3 is located inside positioning cavity 13, and plunger 3 contacts the center of the top of raised portion 9. During the pressing of waterproof sleeve 4, plunger 3 drives the center of raised portion 9 to indent, thereby connecting with the center contact 6 and connecting the circuit. During the rebound of raised portion 9, waterproof sleeve 4 positions plunger 3, causing plunger 3 to rebound to its original position, ensuring the stable use of the waterproof switch.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] The contact spring of this invention makes surface contact with the bottom surface of the electrical cavity, which can greatly reduce the frictional loss between the contact spring and the inner wall of the electrical cavity, thereby extending the service life of the waterproof switch. In addition, the structure of the contact spring can reduce the space occupied, thereby reducing the size of the waterproof switch, and it has the characteristics of simple structure and thin profile.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A long-life waterproof switch, characterized in that, Includes a base (1), a contact spring (2), a plunger (3), and a waterproof sleeve (4); The base (1) has an electrical cavity (5), and a center contact (6) and an edge contact (7) are respectively provided at the center and the edge of the electrical cavity (5). The contact spring (2) includes a horizontal part (8) and a raised part (9), and the horizontal part (8) is located at the edge of the raised part (9). The horizontal part (8) is in contact with the bottom surface of the electrical cavity (5), and the horizontal part (8) is in contact with the edge contact (7). There is an insulating gap between the raised part (9) and the center contact (6), and the raised part (9) is in contact with the center contact (6) by pressing. The plunger (3) is disposed between the contact spring (2) and the waterproof sleeve (4), and the plunger (3) is used to transmit pressing power to the contact spring (2); The waterproof sleeve (4) is fixedly installed on the upper surface of the base (1), and the waterproof sleeve (4) is used to seal the opening of the electrical cavity (5).

2. The long-life waterproof switch as described in claim 1, characterized in that, The center contact (6) has a protrusion (10) and the protrusion (10) is higher than the bottom surface of the electrical cavity (5).

3. The long-life waterproof switch as described in claim 1, characterized in that, The base (1) is provided with two sets of connection pins (11) on the outside, and the two sets of connection pins (11) are respectively connected to the center contact (6) and the edge contact (7).

4. The long-life waterproof switch as described in claim 1, characterized in that, The contact spring (2) is provided in multiple layers, and the multiple contact springs (2) are stacked together.

5. The long-life waterproof switch as described in claim 1, characterized in that, The horizontal portion (8) and the raised portion (9) are integrally formed.

6. The long-life waterproof switch as described in claim 1, characterized in that, A pressure stabilizing hole (12) is provided at the center of the raised part (9).

7. The long-life waterproof switch as described in claim 1, characterized in that, The waterproof sleeve (4) has a positioning cavity (13) at its center, and the plunger (3) is located inside the positioning cavity (13).

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