Thin waterproof button switch for elevator

Abstract

The invention discloses a thin waterproof button switch for an elevator. The thin waterproof button switch comprises a button cap, a shell, a rubber cover, a printing plate, a screw, a waterproof check ring and a threaded sleeve, the button cap, the rubber cover and the printing plate are accommodated in the shell, the printing plate is arranged at the lower part of the shell, the upper surface of the printing plate is provided with a contact and an LED lamp, the rubber cover is arranged at the upper part of the printing plate, and the button cap is arranged at the upper part of the rubber cover; the shell, the rubber cover and the printing plate are fixed through screws; the button cap is clamped and fixed through a clamping groove reserved in the upper portion of the shell, and an avoiding space for the pressing stroke of button cap clamping feet is preset on the rubber cover. After being compressed, the rubber cover has an energy storage rebounding and resetting function; the waterproof check ring is arranged on the outer side of the shell; and the screw sleeve is arranged outside the shell and is used for fixing the waterproof button switch on an external panel. According to the waterproof button, the internal space of the waterproof button is greatly saved, the button can meet the waterproof requirement of IPX5, the overall thickness of the button is reduced, the assembly steps are simple, and the most economical cost can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to a thin waterproof push button switch for elevators. Background Art

[0002] Clause 5.11.2 of the national standard GBT 26465-2021 "Safety Specifications for the Manufacture and Installation of Firefighter Elevators" requires that "the car control device, the position indicator in the car, the position indicator at the firefighter entrance level, and the firefighter elevator switch shall have at least the IPX3 level of protection specified in GB / T 4208" and Clause 2.2.10 of GB 55037-2023 "General Code for Fire Protection of Buildings" requires that "the connection between the power and control cables of the elevator and the control panel, and the outer casing of the control panel shall have a waterproof performance level of not less than IPX5." The above national standards all put forward waterproof level requirements for the button components installed on the control panel.

[0003] Public document CN104444661 proposes an ultra-thin button structure. The traditional spring transmission structure is complex to assemble and is prone to rust and corrosion when exposed to water, which has a significant impact on the button pressing performance and cannot meet the requirements of waterproof standards.

[0004] Public document CN205335135 proposes a waterproof button structure, which uses a transmission part and a silicone elastic gasket for assembly and positioning, and forms a closed space through the pre-compression of the elastic gasket to achieve a waterproof effect. This structure requires good assembly accuracy, and the deformation of the elastic gasket during the button pressing action is also difficult to guarantee, and the reliability of the waterproof seal is not high. If a large pre-compression amount is reserved for the interference fit in order to achieve a waterproof effect, the button pressing force will increase and the feel will deteriorate.

[0005] The waterproof structure of a button generally occupies a large amount of internal assembly space, resulting in a thicker button overall, which affects the aesthetics of the component. At the same time, the large number of assembly parts leads to a cumbersome assembly process and a significant increase in costs. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a thin waterproof push button switch for an elevator, comprising a button cap, a shell, a rubber cover, a printing plate, screws, a waterproof retaining ring and a screw sleeve; the button cap, the rubber cover and the printing plate are accommodated in the shell, the printing plate is placed at the lower part of the shell, the upper surface of the printing plate is provided with contacts and an LED lamp, the rubber cover is placed at the upper part of the printing plate, and the button cap is placed at the upper part of the rubber cover; the shell, the rubber cover and the printing plate are fixed by screws; the button cap is fixed by clamping and connecting with a clamping groove reserved at the upper part of the shell, and the rubber cover is preset with an avoidance space for the pressing stroke of the button cap clamping foot; the rubber cover has an energy storage rebound reset function after being compressed; the waterproof retaining ring is arranged on the outer side of the shell; the screw sleeve is arranged on the outside of the shell, and is used to fix the waterproof push button switch on the external panel.

[0007] Preferably, the contact surface between the rubber cover and the printing plate has a concave-convex rib structure.

[0008] Preferably, the push button switch further includes a bottom plate.

[0009] Preferably, the button cap is made by a metal letter sheet stretching and integrated injection molding process.

[0010] Preferably, the inner side of the housing is provided with stepped surfaces around four sides for limiting the pressing stroke of the button cap.

[0011] Preferably, four positioning grooves are reserved at the lower part of the shell for installation and positioning of the rubber cover.

[0012] Preferably, the rubber cover is integrally stamped and formed.

[0013] Preferably, the rubber cover is made of a highly light-transmitting and light-homogenizing material.

[0014] Preferably, the screw sleeve has an internal thread, and the shell has an external thread matching the internal thread.

[0015] Compared with the prior art, the rubber cover in the thin waterproof push button switch structure for elevators of the present invention can store energy through deformation to realize the function of automatic rebound and reset, replacing the traditional spring structure. At the same time, the rubber cover has an integrated design, and the printing plate, rubber cover and shell are fastened by screws to form a reliable sealed waterproof space. This design can realize the dual functions of "transmission" and "waterproof", greatly saving internal space and improving assembly efficiency. The button can meet the waterproof requirements of IPX5, and the overall button thickness is only 11.5mm, the assembly steps are simple, and the cost can be the most economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0017] Figure 1 This is an exploded view of the thin waterproof push button switch structure for an elevator according to Example 1;

[0018] Figure 2 This is a cross-sectional view of the thin waterproof push button switch structure for elevators according to Example 1. DETAILED DESCRIPTION

[0019] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0020] Example 1

[0021] like Figure 1 and Figure 2 As shown, this embodiment provides a thin waterproof push button switch for an elevator, comprising a button cap 1, a housing 2, a rubber cover 3, a printed board 4, a bottom plate 5, a screw 6, a waterproof retaining ring 7 and a screw sleeve 8;

[0022] The button cap 1 is fixed by a slot 41 reserved on the upper part of the housing 2. The button cap adopts a metal letter sheet 42 stretched and integrally molded process, which can effectively avoid the risk of falling off due to failure of conventional glue or tape bonding process when exposed to water. A step surface 43 is reserved around the housing 2 to limit the pressing stroke when the front pressing force exceeds the normal value, thereby protecting the rubber cover and the contact.

[0023] The lower part of the outer shell 2 with external threads is loaded with a rubber cover 3, and the lower part of the outer shell 2 is reserved with 4 positioning grooves for installing and positioning the rubber cover 3. The rubber cover 3 is reserved with an avoidance space for the pressing stroke of the button cap foot.

[0024] The printing plate 4 and the bottom plate 5 are sequentially installed from the lower part of the housing 2 and are uniformly positioned and assembled through the positioning grooves. The outer shape of the rubber cover 3 is integrally stamped and formed, and the housing 2, the rubber cover 3, the printing plate 4 and the bottom plate 5 are fastened by screws 6 to form a reliable waterproof and closed space to prevent the printing plate with LED light from entering and short-circuiting. At the same time, the rubber cover can store energy through deformation to realize the function of automatic rebound and reset, replacing the traditional spring structure.

[0025] Preferably, the rubber cover 3 is made of a highly transparent and light-uniform material, which can make the LED light brightness uniform.

[0026] More preferably, the rubber cover 3 is designed with tiny concave-convex rib structures on the contact surface with the printing plate, so that the two can form a tight sealing effect when they are fitted together, and the overall structure can omit the bottom plate 5, which is more cost-effective.

[0027] The waterproofing between the entire button and the panel is mainly achieved by the O-type waterproof retaining ring 7. The button is installed on the panel, and the O-type waterproof retaining ring 7 is inserted into the outer side of the shell 2, and the O-type waterproof retaining ring 7 is tightened and fixed by the screw sleeve 8 so that the O-type waterproof retaining ring 7 is compressed and deformed to fill the gap between the button and the panel to achieve a sealing effect.

[0028] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A thin waterproof push button switch for an elevator, characterized in that: Including button cap, housing, rubber cover, printing plate, screws, waterproof retaining ring and screw sleeve; The button cap, rubber cover and printing plate are contained in the shell, the printing plate is placed at the lower part of the shell, the upper surface of the printing plate has contacts and LED lights, the rubber cover is placed at the upper part of the printing plate, and the button cap is placed at the upper part of the rubber cover; the shell, rubber cover and printing plate are fixed by screws; The button cap is fixed by a card slot reserved in the upper part of the housing, and a space for avoiding the pressing stroke of the button cap card foot is preset on the rubber cover; the rubber cover has an energy storage rebound reset function after being compressed; The waterproof retaining ring is arranged on the outside of the shell; the screw sleeve is arranged on the outside of the shell and is used to fix the waterproof button switch on the external panel.

2. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The contact surface between the rubber cover and the printing plate is provided with a concave-convex rib structure.

3. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The push button switch also includes a bottom plate.

4. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The button cap is made by a metal letter sheet stretching and integrated injection molding process.

5. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The inner side of the shell is provided with step surfaces around the periphery, which are used to limit the pressing stroke of the button cap.

6. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The lower part of the shell is provided with 4 positioning grooves for installing and positioning the rubber cover.

7. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The rubber cover is integrally stamped and formed.

8. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The rubber cover is made of a highly light-transmitting and light-homogenizing material.

9. The thin waterproof push button switch for elevator according to claim 1, characterized in that: The screw sleeve has an internal thread, and the shell has an external thread matching the internal thread.

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