Waterproof combined switch on agricultural machine

Abstract

The application discloses a waterproof combined switch on an agricultural machine, which comprises an outer lower edge shell, an outer middle shell, an outer upper edge shell, an upper edge button with an annular sealing groove, a waterproof rubber ring, an inner upper edge tube sleeve, an inner middle tube sleeve, an inner lower edge tube sleeve, a tube core, a tube core spring containing contacts and the contacts, the contacts are installed inside the upper edge button and on the tube core spring, the axial movement of the button drives the tube core spring to produce radial compression, the tube core spring is fixed on the tube core, the contacts can be stretched and contracted due to the radial compression of the tube core spring, the waterproof rubber ring is fixed in the annular sealing groove of the upper edge button and is in contact with the outer upper edge shell to provide waterproof capacity. The application meets the existing process conditions of agricultural machine manufacturing and provides sufficient waterproof capacity for agricultural machine products.

Description

Technical Field

[0001] This invention relates to a waterproof combination switch for agricultural machinery. Background Technology

[0002] To achieve multiple control functions of agricultural machinery while meeting good ergonomic requirements, mechanical switches and electrical switches are typically combined to trigger different functions. However, in field operations, dust and liquid splashes are unavoidable. While this has a relatively small impact on mechanical control switches, it significantly affects the reliability of electrical switches. Therefore, the electrical switch portion of the combined switch needs to have good waterproof and dustproof capabilities. Existing technologies typically improve reliability under dust and liquid splash conditions by increasing the contact area when the electrical switch is on and the contact gap when it is off. However, since the electrical and mechanical switches are integrated into the same combined switch structure, this design increases the design and manufacturing requirements of the mechanical control component, thereby increasing the overall manufacturing cost. Furthermore, this method primarily addresses the impact of dust and liquid by improving the fault tolerance of the contacts themselves, and cannot directly prevent contaminants from entering the switch, thus its waterproof and dustproof capabilities remain insufficient. Summary of the Invention

[0003] The present invention achieves the above-mentioned technical problem through the following technical solution:

[0004] A waterproof combination switch for agricultural machinery:

[0005] The present invention discloses a waterproof combination switch for agricultural machinery, including an outer lower edge shell (1), an outer middle shell (2), an outer upper edge shell (4), an upper edge button (5) with an annular sealing groove (12), a waterproof rubber ring (13), an inner upper edge sleeve (6), an inner middle sleeve (7), an inner lower edge sleeve (9), a core (8), a core spring (3) containing contacts, and contacts (10, 11).

[0006] Its features are:

[0007] The outer lower edge shell (1), inner lower edge sleeve (9), outer middle shell (2), inner middle sleeve (7), outer upper edge shell (4), and inner upper edge sleeve (6) are sequentially combined to realize basic mechanical control functions and form a space to accommodate the core (8) and the circuit switch actuating parts.

[0008] The core (8) is housed in the aforementioned space and is fixedly connected to the inner tube sleeve. The core spring (3) with contact is fixed to the core (8), and the inner end of the upper edge button (5) is provided with a contact (11).

[0009] A waterproof rubber ring (13) is installed in the annular sealing groove (12) of the upper edge button (5). The upper edge button (5) is installed in the inner upper edge sleeve (6) and passes through the outer upper edge shell (4). The waterproof rubber ring (13) and the outer upper edge shell (4) maintain elastic contact to form a waterproof and dustproof function. The upper edge button (5) is provided with a contact (11) inside, and the core spring (3) is provided with a contact (10).

[0010] The contact (11) at the inner end of the upper edge button (5) cooperates with the contact (10) on the core spring (3). When the upper edge button (5) is pressed and moves axially into the combination switch, the contact (11) inside the upper edge button (5) moves downward and contacts the contact (10) on the core spring (3), causing the core spring (3) to undergo radial elastic deformation, which drives the conductive part of the core spring (3) to move downward, thereby turning on the circuit switch. When the upper edge button (5) is released, the core spring (3) returns to its initial position by its own elasticity, and the corresponding conductive part separates. The upper edge button (5) is reset, and the circuit switch returns to the open state.

[0011] Preferably, the waterproof rubber ring (13) is an O-ring waterproof rubber ring, the annular sealing groove (12) is provided along the outer periphery of the upper edge button (5), the waterproof rubber ring (13) protrudes out of the annular sealing groove (12) and forms an interference fit with the inner wall of the outer upper edge shell (4).

[0012] Preferably, the upper edge button (5) is installed in the inner upper edge sleeve (6) and can move axially along the inner upper edge sleeve (6); during the entire axial movement of the upper edge button (5), the waterproof rubber ring (13) remains in contact with the inner wall of the outer upper edge shell (4) to maintain a seal in both the button pressing and reset states.

[0013] Preferably, the contact axis on the core spring (3) is perpendicular to the radial deformation direction of the core spring (3); the contact at the inner end of the upper edge button (5) is in the same plane and parallel to the contact center line on the core spring (3), which is used to smoothly convert the axial displacement of the button into the radial pressure of the core spring.

[0014] The beneficial effects of this invention are:

[0015] The present invention provides a waterproof rubber ring (13) in the annular sealing groove (12) of the upper edge button (5) and keeps it in contact with the outer upper edge shell (4) to form a seal, thereby reducing the intrusion of pollutants caused by external splashing and dust, improving the waterproof and dustproof capabilities of the circuit switch part, without the need to increase the structural space of the circuit switch part, which is beneficial to reduce the impact on the design of the mechanical control part and reuse existing production lines and processes as much as possible. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall cross-sectional view of the present invention;

[0018] Figure 2 This is a partial cross-sectional view of the actuating part of the button and core spring (3) of the present invention;

[0019] Figure 1 In the middle: 1 is the lower outer shell (1), 2 is the middle outer shell (2), 3 is the core spring with contact (3), 4 is the upper outer shell (4), 5 is the upper edge button with an annular sealing groove (12) (5), 6 is the upper inner tube sleeve (6), 7 is the middle inner tube sleeve (7), 8 is the core (8), and 9 is the lower inner tube sleeve (9).

[0020] Figure 2 In the middle: 10 is the contact on the core spring (3), 11 is the contact of the upper edge button (5), 12 is the annular sealing groove (12), and 13 is the O-ring waterproof rubber ring (13). Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference manual attached Figure 1 It includes an outer lower edge housing (1), an outer middle housing (2), a core spring sheet (3) containing contacts, an outer upper edge housing (4), an upper edge button (5) with an annular sealing groove (12), an inner upper edge sleeve (6), an inner middle sleeve (7), a core (8), and an inner lower edge sleeve (9). The upper edge button (5) is nested in the outer upper edge housing (4) and protrudes to form an operable part.

[0023] Reference manual attached Figure 2An annular sealing groove (12) is provided on the outer periphery of the upper edge button (5). An O-ring waterproof rubber ring (13) is installed in the annular sealing groove (12). After assembly, the waterproof rubber ring (13) forms an interference contact with the recessed wall of the outer upper edge housing (4), thereby forming a seal between the upper edge button (5) and the outer upper edge housing (4). When the upper edge button (5) is pressed along the axial direction, the O-ring waterproof rubber ring (13) remains in the annular sealing groove (12) and contacts the recessed wall to prevent contaminants from entering the switch through the gap between the upper edge button (5) and the outer upper edge housing (4).

[0024] Reference manual attached Figure 1 The core spring (3) is located at the upper edge of the core (8), and the core spring (3) is provided with contacts for circuit conduction; when the upper edge button (5) moves along the axial direction, it acts on the core spring (3), causing the core spring (3) to undergo elastic deformation and change the contact state of its contacts; after the upper edge button (5) is released, the core spring (3) returns to its initial state by its own elasticity.

[0025] The core (8) continues to extend downward and passes through the inner middle sleeve (7) and the inner lower edge sleeve (9) in sequence. The inner middle sleeve (7) and the inner lower edge sleeve (9) are respectively matched with the outer middle shell (2) and the outer lower edge shell (1) to form the mechanical mounting structure at the bottom of the combination switch, thereby realizing the operation of the corresponding mechanical switch part in the combination switch.

[0026] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention based on the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art, as long as they do not depart from the spirit and scope of the present invention, should be included within the protection scope of the appended claims.

Claims

1. A combination switch, comprising an outer lower edge housing (1), an outer middle housing (2), a core spring (3), an outer upper edge housing (4), an upper edge button (5), an inner upper edge sleeve (6), an inner middle sleeve (7), a core (8), and an inner lower edge sleeve (9), characterized in that: The upper edge button (5) is nested in the outer upper edge shell (4), and a part of the upper edge button (5) protrudes from the outer upper edge shell (4) to form an operating part; The outer periphery of the upper edge button (5) is provided with an annular sealing groove (12), and a waterproof rubber ring (13) is provided inside the annular sealing groove (12); The core spring (3) is U-shaped and is located at the upper edge of the core (8). Each side of the core spring (3) is provided with a contact (10). Each end of the upper edge button (5) is provided with a contact (11). The two contacts (11) are respectively positioned opposite to the contacts (10) on the core spring (3). The upper end of the core (8) is located inside the upper edge button (5) and forms an overlapping area with the upper edge button (5). The core (8) passes downward through the inner middle tube sleeve (7) and the inner lower edge tube sleeve (9) in sequence. The inner middle tube sleeve (7) is disposed inside the outer middle shell (2), and the inner lower edge tube sleeve (9) is disposed inside the outer lower edge shell (1).

2. The combination switch according to claim 1, characterized in that, The waterproof rubber ring (13) is an O-ring waterproof rubber ring that makes interference contact with the recessed wall portion of the outer upper edge shell (4) and maintains the interference contact during the axial movement of the upper edge button (5).

3. The combination switch according to claim 1, characterized in that, The core spring (3) is U-shaped, with one end fixed to the core (8) and the other end being a conductive part that can change its axial position, used to control the circuit on and off.

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