A pressing structure for a push button switch

Abstract

The present application relates to a pressing structure for a button switch, and relates to the technical field of button switches, which comprises a pressing seat and a pressing rod, the pressing seat being provided with a pressing cavity for the pressing rod to be placed in, the upper end portion of the pressing rod being provided with a pressing cover, the pressing seat being provided with a pressing groove for the pressing cover to be placed in the inner edge of the upper opening of the pressing cavity; the pressing seat being provided with an elastic dust cap located above the pressing cover, the outer periphery of the elastic dust cap being provided with a flange bent toward one side and sleeved on the outer periphery of the pressing cover, and the outer periphery of the pressing seat being provided with a limiting sleeve for fixing the flange; in the present application, when the pressing structure is pressed, the outer surface of the elastic dust cap is pressed, thereby driving the pressing cover to be pressed downward, reducing the possibility of external dust or other impurities entering the pressing cavity through the space between the pressing cover and the pressing groove, thereby improving the dustproof performance of the pressing structure.

Description

Technical Field

[0001] The present application relates to the technical field of push button switches, and in particular to a pressing structure for a push button switch. Background Art

[0002] A push button switch is a main control electrical appliance with a simple structure and wide application. It uses a button to push the transmission mechanism to make the moving contact and the static contact connected or disconnected to achieve circuit switching. Push button switches are usually used to manually send control signals to control the connection and disconnection of the coil current of electrical appliances such as contactors, relays, and electromagnetic starters. In electrical automatic control circuits, push button switches play an important role.

[0003] In the related art, a push button switch includes a button seat, a button cap, a reset spring, a fixed contact, a movable contact, a housing, a supporting rod, and other parts. The button seat is provided with a pressing cavity for the button cap and the reset spring to be placed. In order to ensure that the button cap can be pressed down or reset upward normally, a gap is usually provided between the button seat and the button cap. The working principle is that when the button cap is pressed, the movable contact in the button cap is connected or disconnected with the fixed contact under the action of an external force, thereby controlling the current on and off of the circuit. When the external force is removed, the push button switch will return to its initial position under the action of the reset spring.

[0004] When push button switches are used in industrial and outdoor environments, external dust or other impurities can easily accumulate in the contact area between the button cap and the button seat. When dust and impurities enter the push button switch through the gap between the button cap and the button seat, they may adhere to the contacts or other key components inside the push button switch, causing poor contact or circuit breakage, affecting the performance of the push button switch. There is room for improvement. Utility Model Content

[0005] The purpose of the present application is to provide a pressing structure for a button switch to solve the problem in the above-mentioned related art that external dust or other impurities may enter the inside of the button switch through the gap, affecting the performance of the button switch.

[0006] The present application provides a pressing structure for a button switch using the following technical solution:

[0007] A pressing structure for a button switch comprises a pressing seat and a pressing rod, wherein the pressing seat is provided with a pressing cavity for the pressing rod to be placed therein, the upper end portion of the pressing rod is provided with a pressing cover, and the pressing seat is provided with a pressing groove for the pressing cover to be placed therein at the inner edge of the upper opening of the pressing cavity; the pressing seat is provided with an elastic dust cap located above the pressing cover, the outer periphery of the elastic dust cap is provided with a flange bent toward one side and sleeved on the outer peripheral surface of the pressing cover, and the outer periphery of the pressing seat is provided with a limiting sleeve for fixing the flange.

[0008] By adopting the above technical solution, due to the setting of the elastic dust cap, when the pressing structure is pressed, the outer surface of the elastic dust cap is pressed, thereby driving the pressing cover to be pressed downward, reducing the possibility of external dust or other impurities entering the pressing cavity through the space between the pressing cover and the pressing groove, improving the dustproof performance of the pressing structure, and then improving the performance of the control button using the pressing structure.

[0009] Optionally, a protrusion protruding away from the pressing cover is provided at the connection between the flange and the elastic dust cap.

[0010] By adopting the above technical solution, when the pressing structure is pressed, the outer surface of the elastic dust cap is pressed, thereby driving the pressing cover to be pressed downward. Due to the setting of the protrusion, the possibility of the connection between the elastic dust cap and the flange being stretched and permanently deformed is reduced, thereby increasing the service life of the elastic dust cap.

[0011] Optionally, a bending portion sleeved on the outer periphery of the pressing seat is provided on the edge of the flange, and a limiting ring bent toward its own axis is provided on the limiting sleeve, and the limiting ring is pressed against the inner side surface of the bending portion and the side surface of the bending portion away from the pressing seat.

[0012] By adopting the above technical solution, due to the coordinated arrangement of the limiting ring and the bending portion, when the elastic dust cap is fixed, the limiting ring is pressed against the inner side surface of the bending portion and the side surface of the bending portion away from the pressing seat, thereby reducing the possibility of the elastic dust cap being loosened during installation.

[0013] Optionally, a positioning convex ring is provided on the side of the pressing seat facing the bending portion.

[0014] By adopting the above technical solution, when the elastic dust cap is installed, the positioning convex ring on the pressing seat presses against the bent portion and causes it to deform, so that the limiting ring presses against the bent portion more firmly.

[0015] Optionally, an annular boss is provided on the side of the bending portion facing the limiting ring, and a limiting boss ring is provided on the side of the annular boss away from the bending portion.

[0016] By adopting the above technical solution, when the elastic dust cap is installed, the annular boss and the limiting convex ring on the bent portion are pressed tightly against the inner side surface of the limiting ring, further improving the assembly stability of the elastic dust cap.

[0017] Optionally, the pressing seat is provided with a rebound washer located inside the pressing groove, and the rebound washer is sleeved on the outer circumferential surface of the pressing rod; one side of the rebound washer is pressed against the bottom side of the pressing groove, and the other side of the rebound washer is pressed against the inner side surface of the pressing cover, and the outer circumferential surface of the rebound washer protrudes in the direction away from the pressing cover.

[0018] By adopting the above technical solution, due to the provision of the rebound washer, the entry of external dust or other impurities into the gap between the pressing rod and the side wall of the pressing cavity is further reduced, and the dustproof performance of the pressing structure is also further improved.

[0019] Optionally, a reciprocatingly folded rebound portion is provided in the middle of the outer circumference of the rebound washer.

[0020] By adopting the above technical solution, when the rebound force of the return spring inside the button switch weakens due to long-term use, the rebound performance of the rebound washer is improved due to the setting of the rebound part. At this time, the rebound washer can play the function of a return spring, thereby enhancing the performance of the button switch with the pressing structure.

[0021] Optionally, the rebound washer is provided with a first positioning protrusion on the side facing the bottom side of the pressing groove, and the pressing groove is provided with a first positioning ring groove for inserting the first positioning protrusion; the rebound washer is provided with a second positioning protrusion on the side facing the side wall of the pressing groove, and the pressing groove is provided with a second positioning ring groove for inserting the second positioning protrusion.

[0022] By adopting the above technical solution, when the rebound washer is fixed inside the pressing groove, the first positioning protrusion and the second positioning protrusion on the rebound washer are respectively inserted into the corresponding first positioning ring groove and second positioning ring groove, thereby realizing the assembly and fixation of the rebound washer and the pressing seat.

[0023] Optionally, the side edge of the rebound washer facing the pressing cover is provided with a bending portion sleeved on the outer periphery of the pressing cover, the bending portion is provided with a third positioning convex strip, and the pressing rod is provided with a third positioning ring groove for the third positioning convex strip to be inserted into.

[0024] By adopting the above technical solution, when the rebound washer is assembled with the pressing rod, the bent portion is sleeved on the outer circumference of the pressing rod, and at the same time, the third positioning protrusion on the bent portion is inserted into the third positioning ring groove on the pressing rod, thereby realizing the assembly and fixation of the rebound washer and the pressing rod.

[0025] Optionally, a reinforcing convex ring is provided on the outer periphery of the pressing rod.

[0026] By adopting the above technical solution, the structural strength of the pressing rod itself is improved and the service life of the pressing rod is extended.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Due to the setting of the elastic dust cap, when the pressing structure is pressed, the outer surface of the elastic dust cap is pressed, thereby driving the pressing cover to be pressed downward, reducing the possibility of external dust or other impurities entering the pressing cavity through the space between the pressing cover and the pressing groove, improving the dustproof performance of the pressing structure, and then improving the performance of the control button using the pressing structure.

[0029] 2. Due to the setting of the rebound washer, the entry of external dust or other impurities into the gap between the pressing rod and the side wall of the pressing cavity is further reduced, and the dustproof performance of the pressing structure is also further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0032] Figure 2 It is a schematic diagram of the explosion structure of Example 1 of the present application;

[0033] Figure 3 It is a cross-sectional structural schematic diagram of the installation and matching of the elastic dust cap in Example 1 of the present application;

[0034] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part A;

[0035] Figure 5 It is a schematic diagram of the overall structure of Example 2 of the present application;

[0036] Figure 6 It is a schematic diagram of the explosion structure of Example 2 of the present application;

[0037] Figure 7 is a schematic diagram of the explosion structure of Example 3 of the present application;

[0038] Figure 8 It is a cross-sectional structural schematic diagram of the embodiment 3 of the present application embodying the installation and matching of the rebound washer;

[0039] Fig. 9 yes Figure 8 A partial enlarged schematic diagram of part B;

[0040] Fig.10 yes Figure 8 A partial enlarged schematic diagram of part C in the middle.

[0041] In the figure, 1, pressing seat; 11, pressing cavity; 12, pressing groove; 121, first positioning ring groove; 122, second positioning ring groove; 13, positioning convex ring; 2, pressing rod; 21, pressing cover; 22, third positioning ring groove; 23, reinforcing convex ring; 3, elastic dust cap; 31, flange; 32, protruding portion; 33, bending portion; 331, annular boss; 332, limiting convex ring; 4, limiting sleeve; 41, limiting ring; 5, rebound washer; 51, rebound portion; 52, first positioning convex strip; 53, second positioning convex strip; 54, bending portion; 55, third positioning convex strip. DETAILED DESCRIPTION

[0042] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0043] Embodiment 1:

[0044] Reference Figure 1 , Figure 2 and Figure 3 A pressing structure for a button switch includes a pressing seat 1 and a pressing rod 2. A pressing cavity 11 for the pressing rod 2 to be placed is opened on the pressing seat 1. A pressing cover 21 is fixedly connected to the upper end of the pressing rod 2. The pressing rod 2 and the pressing cover 21 are integrally injection molded. A pressing groove 12 for the pressing cover 21 to be placed is opened on the inner edge of the upper opening of the pressing cavity 11 of the pressing seat 1.

[0045] Reference Figure 3 A reinforcing convex ring 23 is fixedly provided on the outer circumference of the pressing rod 2 around its own axis. The number of the reinforcing convex rings 23 is two, thereby strengthening the structural strength of the pressing rod 2 itself and extending the service life of the pressing rod 2.

[0046] Reference Figure 3 and Figure 4 The pressing seat 1 is provided with an elastic dust cap 3 located above the pressing cover 21, and the elastic dust cap 3 is made of silicone material, wherein the outer periphery of the elastic dust cap 3 is provided with a flange 31 bent toward one side and sleeved on the outer peripheral surface of the pressing cover 21, the flange 31 is also made of silicone material, and the elastic dust cap 3 and the flange 31 are integrally injection molded, and a protrusion 32 protruding away from the pressing cover 21 is provided at the connection between the flange 31 and the elastic dust cap 3; and a limiting sleeve 4 for fixing the flange 31 is provided on the outer periphery of the pressing seat 1.

[0047] When the pressing structure is pressed, the outer surface of the elastic dust cap 3 is pressed, thereby driving the pressing cover 21 to be pressed downward. Due to the setting of the protrusion 32, the possibility of the connection between the elastic dust cap 3 and the flange 31 being stretched and permanently deformed is reduced, thereby increasing the service life of the elastic dust cap 3.

[0048] Reference Figure 3 and Figure 4 The inner wall of the limiting sleeve 4 is fixedly connected to the outer circumference of the pressing seat 1 by threads; a bending portion 33 sleeved on the outer circumference of the pressing seat 1 is fixedly connected to the edge of the flange 31, the bending portion 33 is made of silicone material, and the bending portion 33 and the flange 31 are integrally injection molded, and a limiting ring 41 bent toward its own axis is provided on the limiting sleeve 4, and the limiting ring 41 faces the inner side surface of the bending portion 33 and is pressed against the side of the bending portion 33 away from the pressing seat 1; thereby, the assembly and fixation of the elastic dust cap 3 is achieved.

[0049] Reference Figure 4 The side of the pressing seat 1 facing the bending portion 33 is provided with a positioning convex ring 13, and the cross-sectional shape of the positioning convex ring 13 is a trapezoid; the side of the bending portion 33 facing the limiting ring 41 is fixedly provided with an annular boss 331, and the side of the annular boss 331 away from the bending portion 33 is fixedly provided with a limiting convex ring 332, and the annular boss 331 and the limiting convex ring 332 are both made of silicone;

[0050] When the elastic dust cap 3 is installed, the positioning protruding ring 13 on the pressing seat 1 presses against the bent portion 33 to deform it, and the annular boss 331 and the limiting protruding ring 332 press against the inner side surface of the limiting ring 41 .

[0051] The implementation principle of the embodiment of the present application is:

[0052] When the pressing structure is pressed, the outer surface of the elastic dust cap 3 is pressed, thereby driving the pressing cover 21 to be pressed downward. Due to the setting of the elastic dust cap 3, the possibility of external dust or other impurities entering the pressing cavity 11 through the space between the pressing cover 21 and the pressing groove 12 is reduced, thereby improving the dustproof performance of the pressing structure.

[0053] Embodiment 2:

[0054] Reference Figure 5 and Figure 6 The difference between the embodiment of the present application and embodiment 1 is that there is only one reinforcing convex ring 23 on the outer periphery of the pressing rod 2, thereby increasing the consumption of raw materials and saving processing costs while strengthening the structural strength of the pressing rod 2.

[0055] Embodiment 3:

[0056] Reference Figure 7 and Figure 8The difference between the embodiment of the present application and embodiment 1 is that a rebound washer 5 located inside the pressing groove 12 is provided on the pressing seat 1, the rebound washer 5 is made of rubber, and the rebound washer 5 is sleeved on the outer circumferential surface of the pressing rod 2; one side of the rebound washer 5 is tightly pressed against the bottom side of the pressing groove 12, and the other side of the rebound washer 5 is tightly pressed against the inner side surface of the pressing cover 21, and the outer circumferential surface of the rebound washer 5 protrudes in the direction away from the pressing cover 21; thereby reducing the entry of external dust or other impurities into the gap between the pressing rod 2 and the side wall of the pressing cavity 11, and further improving the dustproof performance of the pressing structure.

[0057] Reference Figure 8 A reciprocatingly folded rebound portion 51 is provided in the middle of the outer periphery of the rebound washer 5 to improve the rebound performance of the rebound washer 5; when the rebound force of the return spring inside the push button switch weakens due to long-term use, the rebound washer 5 can play the function of the return spring to enhance the performance of the push button switch.

[0058] Reference Figure 8 and Fig. 9 A first positioning ridge 52 is provided on the side surface of the rebound washer 5 facing the bottom side of the pressing groove 12, and a second positioning ridge 53 is provided on the side surface of the rebound washer 5 facing the side wall of the pressing groove 12. The first positioning ridge 52, the second positioning ridge 53 and the rebound washer 5 are integrally injection molded, and the three are made of the same material; and a first positioning ring groove 121 for inserting the first positioning ridge 52 and a second positioning ring groove 122 for inserting the second positioning ridge 53 are provided on the pressing groove 12, so as to realize the installation and fixation of the rebound washer 5 and the pressing seat 1.

[0059] Reference Figure 8 and Fig.10 A bending portion 54 is provided on the side edge of the rebound washer 5 facing the pressing cover 21 and is sleeved on the outer periphery of the pressing cover 21, wherein a third positioning convex strip 55 is fixedly provided on the bending portion 54, and the rebound washer 5, the bending portion 54 and the third positioning convex strip 55 are integrally injection molded, and a third positioning ring groove 22 is provided on the pressing rod 2 for the third positioning convex strip 55 to be inserted, so as to realize the assembly and fixation of the rebound washer 5 and the pressing rod 2.

[0060] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0061] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressing structure for a push button switch, comprising a pressing seat (1) and a pressing rod (2), wherein the pressing seat (1) is provided with a pressing cavity (11) for the pressing rod (2) to be placed therein, the upper end of the pressing rod (2) is provided with a pressing cover (21), and the pressing seat (1) is provided with a pressing recess (12) for the pressing cover (21) to be placed therein at the inner edge of the upper opening of the pressing cavity (11); It is characterized in that The pressing seat (1) is provided with an elastic dust cap (3) located above the pressing cover (21); the outer periphery of the elastic dust cap (3) is provided with a flange (31) bent toward one side and sleeved on the outer periphery of the pressing cover (21); and the outer periphery of the pressing seat (1) is provided with a limiting sleeve (4) for fixing the flange (31).

2. A pressing structure for a push button switch according to claim 1, characterized in that: A protrusion (32) protruding in a direction away from the pressing cover (21) is provided at the connection between the flange (31) and the elastic dust cap (3).

3. A pressing structure for a push button switch according to claim 1, characterized in that: A bending portion (33) sleeved on the outer periphery of the pressing seat (1) is provided on the edge of the flange (31), and a limiting ring (41) bent toward its own axis is provided on the limiting sleeve (4), and the limiting ring (41) faces the inner side surface of the bending portion (33) and is pressed against the side surface of the bending portion (33) away from the pressing seat (1).

4. A pressing structure for a push button switch according to claim 3, characterized in that: The side surface of the pressing seat (1) facing the bent portion (33) is provided with a positioning convex ring (13).

5. A pressing structure for a push button switch according to claim 3, characterized in that: The side of the bending portion (33) facing the limiting ring (41) is provided with an annular boss (331), and the side of the annular boss (331) away from the bending portion (33) is provided with a limiting convex ring (332).

6. A pressing structure for a push button switch according to claim 1, characterized in that: The pressing seat (1) is provided with a rebound washer (5) located inside the pressing recess (12), and the rebound washer (5) is sleeved on the outer peripheral surface of the pressing rod (2); One side of the rebound washer (5) is pressed against the bottom side of the pressing groove (12), and the other side of the rebound washer (5) is pressed against the inner side surface of the pressing cover (21), and the outer peripheral surface of the rebound washer (5) protrudes in a direction away from the pressing cover (21).

7. A pressing structure for a push button switch according to claim 6, characterized in that: A reciprocatingly folded rebound portion (51) is provided in the middle of the outer circumference of the rebound washer (5).

8. A pressing structure for a push button switch according to claim 6, characterized in that: A first positioning convex strip (52) is provided on the side surface of the rebound washer (5) facing the bottom side of the pressing recess (12), and a first positioning ring groove (121) is provided on the pressing recess (12) for the first positioning convex strip (52) to be inserted; A second positioning convex strip (53) is provided on the side surface of the rebound washer (5) facing the side wall of the pressing recess (12), and a second positioning ring groove (122) for the second positioning convex strip (53) to be inserted is provided on the pressing recess (12).

9. A pressing structure for a push button switch according to claim 6, characterized in that: The side edge of the rebound washer (5) facing the pressing cover (21) is provided with a bending portion (54) sleeved on the outer periphery of the pressing cover (21), the bending portion (54) is provided with a third positioning convex strip (55), and the pressing rod (2) is provided with a third positioning ring groove (22) for the third positioning convex strip (55) to be inserted.

10. The pressing structure for a push button switch according to claim 1, characterized in that: A reinforcing convex ring (23) is provided on the outer periphery of the pressing rod (2).

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