Waterproof and dustproof button switch
By using a hollow tubular shell and a circular waterproof rubber sleeve in the button switch, the problem of water and dust invasion in the gap between the button and the shell in the prior art is solved, and better waterproof, dustproof effect and service performance are achieved.
Patent Information
- Application Number
- CN202421128852.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Existing push button switches are prone to invasion of water and dust in the gap between the button and the housing, resulting in short circuits and poor function.
A waterproof and dust-proof button switch is designed, using a hollow tubular shell and a circular-shaped waterproof rubber sleeve. The waterproof rubber sleeve is placed outside the key cap. The lower edge of the key cap presses the inner edge of the waterproof rubber sleeve on the limit baffle. The compression ring presses the outer edge of the waterproof rubber sleeve on the outer shell to ensure sealing.
It effectively prevents water or dust from invading from the gap between the button and the shell, enhances the waterproof and dustproof performance of the switch, and avoids the problem of wear of the rubber sleeve after long-term use.
Smart Images
Figure CN222775182U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switches, in particular to a waterproof and dustproof push button switch. Background Art
[0002] A push button switch is also called a key switch. When in use, you only need to press the button to turn it on or off. It is widely used in electronic devices. In the existing push button switch, there will inevitably be a gap between the button and the shell, which is easy to cause water or dust to enter the switch, resulting in problems such as short circuit and malfunction of the switch. In order to solve the waterproof and dustproof problem, the method adopted in the prior art is to set a rubber sleeve on the upper end of the shell to cover the entire button. When pressing the button, the finger touches the rubber sleeve. After long-term use, the finger-touched part of the rubber sleeve will be worn, thereby affecting the waterproof and dustproof performance. Utility Model Content
[0003] To solve this problem, the utility model provides a push button switch with good waterproof and dustproof performance.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The utility model provides a waterproof and dustproof push button switch, comprising a hollow tubular shell, a button, a moving contact unit, a first spring and a base are arranged in the shell, and a static contact is arranged on the base;
[0006] The button comprises a hollow guide column and an upper end plate integrally fixed to the upper end of the guide column; a limit baffle is arranged at the lower part of the outer edge of the upper end plate; an upward step surface is arranged on the inner wall of the shell; a return spring is sleeved on the outer side of the guide column, and the return spring is located between the limit baffle and the step surface;
[0007] A button cap is snap-connected to the top of the upper end plate; a circular waterproof rubber sleeve is arranged outside the button cap, and the lower edge of the button cap presses the inner edge of the waterproof rubber sleeve onto the limit baffle; a clamping ring is screwed on the upper end of the outer shell, and the clamping ring presses the outer edge of the waterproof rubber sleeve onto the outer shell, and the top of the button cap exposed in the middle of the clamping ring forms a switch pressing portion.
[0008] In some embodiments, an annular clamping protrusion is provided on the outer peripheral wall of the upper end plate above the limit baffle, and the button cap is clamped with the upper end plate through the annular clamping protrusion; the waterproof rubber sleeve is an inner and outer double-layer structure made of rubber or silicone material, and the bottom edge of the inner layer of the waterproof rubber sleeve extends inward to form a pressing edge, and the lower end edge of the button cap presses the pressing edge against the limit baffle.
[0009] In some embodiments, an upwardly extending anti-slip flange is provided on the inner edge of the pressing edge, and the anti-slip flange is limited in an annular space surrounded by the lower edge of the button cap, the annular clamping protrusion and the limiting baffle.
[0010] In some embodiments, a sealing groove opening upward is provided at the upper end of the outer shell, the lower end periphery of the outer layer of the waterproof rubber sleeve is embedded in the sealing groove, an annular pressure edge is provided on the outer peripheral surface of the outer layer of the waterproof rubber sleeve, and the clamping ring presses the annular pressure edge against the upper end surface of the outer shell.
[0011] In some embodiments, a mounting post extending upward into the guide post is disposed at the center of the contact frame, and a lamp bead is mounted on the upper end of the mounting post.
[0012] In some embodiments, the button and the key cap are both made of light-transmitting materials, and a light-shielding sheet with a hollow area is arranged between the key cap and the upper end plate.
[0013] In some embodiments, a guide strip arranged in the up-down direction is provided on the outer wall of the guide column, and a guide groove is correspondingly provided on the inner wall of the shell, and the guide strip cooperates with the guide groove to provide guidance for the up-down movement of the button.
[0014] In some embodiments, the moving contact unit includes a contact frame movable up and down, a moving contact mounted on the contact frame, and a second spring mounted on the contact frame to provide downward elastic force for the moving contact.
[0015] In some embodiments, the inner bottom of the shell is provided with a downward annular stop and an inwardly protruding card platform, the base is installed into the inner bottom of the shell and abuts against the annular stop, and the side wall of the base is provided with a card slot that is engaged with the card platform.
[0016] The waterproof and dustproof button switch structure provided by the utility model is optimized in design. Specifically, a waterproof rubber sleeve is arranged around the button to prevent water and dust, which can effectively prevent water or dust from invading from the gap between the button and the shell, thereby achieving the effect of waterproofing and dustproofing; further, the waterproof rubber sleeve is in a circular ring structure and is sleeved outside the button cap. The lower edge of the button cap presses the inner edge of the waterproof rubber sleeve against the limit baffle, and the clamping ring presses the outer edge of the waterproof rubber sleeve against the shell. The top of the button cap exposed in the middle of the clamping ring forms a switch pressing part. During operation, the finger presses the button downward from the switch pressing part, thereby avoiding damage to the waterproof rubber sleeve when the button is touched, thereby ensuring the durability of the waterproof rubber sleeve sealing and enhancing the switch performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of the structure of a push button switch provided in an embodiment of the utility model;
[0019] Figure 2 for Figure 1 A cross-sectional view of a push button switch provided in;
[0020] Figure 3 for Figure 1 Exploded diagram of the push button switch provided in;
[0021] Figure 4 This is a schematic diagram of the structure of a button of a push button switch in an embodiment of the utility model;
[0022] Figure 5 This is a schematic diagram of the structure of the waterproof rubber sleeve in the embodiment of the utility model;
[0023] Figure 6 It is a partial structural schematic diagram of a push button switch in an embodiment of the utility model. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0026] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0027] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0028] The present utility model embodiment provides a waterproof and dustproof push button switch 100. Figure 1-Figure 5As shown, the waterproof and dustproof push button switch 100 includes a hollow tubular housing 1, on which a button 2, a moving contact unit 7, a first spring 71 and a base 9 are arranged, and the moving contact unit 7 includes a contact frame 73 that can move up and down, a moving contact 75 mounted on the contact frame 73, and a second spring 74 mounted on the contact frame 73 to provide a downward elastic force for the moving contact 75; a stationary contact 91 is mounted on the base 9, and the moving contact 75 contacts / separates with the stationary contact 91 after the button 2 is pressed, and the moving contact 75 separates / contacts with the stationary contact 91 after the button 2 is reset upward; the button 2 includes a hollow guide column 22 and an upper end plate 21 integrally fixed to the upper end of the guide column 22; on the upper end plate 21 A limit baffle 211 is arranged at the lower part of the outer edge; an upward step surface 11 is arranged on the inner wall of the outer shell 1; a return spring 221 is sleeved on the outer side of the guide column 22, and the return spring 221 is located between the limit baffle 211 and the step surface 11; a button cap 3 is snap-connected with the top of the upper end plate 21; a circular waterproof rubber sleeve 4 is arranged on the outer sleeve of the button cap 3, and the lower edge of the button cap 3 presses the inner edge of the waterproof rubber sleeve 4 onto the limit baffle 211; a clamping ring 5 is screwed on the upper end of the outer shell 1, and the clamping ring 5 presses the outer edge of the waterproof rubber sleeve 4 onto the outer shell 1, and the top of the button cap 3 exposed in the middle of the clamping ring 5 forms a switch pressing part.
[0029] The waterproof and dustproof push button switch 100 provided by the utility model is provided with a waterproof rubber sleeve 4 around the button 2 for waterproof and dustproof, which can effectively prevent water or dust from invading from the gap between the button 2 and the shell 1, and has the effect of waterproof and dustproof; further, the waterproof rubber sleeve 4 is in a circular ring structure, which is sleeved on the outer periphery of the button cap 3, and the lower edge of the button cap 3 presses the inner edge of the waterproof rubber sleeve 4 on the limit baffle 211, and the clamping ring presses the outer edge of the waterproof rubber sleeve 4 on the shell 1, and the top of the button cap 3 exposed in the middle of the clamping ring 5 forms a switch pressing part. During operation, the finger presses the button 2 downward from the switch pressing part, thereby avoiding damage to the waterproof rubber sleeve 4 when touching the button 2, thereby ensuring the durability of the waterproof rubber sleeve sealing and enhancing the switch performance.
[0030] In order to make the waterproof and dustproof push button switch 100 have a self-locking function for the button 2, a self-locking structure 8 can be set in the housing 1 between the button 2 and the moving contact unit 7. If the self-locking function is not required, the self-locking structure 8 can be omitted. The self-locking structure is a common structure in push button switches and is not described in detail in this embodiment.
[0031] Combination Figure 2 , Figure 4 and Figure 5As shown, an annular clamping protrusion 212 is provided on the outer peripheral wall of the upper end plate 21 above the limiting baffle 211, and the key cap 3 is clamped with the upper end plate 21 through the annular clamping protrusion 212; the waterproof rubber sleeve 4 is an inner and outer double-layer structure made of rubber or silicone material, and the bottom edge of the inner layer of the waterproof rubber sleeve 4 extends inward to form a pressing edge 40, and the lower end edge of the key cap 3 presses the pressing edge 40 on the limiting baffle 211, thereby pressing the inner edge of the waterproof rubber sleeve 4 on the upper end plate 21. Furthermore, an upwardly extending anti-slip flange 41 is provided on the inner edge of the pressing edge, and the anti-slip flange 41 is limited in the annular space surrounded by the lower edge of the key cap 3, the annular clamping protrusion 212 and the limiting baffle 211, so that the waterproof rubber sleeve 4 can be more effectively prevented from falling off.
[0032] Furthermore, in order to compress the waterproof rubber sleeve 4 and prevent it from falling off, a sealing groove 12 opening upward is provided at the upper end of the outer shell 1, and the lower end periphery of the outer layer of the waterproof rubber sleeve 4 is embedded in the sealing groove 12. An annular pressure edge 42 is provided on the outer peripheral surface of the outer layer of the waterproof rubber sleeve 4, and the clamping ring 5 presses the annular pressure edge 42 against the upper end surface of the outer shell 1.
[0033] The center of the contact frame 73 is provided with a mounting column 76 extending upward into the guide column 22, and the upper end of the mounting column 76 is provided with a lamp bead 10, and the light emitted by the lamp bead 10 is scattered outward through the button 2 and the key cap 3 to achieve a lighting indication effect.
[0034] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the button 2 and the key cap 3 are both made of light-transmitting materials, and a shading sheet 6 with a hollow area is arranged between the key cap 3 and the upper end plate 21. The hollow area of the shading sheet 6 can be a warning sign or trademark logo or symbol logo pre-made according to customer needs, and the light emitted by the lamp bead 10 can pass through the hollow area to present a corresponding pattern.
[0035] In some embodiments, Figure 2 and Figure 4 As shown, a guide strip 221 is provided on the outer wall of the guide column 22 along the up-down direction, and a guide groove is correspondingly provided on the inner wall of the shell 1. The guide strip 221 and the guide groove cooperate to guide the button 2 to move in the up-down direction, thereby preventing the button 2 from rotating and misaligning during pressing.
[0036] In order to facilitate the assembly of the base 9 and the shell 1, in this embodiment, a downward annular baffle 13 and an inwardly protruding card platform are provided at the bottom of the shell 1. The base 9 is inserted into the shell 1 through the lower port of the shell 1 and abuts against the annular baffle 13. A card groove is provided on the side wall of the base 9 to be connected with the card platform.
[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A waterproof and dustproof push button switch, comprising a hollow tubular housing, wherein a button, a moving contact unit, a first spring and a base are arranged in the housing, and a stationary contact is arranged on the base; The button comprises a hollow guide column and an upper end plate integrally fixed to the upper end of the guide column; a limit baffle is arranged at the lower part of the outer edge of the upper end plate; an upward step surface is arranged on the inner wall of the shell; a return spring is sleeved on the outer side of the guide column, and the return spring is located between the limit baffle and the step surface; It is characterized in that A button cap is snap-connected to the top of the upper end plate; a circular waterproof rubber sleeve is arranged outside the button cap, and the lower edge of the button cap presses the inner edge of the waterproof rubber sleeve onto the limit baffle; a clamping ring is screwed on the upper end of the outer shell, and the clamping ring presses the outer edge of the waterproof rubber sleeve onto the outer shell, and the top of the button cap exposed in the middle of the clamping ring forms a switch pressing portion.
2. The waterproof and dustproof push button switch according to claim 1, characterized in that: An annular clamping protrusion is arranged on the outer peripheral wall of the upper end plate above the limit baffle, and the button cap is clamped with the upper end plate through the annular clamping protrusion; the waterproof rubber sleeve is an inner and outer double-layer structure made of rubber or silicone material, and the bottom edge of the inner layer of the waterproof rubber sleeve extends inward to form a pressing edge, and the lower end edge of the button cap presses the pressing edge tightly against the limit baffle.
3. The waterproof and dustproof push button switch according to claim 2, characterized in that: An upwardly extending anti-dropping flange is arranged on the inner edge of the pressing edge, and the anti-dropping flange is limited in an annular space surrounded by the lower edge of the key cap, the annular clamping protrusion and the limiting baffle.
4. The waterproof and dustproof push button switch according to claim 2, characterized in that: A sealing groove opening upward is provided at the upper end of the outer shell, the peripheral edge of the lower end of the outer layer of the waterproof rubber sleeve is embedded in the sealing groove, and an annular pressure edge is provided on the outer peripheral surface of the outer layer of the waterproof rubber sleeve, and the clamping ring presses the annular pressure edge against the upper end surface of the outer shell.
5. The waterproof and dustproof push button switch according to claim 1, characterized in that: The moving contact unit includes a contact frame that can move up and down, a moving contact mounted on the contact frame, and a second spring mounted on the contact frame to provide downward elastic force for the moving contact; a mounting column extending upward into the guide column is arranged at the center of the contact frame, and a lamp bead is arranged on the upper end of the mounting column.
6. The waterproof and dustproof push button switch according to claim 5, characterized in that: The button and the key cap are both made of light-transmitting materials, and a light-shielding sheet with a hollow area is arranged between the key cap and the upper end plate.
7. The waterproof and dustproof push button switch according to claim 1, characterized in that: A guide strip arranged in the up-down direction is arranged on the outer wall of the guide column, and a guide groove is correspondingly arranged on the inner wall of the shell. The guide strip cooperates with the guide groove to provide guidance for the up-down movement of the button.
8. The waterproof and dustproof push button switch according to claim 1, characterized in that: The inner bottom of the shell is provided with a downward annular stopper and an inwardly protruding clamping platform, the base is installed in the inner bottom of the shell and abuts against the annular stopper, and the side wall of the base is provided with a clamping groove clamped with the clamping platform.