Button switch

Abstract

The utility model relates to a button switch, which comprises a cylindrical shell, an inner mounting bracket and a button, a sealing sleeve is arranged between the button and the inner wall of the cylindrical shell, the hollow cavity wall of the cylindrical shell is provided with an annular sealing connecting bulge, one end of the sealing sleeve is an outer connecting end connected to the button in a sealing manner, and the other end of the sealing sleeve is an inner mounting bracket. The other end of the sealing sleeve is an inner connecting end fixed to a sealing connecting protrusion of the cylindrical shell, an annular clamping piece is supported on the inner mounting support, the section of the clamping piece is in an L shape, the clamping piece comprises an annular axial clamping piece, a radial clamping cylinder ring extending in the axial direction is formed on the inner diameter side of the axial clamping piece, and the radial clamping cylinder ring is fixed to the outer diameter side of the axial clamping piece. The inner connecting end comprises a flat gasket part supported on the axial clamping piece and a sleeving part arranged on the radial clamping cylinder ring in a sleeving mode, the flat gasket part of the inner connecting end is pressed on the axial end face of the sealing connecting protrusion through the axial clamping piece, and the sleeving part of the inner connecting end is pressed on the inner ring hole wall of the sealing connecting protrusion through the radial clamping cylinder ring. The device has the advantages of convenient installation and reliable sealing.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, specifically push-button switches. Background Technology

[0002] Traditional push-button switches use a sealing sleeve at the button head for waterproofing, as disclosed in Chinese patent application No. 201621035294.2 entitled "Multifunctional Push-Button Switch". The inner end of the sealing sleeve (sealing ring 4 in the document) is fixedly sealed to the inner wall of the housing. This sealing relies on the annular stepped surface on the inner wall of the housing and an internal support (shield 5 in the document) for clamping and sealing. The outer end of the sealing sleeve is directly fitted onto the button (light-transmitting cover 3 in the document) for a fixed connection and seal. However, this method has the following problems: the inner end of the sealing sleeve relies on the internal mounting support for sealing. To ensure the reliability of the sealing sleeve, the mounting support must be a complete annular design, limiting the design modifications of the mounting support. Furthermore, the sealing sleeve mainly relies on the axial stepped surface of the inner wall of the housing for clamping and sealing, requiring a relatively wide axial surface to meet the sealing fit. This results in a significant variation in the housing thickness, meaning the wall thickness near the head needs to be greater, which is detrimental to cost control, especially for metal housings. In addition, the outer port of the sealing sleeve is directly fitted onto the button, which makes the assembly of the switch inconvenient and the sealing reliability of the sealing sleeve at the outer port position cannot be well guaranteed.

[0003] In addition, the above-mentioned switch has the following shortcomings in terms of assembly: The button head is clamped and fixed to the mounting panel using a nut. During installation, the entire product rotates along with the nut, making installation inconvenient. Furthermore, the flat end of the button switch makes additional stabilization difficult and can easily damage the switch during operation. Therefore, the product suffers from inconvenience and insecure installation, leading to problems such as the switch easily wobbling later on. Also, due to inadequate tightening, the panel seal at the switch mounting location is insufficient. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide a button switch that is easy to install and has a reliable seal, so as to ensure reliable installation of the inner end of the sealing sleeve without restricting the design of the internal support.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A push-button switch includes a cylindrical housing, an inner mounting bracket, and a button. A sealing sleeve is provided between the button and the inner wall of the cylindrical housing. The hollow cavity wall of the cylindrical housing has an annular sealing connection protrusion. One end of the sealing sleeve is an outer connection end that is sealed to the button, and the other end of the sealing sleeve is an inner connection end that is fixed to the sealing connection protrusion of the cylindrical housing. The inner mounting bracket supports an annular clamping member with an L-shaped cross-section. The clamping member includes an annular axial clamping piece, and an axially extending radial clamping ring is formed on the inner diameter side of the axial clamping piece. The inner connection end includes a flat pad supported on the axial clamping piece and a sleeve portion fitted on the radial clamping ring. The flat pad of the inner connection end is pressed against the axial end face of the sealing connection protrusion by the axial clamping piece, and the sleeve portion of the inner connection end is pressed against the inner annular hole wall of the sealing connection protrusion by the radial clamping ring.

[0007] Preferably, the button includes a button inner seat mounted on an inner mounting bracket and a button cap mounted on the button inner seat. The top of the button inner seat has a protruding connector tube with an annular supporting top surface and a snap-fit ​​hole. The button cap includes a pressing end cap with a protruding insertion post and a locking pin. The outer connecting end includes an annular pad placed on the supporting top surface of the connector tube. The insertion post of the button cap is inserted into the connector tube, and the locking pin on the insertion post is engaged in the snap-fit ​​hole. The pressing end cap of the button cap presses the annular pad tightly against the supporting top surface of the connector tube.

[0008] Preferably, the annular pad is elastically fitted onto the plug post.

[0009] Preferably, the external connection end further includes a cap ring connected to the outer circumference of the annular pad and fitted onto the end of the connector tube.

[0010] Preferably, the inner hole of the connector tube is provided with two opposing positioning parts, each positioning part having a lateral positioning plane and an axial limiting end face. The connector post includes a tubular root and two opposing inserts. The clamping foot is formed on the inserts, and the gap between the two inserts forms an insertion space. Correspondingly, the tubular root has a positioning end face corresponding to the insertion space. The positioning part is inserted into the insertion space, the lateral positioning plane is adapted to the side of the two inserts for positioning, and the axial limiting end face is limited and matched with the positioning end face.

[0011] Preferably, the end of the cylindrical shell has a radially outwardly turned flange, and the cylindrical shell has an external thread extending towards the flange. A fastening nut is screwed onto the external thread of the cylindrical shell. A locking square washer is fitted onto the cylindrical shell, and the locking square washer is located between the flange and the fastening nut. The locking square washer has a locking mounting hole with a locking plane, and the locking mounting hole has at least two oppositely arranged locking planes. The four corners of the locking square washer are upturned with engagement tips. The external thread of the cylindrical shell has an axially extending flat surface, and the locking plane and the flat surface are correspondingly engaged to achieve circumferential locking of the locking square washer onto the cylindrical shell.

[0012] Preferably, the cylindrical shell has a smooth surface between the external thread and the flange, and a sealing ring is fitted on the smooth surface.

[0013] By adopting the above technical solution, a clamping component independent of the inner mounting bracket is used to engage with the sealing connection protrusion of the cylindrical shell to clamp and fix the sealing sleeve. This solves the problem of directly molding the sealing sleeve installation structure on the inner mounting bracket, which restricts the structure of the inner mounting bracket. The independent clamping component allows for more flexible structural design, and its L-shaped design provides both axial and radial compression and fixation of the sealing sleeve, thereby improving the reliability of the sealing sleeve installation and ensuring a reliable seal. Since the end of the sealing sleeve is radially limited by the clamping component, assembly is also more convenient. In addition, this design utilizes the annular hole wall of the sealing connection protrusion to compress and seal the sealing sleeve, which reduces the dimensions required for axial compression and fixation of the sealing sleeve, allowing for better optimization of the cylindrical shell wall thickness and reducing costs. In the button assembly structure design, after the button cap is snapped onto the inner seat of the button for assembly, the sealing sleeve is compressed and fixed, which has the advantages of convenient assembly and reliable sealing sleeve fixation, while also forming a reliable seal. Another objective of this invention is to facilitate installation by using a locking square washer. The locking square washer is circumferentially locked to the cylindrical housing to prevent the locking square washer from rotating when the nut is tightened. As the fastening nut is tightened, the biting tip of the locking square washer engages with the equipment panel, thereby locking the switch to the equipment panel. This allows for convenient and reliable tightening of the fastening nut.

[0014] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a perspective view of the push button switch of this utility model;

[0016] Figure 2 This is an exploded view of the push-button switch of this utility model;

[0017] Figure 3 This is a schematic diagram of the push button switch of this utility model;

[0018] Figure 4 This is a diagram showing the button cap of the push-button switch of this utility model removed.

[0019] Figure 5 This is a schematic diagram of the keycap structure of this utility model. Detailed Implementation

[0020] See appendix Figures 1-5 This utility model discloses a push-button switch, including a cylindrical housing 1, an inner mounting bracket 2, and a button 3. The internal switching components of the push-button switch are conventional technologies, and those skilled in the art can understand their corresponding structures, so they will not be described in detail. A sealing sleeve 4 is provided between the button 3 and the inner wall of the cylindrical housing 1. The hollow cavity wall of the cylindrical housing 1 has an annular sealing connection protrusion 11. The sealing sleeve 4 includes a central body 40, an outer connecting end 41, and an inner connecting end 42. The outer connecting end 41 is sealed to the button 3, and the inner connecting end 42 is fixed to the sealing connection protrusion 11 of the cylindrical housing 1. The inner mounting bracket... The upper part 2 is supported by an annular clamping member 5. The clamping member 5 has an L-shaped cross-section and includes an annular axial clamping piece 51. The inner diameter side of the axial clamping piece 51 is formed with an axially extending radial clamping ring 52. The inner connecting end 42 includes a flat pad 421 supported on the axial clamping piece 51 and a sleeve 422 fitted on the radial clamping ring 52. The flat pad 421 of the inner connecting end 42 is pressed against the axial end face of the sealing connection protrusion 11 by the axial clamping piece 51, and the sleeve 422 of the inner connecting end 42 is pressed against the inner annular hole wall of the sealing connection protrusion 11 by the radial clamping ring 52. By using a clamping member 5 independent of the inner mounting bracket 2 to cooperate with the sealing connection protrusion 11 of the cylindrical shell 1, the sealing sleeve 4 can be clamped and fixed, thereby solving the problem of directly forming the sealing sleeve installation structure on the inner mounting bracket 2, which leads to the limitation of the inner mounting bracket structure; and the independent clamping member 5 is more conducive to the flexible setting of the structure. Meanwhile, the clamping member 5 adopts an L-shaped design to clamp and fix the sealing sleeve 4 in both the axial and radial directions, thereby improving the reliability of the sealing sleeve installation and ensuring reliable sealing. Since the end of the sealing sleeve is limited in the radial direction by the clamping member 5, the assembly is also more convenient. In addition, under this design, the sealing sleeve 4 is clamped and sealed by the annular hole wall of the sealing connection protrusion 11, which reduces the size required for axial clamping and fixing of the sealing sleeve 4, so that the wall thickness of the cylindrical shell 1 can be better optimized and the cost can be reduced.

[0021] To further achieve a more reliable seal at the outer end of the sealing sleeve, the button 3 includes a button inner seat 31 mounted on the inner mounting bracket 2, and a button cap 32 mounted on the button inner seat 31. The top of the button inner seat 31 has a protruding connector tube 311, which has an annular supporting top surface 3111 and a snap-fit ​​hole 3112. The button cap 32 includes a pressing end cover 321, on which a protruding insertion post 322 is provided. The plug-in post 322 is provided with a locking foot 3221. The external connecting end 41 includes an annular gasket 411, which is placed on the supporting top surface 3111 of the connector tube 311. The plug-in post 322 of the button cap 32 is inserted into the connector tube 311, and the locking foot 3221 on the plug-in post 322 is engaged in the locking hole 3112. The pressing end cap 321 of the button cap 32 presses the annular gasket 411 tightly against the supporting top surface 3111 of the connector tube 311. During installation, the inner button seat 31 can be inserted from the bottom end of the cylindrical shell 1 along with the inner mounting bracket 2. The outer end of the sealing sleeve 4 can be fitted onto the supporting top surface of the inner button seat 31. Finally, the button cap 32 is snapped onto the inner button seat 31, simultaneously pressing and fixing the annular gasket of the sealing sleeve 4 to achieve a seal. This not only facilitates assembly operations but also achieves a more reliable sealing fixation. The annular gasket is elastically fitted onto the plug-in post to achieve elastic fitting and form a better sealing effect. The external connection end 41 also includes a cap ring 412 that is connected to the outer circumference of the annular pad 411 and fitted onto the end of the connector tube 311. This facilitates the positioning and installation of the external connection end and the connector tube, and makes assembly easier.

[0022] In this specific embodiment, the inner hole of the connector tube 311 is provided with two opposing positioning portions 3113. Each positioning portion 3113 has a lateral positioning plane 31131 and an axial limiting end face 31132. The insertion post 322 includes a tubular root portion 3222 and two opposing inserts 3223. The retaining foot 3221 is formed on the inserts 3223. The gap between the two inserts 3223 forms an insertion space 3220. Correspondingly, the tubular root portion 3222 has a positioning end face 32221 corresponding to the insertion space 3220. The positioning portion 3113 is inserted into the insertion space 3220, and the lateral positioning plane 31131 is adapted to the sides of the two inserts 3223 for positioning. The axial limiting end face 31132 is limited and fitted with the positioning end face 32221. The button cap and connector tube achieve a compact and reliable fit.

[0023] like Figures 1-3As shown, in another embodiment of this utility model, to solve the problem of inconvenient installation of push-button switches, the end of the cylindrical housing 1 has a radially outwardly turned flange 12, the cylindrical housing 1 is provided with an external thread 13 extending to the flange 12, a fastening nut 6 is screwed onto the external thread 13 of the cylindrical housing 1, a locking square washer 7 is fitted on the cylindrical housing 1, the locking square washer 7 is located between the flange 12 and the fastening nut 6, the locking square washer 7 has a locking assembly hole 71 with a locking plane 711, the locking assembly hole 71 has at least two oppositely arranged locking planes 711, the four corners of the locking square washer 7 have upwardly curved engagement tips 72, the external thread 13 of the cylindrical housing 1 has an axially extending flat surface 131, the locking plane 711 and the flat surface 131 are correspondingly engaged to realize that the locking square washer 7 is circumferentially locked on the cylindrical housing 1. The cylindrical housing 1 has a smooth surface 14 between its external thread 13 and flange 12, and a sealing ring 8 is fitted on the smooth surface 14. A locking square washer is used for easy installation. The locking square washer is circumferentially locked to the cylindrical housing, preventing rotation of the locking square washer when the nut is tightened. As the nut is tightened, the engaging tip of the locking square washer engages with the equipment panel, thereby locking the switch to the equipment panel, enabling convenient and reliable tightening of the nut.

Claims

1. A push-button switch, comprising a cylindrical housing, an inner mounting bracket, and a button, wherein a sealing sleeve is provided between the button and the inner wall of the cylindrical housing, the hollow cavity wall of the cylindrical housing has an annular sealing connection protrusion, one end of the sealing sleeve is an external connection end sealed to the button, and the other end of the sealing sleeve is an internal connection end fixed to the sealing connection protrusion of the cylindrical housing, characterized in that: The inner mounting bracket is supported by an annular clamping member with an L-shaped cross-section. The clamping member includes an annular axial clamping plate, and an axially extending radial clamping sleeve is formed on the inner diameter side of the axial clamping plate. The inner connecting end includes a flat pad supported on the axial clamping plate and a sleeve portion fitted on the radial clamping sleeve. The flat pad of the inner connecting end is pressed against the axial end face of the sealing connection protrusion by the axial clamping plate, and the sleeve portion of the inner connecting end is pressed against the inner annular hole wall of the sealing connection protrusion by the radial clamping sleeve.

2. The push-button switch according to claim 1, characterized in that: The button includes a button seat mounted on an inner mounting bracket and a button cap mounted on the button seat. The top of the button seat has a protruding connector tube with an annular supporting top surface and a snap-fit ​​hole. The button cap includes a pressing end cap with a protruding insertion post and a snap-fit ​​foot. The outer connecting end includes an annular pad placed on the supporting top surface of the connector tube. The insertion post of the button cap is inserted into the connector tube, and the snap-fit ​​foot on the insertion post snaps into the snap-fit ​​hole. The pressing end cap of the button cap presses the annular pad tightly against the supporting top surface of the connector tube.

3. The push-button switch according to claim 2, characterized in that: The annular pad is elastically fitted onto the plug post.

4. The push-button switch according to claim 2, characterized in that: The external connection end also includes a cap ring connected to the outer circumference of the annular pad and fitted onto the end of the connector tube.

5. The push-button switch according to claim 2, characterized in that: The inner hole of the connector tube is provided with two opposing positioning parts. The positioning part has a lateral positioning plane and an axial limiting end face. The insertion post includes a tubular root and two opposing inserts. The clamping foot is formed on the inserts. The gap between the two inserts forms an insertion space. The corresponding tubular root has a positioning end face corresponding to the insertion space. The positioning part is inserted into the insertion space. The lateral positioning plane is adapted to the side of the two inserts for positioning. The axial limiting end face is limited and matched with the positioning end face.

6. The push-button switch according to claim 1, characterized in that: The cylindrical shell has a radially outwardly turned flange at its end. An external thread extending towards the flange is provided on the cylindrical shell, and a fastening nut is screwed onto the external thread. A locking square washer is fitted onto the cylindrical shell, located between the flange and the fastening nut. The locking square washer has a locking mounting hole with a locking plane, and the locking mounting hole has at least two opposing locking planes. The four corners of the locking square washer are upturned with engaging tips. The external thread of the cylindrical shell has an axially extending flat surface, and the locking plane and the flat surface correspond and mate, thus circumferentially locking the locking square washer onto the cylindrical shell.

7. The push-button switch according to claim 6, characterized in that: The cylindrical shell has a smooth surface between its external thread and flange, and a sealing ring is fitted on the smooth surface.

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