Flat push plate press type travel switch
By designing a flat push-plate push-type limit switch and adopting a series structure of combination button, conductor and spring, the problem of insufficient reliability of traditional miniaturized limit switches in confined spaces is solved, and high reliability circuit switching and environmental adaptability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- G & A TECH
- Filing Date
- 2025-08-08
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional miniaturized limit switches cannot reasonably set up highly reliable contact forms in confined spaces, resulting in insufficient reliability of circuit opening and closing and circuit switching.
A flat push-plate push-type limit switch was designed, which adopts a series structure of combination button, conductor and spring. The circuit switching is realized by pressing the conductor and the axial movement of the spring. It is protected by sliding seal connection to meet the requirements of harsh environment.
It achieves highly reliable circuit switching in confined spaces, possesses excellent environmental performance and circuit stability, and meets the requirements of miniaturization and flattening design, adapting to various installation environments.
Smart Images
Figure CN224595427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit on / off switching technology, and in particular to a flat push plate push-type limit switch. Background Technology
[0002] In recent years, with the rapid development of limit switch technology and the requirement for overall miniaturization, the mounting positions of components providing circuit switching signals for miniaturized limit switches have also been adjusted. Some miniaturized limit switches require components to be mounted on the surface instead of inside the overall structure, and miniaturization and flattening of components have become increasingly demanding. However, in the pursuit of miniaturized limit switches, traditional solutions cannot reasonably set up highly reliable contact forms within a limited space. This results in traditional solutions failing to guarantee stable and reliable contact opening and closing, and thus the reliability of circuit switching and connection. Utility Model Content
[0003] The purpose of this utility model is to solve at least one technical problem in the background art and to provide a flat push plate push-type limit switch.
[0004] To achieve the above objectives, this utility model provides a flat push-plate press-type limit switch, comprising: The outer casing has a mounting cavity; A base is disposed at one end of the mounting cavity, and a through hole is provided in its center; A combination button is provided in the mounting cavity, with one end extending out of the housing through the through hole and slidingly sealingly connected to the inner wall of the through hole; The combination button is located on the outer wall of the other end of the mounting cavity, where conductive elements are arranged at intervals and in an alternating manner; A spring-loaded structure is provided in the mounting cavity and has spring pieces that are respectively connected to each conductor. When the combination button is pressed, the combination button drives the conductor to move axially. Each conductor is connected to each spring. When the force of pressing the combination button is released, the combination button is reset by the spring, and each conductor is disconnected from each spring.
[0005] According to one aspect of the present invention, it further includes: a push plate, wherein the push plate is rotatably connected to two mounting ears of the base via a pivot pin, and the push plate is provided with a boss that can abut against one end of the combination button.
[0006] According to one aspect of the present invention, the combination button includes: a pressing shaft, a first limiting plate, a spring, a second limiting plate, an insulating pad, two conductive bodies, an insulator, and a retaining ring; The pressing shaft is integrally arranged in the mounting cavity, with one end extending out of the outer shell through the through hole; The first limiting plate is fixedly sleeved on the pressing shaft, and the second limiting plate is movably sleeved on the pressing shaft. The first limiting plate and the second limiting plate are arranged at intervals between each other. The spring is disposed between the first limiting plate and the second limiting plate; The insulating pad is fitted onto the pressing shaft and is located on the side of the second limiting plate away from the spring; Two conductors are spaced apart and staggered on the pressing shaft, located on the side of the insulating pad away from the second limiting plate; The insulator is sleeved on the pressing shaft and is located on the side of the conductor near the tail of the pressing shaft; The retaining ring is located at the tail end of the pressing shaft.
[0007] According to one aspect of the present invention, the spring contact structure includes: a spring seat, two spring plates, and a spring seat cover; The spring seat is fixedly supported in the mounting cavity, and its middle part is provided with a sliding groove that is slidably connected to the pressing shaft. The spring seat is also provided with a first mounting groove and a second mounting groove, which are offset from each other. Both the first mounting groove and the second mounting groove are provided with openings that communicate with the sliding groove; One end of each of the two springs is supported in the first mounting groove and the second mounting groove, and the arc-shaped bend at one end of each of the two springs is movably connected to the opening, and a portion of the arc-shaped bend extends into the slide groove through the opening.
[0008] According to one aspect of the present invention, the inner wall of the mounting cavity is provided with support bosses on both sides, and the spring seat cover includes a stepped portion and a tail portion, wherein the stepped portion is engaged with the support bosses. The tail end of the spring seat cover is provided with two sets of sleeve assemblies spaced apart. The other ends of the two springs pass through the gap between the spring seat and the spring seat cover and extend into the corresponding sleeve assemblies respectively.
[0009] According to one aspect of the present invention, the sleeve assembly includes a heat shrink tubing and a crimped sleeve fitted over the heat shrink tubing.
[0010] According to one aspect of the present invention, it also includes: a cable clamp, a tail cover, and a connector; The cable clamp is disposed at the other end of the mounting cavity and is used to constrain and fix the wire introduced from the connector; The tail cover is installed at the tail of the housing and is connected to the cable clamp; The connector is located inside the tail cover, and its lead wire extends through the cable clamp and into the sleeve assembly to connect to the other end of the spring.
[0011] According to one aspect of the present invention, it further includes: two mounting plates, the two mounting plates being symmetrically arranged on both sides of the outer casing, each mounting plate being provided with mounting holes.
[0012] According to one embodiment of this utility model, a flat push-plate press-type limit switch includes: a housing with a mounting cavity; a base disposed at one end of the mounting cavity, having a through hole at its center; a combination button disposed in the mounting cavity, one end of which extends out of the housing through the through hole and is slidably sealed to the inner wall of the through hole; conductors are arranged alternately and at intervals on the outer wall of the other end of the combination button in the mounting cavity; a contact spring structure disposed in the mounting cavity, having springs respectively connected to each conductor; when the combination button is pressed, the combination button drives the conductors to move axially, and each conductor connects to each spring; when the force of pressing the combination button is released, the combination button is reset by the spring, and each conductor disconnects from each spring. This configuration allows the axial movement of the conductors on the combination button, driven by pressing it, to contact or disconnect with the corresponding springs, thereby achieving circuit switching. Furthermore, the sliding seal connection between the combination button and the through hole protects the switch from environmental requirements such as rain and dust.
[0013] According to one embodiment of this utility model, the combination button includes: a pressing shaft, a first limiting plate, a spring, a second limiting plate, an insulating pad, two conductors, an insulator, and a retaining ring; the pressing shaft is integrally arranged in the mounting cavity, with one end extending out of the outer shell through a through hole; the first limiting plate is fixedly sleeved on the pressing shaft, and the second limiting plate is movably sleeved on the pressing shaft, with the first and second limiting plates spaced apart from each other; the second limiting plate abuts against the side wall of the touch spring structure; the spring is disposed between the first and second limiting plates; the insulating pad is sleeved on the pressing shaft, located on the side of the second limiting plate away from the spring; the two conductors are spaced apart and staggered on the pressing shaft, located on the side of the insulating pad away from the second limiting plate; the insulator is sleeved on the pressing shaft, located on the side of the conductor near the tail of the pressing shaft; the retaining ring is disposed at the tail end of the pressing shaft. This design allows the pressing shaft to move axially when pushed by the push plate. The pressing shaft, along with its first limiting plate, insulating pad, two conductors, insulator, and retaining ring, moves axially. During this movement, the first limiting plate compresses the spring. When the shaft reaches its designated position, the two conductors contact the two corresponding spring plates on the contact spring structure, thus connecting the circuit. When the circuit needs to be disconnected, the pressure at the push plate is released, allowing the pressing shaft to return to its initial position under the spring's reset action. This disconnects the contact between the two conductors and the two spring plates, thus breaking the circuit.
[0014] According to one embodiment of this utility model, the contact spring structure includes: a spring seat, two spring pieces, and a spring seat cover; the spring seat is fixedly supported in the mounting cavity, a second limiting plate abuts against the side wall of the spring seat, and a sliding groove is provided in the middle of the spring seat for sliding connection with the pressing shaft; the spring seat also has a first mounting groove and a second mounting groove, which are staggered relative to each other; both the first and second mounting grooves have openings that connect to the sliding groove; one end of each of the two spring pieces is supported in the first and second mounting grooves respectively, and the arc-shaped bends at one end of each of the two spring pieces movably overlap the openings, with a portion of the arc-shaped bends extending into the sliding groove through the openings. This arrangement allows the two conductors to contact the elastic arc-shaped bends of the spring pieces movably overlapping the openings when the pressing shaft moves axially along the sliding groove, thereby achieving simultaneous contact between the two sets of conductors and the spring pieces, ensuring smooth and highly reliable circuit connection. When the pressing shaft moves in the opposite direction, both sets of conductors and the spring are disconnected simultaneously, allowing the circuit to disconnect smoothly and reliably, thus achieving a highly reliable circuit switching.
[0015] According to the solution of this utility model, the flat push plate press-type limit switch of this utility model can achieve the following beneficial effects: The internal structure of this utility model adopts a sliding contact structure, which is compact. The switch push plate is made of titanium alloy, and the rest of the external parts are made of salt spray resistant stainless steel, which has good environmental performance. The push plate's pressing drive structure meets the relatively harsh installation environment and pressing height requirements of the overall model.
[0016] The limit switch of this utility model has a length of 85mm to 90mm, a width of only 13mm to 15mm, and a thickness of only 11mm to 13mm, with a smaller cross-sectional area. The overall structure of the product is more flat and miniaturized, and the switch shape design is more aerodynamic.
[0017] The conductor and the spring in the combination button of the limit switch of this utility model are designed in series and are arranged in a staggered manner. This achieves a double-set contact redundancy design in a small space, which can ensure the simultaneous opening and closing of two sets of circuits and the reliability of circuit switching.
[0018] The limit switch of this utility model has a boss on the push plate, and a concave groove with the same width as the button is opened on the contact surface between the boss and the button. This allows the button to slide smoothly in the concave groove of the boss during the rotation of the push plate, improving the smoothness of pressing the product. At the same time, the push plate also has a force limiting function to prevent excessive pressing force from damaging the switch.
[0019] The movement of the switch in this utility model is driven by the rotation of the push plate, which drives the combination button to move axially. This can convert rotation into axial pressing, thus satisfying the circuit function under extreme pressing conditions.
[0020] This utility model switch is small in size, simple to operate, and convenient to install. It adopts screw mounting support and can adapt to a variety of installation environments. Attached Figure Description
[0021] Figure 1 A schematic perspective view of a flat push-plate push-type limit switch according to one embodiment of the present invention; Figure 2 The schematic diagram shows a top sectional view of a flat push plate push-type limit switch according to one embodiment of the present invention. Figure 3 This schematic diagram illustrates the structure of a combination button according to one embodiment of the present invention. Figure 4 The diagram illustrates a cross-sectional view of a spring structure according to one embodiment of the present invention. Detailed Implementation
[0022] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the present invention, and are not intended to imply any limitation on the scope of the present invention.
[0023] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".
[0024] Figure 1 A schematic perspective view of a flat push-plate push-type limit switch according to one embodiment of the present invention; Figure 2 This schematic diagram shows a top sectional view of a flat push-plate push-button limit switch according to one embodiment of the present invention. Figure 1 and Figure 2 As shown, in this embodiment, the flat push-plate press-type limit switch includes: The outer casing 1 has a mounting cavity 2; The base 3 is located at one end of the mounting cavity 2, and has a through hole 4 in its center; Combination button 5 is set in the mounting cavity 2, with one end extending out of the outer shell 1 through the through hole 4 and slidingly sealed to the inner wall of the through hole 4 by the sealing ring 37. The combination button 5 is located on the outer wall of the other end of the mounting cavity 2, where conductive bodies 6 are arranged at intervals and in an alternating manner; The contact spring structure 7 is disposed in the mounting cavity 2 and is provided with spring pieces 8 that are respectively connected to each conductor. When the combination button 5 is pressed, it causes the conductors 6 to move axially. Each conductor 6 is connected to a corresponding spring 8. When the force pressing the combination button 5 is released, the combination button returns to its original position via the spring, and the conductors 6 are disconnected from the springs 8. This design allows the conductors 6 on the combination button 5 to move axially and either contact or disconnect with the springs, thus switching the circuit on and off. Furthermore, the sliding seal between the combination button 5 and the through hole 4 protects the switch from rain, sand, and dust.
[0025] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, it also includes a push plate 9, which is rotatably connected to the two mounting ears 10 of the base 3 via a pivot pin 36. The push plate 9 is provided with a boss 34 that can abut against one end of the combination button 5. This arrangement allows the boss 34 to contact the end of the combination button 5 by flipping the push plate 9, thus enabling the combination button 5 to be pressed, making the operation simple and convenient.
[0026] Furthermore, Figure 3 This is a schematic diagram illustrating the structure of a combination button according to one embodiment of the present invention. Figure 2 and Figure 3 As shown, in this embodiment, the combination button 5 includes: a pressing shaft 11, a first limiting plate 12, a spring 13, a second limiting plate 14, an insulating pad 15, two conductive bodies 6, an insulator 23, and a retaining ring 24. The pressing shaft 11 is arranged in the mounting cavity 2, with one end of it extending out of the outer shell 1 through the through hole 4; The first limiting plate 12 is fixedly sleeved on the pressing shaft 11, and the second limiting plate is movably sleeved on the pressing shaft 11. The first limiting plate 12 and the second limiting plate 14 are arranged at intervals between each other. The second limiting plate 14 abuts against the side wall of the touch spring structure 7. Spring 13 is disposed between the first limiting plate 12 and the second limiting plate 14; The insulating pad 15 is fitted onto the pressing shaft 11 and is located on the side of the second limiting plate 14 away from the spring 13; Two conductors 6 are arranged alternately and intermittently on the pressing shaft 11 by screws 38, located on the side of the insulating pad 15 away from the second limiting plate 14; The insulator 23 is sleeved on the pressing shaft 11 and is located on the side of the conductor 6 near the tail of the pressing shaft 11; A retaining ring 24 is located at the tail end of the pressing shaft 11. This arrangement allows the pressing shaft 11 to move axially when pressed by the push plate 9, causing the first limiting plate 12, insulating pad 15, two conductors 6, insulator 23, and retaining ring 24 to move along it. During this movement, the first limiting plate 12 compresses the spring 13. When the axial movement is complete, the two conductors 6 contact the two spring pieces 8 on the contact spring structure 7, thus connecting the circuit. When the circuit needs to be disconnected, the pressure at the push plate 9 is released, allowing the pressing shaft 11 to return to its initial position under the reset action of the spring 13. This disconnects the contact between the two conductors 6 and the two spring pieces 8, thus breaking the circuit.
[0027] Furthermore, Figure 4 This schematic diagram shows a cross-sectional view of a spring structure according to one embodiment of the present invention. Figure 2 and Figure 4 As shown, in this embodiment, the spring structure 7 includes: a spring seat 16, two spring plates 8, and a spring seat cover 17; The spring seat 16 is fixedly supported in the mounting cavity 2, the second limiting plate 14 abuts against the side wall of the spring seat 16, and the middle part of the spring seat 16 is provided with a sliding groove 18 that is slidably connected to the pressing shaft 11. The spring seat 16 is also provided with a first mounting groove 19 and a second mounting groove 20, which are staggered relative to each other; Both the first mounting groove 19 and the second mounting groove 20 are provided with openings 21 for the connecting slide groove 18; Two springs 8 have one end supported in the first mounting groove 19 and the second mounting groove 20, respectively. The arc-shaped bends 22 at one end of each spring 8 movably overlap the opening 21, and a portion of the arc-shaped bends 22 extends into the slide groove 18 through the opening 21. This arrangement allows the two conductors 6 to contact the elastic arc-shaped bends 22 of the springs 8 when the pressing shaft 11 moves axially along the slide groove 18, bringing them closer to the opening 21. This contact enables simultaneous contact between the two sets of conductors and the springs, ensuring smooth and reliable circuit connection. Conversely, when the pressing shaft 11 moves in the opposite direction, the two sets of conductors and the springs simultaneously disconnect, ensuring smooth and reliable circuit disconnection, thus achieving highly reliable circuit switching.
[0028] Furthermore, such as Figure 2 and Figure 4 As shown, in this embodiment, the inner wall of the mounting cavity 2 is provided with support bosses 25 on both sides, and the spring seat cover 17 includes a step portion 26 and a tail portion 27. The step portion 26 is engaged with the side of the support bosses 25. Two sets of sleeve assemblies 28 are provided at the tail of the spring seat cover 17. The other ends of the two springs 8 pass through the gap between the spring seat 16 and the spring seat cover 17 and extend into the corresponding sleeve assembly 28 respectively.
[0029] Furthermore, in this embodiment, the sleeve assembly 28 includes a heat shrink tubing and a crimped sleeve fitted over the heat shrink tubing.
[0030] Furthermore, such as Figure 2 As shown, in this embodiment, the present invention also includes: a cable clamp 29, a tail cover 35, and a connector 30; Cable clamp 29 is provided at the other end of mounting cavity 2 for fixing connector 30 and restraining wire 31 introduced from connector 30; The tail cover 35 is installed at the tail of the housing 1 and is connected to the cable clamp 29; The connector 30 is located inside the tail cover 35. Its lead wire 31 extends through the cable clamp 29 and into the sleeve assembly 28 to connect with the other end of the spring 8, thereby realizing the signal output function.
[0031] Furthermore, such as Figure 1 and Figure 2 As shown, this utility model also includes two mounting plates 32, which are symmetrically arranged on both sides of the outer casing 1, and each mounting plate 32 is provided with mounting holes 33. This arrangement allows the limit switch to be installed in a suitable position through the mounting holes 33.
[0032] According to the above-described solution of this utility model, the flat push-plate press-type limit switch of this utility model can achieve the following beneficial effects: The internal structure of this utility model adopts a sliding contact structure, which is compact. The switch push plate is made of titanium alloy, and the rest of the external parts are made of salt spray resistant stainless steel, which has good environmental performance. The push plate's pressing drive structure meets the relatively harsh installation environment and pressing height requirements of the overall model.
[0033] The limit switch of this utility model has a length of 85mm to 90mm, a width of only 13mm to 15mm, and a thickness of only 11mm to 13mm, with a smaller cross-sectional area. The overall structure of the product is more flat and miniaturized, and the switch shape design is more aerodynamic.
[0034] The conductor and the spring in the combination button of the limit switch of this utility model are designed in series and are arranged in a staggered manner. This achieves a double-set contact redundancy design in a small space, which can ensure the simultaneous opening and closing of two sets of circuits and the reliability of circuit switching.
[0035] The limit switch of this utility model has a boss on the push plate, and a concave groove with the same width as the button is opened on the contact surface between the boss and the button. This allows the button to slide smoothly in the concave groove of the boss during the rotation of the push plate, improving the smoothness of pressing the product. At the same time, the push plate also has a force limiting function to prevent excessive pressing force from damaging the switch. The movement of the switch in this utility model is driven by the rotation of the push plate, which drives the combination button to move axially. This can convert rotation into axial pressing, thus satisfying the circuit function under extreme pressing conditions.
[0036] This utility model switch is small in size, simple to operate, and convenient to install. It adopts screw mounting support and can adapt to a variety of installation environments.
[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A flat push plate push stroke switch characterized by, include: The outer casing (1) has a mounting cavity (2); The base (3) is located at one end of the mounting cavity (2), and a through hole (4) is provided in its center. A combination button (5) is provided in the mounting cavity (2), with one end extending out of the outer shell (1) through the through hole (4) and slidingly sealingly connected to the inner wall of the through hole (4); The combination button (5) is located on the outer wall of the other end of the mounting cavity (2) where conductive elements (6) are arranged at intervals and alternately. A spring structure (7) is provided in the mounting cavity (2) and is provided with spring pieces (8) that are respectively connected to each conductor. When the combination button (5) is pressed, the combination button (5) drives the conductor (6) to move axially. Each conductor (6) is connected to each spring (8). When the force of pressing the combination button is released, the combination button is reset by the spring, and each conductor (6) is disconnected from each spring (8).
2. The flat push plate press type travel switch according to claim 1, characterized by Also includes: Push plate (9), the push plate (9) and the two mounting ears (10) of the base (3) are rotatably connected by a pivot pin (36), and the push plate (9) is provided with a boss (34) that can abut against one end of the combination button (5).
3. The flat push paddle travel switch according to claim 1, wherein The combination button (5) includes: a pressing shaft (11), a first limiting plate (12), a spring (13), a second limiting plate (14), an insulating pad (15), two conductors (6), an insulator (23), and a retaining ring (24); The pressing shaft (11) is arranged in the mounting cavity (2), and one end of it extends out of the outer shell (1) through the through hole (4). The first limiting plate (12) is fixedly sleeved on the pressing shaft (11), and the second limiting plate is movably sleeved on the pressing shaft (11). The first limiting plate (12) and the second limiting plate (14) are arranged at intervals between each other. The spring (13) is disposed between the first limiting plate (12) and the second limiting plate (14); The insulating pad (15) is sleeved on the pressing shaft (11) and located on the side of the second limiting plate (14) away from the spring (13); Two conductors (6) are spaced apart and staggered on the pressing shaft (11), located on the side of the insulating pad (15) away from the second limiting plate (14); The insulator (23) is sleeved on the pressing shaft (11) and located on the side of the conductor (6) near the tail of the pressing shaft (11); The retaining ring (24) is located at the tail end of the pressing shaft (11).
4. The flat push plate press type travel switch according to claim 3, wherein The spring structure (7) includes: a spring seat (16), two springs (8) and a spring seat cover (17). The spring seat (16) is fixedly supported in the mounting cavity (2), and its middle part is provided with a sliding groove (18) that is slidably connected to the pressing shaft (11). The spring seat (16) is also provided with a first mounting groove (19) and a second mounting groove (20), and the first mounting groove (19) and the second mounting groove (20) are offset from each other; Both the first mounting groove (19) and the second mounting groove (20) are provided with openings (21) that communicate with the sliding groove (18); One end of each of the two springs (8) is supported in the first mounting groove (19) and the second mounting groove (20), and the arc-shaped bend (22) at one end of each of the two springs (8) is movably connected to the opening (21), and a part of the arc-shaped bend (22) extends into the slide groove (18) through the opening (21).
5. The flat push paddle travel switch according to claim 4, wherein The inner wall of the mounting cavity (2) is provided with support bosses (25) on both sides. The spring seat cover (17) includes a stepped part (26) and a tail part (27). The stepped part (26) is engaged with the support bosses (25). The tail of the spring seat cover (17) is provided with two sets of sleeve assemblies (28) spaced apart. The other ends of the two springs (8) pass through the gap between the spring seat (16) and the spring seat cover (17) and extend into the corresponding sleeve assembly (28).
6. The flat push paddle travel switch according to claim 5, wherein The sleeve assembly (28) includes a heat shrink tubing and a crimped sleeve fitted over the heat shrink tubing.
7. The flat push paddle travel switch according to claim 5, wherein Also includes: Cable clamp (29), tail cover (35) and connector (30); The cable clamp (29) is disposed at the other end of the mounting cavity (2) for fixing the connector (30). The tail cover (35) is installed at the tail of the housing (1) and connected to the cable clamp (29); The connector (30) is located inside the tail cover (35), and its lead wire (31) extends into the sleeve assembly (28) through the cable clamp (29) and connects to the other end of the spring (8).
8. The flat push bar travel switch according to any one of claims 1 to 7, characterized in that Also includes: Two mounting plates (32) are symmetrically arranged on both sides of the outer casing (1), and each mounting plate (32) is provided with mounting holes (33).