CN114582653A

CN114582653A - Miniature travel switch

Info

Publication number: CN114582653A
Application number: CN202210383428.3A
Authority: CN
Inventors: 谭素; 李永权; 陈兴
Original assignee: G & A Technologies Co ltd
Current assignee: G & A Technologies Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-06-03

Abstract

The invention discloses a micro travel switch, which comprises a machine body, a pressing assembly and a circuit opening and closing assembly, wherein the machine body comprises an upper cylinder and a lower cylinder, and a cylinder hole of the lower cylinder is a stepped upper inner cavity hole and a stepped lower inner cavity hole; the pressing assembly comprises a guide sleeve, a pressing rod I and a pressing rod II, the guide sleeve is in sliding fit with the guide hole I of the upper cylinder, the pressing rod I penetrates through a sleeve hole of the guide sleeve, and the upper part of the pressing rod II is screwed on the lower part of the pressing rod I; the circuit switching subassembly includes the conducting ring, insulating clamping ring, insulating seat and electric conductor, the direction section that press lever II was cooperated in to the guiding hole II of conducting ring, the conducting ring and press lever between I pressure spring II, insulating clamping ring cooperates on inner chamber hole upper portion down, inner chamber hole lower part is located down to insulating seat in insulating clamping ring bottom, a left side, insulating seat is worn to locate by the electric conductor of right side symmetry, a left side, the upper end outside of right electric conductor compresses tightly between insulating seat and insulating clamping ring, the inside conducting ring that is located to the upper end, pressure spring I is equipped with to the pressure between insulating clamping ring and the uide bushing.

Description

Miniature travel switch

Technical Field

The invention relates to a component for switching on and off a circuit, in particular to a microminiature travel switch.

Background

The miniature travel switch is used for an electrical control system in a special industry, realizes the on and off functions of a circuit for the control system, is a key component of the control system of a special electrical appliance, and has higher and lower requirements on various technical indexes of element development and smaller requirements on weight and volume along with the rapid development of scientific technology in China in recent years.

Due to the unique characteristics of the miniature travel switch, the miniature travel switch is widely applied to a plurality of electrical control devices. The miniature travel switch is required to work normally in the natural environment of humidity, high temperature and low temperature (-65-125 ℃), sand dust, rain, mould and salt fog, and in the mechanical environment of centrifugation, vibration and impact.

The travel switch adopts high-strength structural design such as external sealing, snap contact and the like, and has long service life of 25000 times. Therefore, for the sealing structure of the miniature travel switch, the reliable design of the contact on-off switching structure is the key point for the miniature travel switch to work normally.

Disclosure of Invention

The invention aims to solve the technical problem of providing a microminiature travel switch which can reliably realize the on-off function of a circuit.

The micro travel switch capable of solving the technical problems comprises a machine body, a pressing component and a circuit opening and closing component, wherein the pressing component and the circuit opening and closing component are arranged on the basis of the machine body, and the micro travel switch is different from the micro travel switch in that:

1. the machine body comprises an upper cylinder and a lower cylinder which are coaxial, a coaxial guide hole I is formed in the upper cylinder, the cylinder hole of the lower cylinder is a stepped coaxial upper inner cavity hole (small) and a lower inner cavity hole (large), and the upper inner cavity hole is communicated with the guide hole I.

2. The pressing assembly comprises a guide sleeve, a pressing rod I and a pressing rod II, the guide sleeve is in sliding fit with the guide hole I, the lower end of the guide sleeve is limited upwards at the top of the upper inner cavity hole, the pressing rod I penetrates through the sleeve hole of the guide sleeve and is located at the bottom of the guide sleeve, a button tightly pressed at the top of the guide sleeve is screwed at the top of the pressing rod I, and the upper portion of the pressing rod II is screwed at the bottom of the pressing rod I.

3. The circuit switching subassembly includes conducting ring, insulating clamping ring, insulating seat and electric conductor, the conducting ring cooperates in the direction section of II lower parts of press bars through guiding hole II at top and spacing in the lower part of press bars II downwards, press bars II between conducting ring and the press bars I go up the pressure spring II of pressure equipment, insulating clamping ring cooperates in the upper portion of interior cavity hole down and spacing in last interior cavity hole upwards, insulating seat locates the lower part of interior cavity hole under insulating clamping ring bottom and downwards by the border binding off of cylinder section of thick bamboo lower part section of thick bamboo wall and axial spacing, and the electric conductor of left and right symmetry wears to locate insulating seat, and the upper end outside of left and right electric conductor compresses tightly between insulating seat and insulating clamping ring, and the upper end inside of left and right electric conductor is counterpointed in between the conducting ring, the downthehole pressure spring I that is equipped with of last interior cavity between insulating clamping ring and the uide bushing.

In order to facilitate the switch to be installed in place, the outer circumference of the upper cylinder is provided with an external thread, the top of the lower cylinder at the bottom of the external thread is provided with a coaxial annular groove, and a sealing ring is arranged in the annular groove.

The switch mounting mode is as follows: the upper cylinder upwards penetrates through the mounting hole of the base plate, and the locking nut is screwed on the external thread of the upper cylinder to fix the lower cylinder on the base plate.

Under the on-off state, the upward return uide bushing of pressure spring I, press lever I and press lever II, the downward return conducting ring of pressure spring II, the distance between the bottom of pressing the lever and the upper end of left and right electric conductor is the full stroke S of pressing of button, the distance between the bottom of conducting ring and the upper end of left and right electric conductor is the switch-on stroke S1 that the button was pressed, and the distance between the bottom of pressing the lever II and the bottom of conducting ring is the switch-on overtravel S2 that the button was pressed.

The invention has the beneficial effects that:

1. in the structure of the miniature travel switch, the button is smooth when pressed, the phenomena of jam and power failure do not exist, the conducting ring can smoothly connect the left and right conductors to realize the conducting function of a circuit, and the miniature travel switch is suitable for special control equipment and civil electrical control systems.

2. In the structure of the invention, the conducting ring is stably contacted with the left and right conductors, is safe and reliable when being separated, and is not influenced by severe natural environment and harsh mechanical environment.

3. The invention has compact structure, small volume, light weight, good sealing performance, electromagnetic interference shielding and good universality.

Drawings

FIG. 1 is a schematic illustration of an installation of one embodiment of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the embodiment of fig. 1, showing the switch in an off state.

Fig. 3 is a schematic diagram of the internal structure of the embodiment of fig. 1, showing the switch in the on state.

Fig. 4 is a schematic view of the internal structure of the housing in the embodiment of fig. 1.

Fig. 5 is a schematic structural diagram of the partial pressing assembly and the partial circuit opening and closing assembly in the embodiment of fig. 1.

Fig. 6(a) is a schematic structural view of the partial circuit opening and closing assembly in the embodiment of fig. 1 (a cross-sectional view a-a in fig. 6 (b)).

Fig. 6(b) is a plan view of fig. 6 (a).

And (3) identifying the figure number: 1. a body; 1-1, an upper cylinder; 1-2, putting a cylinder; 2. a guide hole I; 3. a guide sleeve; 4. a pressing rod I; 5. an upper lumen hole; 6. a lower lumen hole; 7. a pressing rod II; 8. conducting rings; 9. insulating compression rings; 10. an insulating base; 11. an electrical conductor; 12. a pressure spring II; 13. a pressure spring I; 14. a button; 15. locking the nut; 16. an annular groove; 17. a seal ring; 18. a substrate; 19. and (7) a gasket.

Detailed Description

The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.

The micro travel switch of the invention comprises a machine body 1 arranged on a substrate 18, and a pressing component and a circuit opening and closing component which are arranged based on the machine body 1, as shown in figure 1.

The machine body 1 comprises a small-diameter upper cylinder 1-1 and a large-diameter lower cylinder 1-2 which are coaxial, a coaxial guide hole I2 is formed in the upper cylinder 1-1, a stepped cylinder hole of the lower cylinder 1-2 comprises an upper inner cavity hole 5 and a lower inner cavity hole 6 which are coaxial, the inner diameter of the upper inner cavity hole 5 is smaller than that of the lower inner cavity hole 6, the guide hole I2 is communicated with the upper inner cavity hole 5, an external thread is formed on the outer circumferential surface of the upper cylinder 1-1, an annular groove 16 is formed in the top of the lower cylinder 1-2 at the bottom of the external thread, and a sealing ring 17 is arranged in the annular groove 16, as shown in figure 4.

The pressing assembly comprises a guide sleeve 3, a pressing rod I4 and a pressing rod II 7, the guide sleeve 3 is in sliding fit in a guide hole I2 of an upper cylinder 1-1, a ring body with the diameter of the lower end of the guide sleeve 3 being increased is arranged in an upper inner cavity hole 5 of a lower cylinder 1-2, the pressing rod I4 is matched in a sleeve hole of the guide sleeve 3, a shaft body with the diameter of the lower end of the pressing rod I4 being increased is positioned at the bottom of the guide sleeve 3, coaxial threaded holes are formed in the top and the bottom of the pressing rod I4, a button 14 tightly pressed on the top of the guide sleeve 3 is screwed in a threaded hole in the upper end of the pressing rod I4, the pressing rod II 7 comprises an upper external thread section, a lower guide section and a shaft body with the diameter being increased, an upper external thread section of the pressing rod II 7 is screwed in a bottom threaded hole of the pressing rod I4, and an insulator is arranged at a screwing part of the two to block conduction of the pressing rod II 7 and the pressing rod I4, as shown in fig. 2 and 3.

The circuit switching assembly comprises a conducting ring 8, an insulating press ring 9, an insulating seat 10 and a conductor 11. The top of the conducting ring 8 is provided with a guide hole II, the conducting ring 8 is in sliding fit with the guide section of the pressing rod II through the guide hole II and is limited at the lower end of the pressing rod II 7 downwards, and a pressure spring II 12 is pressed on the guide section of the pressing rod II 7 between the conducting ring 8 and the bottom of the pressing rod I4; the insulating compression ring 9 is matched in the lower inner cavity hole 6 of the lower cylindrical barrel 1-2, and the top of the insulating compression ring 9 is limited at the bottom of the upper inner cavity hole 5; the top of the insulating seat 10 is provided with a coaxial counter bore, the counter bore is provided with square holes which are symmetrical left and right and penetrate through the insulating seat 10, the insulating seat 10 is matched with the bottom of the insulating compression ring 9 in the lower inner cavity hole 6, and the lower part of the insulating seat 10 is axially limited by the cylinder wall of the bottom peripheral closing-up of the lower cylindrical cylinder 1-2; the electric conductor 11 is a T-shaped contact element which is symmetrical left and right, the upper end semicircle of the left contact element is positioned in a left semicircle hole of a counter bore at the top of the insulation seat 10, the left half part of the upper end semicircle of the left contact element is compressed by the insulation compression ring 9, the lower end wiring part of the left contact element passes through a left square hole and vertically extends downwards out of the insulation seat 10, the upper end semicircle of the right contact element is positioned in a right semicircle hole of the counter bore at the top of the insulation seat 10, the right half part of the upper end semicircle of the right contact element is compressed by the insulation compression ring 9, and the lower end wiring part of the right contact element passes through a right square hole and vertically extends downwards out of the insulation seat 10; a pressure spring I13 for press mounting is arranged in the upper inner cavity hole 5 between the bottom of the guide sleeve 3 and the top of the insulating compression ring 9, and a gasket 19 is arranged at the contact part of the lower end of the pressure spring I13 and the insulating compression ring 9, as shown in fig. 2, 3, 4, 5, 6(a) and 6 (b).

Fig. 2 shows an off state of the switch, at this time, the pressure spring i 13 and the pressure spring ii 12 are in a free state of press-fitting, the guide sleeve 3 is reset upward and axially limited by the top of the upper inner cavity hole 5, the button 14 is ejected upward and stays at a high position to be pressed, the conductive ring 8 is reset downward and limited at the lower end of the pressing rod ii 7, the lower end of the conductive ring 8 is located at a ring opening of the insulating press ring 9 and corresponds downward between a right semicircular body of the left contact element and a left semicircular body of the right contact element; the distance between the bottom of the pressing rod II 7 and the tops of the left and right contact members is the pressing full stroke S of the button 14, the distance between the bottom of the conductive ring 8 and the tops of the left and right contact members is the closing stroke S1 (the switch circuit is turned on) pressed by the button 14, and the distance between the bottom of the pressing rod II 7 and the bottom of the conductive ring 8 is the closing overtravel S2 (the switch circuit is continuously turned on) pressed by the button 14.

Fig. 3 shows the on state of the switch, in the section of the switch-on stroke S1 (1.7mm) that the button 14 is pressed, the compression spring i 13 is compressed, the descending conductive ring 8 enters the annular hole of the insulating press ring 9 and presses against the left and right conductors 11 to conduct the circuit, in the section of the switch-on overtravel S2 (1.3mm) that the button 14 is continuously pressed, the compression spring ii 12 is compressed, the conductive ring 8 continues to press against the left and right conductors 11 to conduct the circuit, and the bottom of the pressing rod ii 7 presses against the left and right conductors 11 to stop.

When the press is released, the button 14 returns, and the conductive ring 8 is separated from the left and right conductors 11 to break the circuit.

The way in which the housing 1 is mounted on the substrate 18 is:

the upper cylinder 1-1 penetrates through a corresponding mounting hole on the base plate 18 upwards, at least one locking nut 15 is screwed on the external thread of the upper cylinder 1-1 to fix the lower cylinder 1-2 at the bottom of the base plate 18, and the sealing ring 17 seals a gap between the base plate 18 and the lower cylinder 1-2, as shown in fig. 1, 2 and 3.

The microminiature structure of the invention has compact structure and small volume, and the microminiature structure can be made into a product with the specification of one model, the external dimension of the microminiature structure is 21.6mm multiplied by 7mm, and the weight of the microminiature structure is only 2 g.

Claims

1. Microminiature travel switch, including organism (1) and based on press the subassembly and the circuit switching subassembly that organism (1) set up, its characterized in that:

the machine body (1) comprises an upper cylinder (1-1) and a lower cylinder (1-2) which are coaxial, a coaxial guide hole I (2) is formed in the upper cylinder (1-1), the cylinder holes of the lower cylinder (1-2) are an upper inner cavity hole (5) and a lower inner cavity hole (6) which are stepped and coaxial, and the upper inner cavity hole (5) is communicated with the guide hole I (2);

the pressing assembly comprises a guide sleeve (3), a pressing rod I (4) and a pressing rod II (7), the guide sleeve (3) is in sliding fit with the guide hole I (2), the lower end of the guide sleeve is limited upwards at the top of the upper inner cavity hole (5), the pressing rod I (4) penetrates through the sleeve hole of the guide sleeve (3), the lower end of the pressing rod I is located at the bottom of the guide sleeve (3), a button (14) tightly pressed at the top of the guide sleeve (3) is screwed at the top of the pressing rod I (4), and the upper part of the pressing rod II (7) is screwed at the lower part of the pressing rod I (4);

the circuit opening and closing assembly comprises a conducting ring (8), an insulating press ring (9), an insulating seat (10) and a conductor (11), wherein the conducting ring (8) is matched with a guide section at the lower part of a pressing rod II (7) through a guide hole II at the top and is downwards limited at the bottom of the pressing rod II (7), a pressure spring II (12) is pressed on the pressing rod II (7) between the conducting ring (8) and the pressing rod I (4), the insulating press ring (9) is matched with the upper part of a lower inner cavity hole (6) and is upwards limited in an upper inner cavity hole (5), the insulating seat (10) is arranged at the bottom of the insulating press ring (9) and is downwards limited by a peripheral ring of the lower cylinder barrel wall (1-2) in an axial direction, the conductor (11) which is symmetrical to the left and the right penetrates through the insulating seat (10), and the outer parts of the upper ends of the left and the right conductors are tightly pressed between the insulating seat (10) and the insulating press ring (9), the upper ends of the left and right conductors are internally aligned to the conducting ring (8), and a pressure spring I (13) is pressed in an upper inner cavity hole (5) between the insulating compression ring (9) and the guide sleeve (3).

2. The micro-miniature travel switch of claim 1, wherein: an external thread is arranged on the outer circumference of the upper cylinder (1-1), a coaxial annular groove (16) is arranged on the top of the lower cylinder (1-2) at the bottom of the external thread, and a sealing ring (17) is arranged in the annular groove (16).

3. A microminiature travel switch as set forth in claim 2, wherein: the upper cylinder (1-1) upwards penetrates through a mounting hole of the base plate (18), and the locking nut (15) is screwed on the external thread of the upper cylinder (1-1) to fix the lower cylinder (1-2) on the base plate (18).

4. A micro-miniature travel switch according to any of claims 1-3, wherein: under the on-off state, pressure spring I (13) return guide sleeve (3) that makes progress, press lever I (4) and press lever II (7), pressure spring II (12) return conducting ring (8) down, the distance between the bottom of pressing lever II (7) and the upper end of left and right electric conductor is the full stroke S of pressing of button (14), the distance between the bottom of conducting ring (8) and the upper end of left and right electric conductor is the switch-on stroke S1 that button (14) pressed, and the distance between the bottom of pressing lever II (7) and the bottom of conducting ring (8) is the switch-on overtravel S2 that button (14) pressed.