Rotary push switch

Abstract

The invention discloses a rotary push switch, which is characterized in that the upper end of a rotary rod (5) penetrates into a knob (2) and is inserted into a contact for connection, a spring D (23) and a steel ball B (24) are respectively placed in a mounting plate (6), a shift gear (25) penetrates into the rotary rod (5) and is covered with a panel (21), an outer stop lug gasket (20) is mounted below the panel (21), limit gaskets (22) are mounted in the outer stop lug gasket (20), a stop lug gasket (26) is mounted between the two limit gaskets (22), and the stop lug gasket (26) is connected with the rotary rod (5). A bottom plate (19) is placed below a lug stopping gasket (26), a bolt is screwed into the bottom plate (19), a spring A (1), a steel ball A (3) and a spring B (4) are respectively placed in a rotating rod (5) and inserted into a pressing rod (10), a connecting sleeve (9) is sleeved outside the rotating rod (5) and inserted into a positioning pin (18), and a spring C (8) is placed on the side face of the connecting sleeve (9) and penetrates into a contact (7). The electric contact part is stable in electric load resistance, long in service life and reliable in work.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to a rotary push switch. Background Art

[0002] The aircraft engine start switch is a very important device, usually a rotary push switch with multiple gears, such as OFF, START, BOTH, etc., which is used to control different start modes and ignition systems. The design of this rotary switch allows the pilot to select the start mode by rotating the knob, and provides the necessary ignition and starting support during the start process.

[0003] The traditional rotary push switch electrical contact structure uses a contact piece as a contact point, which slides with a spring piece to connect the circuit. Its disadvantages are the sliding electrical contact method, short life (less than 30,000 levels), and unreliable operation. The manual switch also requires a large pressing stroke to sense the execution in place and a comfortable human-machine efficiency operation effect. The large stroke and long sliding friction distance of the contact piece lead to large wear. After gradual wear, the contact pressure decreases and the conductivity is unreliable. In severe cases, it cannot contact and cannot conduct electricity. The metal powder produced by wear is likely to cause short circuits between circuits and cause false connection. The speed of sliding contact is determined by the speed of the operator, resulting in unstable contact and separation between the contact piece and the spring piece, which is easy to cause continuous and violent arcs to produce a large amount of carbon deposits, affecting the stability of conductivity, and also burning the contact piece and the spring piece, or the two are welded together and cannot be separated. Therefore, the sliding contact switch with poor durability is no longer suitable for the high life and high reliability requirements of modern aircraft for rotary push switches. Summary of the invention

[0004] The object of the present invention is to overcome the above disadvantages and provide a rotary push switch with stable electrical load resistance performance of the electrical contact part, long service life and reliable operation.

[0005] The invention discloses a rotary push switch, comprising a spring A, a knob, a steel ball A, a spring B, a rotating rod, a mounting plate, a contact, a spring C, a connecting sleeve, a pressing rod, a positioning pin, a bottom plate, an outer stop ear washer, a panel, a limiting washer, a spring D, a steel ball B, a gear gear, and a stop ear washer. The switch is characterized in that the upper end of the rotating rod is inserted into the knob and the contact is connected, the spring D, the steel ball B, and the gear gear are respectively placed in the mounting plate and inserted into the rotating rod to cover the upper panel, the outer stop ear washer is installed under the panel, the limiting washer is installed in the outer stop ear washer, the stop ear washer is installed between the two limiting washers, the bottom plate is placed under the stop ear washer and a bolt is screwed in, the spring A, the steel ball A, and the spring B are respectively placed in the rotating rod and inserted into the pressing rod, the connecting sleeve is placed outside the rotating rod and the positioning pin is inserted, and the spring C is placed on the side of the connecting sleeve and penetrates the contact.

[0006] The steel ball B is in contact with the gear position gear.

[0007] The contact point can rotate with the rotating rod.

[0008] The pressing rod can move up and down, and the contact point can move up and down along with the pressing rod.

[0009] A wire board is installed under the rotating rod, and a plurality of micro switches are installed on the wire board. The plurality of micro switches are in contact with the contacts respectively. The lower end of the sleeve is placed on the upper and lower sides of the wire board, and the positioning plate is covered with a bushing, and the outer shell is screwed in with bolts. The upper end of the outer shell is connected to the mounting plate.

[0010] Compared with the prior art, the present invention has obvious beneficial effects; it can be known from the above technical scheme that by rotating the knob, the rotating rod drives the gear gear to rotate, the gear gear squeezes the steel ball to compress the spring, and the steel ball automatically crosses the next tooth valley when it passes over the gear gear tooth peak, so as to realize the gear change and generate a snap-action feel at the same time. The number of gears is obtained by misaligning and superimposing the inner stop ears of two inner stop ear washers, and the angle range surrounded by the two limits the rotation angle of the stop ear of the outer stop ear washer. Pressing the pressing rod, the pressing rod squeezes the steel ball A in the hole into the rotating rod hole, so as to realize the downward movement of the pressing rod and generate a snap-action feel at the same time. When the knob is rotated to the gear position where the switch needs to be turned on, the knob rod drives the connecting sleeve to rotate, and the connecting sleeve drives the contact to rotate to the top of the corresponding micro switch. When the pressing rod is pressed, the pressing rod drives the contact to move downward to press the micro switch to realize the circuit connection. The present invention is a novel structure combining a rotating mechanism, a button mechanism and a micro switch, and uses a rotating mechanism to realize the knob gear selection function, and a button mechanism realizes the circuit connection function of the micro switch action by pressing. However, since the micro switch itself has a small stroke, it cannot directly meet the human-machine efficiency operation effect of a large pressing stroke. The mechanism part that actuates the micro switch on the button mechanism adopts a retractable structure to match the small stroke of the micro switch. Its advantages are that the rotation, pressing and electrical contact structures are independent, and the operating hand speed does not affect the electrical contact. The micro switch has high wear resistance (above 100,000 levels) and stable electrical load resistance, so as to achieve the purpose of high life and high reliability of the rotary switch. In short, the key electrical contact part of the present invention has stable electrical load resistance, high life and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of the present invention; Figure 2 yes Figure 1 Sectional view of AA; Figure 3 is the internal structure of the present invention; Figure 4 is an exploded view of the present invention; Figure 5 yes Figure 4 Enlarged view of a; Figure 6 yes Figure 4 b is an enlarged view; Figure 7 It is a schematic structural diagram of the outer ear stop gasket of the present invention; Figure 8 It is a structural schematic diagram of the ear-stopping gasket of the present invention.

[0012] Marking in the figure 1. Spring A, 2. Knob, 3. Steel ball A, 4. Spring B, 5. Rotating rod, 6. Mounting plate, 7. Contact, 8. Spring C, 9. Connecting sleeve, 10. Press rod, 11. Sleeve, 12. Positioning plate, 13. Bushing, 14. Bolt, 15. Housing, 16. Wire plate, 17. Micro switch, 18. Locating pin, 19. Bottom plate, 20. External stop ear washer, 21. Panel, 22. Limit washer, 23. Spring D, 24. Steel ball B, 25. Shift gear, 26. Stop ear washer. DETAILED DESCRIPTION

[0013] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0014] The purpose of the present invention and the solution of its main technical problems are achieved by adopting the following technical solutions: A rotary push switch of the present invention comprises a spring A1, a knob 2, a steel ball A3, a spring B4, a rotating rod 5, a mounting plate 6, a contact 7, a spring C8, a connecting sleeve 9, a pressing rod 10, a sleeve 11, a positioning plate 12, a bushing 13, a bolt 14, a housing 15, a wire plate 16, a micro switch 17, a positioning pin 18, a bottom plate 19, an outer stop ear washer 20, a panel 21, a limit washer 22, a spring D23, a steel ball B24, a gear gear 25, and a stop ear washer 26. The switch is characterized in that the upper end of the rotating rod 5 penetrates the knob 2 and is inserted into the contact for connection, the spring D23, the steel ball B24, and the gear gear 25 are respectively placed in the mounting plate 6, penetrate the rotating rod 5 and cover the panel 21, an outer stop ear washer 20 is installed under the panel 21, a limit washer 22 is installed in the outer stop ear washer 20, and a stop washer 26 is installed between the two limit washers 22. Ear washer 26, bottom plate 19 is placed under ear washer 26 and screwed into bolts, steel ball A3, spring A1, steel ball A3 and spring B4 are respectively placed in rotating rod 5 and inserted into pressing rod 10, both ends of spring A1 are respectively against steel ball A3, connecting sleeve 9 is put on the outside of rotating rod 5 and positioning pin 18 is inserted, spring C8 is put on the side of connecting sleeve 9 and penetrates contact 7, steel ball B24 contacts with gear gear 25, contact 7 can rotate with rotating rod 5, pressing rod 10 can move up and down, contact 7 can move up and down with pressing rod 10, wire plate 16 is installed under rotating rod 5, several micro switches 17 are installed on wire plate 16, several micro switches 17 are respectively in contact with contact 7, sleeve 11 is placed on upper and lower surfaces of wire plate 16, positioning plate 12 is put on lower end, bushing 13 is put on outer shell 15 and screwed into bolt 14, and the upper end of outer shell 15 is connected with mounting plate 6.

[0015] When in use; rotate the knob 2, the rotating rod 5 drives the gear gear 25 to rotate, the gear gear 25 squeezes the steel ball 24 to compress the spring 23, and the steel ball 24 automatically crosses the next tooth valley when it crosses the gear gear 25 tooth peak, thereby realizing gear change and generating a snap-action feel. The number of gears is determined by staggering and superimposing the inner stop ears of the two inner stop ear washers 26, and the angle range formed by the two limits the rotation angle of the stop ears of the outer stop ear washers 20. Press the pressing rod 10, and the pressing rod 10 squeezes the two steel balls A3 in the hole into the rotating rod holes respectively, thereby realizing the downward movement of the pressing rod 10 and generating a snap-action feel. When the knob 2 is rotated to the gear position where the switch needs to be turned on, the knob rod 5 drives the connecting sleeve 9 to rotate, and the connecting sleeve 9 drives the contact 7 to rotate to the top of the corresponding microswitch 17. When the pressing rod 10 is pressed, the pressing rod 10 drives the contact 7 to move downward to press the microswitch 17, thereby connecting the circuit.

[0016] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A rotary push switch, comprising a spring A (1), a knob (2), a steel ball A (3), a spring B (4), a rotating rod (5), a mounting plate (6), a contact (7), a spring C (8), a connecting sleeve (9), a pressing rod (10), a positioning pin (18), a bottom plate (19), an outer stop ear washer (20), a panel (21), a limit washer (22), a spring D (23), a steel ball B (24), a gear position gear (25), and a stop ear washer (26), characterized in that: The upper end of the rotating rod (5) is inserted into the knob (2) and the contact is connected. The spring D (23), the steel ball B (24) and the gear gear (25) are respectively placed in the mounting plate (6) and are inserted into the rotating rod (5) to cover the panel (21). An outer stop ear washer (20) is installed below the panel (21). A limit washer (22) is installed inside the outer stop ear washer (20). A stop ear washer (26) is installed between the two limit washers (22). A bottom plate (19) is placed below the stop ear washer (26) and a bolt is screwed in. The spring A (1), the steel ball A (3) and the spring B (4) are respectively placed in the rotating rod (5) and inserted into the pressing rod (10). The outer side of the rotating rod (5) is covered with a connecting sleeve (9) and the positioning pin (18) is inserted. The spring C (8) is placed on the side of the connecting sleeve (9) and is inserted into the contact (7).

2. The rotary push switch according to claim 1, characterized in that; The steel ball B (24) is in contact with the gear position gear (25).

3. The rotary push switch according to claim 1, characterized in that; The contact point (7) can rotate along with the rotating rod (5).

4. The rotary push switch according to claim 1, characterized in that; The pressing rod (10) can move up and down, and the contact point (7) can move up and down along with the pressing rod (10).

5. The rotary push switch according to claim 1, characterized in that; A wire plate (16) is installed below the rotating rod (5), and a plurality of micro switches (17) are installed on the wire plate (16). The plurality of micro switches (17) are in contact with the contact points (7) respectively. The wire plate (16) is provided with sleeves (11) on the upper and lower surfaces respectively, and the lower end of the wire plate (16) is covered with a positioning plate (12), covered with a bushing (13), covered with a housing (15), and screwed with bolts (14). The upper end of the housing (15) is connected to the mounting plate (6).

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