Double-pole four-position manual switch for flight control trim of airplane

Abstract

The utility model discloses an aircraft flight control trim double-pole four-position manual switch, which comprises an actuating mechanism (1), a shell (2), a pin (3), a cap (4) and a poke rod (6), and is characterized in that the poke rod (6) is inserted into the actuating mechanism (1) and penetrates through the pin (3), the actuating mechanism (1) is mounted in the shell (2), the cap (4) is mounted on the shell (2), and the poke rod (6) is sleeved with the cap (4). According to the utility model, the flexible sheet is connected with the action mechanism, the switch action is sensitive, double-pole synchronization is realized, the hand feeling is comfortable, and the operation is smooth.

Description

Technical Field

[0001] This utility model belongs to the field of switch technology, specifically relating to a double-pole four-position manual switch for aircraft flight control trim. Background Technology

[0002] The trim switch is a crucial component on the HOTAS control handle. Manual and electric trim systems typically require pilots to operate the trim switch to adjust the aircraft's pitch and roll attitude. Traditional trim switches use a rocker mechanism, where the ball end of an actuating lever slides across four rocker plates, causing the plates to flip and activate the switch. However, due to sliding friction between the ball end and the rocker plate, and the high spring force within the lever, the ball end exerts significant pressure on the rocker plate. The rounded end forms a flat surface, and the edges (ridges) of this surface increase drag as it slides across the rocker plate. Other drawbacks include poor wear resistance and a short lifespan. Wear and tear result in increased resistance when operating the actuating lever, leading to sluggish and unsmooth operation, hand fatigue, and poor synchronization between the two levers. This increases the difficulty of pilot operation and is unsuitable for the handling requirements of modern aircraft. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an aircraft flight control trim double-pole four-position manual switch that uses a flexible sheet to connect the action mechanism, has sensitive switching action, synchronous double-pole operation, comfortable feel, and smooth operation.

[0004] This utility model discloses a dual-pole four-position manual switch for aircraft flight control trim, comprising an actuating mechanism, a housing, a pin, a cap, and a toggle lever. The toggle lever is inserted into the actuating mechanism and passes through the pin. The actuating mechanism is installed inside the housing, and a cap is installed on the housing, which is then fitted onto the toggle lever.

[0005] The actuating mechanism consists of a base, a rocker arm, a tension spring, a bushing, a hanging rod, a stationary contact piece, a hook, a hook seat, a connecting piece, and contacts. A hanging rod is installed on the base, the upper end of the tension spring is hung on the hanging rod, and the lower end of the tension spring hooks the lower end of the rocker arm. A hook is hung on the upper end of the rocker arm, and the lower end of the hook hooks the hook seat. The hook seat is fixed on the base. Contacts are fixedly installed on the lower end of the rocker arm, and the contacts are connected by a connecting piece. A stationary contact piece is installed on the base, and the contacts are in contact with the stationary contact piece. The actuating rod is inserted into the bushing and passes through the pin.

[0006] The bushing is provided with several arc-shaped protrusions, which contact the hook.

[0007] The rocker arm can move with the hook.

[0008] The actuating lever is fitted with a sealing bowl, the lower end of which is mounted on the outer casing, and a positioning key is fixedly installed on the outer casing.

[0009] Compared with the prior art, this utility model has significant advantages. As can be seen from the above technical solution: the actuating mechanism is inserted into the actuating rod and a pin is inserted through it. The actuating mechanism is installed inside the outer shell. A cap is installed on the outer shell and fits onto the actuating rod. A hanging rod is installed on the base. The upper end of the tension spring is hung on the hanging rod, and the lower end of the tension spring hooks onto the lower end of the rocker arm. A hook is hung on the upper end of the rocker arm, and the lower end of the hook hooks onto the hook seat. The hook seat is fixed on the base. A contact point is fixedly installed on the lower end of the rocker arm. The contacts are connected by a connecting piece. A stationary contact piece is installed on the base, and the contacts contact the stationary contact piece. The actuating rod is inserted into the bushing and a pin is inserted through it. The switch features a dustproof, sealed structure. The head is a lever-operated cap, and the tail is a circuit soldering lead-out terminal. The outer casing serves as the product's mounting and fixing part, and it has a locating pin. Inside the structure, four-directional actuation mechanisms clamp the lever in the middle, keeping the cap in a neutral position. When the cap is levered in one direction, the bushing on the lever pushes the hook in that direction. The hook moves the rocker arm, creating a momentary action under the pull of the tension spring, causing the lower end of the rocker arm to move. Simultaneously, the double contacts on the lower ends of the two rocker arms contact the two stationary contacts, connecting the double-pole circuit. Releasing the lever causes the hook to automatically push the bushing and lever back to the neutral position under the tension spring, resetting the cap. At the same time, the double contacts on the lower ends of the two rocker arms separate from the two stationary contacts, disconnecting the double-pole circuit. The double-momentary mechanism, driven by the lever, rotates the hook, causing the rocker arm to flip under the force of the tension spring, thus turning the switch on. The contact between the rocker arm and the hook is a hinged rotating pair, characterized by low wear, long lifespan, sensitive and smooth operation, and comfortable force feel. A flexible sheet connects the two instantaneous movement mechanisms, causing their movements to mutually restrain each other and achieve synchronization. In summary, this utility model uses a flexible sheet to connect the movement mechanism, resulting in sensitive switching action, synchronized dual-blade operation, comfortable feel, and smooth operation. Attached Figure Description

[0010] Figure 1 This is the front view of this utility model;

[0011] Figure 2 yes Figure 1 Sectional view of AA;

[0012] Figure 3 This is a rear view of the present invention;

[0013] Figure 4 This is a schematic diagram of the structure of the action mechanism, pin, and actuating lever of this utility model;

[0014] Figure 5 This is a structural schematic diagram of the rocker arm, tension spring, hanging rod, static contact piece, hook, hook seat, connecting piece, and contact point of this utility model;

[0015] Figure 6 This is a structural schematic diagram of the base of this utility model;

[0016] Figure 7This is a schematic diagram of the structure of the bushing of this utility model;

[0017] Figure 8 This is an exploded view of this utility model;

[0018] Figure 9 This is the circuit diagram of this utility model.

[0019] Markings in the figure

[0020] 1. Actuating mechanism; 2. Housing; 3. Pin; 4. Cap; 5. Sealing bowl; 6. Actuating lever; 7. Positioning key; 101. Base; 102. Rocker arm; 103. Tension spring; 104. Bushing; 105. Hanging rod; 106. Static contact piece; 107. Hook; 108. Hook seat; 109. Connecting piece; 110. Contact point. Detailed Implementation

[0021] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structure, features, and effects of this utility model.

[0022] The purpose of this utility model and the solution to its main technical problem are achieved by the following technical solution:

[0023] This utility model discloses a dual-pole four-position manual switch for aircraft flight control trim, comprising an actuating mechanism 1, a housing 2, a pin 3, a cap 4, a sealing bowl 5, a toggle lever 6, and a positioning key 7. The key feature is that the toggle lever 6 is inserted into the actuating mechanism 1 and passes through the pin 3. The actuating mechanism 1 is installed inside the housing 2, and the cap 4 is mounted on the housing 2, covering the toggle lever 6. The actuating mechanism 1 consists of a base 101, a rocker arm 102, a tension spring 103, a bushing 104, a hanging rod 105, a stationary contact piece 106, a hook 107, a hook seat 108, a connecting piece 109, and a contact point 110. The hanging rod 105 is mounted on the base 101, and the upper end of the tension spring 103 is hung on the hanging rod 105. The lower end of the rocker arm 102 is hooked, and the upper end of the rocker arm 102 is hooked with a hook 107. The lower end of the hook 107 hooks a hook seat 108, which is fixed to the base 101. A contact 110 is fixedly installed on the lower end of the rocker arm 102. The contacts 110 are connected by a connecting piece 109. A stationary contact piece 106 is installed on the base 101. The contacts 110 contact the stationary contact piece 106. The toggle lever 6 is inserted into the bushing 104 and passes through the pin 3. The bushing 104 is provided with several arc-shaped protrusions, which contact the hook 107. The rocker arm 102 can move with the hook 107. A sealing bowl 5 is fitted on the toggle lever 6. The lower end of the sealing bowl 5 is installed on the outer shell 2. A positioning key 7 is fixedly installed on the outer shell 2.

[0024] In use, the cap 4 is moved to one position. The cap 4 drives the bushing 104 on the lever 6 to push the hook 107 in that direction. The hook 107 drives the rocker arm 102 to move. Under the pull of the tension spring 103, a momentary action is generated, causing the lower end of the rocker arm 102 to move. At the same time, the double contacts on the lower ends of the two rocker arms 102 contact the two stationary contact pieces 106 to connect the double-pole circuit, release the lever 6, and the hook 107 automatically pushes the bushing and lever back to the neutral position through the pulling force of the tension spring 103. The cap is reset. At the same time, the double contacts on the lower ends of the two rocker arms 102 separate from the two stationary contact pieces 106 and disconnect the double-pole circuit.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A dual-pole four-position manual switch for aircraft flight control trim, comprising an actuating mechanism (1), a housing (2), a pin (3), a cap (4), and a lever (6), characterized in that: The lever (6) is inserted into the action mechanism (1) and the pin (3) is inserted into it. The action mechanism (1) is installed inside the housing (2). A cap (4) is installed on the housing (2). The cap (4) is fitted onto the lever (6).

2. The aircraft flight control trim dual-pole four-position manual switch as described in claim 1, characterized in that; The actuating mechanism (1) consists of a base (101), a rocker arm (102), a tension spring (103), a bushing (104), a hanging rod (105), a stationary contact piece (106), a hook (107), a hook seat (108), a connecting piece (109), and a contact point (110). The hanging rod (105) is mounted on the base (101), the upper end of the tension spring (103) is hung on the hanging rod (105), and the lower end of the tension spring (103) hooks the lower end of the rocker arm (102). The rocker arm (104) is connected to the rocker arm (105). 2) A hook (107) is hung on the upper end. The lower end of the hook (107) hooks onto the hook seat (108). The hook seat (108) is fixed on the base (101). A contact (110) is fixedly installed on the lower end of the rocker arm (102). The contacts (110) are connected by a connecting piece (109). A stationary contact piece (106) is installed on the base (101). The contacts (110) contact the stationary contact piece (106). The lever (6) is inserted into the bushing (104) and passes through the pin (3).

3. The aircraft flight control trim dual-pole four-position manual switch as described in claim 2, characterized in that; The bushing (104) is provided with several arc-shaped protrusions, which contact the hook (107).

4. The aircraft flight control trim dual-pole four-position manual switch as described in claim 2, characterized in that; The rocker arm (102) can move with the hook (107).

5. The aircraft flight control trim dual-pole four-position manual switch as described in claim 1, characterized in that; The toggle lever (6) is fitted with a sealing bowl (5), the lower end of the sealing bowl (5) is mounted on the outer shell (2), and a positioning key (7) is fixedly installed on the outer shell (2).

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