Ignition switch with positive and negative rotation interlocking limiting function

Abstract

The utility model relates to an ignition switch with positive and negative rotation interlocking and limiting functions, which comprises a base provided with a plurality of contacts and lug plates, a sleeve is connected onto the base, and a driving rod with a contact blade is rotatably arranged in a cavity formed between the base and the sleeve; a limiting seat is embedded in the inner wall of the sleeve, a rotating body is rotationally arranged in an internal hollow structure of the limiting seat, and the bottom of the rotating body is movably connected with the driving rod; the annular side wall of the limiting seat is provided with a first limiting groove and a second limiting groove which are different in height and are horizontal sliding grooves, and a notch. A protruding stop block is arranged on the side wall of the rotating body. The interlocking limiting device is simple in structure, low in cost and good in reliability, and interlocking limiting of forward and reverse rotation can be achieved without an additional interlocking mechanism or circuit.

Description

Technical Field

[0001] The utility model relates to an ignition switch with forward and reverse interlocking limit functions, belonging to the technical field of electrical switches. Background Art

[0002] A rotary switch is a commonly used switch-type electrical component that plays functions such as on-off and triggering signals in circuits. In some industrial applications, such as the start and stop of equipment such as engineering vehicles and production lines, a key-type ignition switch is required. After inserting the key, the appropriate gear is selected by rotating the unlocking method. Therefore, in order to prevent excessive rotation or erroneous operation of reverse rotation during the rotation process, this type of ignition switch is required to have the function of mutual locking during forward and reverse rotation, so that the two states do not interfere with each other, that is, when the forward operation is turned on, the reverse operation cannot be performed (the reverse operation can only be performed after unlocking), and when the reverse operation is turned on, the forward operation cannot be performed (the forward operation can only be performed after unlocking). However, conventional interlocking switches in the prior art often require complex interlocking mechanisms to achieve interlocking and conduction of the two states, resulting in a complex overall structure of the switch, a high failure rate, and high cost. Therefore, there is an urgent need for an ignition switch with a simple structure, low cost, and good reliability and a forward and reverse interlocking limit function. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned shortcomings and provide an ignition switch with a forward and reverse interlocking limit function which has a simple structure, low cost and good reliability.

[0004] The purpose of the utility model is achieved in this way:

[0005] An ignition switch with forward and reverse interlocking limit function, comprising a base with a plurality of contacts and wiring pieces installed, a sleeve connected to the base, a driving rod with a contact piece rotatably arranged in a cavity formed between the base and the sleeve, when the driving rod rotates left or right, the contact piece contacts the corresponding contacts on the base to conduct different paths;

[0006] A limit seat is embedded in the inner wall of the sleeve, and a rotating body is rotatably arranged in the inner hollow structure of the limit seat. The bottom of the rotating body is movably connected with the driving rod, and the driving rod is controlled to rotate left or right by the rotating body rotating left or right.

[0007] The annular side wall of the limit seat is provided with a first limit groove and a second limit groove with different heights and both in a horizontal state, as well as a notch; the first limit groove and the second limit groove are connected through the notch; a protruding stopper is provided on the side wall of the rotating body; the stopper is movably embedded in the space of the notch, the first limit groove and the second limit groove through the lifting, left rotation and right rotation of the rotating body.

[0008] Furthermore, the base is provided with a bayonet, and the sleeve is provided with a protrusion that cooperates with the bayonet and engages with the bayonet. The base and the sleeve are locked and connected by the bayonet and the protrusion.

[0009] Furthermore, a first wiring piece and a second wiring piece which are riveted and connected to a plurality of contacts are mounted on the base; the first wiring piece and the second wiring piece are both provided with threaded holes for connecting external wires by screws.

[0010] Furthermore, a step that is inclined and gathered inward is provided on the upper part of the inner wall of the sleeve, and a clamping column with a buckle portion is provided on the limit seat; the buckle portion is clamped on the upper step surface of the step to form a clamping connection with the inner wall of the sleeve.

[0011] Furthermore, a square protrusion is provided at the bottom of the rotating body, which is inserted into a square hole provided at the top of the driving rod. The rotating body rotates and drives the driving rod to rotate synchronously.

[0012] Furthermore, the driving rod is provided with an annular groove for embedding a reset spring, and the top of the reset spring abuts against the rotating body, so that the rotating body automatically resets upward.

[0013] Furthermore, the contact piece is installed in the driving rod through the moving contact, the contact spring, the steel ball seat and the steel ball in sequence.

[0014] Furthermore, the rotating body is a lock core with a key, and the rotation operation can only be performed by inserting the key into the lock core.

[0015] Furthermore, the key is provided with a knob-type key cover to facilitate gripping and operation.

[0016] Furthermore, a sealing gasket and a fastening ring are provided on the upper part of the sleeve, and the ignition switch is installed on the equipment operation panel through the cooperation of the sleeve, the sealing gasket and the fastening ring; an O-ring is provided between the bottom of the sleeve and the base.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model arranges a first limit groove and a second limit groove with different heights in the sleeve of the ignition switch, the two are connected through a notch, and a stopper of a rotating body is used to perform a lifting operation in the notch to realize unidirectional sliding into the first limit groove or the second limit groove, thereby realizing the switch on and off in both the forward and reverse directions, and the forward and reverse rotations do not interfere with each other, and the utility model has an interlocking function. The overall structure of the ignition switch is simple, the cost is low, and the reliability is good, and there is no need to additionally arrange a complex interlocking circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is an exploded view of the parts of an ignition switch with forward and reverse interlocking limit function.

[0020] Figure 2 The utility model is a structural schematic diagram of an ignition switch with forward and reverse interlocking limit function.

[0021] Figure 3 The utility model is a cross-sectional view of an ignition switch with forward and reverse interlocking limit function.

[0022] Figure 4 The utility model is a schematic diagram of a limit seat structure of an ignition switch with a forward and reverse interlock limit function.

[0023] Figure 5 The utility model is a front view of a limit seat of an ignition switch with a forward and reverse interlock limit function.

[0024] Figure 6 The utility model is a plan view of a limit seat slide groove of an ignition switch with a forward and reverse interlock limit function.

[0025] Figure 7 The utility model is a top view of a cross-sectional view of an ignition switch with a forward and reverse interlocking limit function in a left-rotation state.

[0026] Figure 8 The utility model is a top view of a right-rotation state of an ignition switch with a forward and reverse interlocking limit function.

[0027] Fig. 9 The utility model is a partial cross-sectional view of an ignition switch with forward and reverse interlocking limit function.

[0028] Fig.10 The utility model discloses an exploded view of a driving rod part of an ignition switch with a forward and reverse interlocking limit function.

[0029] Fig.11 The utility model discloses an exploded view of the base parts of an ignition switch with forward and reverse interlocking limit function.

[0030] in:

[0031] Base 1, sleeve 2, drive rod 3, contact piece 4, limit seat 5, rotating body 6, first limit groove 7, second limit groove 8, notch 9, block 10, bayonet 11, protrusion 12, contact 13, first wiring piece 14, second wiring piece 15, step 16, buckle part 17, clamping column 18, square hole 19, reset spring 20, annular groove 21, moving contact 22, contact spring 23, steel ball seat 24, steel ball 25, key 26, knob key cover 27, sealing gasket 28, fastening ring 29, O-ring 30. DETAILED DESCRIPTION

[0032] See also Figures 1 to 11The utility model relates to an ignition switch with a forward and reverse interlocking limit function, comprising a base 1 on which a plurality of contacts 13 and wiring pieces are installed. The specific number of contacts 13 can be set according to the number of switch paths actually required to be realized by the ignition switch. In this embodiment, a total of seven contacts 13 are provided. The base 1 is provided with a first wiring piece 14 and a second wiring piece 15 which are riveted and connected to the seven contacts 13 respectively; there are five first wiring pieces 14, which are connected and connected to the five contacts 13 respectively, and there is one second wiring piece 15, which is connected and connected to two contacts 13. The first wiring piece 14 and the second wiring piece 15 are both provided with threaded holes for connecting external wires by screws;

[0033] The base 1 is clamped with a sleeve 2, and a driving rod 3 with a contact piece 4 is rotatably arranged in the cavity formed between the base 1 and the sleeve 2. When the driving rod 3 rotates to the left or right, the contact piece 4 follows the rotation and contacts the corresponding contact 13 on the base 1 to connect different paths; an O-ring 30 is arranged between the bottom of the sleeve 2 and the base 1, and an O-ring 30 is arranged between the inner wall of the sleeve 2 and the driving rod 3 to ensure the sealing of the contact switch space and improve the working reliability; a sealing gasket 28 and a fastening ring 29 are arranged on the upper part of the sleeve 2, and the ignition switch is installed on the equipment operation panel through the sleeve 2, the sealing gasket 28 and the fastening ring 29. Specifically, the base 1 is provided with a bayonet 11, and the sleeve 2 is provided with a protrusion 12 that is clamped with the bayonet 11. The base 1 and the sleeve 2 are locked and connected by clamping the bayonet 11 and the protrusion 12. In other embodiments, the base 1 and the sleeve 2 can also be connected by other means, such as bolting, threading, etc.

[0034] A limit seat 5 is embedded in the inner wall of the sleeve 2, and a rotating body 6 is rotatably arranged in the internal hollow structure of the limit seat 5. The bottom of the rotating body 6 is movably connected with the driving rod 3, and the driving rod 3 is controlled to make a corresponding left or right turn by the left or right rotation of the rotating body 6. A step 16 that is inclined and gathered inward is provided on the upper part of the inner wall of the sleeve 2, and a clamping column 18 with a buckle part 17 is provided on the limit seat 5. During assembly, the limit seat 5 is inserted from the bottom through hole of the sleeve 2 and pushed to the top, so that the buckle part 17 is clamped on the upper step surface of the step 16, forming a clamping connection with the inner wall of the sleeve 2, so that the sleeve 2 and the limit seat 5 form an integral component. A square protrusion is provided at the bottom of the rotating body 6, which is inserted into the square hole 19 set at the top of the driving rod 3. The rotation of the rotating body 6 drives the driving rod 3 to rotate synchronously;

[0035] The driving rod 3 is provided with an annular groove 21 for embedding a reset spring 20, and the top of the reset spring 20 abuts against the rotating body 6, so that the rotating body 6 can automatically reset upward after the rotating body 6 is pressed down and released; the contact piece 4 is installed in the driving rod 3 through the moving contact 22, the contact spring 23, the steel ball seat 24 and the steel ball 25 in sequence; the steel ball 25 cooperates with the pit arranged on the inner wall of the sleeve 2 to realize the sound and feel of the feedback required for the switch operation to be in place; the contact spring 23 ensures the contact pressure between the contact piece 4 and the contact 13, and the stable contact between the steel ball 25 and the inner wall of the sleeve 2; when the driving rod 3 rotates with the rotating body 6, the contact piece 4 contacts the corresponding contact 13 on the base 1 to realize the path conduction;

[0036] The rotating body 6 is a lock core with a key 26, and the key 26 must be inserted into the lock core to perform the rotation operation, which can effectively prevent misoperation and improve the safety of the device; a knob-type key cover 27 is provided on the key 26 to facilitate gripping and operation; in other embodiments, the rotating body 6 can be a simple knob-type structure;

[0037] The annular side wall of the limit seat 5 is provided with a first limit groove 7 and a second limit groove 8 of different heights and both in a horizontal state, as well as a notch 9; the first limit groove 7 and the second limit groove 8 are connected through the notch 9; a protruding stopper 10 is provided on the side wall of the rotating body 6; the stopper 10 is movably embedded in the space between the notch 9, the first limit groove 7 and the second limit groove 8 through the lifting, left rotation and right rotation of the rotating body 6. The stopper 10 of the rotating body 6 can be freely lifted and lowered in the notch 9, and the top and bottom of the notch 9 are the upper and lower limits of the lifting and lowering of the stopper 10; when the stopper 10 descends and is located at the bottom of the notch 9, the stopper 10 can only rotate rightward and slide into the second limiting groove 8, and is blocked by the lower side wall of the lower part of the notch 9 and cannot rotate leftward; when the stopper 10 rises and is located at the top of the notch 9, the stopper 10 can only rotate leftward and slide into the first limiting groove 7, and is blocked by the upper side wall of the upper part of the notch 9 and cannot rotate rightward; by the stopper 10 performing lifting and lowering, single left rotation, and single right rotation actions in the limiting seat 5, the left and right rotation operations do not interfere with each other and have an interlocking function, that is, pressing the rotating body 6 can only perform the right rotation operation, and rebounding the rotating body 6 can only perform the left rotation operation;

[0038] When the ignition switch of this embodiment is used as an ignition switch, it is turned left to turn off the flameout, and turned right to turn on the flameout. It can be divided into the following states: before the key 26 is inserted into the lock core of the rotating body 6, it is the initial state. At this time, the block 10 of the lock core of the rotating body 6 is located in the notch 9. Under the elastic reset effect of the reset spring 20, the block 10 is pressed upward against the top of the notch 9. At this time, the lock core is in a locked state and cannot be operated; the key 26 is inserted into the lock core. At this time, the lock core is unlocked, and the lock core of the rotating body 6 can be rotated and pressed by the key 26; the key 26 is pressed downward to make the lock core of the rotating body 6 descend, driving the block 10 to descend to the bottom of the notch 9, and then rotating right , so that the block 10 slides to the right into the second limiting groove 8, at this time the driving rod 3 rotates right along, and the contact piece 4 on the driving rod 3 contacts the right contacts 13 on the base 1 to achieve ignition; after ignition, turn the rotating body 6 lock cylinder to the left and slide it out of the second limiting groove 8, return to the notch 9, release the pressure, the rotating body 6 lock cylinder is reset by the reset spring 20 and rises, the block 10 supports the top of the notch 9 and returns to the initial state; at this time, rotate the rotating body 6 lock cylinder to the left, so that the block 10 slides to the left into the first limiting groove 7, at this time the driving rod 3 rotates left along, and the contact piece 4 on the driving rod 3 contacts the left contacts 13 on the base 1 to achieve flameout. The above-mentioned ignition and flameout operations do not interfere with each other and have an interlocking function.

[0039] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. An ignition switch with forward and reverse interlock limit function, comprising a base (1) on which a plurality of contacts (13) and a wiring piece are mounted, characterized in that: The base (1) is connected to a sleeve (2), and a drive rod (3) with a contact piece (4) is rotatably arranged in a cavity formed between the base (1) and the sleeve (2); when the drive rod (3) rotates leftward or rightward, the contact piece (4) contacts corresponding contacts on the base (1) to connect different paths; A limit seat (5) is embedded in the inner wall of the sleeve (2), and a rotating body (6) is rotatably arranged in the inner hollow structure of the limit seat (5). The bottom of the rotating body (6) is movably connected to the driving rod (3), and the driving rod (3) is controlled to rotate left or right by the rotating body (6) to rotate left or right accordingly; The annular side wall of the limit seat (5) is provided with a first limit groove (7) and a second limit groove (8) of different heights and both in the form of horizontal slide grooves, as well as a notch (9); the first limit groove (7) and the second limit groove (8) are connected via the notch (9); a protruding stopper (10) is provided on the side wall of the rotating body (6); the stopper (10) is movably embedded in the space between the notch (9), the first limit groove (7) and the second limit groove (8) through the lifting, left rotation and right rotation of the rotating body (6).

2. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The base (1) is provided with a bayonet (11), and the sleeve (2) is provided with a protrusion (12) that cooperates with the bayonet (11) for locking. The base (1) and the sleeve (2) are locked and connected by the bayonet (11) and the protrusion (12).

3. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The base (1) is provided with a first wiring piece (14) and a second wiring piece (15) which are riveted and connected to the plurality of contacts (13) respectively; the first wiring piece (14) and the second wiring piece (15) are both provided with threaded holes for connecting external wires via screws.

4. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The upper part of the inner wall of the sleeve (2) is provided with a step (16) that is inclined and gathered inwardly, and the limit seat (5) is provided with a clamping column (18) with a clamping portion (17); the clamping portion (17) is clamped on the upper step surface of the step (16) to form a clamping connection with the inner wall of the sleeve (2).

5. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The bottom of the rotating body (6) is provided with a square protrusion which is inserted into a square hole (19) provided at the top of the driving rod (3). The rotating body (6) rotates and drives the driving rod (3) to rotate synchronously.

6. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The driving rod (3) is provided with an annular groove (21) in which a return spring (20) is embedded. The top of the return spring (20) abuts against the rotating body (6), so that the rotating body (6) automatically returns to its original position upward.

7. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The contact piece (4) is installed in the driving rod (3) via the moving contact (22), the contact spring (23), the steel ball seat (24) and the steel ball (25) in sequence.

8. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: The rotating body (6) is a lock core with a key (26), and the rotation operation can only be performed when the key (26) is inserted into the lock core.

9. The ignition switch with forward and reverse interlock limit function according to claim 8, characterized in that: The key (26) is provided with a knob-type key cover (27) for easy grasping and operation.

10. The ignition switch with forward and reverse interlock limit function according to claim 1, characterized in that: A sealing gasket (28) and a fastening ring (29) are provided on the upper portion of the sleeve (2); the ignition switch is mounted on the equipment operation panel by means of the sleeve (2), the sealing gasket (28) and the fastening ring (29); and an O-ring (30) is provided between the bottom of the sleeve (2) and the base (1).

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