JPS5823004Y2 - Lock mechanism in starting device of small internal combustion engine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking mechanism in a starting device for a small internal combustion engine such as an outboard motor.

In general, a recoil starter used in a starting device is equipped with a rope that can be freely drawn out and wound up, and a series of mechanisms such as a reel driven by a mainspring and a clutch book that can be retracted and retracted via a restraining plate are housed in a case, and the starter is started. The pulley is connected to the flywheel side of the crankshaft to start the engine.

Currently, starter devices for outboard motors allow the engine to operate even when the shift lever is in the forward or reverse position.

Therefore, if the 1-inch recoil starter is started with the shift lever in the forward or reverse position by mistake, an unexpected failure may occur.

The present invention eliminates these conventional drawbacks and starts the engine by locking the rotation of the coil starter reel in a state other than neutral by utilizing the operation of the shift lever installed on the outboard motor, etc. This is to prevent a sudden start immediately afterward.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of the main parts of the locking mechanism showing an embodiment of the locking mechanism in the starter device of the present invention, and FIG.

In the figure, reference numeral 1 denotes an operation plate with a cam surface connected to one end 2a of a pull wire (inner wire) 2 attached to a shift lever (not shown) and rotatably attached to a starter case 3. A return spring 4 is installed between the case 3 and the case 3 so that the operation plate 1 always rotates in a fixed direction, that is, clockwise in the figure.

That is, one end of the return spring 4 is fixed to the operation plate 1, and the other end is fixed to the case 3 (see FIG. 2).

On the other hand, a stopper 5 is rotatably attached to the same case 3, and a return spring 6 is inserted so as to always act counterclockwise.

In the figure, one end of the return spring 6 is fixed to the stopper 5, and the other end is fixed to the case 3 (see FIG. 2).

The tip thereof faces a groove 5, which will be described later.

Although a link mechanism of a part of the shift lever is not shown, it is set so that the wire 2 is pulled when the shift lever is in the neutral position, and the wire 2 is returned when the shift lever is in the forward or backward position.

Incidentally, ratchet gears 7a are integrally provided at several locations on the outer periphery of the reel 7 so as to prevent rotation by the swinging of the stopper 5.

Next, the operation of the locking mechanism configured in this way will be explained.

First, when the shift lever is in the neutral position, the operation plate 1
is in the position shown by the dashed-dotted line in FIG. 1, and the stopper 5 is pushed up against the return spring 6 by the cam surface of the operating plate 1, and is in the same position as shown by the dashed-dotted line.

When the shift lever is moved forward or backward from this state, the wire 2 is returned, and at the same time, the operation plate 1 is rotated clockwise with the action of the return spring 4.

When the operating plate 1 rotates, the stopper 5 is also released, and the cam surface of the operating plate 1 causes the return spring 6 to swing counterclockwise, engaging with the ratchet gear 7a provided on the outer periphery of the reel 7, and locking the reel 7. As a result, the rope 8 (see Figure 2) cannot be pulled out.

As shown in Fig. 3, if the top of the ratchet gear 6a of one reel 6 obstructs the operation of the stopper 5 when switching from neutral to forward or backward, as shown by the solid line, When the rope 8 is pulled a little, the reel 7 rotates and the interfering tooth passes, and the spring 6 operates so that the stopper 5 is in the state shown by the chain line when the next tooth arrives.

As explained above, according to the present invention, even if the shift lever is in a position other than neutral and an attempt is made to start the coil starter, the reel of the recoil starter is locked, thus preventing the engine from suddenly starting immediately after starting, unlike conventional methods. This ensures safe driving.

[Brief explanation of drawings]

FIG. 1 is a plan view of a main part showing an embodiment of the locking mechanism in the starter device of the present invention, FIG. 2 is a cross-sectional view taken along the line -■ in FIG. 1, and FIG. 3 is an explanatory diagram of its operation. DESCRIPTION OF SYMBOLS 1... Operation board, 2... Wire, 3... Starter case, 5... Stopper, 4, 6... Return spring, 7... Reel, 8... Rope.

Claims (1)

[Scope of utility model registration request] Interlocking with the pull wire 2 attached to the shift lever,
An operation plate 1 which has a cam surface rotatably attached to the case 3 of the recoil starter and is energized by a return spring 4 built in between the case 3 and the case 3 in one direction, and the case 3 of the recoil starter. A stopper 5 is rotatably attached to the cam surface and biased in the other direction by a return spring 6 so as to come into contact with the cam surface, and a ratchet gear 7a is provided integrally with the reel 7 at several locations on the outer periphery of the reel. Towards a starting device for a small internal combustion engine, which is provided with a shift lever, in which a stopper is engaged with a ratchet gear when the shift lever is in a forward or backward position by rotation of an operation plate 1, and the stopper is opened by the ratchet gear when the shift lever is in a neutral position. Locking mechanism.