JPH0422048Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a throttle lever device for an engine, and in particular, a throttle lever device for an engine that allows lever operation at the time of starting the throttle lever to be performed with a single touch. It is related to.

[Prior art and its problems]

In general, for starting engines such as brush cutters using small engines, a string start type or recoil starter type is often used, and the throttle lever is pulled to the idling state by a governor spring or return spring. This is the reality.

Therefore, when starting the engine, the throttle lever is pulled to increase the engine throttle opening to make it easier to start, but it is extremely difficult to pull the starter grip while the throttle lever is still being pulled by the handle. .

Therefore, various models with stopper devices have been developed that pull and hold the throttle lever to a predetermined position when starting the engine, but all of these devices do not have a stopper to hold the throttle lever. Furthermore, it is necessary to rotate the throttle lever to the optimum position for starting each time, and the operation is complicated and requires a large number of parts, making it difficult to assemble and resulting in high cost.

[Means for solving problems]

The throttle lever is hinged so that it can be rotated by a predetermined angle, and a push button is attached by providing a through hole at a predetermined position of the stay that is held, and an inclined surface is formed at the tip of the push button, and when the push button is retracted, the above The inclined surface presses the throttle lever to rotate it at a predetermined angle and maintain the rotational state, and the rotation operation of the throttle lever causes the push button to maintain the rotational state of the throttle lever at a predetermined angle. Configure it so that it is released.

〔Example〕

Figure 1 a, b, Figure 2, Figure 3 a, b, and Figure 4.
Figures a and b are diagrams for explaining one embodiment of a throttle lever device for an engine according to this invention.

First, as shown in FIGS. 1a and 1b, the throttle lever device is firmly attached to a handle pipe 1 of a brush cutter or the like via a stay 2, for example. 3
A throttle lever is hinged to the stay 2 so as to be rotatable at a predetermined angle. 4
5 is a hinge pin, 5 is a button for starting the engine (not shown), 6 is a push button for rotating and setting the throttle lever 3 to the engine starting position with one touch, and 7 is a throttle opening adjustment provided by the engine. 8 is a terminal commonly called a tycoon attached to the tip of the Bowden wire.

By the way, the throttle lever 3 shown in FIG.
The changes in A indicate the state in which the Bowden wire 7 is connected to the throttle lever 3, that is, the terminal 8 (tyco) is locked in the throttle lever 3, and the B position indicates the state in which the throttle lever 3 starts to be pulled. , C position indicates the engine idling state of the throttle lever 3, that is, the rotating state by the pushbutton 6, and D position indicates the state where the throttle lever 3 is pulled to the maximum and the engine throttle is opened to the maximum degree. This is what is shown.

FIG. 2 shows the configuration of the throttle lever 3, where 3a is a hinge pin 4 insertion hole, and 3b is a hinge pin 4 insertion hole.
3c is a terminal locking groove, and 3c is a hole into which the tip of the push button 6 is fitted.

By the way, the hole 3c into which the tip of the push button 6 fits is formed when the throttle lever 3 is in the position B shown in FIG. 1a, that is, in the position where the throttle lever 3 is not fully operated. The tip of the pushbutton 6 is processed to be positioned slightly inside the edge of the hole 3c.

3a and 3b show the structure of the push button 6 and the structure attached to the stay 2. FIG.

The push button 6 consists of a slide part 6a, a spring 6b attached to the outer periphery of the slide part 6a, and a cap 6c fitted to the rear end of the slide part 6a, and these three parts are shown in FIG. 3b. It is attached to the through hole 2a provided in the stay 2 in a similar manner.

By the way, the tip end 6a' of the slide part 6a is formed with a truncated conical inclined surface, and the rear end 6a'' is machined into a substantially U-shape so as to obtain elastic force of the member, and has two claws X. , Y. On the other hand, the cap 6c has holes 6c' and 6c'' into which the two claws X and Y engage, respectively, when the rear end 6a'' of the slide portion 6a is fitted. It is provided.

Then, the push button 6 described above is assembled in sequence as shown at the same time b.

First, at the beginning of assembly, the claws X and Y located at the rear end 6a'' of the slide portion 6a are compressed against elasticity and fitted into the through hole 2a of the stay 2, as shown in the figure. Proceed further and set as shown in the figure.

Then, the spring 6b is inserted into the through hole 2a and placed around the outer periphery of the slide portion 6a.

Finally, the configuration of the push button 6 is completed by fitting the cap 6c onto the rear end 6a'' of the slide portion 6a.

In order to fit the cap 6c into the rear end 6a'' of the slide portion 6a, as shown in the figure, press and retract the claws X and Y in the same manner as when they were first fitted into the through hole 2a, and then insert the cap 6c into the cap 6c. In this state, push the claws X and Y further into the holes 6c' and 6 provided in the cap 6c.
c'' and fit it in. Holes 6c' of claws X and Y,
6c'' is made by the elastic force of the claws X and Y themselves.

The figure shows the completed state of the push button 6 attached to the through hole 2a of the stay 2.

FIGS. 4a and 4b show the configuration of the throttle lever 3 attached to the stay 2 and the push button 6 and their operational relationship.

The push button 6 shown in FIG.
is arranged so that the inclined surface of the tip 6a' faces the edge of the hole 3c provided in the throttle lever 3, and when the push button 6 is pressed, the inclined surface of the tip 6a' slides and opens the hole 3c. By pushing the edge, for example, the throttle lever 3, which is indicated by the chain double-dashed line in the figure, is rotated to the state shown by the solid line.

That is, the rotation of the throttle lever 3 is exactly at the optimal throttle opening position when the engine is started.

Note that the tip 6a' of the push button 6 set in the above state is connected to the throttle lever 3 as shown in FIG.
It is configured so that it does not completely pass through the hole 3c, hook the stepped portion Z on the edge of the hole, and return to its original state, that is, the state before being pushed. Therefore, the rotational state of the throttle lever 3 when activated by the push button 6 is maintained.

On the other hand, the rotational state of the throttle lever 3 at the time of activation is released by further rotating the throttle lever 3 counterclockwise from the position shown by the solid line a in FIG.

That is, when the throttle lever 3 is rotated counterclockwise, the hole 3c is also rotated counterclockwise, so that the tip 6 of the push button 6 described above
Since the stepped portion Z of a' separates from the edge of the hole 3c and is disengaged, the push button 6 returns to its original position, that is, the state before being pushed, by the spring 6b. Therefore, the throttle lever 3 is in a completely free state, and when it is released from the hand grip, it is rotated clockwise by the spring 9 shown in FIG. The state will be restored to the state before locking as shown in FIG.

The throttle lever device in the engine configured as described above has a button 6 that rotates and locks the throttle lever 3 by a predetermined angle when the throttle lever 3 is started.
Since the engine can be started with a single touch, the engine can be started with a single touch, making it extremely easy to handle.

In addition, the pushbutton 6 for locking has an extremely simple structure consisting of a slide portion 6a, a spring 6b, and a cap 6c, so it not only has a small number of parts but also is extremely easy to assemble and is inexpensive. Become something.

Furthermore, since the lock can be released by an extremely simple operation of just pulling the throttle lever 3, no operation is required to release the lock, and this point is also a feature not found in conventional devices.

[Effect of idea]

As described in detail above, this idea hinges the throttle lever so that it can rotate at a predetermined angle, a through hole is provided at a predetermined position in the retained stay, a push button is attached, and the tip of the push button has an inclined surface. When the pushbutton is retracted, the inclined surface presses the throttle lever to rotate it by a predetermined angle and maintain the rotational state. Since the throttle lever is configured to release the state of rotation at a predetermined angle, the throttle lever can be rotated at a predetermined angle and locked when starting the engine with a single touch of the push button. It is also possible to release the lock without requiring any operation.

Further, the push button itself has an extremely simple structure, is easy to assemble, and has a small number of parts, so it is inexpensive in terms of cost.

[Brief explanation of drawings]

Figure 1 a, b, Figure 2, Figure 3 a, b, and Figure 4.
Figures a and b show one embodiment of the throttle lever device for an engine according to this invention.
Figures a and b are illustrations of the overall installation state, Figure 2 is a plan view of the throttle lever, Figures 3 a and b are illustrations of the structure of the push button and its assembly process, and Figures 4 a and b are illustrations of the throttle lever. It is an explanatory diagram of the relationship between a lever and a push button. 2... Stay, 2a... Through hole, 3... Throttle lever, 3c... Hole, 4... Hinge pin, 6...
...Push button, 6a...Slide part, 6b...Spring, 6c...Cap.

Claims (1)

[Scope of utility model registration request] In a throttle lever device that locks a throttle wire that adjusts the throttle opening of an engine, the throttle lever is hinged so as to be rotatable by a predetermined angle, and a through hole is provided at a predetermined position of the retained stay and a push button is attached. An inclined surface is formed at the tip of the push button, and when the push button is retracted, the inclined surface presses the throttle lever to rotate it by a predetermined angle and maintain the rotated state, and also to rotate the throttle lever by a predetermined angle. 1. A throttle lever device for an engine, characterized in that the push button releases the throttle lever from being held in a predetermined angle rotation state by a rotation operation.