JPH07247868A - Cable type transmitter - Google Patents

Abstract

PURPOSE:To improve precision and to reduce size, in a transmitter to convert forced pull operation of an operation member into an electric signal. CONSTITUTION:The inner cable 20 of a forced pull control cable 13 forcibly pulled by an operation rod comprises a core, a lateral line, and resin coat. The inner cable 20 is wound around the outer periphery of a pulley 3 rotatably arranged in cases 1 and 2, and the end part thereof is locked. The detecting shaft 19 of a potentiometer P is fixed to the central part of the pulley 3. Thus, since the pulley 3 is rotated approximately in a 270 deg. arc, the detecting angle range of the potentiometer P is sufficiently utilized, and high resolution detection is practicable. Further, since linear movement of the pulley 3 is converted into rotational movement of a detecting shaft by the pulley 3, the size of a case is sharply reduced compared with a conventional transmitter using a lever.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cable type transmitter. More specifically, the invention relates to a cable-type transmitter for converting an operation amount of a lever in a manual operation box into an electric signal, which is used for electrically and remotely controlling an engine and a clutch of a small boat or the like.

[0002]

2. Description of the Related Art A conventional transmitter of this type, as shown in FIG. 9, has a potentiometer P fixed to a case 101.
And a lever 103 fixed to the rotary shaft 102 of the potentiometer P and an inner cable 105 of a push / pull control cable 104 connected to the lever 103. The inner cable 105 is guided by the conduit 106 and is provided in the steering room or the like in the manual operation box 10.
It is connected to 7. A swing arm 109 is fixed to a base portion of a manual lever 108 of the manual operation box 107, and an upper end of a rod 110 provided at a lower portion of the manual operation box 107 is rotatable at an end portion of the swing arm 109. The inner cable 105 of the push-pull control cable 104 is connected to the lower end of the rod 110. The electric output of potentiometer P is controller 1
It is sent to a motor-driven actuator 112 via 11, and the actuator 112 operates a throttle lever or the like of the engine 113. Thereby, as a whole, a remote control system is constructed which uses the manual lever 108 of the manual operation box 107 as an input means and outputs the engine speed and the like. In addition, instead of the potentiometer P, which is a rotation angle detector, a detector that converts a linear reciprocating motion into a voltage signal may be used (see Japanese Patent Application No. 3-249339 and Japanese Patent Application Laid-Open No. 5-280386).

[0003]

In the above-mentioned conventional oscillator, since the push / pull operation of the push / pull control cable 104 is converted into the rotary operation of the rotary shaft 102 by the lever 103, the rotation angle of the rotary shaft 102 is changed. It is relatively narrow, around 90 °. As a result, the width of the output voltage is narrowed, so that the resolution of the detector is coarse and it is difficult to control the engine in detail. Therefore, particularly in the case of a gasoline engine, an accident may occur due to a sudden increase in the engine speed with a small cable stroke and a sudden start. Further, it is necessary to lengthen the lever 103 to some extent in relation to the operation stroke and the operation force of the push-pull control cable 104, so that the case 101 becomes relatively large and the manufacturing cost becomes high.

The inner cable 105 of the push-pull control cable 104 used in the conventional transmitter is shown in FIG.
As shown in FIGS. 10A and 10B, since the wire is made of a single steel wire, the allowable bending radius is large, which is also the case 101.
It is the cause that cannot be made smaller. The present invention solves the problem of the conventional oscillator, has high resolution,
Therefore, it is a technical issue to provide a new transmitter that enables fine engine control and does not cause an accident such as a sudden start even in the case of a gasoline engine. Further, the present invention is
It is an object to provide a small-sized oscillator with low manufacturing cost.

[0005]

A cable type transmitter according to the present invention comprises a rotation angle detector, a pulley fixed to the input shaft of the rotation angle detector, and one end of which is locked to the pulley. It is characterized in that it comprises an inner cable wound around the pulley and capable of push-pull operation, and an operating member connected to the other end of the inner cable.

Further, when the oscillator of the present invention is used as an oscillator for converting the operation amount of the operating rod that reciprocates while swinging into an electric signal, the operating rod and the end portion side of the operating rod are guided. A guide pipe, a conduit fixed to one end of the guide pipe, a case fixed to the other end of the conduit, and a detection shaft fixed to the case and rotatably accommodated in the case. A rotation angle detector, a pulley fixed to the detection shaft of the rotation angle detector, one end of which is locked to the pulley, is wound around the pulley and passes through the conduit, and the end of the operation rod. The inner cable of the push-pull control cable connected to the section.

The inner cable has a core wire made of a metal wire,
It is preferable that a group of side lines that are arranged so as to surround the core line and a buckling-preventing synthetic resin coat that is provided around the side line group are provided. Further, in the case of engine throttle control, the rotation angle detector can be a potentiometer. Further, in the case of clutch control for switching between forward movement, neutral movement, and reverse movement, the rotation angle detector can be composed of a cam fixed to the detection shaft and a switch which is on / off controlled by the cam. .

[0008]

In the cable type oscillator according to the first aspect of the present invention,
When the inner member is pushed and pulled by operating the operation member, the pulley reciprocates and the detection shaft of the rotation angle detector to which the pulley is fixed rotates. Therefore, the operation amount or the operation position of the operation member can be taken out as an electric signal. The ratio between the operation amount of the operation member and the rotation angle of the detection shaft can be freely changed by setting the diameter of the pulley. Therefore, if the pulley is made smaller, the rotation angle with respect to the operation amount becomes larger, and the stroke of the operation member can be set within the rotatable range of the detection shaft, for example, 270 to 360 °. Therefore, resolution or detection accuracy is improved and fine control becomes possible. Further, since the operation amount of the operation member and the rotation angle of the detection shaft maintain a substantially proportional relationship, accurate control is possible as compared with the case of nonlinear conversion such as when using a lever.

In the cable transmitter according to the second aspect of the present invention, when the operating rod is pushed and pulled along the guide pipe, the inner cable connected to the end of the operating rod,
It is pushed and pulled in the same direction while being guided by a continuous passage from the guide pipe to the conduit. After that, the same action as that of the transmitter of the first aspect is exhibited, and the pulley is reciprocally driven to rotate the detection shaft.

The inner cable for pushing and pulling is provided around the side cable group, and an inner cable for pulling control cable composed of a core wire made of a metal wire and a side wire group attached so as to surround the core wire. When it is composed of a synthetic resin coat for buckling prevention, it has the same bending flexibility as the inner cable of the pull control cable, so even if the radius of the pulley, that is, the curvature radius of bending, is reduced, Tingling) does not occur. Moreover, since the resin coating improves the buckling resistance and reduces the frictional resistance, the buckling does not occur even if the pushing operation is performed with a considerable operating force. Therefore, the radius of the pulley can be further reduced, the resolution or detection accuracy can be significantly increased, and the size of the case can be made much smaller than that of a conventional oscillator using a lever.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cable type oscillator of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional front view of a main part showing an embodiment of a transmitter of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a perspective view showing a state before assembly of the transmitter of FIG. FIG. 4 is a front view showing the whole of the transmitter, FIGS. 5a and 5b are side views and cross-sectional views showing an embodiment of the inner cable used in the transmitter of the present invention, and FIG. 6 is the transmitter of FIG. 7 is an operation system diagram showing an example of an engine remote control system equipped with a pressure device, FIG. 7 is a partially cutaway front view showing another embodiment of the oscillator of the invention, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. Is.

In FIG. 1, reference numerals 1 and 2 respectively denote a main body and a lid of a case of the transmitter A, which together form a case for rotatably housing the pulley 3. As shown in FIG. 2, the main body 1 is a relatively flat member, and the lid 2 is provided with a recess 4 for accommodating the pulley 3. Holes 6 and 7 for rotatably supporting the boss portion 5 of the pulley 3 are formed in the central portions of the main body 1 and the lid body 2, respectively. Further, as shown in FIG. 3, on the inner surface of the main body 1,
A groove 9 for receiving a fan-shaped stopper (reference numeral 8 in FIG. 2) projecting on the lower surface of the pulley 3 and allowing the pulley 3 to reciprocate within a predetermined angle range is formed in a fan-shaped shape around the hole 6. There is. The both ends of the groove 9 are the portions with which the stopper 8 abuts. Further, a plurality of holes 11 for passing the tapping screw 10 are formed in the lid body 2, and a prepared hole 12 for screwing the tapping screw 10 is formed in the main body 1. Grooves 15 and 16 for fixing the conduit 14 of the push-pull control cable 13 are provided in the upper left corners of the main body 1 and the lid body 2.

As shown in detail in FIG. 2, the lid 2 is provided with two protrusions 17, 17, and push-in nuts 18, 18 for mounting the potentiometer P are fitted on the protrusions 17, respectively. There is. The boss portion 5 of the pulley 3 is fixed to the detection shaft 19 of the potentiometer P. A guide groove 21 for guiding the inner cable 20 of the push-pull control cable 13 is formed around the pulley 3, and further, as shown in FIG. 1, a locking member 22 fixed to the end portion of the inner cable 20 is provided. A locking groove 23 for locking is provided. Reference numerals 24 and 25 in FIG. 2 are projections and holes for aligning the main body 1 and the lid body 2, and reference numerals 26 and 27 in FIG. 1 are for aligning the initial position of the pulley 3 with the lid body 2, respectively. It is a match mark. The main body 1 is preferably integrally molded from a synthetic resin having good slipperiness such as polyamide resin so as to reduce the frictional resistance of rotation of the pulley 3, and the lid 2 and the pulley 3 are made of synthetic material such as polyacetal having high strength. It is preferably composed of a resin.

FIG. 4 shows the entire transmitter A described above. An operation rod 28 is connected to the end of the inner cable 20, and a guide pipe 29 that slidably supports the operation rod 28 is connected to the end of the conduit 14. The conduit 14 is crimped to a thin tubular portion 31a at one end of a tubular mounting member 31 having a mounting groove 30, and the end of the guide pipe 29 is attached to a socket portion 32 provided at the other end of the mounting member 31. The spherical portion 33 formed on the portion is swingably connected. The operation rod 28 and the guide pipe 29 may be the same as those conventionally known. A mounting member 35 provided with a mounting groove 34 at the other end of the conduit 14.
The thin tubular portion 35a is crimped. The attachment member 35 is sandwiched and fixed by the main body 1 and the lid body 2 of the case described above while being locked in the grooves 15 and 16 provided therein. In FIG. 4, the spherical portion 33 of the guide pipe 29 may be directly supported by the case body 1 and the lid body 2 without swinging the conduit 14 therebetween. However, it is preferable to provide the conduit 14, which has the advantage that the mounting position and orientation of the case can be freely selected. The length of the conduit 14 is not particularly limited, but if the stroke of the operating rod 28 is 100 mm, the length of the conduit 14 is, for example, about 100 mm. Reference P in FIG.
Reference numeral 1 is a signal line for taking out the output signal of the potentiometer P, and P2 is a connector of these signal lines P1.

FIGS. 5a and 5b show a preferred embodiment of the inner cable 20, which comprises a central core wire 36 and a plurality of lateral wires 37 arranged around it in a loose spiral. And a synthetic resin coat 38 provided on the outer periphery of the side line 37. Since this is excellent in flexibility, it is possible to reduce the radius of curvature and make it as small as the inner cable of the control cable. Moreover, since the side line 37 and the resin coat 38 can prevent buckling, the pushing operation can be sufficiently endured. Inner rope 20
When the diameter of the core wire is 1.5 to 2.5 mm, the core wire 36
Is a steel wire having a diameter of 0.2 to 0.5 mm, the side wire 37 is eight steel wires having a diameter of 0.2 to 0.4 mm, and the outer diameter of the resin coat 38 is the diameter of the inner cord 20. Further, the resin coat 38
Polyamide resin, fluororesin, polyethylene, polyacetal and the like are preferable as the material.

In the transmitter A constructed as described above, when the operating rod 28 shown in FIG. 4 is pushed and pulled in the directions of arrows S1-S2, the inner cable 20 slides in the same direction. Along with that, the pulley 3 rotates in the directions of arrows S3 to S4, and the detection shaft 19 of the potentiometer P rotates in the same direction. At this time, the pulley 3 rotates about 270 ° within the range of the fan-shaped groove (9 in FIG. 3) of the stopper 8 in FIG. Therefore, the detection axis of the potentiometer P can effectively use the entire range of voltage that can be detected.

FIG. 6 shows a marine engine remote control system B which employs the transmitter A. Reference numeral 40 in FIG. 6 is a manual operation box, and a manual lever 41 is rotatably provided on the manual operation box 40 by a shaft 42. A swing arm 43 is fixed to the shaft 42, and the operation rod 28 described above is attached to the end of the swing arm 43.
Are connected. The attachment member 31 to which one end of the guide pipe 29 is attached is attached to the lower end of the manual operation box 40. The output signal of the potentiometer P is sent to the controller 45 via the signal line 44.
Is transmitted to the actuator 48 in the vicinity of the engine 47 via the signal line 46 after being processed by the controller 45 such as amplification. Based on a signal from the controller 45, the actuator 48 rotates the motor by a predetermined number of revolutions, and opens / closes the throttle lever of the engine 47 via a speed reducer and a drive cable. According to such a system B, the engine output can be remotely controlled according to the swinging operation of the manual lever 41. Further, since the transmitter A and the controller 45 are connected to each other and the controller 45 and the actuator 48 are connected to each other by the signal lines 44 and 46, even if they are separated from each other, mechanical loss such as friction resistance is caused. There is no need for efficient remote control. Reference numeral 49 in FIG. 6 is a battery for the power supply of the controller 45.

7 and 8 show a cam 51 connected by a detection shaft 50 so as to rotate together with the pulley 3 in place of the potentiometer P, and a pair of microswitches 52 which can be turned on and off by the cam 51. 53 shows a transmitter C which employs an angle detector consisting of 53 and 53. The cam 51 has levers 54, 55 of any of the microswitches 52, 53 to some extent including the neutral position N.
When the detection shaft 50 rotates in the direction of arrow F by a predetermined angle or more without pressing, the lever 54 of one microswitch 52
Is pressed to turn it on, and when it has rotated in the opposite direction (arrow R direction) by a predetermined angle or more, the lever 55 of the other micro switch 53 is pressed to turn it on. Therefore, this transmitter C
For example, if the inner rope 20 is connected to the operation rod 28 of the manual operation box 40 of FIG. 6, at the center position N of the manual lever 41, the clutch of the ship is operated to the “neutral” state, and either of the manual levers 41 is operated. It can be used for a clutch operation transmitter for switching between "forward" and "reverse" in accordance with the turning operation in the direction.

The cam 51 and the micro switch 5
Instead of the combination of 2 and 53, a combination with another switch such as a photomicrosensor or a magnetoresistive element for detecting the angle of a cam (including a perforated disk) may be used. Further, the transmitter A of FIG. 1 and the transmitter C of FIG. 7 may be combined so that the throttle operation and the clutch operation are performed by one inner cable. In that case,
The controller 45 determines whether the voltage is positive or negative with respect to the reference voltage, and if the voltage is within a predetermined absolute value, the clutch operation is performed according to plus or minus, and if the voltage is a positive or negative voltage higher than that. For example, the throttle should be opened gradually. With such a configuration, it is possible to electrically perform clutch operation and throttle operation with a single manual lever.

[0020]

In the transmitter of the present invention, the straight-line reciprocating motion of the inner cable of the push-pull control cable is converted into the rotary motion by the pulley. Therefore, the operating angle of the detection shaft can be increased as compared with the case of using the lever. It is possible to increase the resolution, and thus the resolution is increased and fine control is possible. In addition, the size of the case can be made much smaller than that of the conventional oscillator. Therefore, the mounting position can be easily designed, and mass production can be performed at low cost.

[Brief description of drawings]

FIG. 1 is a sectional front view of a main part showing an embodiment of a transmitter of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a perspective view showing a state before assembly of the transmitter of FIG. 1. FIG.

4 is a front view showing the entire transmitter of FIG. 1. FIG.

5a and 5b are a side view and a cross-sectional view, respectively, showing an embodiment of an inner cable used in the oscillator of the present invention.

6 is an operation system diagram showing an example of an engine remote control system including the oscillator of FIG.

FIG. 7 is a partially cutaway front view showing another embodiment of the oscillator of the invention.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is an operation system diagram showing an example of an engine remote control system including a conventional oscillator.

10a and 10b are a side view and a cross-sectional view showing an example of an inner cable used for a conventional oscillator, respectively.

[Explanation of symbols]

 A Transmitter 1 Main body 2 Lid body 3 Pulley 13 Push-pull control cable 14 Conduit 19 Detecting shaft 20 Inner cable 28 Operation rod 29 Guide pipe P Potentiometer B Marine engine remote control system 45 Controller 47 Engine 48 Actuator 50 Detecting shaft 51 Cam 52 Micro Switch 53 Micro Switch C Transmitter

Claims (5)

[Claims] 1. A rotation angle detector, a pulley fixed to an input shaft of the rotation angle detector, one end of which is locked to the pulley, and a push-pull operation unit which is wound around the pulley. A cable-type transmitter including a rope and an operation member connected to the other end of the inner rope. 2. A transmitter for converting an operation amount of an operating rod, which reciprocates while swinging, into an electric signal, the operating rod, a guide pipe for guiding an end side of the operating rod, and the guide pipe. A conduit fixed to one end of the conduit, a case fixed to the other end of the conduit, a rotation angle detector fixed to the case, and a rotation angle detector rotatably accommodated in the case. Of the push-pull control cable connected to the end of the operating rod, which is wound around the pulley and is connected to the end of the operating rod, the pulley being fixed to the detection shaft of Cable type transmitter consisting of rope. 3. The inner cord comprises a core wire made of a metal wire, a group of side wires attached so as to surround the core wire, and a buckling-preventing synthetic resin coat provided around the side wire group. A cable type transmitter according to item 1 or 2. 4. The cable type oscillator according to claim 1, 2 or 3, wherein the rotation angle detector is a potentiometer. 5. The cable type oscillator according to claim 1, 2 or 3, wherein the rotation angle detector comprises a cam fixed to a detection shaft and a switch which is on / off controlled by the cam.