JPS63143344A - Throttle valve switch - Google Patents

Abstract

PURPOSE:To make idle time and full accelerator time detectable each, by installing a detected subject at the tip side of a rotating arm to rotate together with a throttle valve, and constituting this detected subject to be detected by a pair of noncontact type sensor installed in Y terminal member. CONSTITUTION:A pair of mounting parts 21A is projectingly installed at both sides of a base 21 to be attached to the vehicle side, and a cylindrical ring 3 is solidly formed in the center of this base 21. A turning shaft 4 having a rotating arm 4B being rotated by a valve shaft of a throttle valve is fitted in this ring 3 free of rotation. And, on the base 21, a turning plate 22 is rotatably set up at the outer circumferential side of the ring 4, and this plate is rotated by the ring 4 through a pair of engaging projections 22B to be engaged with the rotating arm 4B. In addition, a pair of noncontact type sensors 25 locked to a Y terminal member 26 is installed in making them correspond to each specified position on the turning plate 22, making these sensors detect a fact that the detected subject 24 locked to the engaging projection 22B is situated in and around positions A1 and A2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a throttle valve switch suitably used in, for example, an automobile equipped with an electronically controlled fuel injection device. This invention relates to a throttle valve switch that can simplify the operation and improve reliability.

[Conventional technology]

Generally, in automatic vehicle closing systems equipped with electronically controlled fuel injection devices, the throttle valve switch detects when the throttle valve is open (at idle) and when the valve is opened beyond a predetermined level (at full acceleration). Various fuel injection controls are performed by inputting information to the control unit.

Therefore, FIG. 4 shows a throttle valve switch according to the prior art.

In the figure, reference numeral 1 indicates a base that constitutes the main body of the throttle valve switch together with a cover (not shown).The base 1 is formed of a metal plate or the like, and has a pair of mounting parts IA, IA protruding from both sides. There is. Reference numeral 2 denotes a male connector fixed to one end of the base 1. In the male connector 2, for example, three terminal pins (not shown) are implanted. It is designed to be connected to a mating female connector (not shown) through the connector. Also,
On the rear end side of the male connector 2, terminal brackets (2A, 2B, 2G) extending integrally from each terminal pin are arranged in a row. -2A, 2B, and 2C are respectively attached with springs 8, 9, and 10, which will be described later. Terminal brackets 2A and 2C located on both sides extend slenderly onto a cam plate 5, which will be described later, to restrict inward displacement of each spring 8.9.

Reference numeral 3 indicates a cylindrical ring that serves as a bearing part that is integrally provided in the center of the base 1, and 4 indicates a rotation shaft that is rotatably provided within the ring 3. A fitting hole 4A having a figure 9-shaped surface is formed, and one end of a valve shaft (none of which is shown) of a throttle valve is fitted into the fitting hole 4A. Further, an arm 4B projecting outward in the radial direction is integrally provided on the rotation shaft 4, and the arm 4B is engaged between respective engagement protrusions 5B of a cam plate 5, which will be described later. The rotation shaft 4 is rotated by the valve shaft of the throttle valve, and the cam plate 5 is rotated together via the arm 4B.

Reference numeral 5 denotes a cam plate located on the base 1 and rotatably disposed on the outer circumferential side of the ring 4. The cam plate 5 is formed of a resin material or the like into a substantially disk shape, and has a central portion thereof. is ring 4
A circular sliding hole 5A is provided on the outer circumferential side of the holder so as to be slidable therein. Further, on the cam plate 5, a pair of retaining protrusions 5B, 5B are formed with a predetermined dimension in the circumferential direction and extend in the radial direction.
are erected, and the arm 4B of the rotation shaft 4 is engaged between each of the engagement protrusions 5B. When the cam plate 5 rotates the throttle valve by depressing an accelerator (none of which is shown) provided in the driver's cab of the vehicle, the cam plate 5 rotates the throttle valve via the valve shaft of the throttle valve. , so that it is rotated together with the rotation axis 4.

6.7 indicates cam grooves formed on the cam plate 5, each having a predetermined arc shape, and the cam grooves 6.7 are formed with a predetermined width dimension in order to guide each guide pin 11, which will be described later. It is roughly composed of cam grooves 6A and 7A for closing the switch and cam grooves 6B and 7B for opening the switch. Here, when the vehicle is idling (when the throttle valve is closed), the cam groove 6 is connected to the movable contact IO, which will be described later, by the cam groove 6A for closing the switch, as shown in FIG.
A, the idle contact 8A is closed, and when the accelerator is operated, the movable contact 10A and the idle contact 8A are opened by the cam groove 6B for opening the switch.

On the other hand, the cam groove 7 opens the movable contact 10A and the full contact 9A, which will be described later, by the cam groove part 7B for opening the switch from the idling state until the accelerator is depressed by a predetermined amount.
When the throttle valve is opened wide by depressing the accelerator by a predetermined amount or more, the movable contact 10A and the full contact 9
A is closed by a cam groove portion 7A for closing the switch.

8.9 is the terminal bracket l-2A on the proximal side or both sides.

The springs 8 and 9 are fixed-side springs that are attached to the cam plates 2C and extend onto the cam plate 5, and the springs 8 and 9 are formed of an elongated rectangular temporary spring material, and have either a proximal end, a fixed end, or a distal end. It has a free end. The spring 8.9 supports the idle contact 8A and the full contact 9A at their free end sides, respectively.

10. 10 indicates a movable spring with a proximal end or fixed end and a free end on the distal end, and each spring 10
is formed of a substantially V-shaped plate spring material etc. which are integrally connected at the fixed end side, and the fixed end side is attached to the intermediate terminal bracket 1-2B. The free end side of each spring 10 is wound around each guide bin 11 to support each guide bin 11, which will be described later. has been done.

Reference numeral 11.11 indicates a guide bin attached to the free end side of each spring 10, the lower side of each guide bin 11 is formed to have a small diameter, and is slidably inserted into the cam grooves 6, 7. There is. Each guide bin 11 has a cam plate 50
During rotation, each cam groove 6A, 6B, ? of the cam groove 6°7? A
, 7B, and connect each movable contact 10A to the idle contact 8A and full contact 9 via each spring 10 on the movable side.
A is made to open or close, respectively.

Further, 13 is located between the cam plate 5 and the base 1,
A variable resistance substrate fixedly mounted on the base 1 is shown, and the substrate 13 cooperates with the potentiometer 12 to connect the cam plate 5.
The rotation angle of the throttle valve, that is, the opening degree of the throttle valve is detected and outputted to a control unit (not shown) via a signal line 14.

The throttle valve switch according to the prior art has the above-mentioned configuration, and when the vehicle is idling and the throttle valve is closed, one guide pin 11 that slides in the cam groove 6 moves as shown in FIG. As shown in the figure, the movable contact 10A of the movable spring 10 and the idle contact 8A of the fixed spring 8 are located in the cam groove 6A.
By this, it is possible to detect when the throttle valve is closed (hereinafter referred to as idling time). When the throttle valve is opened by depressing the accelerator of the vehicle, the cam plate 5 is rotated together with the throttle valve in the clockwise direction in FIG. 6 cam groove part 6A
Then, the movable contact 10A and the idle contact 8A are opened.

When the throttle valve is opened by a predetermined amount or more, the other guide pin 11 is inserted into the cam groove 7B of the cam groove 7.
The cam slides into the cam groove 7A and closes the movable contact 10A of the other movable spring 10 and the full contact 9A of the fixed spring 9, thereby causing the throttle valve to open more than a predetermined value (hereinafter referred to as , when the engine is fully accelerating). In this way, each detection signal such as idling and full acceleration is output to the control unit via the mating female connector connected to the male connector 2, and this control unit controls the fuel pump (not shown) of the fuel injection device. The rotational speed of the engine is adjusted to change the fuel discharge pressure.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, it is necessary to form cam grooves 6 and 7 each having a predetermined arc shape on the cam plate 5, and in addition, a spring equipped with the idle contact 8A, the full contact 9A, and each movable contact 10A is required. 8, 9, 10, etc., and each contact 8A.

9A, IOA, etc. must be made to perform opening and closing operations, resulting in a complicated structure and poor workability during assembly.

In addition, the contacts 8A, 9A, and IOA are not only susceptible to wear, but also may have an oxide film formed on their surfaces, resulting in poor conduction. Furthermore, each spring 8.9.
No. 10 cannot withstand long-term use, has problems such as breakage accidents, and has the disadvantage that it is difficult to improve reliability.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and the present invention provides a throttle valve switch that uses a non-contact sensor to significantly simplify the structure and improve reliability. It provides:

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a mounting member that is attached to the vehicle side, a rotating arm that is rotatably provided on the mounting member and rotates together with the throttle valve, and a distal end of the rotating arm. A pair of non-contact sensors are provided at predetermined positions for detection, and a Y terminal member is provided on the mounting member to support each of the non-contact sensors at predetermined positions. The following configuration is adopted.

[For production]

Since the pair of non-contact sensors are each arranged at a predetermined position via the Y terminal member, the object to be detected is rotated by the rotating arm toward each non-contact sensor, and While approaching the vehicle, a detection signal can be outputted from each non-contact type sensor, thereby making it possible to detect an idling state and a fully accelerating state, respectively.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. In this embodiment, the same components as those of the prior art shown in FIG. 4 described above are given the same reference numerals, and their explanations will be omitted.

In the figure, 21 indicates a base as a mounting member attached to the vehicle side, and the base 21 is the base 1 described in the prior art.
Similarly, the main body of the throttle valve switch is constructed, and a pair of mounting portions 21A, 21A are protruded from both sides thereof. Further, a cylindrical ring 3 serving as a bearing portion is integrally provided at the center of the base 21. A rotation shaft 4 is rotatably provided within the ring 3, and the rotation shaft 4 is provided with a fitting hole 4A and an arm 4B serving as a rotation arm.

Reference numeral 22 indicates a rotating plate located on the base 21 and rotatably disposed on the outer peripheral side of the ring 4, and the rotating plate 22 is formed almost in the same way as the cam plate 5 described in the prior art. , ring 4
The sliding hole 22A is slidably fitted on the outer circumferential side of the arm 4B, and the rotating shaft 4 is engaged with the distal end side of the arm 4B.
a pair of engaging protrusions 22B that rotate the rotating plate 22,
22B is provided. However, the cam grooves 6, 7, etc. are omitted from the rotary plate 22, so that its shape can be simplified. Further, a circumferential groove 22C extending in the circumferential direction over an angular range of, for example, about 100 degrees is formed on the outer circumferential side of the rotary plate 22, and both ends of the circumferential groove 22C can come into contact with a bottle 23, which will be described later. It becomes.

Reference numeral 23 indicates a bottle fixed to the base 21 at a predetermined position along the circumferential groove 22C, and the bottle 23 comes into contact with both ends of the circumferential groove 22C when the rotating plate 22 etc. rotates, and the rotating plate 22 Also, the rotation angle of the arm 4B, etc. is restricted to a predetermined angle. That is, the rotating plate 22 and the arm 4B are at an angle θ1. from the position shown in FIG. It is configured to rotate only over the range of θ2, and further rotation is restricted by the pin 23. On the other hand, a potentiometer 12 is attached to the lower surface of the rotary plate 22 in the same way as in the prior art, and the potentiometer 12 slides on a variable resistance substrate 13 fixed on the base 21 to connect the rotary plate 22, that is, the opening degree of the throttle valve, is detected and transmitted to the signal line 14.
It is designed to output to the control unit via.

Reference numeral 24 indicates a detected object located at the tip side of the arm 4B and fixed to each engagement protrusion 2, 2B of the rotating plate 22, and the detected object 24 is made of copper, aluminum, iron, or stainless steel, for example. It is formed by bending a metal plate such as a metal plate into a substantially U-shape, and is attached to the outside of each retaining protrusion 22B from above so that it can be rotated integrally with the rotation plate 22. Then, the detected object 24 is moved by the arm 4B at an angle θ3. It is rotated toward the θ2 side, for example, to positions A, .

Next, reference numeral 25.25 indicates non-contact sensors disposed at predetermined positions on the rotating plate 22, slightly apart from the detected object 24 at the positions AI and Az, and each of the sensors 25 are constructed of, for example, non-contact sensors (proximity switches) of horizontal eddy current type or high frequency wave type, and are designed to detect when the detected object 24 is in the vicinity of positions A1 and A2, respectively. That is, the first of the respective sensors 25
Since the throttle valve is closed when the detected object 24 is near the position AI, the sensor 25 located on the left side of the figure detects this as idling. On the other hand, when the detected object 24 is near position A2, the sensor 25 located on the right side detects this as a full accelerator because the throttle valve is wide open. Further, on the outer circumferential side of each sensor 25, a screw portion 2 for position adjustment is provided.
5A is formed.

Further, 26 indicates a Y terminal member which is fixed on the base 21 via a male connector 27 in order to be positioned at a predetermined distance above the rotating plate 22. A support portion 26A extending above the base 21 and a rotating plate 22 extending from the tip side of the support portion 26A.
It consists of arm parts 26B and 26C on both sides extending in an arc shape in the circumferential direction, and the tip sides of the arm parts 26B and 26C are downwardly L.
It is bent into a letter shape and supports each sensor 25 with a predetermined orientation angle. Here, the arm 2
The threaded portion 25A of each sensor 25 is attached to the tip side of 6B and 26C.
Screw holes 26D and 26E into which the sensors 25 are screwed are formed as shown in FIG. 3, and the position of each sensor 25 can be adjusted in the front-rear direction via the screw holes 26D and 26E. Further, the male connector 27 is formed in substantially the same manner as the male connector 2 described in the prior art, and is connected to each sensor 25 via signal lines 28 and 28.

The throttle valve switch according to this embodiment has the configuration described above, and its operation will be explained next.

The non-contact sensor 25 on the arm 26B side of the Y terminal member 26 is located near the position A indicated by the two-dot chain line in the figure.
This detects when the vehicle is idling. Next, when the accelerator of the vehicle is depressed and the throttle valve is opened widely, the detected object 24 passes through the position shown by the solid line in FIG. 1 and moves to the position At side shown by the two-dot chain line. Since the arm 4B rotates, the non-contact sensor 25 on the arm 26C side detects when the vehicle is fully accelerated.

The detection signals from each sensor 25 during idle and full acceleration are sent to the male connector 27 via each signal line 28, and are controlled via the mating female connector connected to the male connector 27. The control unit can thereby adjust the rotation speed of the fuel pump of the fuel injection device and change the fuel discharge pressure etc. as appropriate.

According to this embodiment, the detected object 24 is rotated together with the throttle valve via the arm 4B etc., and the position i! /
'+, Since each non-contact type sensor 25 is arranged to detect when the vehicle is idling and when it is fully accelerating while being placed near the cam groove 6.7 and Ax, as in the prior art,
Each spring 8, 9゜10 and each contact 8A, 9A, I
It is possible to eliminate the need for office automation equipment, greatly simplify the structure, reduce the number of parts, and reliably improve workability during assembly.

In addition, since the non-contact type sensor 25 is used, problems such as poor conduction between the contacts 8A, 9A, and IOA and failures of the springs 8, 9, and 10 due to breakage can be solved as in the prior art. , it is possible to significantly improve trustworthiness.

In the above embodiment, a metal plate is used as the detected object 24, and an eddy current loss type or high frequency wave type sensor is used as the non-contact type sensor 25, but instead of this, the detected object 2
4 may be formed of a magnet or the like, and the non-contact sensor 25 may be formed of a magnetoresistive element or the like, or alternatively, both sides of the object to be detected 24 may be mirror-finished and the non-contact sensor 25 may be formed of a light sensor or the like. It is possible to use various non-contact sensors such as.

Further, in the embodiment described above, the potentiometer 12 is provided on the lower surface side of the rotary plate 22 and is slid on the substrate 13 to detect the opening degree of the throttle valve, etc. , potentiometer 12, board 1
3 etc. is not necessarily required, each non-contact type sensor 2
5, it is also possible to detect the opening degree of the throttle valve. If the rotating plate 22 is omitted, the detected object 24 may be directly attached to the tip side of the arm 4B.

〔Effect of the invention〕

As detailed above, according to the present invention, the object to be detected is provided on the tip side of the rotating arm that rotates together with the throttle valve,
In order to detect the proximity of the object to be detected, a pair of non-contact sensors are arranged at predetermined positions via the Y terminal member, so when the throttle valve is closed, one of the non-contact sensors is activated. One sensor can detect when the engine is idling, and when the throttle valve is wide open, the other sensor can detect when the engine is fully accelerating.

The structure can be greatly simplified compared to conventional technology,
This has various effects such as improving workability during assembly and increasing reliability.

[Brief explanation of the drawing]

1 and 3 show an embodiment of the present invention, FIG. 1 is a plan view of the throttle valve switch, FIG. 2 is a perspective view showing the main parts in FIG. 1, and FIG. 3 is a Y terminal member. A partial cross-sectional view showing a state in which a non-contact sensor is attached to the tip side of the
FIG. 4 is a plan view showing a throttle valve switch according to the prior art. Dynamic...non-contact sensor, 26...Y terminal member,
27...Male connector, 28...Signal line. Patent Applicant Japan Electronics Co., Ltd. Agent Patent Attorney Kazu Hirose Onma Naoki Nakamura Figure 2 Figure 3

Claims (1)

[Claims] A mounting member attached to a vehicle side, a rotating arm rotatably provided on the mounting member and rotating together with a throttle valve, a detected object provided on the tip side of the rotating arm, and the detected object. In order to detect the proximity of the detected object when the body is rotated by the rotating arm, a pair of non-contact sensors are arranged at predetermined positions, and each of the non-contact sensors is set to a predetermined position. and a Y terminal member provided on the mounting member to support the throttle valve switch in position.