JPS6181220A - Stroke switch - Google Patents

Abstract

PURPOSE:To permit cutting of operation of an air conditioner in case high power performance of an engine is required by providing a stroke switch suitable to an air conditioner control system having a rod which receives input signals operatively connected to a throttle valve or an accelerator pedal. CONSTITUTION:When an accelerator pedal is depressed, a rod 14 of a stroke switch 10 is pressed to the left, and a switch actuating member A is moved to the left against a second spring 21, until a shoulder 16c of a moving element 16 comes in abutment against a projection 18b of a holder member 18. At this time, a plate portion 16b of the moving element 16 shuts down the optical axis in a slit of a photoelectric switch 19 to turn off the photoelectric switch 19, thereby actuating a timer circuit 20. This causes a relay 31 to be actuated for a set period of time and a compressor 32 is stopped to cut the operation of the air conditioner. After the set period of time elapsed, output of the timer circuit 20 is inverted or turned off, causing restarting of the air conditioner.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a stroke switch, and more specifically to a stroke switch with an electric timer, and is applicable to an automobile air conditioner control system, etc. be done.

(Prior Art) Conventionally, as an example of a strobe switch for an air conditioner control system, one described in Japanese Patent Application Laid-open No. 130816/1983 is already known. This stroke switch is equipped with a negative pressure chamber formed by a diaphragm in the housing, and the negative pressure chamber is communicated with the intake manifold of the engine via a rubber hose, etc., and the manifold negative pressure is adjusted to the above negative pressure according to the operating state of the engine. transmitted to the chamber. A center rod is fixed to the die 8 phragm, and a movable contact is disposed at one end of the rod, and the movable contact is configured to be able to contact a fixed contact disposed on the switch body side. That is, when the engine is idling,
Alternatively, when the intake manifold negative pressure is greater than a predetermined value, such as when driving at a constant speed, the center rod moves against the biasing force of the spring (2), causing both contacts to come into contact and the air conditioner to operate. Conversely, when the intake manifold negative pressure is smaller than a predetermined value, such as during acceleration, the center rod moves in the opposite direction due to the urging force of the spring, and both contacts are separated, cutting off the operation of the air conditioner.

(Problem to be Solved by the Invention) However, in the air conditioner control system using the conventional stroke switch described above, since the engine's intake manifold negative pressure is used as an input signal for air conditioner control, This did not directly correspond to the time when performance was needed; for example, on a relatively long uphill course, the acceleration state continued, so the air conditioner was constantly cut off, impairing the driver's comfort. Furthermore, when acceleration and deceleration are repeated in relatively short cycles, the compressor follows this operation and is turned off, which significantly shortens the life of the compressor. In addition, in the conventional switch structure described above, the load applied to the switch contacts differs depending on the strength of the negative pressure signal transmitted to the negative pressure chamber. Therefore, when the manifold negative pressure is large, such as when the engine is idling or decelerating, the stress between both contacts becomes large, which poses a problem in the operational durability of the contacts.

Therefore, in view of the problems of the prior art described in -1-, the present invention provides a method to turn on the air conditioner when the power performance of the engine is required, and to automatically turn on the air conditioner after a predetermined period of time has elapsed. At the same time, the technical challenge is to improve the durability of the switch section.

[Structure of the invention]

(Means to solve the problem) The technical measures taken to solve the above technical problem are:
The rod, the first spring, and the movable element constitute a switch actuating body, the movable element has a movable shaft having a flat tip, and the photoelectric switch is fixed to a resin holder member having a bearing part for the movable shaft. , the flat plate portion of the movable member is movably disposed within the slit of the photoelectric switch, the photoelectric switch is electrically connected to a board having a timer circuit, and the switch actuating body is always operated by a second spring. The second spring is biased in the direction of extension of the rod, and the spring force of the second spring is set to be weaker than that of the first spring.

(Function) When the stroke switch with the above configuration is adopted for controlling the air conditioner of an automobile, the rod is attached so as to be interlocked with the throttle valve of the carburetor or the accelerator pedal via a link, so that it can be When the power performance of the engine is required, the operation of the air conditioner is cut off, that is, the stroke switch is used to drive the relay, and when the relay is turned on, the compressor is turned off, and it is automatically turned on after a predetermined period of time. . Therefore, the operation of the air conditioner can be cut only when engine power is required, and even when driving on a long uphill road, the operation of the air conditioner will be turned on after a predetermined period of time (can be approved arbitrarily), impairing the driver's comfort. It's not something.

In addition, even in acceleration/deceleration operations with relatively short cycles, the timer circuit can be added with a function that allows the timer to operate in response to the latest input even if it receives an input signal with a cycle shorter than the set time. Because of this, the compressor does not operate intermittently and does not impair its durability.

Furthermore, the switch mechanism according to the present invention is comprised of a movable element and a means for detecting the interruption of light by a photoelectric element, and has a so-called contactless structure, which significantly improves operational durability.

(Example) Hereinafter, an example embodying the technical means of the present invention will be described based on the accompanying drawings.

The strobe switch 10 shown in FIG. 1 has a metal case 11, and a resin cover 12 is inserted and fixed into the left open end of the case 11 via a seal member 13. A bearing part is formed in the small diameter part 11a on the right side of the case 11 in the figure,
A rod 14 is slidably disposed on the bearing portion 11a, and a hook member 15 that can engage with the flange portion 14a of the rod 14 is disposed within the middle diameter portion 11b of the case 11. The movable element 16 connected to the hook member 15 has its movable shaft 1
The movable element 16 and the first spring 17 constitute a switch actuating body A. A resin holder member 18 is inserted and fixed into the large diameter portion 11C of the case 11, and the holder member 18 has a guy 1' portion 18a that guides the movable shaft 16a of the movable element 16. A photoelectric switch (photo ink club) 19 is fixed to the boulder member 18, and a flat plate portion 16b of the movable member 16 is movably disposed within a slit of the photoelectric switch 19. Further, the photoelectric switch 19 is electrically connected to a substrate 2o having a timer circuit. The aforementioned switch operating body A
(The movable element 16) is normally biased by the second spring 21 in the direction in which the rod 14 extends. In addition, the second spring 2
The spring force of No. 1 is set weakly by the first spring 17.

In this way, the second spring 21 normally
That is, the movable element 16 is urged in the direction of extension of the rod 14, and the flat plate portion 16b of the movable element 16 is set so as not to block the portion of light passing through the slit 1- of the photoelectric switch 19.

At this time, the photoelectric switch 19 is in the ON state, and the board 20 is in the ON state.
The timer circuit within is inactive.

Now, as shown in FIG. 2, when the rod '14 is pressed in conjunction with the accelerator pedal 30, the first spring 17
The spring force becomes larger than that of the spring 21, and the switch actuating body is displaced to the left in the figure against the second spring 21, and the mold portion 16c of the mover 16 is moved against the protruding portion 18b of the holder member 18.
It comes into contact with J and stops. At this time, the flat plate portion 16b of the movable element 16 shields the optical axis within the slit I of the photoelectric switch 19, so the photoelectric switch 19 is turned OFF, and from this moment on, the timer starts functioning.At the same time, the timer circuit 20 Turn on the output. Therefore, the relay 31 is driven by the output signal of the timer circuit 20, and the compressor 32
becomes OFF. That is, by pushing the rod 14 of the strobe switch 10, the operation of the air conditioner is cut off. After the set time has elapsed, the output of the timer circuit 20 is reversed (turned OFF) and the air conditioner is turned ON again. The rod 14 is connected to the first spring 1 for switch operation.
Since the structure is such that the invalid stroke is absorbed by the action of 7, the durability of the switch is guaranteed even when the rod 14 has an abnormal stroke. 22 is a connector, and 33 and 34 in FIG. 2 are an air conditioner switch and a battery, respectively.

As described above, the stroke switch 10' of the present invention uses the stroke of the rod 14 as an input signal (non-contact) to turn the switch ON, and then turns OFF after a predetermined time regardless of the position of the rod 14. Effect] According to the present invention, instead of using the engine's intake manifold negative pressure as an input signal, the input signal received by the rod can be linked to the carburetor's throttle valve or accelerator pedal, so it can be applied to diesel cars as well as gasoline engines. becomes. Also, the compressor's 0N-
Since the OFF switching is controlled by rod stroke detection and an electric timer, the compressor can be turned OFF in a short time.
The life of the compressor will not be shortened by repeated OFF cycles, and the comfort level will not deteriorate even if the OFF state continues for a long period of time. In order to eliminate the drawbacks of the conventional air conditioner control stroke switch mentioned above, a negative pressure delay valve (VTV) was inserted into the rubber hose that connects the intake manifold and the negative pressure chamber of the rotor switch. It is conceivable to add a timer function to the negative pressure delay valve, but since this negative pressure delay valve consists of an orifice and a check valve in parallel, there are problems such as large variations in the timer setting time and a complicated system due to an increase in the number of parts. However, according to the present invention, the problem of sagging can also be solved at the same time.

Furthermore, since the ON-OFF control of the relay is made contactless using a semiconductor and non-conductor, there is no deterioration of the control unit, and the stroke detection of the moon rod is made non-contact and non-contact using a photoelectric switch (photo ink club). Therefore, deterioration due to wear and tear of the switch section and deterioration due to spark generation are eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a stroke switch according to the present invention, and FIG. 2 is a system diagram showing an automobile air conditioner control device employing the stroke switch of FIG.

Claims (1)

[Claims] A case having a bearing portion in a small diameter portion, a rod slidably disposed on the bearing portion of the case, and a movable element operatively connected to the rod via a first spring and having a flat plate portion at its tip. a holder member fixed in the case and guiding the operation of the movable element; a photoelectric switch held by the holder member; a board having a timer circuit electrically connected to the photoelectric switch; a second spring that always biases the armature in the direction of extension of the rod; A stroke switch that sets the force to be weaker than the first spring.