JPH04104534U - Liquid level detection device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to make the detection signal less likely to fluctuate even if the liquid level fluctuates in a liquid level detection device. [Structure] A damper tool 8 is provided in which a movable piece 8b that is moved in conjunction with the rotation of the float arm 2 is housed in a damper agent storage section 8a that stores a viscous damper agent. Further, the damper tool 8 is attached to the frame 3 via the mounting piece 8d.
Attaches removably to the The movable piece 8b is connected to the float arm 2 by removably fitting the connecting piece 8c into the fitting part 41a of the contact holder 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a liquid level detection device, and particularly relates to a liquid level detection device that has a float attached to one end. The other end of the arm is rotatably attached to the bearing part of the frame, and the contact A resistor is connected to a contact holder that holds the contact, and the contact is fixed to the frame. The antibody is slidably brought into contact with the antibody, and the resistance value changes as the float moves, increasing the liquid level. The present invention relates to a liquid level detecting device that detects liquid level.

0002

[Conventional technology]

This type of conventional liquid level detection device will be explained using FIG. 5. The liquid level detection device shown is , float a floating on the liquid level in the fuel tank, and a flow with float a held at one end Float arm b and a float fixed to the fuel tank and rotatably supporting float arm b. It is attached to frame c and the other end of float arm b via contact holder d. contact e and the frame c so that this contact e slides over it. It is composed of a contact e and a resistor f fixed opposite to the contact e.

0003 With the above configuration, when float a moves up and down depending on the height of the liquid level, the float Since arm b rotates relative to frame c, contact e slides over resistor f. id, and the contact position changes. And the resistance value of the resistor f in the detection circuit The change in is extracted as an electrical signal, and this electrical signal is sent to the internal unit of the meter (not shown). The remaining amount of fuel can be displayed by moving the pointer in conjunction with the dial. I can.

0004

[Problem that the idea aims to solve]

However, in the conventional liquid level detection device described above, acceleration/deceleration, left/right rotation, and When this cycle is performed, the liquid level fluctuates within the fuel tank as shown in FIG. This way When the liquid level shakes, the float a floating on the liquid surface moves up and down, and as a result, , float arm b rotates relative to frame c, and contact e moves over resistor f. The contact position changes as it slides, and the electrical signal from the detection circuit is constantly generated. The problem was that it fluctuated.

[0005] Therefore, in view of the above-mentioned conventional problems, the present invention provides a detection signal that can be used even when liquid level fluctuations occur. The purpose of the present invention is to provide a liquid level detection device in which the number does not easily fluctuate.

[0006]

[Means to solve the problem]

In order to solve the above problems, the liquid level detection device developed according to the present invention has one end connected to the flow Attach the other end of the float arm with the attached float to the bearing part of the frame so that it can rotate. and is connected to a contact holder that holds the contact, and the contact is slidably in contact with a resistor fixed to the frame, and the resistance caused by the movement of the float is In a liquid level detection device that detects the height of the liquid level based on changes in the value, the viscosity is a damping agent storage section in which a damping agent having a damping agent is stored; , a movable piece that is moved within the damper agent in conjunction with the rotation of the float arm; It is characterized by having a damper tool having the following characteristics.

[0007] In addition, the liquid level detection device made according to the present invention in order to solve the above problems is The damping tool can be freely attached to and detached from the frame via a mounting piece provided in the damping agent storage section. The movable piece is connected to the movable piece, and the other end of the connecting piece is connected to the movable piece. Connects to the float arm by removably fitting into the fitting part formed on the tact holder. It is characterized by what it did.

[0008]

[Effect]

With the above configuration, the rotation of the float arm with a float attached to one end The movable piece of the damper tool interlocks with the viscous damper stored in the damper agent storage section. It moves through the float arm, and a braking action is constantly applied to the rotation of the float arm. Therefore, the float tends to move up and down due to changes in the liquid level due to disturbances. However, due to the above-mentioned braking action, the float and float arm are protected against disturbances in the liquid level. Your ability to follow changes and move becomes restricted.

[0009] In addition, the damper is removably attached to the frame using the mounting piece, and The connecting piece is removably fitted to the fitting part of the contact holder, and the movable piece and flow Since it is connected to the toarm, the damper can be easily removed from the frame. Can be removed.

0010

【Example】

Figure 1 is an exploded view showing an embodiment of the liquid level detection device of the present invention, and Figure 2 is a contact holder. Figure 3 is a front view of the damper of the liquid level detection device in Figure 1. 4 are sectional views of essential parts of the damper tool shown in FIG. 3.

[0011] In the figure, the liquid level detection device has a float 1 floating on the liquid level in the fuel tank at one end. The attached float arm 2 can rotate freely on the frame 3 fixed to the fuel tank. is supported by Also, the other end of the float arm 2 is fixed within the frame 3. A contact holder 4 holding a contact 5 sliding on a resistor 6 is connected. It is.

0012 More specifically, a bearing portion 3a (shown in FIG. 2) is formed at the bottom of the frame 3, The L-shaped bent end 2a of the float arm 2 is attached to the frame 3 at this bearing portion 3a. It is penetrated from one side. The penetrating end of this end 2a is on the other side of the frame 3. It is tightly fitted into a hole 4a formed in the center of the contact holder 4.

[0013] A coil spring 7 is interposed between the contact holder 4 and the frame 3. The elastic force of this coil spring 7 causes the contact holder 4 to be attached to the frame 3. It is constantly biased in the direction away from it.

[0014] In addition, the contact holder 4 has a structure that extends in the same direction as the extension direction of the float arm 2. A holding part 4b is formed, and two pairs of split claws 4c are integrally attached to this holding part 4b. The inside of the split claw 4c is formed by pressing the float arm 2 from above the split claw 4c. The float arm 2 is inserted and fixed to the.

[0015] The liquid level detection device of this embodiment further includes a damper tool 8. This damper tool 8 is a damper agent storage section 8a in which a damper agent such as viscous silicone oil is stored; The damper agent is stored in the damper storage portion 8a, and the damper agent is moved in conjunction with the rotation of the float arm 2. It has a movable piece 8b that is moved inside the agent. This damper agent storage section 8a is Round hole 81d of mounting piece 8d formed integrally with this and round hole 3b of frame 3 By screwing a nut (not shown) onto the bolt 9 inserted into the frame 3, It can be detachably attached to.

[0016] The damping agent storage portion 8a has an empty space therein for storing the movable piece 8b and the damping agent. It is composed of a storage section main body 81a and a lid body 82a that form a space between them. The above movable piece 8b is inserted into a round hole 81b formed at one end thereof, and both ends thereof are provided with damper agent storage portions. A rotating shaft 8e, which is supported by a bearing portion 8f of 8a, is press-fitted. This rotating shaft 8 e has one end protruding from the damper agent storage section 8a, and one end is an L-shaped connecting piece. It is press-fitted and tightly fitted into a round hole 81c formed at one end of 8c. Also , the other end of this connecting piece 8c is formed on the holding part 4b of the contact holder 4. It is removably fitted into the fitting part 41b.

[0017] In addition, in the damper agent storage part 8a, one side has an injection hole into which the damper agent is injected, and the other side has an injection hole. Two round holes 83a are formed to serve as air vent holes for venting air during injection. . These two round holes 83a are sealed with an adhesive or the like after the damper agent is injected. In addition, A metal cover 10 is attached to the arm 3 to protect the resistor 6 and the like.

[0018] With the above configuration, the float arm 2 with the float 1 attached to one end is connected to the float arm 2 via a connecting piece 8c, and rotates in conjunction with the rotation of the float arm 2. The movable piece 8b of the damping tool 8 moves the viscous damping agent stored in the damping agent storage portion 8a. The float arm 2 is moved inside the float arm 2, and a constant braking action is applied to the rotation of the float arm 2. , so the height of the liquid level changes due to disturbances, causing float 1 to fluctuate up and down. However, due to the above-mentioned braking action, float 1 and float arm 2 are The movement of the contact 5 on the resistor 6 is restricted and the movement following the change due to disturbance is restricted. Slide shake is eliminated, and the electrical signal from the detection circuit is less likely to fluctuate.

[0019] Further, the damper tool 8 can be freely attached to and detached from the frame 3 by means of an attachment piece 8d. At the same time, the connection between the movable piece 8b and the float arm 2 is connected to the contact hole. This is done by removably fitting the connecting piece 8c to the fitting part 41b of the router 4. Therefore, if the damper tool 8 is removed from the frame 3 or damaged when it is not needed, etc., can be easily replaced.

[0020]

[Effect of the idea]

As explained above, the liquid level detection device according to the present invention is connected to the rotation of the float arm. The movable piece of the moving damper tool absorbs the viscous damper agent stored in the damper agent storage section. It moves inside the float arm, and a braking action is always applied to the rotation of the float arm. Therefore, even if the float tries to move up or down due to a change in the liquid level due to disturbance, , due to the braking action described above, the float and float arm are subject to changes due to disturbances in the liquid level. This has the effect that the detection signal is less likely to fluctuate.

[0021] In addition, the damper is removably attached to the frame, and the movable piece and floor The connection with the contact arm is made by removably fitting the connecting piece into the fitting part of the contact holder. This is done depending on the condition of the damper, so if it is not needed or damaged, please remove the damper from the frame. can be easily removed and replaced.

[Brief explanation of drawings]

FIG. 1 is an exploded view of an embodiment of a liquid level detection device according to the present invention.

FIG. 2 is a sectional view of essential parts showing an assembled state of the contact holder of the liquid level detection device of FIG. 1;

FIG. 3 is a front view of a damper of the liquid level detection device of FIG. 1;

FIG. 4 is a sectional view of a main part of the damper tool shown in FIG. 3;

FIG. 5 is a schematic structural diagram of a conventional liquid level detection device.

[Explanation of symbols]

1 float 2 Float arm 3 frames 3a Bearing part 5 Contact 4 Contact holder 6 Resistor 8 Damper tool 8a Damper agent storage section 8b Movable piece 8c Connecting piece 8d Mounting piece 41b Fitting part

Claims (2)

[Scope of utility model registration request] Claim 1: The other end of a float arm with a float attached to one end is rotatably attached to a bearing part of a frame, and is connected to a contact holder that holds a contact, and the contact is attached to a resistor fixed to the frame. A liquid level detection device that detects the height of the liquid level based on a change in resistance value as the float moves in slidable contact with the float, includes a damping agent storage section containing a viscous damping agent; A liquid level detection device comprising: a damper member that is housed in a damper storage portion and has a movable piece that is moved within the damper agent in conjunction with rotation of the float arm. 2. The damper tool is removably attached to the frame via an attachment piece provided in a damper agent storage part, and the movable piece is connected to the movable piece at one end, and the other end of the connecting piece is connected to the movable piece. 2. The liquid level detection device according to claim 1, wherein the liquid level detection device is connected to the float arm by being removably fitted into a fitting portion formed on a contact holder.