JPS6018720A - Contact-point holding mechanism in liquid level gage using thick film resistor - Google Patents

Abstract

PURPOSE:To stabilize the contact pressure between a slider and a thick paper resistor, by the constitution wherein the central part of rotation of the slider is rotated by a rotary between facing bracket and a holding plate with the central part being held by two rotary bodies. CONSTITUTION:A rotary body 39 is inserted into a rotary-body holding hole 5 of a bracket main body 1. A base part 54 of a slider 53 is coupled to a coupling projection 48 of the rotary body 39 from the outside. A coupling recess part 50 of a following rotary body 49 is coupled to the coupling projection 48 of the rotary body 39. Under this state, a holding plate 8 is fixed to a supporting piece of the bracket 1. Therefore, the slider 53 is held by the rotary body 39 and the following rotary body 49 between the bracket main body 1 and the holding plate 8, and rotated by the rotary body 39. In this constitution, the contact between the slider 53 and thick film resistor films 14A and 14B is always stabilized, and the occurrence of measurement errors can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a contact holding mechanism in a liquid level gauge using a novel thick film resistor. In detail, this is a new contact holding device that rotatably holds the slider without using caulking means so that the contact pressure of the slider against the thick film resistor remains constant without changing. It is intended to provide a mechanism.

BACKGROUND ART AND PROBLEMS There is known a contact holding mechanism in a liquid level gauge using a thick film resistor, for example, as shown in FIGS. 1 and 2.

A is a bracket main body fixedly provided to the liquid storage tank, and a horizontal rotation axis C is between the bracket main body a and a holding plate arranged parallel to the main body a at an appropriate distance. It is rotatably supported. A portion of the horizontal rotation shaft C protruding from the outer surface of the bracket body a is bent at a right angle to form a rotation arm d.

A float e is fixed to the tip of the rotating arm d, and when the float e moves up and down in response to fluctuations in the liquid level in the tank, the rotating arm d rotates around its base accordingly. It is being done.

A cylindrical slider holder f is externally fixed to the middle part of the horizontal rotation axis C, and a slider holder f is fitted on the end face g of the holder f on the side opposite to the bracket main body so as to extend in the centrifugal direction from there. A slider holding plate is fixed, and a plate-shaped slider i is held at the tip of the slider holding plate.

The tip of the slider i is brought into elastic contact with a fan-shaped thick film resistor j, and the horizontal rotation axis C is caused by the vertical movement of the float e.
When the slider i is rotated, the tip of the slider i slides on the surface of the thick film resistor j.

According to such a mechanism, the vertical movement of the float e due to a change in the liquid level is converted into the rotational movement of the rotating arm d on which the float e is supported, and the rotation is caused by the movement of the slider holding plate. This is conveyed to Suriko I. Then, the contact position of the slider i with the thick film resistor j changes in an arcuate trajectory, and the resistance value between one end of the thick film resistor j and the slider i changes accordingly. do. Since a constant voltage is applied between one end of the thick film resistor j and the slider i, the current flowing there changes depending on the change in resistance value due to changes in the liquid level. Specifically, the horizontal rotation axis C in the above mechanism is supported by the bracket body a and the holding plate in the following manner.

That is, by plastically deforming the end k of the horizontal rotation axis C on the rotation arm d side, for example, several engaging protrusions 1.1101. , and then insert the washer m from the opposite rotational arm d side of the rotational shaft C to the engagement protrusion 1.1111. , insert the horizontal rotation shaft C into the bracket body a from the opposite end of the rotation arm d, and then insert the horizontal rotation shaft C between the bracket body a and the holding plate. The above-mentioned cylindrical slider holder f is fitted onto C, and the tip of the horizontal rotation axis C is inserted into the holding hole n of the holding plate, and the horizontal rotation axis C Caulk the tip protruding from the retaining plate.
, so that the horizontal rotation axis C is rotatably supported between the bracket body a and the holding plate.

By the way, when caulking the tip of the horizontal rotation shaft C, it is best to reduce the amount of protrusion of the horizontal rotation shaft C from the holding plate so that the tip properly engages with the holding plate. Although it is possible to eliminate the misalignment of C, in this case, when crimping, a large force is applied to the retaining plate B and the bracket body A, and the retaining plate B and the bracket body A are deformed by that force. be. In extreme cases, the horizontal rotation axis C may even become unable to rotate. Therefore, in order to avoid deformation of the retaining plate and the bracket body a, the amount of protrusion of the horizontal rotation shaft C from the retaining plate is increased to create play between the caulked portion at the tip and the retaining plate. If you let it slide, the retaining plate will be removed during caulking.
Although it is possible to prevent almost any force from being applied to the bracket body a, in this case, the horizontal rotation axis C tends to shift in the axial direction during rotation, and this shift causes the thickness of the slider i to decrease. Contact with membrane resistor j becomes unstable,
There was a risk that the A111 constant error would become large or that measurement would become impossible.

Purpose of the Invention The present invention has been made in order to improve the following drawbacks, and it is possible to hold the slider rotatably without using caulking means and change the contact pressure of the slider against the resistor. The present invention aims to provide a novel contact holding mechanism that is always kept constant without causing any damage.

Summary of the Invention In order to achieve the above object, the contact holding mechanism in the liquid level gauge using the thick film resistor of the present invention is provided with a contact holding mechanism that is mounted on a bracket that is fixedly provided to the liquid container and faces a part of the liquid container at an appropriate distance. A rotating body holding hole is formed at a position where the bracket and the holding plate face each other, and an insertion hole rotatably inserted into the rotating body holding hole of the bracket is formed between the bracket and the holding plate. and a driven rotor having a fitting portion that is rotatably fitted into the rotor holding hole of the holding plate, and the driven rotor is rotated so that its contact end is in sliding contact with the thick film resistor. The rotating center of the moving slider is sandwiched between the two rotating bodies.

EXAMPLES Below, a contact holding mechanism in a liquid level gauge using the thick film resistor of the present invention will be explained in detail according to examples shown in the accompanying drawings.

3 to 11 show an example of a contact holding mechanism in a liquid level gauge using the thick film resistor of the present invention, which is applied to a contact holding mechanism in an automobile fuel gauge.

In the drawings, reference numeral 1 denotes a plate-shaped bracket main body, one end of which is bent at a right angle to form a fixing piece 2. 3
is a mounting plate to which the bracket body 1 is attached, and is fixed to the ceiling of the liquid container. Reference numeral 4 denotes a hilly portion formed at the center of the mounting plate 3, which is formed by raising the center of the mounting plate 3 on the side opposite to the surface fixed to the ceiling of the liquid container. A space is created in between, which allows a terminal, which will be described later, to be inserted through the center of the space. and,
The fixing piece 2 of the bracket main body l is fixed to one side edge of the hilly part 4 of the mounting plate 3 by means such as welding, and when the mounting plate 3 is fixed to the ceiling of the liquid container, the bracket main body l It is supported in a hanging manner from the ceiling of the liquid storage container.

A rotating body holding hole 5 is bored in a portion of the bracket body 1 from the end on the side opposite to the fixed piece 2 toward the center of the bracket body 1. Reference numeral 6.6 denotes a pair of support pieces provided on both side edges of the bracket body 1, which are bent approximately at right angles to the surface side of the bracket body 1 at positions opposite to each other with the rotating body holding hole 5 in between, and are opposed to each other. has been done. 7.7.7.7 is a caulking projection formed at the tip of the support piece 6.6. Reference numeral 8 denotes a holding plate provided at a position facing the bracket main body 1, and the protrusions 7, 7, 7 are inserted into insertion holes 9.9 provided on both sides of this holding plate 8. The ends are caulked upward and downward, respectively, so that the retaining plate 8 is supported between the tips of the pair of supporting pieces 6.6, and is opposed to the bracket main body 1 at a distance of one foot. Reference numeral 10 denotes a driven body holding hole, which is provided approximately at the center of the holding plate 8, and is opposed to the rotary body holding hole 5.

Reference numeral 11 denotes an insulating substrate mounted on the surface of the bracket main body 1 with rivets, and a hole having a larger diameter than the holding hole 5 is provided in the insulating substrate 11 at a position facing the rotating body holding hole 5 formed in the bracket main body 1. 12 are formed. Reference numeral 13 denotes a thick film resistance forming substrate disposed on the insulating substrate 11, and thick film resistance films 14A and 14B, which will be described later, are formed on the ceramic substrate.
Specifically, the thick film resistive film 14A is made by mixing precious metal powder with an organic binder.
14B, make a paste for forming lead parts and electrode parts, print this on a ceramic substrate, and then about 730~
It is produced by combustion at a temperature of 1000°C.

The thick film resistive films 14A and 14B are arranged side by side in a substantially circular arc with the rotating body holding hole 5 as the center.

15 is a thick film resistor film 14A on the thick film resistor forming substrate 13;
It is a lead part formed of the same material as 14B, and 16a
, 16b, 16c, 16d, and 16e are electrodes similarly formed on the substrate 13.

Electrode 18a is located at the upper left corner in FIGS. 3 and 4, electrode 16b is also located at the lower left corner, and electrode 16c
is located in the lower right corner. The electrode 16d is a thick resistive film 14A.
The electrode 16e is provided at a position close to the electrode 16b along the lower edge of the substrate 13. The electrode 16a and the electrode 16c are connected by a lead portion 15.

Further, one end of the electrode 16b is connected to the electrode 1 by the lead portion 15.
6d, and the left end of the thick film resistive film 14A and the left end of the thick film resistive film 14B are directly connected to the lead portion 15.

Further, the electrode 16e is connected to the thick resistive film 1 by the lead portion 15.
4A and the right end of the thick film resistive film 14B.

Reference numeral 17 denotes a mounting piece for fixing the lower left part of the thick film resistance forming substrate 13 in FIG.
b, and the half portion 17b on the mounting plate 3 side is fixed to the insulating substrate 11 with rivets. The upper right portion of the thick film resistor forming substrate 13 in FIG. 3, where the electrode 16a is provided, is fixed to the insulating substrate 11 by soldering a conductive connection piece, which will be described later, to the electrode 16a. However,
The thick film resistor formed substrate 13 is fixed onto the insulating substrate 11 by pressing the diagonal portions where the electrodes 16a and 16b are provided.

18a, 18b, 18c, 18d are thick film resistance forming substrates 1
3 is a positioning protrusion integrally formed on the surface of the insulating substrate 11 for positioning when fixing the resistor 3 to the insulating substrate 11. 18c is located on the left side in FIG. 3 and is located on the side edge of the thick film resistor forming substrate 13 on the mounting plate 3 side, that is, the lower side edge in FIG. 3. It is provided at a position where it comes into contact with the side edge of the side. Further, 18d is provided at a position where it abuts on an inclined side 19 formed by obliquely cutting out the lower right corner of the thick film resistor forming substrate 13 on which the electrode 16C is provided.

20a and 20b are terminals provided in a terminal mounting hole 21.21 provided in the hilly portion 4 of the mounting plate 3 in the shape of a tributary, and are connected to the thick film resistive films 14A and 14B and the lead portion 15a.
, 15b, 15c and a slider to be described later, and a liquid detection circuit (not shown) provided outside the container of the front body 1y. The ends of the terminals 20a, 20b on the bracket I/main body 1 side are connected to the electrodes 16b, 1 via lead wires 22, 22, respectively.
Connected to 6C.

The terminal 20a is rod-shaped and has a flange 23 integrally formed in its middle portion, and a portion above the flange 23 in FIG. 7 is formed into a cylindrical shape and serves as a lead wire connection portion 24. . Further, the portion below the flange 23 is formed into a regular square prism shape, and a thread groove 25 is formed on the outer peripheral surface of the cylindrical portion at the tip of the portion. 26 is a spacer for insulating between the terminal 20a and the mounting plate 3, and has a hole 28 with a square cross section through which the rectangular columnar portion 27 of the terminal 20a is passed, and a flange 2 at one end.
6a is integrally formed. The spacer 26 is fitted into the terminal mounting hole 21 of the mounting plate 3 from the bracket main body l side, and its flange 26a is inserted into the terminal mounting hole 21 of the mounting plate 3.
is engaged with the edge of the An O-ring 29 is fitted onto the flange 26a of the spacer 26, and a square prism 27 of the terminal 20a is fitted into the hole 28 of the spacer 26 from the bracket main body l side. The portion of the terminal 20a protruding from the terminal mounting hole 21 is fitted into the insertion hole 31 of the insulating plate 30 disposed on the side of the mounting plate 3 opposite to the bracket body, and the insulating plate 320 connects the mounting plate 30 to the opposite side of the bracket body. The side surface and the terminal 20a are insulated. A nut 32 is screwed into a portion 33 of the terminal 20a that protrudes from the insertion hole 31 of the insulating plate 30, that is, a portion where the thread groove 25 is formed on the outer peripheral surface, between the insulating plate 30 and the nut 32. The terminal piece 33 is an L-shaped terminal piece made of a conductive material that is inserted into the terminal 20a in a state that it is fitted onto the outside of the terminal 20a.A lead wire (not shown) connected to a liquid detection circuit (not shown) is connected to the terminal piece 33. The O-ring 29 is fitted onto the flange 26a of the spacer 26 and is compressed between the flange 23 of the first terminal 20a and the hill 4 of the mounting plate 3, so that the liquid does not flow into the hill. 4 to the ceiling side of the liquid storage container.

Incidentally, a terminal 20b is provided in addition to the terminal 20a in the hilly portion 4, but since the terminal 20b has the same shape and mounting method as the terminal 20a, the explanation thereof will be omitted.

34 is a clamp piece for clamping the lead wire 22;
The base 35 is fixed to the surface of the anti-bracket main body on the periphery of the mounting plate 3 by means such as spot welding.
Lead by appropriately bending a pair of wing pieces 36 and 37 of different lengths that are formed protrudingly on both side edges near one end! ! 22 is designed to be held.

Incidentally, reference numerals 38, 38, 38, 38 are mounting holes provided on the periphery of the mounting plate 3, through which bolts (not shown) for mounting the mounting plate 3 to the liquid storage container are inserted.

The rotating body holding hole 5 of the bracket main body 1 is made of an insulating material,
A substantially cylindrical rotating body 39 made of, for example, synthetic resin is inserted through the bracket main body l from the surface side. The rotating body 39
A pair of engaging pieces 40.40 are integrally formed on the circumferential surface of the approximately central part of the bracket body 1, and the engaging pieces 40.40 are perpendicular to the central axis and extend in opposite directions. It is brought into contact with the surface. A rotating arm locking groove 42 is formed in the end surface of the rotating body 39 on the side protruding from the back surface of the bracket main body l, passing through the center hole 41 of the rotating body 39 and crossing the end surface. Then, the connecting arm 44 of the rotating arm 43 bent into an L shape is press-fitted into the center hole 41 of the rotating body 39, and is also fitted into the center hole 41 of the driven rotating body, which will be described later, so that the rotating arm portion 45 is fitted into the rotating arm locking groove 42. This rotating arm portion 45 is connected to the bracket main body 1 at the intermediate portion.
When viewed from the back side, it is bent into a shape, and a float 46 is fixed to the tip. Incidentally, a rotation regulating piece 47, 47 is provided at the end of the bracket body 1 on the side of the scale mounting plate.
The rotating arm portion 45 is positioned within the range limited by the rotation regulating pieces 47 and 47, and when the liquid level is zero, the rotating arm portion 45 comes into contact with one of the rotation regulating pieces 47. contact,
When the container is almost full of liquid, the rotating arm portion 45 comes into contact with the other rotation regulating piece 47, so that the rotating arm 43
The rotation is restricted within a certain range. Further, a fitting protrusion 548 having a non-circular cross-sectional shape is formed approximately at the center of the end surface of the rotating body 39 on the side opposite to the rotational arm locking groove 42 .

Reference numeral 49 denotes a driven rotating body, which has a fitting recess 50 with a non-circular cross section formed on one end surface in the axial direction, and is rotatably fitted into the driven body holding hole 10 of the holding plate 8 at the center of the other end surface. A protrusion 51 having a circular cross section to be inserted is integrally provided. The driven rotating body 49 has the fitting protrusion 48 of the rotating body 39 fitted into the fitting recess 50, and the circular protrusion 51
is inserted into the driven body holding hole 10 from the inside of the holding plate 8, so that the driven rotating body 49 and the rotating body 39 can rotate integrally with each other between the bracket body 1 and the holding plate 8. maintained in the state. At the same time, the center hole 52 passing through the center of the driven rotating body 49 and the center hole 41 of the rotating body 39 are communicated with each other. The connecting arm 44 of the rotating arm 43 is press-fitted into these center holes 41 and 52.

Reference numeral 53 denotes a slider which rotates together with the rotation of the rotating body 39 so that its tip slides on the surfaces of the thick film resistors 11114A and 14B. 54 is a substantially circular base of the slider 53; 55 is a substantially rectangular sliding piece protruding from the periphery of the base 546; 56;
is a contact portion provided at the tip of the sliding piece 55, which is brought into contact with the thick film resistive films 14A, 14B.

A fitting protrusion 48 of the rotating body 39 is provided at the base 54 of the slider 53.
is inserted into the engagement hole 57, and the engagement projection 48 is inserted into the engagement hole 57 and inserted into the engagement recess 50 of the driven rotary body 49. As a result, the base portion 54 of the slider 53 is held between the rotating body 39 and the driven rotating body 4'9.

Note that a U-shaped notch 58 is formed in the contact portion 56,
The notch 58 divides the sliding piece 55 into an inner piece 59 and a U-shaped outer piece 60 that surrounds it, and the back side of the inner piece 59 and the outer piece 60, that is, the thick film resistor forming substrate 13 side. Contact points 61 and 62 are fixed at the center of the tip of the surface. Said inner piece 5
9 and the outer piece 60 are bent as appropriate so that the contacts 61 and 62 at the tips thereof come into elastic contact with the surfaces of the thick film resistive films 14A and 14B of the thick film resistor forming substrate 13.

Accordingly, when the rotating arm 43 rotates around the connecting arm portion 44 in accordance with the displacement of the liquid level, and the rotating body 39 rotates accordingly, the fitting protrusion 48 and the engaging hole combine the rotational forces with each other. 57 to the slider 53, and the slider 5
The contacts 61 and 62 at the third tip move on the surfaces of the thick film resistive films 14A and 14B while being in elastic contact with the surfaces.

A conductive element 63 is made of an elastic material and serves to electrically connect the slider 53 and the electrode 16a on the thick film resistance forming substrate 13, and its rectangular base 64 is connected to the insulating substrate. 11 with rivets. Reference numeral 65 indicates an electrode 16 of the thick film resistor forming substrate 13 on the base 64 of the conductor 63.
This is a connecting terminal that is formed in a protruding manner so as to extend to a point a, and its tip end is soldered to the electrode 16a. As described above, by this soldering, the upper right portion of the thick film resistor forming substrate 13 in FIG. 3 is fixed to the insulating substrate 11. Reference numeral 66 denotes an elastic contact piece extending from the base 64 of the conductive element 63 toward the rotating body 39. The elastic contact piece 66 has a U-shaped notch 67 at its tip, and the rotating body 39 passes between the notches 67. It is allowed to pass. Two holding plates 8 at the tip portions of the elastic contact piece 66 are located on both upper and lower sides of the rotating body 39.
Contact points 68 and 69 are formed in a embossed shape on each side surface, and by appropriately bending the elastic contact pieces 66 of the conductor 63, the contacts 68 and 69 are attached to the slider 53. It is made to come into elastic contact with the surface of the peripheral edge of the base portion 54 on the side of the bracket main body l, and the slider 53 and the electrode 16a of the thick film resistance forming substrate 13 are electrically connected by the connecting terminal 65.

Therefore, a rotating arm 43 is provided between the terminals 20a and 20b.
A variable resistor whose resistance changes according to the rotation of the liquid container is formed, and this variable resistor is connected to a liquid detection circuit provided outside the liquid container. Then, by detecting the resistance value of the variable resistor by the liquid detection circuit, the rotation angle of the rotation arm 43 and, by extension, the height of the liquid level are detected.

In the illustrated liquid level gauge, a pair of support pieces 6.6 are provided at positions opposite to each other across the rotating body holding holes 5 on both side edges of the bracket body 1, and extend perpendicularly to the surface side of the bracket body 1. The rotating body 39 is inserted into the rotating body holding hole 5 of the bracket main body 1 from the front side, and the retaining pieces 40 and 40 at the middle part of the rotating body 39 are inserted into the rotating body holding hole 5 of the bracket main body 1.
It is brought into contact with the surface. A driven rotating body 49 is disposed on the opposite side of the rotating body 39 from the bracket main body L, sandwiching the base 54 of the slider 53 that is fitted onto the fitting protrusion 48 of the rotating body 39. Fitting recess 50 of rotating body 49
By fitting the fitting protrusion 48 of the rotary body 39 into the base portion 54 of the slider 53, the base portion 54 of the slider 53 is held between the rotary body 39 and the driven rotary body 49.

In this state, the holding plate 8 is fixed to the tip of the support piece 6.6. Furthermore, the protrusion insertion holes 9.9 at both ends of the holding plate 8 are provided with caulking protrusions 7.
7.7.7 is inserted through the support plate 8 and the support piece 6
．． 6 and insert the protrusion 51 of the driven rotating body 49 into the driven body holding hole 10 of the holding plate 8.
．． By caulking 7, 7, the retaining plate 8 is attached to the support piece 6.
It is supported between 6 tips.

Therefore, the slider 53 is firmly held between the bracket body 1 and the holding plate 8 by the rotating body 39 and the driven rotating body 49, and is supported so as to rotate with the rotation of the rotating body 39. There is no risk that the holding plate of the bracket body 1 will be deformed to support the slider as in the conventional case, or that the slider will not rotate smoothly due to the deformation, and therefore the slider will not rotate smoothly. There is no need to provide any play to hold the child 53. Therefore, slider 5
The contact with the thick film resistive films 14A and 14B of No. 3 becomes unstable, and there is a risk that the measurement error will increase or the measurement will become impossible.

Modified Example FIG. 12 shows the main part of a modified example of the contact holding mechanism in a liquid level gauge using a thick film resistor according to the present invention.

In this modification, instead of the L-shaped terminal piece 33, a circuit mounting board 70 is held between the terminals 20a, 20b and the nuts 32, 32. Electronic parts such as resistors and capacitors are mounted on the circuit mounting board #; Since it has been
The space is filled with mold resin 71.

According to this modification, the anti-hill portion 4 of the mounting plate 3
Resistors, capacitors, and ICs are mounted on the circuit mounting board 70-A by filling the side with mold resin 71.
etc. can be protected from dust, water droplets, heat, etc.

Note that by implementing this modification, the mounting board area of the circuit mounting board 70 for the liquid detection circuit provided outside can be reduced, so the liquid detection circuit can also be made more compact.

Effects of the Invention As is clear from the above description, the contact holding mechanism in the liquid level gauge using the thick film resistor of the present invention is provided by attaching a portion of the contact portion to a bracket fixedly provided to the static body container as appropriate. Holding plates facing each other at a distance are fixed, and rotating body holding holes are formed in positions where the bracket and the holding plate face each other, respectively, and between the bracket and the holding plate, the rotating body holding holes of the bracket are formed. A transmission rotating body having an insertion portion rotatably inserted into the holding plate, and a driven rotating body having a fitting portion rotatably fitted into the rotating body holding hole of the holding plate, the contact end of which has a thick film. This is characterized in that the center of rotation of the slider, which rotates so as to come into sliding contact with the resistor, is sandwiched between the two rotating bodies.

Therefore, according to the present invention, the rotational center of the slider is held between the two rotating bodies between the mutually opposing portions of the bracket and the holding plate, and rotates with the rotation of the rotating bodies. Since the slider is held in such a manner that the contact pressure of the slider against the thick film resistor does not change, it is possible to always keep it constant.

[Brief explanation of the drawing]

3. Figure 1 is a longitudinal cross-sectional view showing an example of a contact holding mechanism in a level gauge using a conventional thick film resistor, and Figure 2 is an enlarged view showing the sliding surface of the thick film resistor in Figure 1. Figures 3 to 11
The figures show an example of the implementation of a contact holding mechanism in a liquid level type using the thick film resistor of the present invention, FIG. 3 is an exploded perspective view, and FIG.
The figure is an enlarged front view of the thick film resistor forming substrate, Figure 5 is a front view,
Fig. 6 is a plan view, Fig. 7 is an enlarged sectional view of the terminal section taken along line A-A in Fig. 3, Fig. 8 is a perspective view of the spacer provided in the terminal, and Fig. 9 shows the cord clamp section. FIG. 10 is an enlarged perspective view, FIG. 10 is a longitudinal cross-sectional view showing the main part, FIG. 11 is an enlarged perspective view of the main part, and FIG. 12 is an enlarged cross-sectional view showing a modification of the terminal attachment part. Explanation of symbols 1... Bracket, 5... Φ Rotating body holding hole, 8... Holding plate, lO◆... Rotating body holding hole, 14e... Thick film resistor, 39... Φ Transmission rotating body, 49...Followed rotating body, 5
1... Fitting part, 54 3... Slider, 54 Life φ/Rotation center part, 61.62.
...Contact end Fig. 5 Fig. 7 Fig. 2 Fig. 8 Fig. 9

Claims (1)

[Claims] A holding plate facing a part of the liquid container at an appropriate distance is fixed to a bracket fixedly provided to the liquid storage container, and
A rotating body holding hole is formed in each of the bracket and the holding plate at positions facing each other, and an insertion portion is rotatably inserted into the rotating body holding hole of the bracket between the bracket and the holding plate. A sliding member includes a transmission rotating body and a driven rotating body having a fitting portion that is rotatably fitted into the rotating body holding hole of the holding plate, and the sliding member rotates so that its contact end slides into contact with the thick film resistor. A contact holding mechanism in a liquid level gauge using a thick film resistor, characterized in that the center of rotation of the mover is sandwiched between the two rotating bodies.