JPH0690097B2 - Pattern resistor for output adjustment of load cell - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to patterned resistors used to regulate the output of load cells.

[Prior art]

As a method of compensating the temperature of the load cell span and the temperature of the zero point in which the strain gauge attached to the strain element of the strain element is incorporated in the Wheatstone bridge, many types of winding resistors with different resistance values have been used. There is also a method of preparing a film resistor and a film resistor and connecting these resistors for adjustment. However, this method has the drawback that many resistors with different resistance values must be prepared, and since the resistors are not in close contact with the strain cell of the load cell,
There is a drawback in that a thermal gradient is generated between the strain generating element and the output gradient of the load cell, which reduces the output accuracy. Further, it is difficult and time-consuming to select a predetermined resistor from many resistors and solder it.

Therefore, in recent years, in order to solve the above problems, patterned resistors for adjusting the load cell output have been developed. As an example thereof, the public utility model, Showa 58-104944, and JP-A-60-
There are those disclosed in Japanese Laid-Open Publication No. 57228 and Japanese Laid-Open Utility Model No. 56-144332.

2 to 4 are views showing the patterned resistor.

The load cell output adjusting resistor shown in FIG. 2 is provided with a pair of wire connecting portions 2 and 2 which are connected to a part of the terminal lead patterns 1 and 1 and face each other, and the wire connecting portions 2 and 2 each have an area. It has a structure in which different resistance value adjusting units 3-1, 3-2 ... 3-6 are connected, and when adjusting the resistance value, the resistance value adjusting units 3-1, 3-2. -6 is electrically removed, for example, a part 3-4a of the resistance value adjusting unit 3-4 is cut by a cutter to change the resistance value of the entire load cell output adjusting resistor.

The load cell output adjusting resistor shown in FIG. 3 is provided with a plurality of resistance adjusting portions 7 ... 7 having substantially the same area and having both ends connected by connecting portions 6, 6 between lead terminal patterns 5, 5. The resistance value between the lead terminal patterns 5 and 5 is changed by cutting off a part of the connection portions 6 and 6.

The load cell output adjustment resistor shown in FIG.
The connection patterns 12 to 15, the resistance correction units 16 to 19, and the additional resistance patterns 21 and 22 are provided, and the resistance value is obtained by cutting off the conduction unit 20 provided in the resistance correction units 16 to 19. Is made to change.

[Problems to be solved by the invention]

However, in the above-described conventional patterned resistor for adjusting the output of the load cell, there are drawbacks in that the number of adjustment points increases as the number of adjustment variations increases, and the number of adjustment variations decreases as the number of adjustment points decreases. Further, there is a drawback that it is difficult to restore the pattern once it is cut.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a pattern resistor for adjusting the output of a load cell, in which many adjustment variations can be obtained with a small number of adjustment points.

[Means for solving problems]

In order to solve the above problems, the present invention provides an insulating layer made of an insulating material and a pattern resistor for adjusting the output of a load cell, which is composed of a pattern resistor made of a metal foil formed on the insulating layer. 2 the resistance provided with a plurality of pattern resistor electrically connected in series ^0, 2 ^1, 2 ^2,
...... formed to a value comparable to the weight of 2 ^n, electrically said adjusting part pattern to the adjusting part pattern provided with a regulating portion pattern electrically shorting the two terminal portions of the plurality of patterns resistor An adjustment point is provided to change the series resistance values of a plurality of pattern resistors connected in series by cutting with a weight of 2 ⁰ , 2 ¹ , 2 ² , ... 2 ^n. It is characterized in that a number or symbol comparable to the weight is displayed in its vicinity.

[Action]

By configuring as the output adjustment pattern resistor load cells described above, by cutting the plurality of adjustment locations while looking at the adjustment locations or numbers or symbols provided near the resistance of the resistor 2 ^0, Since the value changes with a value that is comparable to the weight of 2 ¹ , 2 ² , ..., 2 ⁿ , by combining these, many adjustment variations can be obtained as described later.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) and 1 (b) are views showing the structure of an output adjusting pattern resistor of a load cell according to the present invention.
Is a plan view, and FIG. 6B is a sectional view taken along line AA of FIG.

As shown in the figure, the pattern resistor for adjusting the output of the load cell has an insulating layer 21 (thickness of about 75
μ) on which patterned pattern resistors 22 and 23 (thickness about 35 μ) made of a metal foil such as a copper material are provided.
The pattern resistor 22 includes lead terminal patterns 22-1, 22-2,
22-3, 22-4 and the resistance value adjusting patterns 22A, 22B are integrally formed, and the pattern resistor 23 is a lead terminal pattern 23-1, 23-2, 23-3, 23-4. , 23-5,23-6
And the resistance value adjustment patterns 23A, 23B, and 23C are integrally formed. The lead terminal pattern 22-1 and the lead terminal pattern 22-2, and the lead terminal pattern 22-3 and the lead terminal pattern 22-4 are short-circuited by adjusting part patterns 24 and 25, respectively. Further, the lead terminal pattern 23-1, the lead terminal pattern 23-2, the lead terminal pattern 23-3, the lead terminal pattern 23-4, and the lead terminal pattern 23-5.
The lead terminal pattern 23-6 and the lead terminal pattern 23-6 are short-circuited by adjusting part patterns 26, 27 and 28, respectively. The lead terminal patterns 22-1 to 22- are provided on the pattern resistors 22 and 23.
An insulating material laminate or resist layer 29 is provided except for the portions of 4,23-1 to 23-6 and the adjustment portion patterns 24 to 28.

In the output resistor pattern resistor of the load cell having the above structure, the lead terminal pattern 22-4 and the lead terminal pattern
Terminals of the strain gauge are connected between the terminals 23-5 and 23-5, and terminals forming a bridge are connected to the lead terminal patterns 22-1 and 23-2. That is, the lead terminal patterns 22-4 and 23-5 also serve as the strain gauge lead wiring patterns, and the lead terminal patterns 22-1 and 23-2 also serve as the bridge wiring patterns.

FIG. 5 is a diagram showing weighting of resistance values of the resistance value adjustment patterns 22A, 22B and the resistance value adjustment patterns 23A, 23B, 23C. As shown, pattern resistor 22 and strain gauge
A series circuit is formed by R0 and the pattern resistor 23. In the series circuit, when the adjustment portion patterns 24, 25, 26, 27, 28 of the pattern resistors 22, 23 are not removed, the respective resistance value adjustment patterns 22A, 22B, 23A, 23B, 23C are the adjustment portion patterns 24, Since they are short-circuited by 25, 26, 27 and 28, the resistance values of the pattern resistors 22 and 23 are so small that they can be ignored and can be regarded as substantially zero.

Here, by removing the adjusting portion pattern 26, the resistance value adjusting pattern 23A is inserted into the circuit, and the adjusting portion pattern 27
Resistance value adjustment pattern 23B is inserted by removing the, resistance value adjustment pattern 23C is inserted by removing the adjustment portion pattern 28, resistance value adjustment pattern 22B is inserted by removing the adjustment portion pattern 25, Further, by removing the adjusting portion pattern 24, the resistance value adjusting pattern 22A is inserted. Resistance adjustment pattern 23A, 23B, 23C, 2
2A and 22B have resistance values of "2 ¹ ", "2 ² ",
The resistance values are weighted so that they are multiplied by "2 ⁸ ,""2 ^4, " and "2 ¹⁶ ". That is, when the adjustment part patterns 26, 27, 24, 28, 25 are removed, the resistance value of the load cell output adjustment pattern resistor changes by 2 ¹ , 2 ² , 2 ⁴ , 2 ⁸ , 2 ¹⁶ times.

As described above, the resistance weights “1”, “2”, which are changed by removing the adjustment pattern 26, 27, 24, 28, 25,
"4", "8", "16" are replaced with lead terminal patterns 23-1, 23-3, 22-2, 23- as shown in FIG. 1 (a) and FIG.
By printing on 6,22-3, even if an unskilled worker handles it, the adjustment work can be performed accurately and promptly.

FIG. 6 is a plan view showing an output adjusting pattern resistor of another load cell according to the present invention. As shown in the figure, the output adjusting pattern resistor has a structure in which a pattern resistor 32 made of a metal foil and a conductor pattern 33 also made of a metal foil are provided on an insulating layer 31 made of an insulating material. The pattern resistor 32 has a shape in which lead terminal patterns 32-1, 32-2 and resistance value adjustment patterns 32A, 32B, 32C, 32D are integrally formed, and resistance value adjustment patterns 32A, 32B, 32C, 32D. Each of the terminals has a concave thin constricted adjustment pattern 34, 35,
Shorted at 36,37. Resistance adjustment pattern 32A, 32B, 3
2C and 32D have different pattern widths, and are weighted so that their resistance values change by a factor of “2 ¹ ”, “2 ² ”, “2 ⁴ ”, and “2 ⁸ ”.

In the pattern resistor for adjusting the output of the load cell having the above configuration, by removing each of the adjusting part patterns 34, 35, 36, 37, the lead terminal patterns 32-1 and 32-2 are respectively provided with 2 ¹ , 2 ^2, 2 ^4, the resistance value with a weight of 2 ^8-fold is to be inserted.

FIG. 7 is a plan view showing an output adjusting pattern resistor of another load cell according to the present invention, and the output adjusting pattern resistor shown in FIG. 6 shows an example including four lead terminal patterns. However, the pattern resistor for output adjustment shown in FIG. 7 has two lead terminal patterns. As shown in the figure, a pattern resistor 42 made of a metal foil is provided on an insulating layer 41 made of an insulating material. The pattern resistor 42 is similar to the resistor pattern 32 of FIG. 6 in that the lead terminal patterns 42-1, 42-2 and the resistance value adjusting pattern 42A,
42B, 42C, 42D are integrally formed, and the terminal portions of the resistance value adjusting patterns 42A, 42B, 42C, 42D are short-circuited by adjusting portion patterns 44, 45, 46, 47, respectively. The resistance value adjustment patterns 42A, 42B, 42C, 42D have different pattern widths, and the resistance values thereof are “2 ¹ ”, “2 ² ”, “2 ⁴ ”,
Similar to the pattern resistor 32 shown in FIG. 6, weighting is performed so as to change by a factor of "2 ⁸ ".

Further, by removing the respective adjusting unit patterns 44, 45, 46, 47, respectively between the lead terminal patterns 42-1 and 42-2, 2 ^1, 2 ^2, 2 ^4, 2 ⁸ times the weight of the It is the same as the resistor pattern 32 shown in FIG. 6 in that the resistance value it has is inserted.

In the load cell output adjusting pattern resistor shown in FIGS. 6 and 7, four adjustments of weighting 1, 2, 4, and 8 provide 15 adjustment variations.

FIG. 9 (a) is an enlarged view showing the shapes of the adjusting portion patterns of the patterned resistors 22 and 23 shown in FIG. 1 and the patterned resistor 42 shown in FIG. As shown in the figure, the adjusting portion pattern for short-circuiting the lead terminal pattern 54 and the lead terminal pattern 55 is a shape in which two concave thin constricted patterns 52 and 53 are arranged with a convex protruding pattern 51 interposed therebetween. In the case of removing the adjusting portion pattern, if a cutter or the like is hooked on the tip of the convex protruding portion 51 and peeled off, the protruding portion is removed from the adjusting portion pattern as shown in FIG.

As shown in FIG. 10 (a), the adjustment portion pattern is formed by short-circuiting the lead terminal patterns 54 and 55 with one concave pattern 56. When the adjustment portion pattern is removed, the adjustment portion pattern has a concave shape. A cutter is put in the pattern 56 part to cut this part. When the cutter is strongly pressed, the pattern 56 bites into the insulating layer 57 and its tip contacts the strain element 58 as shown in FIG. There is. Further, even if the cutting is performed with a cutter, the distance between the cuts is small, so that there is a possibility that the separated portions may come into contact again. On the other hand, by forming the adjusting portion pattern as shown in FIG. 9 (a), the convex protruding portion 51 can be easily removed without affecting other portions as described above. As the work becomes easier, the clearance after separation is wider, and the reliability is also higher.

FIG. 11 is a perspective view showing an example of a case where the load cell output adjusting pattern resistor is mounted on the load cell flexure element. Strain gauges 62-1 and 62-2 and strain gauges 62-3 and 62-4 (both not shown) are attached on the strain generating portions 61A, 61B, 61C and 61D of the strain generating body 61. The adjusting pattern resistors 63 and 64 (not shown) having the structure shown in FIG. 1 are provided between the strain-flexing portion 61A and the strain-generating portion 61B and between the strain-generating portion 61C and the strain generating portion 61D.
Further, the adjusting resistors 65 and 66 shown in FIG. 7 are provided on the side wall 61E of the hollow portion of the flexure element 61. The strain gauge 62-1 and the adjustment pattern resistor 63 are connected, and the strain gauge 62-3 and the adjustment pattern resistor 64 (both not shown) are connected.
In the figure, 67 is a cable for guiding the output of the load cell to the outside, and a plurality of core wires of the cable have a wiring pattern substrate 68 provided on the side portion on the supporting end side of the flexure element 61.
Connected to.

FIG. 12 is a wiring diagram showing a configuration of a circuit constituting the load cell. In the figure, the strain gauge 62-1 and the adjusting resistor 63 are connected (explained in FIG. 1, both terminals of the strain gauge 62-1 are connected between the lead terminal patterns 22-4 and 23-5. Adjustment resistor 64 and the strain gauge 62-3 are connected. Output terminals of the adjusting resistors 63, 64 (first
Explaining in the figure, lead terminal pattern 22-1 and lead terminal pattern 23-2) Strain gauges 62-2, 62-4 are connected to a bridge, and a fixed resistor is provided between connection points C1 and C2 of the bridge. Connect R1 and the adjustment resistor 65, connect the fixed resistor R2 and the adjustment resistor 66 between the connection points C1 and C4, and further connect the connection point C2.
Fixed resistors R3 and R4 are connected between C4 and C4, and a series resistor composed of the fixed resistor R5 and the adjusting resistor 68 and an adjusting resistor 69 are connected in parallel at the tip thereof. Here, as the adjusting resistors 63, 64 and the adjusting resistor 69, a 4-terminal adjusting resistor as shown in FIG. 1 or 6 is used.
For 65, 66, 68, 2-terminal adjusting resistors as shown in FIG. 7 are used.

In the load cell circuit configured as described above, a DC or AC voltage is applied between the terminals T1 and T2 of the adjusting resistor 69 (between the lead terminal pattern 22-4 and the lead terminal pattern 23-5 in the case of FIG. 1). Is applied to obtain an output from between the terminals T3 and T4 connected to the connection points C1 and C3. Further, the adjusting resistors 65 and 66 are zero balance adjusting resistors or resistors for zero point compensation with respect to temperature, and the adjusting resistors 63 and 64 are resistors for zero point compensation with respect to temperature or zero balance adjusting resistor. Further, the fixed resistors R3 and R4 are span compensation resistors for temperature, the adjustment resistor 68 is fine adjustment resistor or span adjustment resistor for temperature span compensation, and the adjustment resistor 69 is span compensation for temperature. It becomes a fine adjustment resistance or a span adjustment resistance.

In the pattern resistor for adjusting the output of the load cell shown in FIGS. 1, 6, and 7, the adjustment pattern resistor is manufactured by using nickel, platinum, or copper having a large temperature coefficient as the metal foil of the pattern resistor. In this case, since the temperature coefficient is large, it is excellent as an adjusting resistor for zero point compensation with respect to temperature or an adjusting resistor for span correction with respect to temperature. Further, when a patterning resistor for adjustment is manufactured by using constantan or manganin having a small temperature coefficient as the metal foil of the pattern resistor, it is excellent as an adjusting resistor for zero balance adjustment and span adjustment because of the small temperature coefficient. Will be things.

FIG. 8 shows the adjustment resistor 6 in the circuit shown in FIG.
It is a figure which shows the example of output adjustment of a load cell by 3,64 (The thing for the adjustment pattern resistor used is what is shown in FIG. 1 is used.).

That is, FIG. 8 shows an example of the relationship between the location of the cut adjustment portion pattern when a temperature difference of 20 ° C. is applied and the correction amount (%) of the correction value of the output voltage at that time. However, as the pattern resistors for output adjustment, the pattern resistors 22 and 23 are made of copper foil having a thickness of 35 μ, and the width of the elongated portion of the resistance value adjustment pattern 23A corresponding to the weight “1” is 0.4 mm and length. 2.7 mm,
The width of the elongated portion of the resistance value adjustment patterns 23A, 22A, 23C, 22B corresponding to the weights “2”, “4”, “8”, and “6” is 0.2 m.
m, total length 2.7 mm, 5.4 mm, 10.8 mm, 21.6 mm were used. In addition, the load cell strain gauges 62-1
The resistance value of 62-4 was 350Ω each, and the output of the load cell was 1 mV / V at the rated load (that is, the ratio of the output voltage to the input voltage was 1/1000).

As shown in the figure relates to zero for temperature changes of the load cell, respectively 2 ^0, 2 ^1, 2 ^2, 2 ^8, 2 ⁴ adjustments of the weighted 5 positions by appropriately selected and cut into , The adjustment value VA can be adjusted within the range of 1.51 × 10 ^-2 % to 46. × 10 ^-2 %, and 31 adjustments of adjustment numbers 1 to 31 can be performed.
If the required correction value VA is obtained by measurement, the controller pattern to be cut is determined from the cutting adjustment data shown in FIG. For example, in Fig. 8, assuming that the zero point change with respect to the temperature of the load cell gives a temperature difference of + 20 ° C and it is + 0.4% with respect to the output of 1 mV / V, do not change it with respect to the temperature. In order to do this, the adjustment part beside the lead terminal pattern on which the weights 2, 8 and 16 of the adjustment pattern resistor 63 to which the strain gauge 62-1 that receives compressive strain (see FIG. 12) is connected is displayed. Pattern 27, 28, 25 (see Fig. 1) is hooked with a sharp tip like a cutter knife, and when the convex projections are hooked up and turned up, both ends are broken and that part To be separated. In this way 39.7
It is possible to correct the zero for a temperature of 7 × 10 ^-2 %. The remaining error of 0.23 × 10 ^-2 % is well within the allowable range of use, so no problem occurs. Further, if the −0.4% zero point changes when a temperature difference of + 20 ° C. is given, then the weights of the adjustment pattern resistor 64 connected to the strain gauge 62-3, which is subject to tensile strain, are 2,8,16. The lead terminal patterns 23-3, 23-6, 22-3 on which the numbers are displayed are cut off from the adjustment patterns 23, 28, 25 (see FIG. 1) on the horizontal side.

In addition, if the maximum adjustment range is 46.85 × 10 ^-2 %, most of the load cells can be adjusted with about 80%, but the remaining 20% can be adjusted with 32 (2 ⁵ ), It suffices to provide a resistance value adjusting pattern having a weight adjusting part pattern such as 64 (2 ⁶ ).

FIG. 13 is a diagram showing an example in which an adjustment pattern resistor is built into a flexible wiring board (wiring pattern board of FIG. 11).
Is equivalent to 68). In the figure, a wiring pattern 71, adjustment pattern resistors 72 and 73 (corresponding to the adjustment pattern resistors 63 and 64 in the example of FIG. 12), and an adjustment pattern are formed on a flexible substrate 70 made of a resin material or the like. Pattern resistor 74
(It corresponds to the adjustment pattern resistor 69 in the example of FIG. 12)
And each pattern of the fixed resistor 75 for adjustment is given.

By configuring the load cell output adjusting pattern resistor as described above, the following is possible.

(1) As shown in FIG. 8, the maximum adjustment variation can be obtained with the fewest adjustment points by selectively combining the adjustment points consisting of the adjustment pattern. For example 1,
31 variations can be obtained at 5 adjustment points of 2,4,8,16. Further, from this fact, the table shown in FIG. 8 is stored in the computer in advance, and the correction value AV shown in FIG. Correction value AV
Thus, it is possible to obtain the combination CW of adjustment points.

(2) Since the adjustment point is short-circuited with the two lead terminal patterns integrally and separated by the concave narrow constricted pattern portion, even if the concave pattern is accidentally separated, it is easy to use the solder bridge or the like. Can be undone.

(3) Solder is applied to the pattern resistance portion when the bridge portion of the pattern resistor, which is erroneously cut off, is soldered by applying a laminate or a resist to the portions other than the lead terminal pattern and the adjustment portion pattern portion. There is no problem and soldering can be done easily and safely. In addition, by applying a laminate or resist, water resistance, moisture resistance, chemical resistance,
It is possible to obtain a load cell that is excellent in weather resistance and has little secular change.

(4) As shown in FIG. 9 (a), the shape of the adjusting portion pattern is such that two concave thin constricted patterns 52, 53 are arranged with a convex protruding pattern 51 interposed therebetween. When the adjustment portion pattern is removed, a cutter or the like can be hooked on the tip of the convex protrusion 51 to easily peel off without affecting other portions, and the reliability of separation is increased.

(5) As shown in FIG. 1, the weight of the resistance value is displayed as a number on the lead terminal pattern portion of the adjustment pattern resistor, so that the adjustment work of the load cell can be performed accurately without requiring skill. It becomes possible.

(6) Since the adjustment pattern resistor also serves as the lead terminal of the strain gauge and the bridge wiring pattern, the load cell assembling work can be simplified and the cost can be reduced. Also,
The layout on the load cell surface can be functionally arranged.

〔The invention's effect〕

As described above, according to the present invention, the following excellent effects can be obtained.

(1) The series resistance of the series-connected plurality of pattern resistor 2 ^0, 2 ^1, 2 ^2, because it is possible to change the value of combining the weight of ...... 2 ^n, the lowest adjustment point Gives the maximum adjustment variation.

(2) When cutting by adjusting a plurality of adjustment points,
As shown in FIG. 8, since the resistance value is predicted in advance, the adjustment work becomes easy.

(3) Further, since the adjustment point is a concave narrow constriction formed on the adjustment pattern and capable of electrically cutting the adjustment pattern, for example, the concave narrow constriction is erroneously cut. Even in the case, it can be easily restored by a solder bridge or the like.

By laminating or resisting the insulating material on the upper portion of the pattern resistor excluding the adjustment portion and the output terminal portion, the solder bridge can easily and safely perform the adjustment portion which is accidentally separated. Further, by laminating or resisting, a load cell having excellent water resistance, moisture resistance, chemical resistance, weather resistance and the like and having little secular change can be obtained.

By displaying a number or symbol comparable to the weight at the adjustment point, the adjustment work can be performed easily and accurately.

Since the concave thin constricted pattern that short-circuits two or more terminals at the adjustment point is provided at two points with the convex protrusion sandwiched, removal of the adjustment point does not affect other parts and is easy. The reliability of separation can be increased.

[Brief description of drawings]

1 (a) and 1 (b) are views showing the structure of a pattern resistor for adjusting the output of a load cell according to the present invention. FIG. 1 (a) is a plan view and FIG. 1 (b) is the same figure (a). A-A line cross-sectional view,
2 to 4 are diagrams showing a conventional patterned resistor, and FIG. 5 is a diagram showing weighting of resistance values of the resistance value adjustment patterns 22A, 22B and the resistance value adjustment patterns 23A, 23B, 23C,
FIGS. 6 and 7 are plan views each showing an output adjustment pattern resistor of another load cell according to the present invention, and FIG. 8 is an example of load cell output adjustment using the adjustment pattern resistor according to the present invention. FIG. 9 (a) shows the patterned resistors 22 and 23 shown in FIG. 1 and the patterned resistor 4 shown in FIG.
2 is an enlarged view showing the shape of the adjusting portion pattern of FIG. 2, FIG. 10B is a diagram showing the removed protruding protrusion pattern, FIG. 10A
Shows a shape of another adjusting portion pattern, FIG. 11B is a sectional view showing a state in which the adjusting portion pattern is cut, and FIG. Perspective view showing an example of the case where the container is mounted,
FIG. 12 is a block diagram showing the circuit configuration of the load cell shown in FIG. 11, and FIG. 13 is a diagram showing an example in which an adjustment pattern resistor is built in a flexible wiring board. In the figure, 21 ... Insulating layer, 22,23 ... Pattern resistor, 24-2
8 ... Control pattern, 19 ... Laminate or resist layer, 31 ... Insulating layer, 32 ... Resistor pattern, 33 ... Conductor pattern, 41 ... Insulating layer, 42 ... Resistor pattern.

Continuation of the front page (56) Reference JP-A-53-75462 (JP, A) JP-A-53-75463 (JP, A) JP-A-58-208633 (JP, A) JP-A-57-196124 (JP , A) Actual development Sho 58-104940 (JP, U)

Claims (4)

[Claims] 1. A pattern resistor for adjusting the output of a load cell, comprising: an insulating layer made of an insulating material; and a pattern resistor made of a metal foil formed on the insulating layer. Are connected in series to provide a plurality of them, and the resistance value thereof is formed to a value comparable to the weight of 2 ⁰ , 2 ¹ , 2 ² , ... 2 ⁿ , and both terminal portions of the plurality of pattern resistors are formed. A series resistance value 2 ⁰ , 2 ¹ , of the plurality of pattern resistors connected in series by providing an adjusting part pattern that electrically shorts and electrically cutting the adjusting part pattern to the adjusting part pattern A pattern for adjusting the output of a load cell, characterized in that an adjustment point for changing the combined value with the weights of 2 ² , ... 2 ⁿ is provided, and a number or symbol comparable to the weight is displayed at or near the adjustment point. Resistor. 2. The adjusting part is a concave narrow constriction formed in the adjusting part pattern and capable of electrically cutting the adjusting part pattern. ) A pattern resistor for adjusting the output of the load cell described in the item. 3. The insulating material laminate or resist is applied to at least the upper portion of the adjusting portion pattern excluding the adjusting portion and the output terminal portion, as claimed in claim 1. Pattern resistor for adjusting the output of the load cell. 4. The adjusting portion is provided at two places with a concave thin constriction formed on the adjusting portion pattern and capable of electrically cutting the adjusting portion pattern, sandwiching a convex protrusion. A pattern resistor for adjusting the output of a load cell according to claim (1), (2) or (3).