JP2023038661A - converter - Google Patents

Abstract

To provide a converter capable of easily exchanging cables.SOLUTION: A converter comprises a detection unit for converting acceleration or load to electric output and a cable connected to the detection unit. The detection unit includes a body part, a strain gauge mounted on the body part, and a substrate mounted on the body part and electrically connected to the strain gauge. The cable is electrically connected to the substrate by soldering, the body part contains a substrate mounting unit having a mounting surface on which the substrate is mounted, the substrate mounting unit has an internal space, an introduction opening communicating with the internal space, and a lead-out opening formed on the mounting surface and communicating with the internal space. The cable is wired to be introduced into the internal space through the introduction opening and led out from the internal space through the lead-out opening.SELECTED DRAWING: Figure 9

Description

The present invention relates to converters.

Transducers are known that detect acceleration or load by converting the acceleration or load into an electrical output. Patent Literature 1 discloses an example of an acceleration transducer. This acceleration transducer is used, for example, in automobile crash tests. This acceleration transducer comprises a detector that converts acceleration into an electrical output, and a cable connected to the detector. The detection unit includes a strain gauge that converts changes in acceleration into an electrical output, and a substrate that is electrically connected to the strain gauge. The cable is electrically connected with the substrate.

Japanese Patent No. 4574324

In the acceleration transducer, for example, only the cable out of the detector and the cable may be damaged. In such cases, it is preferable to be able to replace the cable. Patent Document 1 does not particularly mention such a point of the acceleration transducer. Note that such a problem is not limited to acceleration transducers, but also occurs in load transducers (load cells), for example.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a converter in which cables can be easily replaced.

A converter according to a first aspect of the present invention is a converter comprising a detector that converts acceleration or load into an electrical output, and a cable that is connected to the detector, wherein the detector includes a main body a strain gauge attached to the main body; and a substrate attached to the main body and electrically connected to the strain gauge, wherein the cable is electrically connected to the substrate by soldering, The body portion includes a board mounting portion having a mounting surface to which the board is mounted, and the board mounting portion includes an internal space, an introduction opening that communicates with the internal space, and an introduction opening that communicates with the internal space. and the cable is routed to be introduced into the interior space through the introduction opening and out of the interior space through the exit opening.

According to this converter, when the cable is damaged, the cable is separated from the main body by removing the solder and pulling out the cable so that the tip of the cable passes through the lead-out opening, the internal space, and the lead-in opening in that order. can. Therefore, the cable can be easily replaced.

A converter according to a second aspect of the present invention is the converter according to the first aspect, and has a plurality of the cables and a plurality of the lead-out openings, the plurality of the cables comprising the plurality of the lead-out openings. is wired to branch to

According to this converter, the degree of freedom of cable wiring is enhanced.

A converter according to a third aspect of the present invention is the converter according to the first aspect or the second aspect, wherein the plurality of lead-out openings face each other via the internal space.

According to this converter, since the plurality of lead-out openings are separated, the plurality of cables can be easily branched.

A converter according to a fourth aspect of the present invention is the converter according to any one of the first to third aspects, wherein the substrate is a flexible substrate.

According to this converter, the substrate can be bent and arranged, so that the detecting section can be made compact.

A converter according to a fifth aspect of the present invention is the converter according to any one of the first to fourth aspects, wherein the board mounting portion has at least four mounting surfaces.

According to this converter, the degree of freedom in arranging the substrate is increased.

With the converter according to the invention, the cable can be easily replaced.

The top view of the converter of embodiment. The converter main body of FIG. 1, and the enlarged view of the periphery. FIG. 3 is a cross-sectional view taken along line D3-D3 in FIG. 2; FIG. 2 is a perspective view of the main body of the converter of FIG. 1 as viewed from above; The perspective view which looked the main-body part of FIG. 4 from the lower side. The top view of the main-body part of FIG. FIG. 7 is a cross-sectional view taken along line D7-D7 in FIG. 6; FIG. 7 is a cross-sectional view taken along line D8-D8 of FIG. 6; FIG. 2 is a perspective view of a board mounting portion of the converter body of FIG. 1 and its surroundings; FIG. 2 is a plan view of a flexible substrate included in the transducer body of FIG. 1; FIG. 2 is a front view of a lid included in the transducer body of FIG. 1; FIG. 12 is a cross-sectional view taken along line D12-D12 in FIG. 11;

A converter according to an embodiment of the present invention will be described below with reference to the drawings.

<1. Overall Configuration of Converter>
FIG. 1 is a plan view of the converter 10 of this embodiment. FIG. 2 is an enlarged view of the converter main body 20 of the converter 10 and its periphery. 3 is a cross-sectional view taken along line D3-D3 in FIG. 2. FIG. The transducer 10 is an acceleration transducer that converts acceleration into electrical output, or a load transducer (load cell) that transforms load into electrical output. Acceleration transducers are used, for example, in automobile crash tests, structural impact strength measurement tests, or machine vibration measurement tests. Load transducers are used, for example, in puppet robot joints or industrial robot arms. The transducer 10 of this embodiment is, for example, an acceleration transducer that is used in automobile crash tests and detects the acceleration of the automobile in the sensitivity direction XA (see FIG. 8).

The converter 10 includes a converter body 20, a connector 30, and a cable 40. As shown in FIG. The converter body 20 and the connector 30 are electrically connected via a cable 40 . The connector 30 is connected with arbitrary hardware, such as a universal recorder, depending on the application of the converter 10 . The converter body 20 includes a detector 50, a case 60, and a cover 70 for the converter (hereinafter referred to as "cover 70").

<2. Configuration of Detection Unit>
As shown in FIG. 3 , the detection section 50 includes a body section 80 , a flexible substrate 90 , a strain gauge 100 and a weight 110 .

FIG. 4 is a perspective view of the main body 80 viewed from above. FIG. 5 is a perspective view of the main body 80 viewed from below. 6 is a plan view of the body portion 80. FIG. 7 is a cross-sectional view taken along line D7-D7 in FIG. 6. FIG. FIG. 8 is a cross-sectional view taken along line D8-D8 in FIG.

The body portion 80 has a gauge attachment portion 81 to which the strain gauge 100 is attached, a substrate attachment portion 82 to which the flexible substrate 90 is attached, and a connection portion 83 that connects the gauge attachment portion 81 and the substrate attachment portion 82 . In the present embodiment, the body portion 80 is integrally formed with the gauge mounting portion 81, the board mounting portion 82, and the connecting portion 83. As shown in FIG.

Any material can be selected to form the body portion 80 . The body portion 80 is preferably made of a material with a low Young's modulus. When the body portion 80 is made of a material with a low Young's modulus, the thickness of the body portion 80, particularly the gauge mounting portion 81, can be increased, so that the strain gauge 100 can be arranged far from the neutral bending axis XO (see FIG. 4). . Therefore, even if the amount of deflection of the gauge mounting portion 81 is approximately the same, a larger strain can be generated. Materials with a low Young's modulus are, for example, aluminum alloys, magnesium alloys, or titanium alloys. In this embodiment, the material forming the body portion 80 is an aluminum alloy. More specifically, the aluminum alloy forming main body 80 is extra super duralumin with a specific gravity of 2.8.

The shape of the gauge mounting portion 81 can be arbitrarily selected as long as the shape allows the strain gauge 100 to be mounted. In this embodiment, the gauge mounting portion 81 has a shape similar to a cylinder. The gauge mounting portion 81 preferably has a length LB in a direction XB (see FIG. 8) orthogonal to the sensitivity direction XA in a front view, which is equal to or greater than the length LA of the sensitivity direction XA. Since the rigidity in the direction XB orthogonal to the sensitivity direction XA is high, the acceleration sensitivity in the direction XB orthogonal to the sensitivity direction XA is difficult to increase. Therefore, the acceleration in the sensitivity direction XA can be preferably detected. In this embodiment, the length LB is equal to the maximum length LA _MAX and longer than the minimum length LA _MIN .

The gauge mounting portion 81 has a first recessed portion 81A and a second recessed portion 81B recessed in the sensitivity direction XA (see FIG. 8). The number of first recesses 81A and second recesses 81B formed in gauge mounting portion 81 can be arbitrarily selected. In this embodiment, the gauge attachment portion 81 is formed with two first recesses 81A and four second recesses 81B.

The first concave portion 81A has a shape extending in the longitudinal direction of the gauge mounting portion 81 . The first recess 81A is formed from one end 81X of the gauge mounting portion 81 to the other end 81Y. A strain gauge 100 (see FIG. 3) is attached to the bottom surface 81AX of the first recess 81A. In this embodiment, the strain gauge 100 is attached to a position closer to one end 81X of the bottom surface 81AX of the first recess 81A.

The second recessed portion 81B is recessed toward the center of the gauge mounting portion 81 from the bottom surface 81AX of the first recessed portion 81A in the sensitivity direction XA. Therefore, the bottom surface 81BX of the second recess 81B is positioned closer to the center of the gauge mounting portion 81 than the bottom surface 81AX of the first recess 81A in the sensitivity direction XA. Since the rigidity in the sensitivity direction XA is further reduced, the acceleration in the sensitivity direction XA can be preferably detected. The four second recesses 81B are formed substantially centrally in the longitudinal direction of the gauge mounting portion 81 . As shown in FIG. 4, the two second recesses 81B face each other via the first recess 81A. As shown in FIG. 5, another two second recesses 81B face each other via another first recess 81A. Therefore, as shown in FIG. 8, the cross-sectional shape passing through the second recessed portion 81B in the direction perpendicular to the longitudinal direction of the gauge mounting portion 81 is a cross.

The board mounting portion 82 is exposed from the case 60 when the gauge mounting portion 81 and the connecting portion 83 are accommodated in the case 60 . The board mounting portion 82 is covered with a heat-shrinkable tube 210 (see FIG. 3). The board mounting portion 82 can be arbitrarily selected as long as it has a shape that allows the flexible board 90 to be mounted. In this embodiment, the board mounting portion 82 has a shape similar to a hollow rectangular parallelepiped. The substrate attachment portion 82 has an internal space 82X (see FIG. 7), an attachment surface 82Y to which the flexible substrate 90 is attached, and a bottom surface 82Z. The mounting surface 82Y has a pair of first mounting surfaces 82A and a pair of second mounting surfaces 82B.

The pair of first mounting surfaces 82</b>A are smooth surfaces forming the upper and lower surfaces of the gauge mounting portion 81 . The pair of first mounting surfaces 82A face each other via an internal space 82X. The pair of second mounting surfaces 82B are curved surfaces forming side surfaces of the board mounting portion 82 . The pair of second mounting surfaces 82B face each other via an internal space 82X.

FIG. 9 is a perspective view of the board mounting portion 82 and its surroundings with the heat-shrinkable tube 210 omitted. In the converter 10 of this embodiment, a converter main body 20 and a plurality of cables 40 are electrically connected. The plurality of cables 40 are bundled and covered with a heat-shrinkable tube 220 (see FIG. 3) except for a predetermined portion including the distal end 40A.

The board mounting portion 82 has an introduction opening 82ZX for introducing the cable 40 into the internal space 82X, and a pair of extraction openings 82BX for guiding the cable 40 from the internal space 82X. The introduction opening 82ZX is formed in the bottom surface 82Z of the board mounting portion 82. As shown in FIG. The shape of the introduction opening 82ZX can be arbitrarily selected as long as the shape allows insertion of a plurality of cables 40 . In this embodiment, the shape of the introduction opening 82ZX is a circle. The shape of the introduction opening 82ZX may be an ellipse or a triangle or more polygon.

The lead-out openings 82BX are formed in the pair of second mounting surfaces 82B of the board mounting portion 82, respectively. A pair of lead-out openings 82BX face each other via an internal space 82X. The shape of the lead-out opening 82BX can be arbitrarily selected as long as the shape allows insertion of a plurality of cables 40 . In this embodiment, the outlet opening 82BX has a circular shape. The shape of the lead-out opening 82BX may be an ellipse or a triangle or more polygon.

A plurality of cables 40 are introduced into the internal space 82X from the introduction opening 82ZX and branched. Therefore, the degree of freedom in wiring the cable 40 is high. In the internal space 82X, some of the cables 40 lead out from lead-out openings 82BX formed in one of the pair of second mounting surfaces 82B, and the tip 40A is soldered to the electrode pattern 93 of the flexible substrate 90. attached. In the internal space 82X, another portion of the plurality of cables 40 is led out from a lead-out opening 82BX formed in the other of the pair of second mounting surfaces 82B, and the tip 40A is connected to the electrode pattern 93 of the flexible substrate 90. and soldered. Since the plurality of cables 40 are wired in this manner, predetermined portions including the tips 40A of the plurality of cables 40 are bent in an S shape in plan view. Therefore, even if a force is applied to separate the cables 40 from the flexible board 90 , the friction between the cables 40 and the board mounting portion 82 causes the cables 40 to move away from the flexible board 90 . deviating from is suppressed.

As shown in FIG. 4, FIG. 5, or the like, the connecting portion 83 has a cylindrical shape, and is formed with a pin insertion hole 83A and a wiring hole 83B. The connecting portion 83 is housed in the case 60 (see FIG. 3). The pin insertion hole 83A is a hole that is formed in the side surface of the connecting portion 83 and penetrates the connecting portion 83 in the radial direction. A pin 230 (see FIG. 3) is inserted into the pin insertion hole 83A. The pin 230 has a function of restraining the body portion 80, in other words, a function of positioning the body portion 80 in the direction in which the neutral axis XO extends and in the direction of rotation about the neutral axis XO. Therefore, the detection unit 50 can be positioned in the direction in which the neutral axis XO extends and in the direction of rotation about the neutral axis XO. Further, since the sensitivity of acceleration in the direction XB (see FIG. 8) orthogonal to the sensitivity direction XA is unlikely to increase, the acceleration in the sensitivity direction XA can be preferably detected. The wiring hole 83B is a hole penetrating through the connecting portion 83 in the thickness direction. An electric wire 240 (see FIG. 9) that electrically connects the strain gauge 100 and the flexible substrate 90 is inserted into the wiring hole 83B.

<3. Configuration of flexible substrate>
FIG. 10 is a plan view of the flexible substrate 90. FIG. A plurality of electrode patterns 93 are formed on the surface of the flexible substrate 90 . Flexible substrate 90 has two first portions 91 and three second portions 92 . The two first portions 91 and the three second portions 92 are connected. Therefore, the flexible substrate 90 can be arranged so as to be wound around the substrate attachment portion 82 . One of the two first portions 91 is attached to the upper first attachment surface 82A of the board attachment portion 82 . The other of the two first portions 91 is attached to the lower first attachment surface 82A of the board attachment portion 82 . Of the three second portions 92 , the two second portions 92 having only one electrode pattern 93 are attached to one second attachment surface 82</b>B of the board attachment portion 82 . Of the three second portions 92, one second portion 92 formed with a plurality of electrode patterns 93 is attached to the other second attachment surface 82B of the board attachment portion 82. As shown in FIG. Since the flexible substrate 90 can be bent and disposed on the substrate attachment portion 82, the detection portion 50 can be configured to be small.

<4. Configuration of Strain Gauge>
Any known strain gauge can be used as the strain gauge 100 of the present embodiment depending on the intended use of the transducer 10 . In this embodiment, strain gauge 100 is a semiconductor strain gauge. In this embodiment, the strain gauges 100 are attached to the bottom surfaces 81AX of the two first recesses 81A of the gauge attachment portion 81, respectively. In other words, the transducer 10 of this embodiment has two strain gauges 100 . The number of strain gauges 100 included in the transducer 10 may be one, or three or more. For example, if the transducer 10 has four strain gauges 100, the output is further enhanced.

<5. Structure of Weight>
The weight 110 shown in FIG. 3 is attached to one end 81X (see FIG. 4) of the gauge attachment portion 81. As shown in FIG. Therefore, the acceleration in the sensitivity direction XA can be preferably detected. The shape of the weight 110 can be arbitrarily selected. In this embodiment, the shape of the weight 110 is an annular ring having a hole into which the gauge mounting portion 81 is inserted. Any material can be selected for the weight 110 . From the viewpoint of suitably detecting the acceleration in the sensitivity direction XA, the material forming the weight 110 is preferably a metal having a higher specific gravity than the metal forming the main body portion 80 . More preferably, the ratio RA of the specific gravity of the metal forming the weight 110 to the specific gravity of the metal forming the main body 80 is 6 or more. In this embodiment, the material forming the weight 110 is a tungsten alloy with a specific gravity of 16.9, and the ratio RA is 6. By using a metal with a large specific gravity as the material for the weight 110, the thickness and radial dimension of the weight 110 can be reduced. Since the weight 110 can be arranged near the opening 62 of the case 60, for example, when a plurality of transducers 10 are attached to the same object to be measured in order to detect triaxial acceleration, the weight 110 of the plurality of transducers 10 position can be brought closer. Therefore, the accuracy of acceleration detection is enhanced.

<6. Configuration of case>
The case 60 shown in FIG. 3 and the like has, for example, a hollow rectangular parallelepiped shape, and has a case inner space 60A that accommodates part of the detection unit 50 . Any material can be selected to form the case 60 . In this embodiment, the material forming the case 60 is austenitic stainless steel. The material forming the case 60 may be, for example, martensitic or ferritic stainless steel. A through hole 61 (see FIG. 2) is formed through the case 60 in the upper surface of the case 60 . A gap around the strain gauge 100 in the case inner space 60A is filled with a liquid such as silicone oil that functions as a damper through the through hole 61 . A gap around the strain gauge 100 in the case inner space 60A may be filled with a gas such as an inert gas such as argon and nitrogen through the through hole 61 . A cylindrical collar 120 is attached in the vicinity of the connecting portion 83 of the main body portion 80 . Therefore, the volume of the liquid functioning as a damper filled in the case inner space 60A can be reduced.

<7. Composition of Lid>
Lid 70 is attached to case 60 so as to close opening 62 of case 60 . By attaching the lid 70 to the opening 62 of the case 60, the case inner space 60A is sealed. For example, when the temperature rises in the operating environment of the converter 10, the internal pressure of the case 60 rises and the air inside the case 60 expands. Therefore, the case 60 may be damaged. Further, when the internal pressure of the case 60 increases, there is a risk that the liquid such as silicone oil filled in the case internal space 60A may leak. In this embodiment, the lid 70 is configured so as to prevent the case 60 from being damaged and the liquid filled in the case inner space 60A from leaking out. Lid 70 is fitted into step 63 formed in opening 62 of case 60 . The lid 70 has an inner lid 71 and an outer lid 72 .

11 is a front view of the inner lid 71. FIG. 12 is a cross-sectional view taken along line D12-D12 in FIG. 11. FIG. The inner lid 71 has a sealing portion 71A and a reinforcing portion 71B. The material forming the sealing portion 71A is rubber. The shape of the sealing portion 71A is a thin plate. The shape of the sealing portion 71A in a front view can be arbitrarily selected as long as it can close the opening 62 (see FIG. 3). In this embodiment, the shape of the sealing portion 71A in a front view is a circle. The shape of the sealing portion 71A in a front view may be an ellipse or a polygon with a quadrangle or more. In order to configure the inner lid 71 to be thin, the thickness HA of the sealing portion 71A is preferably within the range of 0.04 mm or more to 0.08 mm, for example.

The reinforcing portion 71B is joined to the sealing portion 71A. The material forming the reinforcing portion 71B is metal. Since the reinforcing portion 71B made of metal is joined to the sealing portion 71A made of rubber, the rigidity of the inner lid 71 is increased. In addition, since the inner lid 71 can be easily handled, the inner lid 71 can be easily attached to the opening 62 when the transducer 10 is manufactured. The reinforcing portion 71B is joined to the stepped portion 63 of the opening 62 . The method of joining the reinforcement portion 71B and the step 63 is, for example, soldering or adhesion. The material forming the reinforcing portion 71B is determined based on the method of joining the reinforcing portion 71B and the step 63 together. When the method of joining the reinforcing portion 71B and the step 63 is soldering, the material forming the reinforcing portion 71B is, for example, brass or copper. When the method of bonding the reinforcing portion 71B and the step 63 is adhesion, the material forming the reinforcing portion 71B is any metal.

The reinforcing portion 71B has a joint portion 71BX joined to the sealing portion 71A and a through hole 71BY formed in the joint portion 71BX. The shape of the joint portion 71BX can be arbitrarily selected. From the viewpoint of easily manufacturing the inner lid 71, it is preferable that the contour shape of the joint portion 71BX is substantially the same as the contour shape of the sealing portion 71A. In this embodiment, the contour shape of the joint portion 71BX is a circle. Therefore, the reinforcing portion 71B has a ring shape as a whole with a through hole 71BY formed in the center.

The area of the through hole 71BY can be arbitrarily selected. When the internal pressure of the case 60 rises and the air in the case 60 expands, the sealing portion 71A deforms so as to swell to the side opposite to the opening 62 of the case 60, and the volume of the case 60 substantially increases. A state is formed. Therefore, the area of the through-hole 71BY is larger than the area of the joint 71BX so that a larger portion of the sealing portion 71A can expand when the air in the case 60 expands. preferable.

The thickness HB of the reinforcing portion 71B is preferably within a range of 0.10 mm or more to 0.18 mm, for example. The thickness HB of the reinforcing portion 71B is preferably greater than the thickness HA of the sealing portion 71A. The ratio RB of the thickness HB to the thickness HA is preferably determined based on the thinness and rigidity of the inner lid 71, for example. A preferred minimum value for the ratio RB is, for example, 125%. When the ratio RB is 125% or more, the rigidity of the inner lid 71 is high. A preferred maximum value for the ratio RB is, for example, 450%. When the ratio RB is 450% or less, the inner lid 71 can be made thin. A preferable range of the ratio RB is, for example, 125% or more and 450% or less.

The method of manufacturing the inner lid 71 includes, for example, a first step, a second step, a third step, and a fourth step. In the first step, the metal rectangular bar forming the reinforcing portion 71B is cut into a predetermined size. In the second step, the rubber forming the sealing portion 71A is integrally formed with the metal rectangular bar cut in the first step. In the third step, a metal square with rubber integrally molded is etched into a ring shape. In a fourth step, the metal ring is punched out with the rubber.

The outer lid 72 is attached outside the inner lid 71 so as to be in contact with the inner lid 71 . The outer lid 72 is not joined with the inner lid 71 . Any material can be selected for the outer lid 72 . In this embodiment, the outer lid 72 is made of rubber. The shape of the outer lid 72 can be arbitrarily selected. In this embodiment, the shape of the outer lid 72 is a disc. Since the opening 62 of the case 60 is closed by the inner lid 71 and the outer lid 72, the case 60 is highly sealed.

<8. Effect of the present embodiment>
According to the converter 10 configured as described above, the following effects can be obtained.

<8-1>
In the converter 10, for example, only the cable 40 out of the detector 50 and the cable 40 may be damaged. In such cases, it is preferable that the cable 40 be replaceable. According to the converter 10 of this embodiment, when the cable 40 is damaged, the solder is removed, and the cable 40 is removed so that the tip 40A of the cable 40 passes through the lead-out opening 82BX, the internal space 82X, and the lead-in opening 82ZX in this order. The cable 40 can be separated from the main body 80 by pulling out the . Therefore, the cable 40 can be easily replaced.

<8-2>
Since the plurality of cables 40 are wired so as to branch to the plurality of lead-out openings 82BX, the degree of freedom in wiring the cables 40 is enhanced.

<8-3>
A plurality of lead-out openings 82BX face each other via an internal space 82X. Since the plurality of lead-out openings 82BX are separated, the plurality of cables 40 can be easily branched.

<8-4>
Since the flexible substrate 90 can be bent and arranged, the detection unit 50 can be made small.

<8-5>
Since the board mounting portion 82 has at least four mounting surfaces 82Y, the flexible board 90 can be arranged more freely.

<9. Variation>
The above embodiments are illustrative of the forms that the converters of the present invention can take, and are not intended to limit the forms. A transducer according to the invention can take forms different from those illustrated in the embodiments. One example is a form in which part of the configuration of the embodiment is replaced, changed, or omitted, or a form in which a new configuration is added to the embodiment. Some examples of modifications of the embodiment are shown below.

<9-1>
In the above-described embodiment, the board mounting portion 82 of the main body portion 80 has two lead-out openings 82BX, but the board mounting portion 82 has one or three or more lead-out openings 82BX. good too.

<9-2>
In the above-described embodiment, the board mounting portion 82 of the main body portion 80 has one introduction opening 82ZX, but the board mounting portion 82 may have a plurality of introduction openings 82ZX.

<9-3>
Although the detection unit 50 has the flexible substrate 90 in the above embodiment, the detection unit 50 may have a rigid type substrate or a rigid/flexible type substrate.

REFERENCE SIGNS LIST 10: Converter 40: Cable 50: Detector 80: Body 82X: Internal space 82Y: Mounting surface 82BX: Lead-out opening 82ZX: Introduction opening 90: Flexible substrate 100: Strain gauge

Claims (5)

A converter comprising a detection unit that converts acceleration or load into an electrical output, and a cable connected to the detection unit,
The detection unit is
a main body;
a strain gauge attached to the body;
a substrate attached to the main body and electrically connected to the strain gauge;
the cable is electrically connected to the substrate by soldering;
the body portion includes a substrate attachment portion having an attachment surface to which the substrate is attached;
The substrate mounting portion has an internal space, an introduction opening that communicates with the internal space, and an outlet opening that is formed in the mounting surface and communicates with the internal space,
The cable is routed such that it is introduced into the interior space through the introduction opening and exits the interior space through the exit opening. having a plurality of cables and a plurality of outlet openings;
2. The transducer of claim 1, wherein a plurality of said cables are wired to branch to a plurality of said lead-out openings. 3. The transducer according to claim 2, wherein the outlet openings are opposed across the internal space. A transducer according to any one of claims 1 to 3, wherein said substrate is a flexible substrate. A transducer according to any one of claims 1 to 4, wherein said board mounting portion has at least four said mounting surfaces.

Images