JP2015222185A - Measurement element fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement element fixture capable of bringing a measurement element into tight contact with a measuring object without using an adhesive.SOLUTION: A thermistor 16 that comes into contact with a power terminal table 18 attached on a substrate 20 and measures the temperature is accommodated in a main body 2. The main body 2 is attached on the substrate 20. The front surface of the main body is open, and the thermistor 16 is brought into contact with the power terminal table 18 via the opening. A pressing member disposed on the back wall 12 side of the main body 2 presses the thermistor 16 on the power terminal table 18.

Description

  The present invention relates to a measuring element attachment that attaches to a substrate a measuring element that contacts the object to be measured on the substrate and measures the property of the object to be measured in contact with the object to be measured.

  As described above, for example, a contact-type temperature sensitive element such as a thermistor is used as a measurement element that measures the property of the measurement object by contacting the measurement object. Conventionally, as a technique for attaching this temperature sensitive element to an object to be measured, for example, as disclosed in Patent Document 1, there has been an technique of adhering the temperature sensitive element to an object to be measured using an adhesive.

JP 2002-84028 A

  However, when the temperature sensitive element is bonded to the object to be measured with an adhesive, bonding work is required and workability is poor. For example, if most of the work to attach a component to a board is a work to fit the part to the board, after the work to fit the object to be measured as the part to the board, the work to bond the temperature sensitive element is performed. In addition, when an operation of fitting another component to the board is performed, the workability is poor because the bonding operation is interposed in the fitting operation. In addition, since an adhesive is interposed between the temperature sensing element and the object to be measured, a thermal resistance is generated by this adhesive, and the property of the object to be measured such as the temperature of the object to be measured is accurately measured. I can't.

  An object of this invention is to provide the measuring element fixing tool which can closely_contact | adhere a measuring element to a to-be-measured object, without using an adhesive agent.

  The measuring element fixture of one embodiment of the present invention has a main body. The main body contains a measuring element, for example, a temperature sensitive element. This temperature sensitive element measures the property of the measured object in contact with the measured object attached on the substrate. The main body is attached to the substrate. One surface of the main body portion is opened, and the measurement element is brought into contact with the portion to be measured through the opening. A pressing member is provided on the surface of the main body portion opposite to the opening across the measuring element, and presses the measuring element toward the object to be measured. It is desirable that the main body portion and the pressing member are integrally molded, for example, with a synthetic resin.

  In the measuring element fixture thus configured, the pressing member presses the measuring element accommodated in the measuring element against the object to be measured, so that the measuring element can be brought into close contact with the object to be measured without using an adhesive. it can.

  The main body portion may have a surface facing the substrate, and an inclined portion that contacts the substrate may be provided on the surface. This inclined portion is a part of the surface that contacts the substrate, for example, in a state where the front end is in contact with the substrate, by contacting the surface facing the substrate and the substrate, the main body portion is brought to the measured object side. Tilt. Therefore, the inclined portion is formed away from a part of the surface that contacts the substrate, for example, the front end.

  If comprised in this way, a main-body part will incline to a to-be-measured object side by presence of an inclination part, and a measurement element can be stuck by a to-be-measured object.

  Attachment of the main body to the substrate can be performed by a claw. The claw can be provided on a protruding portion of a columnar fixture provided on the surface of the main body portion facing the substrate and protruding the substrate to the opposite side of the main body portion. If comprised in this way, a fixture can be attached to a board | substrate by inserting a fixing | fixed part in a board | substrate, and workability | operativity can be improved. In particular, when the object to be measured and other parts are attached to the substrate only by the insertion work, the workability is remarkably improved.

  Further, the claw may be formed to be inclined so that the main body portion is inclined to the measured object side. If comprised in this way, a temperature sensing element can be more closely stuck to a to-be-measured object by inclining a main-body part to a to-be-measured object.

  The pressing member extends from at least one of the main body portions on both ends of the measuring element on the direction side substantially orthogonal to the direction of passing through the opening and the pressing member of the measuring element toward the center of the measuring element. A flexible member having an enormous portion that presses the measuring element toward the object to be measured can be provided at the tip of the arm.

  If comprised in this way, a measurement element can be firmly stuck to a to-be-measured object by presence of a huge part.

  Alternatively, the pressing member extends to the center side of the measuring element from each of the main body portions on both ends of the measuring element on the direction side orthogonal to the direction of passing through the opening and the pressing member of the measuring element. It can be set as the flexible member which each has the enormous part which presses the said measuring element to the said to-be-measured object side at the front-end | tip of the arm.

  If comprised in this way, a measurement element can be closely_contact | adhered to a to-be-measured object equally from the center both sides of a measurement element.

  The main body has a through-hole through which a binding member that passes through the opening and the pressing member and can bind the measurement element can be inserted in a portion other than the portion in which the measurement element is accommodated. can do.

  With this configuration, the binding member can be inserted into the through hole and the measurement element can be fixed to the main body. Therefore, in the case of a measurement element that can be contacted in a non-contact manner, for example, a temperature sensing element, It becomes possible to measure temperature.

  As described above, according to the measuring element fixture according to the present invention, the measuring element can be brought into close contact with the object to be measured without using an adhesive, so that the bonding work becomes unnecessary and the working efficiency is improved. Can do. Furthermore, for example, when a temperature sensitive element is used as the measuring element, the temperature can be accurately measured without being affected by the thermal resistance of the adhesive.

It is a vertical side view of the state which made the measuring element contact | adhere to the to-be-measured object by the measuring element fixing tool of the 1st Embodiment of this invention. It is a front view of the measuring element fixture of FIG. It is a left-right side view of the measuring element fixing tool of FIG. It is a rear view of the measuring element of FIG. It is a bottom view of the measuring element fixture of FIG. It is a top view of the measuring element fixture of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a front view of the measuring element fixture of the 2nd Embodiment of this invention. It is sectional drawing which follows the CC line of FIG. It is a top view of the measuring element fixture of the 3rd Embodiment of this invention. It is sectional drawing which follows the DD line | wire of FIG. It is sectional drawing equivalent to FIG. 12 of the measuring element fixing tool of the 4th Embodiment of this invention.

  A measuring element fixture according to a first embodiment of the present invention includes a measuring element, for example, a contact-type temperature sensitive element, specifically a thermistor, and a measured object, for example, a power supply terminal block or a power output terminal block of a power supply device. (Hereinafter referred to as a power supply terminal block) to monitor abnormal heat generation due to poor connection of lead wires to the power supply terminal block.

  As shown in FIG. 2, the measuring element fixture has a main body 2. The main body 2 is formed in a substantially rectangular parallelepiped shape, for example, by synthetic resin, and has an upper wall 4, a lower wall 6, side walls 8, 10 and a back wall 12. A front surface facing the back wall 12 is opened. A space surrounded by the upper wall 4, the lower wall 6, the side walls 8, 10 and the back wall 12 serves as a housing portion 14. As shown in FIG. 1, as shown in FIG. An element, specifically, the thermistor 16 is accommodated. The thermistor 16 has, for example, a length dimension slightly shorter than the dimension between the side walls 8 and 10, a height dimension slightly shorter than the dimension between the upper wall 4 and the lower wall 6, and a width dimension of the upper walls 4 and 6. It is a substantially columnar shape having a slightly short width dimension, and has a flat contact surface on the opening side on the front side of the main body 2. This contact surface is in contact with an object to be measured, for example, the power terminal block 18 through the opening on the front side of the main body 2. The power terminal block 18 is mounted on a substrate 20 such as a printed circuit board.

  As shown in FIG. 4, the back wall 12 has a substantially rectangular window 22 cut out, and the arm 26 of the pressing member 24 extends linearly from the edge on the side wall 8 side of the window 22 to the vicinity of the center of the housing portion 14. An enormous portion 28 is formed near the tip of the arm 26. The enormous portion 28 protrudes from the arm 26 so as to protrude toward the opening side on the front side and enters the accommodating portion 14. As shown in FIG. 7, the back side of the enormous portion 28 is formed in a concave shape. Since this measuring element fixture is made of synthetic resin as described above, the arm 26 of the pressing member 24 has flexibility. As shown in FIG. 1, when the thermistor 16 comes into contact with the power supply terminal block 18 with the fixing element fixture attached to the substrate 20, the arm 26 and the enormous portion 28 are pushed toward the back wall 12 by the thermistor 18, The enormous part 28 presses the vicinity of the center of the back surface of the thermistor 16 toward the power terminal block 18 by the reaction force.

  As shown in FIGS. 2, 3, 7, and 8, the side wall 10 is formed with a groove 30 that allows the accommodating portion 14 to communicate with the outside world, and the lead wire of the thermistor 16 is connected to the measuring element via the groove 30. It is pulled out of the fixture and connected to an appropriate location on the substrate 20. Further, as shown in FIG. 6, a notch 32 is formed near the center of the accommodating portion 14 on the back wall 12 side of the upper wall 4. Via this notch 32, it is possible to observe the pressing state of the pressing member 24 against the thermistor 16 from the upper part of the measuring element fixture.

  A lower protrusion 34 having a substantially rectangular parallelepiped shape is formed on the lower surface of the lower wall 6 so as to protrude downward. As shown in FIG. 1, the lower protrusion 34 is in contact with the substrate 20. The lower protrusion 34 is open on the front side and is hollow inside, and as shown in FIG. 8, a through-hole 36 penetrating the back wall 12 is formed. The through hole 36 is formed in a size that allows a binding member, for example, a binding band, to pass through.

  As shown in FIG. 5, an inclined portion 38 is formed at the center of the edge on the back wall 12 side of the lower surface of the lower protruding portion 34. As shown in FIG. 8, the inclined portion 38 is formed in a right triangle shape, and the right-angled portion coincides with the edge of the lower protrusion 34 on the back wall 12 side, and further away from the right-angled portion. An inclined surface is formed obliquely upward from the apex at the position toward the front side. As shown in FIG. 1, when the front end of the lower surface of the downward projecting portion 34 comes into contact with the substrate 20, the apex of the inclined portion 38 comes into contact with the substrate 20, and the entire measuring element fixture is moved toward the power supply terminal block 18 side. Tilt down diagonally.

  Plate-shaped fixtures 40 and 42 extend vertically downward from the lower wall 10 located on both sides of the lower protrusion 34 so as to coincide with the outer surfaces of the side walls 8 and 10 downward. doing. The fixtures 40 and 42 are also made of synthetic resin and have flexibility. Claws 44 and 46 projecting outward are formed at the lower ends of the fixtures 40 and 42, respectively. As shown in FIG. 1, the upper surfaces of the claws 44, 46 are in contact with the lower surface of the substrate 20 with the fasteners 40, 42 inserted through the fixing tool through holes formed in the substrate 20. Thus, it is formed to engage with the substrate 20. The fixing tool through-holes are formed so that the fixing tools 40 and 42 pass smoothly, but the claws 44 and 46 do not pass as they are. As shown in FIG. When the inclined surfaces formed on the outer surface sides of the claws 44 and 46 come into contact with each other, the fixtures 40 and 42 pass by being bent inward.

  As shown in FIGS. 3A and 3B, the upper surfaces of the claws 44 and 46 are formed so as to be inclined obliquely downward from the front surface side to the rear surface side of the measuring element fixture. The entire upper surface of the measuring element fixture is also inclined obliquely downward toward the power terminal block 18 side by contacting the upper surface with the lower surface of the substrate 20 in a horizontal state as indicated by a broken line in FIG.

  As shown in FIGS. 3A and 3B, the wing bodies 48 and 50 extend further rearward from the back wall 12 side of the side walls 8 and 10, and positioning portions 52 are respectively provided at the lower portions of the tips. , 54 are formed. These positioning portions 52 and 54 are formed in a columnar shape and are formed in parallel with the fixtures 40 and 42. As shown in FIG. 1, the positioning portions 52 and 54 are inserted into positioning through holes formed in the substrate 20 to position the measuring element fixture on the substrate 20.

  In the measuring element fixture configured as described above, as shown in FIG. 1, the thermistor 16 is accommodated in the accommodating portion 14, the positioning portions 52, 54 are inserted into the positioning through holes of the substrate 20, and the fixture 40 and 42 are inserted into the through holes for the fixture. At this time, since the thermistor 16 is in contact with the power supply terminal block 18, the pressing member 24 is pressed toward the back wall 12, and the pressing member 24 has flexibility. Presses the thermistor 16 toward the terminal block 18, and the thermistor 16 comes into close contact with the power supply terminal block 18. No adhesive is used for this adhesion. In addition, since the entire measuring element fixture is inclined toward the power terminal block 18 due to the inclination of the inclined portion 38 and the upper surfaces of the claws 40 and 42, the degree of adhesion can be further increased.

  In this way, the thermistor 16 can be brought into close contact with the power terminal block 18 simply by fitting the measuring element fixture to the substrate 20 without using an adhesive. Work such as application and pasting of the agent is unnecessary, and work efficiency can be improved. In addition, since the adhesive is not applied to the thermistor 16, the thermistor 16 can accurately measure the temperature of the power terminal block 18 without being affected by the thermal resistance of the adhesive.

  Further, in this element fixing tool, since the through hole 36 for the binding band is provided, the thermistor 16 is surrounded and bound by the binding band inserted through the through hole 36 for the binding band, In this bound state, if the fixtures 40 and 42 and the positioning portions 52 and 54 are used to attach to the substrate 20 in the vicinity of the power supply terminal 18, the same measuring element fixture and the thermistor 16 are used to Ambient temperature can also be measured.

  The measurement element fixture of the second embodiment is shown in FIGS. In the measurement element fixture of this embodiment, the configuration of the pressing member 24a is different from that of the measurement element fixture of the first embodiment, and a lead wire retaining member 56 is newly provided in the groove 30. Since the other configuration is the same as the configuration of the first embodiment, the same portions are denoted by the same reference numerals and the description thereof is omitted.

  In the pressing member 24a, arms 26a and 26a extend from the edges of the side walls 8 and 10 in the window 22 of the back wall 12 toward the center of the accommodating portion 14, respectively, and enormous portions 28a and 28a are respectively provided at the tip portions thereof. It is provided. When the arm 26 is extended only from one side as in the first embodiment and the enormous portion 28 is provided at the pointed end, one end of the thermistor 16 is located on the front side of the measuring element fixture, There is a possibility of inclining so that the other end is located on the back wall 12 side. In order to improve this point, arms 26a and enormous portions 28a are provided on both sides of the window 22 so that the thermistor 16 is in close contact with the power supply terminal block 18 without tilting.

  The stoppers 56 are projections formed in a small rectangular parallelepiped shape, for example, and are provided on the edge of the groove 30 on the accommodating portion 14 side so as to protrude into the groove 30 with a plurality of, for example, two intervals facing each other. It has been. These retaining members 56 bite into the lead wires and prevent the lead wires from coming out of the grooves 30.

  A measuring element fixture according to a third embodiment of the present invention is shown in FIGS. In the measurement element fixture of this embodiment, the arms 26a and 26a are extended from the side edges 8 and 10 of the window 22 toward the center side, respectively, in the same manner as the measurement element fixture of the second embodiment. The point which formed the hemispherical enormous part 28b between the front-end | tip parts differs from the measuring element fixing tool of 2nd Embodiment. Since other configurations are the same as those of the measurement element fixture of the second embodiment, the same portions are denoted by the same reference numerals, and description thereof is omitted. In addition, the back side of the enormous portion 28b is formed with a recess in a weight saving reservoir.

  The measurement element fixture of the third embodiment can also be brought into close contact with the power supply terminal block 18 without inclining the thermistor 16 like the measurement element fixture of the second embodiment.

  FIG. 13 shows a measuring element fixture according to the fourth embodiment. In this measuring element fixture, the enormous part 28c is different from the enormous part 28b of the measuring element fixture of the third embodiment, and the back side of the enormous part 28c is formed flat without providing a recess on the back side. Is different. Since other configurations are the same as those of the measurement element fixture of the third embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted. The measurement element fixture of the fourth embodiment can also be brought into close contact with the power supply terminal block 18 without inclining the thermistor 16 as in the measurement element fixture of the third embodiment.

  In each of the above embodiments, the thermistor is used as the measurement element. However, other contact type measurement elements that need to be measured in contact with the object to be measured may be used. In each of the above-described embodiments, the main body 2 has a rectangular parallelepiped shape because of the use of the thermistor 16, but a body corresponding to the shape of the measurement element to be used can be used. If it is plate-shaped, an annular peripheral wall covering the periphery of the measurement element and a disk-shaped back wall formed integrally with the peripheral wall so that the disk-shaped measurement element can be accommodated inside It is possible to use one having a front surface opened.

  In each of the above embodiments, the through-hole 36 for the binding band is provided in the lower protrusion 34. However, if the measurement element is not attached by the binding band, the through-hole 36 is unnecessary. In some cases, the lower protrusion 34 is not necessary. Further, the positioning portions 52 and 54 may not be necessary depending on circumstances, and in this case, the wing bodies 48 and 50 are also unnecessary, and the measuring element fixing tool can be further downsized.

  In each of the above embodiments, the inclined portion 38 is provided and the upper surfaces of the claws 44 and 46 are inclined in order to incline the measuring element fixing tool toward the power terminal block 18 side. However, only one of them may be provided. Or, if necessary, both can be removed. In addition, the inclined portion 38 has a right-side triangular shape, but any other shape, for example, a rectangular parallelepiped shape, can be used as long as the end of the lower protrusion 34 on the back wall 12 side can be lifted from the substrate 20. Can also be used.

2 Body 16 Thermistor (measuring element)
18 Power terminal block (object to be measured)
20 Substrate 24 Pressing member

Claims (7)

A measuring element that contacts the object to be measured attached on the substrate and measures the property of the object to be measured is housed inside and attached to the substrate, and one surface is opened, through this opening A main body for bringing the measuring element into contact with the measured part;
A pressing member that is provided on the surface of the main body on the opposite side of the opening across the measuring element, and presses the measuring element toward the object to be measured;
Measuring element fixture having.   The measuring element attachment according to claim 1, wherein the main body portion has a surface facing the substrate, is provided on the surface so as to contact the substrate, and the main body portion is inclined toward the object to be measured. A measuring element fixture having an inclined portion to be moved.   3. The measuring element mounting tool according to claim 1, wherein the body portion is attached to the substrate by attaching the substrate to a columnar fixture provided on a surface of the body portion facing the substrate, opposite to the body portion. A measuring element mounting tool which is formed by projecting to the side and engaging a claw provided on the projecting portion with a surface of the substrate opposite to the main body.   The measuring element attachment according to claim 3, wherein the claw is formed so as to be inclined so as to incline the main body portion toward the object to be measured.   5. The measuring element mounting tool according to claim 1, wherein the pressing member is located on both ends of the measuring element on a direction side substantially orthogonal to a direction passing through the opening and the pressing member of the measuring element. A measuring element mounting tool, which is a flexible member having an enormous portion that presses the measuring element toward the object to be measured at the tip of an arm extending toward the center of the measuring element from at least one of the portions.   5. The measuring element mounting tool according to claim 1, wherein the pressing member is located at both end portions of the measuring element on a side perpendicular to a direction passing through the opening and the pressing member of the measuring element. A measuring element mounting tool, which is a flexible member having a huge portion that presses the measuring element toward the object to be measured at the tip of an arm extending from the respective parts to the center side of the measuring element.   The measuring element attachment according to any one of claims 1 to 6, wherein the main body portion penetrates in a direction passing through the opening and the pressing member in a portion other than a portion in which the measuring element is accommodated, and the measuring element A measuring element mounting tool having a through-hole through which a bundling member for bundling can be inserted.

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