JP6572544B2 - Terminal block and temperature controller - Google Patents

Description

  The present invention relates to a terminal block mounted on an outer edge side of a printed board and a temperature controller using the terminal block.

  Conventionally, temperature controllers provided in various sizes according to standards and the like have been used (see Patent Document 1). As such a temperature controller, a display panel for displaying measured values and set values provided on the front surface side of the casing, and a rear panel of the casing, which is connected to a thermocouple or heater via a lead wire or the like. Some have terminal blocks.

  The terminal block includes a metal connection terminal connected to an external terminal such as a crimp terminal and a base on which the connection terminal is fixed. The connection terminal has a lead terminal disposed inside the housing. The lead terminal is passed through a hole formed in the printed circuit board, and in this state, is fixed by soldering to the printed circuit board. That is, the terminal block is inserted and mounted on the printed board.

JP 2007-34776 A

  In the above-described insertion mounting, in order to pass the lead terminal through the hole of the printed board, it is necessary to form the lead terminal so as to protrude laterally from the base. For this reason, the printed circuit board and the base are arranged in the thickness direction of the printed circuit board, and there is a problem that the dimension in the thickness direction becomes large and bulky. As a result, there is a problem in that the terminal block is restricted in layout, and particularly in a small-sized temperature controller, the number of terminal blocks installed in parallel is reduced.

  The present invention has been made in view of such a point, and it is an object of the present invention to provide a terminal block and a temperature controller that can suppress bulkiness in the thickness direction of the printed circuit board when mounted on the printed circuit board. To do.

The terminal block of the present invention includes a base disposed on the outer edge side of a predetermined printed circuit board, at least one connection terminal held on the base and connected to the predetermined external terminal, and an outer periphery of the printed circuit board. A mounting portion capable of sandwiching the edge side from the thickness direction, and the connection terminal is provided on the printed circuit board so as to be surface-mountable, and the mounting portion is a width of the base that serves as a sandwiching direction of the mounting portion. A plurality of the mounting portions are provided side by side in the direction, and the mounting portion includes a conductor portion that is a part of the connection terminal and is in contact with the printed board, and a sandwiching portion that sandwiches the conductor portion and the printed board. And a supported portion that contacts a support surface that supports the connection terminal on the base, and a pair of lead end portions that are provided to be connected to both ends of the supported portion, respectively .

  According to this configuration, since surface mounting is adopted, the connection terminal can be mounted on the printed circuit board without being formed so as to protrude from the base as in insertion mounting. Therefore, even if the portion to be soldered to the printed circuit board in the connection terminal is formed within the width of the base, the soldering can be performed, and in this state, the printed circuit board can be contained within the width of the base. it can. As a result, in the state where the terminal block is mounted on the printed board, the dimension in the thickness direction can be reduced by at least the thickness of the printed board. Thereby, the freedom degree of the layout in a terminal block can be raised, and many installation numbers of the terminal block arranged in parallel by a limited dimension can be ensured.

  The temperature controller of the present invention is a temperature controller comprising a terminal block and a printed circuit board on which the terminal block is mounted on the outer edge side. The connection terminal of the terminal block is a surface on the outer edge side of the printed circuit board. It is implemented.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress being bulky in the thickness direction of a printed circuit board in the state mounted in the printed circuit board.

It is a schematic perspective view of the temperature controller which concerns on this Embodiment. It is the figure which looked at the temperature controller which concerns on this Embodiment from back. It is the figure which looked at the temperature controller which concerns on this Embodiment from upper direction. It is the figure which looked at the terminal block which concerns on this Embodiment from back. It is the figure which looked at the terminal block which concerns on this Embodiment from the right side. FIG. 6 is a cross-sectional view taken along arrow A in FIG. 5. It is B arrow sectional drawing of FIG. It is the figure which looked at the terminal block which concerns on this Embodiment from the front. It is the figure which looked at the terminal block which concerns on this Embodiment from upper direction. It is the figure which looked at the state which attached the terminal block to the printed circuit board from the right side. It is the figure which looked at the temperature controller which concerns on a comparative example from upper direction.

  Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. The temperature controller according to the present embodiment is a device that performs temperature control by outputting an output to a heater or the like in response to input from a temperature sensor, a thermocouple, or the like. In the following description, unless otherwise specified, “upper”, “lower”, “left”, “right”, “front”, and “rear” are used with reference to FIG.

  FIG. 1 is a schematic perspective view of a temperature controller according to the present embodiment. As shown in FIG. 1, the temperature controller 10 includes a rectangular cylindrical casing 11 extending in the front-rear direction and a front surface portion 12 provided in front of the casing 11. The front unit 12 includes a display area 12a for displaying measured values and set values, and an operation unit 12b including a plurality of buttons operated by an operator. A plurality (five in the present embodiment) of partition plates 13 are provided in series behind the housing 11.

  FIG. 2 is a view of the temperature controller according to the present embodiment as viewed from the rear. As shown in FIG. 2, the temperature controller 10 includes three terminal blocks 20 that are provided on the rear side (front side in FIG. 2) of the casing 11 and extend in the vertical direction. The three terminal blocks 20 are provided side by side. The terminal block 20 is partitioned in the vertical direction for each connection terminal 21 by a partition plate portion 13 extending left and right as viewed from the rear of the housing 11. Connected to the connection terminal 21 is a crimp terminal (external terminal) of a lead wire that inputs and outputs from a measuring instrument such as a temperature sensor and an external device such as a heater.

  FIG. 3 is a view of the temperature controller according to the present embodiment as viewed from above. As shown in FIG. 3, the temperature controller 10 includes four printed circuit boards 15 in a housing 11. In this embodiment, the printed circuit board 15 indicated by reference numeral 15a is an input / output board 15a, the printed circuit board 15 indicated by reference numeral 15b is an option board 15b, the printed circuit board 15 indicated by reference numeral 15c is a power supply board 15c, and the printed circuit board 15 indicated by reference numeral 15d. Is a front board 15d.

  The input / output board 15a has a function of performing relay contact output, SSR drive output, and current output in addition to a temperature sensor and a function of inputting measurement values such as voltage and current signals. The option board 15b has a communication function, a digital input function, and the like. The power supply board 15c has a function of outputting an alarm signal in addition to an input function from the power supply. The front board 15d performs various arithmetic processes and controls together with the other boards 15a to 15c. The option board 15b is selectively used according to the needs of the user, and when not used, the temperature controller 10 can perform temperature control even if it is removed.

  The input / output board 15a, option board 15b, and power supply board 15c have their front and back surfaces oriented in the front-rear direction and the up-down direction (in the direction orthogonal to the paper surface in FIG. 3), and are arranged at intervals in the left-right direction so as to be parallel to each other. It is installed. The front board 15d has its front and back faces directed in the left and right and up and down directions. The input / output board 15a, the option board 15b, and the power supply board 15c are each provided with a terminal block 20 on the outer edge side of the rear part, and these terminal blocks 20 have the same configuration. The input / output board 15a and the power supply board 15c are connected and fixed to the front board 15d by soldering on the front end side. The option board 15b is connected to the front board 15d via a connector (not shown), and is detachable by insertion / removal using the connector. The mounting of the input / output board 15a, the option board 15b, and the power supply board 15c to the terminal block 20 will be described later.

  Next, the detailed configuration of the terminal block 20 will be described with reference to FIGS. 4 is a view of the terminal block as viewed from the rear, and FIG. 5 is a view of the terminal block as viewed from the right side. 6 is a cross-sectional view taken along arrow A in FIG. As shown in FIGS. 4 to 6, the terminal block 20 includes a plurality of (six in the present embodiment) connection terminals 21 arranged in the vertical direction and a base 22 that holds the connection terminals 21. I have. The base 22 has a rectangular shape that is long in the vertical direction when viewed from the rear, and is formed with the horizontal direction as the horizontal direction. A support surface 22 a (not shown in FIG. 5) for supporting the connection terminal 21 is formed on the rear surface of the base 22. The support surface 22a is directed in a direction inclined in the left front direction (right rear direction) with respect to the left-right direction. Further, a groove 22b for receiving the above-described partition plate portion 13 (see FIG. 2) is formed on the rear surface of the base 22.

  7 is a cross-sectional view taken along arrow B in FIG. As shown in FIG. 7, the connection terminal 21 includes a terminal screw 24 formed of a male screw, a conductor portion 25 that holds the terminal screw 24, and a washer 26 that is interposed between the terminal screw 24 and the conductor portion 25. ing.

  The terminal screw 24 is received by a receiving portion 22 c formed such that the head portion is exposed rearward and the shaft portion is recessed in the support surface 22 a of the base 22.

  The conductor portion 25 is formed by bending a conductor piece such as metal. The conductor portion 25 includes a supported portion 25a that is in surface contact with the support surface 22a, and lead end portions 25b that are provided to be connected to both left and right ends of the supported portion 25a. The supported portion 25 a is formed with a female screw portion 25 c that is screwed into the terminal screw 24. The position of the central axis C1 in the female screw portion 25c is directed in a direction orthogonal to the support surface 22a, whereby the terminal screw 24 screwed into the female screw portion 25c is inclined leftward when viewed from the rear (see FIG. 4).

  The left and right lead end portions 25b are provided so as to penetrate the base 22 from the support surface 22a and to protrude forward from the front surface 22d of the base 22 on the front end side. The left and right lead end portions 25b have the same protruding height from the front surface 22d. Further, the left and right lead end portions 25b are disposed at a position that is equidistant from the center position C2 in the left-right direction of the base 22 and that falls within the width (left-right width) of the base.

  FIG. 8 is a view of the terminal block as viewed from the front. As described above, since the lead end portion 25b protrudes forward from the front surface 22d of the base 22, a plurality of lead end portions 25b are arranged vertically when the terminal block 20 is viewed from the front as shown in FIG. Arranged. Further, the terminal block 20 includes, as a part of the base 22, a first protrusion 22e that constitutes a sandwiching portion that protrudes forward from the front surface 22d, and a plurality of protrusions that protrude further forward than the front surface of the first protrusion 22e. A second protrusion 22f that constitutes the sandwiching portion is formed. The first protrusion 22e is formed between the upper and lower ends of the front surface 22d, and the left and right side surfaces of the first protrusion 22e are formed at a distance equidistant from the lead end 25b adjacent in the left-right direction.

  The formation position of the second protrusion 22f is a position that is a predetermined distance away from the respective lead end portions 25b except the uppermost and lowermost lead end portions 25b toward the center position C2 side of the base 22 in the left-right direction. . FIG. 9 is a view of the terminal block as viewed from above. As shown in FIG. 9, the second protrusion 22f is formed in a substantially triangular or trapezoidal shape when viewed from above, and is provided in a shape that becomes narrower toward the tip. Returning to FIG. 7, the second protrusion 22f includes a contact surface portion 22fa located on the same plane as the left and right side surfaces of the first protrusion 22e.

  Here, the separation width between the side surface and the contact surface portion 22fa of the first protrusion 22e and the inner surface of the lead end portion 25b facing the first protrusion 22e is slightly smaller than the thickness of the printed board 15. Thereby, when the outer edge side of the printed circuit board 15 is inserted between them, the lead end portion 25b is elastically deformed, and the printed circuit board 15 receives the elastic force of the lead end portion 25b. Therefore, the outer edge side of the printed circuit board 15 is sandwiched from the thickness direction by the lead end portion 25b, the side surface of the first protrusion 22e, and the contact surface portion 22fa. Here, the mounting portion 30 is configured by the conductor portion 25 forming the lead end portion 25b, the first protrusion 22e, and the second protrusion 22f forming the contact surface portion 22fa. A plurality (two in this embodiment) of the mounting portions 30 are provided side by side in the left-right direction with the center position C2 of the base 22 interposed therebetween.

  FIG. 10 is a view of the state in which the terminal block is mounted on the printed circuit board as viewed from the right side. As shown in FIGS. 8 and 10, the base 22 includes first position restricting portions 27 provided on both upper and lower sides of the front surface 22 d. The first position restricting portion 27 is formed by a protrusion that protrudes forward from the front surface 22d and has a tip that has an inward hook shape. The first position restricting portions 27 are provided on both the left and right sides of the center position C <b> 2 (not shown in FIG. 10) of the base 22 according to the arrangement area of the mounting portion 30.

  A first fitted portion 15a is formed at each of the upper and lower corner portions on the rear edge side of the printed board 15 (not shown in FIG. 8). The first fitted portion 15 a is formed by a hook-shaped outer edge that fits into the first position restricting portion 27, and the first fitted portion 15 a is formed from the printed circuit board 15 when the first fitted portion 15 a is fitted into the first position restricting portion 27. Relative displacement in the direction in which the table 22 leaves (rearward) is restricted.

  The base 22 includes second position restricting portions 28 provided between the second and third lead end portions 25b from the top and between the fourth and fifth lead end portions 25b from the top on the front surface 22d. I have. The second position restricting portion 28 is formed by a rib protruding forward from the front surface 22d at a position adjacent to the first projecting portion 22e (not shown in FIG. 10) in the left-right direction. However, the protrusion height is relatively higher than the upper second position restricting portion 28b.

  At two positions on the rear edge side of the printed circuit board 15, second fitted portions 15b and 15c are formed so as to partially dent the rear edge. The lower second fitted portion 15b and the upper second fitted portion 15c have different depths (in the front-rear direction). Specifically, the lower second fitted portion 15b is set to a depth at which the lower second position restricting portion 28a can be inserted. On the other hand, the upper second fitted portion 15c is set to a depth at which the upper second position restricting portion 28b can be inserted, but the lower second position restricting portion 28a cannot be entirely inserted. . Accordingly, when the terminal block 20 is reversed at the upper limit, and the positions of the second position restricting portions 28a and 28b are opposite to the positions shown in FIG. 10, the second fitting is performed at the tip of the second position restricting portion 28a having a high protruding height. The bottom side of the joint portion 15 c comes into contact, and the terminal block 20 cannot be mounted on the printed circuit board 15. That is, in mounting the terminal block 20, it is possible to avoid the terminal block 20 being upside down.

  The vertical widths of the second fitted portions 15b and 15c are the same as or slightly larger than the vertical widths of the second position restricting portions 28a and 28b. Therefore, in the state where the second position restricting portions 28a and 28b are inserted and fitted into the second fitted portions 15b and 15c, the base 22 and the extending direction of the rear edge of the printed circuit board 15, that is, the vertical direction, The relative displacement of the printed circuit board 15 can be restricted.

  Then, the mounting method to the printed circuit board 15 of the terminal block 20 is demonstrated.

  First, as shown in FIG. 7, the printed circuit board 15 is disposed between the lead end portion 25 b of one of the mounting portions 30 and the protrusions 22 e and 22 f among the left and right mounting portions 30 of the terminal block 20. Insert the end side. At this time, as shown in FIG. 10, the vertical direction of the terminal block 20 is set so that the second position restricting portions 28a and 28b correspond to the depth of the second fitted portions 15b and 15c, The second position restricting portions 28a and 28b are received in the fitted portions 15b and 15c. At the same time, the first position restricting portions 27 are fitted to each other in the first fitted portions 15a at the two upper and lower locations. As a result, the terminal block 20 is mounted on the printed circuit board 15, and the state where each lead end portion 25 b is in surface contact with the electrode 15 d of the printed circuit board 15 is maintained.

  From this state, the printed circuit board 15 on which the terminal block 20 is mounted is put into a reflow furnace, and the solder paste printed on the electrodes 15d of the printed circuit board 15 is dissolved. As a result, the electrode 15 d and the lead end 25 b are joined via the solder, and the lead end 25 b of the connection terminal 21 is surface-mounted on the printed board 15.

  Such surface mounting can be performed in the same manner when the printed circuit board 15 is mounted on either of the left and right mounting portions 30. Regardless of whether the printed circuit board 15 is mounted on either of the left and right mounting portions 30, the printed circuit board 15 can be accommodated within the width (left and right width) of the base 22 when the state is viewed from the rear (see FIG. 7). ). Thereby, when the terminal block 20 and the printed circuit board 15 are viewed as a unit, the left and right width of the unit can be made the same as the left and right width of the base 22 so as not to be bulky.

  Here, as a comparative example with respect to the present embodiment, a structure of a conventional insertion mounting will be described with reference to FIG. FIG. 11 is a view of the temperature controller according to the comparative example as viewed from above. As shown in FIG. 11, the terminal block 120 of the temperature controller 100 according to the comparative example is also mounted on the rear end side of the printed circuit board 115. However, in the comparative example, the lead end portion 125b of the connection terminal 125 in the terminal block 120 is formed so as to protrude sideward (leftward or rightward). The lead end portion 125b is inserted and mounted by being soldered after passing through a hole formed in the printed board 115. Accordingly, the printed circuit board 115 is disposed on the outer side in the left-right direction with respect to the base 122 of the terminal block 120 in a state where the insertion mounting is completed. Therefore, the above-described unit of the embodiment can be made smaller by the thickness of the printed circuit board 115 than the comparative example so that the left and right widths are not bulky.

  Thereby, the direction of embodiment can improve the freedom degree of the layout of the terminal block 20 and the printed circuit board 15 compared with a comparative example. Further, when a plurality of terminal blocks 20 are arranged side by side within a left and right width set in advance by a standard or the like, the embodiment can increase the number of installed terminal blocks 20 and increase the number of connection terminals 21. Thus, the control function of the temperature controller 10 can be increased.

  As described above, according to the present embodiment, two mounting portions 30 are provided on the left and right, so that the mounting portion 30 on which the printed circuit board 15 is mounted can be selected. Therefore, in FIG. 3, it is mounted so that the terminal block 20 protrudes greatly on the right side like the input / output board 15a and the option board 15b, or mounted so that the terminal block 20 protrudes greatly on the left side like the power supply board 15c. You can do it. Thereby, even when the position of the terminal block 20 cannot be changed inside the housing 11, the positions of the boards (printed boards) 15 a to 15 c can be changed, and the degree of design freedom can be increased.

  Further, since the mounting portion 30 is sandwiched from the thickness direction (left-right direction) of the printed board 15, the relative displacement in the left-right direction between the terminal block 20 and the printed board 15 can be restricted. Moreover, since the printed circuit board 15 can be pressed by the elastic force of the lead end portion 25b, the relative position between the printed circuit board 15 and the terminal block 20 is shifted or the direction is changed before soldering. Can be suppressed.

  Further, when the first fitted portion 15a of the printed circuit board 15 is fitted to the first position restricting portion 27 of the base 22, the relative displacement in the direction (rear) in which the terminal block 20 is separated from the printed circuit board 15 is restricted. can do. Furthermore, when the second fitted portions 15b and 15c of the printed board 15 are fitted to the second position restricting portion 28 of the base 22, the relative displacement in the vertical direction between the terminal block 20 and the printed board 15 is restricted. be able to. As described above, in the present embodiment, the relative displacement between the terminal block 20 and the printed circuit board 15 in the three axis directions orthogonal to the left, right, front, back, and top and bottom can be regulated. Thereby, in the reflow process of surface mounting, etc., the step of mounting the terminal block 20 on the jig can be omitted, and the positional accuracy of the mounted terminal block 20 can be improved.

  Moreover, in the base 22, since the support surface 22a which supports the connection terminal 21 inclines with respect to the width direction (left-right direction) of the base 22, external terminals, such as a crimp terminal, are attached along the inclination direction. It can be inserted into the connection terminal 21. Therefore, the connection terminals 21 that are adjacent to the left and right are less likely to become obstructive during such insertion, and the connection of the external terminals can be facilitated.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications. Moreover, there is no restriction | limiting in particular about the numerical value, dimension, material, and direction which were demonstrated by the said embodiment. Other modifications may be made as appropriate without departing from the scope of the object of the present invention.

  For example, the number of terminal blocks 20 installed in the temperature controller 10 may be changed, and at least one terminal block is sufficient. Furthermore, the number of connection terminals 21 in the terminal block 20 may be at least one.

  In addition, in the mounting portion 30, the lead end portion 25 b may not be pressed against the printed circuit board 15 by elastic force. However, when the pressing is performed, the terminal block 20 is displaced during the surface mounting process. It is advantageous in that it becomes difficult.

  Further, in the mounting portion 30, the sandwiched portion is formed by the first projecting portion 22e and the second projecting portion 22e. However, the present invention is not limited to this, and the printed circuit board 15 can be sandwiched by a part of the conductor portion 25. The sandwiching portion may be formed by a member different from the base 22.

  In addition, the configurations of the first position restricting portion 27 and the first fitted portion 15a may be changed. For example, the hook-like direction in the above embodiment may be reversed upside down.

  The heights of the second position restricting portions 28a and 28b may be the same, and the depths of the second fitted portions 15b and 15c may be the same accordingly. According to this, the vertical direction of the terminal block 20 with respect to the printed circuit board 15 can be selected, and as a result, the inclination direction of the support surface 22a and the connection terminal 21 can also be selected. Further, the configurations of the second position restricting portion 28 and the second fitted portions 15b and 15c may be changed. For example, the second fitted portions 15b and 15c are arranged from the rear edge of the printed circuit board 15. It is good also as a convex part which protrudes, and it is good also considering the 2nd position control part 28 as a recessed part formed in 22d of front surfaces of the base 22. FIG.

  Moreover, as long as the terminal block 20 of this invention is mounted in the printed circuit board 15, you may use it for various apparatuses, such as measuring instruments other than the temperature controller 10, and control equipment.

DESCRIPTION OF SYMBOLS 10 Temperature controller 15 Printed circuit board 15a 1st to-be-fitted part 15b 2nd to-be-fitted part 15c 2nd to-be-fitted part 20 Terminal block 21 Connection terminal 22 Base 22a Support surface 22e 1st protrusion part (pinching part)
22f 2nd protrusion (clamping part)
25 conductor portion 27 first position restricting portion 28 second position restricting portion 30 mounting portion

Claims (9)

A base disposed on the outer edge side of a predetermined printed circuit board, at least one connection terminal held on the base and connected to a predetermined external terminal, and the outer edge side of the printed circuit board are sandwiched from the thickness direction With possible mounting parts,
The connection terminal is provided on the printed circuit board so as to be surface-mountable;
A plurality of the mounting portions are provided side by side in the width direction of the base that is the sandwiching direction of the mounting portions ,
The mounting portion includes a conductor portion that is a part of the connection terminal and is in contact with the printed board, and a sandwiching portion that sandwiches the conductor portion and the printed board.
The conductor portion includes a supported portion that contacts a support surface that supports the connection terminal on the base, and a pair of lead end portions that are provided to be connected to both ends of the supported portion, respectively. Characteristic terminal block.   The terminal block according to claim 1, wherein when the connection terminal is surface-mounted on the printed circuit board, the printed circuit board fits within a width of the base. The pair of lead end portions are respectively provided so as to penetrate the base from the support surface and protrude from the base at the tip side, and are arranged at positions equidistant from the center position in the width direction of the base. The terminal block according to claim 1 , wherein the terminal block is provided. The base is provided with a first position restricting portion, and the first position restricting portion is fitted to a part of the printed board and restricts the base from being separated from the printed board. terminal block according to any one of claims 1 to 3. The base is provided with a second position restricting portion, and the second position restricting portion restricts relative displacement of the base in the extending direction of the outer edge by fitting to a part of the printed circuit board. The terminal block according to any one of claims 1 to 4 , wherein the terminal block is provided. The said base is provided with the support surface which supports the said connecting terminal, This support surface is inclined with respect to the width direction of the said base, The Claim 1 thru | or 5 characterized by the above-mentioned. The listed terminal block. A temperature controller comprising the terminal block according to any one of claims 1 to 6 and a printed board on which the terminal block is mounted on an outer edge side.
The temperature controller according to claim 1, wherein the connection terminal of the terminal block is surface-mounted on the outer edge side of the printed circuit board. In the temperature controller comprising the terminal block according to claim 4 and a printed board on which the terminal block is mounted on the outer edge side,
The connection terminal of the terminal block is surface-mounted on the outer edge side of the printed circuit board,
The printed circuit board is formed with a first fitted portion, and the first fitted portion is fitted with the first position restricting portion to restrict the terminal block from being separated from the printed board. A temperature controller. In the temperature controller comprising the terminal block according to claim 5 and a printed board on which the terminal block is mounted on the outer edge side,
The connection terminal of the terminal block is surface-mounted on the outer edge side of the printed circuit board,
A second fitted portion is formed on the printed circuit board, the second fitted portion is fitted with the second position restricting portion, and the terminal block is relatively displaced in the extending direction of the outer edge. Temperature controller characterized by regulation.

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