JP2018148082A - Coil device and motor-operated valve and solenoid valve using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil device capable of stabilizing a state of a magnet wire entangled to an electrification terminal, and to a motor-operated valve and a solenoid valve using the coil device.SOLUTION: Parts of electrification terminals 15a-15c projecting from a coil bobbin 10 are provided with dent areas 16a-16c formed by recessed corners of the electrification terminals 15a-15c. A magnet wire 20 unwound from the coil bobbin 10 is entangled to the dent areas 16a-16c, fastened to the electrification terminals 15a-15c at a side closer to the tip than the dent areas 16a-16c in the electrification terminals 15a-15c and is conducted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a coil device, and an electric valve and an electromagnetic valve using the coil device.

  Conventionally, as an electric flow control valve used for flow control of a fluid such as a refrigerant, for example, a valve having a primary port and a secondary port communicating with a valve chamber and a valve seat provided at a communication valve port of a secondary side partition There is known a main body, a valve rod having a needle valve at the tip thereof that contacts and separates from the valve seat of the valve main body, and a stepping motor that moves the valve shaft in the axial direction to open and close the needle valve. (For example, refer to Patent Document 1).

  The stepping motor used in the above-described conventional electric flow control valve has a magnet wire wound around a coil bobbin, and a magnet wire winding bobbin in which a current-carrying terminal protrudes from the terminal connection portion of the coil bobbin. The power supply cord plug is inserted and connected to the inside of the socket part integrally projecting on the outer peripheral part of the mold resin. ing.

  More specifically, in the conventional stepping motor, as shown in FIGS. 6 and 7, the magnet wire W wound around the coil bobbin B is connected to the energizing terminal T having a rectangular cross section provided at the terminal connection portion C of the coil bobbin B. After being wound (twisted) several times and cut using the corners of the current-carrying terminal T, it is fixed to the current-carrying terminal T by soldering H or the like and electrically connected (conducted). Mold resin (not shown in FIGS. 5 and 6) is molded so as to cover the outer periphery of the magnet wire W, the terminal connecting portion C, and the outside of the energizing terminal T fixed to the terminal connecting portion C (for example, patents). Reference 2).

JP-A-8-65994 JP 2015-32753 A

  By the way, in the conventional stepping motor, in order to maintain the winding tension in the coil bobbin or to reduce the load due to the pressure during molding resin molding, the magnet wire W wound around the coil bobbin B is shown in FIG. As shown in FIG. 7, the energizing terminal T has a slight looseness (margin) at the base portion of the energizing terminal T protruding from the terminal connection portion C, specifically, before being fixed by soldering or the like. It is generally wound (twisted) several times. For this reason, there is a concern that the entangled state (for example, the entangled width) of the magnet wire W tends to become unstable at the base portion of the energizing terminal T.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coil device that can stabilize the entangled state of a magnet wire that is entangled with a current-carrying terminal, and a motor-operated valve using the coil device. And providing a solenoid valve.

  In order to solve the above-described problems, a coil device according to the present invention basically includes a coil bobbin provided with an energizing terminal having a rectangular cross section, and a magnet wire wound around the coil bobbin and fixed to the energizing terminal. And a molded resin that covers the outer periphery of the magnet wire, and a hollow region formed by recessing a corner of the current-carrying terminal in a part of the current-carrying terminal protruding from the coil bobbin The magnet wire wound out from the coil bobbin is entangled in the recessed area, and is fixed to the energizing terminal on the tip side from the recessed area in the energizing terminal and is conducted. .

  The recessed area is preferably formed by rounding or chamfering the corner of the energizing terminal.

  The cross-sectional shape of the depression region preferably has a rectangular shape with rounded corners, a circular shape, an elliptical shape, or a polygon with an apex angle larger than 90 °.

  In a preferred embodiment, the magnet wire is fixed to the energizing terminal with solder, and the recess region and a part of the magnet wire entangled with the recess region are covered with the solder.

  The motor-operated valve according to the present invention includes a stepping motor having the coil device, a valve body having a valve port, and a valve shaft that is driven by a driving force generated by energizing the stepping motor to open and close the valve port. It is characterized by providing these.

  The electromagnetic valve according to the present invention includes the coil device, a valve body having a valve port, and a valve shaft that is driven by a magnetic force generated by energizing the coil device to open and close the valve port. It is characterized by.

  According to the present invention, since a hollow region for temporarily winding the magnet wire wound out from the coil bobbin is provided in a part of the energization terminal protruding from the coil bobbin, the hollow region is a binding region. It can be used as a guide for the area where the magnet wire is to be entangled, and the entangled state of the magnet wire entangled with the current-carrying terminal (such as a faulty state of entanglement) can be easily confirmed visually (for example, in the manufacturing process). For this reason, the entangled state of the magnet wire entangled with the energizing terminal can be stabilized. In addition, even when the magnet wire is tied to the energizing terminal with a slight looseness (margin), the magnet wire entangled in the recessed area is difficult to come off from the recessed area, and the entangled width of the magnet wire is set to a predetermined value. Since it can be accommodated within the width (in other words, the binding width can be kept uniform), the entangled state of the magnet wire entangled with the energizing terminal can be stabilized also from this point.

The perspective view which shows the principal part of one Embodiment of the coil apparatus which concerns on this invention. The bottom view with a principal part enlarged view of the coil apparatus shown by FIG. FIG. Sectional drawing which follows the UG arrow line of FIG. 2 which shows the other example of the electricity supply terminal shown by FIG. The principal part enlarged bottom view which shows the other example of the coil apparatus shown by FIG. The bottom view with a principal part enlarged view of the conventional coil apparatus. VV arrow sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a main part of an embodiment of a coil device according to the present invention, FIG. 2 is a bottom view with an enlarged view of a main part of the coil device shown in FIG. 1, and FIG. It is -U arrow sectional drawing.

  The coil device 1 of the illustrated embodiment basically includes, for example, a resin coil bobbin 10 provided with energization terminals 15a to 15c, and a magnet wire 20 wound around the coil bobbin 10.

  A terminal connection portion 11 having a substantially rectangular shape in plan view protrudes from the outer periphery of the coil bobbin 10, and an insertion hole for press-fitting and fixing the energization terminals 15 a to 15 c on the surface (the lower surface in the illustrated example) of the terminal connection portion 11. Support fixing portions 12a to 12c provided with 13a to 13c are integrally formed. In the illustrated example, three support fixing portions 12a to 12c having a rectangular shape, for example, are formed side by side along the outer edge of the terminal connection portion 11, and at the center of each of the support fixing portions 12a to 12c, for example, a circular cross section. Insertion holes 13a to 13c are provided.

  In the insertion holes 13a to 13c of the terminal connection portion 11 (the support fixing portions 12a to 12c thereof), energization terminals 15a to 15c having a rectangular cross section are press-fitted and fixed, and the energization terminals 15a to 15c are also fixed. The corners of the root portion (the range of a predetermined length after protruding from each of the support fixing portions 12a to 12c) are R-attached (in particular, refer to the R-attachment portion 18a in FIGS. 2 and 3). In the root portions of the energization terminals 15a to 15c, recessed regions 16a to 16c formed by recessing the corners of the energization terminals 15a to 15c are provided.

  In addition, in this example, the said recessed area | regions 16a-16c are formed by carrying out R attachment of the corner | angular part of each electricity supply terminal 15a-15c (the root part), but as shown, for example in FIG. You may form the hollow area | regions 16a-16c in each said electricity supply terminal 15a-15c by chamfering the corner | angular part of the electricity supply terminals 15a-15c (chamfering part 19a).

  As described above, the corners of the energizing terminals 15a to 15c are rounded or chamfered so that the cross-sectional shape of the recessed regions 16a to 16c is, for example, a rectangle with rounded corners (see FIG. 3). , A circle, an ellipse, or a pentagon or more polygon (see FIG. 4) with an apex angle greater than 90 °.

  The energizing terminals 15a to 15c having the recessed regions 16a to 16c described above are, for example, a predetermined length from a state in which a rectangular wire (also referred to as a square wire) constituting the energizing terminals 15a to 15c is wound on a reel. Unwinding and cutting with a length corresponding to the energizing terminals 15a to 15c, and simultaneously compressing and deforming portions (corner portions) corresponding to the root portions of the energizing terminals 15a to 15c to form the recessed regions 16a to 16c. Thus, it can be manufactured.

  The magnet wire 20 is wound around the coil bobbin 10 while applying a predetermined tensile force, and one end of the magnet wire 20 is provided in the recessed portion 16a provided in the root portion of the energizing terminal 15a or the recessed portion provided in the root portion of the energizing terminal 15c. The region 16c is wound (wound) several times (with a slight slack), and is again entangled several times with the current-carrying terminal 15a or the current-carrying terminal 15c at a position away from the base portion of the current-carrying terminal (that is, the tip side from the recessed region). After being cut at a predetermined location using the corners of the current-carrying terminals having a rectangular cross section, the solder 17a applied to the tip side portion from the dent region 16a or the tip side portion from the dent region 16c The solder 17c applied to the conductive terminal 15a is fixed to the conductive terminal 15a or the conductive terminal 15c and is electrically connected (conductive). Further, the other end of the magnet wire 20 is entangled several times (with a slight slack) in a recessed region 16b provided at the root portion of the central energizing terminal 15b, and a position separated from the root portion of the energizing terminal 15b (that is, , It is entangled again with the current-carrying terminal 15b several times at the front end side from the hollow region 16b) and cut at a predetermined location using the corners of the current-carrying terminal 15b having a rectangular cross section. The solder 17b applied to the portion is fixed to the energizing terminal 15b and is electrically connected (conducted).

  Then, a molding resin (not shown) is formed so as to cover the outer peripheral portion of the magnet wire 20 in the coil device 1, the terminal connection portion 11 of the coil bobbin 10, the outside of the energization terminals 15 a to 15 c fixed to the terminal connection portion 11, and the like. Will be.

  The coil device 1 having the configuration as described above is driven by a stepping motor provided with a stator coil composed of the coil device 1, a valve body having a valve port, and a driving force generated by energizing the stepping motor. And a valve shaft that opens and closes the valve port, a motorized valve (for example, a motorized valve used in a refrigeration cycle, a heat pump type air conditioning system, etc.), a solenoid coil comprising the coil device 1, and a valve having a valve port A solenoid valve (for example, a solenoid valve used in a fluid system such as a refrigeration cycle or a multi air conditioner system) having a main body and a valve shaft that is driven by a magnetic force generated by energization of the solenoid coil to open and close the valve port (For the detailed structure, refer to Patent Documents 1 and 2 above).

  As described above, in the coil device 1 according to the present embodiment, the magnet wire 20 unwound from the coil bobbin 10 is once entangled with the root portions of the energization terminals 15 a to 15 c that are provided so as to protrude from the terminal connection part 11 of the coil bobbin 10. Since the depression regions 16a to 16c are provided, the depression regions 16a to 16c serve as a guide for the binding region (the region where the magnet wire is to be wound), and the magnet wire entangled with the energizing terminals 15a to 15c. 20 can be easily checked visually (for example, in the manufacturing process) by the visual check or the like (for example, in the manufacturing process), so that the entangled state of the magnet wire 20 entangled with the energizing terminals 15a to 15c can be stabilized. Can do. Further, even when the magnet wire 20 is tied to the energization terminals 15a to 15c with a slight looseness (room), the magnet wire 20 entangled with the depression regions 16a to 16c is detached from the depression regions 16a to 16c. This makes it difficult to keep the entangled width of the magnet wire 20 within a predetermined width (in other words, keeps the entangled width uniform). From this point also, the magnet wire entangled with the energizing terminals 15a to 15c 20 entangled states can be stabilized.

  In the above-described embodiment, the solder wires 17a to 17c are applied to the front end side of the recessed area 16a in the energizing terminals 15a to 15c and the magnet wire 20 is fixed to the energizing terminals 15a to 15c. In order to reduce the load on the magnet wire due to the step formed between the base and the general portion (portion having a rectangular cross section), for example, as shown in FIG. The solder 17a covers the end of the depression region 16a (that is, the portion including the step formed between the depression region 16a and the general portion) and the end of the magnet wire 20 entangled with the depression region 16a. You may make it do.

  Moreover, in the said embodiment, although the hollow area | region for once winding a magnet wire is provided in the root part of the electricity supply terminal, of course, the setting position of the said depression area is not limited only to the root part of an electricity supply terminal. It is.

DESCRIPTION OF SYMBOLS 1 Coil apparatus 10 Coil bobbin 11 Terminal connection part 12a-12c Support fixing | fixed part 13a-13c Insertion hole 15a-15c Current supply terminal 16a-16c Depression area | region 17a-17c Solder 18a R attaching part 19a Chamfering part 20 Magnet wire

Claims (6)

A coil device comprising a coil bobbin provided with a current-carrying terminal having a rectangular cross section, a magnet wire wound around the coil bobbin and fixed to the current-carrying terminal, and a mold resin covering the outer periphery of the magnet wire,
A portion of the energizing terminal projecting from the coil bobbin is provided with a recessed area formed by recessing a corner of the energizing terminal, and the magnet wire wound out from the coil bobbin is entangled with the recessed area. A coil device, wherein the coil device is fixed and electrically connected to the energizing terminal at a distal end side with respect to the hollow region of the energizing terminal.   2. The coil device according to claim 1, wherein the recessed region is formed by rounding or chamfering a corner of the energizing terminal.   3. The cross-sectional shape of the hollow region has a rectangular shape with rounded corners, a circular shape, an elliptical shape, or a polygon with an apex angle larger than 90 °. Coil device.   2. The magnet wire is fixed to the energizing terminal with solder, and the recess region and a part of the magnet wire entangled with the recess region are covered with the solder. 4. The coil device according to any one of items 1 to 3.   A stepping motor having the coil device according to any one of claims 1 to 4, a valve body having a valve port, and a driving force generated by energizing the stepping motor is opened and closed to open and close the valve port. A motor-operated valve comprising: a valve shaft.   A coil device according to any one of claims 1 to 4, a valve body having a valve port, and a valve shaft that is driven by a magnetic force generated by energization of the coil device to open and close the valve port. A solenoid valve comprising: