JP6552757B2 - Coil device and motor-operated valve and solenoid valve using the same - Google Patents

Description

  The present invention relates to a coil device and a motor-operated valve and a solenoid valve using the same.

  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 the valve chamber and a valve seat provided on the communication valve port of the secondary port side partition It is known to have a main body, a valve rod having a needle valve at its tip, which is in contact with and separated from the valve seat of the valve main body, and a stepping motor for moving the valve rod axially 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 having a current-carrying terminal projecting from a terminal connection portion of the coil bobbin, an outer peripheral portion of the magnet wire And the terminal connection portion, and the conductive terminal extends inside the socket portion integrally provided on the outer peripheral portion of the mold resin so as to insert and connect the plug of the power cord. ing.

  More specifically, as shown in FIGS. 6 and 7, in the above-described conventional stepping motor, the magnet wire W wound around the coil bobbin B is connected to the conduction 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 off using the corner part of the conduction terminal T, it is fixed to the conduction terminal T by soldering H or the like and electrically connected (conductive), and then, A mold resin (not shown in FIGS. 5 and 6) is molded to cover the outer periphery of the magnet wire W, the terminal connection portion C, and the outside of the current-carrying terminal T fixed to the terminal connection portion C (e.g. Reference 2).

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

  By the way, in the above-described conventional stepping motor, the magnet wire W wound around the coil bobbin B in order to hold the winding tension in the coil bobbin or reduce the load due to the pressure during molding of the mold resin is shown in FIG. As shown in FIG. 7, the conductive terminal T has a slight slack (margin) at the proximal end of the conductive terminal T provided in a projecting manner at the terminal connection portion C, specifically, before being fixed by soldering or the like. Generally, it is wound 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 capable of stabilizing a entangled state of a magnet wire to be wound around a current-carrying terminal and a motorized 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 a conduction terminal having a rectangular cross section, and a coil bobbin wound around and fixed to the conduction terminal by solder. A coil device comprising a magnet wire and a mold resin covering an outer peripheral portion of the magnet wire, wherein a corner of the conduction terminal is formed in a part of the conduction terminal projecting from the coil bobbin. A recessed area is provided, and the magnet wire wound from the coil bobbin is wound around the recessed area several times, and is fixed to the conductive terminal at a tip end side of the recessed area in the conductive terminal and conducted. The solder covers the recess area and a part of the magnet wire which is entangled in the recess area, and the solder It, is characterized in that the boundary between the recessed area and the region of the corner portion of the conducting terminal is covered.

  The recessed area is preferably formed by rounding or chamfering the corner of the current-carrying 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 the motor-operated valve according to the present invention, there is provided a stepping motor having the coil device, a valve body having a valve port, and a valve shaft driven by a driving force generated by energization of the stepping motor to open and close the valve port. It is characterized by providing these.

  Further, the electromagnetic valve according to the present invention comprises the coil device, a valve main body having a valve port, and a valve shaft driven by magnetic force generated by energization of the coil device to open and close the valve port. It is characterized by.

  According to the present invention, since the hollow area for temporarily winding the magnet wire wound from the coil bobbin is provided in a part of the current-carrying terminal protruding from the coil bobbin, the hollow area is the windup area. It becomes a standard of (the area where the magnet wire should be tangled), and the entangled state of the magnet wire entwined to the current-carrying terminal (such as a defect state of the entanglement) can be easily confirmed visually (eg, in the manufacturing process) Therefore, the entangled state of the magnet wire to be entangled in the current-carrying terminal can be stabilized. In addition, even when the magnet wire is entangled to the current-carrying terminal with a slight slack (margin), the magnet wire entwined in the depression area becomes difficult to come off from the depression area, and the winding width of the magnet wire is predetermined. Since it can be contained within the width (in other words, the binding width can be kept uniform), also from this point, it is possible to stabilize the binding state of the magnet wire that is bound to the current-carrying terminal.

BRIEF DESCRIPTION OF THE DRAWINGS 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. 3 is a sectional view taken along the line U-U in FIG. 2. Sectional drawing in accordance with the UU 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.

  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 the main part of the coil device shown in FIG. It is -U arrow sectional drawing.

  The coil device 1 of the illustrated embodiment basically includes, for example, a coil bobbin 10 made of resin and provided with current-carrying terminals 15 a to 15 c, 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 the current-carrying terminals 15a to 15c to the surface (in the illustrated example, the lower surface) of the terminal connection portion 11. Support fixing portions 12a to 12c provided with 13a to 13c are integrally formed. In the illustrated example, for example, three rectangular support fixing portions 12a to 12c are formed side by side along the outer edge of the terminal connection portion 11, and at the approximate center of each of the support fixing portions 12a to 12c, for example, circular in cross section. Insertion holes 13a to 13c are provided.

  The current-carrying terminals 15a-15c having a rectangular cross section are press-fitted and supported and fixed in the insertion holes 13a-13c of (the respective support fixing portions 12a-12c of) the terminal connection portion 11 and the current-carrying terminals 15a-15c. The corner of the root portion (a range of a predetermined length after protruding from each of the support fixing portions 12a to 12c) is rounded (in particular, refer to the R attachment portion 18a in FIGS. 2 and 3). At root portions of the current-carrying terminals 15a-15c, recessed regions 16a-16c are provided in which corner portions of the current-carrying terminals 15a-15c are recessed.

  In the present embodiment, the recessed regions 16a to 16c are formed by rounding corner portions of (the root portions of) the current-carrying terminals 15a to 15c, but as shown in FIG. By chamfering the corner portions of the current-carrying terminals 15a-15c (chamfered portion 19a), recessed regions 16a-16c in the current-carrying terminals 15a-15c may be formed.

  As described above, the corners of each of the current-carrying 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 having rounded corners (see FIG. 3) , A circle, an ellipse, or a pentagon or more polygon whose apex angle is greater than 90.degree. (See FIG. 4).

  The conductive terminals 15a to 15c having the above-described recessed regions 16a to 16c are, for example, only a predetermined length from a state in which a wire rod (also referred to as a square wire) having a rectangular cross section forming the conductive terminals 15a to 15c is wound on a reel. At the same time as unwinding and cutting with a length corresponding to the current-carrying terminals 15a-15c, (portions of the portions corresponding to the root portions of the current-carrying terminals 15a-15c are compressed and deformed to form the recessed regions 16a-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 thereof is provided in the recess area 16a provided in the root portion of the current-carrying terminal 15a or in the root portion of the current-carrying terminal 15c. The wire is wound (wound) several times in the region 16c (with some slack), and is wound again several times in the current-carrying terminal 15a or the current-carrying terminal 15c at a position away from the root portion of the current-carrying terminal The solder 17a applied to a portion on the tip end side of the recessed area 16a or the portion on the tip end side of the recessed area 16c after being cut at a predetermined location using a corner of the conductive terminal having a rectangular cross section The solder 17c applied to the conductive layer is fixed to the current-carrying terminal 15a or the current-carrying terminal 15c and is electrically connected (conductive). In addition, the other end of the magnet wire 20 is wound several times (with some slack) in the recessed area 16b provided at the root portion of the central current-carrying terminal 15b, and thus separated from the root portion of the current-carrying terminal 15b (that is, After being cut back at a predetermined location using the corner of the conductive terminal 15b having a rectangular cross section, the conductive terminal 15b is again wound around the conductive terminal 15b several times at the distal end side of the recessed region 16b, and then the distal end side It is fixed to the current-carrying terminal 15b by the solder 17b coated on the part and is electrically connected (conductive).

  Then, a mold resin (not shown) is molded so as to cover the outer periphery of the magnet wire 20 in the coil device 1, the terminal connection portion 11 of the coil bobbin 10, the outside of the conductive terminals 15a to 15c fixed to the terminal connection portion 11, and the like. It will be done.

  The coil device 1 having the above-described configuration is driven by a stepping motor having a stator coil configured of the coil device 1, a valve body having a valve port, and a driving force generated by energization of the stepping motor. And a valve shaft for opening and closing the valve port (for example, a motor cycle valve used for a refrigeration cycle or a heat pump type air conditioning system), a solenoid coil including 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 conditioning system) including a main body and a valve shaft driven by a magnetic force generated by energization of the solenoid coil to open and close the valve port And the like (for the detailed structure, refer to the above-mentioned Patent Documents 1 and 2).

  As described above, in the coil device 1 of the present embodiment, the magnet wire 20 unwound from the coil bobbin 10 is once entwined at the root portions of the current-carrying terminals 15 a to 15 c protruding from the terminal connection portion 11 of the coil bobbin 10. Since the recessed regions 16a to 16c for the purpose are provided, the recessed regions 16a to 16c serve as a measure of the binding region (region where the magnet wire should be bound), and the magnet wire wound around the current-carrying terminals 15a to 15c. Stabilize the winding state of the magnet wire 20 which can be wound around the current-carrying terminals 15a to 15c, since it can be easily checked visually (for example, in the manufacturing process) by the 20 winding states (in the manufacturing process etc.) Can. In addition, even when the magnet wires 20 are tangled with the current-carrying terminals 15a to 15c with a slight slack (margin), the magnet wires 20 tangled to the depressed regions 16a to 16c are detached from the depressed regions 16a to 16c. Since it becomes difficult and the winding width of the magnet wire 20 can be kept within a predetermined width (in other words, keeping the winding width uniform), the magnet wire wound around the current-carrying terminals 15a to 15c also from this point It is possible to stabilize the tangled condition of 20.

  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 boundary of) and the general portion (portion with a rectangular cross section), for example, as shown in FIG. The solder 17a covers the end of the recessed area 16a (that is, the part including the step formed between the recessed area 16a and the general part) and the end of the magnet wire 20 entangled in the recessed area 16a You may make it do.

  Further, in the above embodiment, the recessed area for temporarily winding the magnet wire is provided at the root portion of the conducting terminal, but the setting position of the recessed area is not limited to only the root portion of the conducting terminal. It is.

Reference Signs List 1 coil device 10 coil bobbin 11 terminal connection portion 12a to 12c support fixing portion 13a to 13c insertion hole 15a to 15c conductive terminal 16a to 16c recessed area 17a to 17c solder 18a R attached portion 19a chamfered portion 20 magnet wire

Claims (5)

A coil device comprising: a coil bobbin provided with a conduction terminal having a rectangular cross section; a magnet wire wound around the coil bobbin and fixed to the conduction terminal by solder; and a mold resin covering an outer peripheral portion of the magnet wire. ,
A recessed area is formed in a part of the current-carrying terminal protruding from the coil bobbin, with a corner of the current-carrying terminal recessed, and the magnet wire unwound from the coil bobbin is several times in the recessed area It is wound and fixed to the current-carrying terminal at a tip end side with respect to the recessed area in the current-carrying terminal and is conducted.
The solder covers the hollow area and a part of the magnet wire which is entangled in the hollow area, and the solder covers the boundary between the hollow area of the current-carrying terminal and the area with the corner. A coil device characterized in that   2. The coil device according to claim 1, wherein the recessed region is formed by rounding or chamfering a corner of the energizing terminal.   The cross-sectional shape of the recessed area is a rectangle having a rounded corner, a circle, an ellipse, or a polygon whose apex angle is larger than 90 °. Coil device.   A stepping motor having the coil device according to any one of claims 1 to 3, a valve body having a valve port, and a driving force generated by energization of the stepping motor opens and closes the valve port. A motor-operated valve comprising: a valve shaft.   A coil device according to any one of claims 1 to 3, a valve body having a valve port, and a valve shaft driven by magnetic force generated by energization of the coil device to open and close the valve port. A solenoid valve comprising:

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