JP2017180932A - Controller for electric warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for electric warmer which suppresses occurrence of abnormality such as fire and the like, and which has high safety and reliability.SOLUTION: A controller for electric warmer includes: a case comprising an upper case 310 and a lower case; a control board; and a heater wire connected to the control board. The upper case 310 or the lower case includes a plurality of partition walls 314 disposed by providing a gap substantially in parallel. An introduction groove 317a is provided in which the heater wire can be inserted from an end part of the partition wall 314, and at least at one partition wall 314, a hook-shaped introduction groove 318c is provided. Thereby, the heater wire is prevented from floating from the partition wall, and when the upper case is overlapped with the lower case, biting of the heater wire by the end part of the partition wall can be suppressed. Thus, damage of the heater wire and occurrence of abnormality such as fire and the like accompanying to it can be suppressed, and the controller for electric warmer having high safety and reliability can be provided.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a structure for introducing a heater wire to a controller of an electric warmer.

  Conventionally, in this type of electric warming tool, a controller incorporating a control board for controlling energization to the heater is installed at the corner of the main body. The end of the heater wire disposed inside the main body is connected to a control board housed inside the controller, and the heater wire is energized and controlled via the controller. The controller case is composed of an upper case and a lower case, and the control board accommodating portion for accommodating the control board is formed by contacting the inner rib with the side walls of the upper case and the lower case. . A plurality of notches are formed in the inner rib of the lower case. By inserting a heater wire into the notch and stacking the upper case on the lower case, the inner rib of the upper case opens the upper opening of the notch. It is configured to block and restrict the movement of the heater wire. The heater wire is connected to the control board through a notch. (For example, refer to Patent Document 1).

  As another example, a rectangular fixed frame is formed on the rib in the case of the controller, and a fitting groove is formed at each of two opposing positions of the fixed frame. The heater wire is pressed into two opposing fitting grooves and fixed, and the tip is connected to a predetermined connection portion of the control board. A lid is installed from above the fixed frame to prevent the heater wire from coming off the fixed frame (see, for example, Patent Document 2).

  FIG. 10 is a perspective view of the lower case of the controller of the conventional electric warmer described in Patent Document 1, and FIG. 11 is a perspective view of the upper case of the controller.

  As shown in FIG. 10, the lower case 1 has side walls 3 formed along the outer periphery of the bottom surface 2, and internal ribs 4 are formed continuously to the side walls 3. The internal rib 4 has notches 5 formed at a plurality of locations. Further, as shown in FIG. 11, the upper case 6 has a side wall 8 formed along the outer periphery of the top surface 7, and an internal rib 9 is formed continuously to the side wall 8. When the lower case 1 and the upper case are stacked, the upper opening of the notch 5 of the lower case 1 is closed by the inner rib 9 of the upper case.

  FIG. 12 shows a plan view of the inside of the controller described in Patent Document 2, and FIG. 13 shows a detailed perspective view of a state where the heater wire is pushed into the fixed frame.

  As shown in FIG. 12, side walls 11 provided along the outer periphery of the case 10 of the controller are formed, and ribs 12 are continuously formed on the side walls 11. A substantially rectangular fixed frame 13 is formed at an intermediate portion of the rib 12. Fitting grooves 14 are formed at positions facing each other at a plurality of locations on the two opposing sides of the fixed frame 13. A control board 15 is installed inside the controller surrounded by the side walls 11 and the ribs 12. The heater wire 16 is pushed into the two fitting grooves 14, and the tip of the heater wire 16 is connected to a predetermined connection portion of the control board 15. Further, as shown in FIG. 13, a lid 17 is installed from above the fixed frame 13 on which the heater wire 16 is installed.

Japanese Patent No. 5321374 JP 2002-333150 A

  However, the configuration described in Patent Document 1 is a configuration in which the upper case is installed in a state where the heater wire is inserted into the cutout and the upper portion of the cutout is opened. In such a configuration, in the process of installing the upper case, the heater wire may protrude from the notch and get caught between the rib of the lower case and the rib of the upper case, and the heater wire may be damaged. There was room for improvement in terms of reliability.

  Moreover, in the structure described in patent document 2, the cover of another member is installed as a structure of preventing a heater wire from jumping out. In such a configuration, it is indispensable to add a lid as a separate part, and since it is necessary to add a process for attaching the lid, the parts cost and assembly man-hour increase, so in terms of manufacturing cost. There was room for improvement.

  Moreover, in the structure described in the cited reference 1 and the cited reference 2, the inside of the controller provided with the 100V circuit and the main body, which is a combustible material, are configured to communicate linearly via notches and fitting grooves. ing. In such a configuration, if ignition occurs inside the controller, the main body may spread through the notch and the fitting groove, and there is room for improvement in terms of safety and reliability.

  In order to solve the above-described conventional problems, the controller of the electric warming tool of the present invention is configured to move up and down a substantially box-shaped upper case having an opening on the lower surface and a substantially box-shaped lower case having an opening on the upper surface. And a control board accommodated in the case, and a heater wire connected to the control board. The case has an accommodating portion for accommodating the control board, and a part of the outer periphery of the case. A joining portion that joins the main body of the warming tool, and at least one of the upper case and the lower case, the storage portion and the joining portion are partitioned, and a plurality of partition walls provided with a gap substantially in parallel are provided, The partition wall has a plurality of introduction grooves into which the heater wire can be inserted from the end. At least one partition wall has an opening at the end of the partition wall, a vertical portion formed substantially perpendicular to the end portion, and a vertical portion. Saddle-shaped introduction formed continuously and with a parallel part substantially parallel to the end part It is those with a.

  As a result, the heater wire can be held in the parallel part of the vertical guide groove, and the heater wire can be prevented from floating above the partition wall. Therefore, when the upper case and the lower case are overlapped, the partition wall It is possible to suppress the biting of the heater wire at the end of the heater, and it is possible to suppress the occurrence of abnormalities such as damage to the heater wire and accompanying ignition, and a highly safe and reliable controller for the electric warmer Can be provided.

  The controller of the electric warmer of the present invention can suppress the occurrence of abnormality such as ignition, and can provide a safe and highly reliable controller of the electric warmer.

The perspective view which shows the external appearance of the electric heating tool in Embodiment 1 of this invention The schematic diagram which shows the structure of the heater wire in the form 1 of the character of this invention The perspective view which shows the external appearance of the controller in Embodiment 1 of this invention Perspective view from above of the lower case of the controller Perspective view from below of upper case of the controller Detailed perspective view of the second partition C arrow view shown by arrow C in FIG. Bottom view of the controller with the control board and main body attached to the upper case Sectional view of the controller in the completed state of the electric heating device Lower case perspective view of conventional controller described in Patent Document 1 The perspective view of the upper case of the conventional controller described in patent document 1 Plan view of the inside of the controller described in Patent Document 2 The perspective view in the state where the heater wire was pushed into the fixed frame described in Patent Document 2

  According to a first aspect of the present invention, there is provided a case in which a substantially box-shaped upper case having an opening on the lower surface and a substantially box-shaped lower case having an opening on the upper surface are vertically stacked, and accommodated in the case A control board; and a heater wire connected to the control board, wherein the case has a housing part for housing the control board, and a joint part that faces a part of the outer periphery of the case and joins the body of the electric warmer At least one of the upper case and the lower case, and a plurality of partition walls that are provided with gaps substantially parallel to each other, the partition walls being end portions. A plurality of introduction grooves into which the heater wire can be pushed, and at least one of the partition walls is open to the end portion of the partition wall, and a vertical portion formed substantially perpendicular to the end portion; Formed in a continuous portion and a parallel portion substantially parallel to the end portion. The hook with the introduction groove, a controller of the electric Todan tool.

  As a result, the heater wire can be held in the parallel part of the vertical guide groove, and the heater wire can be prevented from floating above the partition wall. Therefore, when the upper case and the lower case are overlapped, the partition wall It is possible to suppress the biting of the heater wire at the end of the heater, and it is possible to suppress the occurrence of abnormalities such as damage to the heater wire and accompanying ignition, and a highly safe and reliable controller for the electric warmer Can be provided.

  In a second aspect of the invention, particularly in the first aspect of the invention, the introduction grooves provided in the plurality of partition walls are arranged at different horizontal positions, and the housing portion of the case is inserted from the outside of the case via the introduction groove. It is characterized by the fact that it cannot be viewed directly.

  As a result, when the control board accommodated in the controller is ignited, the opening of the introduction groove provided in each partition is closed by the other partition, and the fire ignited by the controller ignites the main body. It becomes possible to suppress, and safety can be improved more.

  In a third aspect of the invention, particularly in the first or second aspect of the invention, the heater wire is arranged in a substantially U-shape by being bent in at least one gap formed between the partition walls.

  As a result, it is possible to more reliably prevent the heater wire from floating above the partition wall, and when the heater wire needs to be cut due to breakage of the heater wire or malfunction of the connection work, the heater wire is bent into a substantially U shape. Therefore, the controller can be extended and connected to the control board, and the reliability and maintainability of the controller can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view showing an external appearance of the electric warming tool according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing the configuration of the heater wire.

<1> Configuration of Electric Heater As shown in FIG. 1, the electric warmer 100 has a controller 300 disposed at a corner portion of a substantially rectangular main body 200 formed of a plurality of sheet-like members. A power cord 305 that supplies power to the electric warmer 100 is connected to the right side surface. This is a heating tool that is used by installing the power on the floor of the house by supplying power with the power cord 305 connected to the controller 300 to generate heat.

  The main body 200 of the electric warming tool 100 is composed of a laminate in which sheet-like constituent members of a surface material 210, a heater unit 220, a heat insulating sheet 230, and a back material 240 are laminated.

  The heater unit 220 is a heat source of the electric warming tool 100, and is formed by arranging and fixing the heater wire 400 in a meandering shape on one side of a soaking sheet (not shown) whose main component is aluminum. .

  The soaking sheet is a member for the purpose of uniformly diffusing the heat generated by the heater wire 400 over the entire surface of the main body 200, and has a thickness of about 0.01 mm whose main component is aluminum which is a metal sheet having high thermal conductivity. It is an aluminum sheet.

  As shown in FIG. 2, in the heater wire 400, a temperature detection wire 402 for detecting a temperature is wound around a central glass fiber 401 in a spiral shape, and an insulating layer 403 is formed of nylon resin on the outer periphery thereof. A heating wire 404 is spirally wound on the outer periphery of the wire, a PVC insulating layer 405 is formed on the outer periphery, and an adhesive layer 406 made of polyethylene resin is formed on the outer periphery of the insulating layer.

  As shown in FIG. 1, the heater unit is arranged so that the heating range is divided into two heating areas, area A and area B, and heats approximately half the area of the main body 200. Two heating areas can be selected, and the controller 300 can selectively operate heating of both heating areas and heating of only one of the heating areas.

  Both ends of the heater wire 400 disposed in each heating area of the heater unit 220 are introduced into the controller 300 installed at the corner of the main body 200, and the heater wire 400 is connected to the control board 330 built in the controller 300. The heating line 404 and the temperature detection line 402 are respectively connected to predetermined terminals, and power is supplied from the controller 300 to the heating line 404, and the resistance of the temperature detection line 402 is detected by the controller, whereby the temperature of the main body 200 is detected. It is configured to detect changes.

  In the electric warming tool of the present embodiment having the above-described configuration, the power cord 305 is connected to a power outlet, and the power knob 241 is slid leftward to start energization of the heater of the main body 200. The temperature is raised to the specified temperature. The temperature of the main body 200 can be adjusted by sliding the temperature setting knob 241.

  The heater wire 400 of the main body 200 is divided into two parts, and two heating areas of area A and area B are provided. Normally, both areas are heated at the same time. However, when the electric warming tool 100 is used by one person, etc., when heating in a narrow range is sufficient, when the area switching button 343 is pushed, the heating area Can be switched. When the area switching button 343 is pushed once, only the area A is heated, when pushed twice, only the area B is heated, and when pushed three times, both areas are heated again. Further, the display of the two area indicator lamps 344 is switched according to the switching of the heating area.

<2> Controller Configuration FIG. 3 is a perspective view showing the appearance of the controller, FIG. 4 is a perspective view from above the lower case of the controller, and FIG. 5 is a perspective view from below the upper case of the controller. 6 is a detailed perspective view of the second partition wall, FIG. 7 is a view taken in the direction of arrow C indicated by arrow C in FIG. 5, and FIG. 8 is a bottom view of the controller with the control board and main body attached to the upper case. FIG. 9 is a cross-sectional view of the controller in a completed state of the electric warmer.

  The controller 300 includes a case 301 in which a substantially box-like upper case 310 molded from a flame-retardant resin material and a substantially flat lower case 320 are superposed, and a control board 330 installed in the upper case 310. The upper case 310 is provided with a plurality of operation knobs, operation buttons, and indicator lamps for operating the controller 300.

  As shown in FIG. 3, a power operation knob 341 for operating the power on / off of the electric warming tool 100 by sliding in the lateral direction at the corner between the front surface and the top surface of the controller 300, and the temperature A temperature setting knob 342 for setting is provided. By sliding the power operation knob 341 and the temperature setting knob 342 in the horizontal direction, a power switch (not shown) and a slide resistor (not shown) installed on the control board 330 built in the controller 300 are operated. It is the composition to do.

  In this embodiment, as shown in FIG. 3, the side on which the power operation knob 341 and the temperature setting knob 342 are arranged is the front, the opposite direction is the rear, the right side is the right and the rear is the rear from the front to the rear. The arrangement of each component will be described with the left side as the left side.

  Further, an area switching button 343 for selecting and switching the heating area of the main body 200 is installed on the upper surface of the controller 300. When the area switching button 343 is pressed from above, a push-type switch (not shown) installed on the control board 330 built in the controller 300 is driven to perform a switching operation. .

  In the vicinity of the area switching button 343, two area indicator lamps 344 for displaying the heating area are installed.

  A control board 330 incorporated in the controller 300 is provided with a plurality of switches operated by operation knobs and operation buttons, an indicator lamp composed of LEDs, and a plurality of circuit components forming a control function.

  As shown in FIG. 4, the lower case 320 has a peripheral wall 322 having a low height along the outer periphery of a substantially rectangular bottom plate 321. A substantially L-shaped holding rib 323 is integrally formed on the left side and the rear side inward by a predetermined dimension from the outer periphery. On the upper end of the holding rib 323, protrusions 323a and recessed holes 323b for holding the back material 240 of the main body 200 are alternately formed.

  A space surrounded by the peripheral wall 322 and the holding rib 323 is an accommodation space 325 for installing the control board 330 and the like, and a space formed in an approximately L shape outside the rear and left holding ribs 323 is the main body 200 and the controller. This is a bonding space 326 for bonding 300.

  A plurality of screw holes 327 for fixing the upper case 310 and the lower case 320 with screws (not shown) are formed inside the accommodation space 325.

  As shown in FIG. 5, the upper case 310 has a substantially box-like shape with an open bottom surface, and the top plate 311 has a left-side edge and a rear edge cut out in a substantially L shape. A peripheral wall 312 is integrally formed on the front edge and the right edge of 311 along the outer periphery. A holding rib 313 having a low height is integrally formed on the left edge and the rear edge cut out in a substantially L shape, and a protrusion 313 a for holding the back surface material 240 of the main body 200 is formed on the upper end of the holding rib 313. The recessed holes 313b are alternately formed.

The peripheral wall 312 and the holding rib 313 of the upper case 310 are formed in a shape facing the peripheral wall 322 and the holding rib 323 of the lower case 320.

  In the vicinity of the left edge and the rear edge of the upper case where the holding rib 313 is disposed, a partition wall 314 is molded inward by a predetermined dimension from the outer periphery. A part of the rear side of the partition wall 314 is bent forward to form a recessed portion 314a.

  A space surrounded by the peripheral wall 312 and the partition wall 314 is a storage space 315 for installing the control board 330 and the like, and a space formed in a substantially L shape outside the partition wall is a joint space 316 for joining the main body 200 and the controller 300. is there.

  Inside the accommodation space 315, a plurality of screw receivers 315a for fixing the upper case 310 and the lower case 320 with screws (not shown) are formed.

  The recessed portion 314a is formed to introduce the heater wire 400 of the main body 200 into the accommodation space 315 of the controller 300, and a first partition 317 is integrally formed on the front side of the recessed portion 314a. A second partition 318 is formed behind the first partition 317 with a substantially parallel gap. As shown in FIG. 6, the second partition 318 is formed as a separate member from the upper case 310, and a plate-like member molded from the same resin material as the upper case 310 is fitted and fixed at a predetermined position.

  In the first partition wall 317, four vertical introduction grooves 317a cut in a substantially vertical direction from the end portions are formed at intervals.

  Further, as shown in FIG. 6, the second partition 318 has a vertical portion 318a formed by cutting substantially vertically from the end portion, and is formed continuously with the vertical portion 318a, Four substantially bowl-shaped bowl-shaped introduction grooves 318c having parallel portions 318b formed in parallel are formed at intervals.

  Four positioning ribs 319 used for positioning the heater wire 400 extending from the main body 200 are integrally formed behind the second partition 318. The positioning rib 319 is integrally formed with a positioning groove 319a cut substantially vertically from the end of a substantially rectangular rib, and the four positioning ribs 319 are arranged at intervals.

  As shown in FIG. 3, a substantially rectangular operation space 311 a in which an area switching button 343 and an area indicator light 344 are arranged is formed on the top surface of the top plate 311 of the upper case. Further, an adhesive space 311b for adhesively fixing the surface material 210 of the main body 200 is formed on the rear side. The adhesive space 311b is formed by an inclined surface that is inclined toward the outer periphery.

  As shown in FIG. 9, when the upper case 310 and the lower case 320 are overlapped, the peripheral walls 312 and 322 and the holding ribs 313 and 323 are in contact with each other, and the partition 314 of the upper case The first partition 317, the second partition 318, and the positioning rib 319 have tips that contact the bottom surface of the lower case 320. The accommodation space of the upper case 310 and the accommodation space 325 of the lower case 320, and the joint space 316 of the upper case and the joint space 326 of the lower case are connected to form an integrated space, and the internal space of the case 301 is accommodated. A space partitioned by the portion 302 and the joint portion 303 is formed.

FIG. 7 shows a rear view of the recessed portion indicated by arrow C in FIG. 5. As shown in FIG. 7, the vertical introduction groove 317a of the first partition wall 317 and the bowl-shaped introduction groove 318c of the second partition wall 318 are shown in FIG. They are formed at positions that do not overlap each other. By adopting such a configuration, the upper case 31
The interior of the zero storage space 315 is configured so that it cannot be directly viewed from the outside of the controller 300. When the control board 330 stored in the storage space 315 ignites, the first partition 317 and the second partition 317 formed of a flame retardant material are used. The partition wall 318 makes it difficult to ignite the main body 200.

  FIG. 8 shows a state in which the main body 200 is joined to the upper case 310 on which the control board 330 is installed, and the heater wire 400 is connected to the control board 330.

  As shown in the figure, a control board 330 is installed in the accommodation space 315 of the upper case 310 and fixed with a plurality of screws 331.

  The main body 200 is installed in the joining space 316. The corners of the main body 200 are cut according to the shape of the accommodation space 315, and the back material 240 of the main body 200 is disposed in the joining space.

  The heater wire 400 extended from the main body 200 is cut into a predetermined length. The heater wire 400 extending from the main body 200 is pushed into the positioning groove 319a of the positioning rib 319, and then pushed from the vertical portion 318a of the bowl-shaped introduction groove 318c of the second partition 318 and accommodated in the parallel portion 318b. Next, the heater wire is bent into a substantially U shape within a gap formed between the first partition 317 and the second partition 318, and is then pushed into the vertical introduction groove 317a of the first partition 317.

  The insulating layer 403 and the insulating layer 405 are peeled off at the front end portion of the heater wire 400 to expose the temperature detection wire 402 and the heating wire 404, and each end portion is joined to a predetermined terminal of the control board 330 by soldering. .

  As shown in FIG. 9, in a state where the lower case 320 is combined with the upper case 310 on which the control board 330 is installed, the control board 330 is installed in a state where it is disposed at the lower end portion of the upper case 310.

  The surface material 210 of the main body 200 is adhesively fixed to the adhesive space 311b of the upper case 310 via an adhesive, and the back surface material 240 is sandwiched between the holding rib 313 of the upper case 310 and the holding rib 323 of the lower case 320. ing. In particular, the back material 240 is securely fixed by projections 313a and 323a formed in the holding ribs 313 and 323 and recessed holes 313b and 323b.

  As described above, the controller of the electric warming device in the present embodiment can prevent the heater wire from floating above the partition wall by holding the heater wire in the parallel part of the saddle type introduction groove. When the case and the lower case are overlapped, it becomes possible to prevent the heater wire from getting caught between the end of the partition wall of the upper case and the bottom plate of the lower case. It is possible to provide a controller for an electric warmer that can suppress the occurrence of abnormality and has high safety and reliability.

  In addition, the introduction grooves provided in the plurality of partition walls are arranged at different horizontal positions, so that when the control board accommodated in the controller is ignited, the openings of the introduction grooves provided in the respective partition walls are different from each other. It becomes possible to suppress the fire ignited by the controller from igniting the main body, and the safety can be further improved.

In addition, by arranging the heater wire bent in a substantially U shape within the gap formed between the partition walls, the heater wire can be more reliably prevented from floating above the partition wall, and the heater wire can be damaged. Or, if it becomes necessary to cut the heater wire due to a failure in the connection work, it becomes possible to extend the part bent in a substantially U shape and connect it to the control board, thereby improving the reliability and maintainability of the controller. Can be improved.

  In the present embodiment, the partition has a double configuration of the first partition and the second partition. However, the present invention is not limited to this. For example, the triple partition having the third partition provided outside the second partition. What is necessary is just a structure provided with the some partition more than double, such as a structure.

  In the present embodiment, the second partition is formed as a separate member and joined to the upper case. However, the present invention is not limited to this, and a structure integrally molded with the upper case may be used. This configuration can be selected depending on the molding conditions of the upper case and the mold configuration.

  In this embodiment, the control board is installed in the upper case and the partition is arranged in the upper case. However, the present invention is not limited to this, and the control board is installed in the lower case and the partition is installed in the lower case. It is good also as a structure arrange | positioned. Further, the partition wall may be divided into an upper case and a lower case, and the upper case and the lower case may be in contact with each other.

  As described above, since the controller of the electric warming tool according to the present invention can suppress the biting of the heater wire, it can be applied to applications such as controllers of other electric devices.

DESCRIPTION OF SYMBOLS 100 Electric heating device 200 Main body 300 Controller 301 Case 302 Storage part 303 Joint part 310 Upper case 312 Perimeter wall 314 Partition 317 First partition (partition)
317a Vertical introduction groove 318 Second partition (partition)
318a Vertical portion 318b Parallel portion 318c Vertical guide groove 320 Lower case 322 Peripheral wall 330 Control board 400 Heater wire

Claims (3)

A case in which a substantially box-shaped upper case with an opening on the lower surface and a substantially box-shaped lower case with an opening on the upper surface are stacked one above the other;
A control board housed in the case;
A heater wire connected to the control board,
The case includes a housing portion that houses the control board, and a joint portion that faces a part of the outer periphery of the case and joins the main body of the electric warmer,
At least one of the upper case and the lower case is provided with a plurality of partition walls that divide the housing portion and the joint portion and are provided with a gap substantially in parallel,
The partition includes a plurality of introduction grooves into which the heater wire can be inserted from an end portion,
The at least one partition wall has an opening at the end portion of the partition wall, a vertical portion formed substantially perpendicular to the end portion, and formed continuously from the vertical portion, and substantially parallel to the end portion. A parallel portion, and a bowl-shaped introduction groove formed by
Electric warmer controller. The introduction grooves provided in the plurality of partition walls are arranged at mutually different horizontal positions, and the housing portion of the case cannot be directly viewed through the introduction groove from the outside of the case,
The controller of the electric warming tool of Claim 1. The heater wire is disposed by being bent in a substantially U shape within at least one gap formed between the partition walls.
The controller of the electric warming tool according to claim 1 or 2.

Images