Cooling device

Abstract

To provide a cooling device that allows for easy separation of the housing and the ring fastener, without the ring fastener becoming difficult to remove due to dust or other debris. [Solution] The ring fastener 50 is provided with a plurality of guide rails 60 that extend in an arc shape from one end to the other along the ring-shaped end face. The ring fastener 50 is also provided with a groove 53 in the axial direction. On the other hand, the outer circumferential surface of the shaft portion 35 of the unit body 15 is provided with a flange 36 and a plurality of projections 40 that protrude outward. When the ring fastener 50 is fitted onto the shaft portion 35 and moved toward the flange 36 side, the projections 40 pass through the groove 53. When the ring fastener 50 is then rotated, the projections 40 overcome the restricting portion 61 of the guide rail 60 and are accommodated in the step surface 62.

Description

【Technical Field】 【0001】 The present invention relates to a cooling device with a fan that is attached to a cooling garment having a circular mounting hole portion. 【Background Art】 【0002】 As one of the heatstroke prevention measures for protecting workers, a cooling garment that cools the body to regulate body temperature is known. The cooling garment is provided with a mounting hole portion for attaching a cooling device such as a blower device or a Peltier element unit, and the peripheral edge portion of the mounting hole portion is fixed by sandwiching it between a flange provided on the outer periphery of the cylindrical housing on the cooling device side and a ring-shaped sleeve. This fixing method is various, and there are those with a screw structure in which a male screw is provided on the outer periphery of the housing and a female screw is provided on one sleeve side, and those with a latch structure in which a latch groove is provided on the outer periphery of the housing and a protrusion fitting into the latch groove is provided on the sleeve side. 【0003】 Among these, as a technique having a latch structure, for example, Patent Document 1 discloses a garment to which a blower device is detachable. A plurality of guide rails are provided on the outer peripheral surface of the cylindrical housing of the blower device. The guide rails are arc-shaped along the circumferential direction of the cylindrical housing, and a notch is provided between adjacent guide rails. Each guide rail is provided with a plurality of mounting grooves between the guide rail and the flange of the housing, and a protrusion is provided between the mounting grooves. On the other hand, protrusions are provided on the inner peripheral surface of the ring-shaped sleeve at intervals in the circumferential direction. When attaching the blower device to the garment, the protrusion of the sleeve is inserted into the notch of the housing, and the two are relatively rotated so that the protrusion on the sleeve side is accommodated in any of the mounting grooves. 【0004】 Further, Patent Document 2 discloses a temperature adjustment wearing tool to which a Peltier element unit can be attached to a mounting hole portion. The Peltier element unit is a unit including a Peltier element, a heat radiating plate that abuts on the Peltier element, and a fan that exhausts heat from the heat radiating plate to the outside. 【0005】 The Peltier element unit in Patent Document 2, like the blower in Patent Document 1, has multiple guide rails on the outer circumferential surface of a cylindrical housing. The guide rails are arc-shaped along the circumferential direction of the cylindrical housing, and a sliding surface is provided on the guide rail surface on the flange side of the housing, with multiple restricting parts protruding from the sliding surface. On the other hand, a projection is provided on the inner circumferential surface of the ring fastener (corresponding to the sleeve in Patent Document 1). When attaching the Peltier element unit to the mounting hole, the ring fastener and the housing are rotated relative to each other, causing the projection of the ring fastener to move on the sliding surface. The projection overcomes the restricting parts and fastens. [Prior art documents] [Patent Documents] 【0006】 [Patent Document 1] Japanese Patent Publication No. 2018-104845 [Patent Document 2] Patent No. 7497934 [Overview of the Initiative] [Problems that the invention aims to solve] 【0007】 Both the blower described in Patent Document 1 and the Peltier element unit described in Patent Document 2 have fans. Airflow is generated inside and outside the housing. These devices are mainly used for work clothes worn outdoors in the scorching sun, and the flowing air contains fine particles such as dust and sweat. In the fastening of screw structures, if dust or other particles get between the male and female threads, it becomes difficult to remove. If the screw structure is made of resin, which is softer than dust and other particles, the dust and other particles can get caught in the resin, making removal extremely difficult. 【0008】 On the other hand, the latch structure has the advantage that even if dust gets stuck, it is relatively easier to remove than the screw structure because a gap is created due to the elasticity of the peripheral material of the mounting hole 10 when the ring fastener is pushed towards the flange side. 【0009】 However, even with a latch structure, it is not possible to directly remove dust and other debris that has entered the sliding surface of the guide rail, the space between the mounting groove and the projection, or the inner circumferential surface of the ring fastener, which can make removal difficult. 【0010】 The present invention has been made in view of the above, and aims to provide a cooling device that prevents difficulty in removing the ring fastener due to dust or the like, and that allows for easy separation of the unit body and the ring fastener. [Means for solving the problem] 【0011】 According to the present invention, a cooling device is provided which a fan circulates air inside the unit body between a first ventilation section and a second ventilation hole, and which can be attached to an attachment hole provided in a cooling garment, A flange protruding outward from the outer circumferential surface of the cylindrical shaft portion of the unit body, The upper and lower ring-shaped end faces are provided with a plurality of guide rails extending in an arc shape from one end to the other along the ring-shaped end face, and the other ring-shaped end face has a ring fastener facing the flange. The shaft portion is provided with a plurality of protrusions that project outward in the circumferential direction on its outer surface. The ring fastener is provided with a groove in the axial direction through which the projection passes from the other ring-shaped end face to the one ring-shaped end face when the ring fastener is inserted into the shaft and moved toward the flange side. Each of the plurality of guide rails is characterized in that a plurality of step surfaces for accommodating the projection are intermittently provided on the side opposite to the flange, along from one end to the other, and further, a plurality of restricting parts for restricting the movement of the projection are provided between the step surfaces. [Effects of the Invention] 【0012】 According to the present invention, when the flange of the unit body and the ring fastener clamp the edge of the mounting hole, the projection provided on the unit body side appears on the step surface of the ring fastening guide rail, which is located on the opposite side of the flange, rather than on the side facing the flange. Therefore, even if dust or other debris accumulates and becomes stuck between the projection and the step surface, it can be easily cleaned. [Brief explanation of the drawing] 【0013】 [Figure 1] This figure shows a cooling garment to which a Peltier element unit is attached. [Figure 2] This is a diagram showing a Peltier element unit. [Figure 3] This is a diagram showing a cross-section of a Peltier element unit. [Figure 4] This figure illustrates another embodiment. [Modes for carrying out the invention] 【0014】 In Figures 1A and 1B, the cooling garment 1 has attachment holes 10 on the left and right sides of the sides below the armpits. Attachment holes 10 are also provided at the neckline (nape of the neck) of the stand-up collar 6. In this embodiment, the cooling device 20 is a Peltier element unit that cools the body using a Peltier element. 【0015】 Figure 2 shows the cooling device 20. FIG. 2A is a perspective view, FIG. 2B is a view showing a state in which the main body portion and the ring fastener are separated, FIG. 2C is a bottom view of the unit main body, FIG. 2D is a plan view of the ring fastener, and FIG. 2E is a bottom view of the ring washer. The unit main body 15 has a top portion 22 and a shaft portion 35. In plan view, the top portion 22 has an octagonal umbrella shape. The inclined surface portions 24 to 30 gently inclined from the central surface 23 of the top portion 22 continue to the skirt edge R. Ventilation holes 31a are provided in a direction perpendicular to the central axis C (the direction along the surface of the cooling garment 1, hereinafter referred to as the flow direction ex). The ventilation holes 31a open to the first ventilation portion 31 that descends from the central surface 23 downward toward the central axis C, and a guiding surface portion 32 that continues flatly from the first ventilation portion 31 to the skirt edge R is provided. Hereinafter, unless otherwise specified, the lower side in the drawing in the direction of the central axis C is simply referred to as the "lower side", and the upper side in the direction of the central axis C is simply referred to as the "upper side". 【0016】 The shaft portion 35 extending downward from the top portion 22 is cylindrical with a central axis C having a smaller diameter than the top portion 22. The shaft portion 35 has a flange 36, a neck portion 37, a second ventilation portion 38, and a Peltier portion 39 from the central axis C. The second ventilation portion 38 has a tapered slope approaching the central axis C as it goes downward, and has a plurality of ventilation holes 38a opened to take in air into the unit main body 15, and frame portions 38b and 38c connecting the neck portion 37 and the Peltier portion 39. The frame portion 38b is provided at a predetermined angular interval (in the figure, 90-degree intervals; see FIG. 1C), and each has a wider circumferential width than the frame portion 38c. Each of the frame portions 38b is provided with a protruding portion 40 protruding toward the outer periphery. 【0017】 Referring to FIGS. 2B, 2D, and 2E, a plurality of concave grooves 54 are formed on the outer peripheral surface 52 of the ring fastener 50, which has a good finger grip and can be stably operated. On the inner peripheral surface 51 of the ring fastener 50, grooves 53 in the direction of the central axis C are provided at equal angular intervals (in the figure, 90-degree intervals). The groove 53 is set to be larger than the circumferential width of the protruding portion 40. 【0018】 The upper ring-shaped end face 55 of the ring fastener 50 faces the flange 36 and sandwiches the peripheral portion of the mounting hole portion 10. On the upper ring-shaped end face 55 of the ring fastener 50, biasing protrusions 57 biased upward are provided at equal angular intervals (in the figure, at 90-degree intervals). 【0019】 On the lower ring-shaped end face 56 of the ring fastener 50, a plurality of guide rails 60 are provided sandwiching the groove 53. The guide rails 60 are arc-shaped and extend in an arc from one end to the other end along the ring-shaped end face 56. The lower side of the guide rail 60 is an exposed arc-shaped surface, and a plurality of step surfaces 62 with heights changing in order in the direction of the central axis C are intermittently provided along from one end to the other end. Between each of the step surfaces 62, a plurality of regulating portions 61 protruding downward are provided. 【0020】 FIG. 3 is a diagram showing a cross-section of the cooling device 20. Referring to FIG. 3A, the proximal end of the wiring cord 58 for supplying power to the cooling device 20 is stopped by the stopper 41, and the stopper 41 is fixed so as not to be detached from within the unit body 15. At the top portion 22 of the position of the wiring cord 58, a recessed portion 42 surrounding the wiring cord 58 with a bridge-shaped inner wall surface is provided. The recessed portion 42 is a portion where a part of the flange 36 is recessed upward. When the cooling device 20 is attached to the mounting hole portion 10, most of the peripheral portion of the mounting hole portion 10 is sandwiched by the flange 36 and the upper ring-shaped end face 55, but in the recessed portion 42, it rides on the wiring cord 58 and迂回. The peripheral portion of the mounting hole portion 10 that迂回 the wiring cord 58 takes shelter between the inner wall surface of the recessed portion 42 and the wiring cord 58. 【0021】 The Peltier portion 39 of the shaft portion 35 is a portion where a Peltier element 43 is attached inside. A heat transfer plate 44 abuts on the lower side of the Peltier element 43. The heat transfer plate 44 cools the body of the wearer by contacting the body of the wearer. On the other hand, a heat radiation fin 45 abuts on the upper surface of the Peltier element 43. The heat radiation fin 45 transmits the heat generated from the Peltier element 43. The heat transfer plate 44 and the heat radiation fin 45 are formed of a metal such as aluminum, for example. 【0022】 A fan 46 is mounted inside the top portion 22. The fan 46 is located directly above the heat dissipation fins 45 and blows air from the vent 38a to the vent 31a. The heat dissipation fins 45, which are heated by the Peltier element 43, are cooled by this airflow. 【0023】 When attaching the cooling device 20 to the mounting hole 10 of the cooling garment 1, the top portion 22 and flange 36 are positioned above the mounting hole 10, while the lower part from the shaft portion 35 remains below the mounting hole. The flange 36 is in contact with the peripheral edge of the mounting hole 10 from above. 【0024】 The ring fastener 50 is fitted onto the shaft portion 35 from below. The groove 53 of the ring fastener 50 is aligned with the position of the projection 40, and the ring fastener 50 is brought closer to the flange 36 side. When the ring fastener 50 is moved towards the flange 36 side, the projection 40 passes through the groove 53 from the upper ring-shaped end face 55 side to the lower ring-shaped end face 56 side, and appears on the ring-shaped end face 56 side. Then, when the ring fastener 50 is rotated around the central axis C, the projection 40 overcomes the first restricting portion 61 and is housed on the lowest step surface 62 of the guide rail 60. As the ring fastener 50 is rotated, it overcomes each restricting portion 61 one by one and moves to the step surfaces 62 which are gradually getting higher (Figures 3C and 3D). As a result, the gap between the ring fastener 50 and the flange 36 narrows, and the clamping force on the mounting hole portion 10 increases. Furthermore, the height of the highest step surface 62 should be set to a height such that the biasing projection 57 of the ring fastener 50 is pressed against the flange 36. This height ensures that the ring fastener 50 is stably fixed to the unit body 15 when the cooling device 20 is stored on its own. 【0025】 In this embodiment, when the flange 36 of the unit body 15 and the ring fastener 50 clamp the edge of the mounting hole 10, the projection 40 provided on the unit body 15 side appears on the step surface 62 of the guide rail 60 of the ring fastener 50, which is located on the opposite side of the flange 36, rather than on the side facing the flange 36. Even if dust or other debris accumulates and becomes stuck between the projection 40 and the step surface 62, it can be easily cleaned. Furthermore, the second ventilation section 38 on which the projection 40 is provided is tapered and recedes toward the central axis C. As a result, there is a gap between the ring fastener 50 and the frame sections 38b and 38c, preventing dust and debris from accumulating. 【0026】 When the fan 46 is activated, air from inside the cooling garment 1 is drawn into the shaft portion 35 through the ventilation holes 38a. A height h1 (Figure 3A) in the direction of the central axis C of the ring fastener 50 is secured between the ventilation holes 38a and the periphery of the cooling garment 1, so that the periphery of the cooling garment 1 does not block the ventilation holes 38a. Inside the top portion 22, the airflow from the fan 46 is changed in direction from the direction of the central axis C to the flow direction ex by the inclined surfaces 24 to 28 and 33, 34, and guided to the ventilation holes 31a. 【0027】 The cooling device 20 in this embodiment is applied to a Peltier element unit in which the ring fastener 50 is attached from the lower side of the mounting hole (the side facing the wearer's body surface). In the Peltier element unit, it is desirable that the protrusion height of the portion that protrudes from the lower side of the mounting hole 10 be low. This is because if the distance between the mounting hole 10 (i.e., the cooling garment 1) and the body surface is too great. Because the second ventilation portion 38 is tapered, the closer the ring fastener 50 is to the flange 36, the wider the gap s (Figure 3C) between the inner circumferential surface 51 of the ring fastener 50 and the second ventilation portion 38 becomes, and an air passage can be secured through this gap s. Therefore, even if the range of the ventilation hole 38a overlaps with the height h1 in the direction of the central axis C of the ring fastener 50, an air passage can be secured between the ring fastener 50 and the frame, as shown by the dashed line P. This has the effect of reducing the protrusion height of the cooling device 20 that protrudes from the lower side of the mounting hole 10. 【0028】 Figure 4 shows a cooling device 70 of another embodiment. In the above embodiment, the ventilation holes 31a were oriented in the flow direction ex along the surface of the cooling garment 1, but the cooling device 70 opens in a direction along the central axis C, allowing air to flow upward (see dashed line P) and aligning with the direction of the central axis C. Furthermore, the ring fastener 50 of the cooling device 70 is attached from the upper side of the mounting hole 10 (outside the cooling garment). In the figure, parts common to the previously mentioned embodiment are denoted by the same reference numerals and their explanation is omitted. 【0029】 Figure 4A is a cross-sectional view, Figure 4B is a plan view of the unit body 75, and Figure 4C is a plan view of the ring fastener 50. The unit body 75 has a top portion 71 and a shaft portion 35. In plan view, a ventilation hole 31a is provided in the top portion 71. A cylindrical shaft portion 35 continues downward from the top portion 71, and the shaft portion 35 has, from top to bottom, a neck portion 37, a flange 36, and a second ventilation portion 38. In the middle of the shaft portion 35, projections 40 are provided between the top portion 71 and the flange 36 at equal angular intervals (90-degree intervals in the figure) and project outward toward the outer circumference. This differs from the previous embodiment in that the projections 40 are provided above the flange 36. 【0030】 The ring fastener 50 faces the flange 36 and sandwiches the mounting hole 10 from above. Multiple guide rails 60 are provided on the upper side of the ring fastener 50, flanking a groove 53. Multiple step surfaces 62 are provided on the upper side of the guide rails 60, with their heights changing sequentially in the direction of the central axis C. Restricting portions 61 protruding upward are provided between each step surface 62. 【0031】 In this embodiment, the projection 40 is visible on the upper step surface 62 of the ring fastener 50, and even if dust or other debris accumulates and becomes stuck between the projection 40 and the step surface 62, the dust or debris can be easily cleaned. 【0032】 In the above embodiments, a cooling element unit equipped with a Peltier element was shown as an example of the cooling device 20, but it may also be applied to a blower device such as the one shown in Patent Document 1. [Explanation of Symbols] 【0033】 1 cooling garment 3 flanges 6 standing collar 10 Mounting hole 15 Unit body 20 Cooling device 21 Unit body 22 Top of the head 23 Central plane 24-30, 33, 34 Slope section 31 First ventilation section 31a Ventilation holes 32 Guiding surface section 35 Shaft section 36 Flange 37 Neck 38. Second ventilation section 38a Ventilation holes 38b, 38c frame 39 Peltier section 40 Protrusion 41 Stopper 42 Recessed area 43 Peltier element 44 Heat transfer plate 45 heat dissipation fins 46 Fans 50 Ring fasteners 51 Inner surface 52 Outer surface 53 Groove 54 groove 55 Upper ring-shaped end face 56 Lower ring-shaped end face 57 Biasing protrusion 58 Wiring cord 60 Guide Rails 61 Regulatory Department 62 Stepped Surfaces 70 Cooling device 71 Top of the head 75 Unit Body

Claims

[Claim 1] A cooling device equipped with a fan that circulates air inside the unit body between a first ventilation section and a second ventilation hole, which can be attached to an attachment hole provided in a cooling garment, A flange protruding outward from the outer circumferential surface of the cylindrical shaft portion of the unit body, The upper and lower ring-shaped end faces are provided with a plurality of guide rails extending in an arc shape from one end to the other along the ring-shaped end face, and the other ring-shaped end face has a ring fastener facing the flange. The shaft portion is provided with a plurality of protrusions that project outward in the circumferential direction on its outer surface. The ring fastener is provided with a groove in the axial direction through which the projection passes from the other ring-shaped end face to the one ring-shaped end face when the ring fastener is inserted into the shaft and moved toward the flange side. A cooling device characterized in that each of the plurality of guide rails has a plurality of step surfaces intermittently provided on the side opposite to the flange, along from one end to the other, for accommodating the projection, and further, a plurality of restricting parts are provided between the step surfaces to restrict the movement of the projection. [Claim 2] In the cooling device according to claim 1, The cooling device is a cooling device in which the flange clamps the mounting hole from above and the ring fastener clamps the mounting hole from below, The cooling device is characterized in that the shaft portion has the flange and a second ventilation portion from above, and the second ventilation portion has a tapered slope that approaches the central axis of the shaft portion as it goes downwards.

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