Backpack unit

Abstract

To disclose a technology which can inhibit a user from feeling hotness when the user carries a back pack unit on its back.SOLUTION: A back pack unit includes: a body; and a base member having cooling ports. The base member includes: a back plate attached to the body; and a harness which is attached to the back plate and worn by a user. The harness includes: at least one shoulder belt attached to a shoulder of the user; and a cooling fan. The cooling fan causes cooling air to flow into or out from the back pack unit through the cooling ports of the base member.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a backpack unit. [Background technology]

[0002] Patent Document 1 discloses a backpack-type unit. The backpack-type unit includes a main body and a base member. The base member includes a back board attached to the main body and a harness attached to the back board and worn by the user. The harness includes at least one shoulder belt worn on the user's shoulders. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-109303 Summary of the Invention [Problem to be solved by the invention]

[0004] When a user wears such a backpack-type unit on their back, heat may build up where the base member comes into contact with the user's body, causing the user to feel hot. This specification discloses a technology that can prevent the user from feeling hot when wearing a backpack-type unit on their back. [Means for solving the problem]

[0005] The backpack-type unit disclosed herein includes a main body and a base member having a cooling port. The base member includes a back panel attached to the main body and a harness attached to the back panel and worn by a user. The harness includes at least one shoulder strap worn on the user's shoulders and a cooling fan. The cooling fan directs cooling air in and out through the cooling port in the base member.

[0006] According to the above configuration, the cooling fan can be operated while the user is wearing the backpack-type unit, thereby cooling the user's body, thereby preventing the user from feeling too hot when wearing the backpack-type unit. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of the backpack-type unit 2 of the first embodiment. [Figure 2] FIG. 2 is a rear view of the base member 6 of the first embodiment. [Figure 3] FIG. 2 is a front view of the base member 6 of the first embodiment. [Figure 4] FIG. 1 is a front view of the base member 6 of the first embodiment with the shoulder belts 38 and waist belt 42 open. [Figure 5] FIG. 2 is a cross-sectional view of the harness 16 of the first embodiment with the shoulder belt 38 and waist belt 42 open. [Figure 6] FIG. 10 is a front view of a base member 6 of a second embodiment. [Figure 7] FIG. 10 is a cross-sectional view of the harness 16 of the second embodiment with the shoulder belt 38 and waist belt 42 open. [Figure 8] FIG. 10 is a front view of the back plate 14 of the third embodiment. [Figure 9] FIG. 10 is a front view of a base member 6 of a third embodiment. [Figure 10] FIG. 10 is a front view of a base member 6 of a fourth embodiment. [Figure 11] FIG. 10 is a perspective view of a backpack-type unit 2 of a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Representative, non-limiting embodiments of the present invention will now be described in detail with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Additionally, additional features and inventions disclosed below can be used separately or in conjunction with other features and inventions to provide further improved backpack units, methods of making and using the same.

[0009] Furthermore, the combinations of features and steps disclosed in the following detailed description are not essential to practicing the invention in its broadest sense, but are described solely to specifically illustrate exemplary embodiments of the invention. Furthermore, the various features of the exemplary embodiments described above and below, and those described in the independent and dependent claims, do not necessarily have to be combined in the exact embodiments described herein, or in the exact order listed, to provide additional and useful embodiments of the invention.

[0010] All features described in this specification and / or claims are intended to be disclosed individually and independently of one another as limitations on the original disclosure and claimed particulars, apart from any configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregation descriptions are intended to disclose intermediate configurations thereof as limitations on the original disclosure and claimed particulars.

[0011] In one or more embodiments, the cooling port may be positioned near the user when the user is wearing the harness.

[0012] According to the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows near the user's body, which can further reduce the user's feeling of heat when wearing the backpack unit.

[0013] In one or more embodiments, when the user is wearing the harness, the cooling ports may face the user.

[0014] According to the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows along the surface of the user's body, which can further reduce the user's feeling of heat when wearing the backpack unit.

[0015] In one or more embodiments, the harness may further include a back pad that contacts the user's back when the user is wearing the harness, and the cooling ports may face the portion of the user's back that is in contact with the back pad when the user is wearing the harness.

[0016] When a harness includes a back pad, the back pad comes into contact with the user's back, which can easily trap heat in the user's back. According to the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows along the surface of the portion of the user's back that comes into contact with the back pad. This further reduces the user's feeling of heat when wearing the backpack-type unit.

[0017] In one or more embodiments, the harness may further include a back pad that contacts the user's back when the user wears the harness. When the user wears the harness, a non-contact space may be formed between the user's back and the backboard, where the back pad is not disposed. The cooling port may face the non-contact space when the user wears the harness.

[0018] When a harness is equipped with a back pad, the back pad comes into contact with the user's back, which tends to trap heat in the user's back. With the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows along the surface of the user's back in a non-contact space. This further reduces the user's feeling of heat when wearing the backpack-type unit.

[0019] In one or more embodiments, the cooling ports may be located in the shoulder belt.

[0020] When a user wears a backpack-type unit, the shoulder straps come into contact with the user's shoulders, which can easily cause heat to build up in the user's shoulders. With the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows along the surface of the user's shoulders. This can further reduce the user's feeling of heat when wearing the backpack-type unit.

[0021] In one or more embodiments, the harness may further comprise a waist belt that is worn around the waist of the user, and the cooling port may be located in the waist belt.

[0022] When the harness is equipped with a waist belt, the waist belt comes into contact with the user's waist, which tends to trap heat in the user's waist. With the above configuration, when cooling air flows in or out through the cooling port, the cooling air flows along the surface of the user's waist. This can further reduce the user's feeling of heat when wearing the backpack-type unit.

[0023] In one or more embodiments, the cooling fan may be located on the waist belt.

[0024] According to the above configuration, the cooling fan can be disposed without providing a separate member for disposing the cooling fan on the base member.

[0025] In one or more embodiments, the cooling fan may be located in the shoulder belt.

[0026] According to the above configuration, the cooling fan can be disposed without providing a separate member for disposing the cooling fan on the base member.

[0027] In one or more embodiments, the cooling fan may be located on the back plate.

[0028] According to the above configuration, the cooling fan can be disposed without providing a separate member for disposing the cooling fan on the base member.

[0029] In one or more embodiments, the backpack unit may further include an external power source to power the cooling fan.

[0030] According to the above configuration, the cooling fan can be operated even when power is not supplied from the main body to the cooling fan.

[0031] In one or more embodiments, the base member may include a mounting member to which an external power source can be attached.

[0032] According to the above configuration, the user can carry an external power source by carrying the backpack unit on his / her back.

[0033] In one or more embodiments, the body may be electrically connected to the cooling fan and be capable of supplying power to the cooling fan.

[0034] According to the above configuration, even if the backpack-type unit does not have an external power source that supplies power to the cooling fan, the cooling fan can be operated.

[0035] In one or more embodiments, the cooling fan may be configured to have an adjustable airflow rate.

[0036] According to the above configuration, the air volume of the cooling fan can be adjusted according to the degree of heat felt by the user.

[0037] In one or more embodiments, the body may be connectable to an electric implement having a motor. The body may be capable of supplying power to the motor of the electric implement.

[0038] According to the above configuration, when a user carries a backpack-type unit that supplies power to an electric work machine, the user can be prevented from feeling hot.

[0039] In one or more embodiments, the harness may include an air passageway in communication with the cooling port, and when the cooling fan is activated, cooling air may flow through the air passageway.

[0040] According to the above configuration, the cooling air flows through the air flow path, thereby cooling the harness, which further reduces the user's feeling of heat when wearing the backpack-type unit.

[0041] (First Example) A backpack-type unit 2 according to an embodiment will be described with reference to Figures 1 to 5. The backpack-type unit 2 is used by being carried on the back of a user. Hereinafter, when the backpack-type unit 2 is carried on the back of a user, the direction perpendicular to the user's back will be referred to as the front-to-back direction, the direction perpendicular to the front-to-back direction will be referred to as the up-to-down direction, and the direction perpendicular to both the front-to-back direction and the up-to-down direction will be referred to as the left-to-right direction.

[0042] As shown in FIG. 1 , the backpack-type unit 2 includes a main body 4 and a base member 6. The main body 4 is removably attached to the base member 6. In this embodiment, the main body 4 is a large backpack-type power supply device. The main body 4 weighs, for example, 5 to 10 kg. The main body 4 includes, for example, a rechargeable secondary battery. Charging power is supplied to the main body 4 from an external power source (not shown) connected to the main body 4. The main body 4 is connected to an electric work machine (not shown) having a motor via a connection cord 8, and supplies discharging power to the motor. A user can carry the backpack-type unit 2 on their back and work by holding the electric work machine in their hands. By using the backpack-type unit 2, the user can use the electric work machine for long periods of time.

[0043] A rotatable handle 10 is provided on the top of the main body 4. When the user is not carrying the backpack-type unit 2 on his / her back, the user can hold the handle 10. By holding the handle 10, the user can detach the main body 4 from the base member 6 and easily carry it around.

[0044] As shown in Fig. 2, the base member 6 includes a back plate 14 and a harness 16. The main body 4 (see Fig. 1) is detachably attached to the back plate 14. The back plate 14 includes a first back plate 18 and a second back plate 20.

[0045] The first back panel 18 has two lower engagement portions 22, one upper engagement portion 24, a right-side attachment portion 26, and a left-side attachment portion 28. The two lower engagement portions 22 are disposed near the lower end of the first back panel 18. The one upper engagement portion 24 is disposed near the upper end of the first back panel 18. When the main body 4 (see FIG. 1) is attached to the back panel 14, the two lower engagement portions 22 and the one upper engagement portion 24 engage with the front surface of the main body 4 (see FIG. 1). The right-side attachment portion 26 is disposed near the right end of the lower part of the first back panel 18. The left-side attachment portion 28 is disposed near the left end of the lower part of the first back panel 18.

[0046] The second back panel 20 is attached to the upper part of the first back panel 18 from the front side. The second back panel 20 protrudes from the upper part of the first back panel 18 on both the left and right sides. The second back panel 20 has two right-side mounting portions 32 and two left-side mounting portions 34. The two right-side mounting portions 32 are located on the right side of the upper part of the first back panel 18, and the two left-side mounting portions 34 are located on the left side of the upper part of the first back panel 18.

[0047] 3, the harness 16 is detachably attached to the back panel 14. The harness 16 is worn by a user when in use. The harness 16 includes at least one (two in this embodiment) shoulder belt 38, at least one (two in this embodiment) back pad 40, and a waist belt 42.

[0048] The shoulder belts 38 are made of a breathable fabric material that allows moisture to pass through. The two shoulder belts 38 include a right shoulder belt 44 and a left shoulder belt 46. When the harness 16 is worn on a user, the right shoulder belt 44 is worn on the user's right shoulder, and the left shoulder belt 46 is worn on the user's left shoulder. At this time, the contact surface 44a of the right shoulder belt 44 comes into contact with the user's right shoulder, and the contact surface 46a of the left shoulder belt 46 comes into contact with the user's left shoulder.

[0049] The back pad 40 is made of a breathable fabric material that allows moisture to pass through. The two back pads 40 include a right back pad 48 and a left back pad 50. When the harness 16 is worn by a user, the contact surface 48a of the right back pad 48 comes into contact with the upper right side of the user's back, and the contact surface 50a of the left back pad 50 comes into contact with the upper left side of the user's back. The right back pad 48 is formed integrally with the right shoulder belt 44. The left back pad 50 is formed integrally with the left shoulder belt 46.

[0050] As shown in FIG. 2 , the right back pad 48 is detachably attached to the second back panel 20 via the two right attachment portions 32 of the second back panel 20. The tip of the right shoulder belt 44 is detachably attached to the first back panel 18 via the right attachment portion 26 of the first back panel 18. The left back pad 50 is detachably attached to the second back panel 20 via the two left attachment portions 34 of the second back panel 20. The tip of the left shoulder belt 46 is detachably attached to the first back panel 18 via the left attachment portion 28 of the first back panel 18.

[0051] The waist belt 42 shown in Fig. 3 is made of a moisture-permeable fabric material that allows moisture to pass through. The waist belt 42 is detachably attached to the lower part of the first back panel 18. When the harness 16 is worn by a user, the waist belt 42 is worn around the user's waist. At this time, the contact surface 42a of the waist belt 42 comes into contact with the user's waist. In addition, a box-shaped attachment member 52 that is open at the top is detachably attached to the waist belt 42.

[0052] When a user works while wearing the backpack-type unit 2, heat tends to build up at the contact points between the user's body and the harness 16. This can cause the user to feel hot while working. The backpack-type unit 2 of this embodiment is equipped with a cooling structure 56 for cooling the user's body.

[0053] 3 to 5, the cooling structure 56 includes one or more (four in this embodiment) cooling fans 58 and a plurality of cooling ports 60. As shown in FIG. 3, the four cooling fans 58 are, for example, axial fans. The four cooling fans 58 are operated by power supplied from an external power supply 62 via a cable (not shown). The external power supply 62 is housed in the mounting member 52 and is thereby attached to the mounting member 52. The external power supply 62 includes a changeover switch 64 that switches the cooling fans 58 between an on state and an off state, and an airflow adjustment switch 66 that adjusts the airflow volume of the cooling fans 58. The airflow adjustment switch 66 is configured to switch, for example, between a strong airflow mode with a high airflow volume and a weak airflow mode with a low airflow volume.

[0054] The four cooling fans 58 include two shoulder-side cooling fans 70 and two waist-side cooling fans 72. The two shoulder-side cooling fans 70 include a right-shoulder-side cooling fan 70a and a left-shoulder-side cooling fan 70b. The right-shoulder-side cooling fan 70a is disposed on the non-contact surface 44b of the right shoulder belt 44. The non-contact surface 44b of the right shoulder belt 44 is the surface that does not come into contact with the user's right shoulder when the right shoulder belt 44 is fastened to the user's right shoulder, and is the surface opposite the contact surface 44a of the right shoulder belt 44. The left-shoulder-side cooling fan 70b is disposed on the non-contact surface 46b of the left shoulder belt 46. The non-contact surface 46b of the left shoulder belt 46 is the surface that does not come into contact with the user's left shoulder when the left shoulder belt 46 is fastened to the user's left shoulder, and is the surface opposite the contact surface 46a of the left shoulder belt 46.

[0055] The two waist-side cooling fans 72 include a right waist-side cooling fan 72a and a left waist-side cooling fan 72b. The right waist-side cooling fan 72a is located near the right end in the longitudinal direction of the non-contact surface 42b of the waist belt 42. The left waist-side cooling fan 72b is located near the left end in the longitudinal direction of the non-contact surface 42b of the waist belt 42. The non-contact surface 42b of the waist belt 42 is the surface that does not come into contact with the user's waist when the waist belt 42 is worn around the user's waist, and is the surface opposite the contact surface 42a of the waist belt 42.

[0056] 4, the multiple cooling ports 60 include one or more shoulder-side cooling ports 76, one or more back-side cooling ports 78, and one or more (ten in this embodiment) lumbar-side cooling ports 80. The one or more shoulder-side cooling ports 76 include one or more right shoulder-side cooling ports 82 and one or more left shoulder-side cooling ports 84.

[0057] The right shoulder-side cooling port 82 is arranged on the right shoulder belt 44. The one or more right shoulder-side cooling ports 82 include one or more (eight in this embodiment) first right shoulder-side cooling ports 86 and one or more (three in this embodiment) second right shoulder-side cooling ports 88 (see FIG. 5 ). The eight first right shoulder-side cooling ports 86 are arranged on the contact surface 44a of the right shoulder belt 44. The eight first right shoulder-side cooling ports 86 are aligned in a row along the longitudinal direction of the contact surface 44a of the right shoulder belt 44. When the right shoulder belt 44 is worn on the user's right shoulder, the eight first right shoulder-side cooling ports 86 are located near and facing the user's right shoulder.

[0058] The three second right shoulder-side cooling ports 88 shown in Fig. 5 are arranged near the boundary between the contact surface 44a (see Fig. 4) and the non-contact surface 44b of the right shoulder belt 44. The three second right shoulder-side cooling ports 88 are aligned in a row along the longitudinal direction of the right shoulder belt 44. When the right shoulder belt 44 is worn on the right shoulder of the user, the three second right shoulder-side cooling ports 88 are located near the user's right shoulder and face the user's face or neck.

[0059] As shown in FIG. 4, the left shoulder-side cooling port 84 is disposed on the left shoulder belt 46. The one or more left shoulder-side cooling ports 84 include one or more (eight in this embodiment) first left shoulder-side cooling ports 90 and one or more (three in this embodiment) second left shoulder-side cooling ports 92 (see FIG. 5). The eight first left shoulder-side cooling ports 90 are disposed on the contact surface 46a of the left shoulder belt 46. The eight first left shoulder-side cooling ports 90 are aligned in a row along the longitudinal direction of the contact surface 46a of the left shoulder belt 46. When the left shoulder belt 46 is worn on the user's left shoulder, the eight first left shoulder-side cooling ports 90 are located near and face the user's left shoulder.

[0060] The three second left shoulder-side cooling ports 92 shown in Fig. 5 are arranged near the boundary between the contact surface 46a (see Fig. 4) and the non-contact surface 46b of the left shoulder belt 46. The three second left shoulder-side cooling ports 92 are aligned in a row along the longitudinal direction of the left shoulder belt 46. When the left shoulder belt 46 is worn on the left shoulder of the user, the three second left shoulder-side cooling ports 92 are near the user's left shoulder and face the user's face or neck.

[0061] 4, the one or more back-side cooling ports 78 include one or more (three in this embodiment) right-side back cooling ports 96 and one or more (three in this embodiment) left-side back cooling ports 98. The three right-side back cooling ports 96 are arranged on the contact surface 48a of the right-side back pad 48. The three right-side back cooling ports 96 are aligned in a row along the longitudinal direction of the contact surface 48a of the right-side back pad 48. When the right-side back pad 48 is in contact with the user's back, the three right-side back cooling ports 96 are near the user's back and face the user's back.

[0062] The three left back-side cooling ports 98 are disposed on the contact surface 50a of the left back pad 50. The three left back-side cooling ports 98 are aligned in a row along the longitudinal direction of the contact surface 50a of the left back pad 50. When the left back pad 50 is in contact with the user's back, the three left back-side cooling ports 98 are near the user's back and face the user's back.

[0063] The ten lumbar cooling ports 80 are arranged on the contact surface 42a of the waist belt 42. The ten lumbar cooling ports 80 are aligned in a row along the longitudinal direction of the contact surface 42a of the waist belt 42. When the waist belt 42 is worn around the waist of the user, the ten lumbar cooling ports 80 are located near the user's waist and face the user's waist.

[0064] 5, the cooling structure 56 further includes an air flow path 100. Cooling air flows through the air flow path 100 by the operation of the four cooling fans 58. The air flow path 100 includes one or more shoulder-side air flow paths 102, one or more back-side air flow paths 104, and one or more (one in this embodiment) lumbar-side cooling flow paths 106.

[0065] The one or more shoulder-side air channels 102 include one or more (one in this embodiment) right shoulder-side air channels 110 and one or more (one in this embodiment) left shoulder-side air channels 112. The right shoulder-side air channel 110 is defined inside the right shoulder belt 44. The right shoulder-side air channel 110 is in communication with the outside of the right shoulder belt 44 via a plurality of right shoulder-side cooling ports 82. The left shoulder-side air channel 112 is defined inside the left shoulder belt 46. The left shoulder-side air channel 112 is in communication with the outside of the left shoulder belt 46 via a plurality of left shoulder-side cooling ports 84.

[0066] The one or more back-side air channels 104 include one or more (one in this embodiment) right-side air channels 114 and one or more (one in this embodiment) left-side air channels 116. The right-side air channel 114 is defined inside the right-side back pad 48. The right-side air channel 114 is in communication with the outside of the right-side back pad 48 via three right-side back cooling ports 96. The right-side air channel 114 is also in communication with the right-shoulder air channel 110. The left-side back air channel 116 is defined inside the left-side back pad 50. The left-side back air channel 116 is in communication with the outside of the left-side back pad 50 via three left-side back cooling ports 98. The left-side air channel 116 is also in communication with the left-shoulder air channel 112.

[0067] The lumbar cooling flow path 106 is defined inside the waist belt 42. The lumbar cooling flow path 106 communicates with the outside of the waist belt 42 via ten lumbar cooling ports 80.

[0068] Next, a method for cooling the user's body by operating the four cooling fans 58 will be described. First, a case in which cooling air flows out of multiple cooling ports 60 by operating the four cooling fans 58 will be described. When the user operates the selector switch 64 (see FIG. 3) of the external power supply 62 while wearing the backpack-type unit 2 (see FIG. 1) on their back, the four cooling fans 58 start operating. As shown in FIG. 5, when the right shoulder cooling fan 70a starts operating, cooling air flows from outside the right shoulder belt 44 into the right shoulder air flow path 110 via the right shoulder cooling fan 70a. While flowing through the right shoulder air flow path 110, some of the inflowing cooling air flows out of the right shoulder belt 44 through the eight first right shoulder cooling ports 86 and also flows out of the right shoulder belt 44 through the three second right shoulder cooling ports 88. The cooled air flowing out of the first right shoulder-side cooling port 86 flows along the surface of the user's right shoulder, cooling it. The cooled air flowing out of the second right shoulder-side cooling port 88 flows along the surface of the user's face or neck, cooling it. The remainder of the cooled air flowing through the right shoulder-side airflow path 110 flows from the right shoulder-side airflow path 110 into the right back-side airflow path 114 and exits the right back pad 48 through the three right back-side cooling ports 96. The exiting cooled air flows along the surface of the user's back, cooling the user's back. Because the right shoulder belt 44 and the right back pad 48 are made of a breathable fabric material, moisture is absorbed from the vicinity of the right shoulder belt 44 and the right back pad 48 while the cooled air flows through the right shoulder-side airflow path 110 and the right back-side airflow path 114, reducing stuffiness around the user's right shoulder and back. Furthermore, when the cooled air flows through the right shoulder air flow path 110 and the right back air flow path 114, the right shoulder belt 44 and the right back pad 48 are cooled, making the user less likely to feel hot.

[0069] Furthermore, when the left shoulder-side cooling fan 70b operates, cooled air flows from the outside of the left shoulder belt 46 into the left shoulder-side air flow path 112 via the left shoulder-side cooling fan 70b. While flowing through the left shoulder-side air flow path 112, a portion of the inflowing cooled air flows out of the left shoulder belt 46 through the eight first left shoulder-side cooling ports 90 and also flows out of the left shoulder belt 46 through the three second left shoulder-side cooling ports 92. The cooled air flowing out of the first left shoulder-side cooling ports 90 flows along the surface of the user's left shoulder, cooling the user's left shoulder. The cooled air flowing out of the second left shoulder-side cooling ports 92 flows along the surface of the user's face or neck, cooling the user's face or neck. The remainder of the cooled air flowing through the left shoulder-side air flow path 112 flows from the left shoulder-side air flow path 112 into the left back-side air flow path 116 and flows out of the left back pad 50 through the three left back-side cooling ports 98. The outflowing cooled air flows along the surface of the user's back, cooling the user's back. Because the left shoulder belt 46 and the left back pad 50 are made of a breathable fabric material, moisture is absorbed near the left shoulder belt 46 and the left back pad 50 while the cooled air flows through the left shoulder-side air flow path 112 and the left back-side air flow path 116, reducing stuffiness on the user's left shoulder and back. In addition, when the cooled air flows through the left shoulder-side air flow path 112 and the left back-side air flow path 116, the left shoulder belt 46 and the left back pad 50 are cooled, making the user less likely to feel hot.

[0070] Furthermore, when the right waist-side cooling fan 72a and the left waist-side cooling fan 72b are operated, cooled air flows from outside the waist belt 42 into the waist-side cooling channel 106 via the right waist-side cooling fan 72a and the left waist-side cooling fan 72b. The inflowing cooled air flows through the waist-side cooling channel 106 and exits the waist belt 42 through the ten waist-side cooling ports 80. The exiting air flows along the surface of the user's waist, cooling the user's waist. Because the waist belt 42 is made of a breathable fabric material, moisture is absorbed near the waist belt 42 while the cooled air flows through the waist-side cooling channel 106, reducing stuffiness around the user's waist. Furthermore, when the cooled air flows through the waist-side cooling channel 106, the waist belt 42 is cooled, making the user less likely to feel hot.

[0071] Next, a case where cooled air flows in from multiple cooling ports 60 due to the operation of four cooling fans 58 will be described. As shown in FIG. 5 , when right shoulder-side cooling fan 70a is operated, cooled air flows from near the user's right shoulder into right shoulder-side air flow path 110 via eight first right shoulder-side cooling ports 86. At this time, the cooled air flows along the surface of the user's right shoulder to cool the user's right shoulder. Furthermore, cooled air flows from near the user's face or neck into right shoulder-side air flow path 110 via three second right shoulder-side cooling ports 88. At this time, the cooled air flows along the surface of the user's face or neck to cool the user's face or neck. Furthermore, cooled air flows from near the user's back into right back-side air flow path 114 via three right back-side cooling ports 96 and flows to right shoulder-side air flow path 110. At this time, the cooled air flows along the surface of the user's back to cool the user's back. The cooling air flows through the right shoulder side air flow path 110, is then blown out by the right shoulder side cooling fan 70a, and flows out to the outside of the right shoulder belt 44.

[0072] When the left shoulder-side cooling fan 70b operates, cooled air flows from near the user's left shoulder into the left shoulder-side air flow path 112 via the eight first left shoulder-side cooling ports 90. At this time, the cooled air flows along the surface of the user's left shoulder, cooling the user's left shoulder. Furthermore, the cooled air flows from near the user's face or neck into the left shoulder-side air flow path 112 via the three second left shoulder-side cooling ports 92. At this time, the cooled air flows along the surface of the user's face or neck, cooling the user's face or neck. Furthermore, the cooled air flows from near the user's back into the left back-side air flow path 116 via the three left back-side cooling ports 98 and flows to the left shoulder-side air flow path 112. At this time, the cooled air flows along the surface of the user's back, cooling the user's back. After flowing through the left shoulder-side air flow path 112, the cooled air is blown out by the left shoulder-side cooling fan 70b and flows out of the left shoulder belt 46.

[0073] Furthermore, when right waist-side cooling fan 72a and left waist-side cooling fan 72b are operated, cooled air flows from the vicinity of the user's waist into waist-side cooling channel 106 via ten waist-side cooling ports 80. At this time, the cooled air flows along the surface of the user's waist, cooling the user's waist. After flowing through waist-side cooling channel 106, the cooled air is sent out by right waist-side cooling fan 72a and left waist-side cooling fan 72b and flows out of waist belt 42.

[0074] (effect) In this embodiment, the backpack unit 2 includes a main body 4 and a base member 6 having a cooling port 60. The base member 6 includes a back panel 14 attached to the main body 4 and a harness 16 attached to the back panel 14 and worn by a user. The harness 16 includes at least one shoulder strap 38 worn on the user's shoulders and a cooling fan 58. The cooling fan 58 directs cooling air in and out through the cooling port 60 in the base member 6.

[0075] According to the above configuration, the user's body can be cooled by operating the cooling fan 58 while the user is wearing the backpack-type unit 2. This makes it possible to prevent the user from feeling too hot when wearing the backpack-type unit 2.

[0076] Furthermore, when the user wears the harness 16, the cooling port 60 is located near the user.

[0077] According to the above configuration, the cooling air flows near the user's body when it flows in or out through the cooling port 60. This makes it possible to further reduce the user's feeling of heat when carrying the backpack-type unit 2 on their back.

[0078] Furthermore, when the user wears the harness 16, the cooling port 60 faces the user.

[0079] According to the above configuration, when cooling air flows in or out through the cooling port 60, the cooling air flows along the surface of the user's body. This makes it possible to further reduce the user's feeling of heat when carrying the backpack-type unit 2 on their back.

[0080] The harness 16 also includes a back pad 40 that contacts the user's back when the user wears the harness 16. When the user wears the harness 16, the cooling ports 60 face the portion of the user's back that is in contact with the back pad 40.

[0081] When the harness 16 includes the back pad 40, the back pad 40 comes into contact with the user's back, which tends to trap heat in the user's back. With the above configuration, when cooling air flows in or out through the cooling port 60, the cooling air flows along the surface of the portion of the user's back that comes into contact with the back pad 40. This further reduces the user's feeling of heat when wearing the backpack-type unit 2.

[0082] Additionally, shoulder-side cooling ports 76 are located in the shoulder belt 38 .

[0083] When the user carries the backpack-type unit 2 on their back, the shoulder belts 38 come into contact with the user's shoulders, which can easily trap heat in the user's shoulders. With the above configuration, when cooling air flows in or out through the shoulder-side cooling ports 76, the cooling air flows along the surface of the user's shoulders. This can further reduce the user's feeling of heat when carrying the backpack-type unit 2.

[0084] The harness 16 further includes a waist belt 42 that is attached to the waist of the user. The waist cooling port 80 is disposed in the waist belt 42.

[0085] When the harness 16 is equipped with the waist belt 42, the waist belt 42 comes into contact with the user's waist, which tends to trap heat in the user's waist. With the above configuration, when cooling air flows in or out through the waist-side cooling port 80, the cooling air flows along the surface of the user's waist. This further reduces the user's feeling of heat when carrying the backpack-type unit 2 on their back.

[0086] The waist cooling fan 72 is disposed on the waist belt 42.

[0087] According to the above configuration, the lower back cooling fan 72 can be disposed without providing a separate member on the base member 6 for disposing the lower back cooling fan 72 thereon.

[0088] The shoulder-side cooling fan 70 is disposed on the shoulder belt 38 .

[0089] According to the above configuration, shoulder side cooling fan 70 can be disposed without providing a separate member on base member 6 for disposing shoulder side cooling fan 70 thereon.

[0090] The backpack unit 2 further includes an external power supply 62 that supplies power to the cooling fan 58 .

[0091] According to the above configuration, even when power is not supplied from the main body 4 to the cooling fan 58, the cooling fan 58 can be operated.

[0092] The base member 6 also includes a mounting member 52 to which an external power supply 62 can be attached.

[0093] According to the above configuration, the user can carry the external power supply 62 by carrying the backpack-type unit 2 on his / her back.

[0094] The cooling fan 58 is configured so that the air volume can be adjusted.

[0095] According to the above configuration, the air volume of the cooling fan 58 can be adjusted according to the degree of heat felt by the user.

[0096] The main body 4 can be connected to an electric work machine having a motor, and can supply power to the motor of the electric work machine.

[0097] According to the above configuration, when a user carries the backpack unit 2 that supplies power to an electric operating machine on his / her back, the user can be prevented from feeling hot.

[0098] The harness 16 also includes an air flow path 100 that communicates with the cooling port 60. When the cooling fan 58 operates, cooling air flows through the air flow path 100.

[0099] According to the above configuration, the cooling air flows through the air flow path 100, thereby cooling the harness 16. This makes it possible to further reduce the user's feeling of heat when carrying the backpack-type unit 2 on their back.

[0100] (Second Example) A second embodiment will be described with reference to Figures 6 and 7. In the second embodiment, only the differences from the first embodiment will be described, and the same parts as in the first embodiment will be denoted by the same reference numerals and will not be described again. In the second embodiment, the arrangement of the three right back-side cooling ports 96, the arrangement of the three left back-side cooling ports 98, and the arrangement of four of the multiple lumbar cooling ports 80 are different from those in the first embodiment. Hereinafter, the four of the multiple lumbar cooling ports 80 will be referred to as central lumbar cooling ports 180.

[0101] 6 are arranged near the boundary between the contact surface 48a and the non-contact surface of the right back pad 48. The non-contact surface of the right back pad 48 is the surface that does not come into contact with the user's back when the right back pad 48 is in contact with the user's back, and is the surface opposite the contact surface 48a of the right back pad 48. The three right back cooling ports 96 are arranged at the left end of the right back pad 48.

[0102] The three left back-side cooling ports 98 are arranged near the boundary between the contact surface 50a and the non-contact surface of the left back pad 50. The non-contact surface of the left back pad 50 is the surface that does not come into contact with the user's back when the left back pad 50 is in contact with the user's back, and is the surface opposite the contact surface 50a of the left back pad 50. The three left back-side cooling ports 98 are arranged at the right end of the left back pad 50. Each of the three left back-side cooling ports 98 faces each of the three right back-side cooling ports 96.

[0103] 7 are arranged near the boundary between the contact surface 42a (see FIG. 6) and the non-contact surface 42b of the waist belt 42. The four central waist-side cooling ports 180 are arranged at the upper end of the waist belt 42.

[0104] As shown in Fig. 6, a non-contact space 190 is formed between the right back pad 48 and the left back pad 50 (a gap in the left-right direction) and between the back pad 40 and the waist belt 42 (a gap in the up-down direction). When the harness 16 is worn by a user, the non-contact space 190 is located between the user's back and the backboard 14. Furthermore, when the harness 16 is worn by a user, the back pad 40 and the waist belt 42 are not located in the non-contact space 190. When the harness 16 is worn by a user, the three right back-side cooling ports 96, the three left back-side cooling ports 98, and the four central waist-side cooling ports 180 all face the non-contact space 190.

[0105] Next, a method for cooling the user's body by operating the four cooling fans 58 will be described. Below, only the flow of cooling air through the three right back-side cooling ports 96, the three left back-side cooling ports 98, and the four central waist-side cooling ports 180 will be described. First, a case where cooling air flows out from multiple cooling ports 60 due to the operation of the four cooling fans 58 will be described. In FIG. 6, the direction of some of the cooling air flow is indicated by arrows. Due to the operation of the right shoulder-side cooling fan 70a, cooling air flows through the right back-side air flow path 114 (see FIG. 7) in the right back pad 48, and then the cooling air flows out from the three right back-side cooling ports 96 into the non-contact space 190. Furthermore, due to the operation of the left shoulder-side cooling fan 70b, cooling air flows through the left back-side air flow path 116 (see FIG. 7) in the left back pad 50, and then flows out from the three left back-side cooling ports 98 into the non-contact space 190. Furthermore, after cooling air flows through waist cooling flow passages 106 (see FIG. 7) in waist belt 42 due to the operation of right waist-side cooling fan 72a and left waist-side cooling fan 72b, the cooling air flows out from four central waist-side cooling ports 180 into non-contact space 190. While flowing through non-contact space 190, the flowing-out cooling air flows along the surface of the user's back and cools the user's back. Thereafter, the cooling air flows in the direction of the arrow in FIG. 6 and flows out into the space outside non-contact space 190.

[0106] Next, a case where cooled air flows in from multiple cooling ports 60 due to the operation of four cooling fans 58 will be described. When four cooling fans 58 are operated, cooled air flows in the direction opposite to the arrows in FIG. 6 from a space outside non-contact space 190 into non-contact space 190. While flowing through non-contact space 190, the inflowing cooled air flows along the surface of the user's back, cooling the user's back. The cooled air then flows into right back-side air flow path 114 (see FIG. 7) via three right back-side cooling ports 96. The cooled air also flows into left back-side air flow path 116 (see FIG. 7) via three left back-side cooling ports 98. The cooled air then flows into waist-side cooling flow path 106 (see FIG. 7) via four central waist-side cooling ports 180.

[0107] (effect) In this embodiment, the harness 16 further includes a back pad 40 that comes into contact with the user's back when the user wears the harness 16. When the user wears the harness 16, a non-contact space 190 is formed between the user's back and the backboard 14, where the back pad 40 is not disposed. The cooling port 60 faces the non-contact space 190 when the user wears the harness 16.

[0108] When the harness 16 is equipped with the back pad 40, the back pad 40 comes into contact with the user's back, which tends to trap heat in the user's back. With the above configuration, when cooling air flows in or out through the cooling port 60, the cooling air flows along the surface of the user's back in the non-contact space 190. This makes it possible to further prevent the user from feeling overheated when carrying the backpack-type unit 2.

[0109] (Third Example) A third embodiment will be described with reference to Figures 8 and 9. In the third embodiment, only the differences from the second embodiment will be described, and the same reference numerals will be used to designate the same parts as in the second embodiment, and the description thereof will be omitted. In the third embodiment, the at least one cooling fan 58 further includes a back panel side cooling fan 258.

[0110] As shown in FIG. 8, the back panel-side cooling fan 258 is disposed below the first back panel 18. The back panel-side cooling fan 258 is disposed so as to penetrate the first back panel 18 in the thickness direction (front-to-back direction). The back panel-side cooling fan 258 is disposed between the right attachment portion 26 and the left attachment portion 28 of the first back panel 18. The back panel-side cooling fan 258 operates using power supplied from an external power supply 62 (see FIG. 9) via a cable (not shown). As shown in FIG. 9, when the base member 6 is viewed from the front, the back panel-side cooling fan 258 is hidden by the waist belt 42 and cannot be seen.

[0111] Next, a method for cooling the user's body by operating the back panel-side cooling fan 258 will be described. First, a method for cooling the user's body by cooling air flowing in the direction of the arrow in FIG. 9 will be described. When the back panel-side cooling fan 258 is operated, external cooling air flows from the gap between the main body 4 (see FIG. 1) and the first back panel 18 to the back panel-side cooling fan 258, and is then sent by the back panel-side cooling fan 258 into the space between the waist belt 42 and the first back panel 18. Then, a portion of the cooling air flows in the direction of the arrow in FIG. 9 from the space between the waist belt 42 and the first back panel 18 into the non-contact space 190. While flowing through the non-contact space 190, the inflowing cooling air flows along the surface of the user's back and cools the user's back. Then, the cooling air flows out into the space outside the non-contact space 190.

[0112] Next, a method for cooling the user's body using cooling air flowing in the direction opposite to the arrow in FIG. 9 will be described. When the back panel-side cooling fan 258 is operated, cooling air flows in the direction opposite to the arrow in FIG. 9 from a space outside the non-contact space 190 into the non-contact space 190. While flowing through the non-contact space 190, the inflowing air flows along the surface of the user's back, cooling the user's back. The cooling air then flows from the non-contact space 190 into the space between the waist belt 42 and the first back panel 18. After flowing through the space between the waist belt 42 and the first back panel 18, the inflowing cooling air is sent by the back panel-side cooling fan 258 into the gap between the main body 4 (see FIG. 1) and the first back panel 18. The cooling air then flows out from the gap between the main body 4 and the first back panel 18 to the outside.

[0113] (effect) In this embodiment, the back panel side cooling fan 258 is disposed on the back panel 14 .

[0114] According to the above configuration, the back panel side cooling fan 258 can be disposed without providing a separate member on the base member 6 for disposing the back panel side cooling fan 258 thereon.

[0115] (Correspondence) The space between the waist belt 42 and the first back panel 18 is an example of a "cooling port."

[0116] (Fourth Example) A fourth embodiment will be described with reference to Fig. 10. In the fourth embodiment, only the differences from the first embodiment will be described, and the same parts as in the first embodiment will be denoted by the same reference numerals and will not be described again. In the fourth embodiment, the position at which the mounting member 52 is attached differs from that in the first embodiment.

[0117] The attachment member 52 is detachably attached to the right shoulder belt 44. In this case, the user operates the selector switch 64 of the external power supply 62 and the airflow adjustment switch 66 with, for example, the left hand. In a modified example, the attachment member 52 may be detachably attached to the left shoulder belt 46.

[0118] (Fifth Example) A fifth embodiment will be described with reference to FIG. 11. In the fifth embodiment, only the differences from the first embodiment will be described, and the same components as those in the first embodiment will be denoted by the same reference numerals and will not be described again. In the fifth embodiment, the backpack unit 2 does not include the mounting member 52 and the external power supply 62. The four cooling fans 58 are operated by power supplied from the main body 4.

[0119] The main body 4 includes a main body casing 360, a battery 362, a selector switch 364, and an airflow adjustment switch 366. The battery 362 is housed inside the main body casing 360. The battery 362 is, for example, a chargeable and dischargeable secondary battery. Power from the battery 362 is supplied to the four cooling fans 58 (see FIG. 3) via a cable (not shown). Power from the battery 362 is also supplied to an electric work machine (not shown) having a motor via a connection cord 8.

[0120] The changeover switch 364 and the air volume adjustment switch 366 are disposed on the outer surface of the main body casing 360. The changeover switch 364 switches the cooling fan 58 between an on state and an off state. The air volume adjustment switch 366 adjusts the air volume of the cooling fan 58.

[0121] (effect) In this embodiment, the main body 4 is electrically connected to the cooling fan 58 and is capable of supplying power to the cooling fan 58 .

[0122] According to the above configuration, even if the backpack-type unit 2 does not have an external power source that supplies power to the cooling fan 58, the cooling fan 58 can be operated.

[0123] (Variation) In one embodiment, the body 4 may be integrally formed with the back plate 14 .

[0124] In one embodiment, the main body 4 may be a working machine, such as a dust collector, a blower, or a mist blower.

[0125] In one embodiment, the right shoulder belt 44 and the right back pad 48 may be separate pieces, and the left shoulder belt 46 and the left back pad 50 may be separate pieces.

[0126] In one embodiment, the right shoulder belt 44 and the left shoulder belt 46 may be integrally formed, and the right back pad 48 and the left back pad 50 may be integrally formed.

[0127] In one embodiment, the air flow path 100 may be provided with a cushioning material, such as sponge or cotton, that allows air to flow therethrough.

[0128] In one embodiment, the waist belt 42, right shoulder belt 44, left shoulder belt 46, right back pad 48, and left back pad 50 may be integrally formed.

[0129] In one embodiment, the cooling structure 56 may include only the shoulder-side cooling fans 70, or may include only the lumbar-side cooling fans 72. Alternatively, the cooling structure 56 may include only one shoulder-side cooling fan 70 and one lumbar-side cooling fan 72.

[0130] In one embodiment, the cooling fan 58 may be located at the cooling port 60 .

[0131] In one embodiment, the backpack unit 2 may not include the attachment member 52. In this case, the external power source 62 may be removably attached to the waist belt 42 via a buckle, or may be removably attached to the shoulder belt 38 via a buckle.

[0132] In one embodiment, the air volume adjustment switch 66 may be configured to have a rhythm operation mode that automatically switches between a strong wind mode and a weak wind mode.

[0133] In one embodiment, the plurality of cooling ports 60 may include only one or two of one or more shoulder cooling ports 76, one or more back cooling ports 78, and one or more lumbar cooling ports 80.

[0134] In one embodiment, the main body 4 may provide power to the cooling fan 58 via an adapter such as a cable.

[0135] In one embodiment, the changeover switch 64 and the airflow adjustment switch 66 may be attached to the cooling fan 58 . [Explanation of symbols]

[0136] 2: Backpack unit 4: Main unit 6: Base material 14: Back plate 16: Harness 18: 1st back plate 20:Second back plate 38: Shoulder belt 40: Back pad 42: Waist belt 44: Right shoulder belt 46: Left shoulder belt 48: Right back pad 50: Left back pad 52: Mounting material 58: Cooling fan 60: Cooling port 62: External power supply 64: Switch 66: Air volume adjustment switch 70: Shoulder cooling fan 72: Lower back cooling fan 76: Shoulder cooling port 78: Back cooling port 80: Waist cooling port 82: Right shoulder cooling port 84: Left shoulder cooling port 96: Right rear cooling port 98: Left rear cooling port 100: Air flow path 102: Shoulder side air flow path 104: Back air flow path 106: Cooling channel on the lower back 110: Right shoulder air flow path 112: Left shoulder air flow path 114: Right rear air flow path 116: Left rear air flow path 180: Central waist cooling port 190: Non-contact space 258: Back panel cooling fan 362: Battery

Claims

1. The main body and a base member having a cooling port; The base member is a back plate attached to the main body; a harness attached to the backboard and worn by a user; The harness is at least one shoulder belt attached to the shoulder of the user; It is equipped with a cooling fan, the cooling fan directs cooling air through the cooling port in the base member; The harness further includes a back pad that contacts the user's back when the user wears the harness; When the user wears the harness, a non-contact space is formed between the back of the user and the backboard, in which the back pad is not disposed; A backpack-type unit, wherein the cooling port faces the non-contact space when the user wears the harness.

2. The backpack unit of claim 1 , wherein the cooling port is positioned adjacent to the user when the user is wearing the harness.

3. 3. The backpack unit of claim 1 or 2, wherein the cooling port faces the user when the user is wearing the harness.

4. A backpack unit as described in any one of claims 1 to 3, wherein when the user wears the harness, the cooling port faces the part of the user's back that is in contact with the back pad.

5. 5. The backpack unit of claim 1, wherein the cooling port is located in the shoulder strap.

6. The harness further includes a waist belt attached to the waist of the user, 5. The backpack unit of claim 1, wherein the cooling port is located in the waist belt.

7. 7. The backpack unit of claim 6, wherein the cooling fan is located on the waist belt.

8. 5. The backpack unit according to claim 1, wherein the cooling fan is disposed on the shoulder belt.

9. The backpack unit according to claim 1 , wherein the cooling fan is disposed on the back panel.

10. 10. The backpack unit of claim 1, further comprising an external power source for powering the cooling fan.

11. The backpack unit of claim 10, wherein the base member includes a mounting member to which the external power source can be attached.

12. 10. The backpack unit of claim 1, wherein the main body is electrically connected to the cooling fan and is capable of supplying power to the cooling fan.

13. 13. The backpack unit according to claim 1, wherein the cooling fan is configured so that the airflow rate is adjustable.

14. The main body is connectable to an electric working machine having a motor, The backpack unit according to claim 1 , wherein the main body is capable of supplying power to the motor of the electric work machine.

15. the harness includes an air flow path communicating with the cooling port; 15. The backpack unit of claim 1, wherein cooling air flows through the air flow path when the cooling fan is operating.

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