Backpack power supply system

Abstract

The present invention relates to a backpack power supply system, comprising a safety switch member for controlling the on-off state of a control switch. The safety switch member is provided with a rotating shaft extending in the axial direction, and a first contact portion and a second contact portion which are arranged at two ends of the rotating shaft in a longitudinal direction perpendicular to the axial direction; the first contact portion at least partially protrudes out of a housing and is used for abutting against a battery pack; and the second contact portion is arranged close to a push rod. When the battery pack is inserted into a main body portion, the battery pack pushes the first contact portion to drive the second contact portion to rotate around the rotating shaft to be tangent to the bottom surface of the push rod, and at this time, the push rod of the control switch pushes a contact point to switch on the control switch. Due to the provision of the safety switch, sparking of an electrode holder of the battery pack caused by switching on of the circuit when the battery pack is just in contact with the whole machine can be effectively avoided, thereby improving the safety coefficient of operations, and prolonging the service life of the backpack power supply system.

Description

Backpack power supply system Technical Field

[0001] The present invention relates to the technical field of backpack power supply systems, and in particular to a safe and stable backpack power supply system. Background Art

[0002] The operating time of power tools is limited by the battery capacity. To increase the continuous operating time of power tools, the battery capacity of the battery pack connected to the power tool needs to be increased, which leads to a continuous increase in the weight of the battery pack. For handheld power tools, the user's hand needs to bear more weight, which deteriorates the operating experience.

[0003] A backpack power supply is a device used to power power tools. It is carried on the user's back to reduce the weight on the user's hands. Most backpack power supplies currently on the market lack safety protection for the control switch. This means the circuit is activated as soon as the battery pack contacts the device. This can cause the battery pack's electrode holder to ignite, shortening the life of the battery pack's motor holder and increasing the risk of electric shock from touching the terminals.

[0004] Some backpack power supply devices on the market have safety protection settings for the control switch, but due to unreasonable structural settings, the control switch is unstable, which causes the control switch to contact and close prematurely when the battery pack has not yet been inserted into the main body, which can easily induce the motor seat of the battery pack to ignite, shortening the service life of the motor seat of the battery pack.

[0005] In view of this, it is indeed necessary to provide an improved backpack power supply system to overcome the defects of the prior art. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the object of the present invention is to provide a backpack power supply system with a safety switch component, which can effectively reduce the risk of fire caused by the motor seat of the battery pack.

[0007] The technical solution adopted by the present invention to solve the existing technical problems is: a backpack power supply system, including a battery pack, a main body carrying the battery pack and a wearable device connected to the main body, the main body including a housing, a control switch accommodated in the housing and a safety switch component that controls the on / off state of the control switch, the control switch is provided with a flat push rod and a contact protruding from the surface of the control switch, and the safety switch component can push the push rod to press the contact; it is characterized in that: the safety switch component is provided with a rotating shaft extending along the axial direction, a first contact portion and a second contact portion arranged at both ends of the rotating shaft along a longitudinal direction perpendicular to the axial direction, the first contact portion at least partially protruding from the housing and used to abut the battery pack, and the second contact portion is arranged close to the push rod; when the battery pack is plugged into the main body, the battery pack pushes the first contact portion to drive the second contact portion to rotate around the rotating axis until it is tangent to the bottom surface of the push rod, at which time the push rod of the control switch pushes the contact to turn on the control switch.

[0008] A further improved solution is: the safety switch component is provided with a rounded surface located on the top of the second contact portion, and the rounded surface contacts the bottom surface of the push rod and pushes the push rod to swing.

[0009] A further improved solution is: the housing includes a first shell, a second shell and a third shell that are interlocked, the first shell, the second shell and the third shell are jointly surrounded to form an accommodating cavity, and the safety switch component is at least partially accommodated in the accommodating cavity.

[0010] A further improved solution is: the safety switch component includes an elastic component located in the accommodating cavity, one end of the elastic component abuts against the bottom wall of the first contact portion and the other end abuts against the inner wall of the third shell.

[0011] A further improved solution is: the safety switch component includes at least two elastic components, and the two elastic components respectively support the two axial ends of the first contact portion.

[0012] A further improvement is that the safety switch component is provided with a limiting portion protruding outward along the longitudinal direction of the first contact portion. When the battery pack is not installed to the main body, the first contact portion is lifted by the elastic component and the limiting portion abuts against the inner wall of the second shell.

[0013] A further improved solution is: the main body includes a fixing member supported on the casing, and the control switch is fixed on the fixing member.

[0014] A further improved solution is: the fixing member is provided with two downwardly protruding and parallel supporting feet and a mounting gap formed between the two supporting feet, the push rod of the control switch at least partially extends into the mounting gap, and the second contact portion swings around the rotation axis in the mounting gap to push the push rod.

[0015] A further improved solution is: the fixing member is provided with a clamping groove protruding outward from the surface of the supporting leg, and the rotating shaft is rotatably supported on the clamping groove.

[0016] A further improved solution is that the distance between the two slots is smaller than the length of the rotating shaft, so as to support the axial ends of the rotating shaft.

[0017] A backpack power supply system includes a battery pack, a main body that carries the battery pack, and a wearable device connected to the main body, the main body includes a casing, a control switch housed in the casing, and a safety switch component that controls the on / off state of the control switch, the control switch is provided with a flat push rod and a contact protruding from the surface of the control switch, the safety switch component can push the push rod to press onto the contact; the casing includes a first shell, a second shell, and a third shell that are interlocked, the first shell, the second shell, and the third shell together enclose a receiving cavity, the safety switch component is at least partially received in the receiving cavity, wherein the second shell is provided with an opening running through the bottom, the safety switch component can pass through the casing through the opening portion.

[0018] A further improvement is as follows: the safety switch component is provided with a rotating shaft extending along the axial direction, a first contact portion and a second contact portion arranged at both ends of the rotating shaft along a longitudinal direction perpendicular to the axial direction, and the safety switch component includes an elastic component located in the accommodating cavity, one end of the elastic component abuts against the bottom wall of the first contact portion and the other end abuts against the inner wall of the third shell.

[0019] A further improved solution is: the safety switch component includes at least two elastic components, and the two elastic components respectively support the two axial ends of the first contact portion.

[0020] A further improvement is that the safety switch component is provided with a limiting portion protruding outward along the longitudinal direction of the first contact portion. When the battery pack is not installed to the main body, the first contact portion is lifted by the elastic component and the limiting portion abuts against the inner wall of the second shell.

[0021] A further improved solution is that the safety switch component can be retracted from the opening into the housing under the pressure of the battery pack.

[0022] A further improved solution is: when the battery pack is plugged into the main body, the battery pack pushes the first contact part to drive the second contact part to rotate around the rotation axis until it is tangent to the bottom surface of the push rod. At this time, the push rod of the control switch pushes the contact to turn on the control switch.

[0023] A further improved solution is that the first contact portion and the second contact portion can swing around the rotation axis.

[0024] A further improved solution is: the main body includes a fixing member supported on the casing, and the control switch is fixed on the fixing member.

[0025] A further improved solution is: the fixing member is fixed to the second shell by screws.

[0026] A backpack power supply system includes a battery pack, a main body that carries the battery pack, and a wearable device connected to the main body. It also includes a simulated battery pack. The main body is connected to the simulated battery pack via a cable. The cable is provided with an electrical plug at one end away from the main body. The simulated battery pack is provided with an electrical receiving part corresponding to the electrical plug, and the electrical plug and the electrical receiving part are provided with an anti-foolproof structure.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the safety switch component is provided with an axially extending rotating shaft, a first contact portion and a second contact portion arranged at both ends of the rotating shaft in a longitudinal direction perpendicular to the axial direction, the first contact portion at least partially protruding from the housing and used to abut the battery pack, and the second contact portion is arranged near the push rod; when the battery pack is plugged into the main body, the battery pack pushes against the first contact portion to drive the second contact portion to rotate around the rotating shaft until it is tangent to the bottom surface of the push rod, at which point the push rod of the control switch pushes the contact to turn on the control switch. The provision of the safety switch can effectively prevent the battery pack electrode holder from igniting due to the circuit being connected as soon as the battery pack contacts the entire device, thereby improving the safety factor of operation and increasing the service life of the backpack power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0029] FIG1 is a schematic structural diagram of a backpack power supply system according to a preferred embodiment of the present invention;

[0030] FIG2 is a schematic diagram of an anatomical view of the backpack power supply system shown in FIG1 when the battery pack is not fully plugged in;

[0031] FIG3 is a schematic diagram of an anatomical view of the backpack power supply system shown in FIG1 when the battery pack is fully plugged in;

[0032] FIG4 is a partially disassembled schematic diagram of the backpack power supply system shown in FIG1 ;

[0033] FIG5 is a rear view of the backpack power supply system shown in FIG1 with the first and third shells removed from the main body;

[0034] FIG6 is a schematic structural diagram of a fixing member in the backpack power supply system shown in FIG1 ;

[0035] 7 is a schematic diagram of a portion of the structure of a safety switch component in the backpack power supply system shown in FIG1 ;

[0036] FIG8 is a schematic structural diagram of a wearable device in the backpack power supply system shown in FIG1 ;

[0037] FIG9 is a schematic structural diagram of the wearable device shown in FIG8 from another angle;

[0038] FIG10 is a schematic diagram of the structure of a simulated battery pack and a cable portion in the backpack power supply system shown in FIG1 .

[0039] Meanings of the reference numerals in the figures: Backpack power supply system 100 Battery pack 1 Simulation battery pack 2 Power receiving part 21 Main body 3 Casing 31 First shell 311 Second shell 312 Third shell 313 Opening 314 Control switch 33 Push rod 331 Safety switch component 34 First contact portion 342 Rotating shaft 341 Elastic member 344 Second contact portion 343 Circumferential surface 346 Limiting portion 345 Switch accommodating cavity 351 Fixing member 35 Installation gap 353 Support foot 352 Pressing plate 355 Card slot 354 Battery pack receiving part 36 Wearable device 4 Pressure belt 441 Back strap 41 Adjustment block 413 Connecting belt 412 Sliding member 43 Back pad 42 Intermediate connecting member 44 Protrusion 431 Cable 5 Power plug 51 DETAILED DESCRIPTION

[0040] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. For example, terms such as "upper," "lower," "front," and "rear" indicating orientation or positional relationships are based solely on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the disclosure. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be construed as limiting the disclosure.

[0041] Please refer to Figures 1 to 10, which show a backpack power supply system 100 involved in a preferred embodiment of the present invention. The backpack power supply system 100 includes a battery pack 1, a main body 3 that carries the battery pack 1, and a wearable device 4 connected to the main body 3. Please refer to Figures 8 and 9, the wearable device 4 includes a shoulder strap 41 that at least partially supports the user's shoulders, and a back pad 42 that rests on the user's back and is connected to the shoulder strap 41. The shoulder strap 41 is fixed to the back pad 42, and the shoulder strap 41 and back pad 42 can be used as a whole; the wearable device 4 includes two shoulder straps 41, which are symmetrically arranged on the left and right sides of the back pad 42. The two shoulder straps 41 reasonably disperse the user's sense of weight, avoiding excessive pressure on one shoulder of the user, which may lead to health problems such as scoliosis.

[0042] The wearable device 4 also includes a sliding member 43 fixed on the other side of the back pad 42. The sliding member 43 is used to connect the wearable device 4 to the main body 3. The sliding member 43 is provided with a protrusion 431 symmetrically arranged along the installation direction of the battery pack 1. The main body 3 is correspondingly provided with a guide groove. The protrusion 431 slides in the guide groove to install the wearable device 4 on the main body 3.

[0043] The shoulder strap 41 also includes a pressure-bearing belt 411 connected to the upper portion of the back cushion 42, a connecting belt 412 connected to the lower portion of the back cushion 42, and an adjustment block 413 that connects the pressure-bearing belt 411 and the connecting belt 412. The adjustment block 413 can adjust the length of the shoulder strap 41. The pressure-bearing belt 411 is subjected to a large pressure. To reduce the pressure, the pressure-bearing belt 411 is wide along the left and right sides of the back cushion 42. The connecting belt 412 is relatively thin and can be extended or shortened by the adjustment block 413 to accommodate users of different heights and body shapes.

[0044] As shown in Figure 9, the wearable device 4 also includes an intermediate connector 44, which is used to connect the two straps 41 in front of the user's chest. The provision of the intermediate connector 44 helps further enhance the user's carrying experience. The intermediate connector 44 is arranged perpendicular to the direction in which the pressure-bearing belt 411 extends and is detachable into two sections. These two sections are respectively fixed to the two pressure-bearing belts 411 and are detachably connected via a pressing structure.

[0045] Please refer to Figures 1 to 4. The main body 3 includes a housing 31, a control switch 33 housed in the housing 31, and a safety switch component 34 for controlling the on / off state of the control switch 33. The control switch 33 is provided with a flat push rod 331 and a contact protruding from the surface of the control switch 33. The safety switch component 34 can push the push rod 331 to press onto the contact, thereby realizing the control of the on / off state of the circuit.

[0046] The housing 31 includes a first shell 311, a second shell 312 and a third shell 313 that are interlocked. The first shell 311, the second shell 312 and the third shell 313 are jointly surrounded to form an accommodating cavity. The safety switch component 34 is at least partially accommodated in the accommodating cavity. The second shell 312 is provided with an opening 314 passing through the bottom. The safety switch component 34 is movably mounted on the housing 31. When the battery pack 1 is not plugged into the main body 3, the safety switch component 34 partially extends through the opening 314 to the outside of the housing 31; when the battery pack 1 is plugged into the main body 3, the safety switch component 34 is pushed back into the housing 31 from the opening 314.

[0047] Please refer to Figures 1 to 7, the safety switch component 34 is provided with a rotating shaft 341 extending along the axial direction, a first contact portion 342 and a second contact portion 343 arranged at both ends of the rotating shaft 341 along a longitudinal direction perpendicular to the axial direction, and the first contact portion 342 and the second contact portion 343 can swing around the rotating shaft 341 within a certain angle range.

[0048] The first contact portion 342 at least partially protrudes from the housing 31 and is configured to contact the battery pack 1. The safety switch assembly 34 includes an elastic member 344 positioned within the accommodating cavity. One end of the elastic member 344 abuts the bottom wall of the first contact portion 342, and the other end abuts the inner wall of the third shell 313. When the battery pack 1 is not plugged into the main body 3, the first contact portion 342, under the action of the elastic member 344, partially extends through the opening 314 and out of the housing 31. The safety switch assembly 34 is provided with a stopper 345 protruding outward from the outer wall of the first contact portion 342. The stopper 345 abuts the inner wall of the housing 31, thereby limiting the displacement of the first contact portion 342. In this embodiment, the safety switch assembly 34 includes at least two elastic members 344, each of which supports the ends of the first contact portion 342, making the safety switch assembly 34 more stable.

[0049] The second contact portion 343 is positioned near the push rod 331 and can swing within a certain angle around the rotation axis 341. When the battery pack 1 is not plugged into the main body 3, the second contact portion 343 does not exert force on the push rod 331. When the battery pack 1 is plugged into the main body 3, the second contact portion 343 pushes the push rod 331 to rotate toward the contact point. When the second contact portion 343 rotates around the rotation axis 341 until it becomes tangential to the bottom surface of the push rod 331, the push rod 331 of the control switch 33 is pressed against the contact point. The second contact portion 343 has a rounded surface 346 at the top, which contacts the bottom surface of the push rod 331 and pushes the push rod 331 to swing.

[0050] The main body 3 includes a fixing member 35 supported on the casing 31. The fixing member 35 is provided with a switch accommodating cavity 351 for placing the control switch 33 and two downwardly protruding and parallel supporting feet 352. An installation gap 353 is formed between the two supporting feet 352. The push rod 331 of the control switch 33 at least partially extends into the installation gap. The second contact portion 343 swings around the rotation axis 341 in the installation gap 353 to push the push rod 331.

[0051] The fixing member 35 is provided with a slot 354 protruding outward from the surface of the supporting foot 352. The rotating shaft 341 is rotatably supported in the slot 354. The distance between the two slots 354 is less than the length of the rotating shaft 341, thereby supporting both ends of the rotating shaft 341. The second housing 312 and the slots 354 on the fixing member 35 jointly support the rotating shaft 341, ensuring that the rotating shaft 341 can rotate and does not fall off.

[0052] During assembly, the safety switch component 34 is first placed on the second shell 312, and then the slot 354 of the fixing member 35 is placed corresponding to the rotation axis 341 to limit the freedom of the safety switch component 34. The fixing member 35 is fixed to the second shell 312 by screws, and then the control switch 33 is placed in the switch accommodating cavity 351 of the fixing member 35, and then a pressure plate 355 is fixed to the fixing member 35 by screws. Finally, the third shell 313 and the first shell 311 are assembled to the second shell 312 in turn, thereby completing the assembly of the key parts of the main body 3.

[0053] In this embodiment, the backpack power supply system 100 also includes a simulated battery pack 2 that has the same appearance as the battery pack 1. The main body 3 is connected to the simulated battery pack 2 via a cable 5. The main body 3 is provided with a battery pack receiving portion 36 for connecting to the battery pack 1. When stored, the simulated battery pack 2 can be connected to the battery pack receiving portion 36, thereby being fixed to the main body 3. When the power tool needs to be used in conjunction with the backpack power supply system 100, the user needs to remove the simulated battery pack 2 from the main body 3, plug the battery pack 1 into the main body 3, then wear the entire backpack power supply system 100 on the body, and then connect the simulated battery pack 2 to the power tool. This achieves the purpose of transferring the heavy battery pack 1 from the power tool to the backpack power supply device, helping to reduce the weight on the user's hands.

[0054] As shown in Figure 10 , the end of the cable 5 away from the main body 3 is provided with an electrical connector 51. The dummy battery pack 2 is provided with an electrical receiver 21 corresponding to the electrical connector 51. The electrical connector 51 is plugged into the electrical receiver 21 to complete the circuit connection. In this embodiment, both the electrical connector 51 and the electrical receiver 21 are equipped with foolproof structures to ensure accurate and safe insertion.

[0055] In the present invention, the safety switch component 34 is provided with an axially extending rotational axis 341, and a first contact portion 342 and a second contact portion 343 disposed at both ends of the safety switch component 34 in an axial direction perpendicular to the rotational axis 341. The first contact portion 342 is disposed away from the rotational axis 341 and is used to contact the battery pack 1. The second contact portion 343 is disposed close to the rotational axis 341, and when the second contact portion 343 rotates about the rotational axis 341 until it becomes tangential to the bottom surface of the push rod 331, the push rod 331 of the control switch 33 is pushed onto the contact point. The provision of the safety switch can effectively prevent the situation where the circuit is connected when the battery pack 1 contacts the entire device, thereby preventing the electrode holder of the battery pack 1 from igniting. This improves the safety factor of operation and increases the service life of the backpack power supply system 100.

[0056] The present invention is not limited to the specific embodiments described above. Those skilled in the art will readily appreciate that there are many alternatives to the backpack power supply system of the present invention without departing from the principles and scope of the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A backpack power supply system, comprising a battery pack, a main body carrying the battery pack, and a wearable device connected to the main body, wherein the main body comprises a housing, a control switch accommodated in the housing, and a safety switch component for controlling the on / off state of the control switch, wherein the control switch is provided with a flat push rod and a contact convexly provided on the surface of the control switch, and the safety switch component can push the push rod to press onto the contact; characterized in that: The safety switch component is provided with a rotating shaft extending axially, a first contact portion and a second contact portion arranged at both ends of the rotating shaft along a longitudinal direction perpendicular to the axial direction, the first contact portion at least partially protruding out of the housing and used to abut against the battery pack, and the second contact portion is arranged close to the push rod; when the battery pack is plugged into the main body, the battery pack pushes the first contact portion to drive the second contact portion to rotate around the rotating shaft until it is tangent to the bottom surface of the push rod, and at this time the push rod of the control switch pushes the contact to turn on the control switch.

2. The backpack power supply system according to claim 1, characterized in that: The safety switch component is provided with a rounded surface located at the top of the second contact portion, and the rounded surface contacts the bottom surface of the push rod and pushes the push rod to swing.

3. The backpack power supply system according to claim 1, characterized in that: The housing comprises a first shell, a second shell and a third shell which are interlocked, the first shell, the second shell and the third shell are jointly surrounded to form a receiving cavity, and the safety switch component is at least partially received in the receiving cavity.

4. The backpack power supply system according to claim 3, characterized in that: The safety switch component includes an elastic component located in the accommodating cavity, one end of the elastic component abuts against the bottom wall of the first contact portion and the other end of the elastic component abuts against the inner wall of the third housing.

5. The backpack power supply system according to claim 4, characterized in that: The safety switch component includes at least two elastic components, and the two elastic components respectively support two axial ends of the first contact portion.

6. The backpack power supply system according to claim 5, characterized in that: The safety switch component is provided with a limiting portion protruding outwardly along the longitudinal direction of the first contact portion. When the battery pack is not installed to the main body, the first contact portion is lifted by the elastic component and the limiting portion abuts against the inner wall of the second shell.

7. The backpack power supply system according to claim 1, characterized in that: The main body includes a fixing member supported on the housing, and the control switch is fixed on the fixing member.

8. The backpack power supply system according to claim 7, characterized in that: The fixing member is provided with two supporting feet protruding downward and parallel to each other and a mounting gap formed between the two supporting feet. The push rod of the control switch at least partially extends into the mounting gap, and the second contact portion swings around the rotating axis in the mounting gap to push the push rod.

9. A backpack power supply system, comprising a battery pack, a main body carrying the battery pack, and a wearable device connected to the main body, wherein the main body comprises a housing, a control switch housed in the housing, and a safety switch component for controlling the on / off state of the control switch, wherein the control switch is provided with a flat push rod and a contact convexly provided on the surface of the control switch, and the safety switch component can push the push rod to press onto the contact; characterized in that: The casing includes a first shell, a second shell and a third shell that are interlocked, and the first shell, the second shell and the third shell together form a accommodating cavity, and the safety switch component is at least partially accommodated in the accommodating cavity, wherein the second shell is provided with an opening passing through the bottom, and the safety switch component can pass through the opening portion to the outside of the casing.

10. A backpack power supply system, comprising a battery pack, a main body carrying the battery pack, and a wearable device connected to the main body, characterized in that: It also includes a simulated battery pack, the main body is connected to the simulated battery pack through a cable, an electric plug is provided at one end of the cable away from the main body, an electric receiving part corresponding to the electric plug is provided on the simulated battery pack, and an anti-fool structure is provided between the electric plug and the electric receiving part.

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