JP2014017099A - Backpack power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backpack power supply 1 mounting a secondary battery 51.SOLUTION: The backpack power supply 1 includes a case 5 housing a battery pack 51, a backpack part 6 for backpacking the case 5, cables 64, 58 extending from the case, and a cover 63a formed on the backpack part 6. The cables 64, 58 pass through a space 63b formed between the backpack part 6 and the cover 63a, and the extra part of the cables 64, 58 can be housed in the space 63b.

Description

  The present invention relates to a backpack type power source equipped with a secondary battery.

  Conventionally, as a portable power source for an electric tool or the like, a battery holster that accommodates a secondary battery and can be worn on the waist is known (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 7-3983

  The present invention intends to provide a back-type power source which is a portable power source having a capacity larger than that of the battery holster.

  In order to solve the above-mentioned problems, the present invention is formed on a case portion that houses a battery pack, a backpack portion for carrying the case portion, a cable extending from the case portion, and the backpack portion. A cover portion, wherein the cable passes through a space formed between the backpack portion and the cover portion, and the space can store an excess portion of the cable. We provide a characteristic backpack power supply.

  According to such a configuration, since the extra portion of the cable can be stored in the space formed between the backpack and the cover, the extra portion of the cable is caught on a branch or the like during the operation by the backpack power source. It is possible to suppress danger and a decrease in work efficiency due to an extra portion of the cable. In addition, since an extra portion of the cable does not occur regardless of the user's physique, there is no difference in convenience of the backpack power source depending on the physique of the user.

  The backpack power source according to the present invention also includes a remaining amount display portion provided at the end of the cable for displaying the remaining amount of the battery pack, and engageable with the backpack portion and storing the remaining amount display portion. It is preferable that the remaining amount display portion is housed in the housing portion after being inserted through the space together with the cable.

  In order to insert the space formed between the backpack and the cover, it is preferable that the remaining amount display unit is in a simple state that is not stored in the storage unit or the like. On the other hand, the remaining amount display portion in a simple state is vulnerable to impact and the like. According to the configuration of the present invention, the remaining amount display portion is stored in the storage portion after passing through the space formed between the backpack portion and the cover portion. However, damage to the remaining amount display portion is suppressed.

  According to another aspect of the present invention, a case portion that houses a battery pack, a backpack portion for carrying the case portion, a cable extending from the case portion, and a remaining amount of the battery pack are displayed. A remaining amount display portion provided at a distal end of the cable, and a storage portion that can be engaged with the backpack and that can store the remaining amount display portion. A shoulder-type power source characterized by having a visible transmissive portion is provided.

  According to such a configuration, the user can visually recognize the remaining amount display unit while the remaining amount display unit is held on the back.

  According to another aspect of the present invention, a case portion that houses a battery pack, a backpack portion for carrying the case portion, a cable extending from the case portion, and a remaining amount of the battery pack are displayed. A remaining amount display portion provided at the end of the cable and engaged with the backpack, so that the remaining portion can be viewed from above by the user in a state where the case portion is carried on the back. A backpack type power supply characterized by being rotatable is provided.

  According to such a configuration, the user can visually recognize the remaining amount display unit while the remaining amount display unit is held on the back.

  According to the present invention, it is possible to provide a back-type power source that is a large-capacity portable power source.

Explanatory drawing of the usage example of the back load type power supply by the 1st Embodiment of this invention The front view of the backpack type power supply by the 1st Embodiment of this invention The rear view of the backpack type power supply by the 1st Embodiment of this invention The side view of the case part by the 1st Embodiment of this invention The rear view of the case part by the 1st Embodiment of this invention 1 is a side sectional view of a backpack type power supply according to a first embodiment of the present invention. Side view of the pocket according to the first embodiment of the invention The top view of the operation part by the 1st Embodiment of this invention Explanatory drawing of the accommodating part by the 1st Embodiment of this invention 1 is a circuit diagram of a back-type power supply, an adapter, and a charger according to a first embodiment of the present invention. Explanatory drawing of the connection of the backpack type power supply and adapter by the 1st Embodiment of this invention Explanatory drawing of the connection to the electric tool of the adapter by the 1st Embodiment of this invention Circuit diagram of backpack type power supply, adapter and charger according to second embodiment of present invention Explanatory drawing of the connection of the adapter to the backpack type power supply by the modification of this invention The perspective view of the storage member by the modification of this invention The perspective view of the adapter engaged with the storage member by the modification of this invention The external view of the accommodating part of the adapter by the modification of this invention Explanatory drawing of the accommodating part of the adapter attached to the waist belt by the modification of this invention The external view of the accommodating part of the adapter by the modification of this invention Explanatory drawing of the accommodating part of the adapter attached to the case part by the modification of this invention The top view of the operation part by the modification of this invention

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the backpack type power source 1 according to the present embodiment is for performing work with the electric tool 2 while carrying the battery pack 51 (FIG. 7) accommodated therein.

  The power supply from the battery pack 51 to the electric tool 2 is performed in a state where the adapter 3 is connected between the backpack type power source 1 and the electric tool 2. Moreover, the battery pack 51 accommodated in the backpack-type power supply 1 can be charged by the charger 4 (FIG. 7). Between these, the adapter 3 is connected.

  As shown in FIGS. 2A and 2B, the back load type power source 1 includes a case portion 5 and a back load portion 6. 1 and 2 and other drawings may have slightly different patterns and shapes of the appearance of the backpack type power supply 1, but in the present embodiment, it will be described as a configuration having the same function.

  The case part 5 has a box shape, and accommodates a battery pack 51 and a control board 52 therein (FIG. 7). As shown in FIG. 3, a main power switch 53 is provided on the side surface of the case portion 5.

  The battery pack 51 is composed of a plurality of secondary batteries 5c (FIG. 7) connected in series. In the present embodiment, the battery pack 51 has a large capacity. Specifically, the battery pack 51 has a configuration in which a plurality of units of a plurality of secondary batteries connected in series are arranged in parallel.

  The configurations of the control board 52 and the main power switch 53 will be described later.

  As shown in FIGS. 3 and 4, the case portion 5 has a back contact surface 54 that is in contact with the back of the user in a substantially quadrangular shape made of a metal such as resin or aluminum. A plurality of concave portions 55 and convex portions 56 extending in the direction are alternately formed. Therefore, when carrying the backpack-type power supply 1, the user's back abuts against the convex portion 56 via the pad portion 61 described later, and there is a space between the user's back (pad portion 61) and the concave portion 55. Will exist.

  As described above, since the battery pack 51 according to the present embodiment has a large capacity, the temperature of the battery pack 51 may rise to a temperature at which the user feels uncomfortable with the use of the backpack power supply 1. There is. However, with the backpack type power source 1 according to the present embodiment, the above configuration ensures air permeability between the user's back and the backrest surface 54, and therefore the heat generated in the battery pack 51 by the user's back. Transmission to the user and the occurrence of stuffiness on the user's back are greatly reduced.

  In particular, in the present embodiment, as shown in FIGS. 3 and 4, the plurality of concave portions 55 and convex portions 56 extend in the left-right (horizontal) direction.

  With such a configuration, wind often blown in the left-right direction is formed between the user's back and the recess 55 and easily passes through the space extending in the left-right direction. Transmission to the user's back and the occurrence of stuffiness on the user's back are further reduced.

  Further, in the present embodiment, as shown in FIG. 5, the inside of the convex portion 56 that comes into contact with the user's back is a cavity in which the battery pack 51, the control board 52, and the like are not arranged.

  With such a configuration, the user's back and the battery pack 51 can be insulated in adiabatic manner, so that heat generated in the battery pack 51 is transmitted to the user's back and stuffiness on the user's back is prevented. Occurrence is further reduced.

  As shown in FIG. 4, a cable extension hole 57 is formed in the lower portion of the back abutment surface 54, and a power cable 58 connected to the electric power tool 2 (adapter 3) is formed from the cable extension hole 57. Extends upward from the horizontal direction.

  With such a configuration, when the user sits on the ground or the like with the back-type power supply 1 on the back, the operation of the power cable 58 hitting the ground or the like is prevented from being hindered.

  Further, as shown in FIGS. 3 and 4, a guide groove 57 a is formed on the back abutment surface 54 so as to extend from the cable extension hole 57 in the left-right direction.

  According to such a configuration, the power cable 58 is guided toward the left or right end portion of the back surface 54 along the guide groove 57a formed to extend in the left-right direction. Depending on the relationship between the user's dominant arm and the power tool 2, the user can extend the power cable 59 in a desired direction, improving workability. In addition, it is possible to prevent the working efficiency from being lowered due to the power cable 58 hanging down during the work by the electric power tool 2 connected to the tip of the power cable 58.

  As shown in FIGS. 2A, 2B, and 5, the backpack portion 6 includes a pad portion 61, a pair of shoulder belts 62, and a pair of waist belts 63.

  The pad portion 61 is disposed between the user's back and the backrest surface 54 and is formed of a non-rigid member having substantially the same size as the backrest surface 54.

  As shown in FIGS. 2B and 5, the pad portion 61 has a plurality of recesses (61 b) formed by a plurality of contact portions 61 a having cushioning properties. With such a configuration, air permeability is ensured between the user's back and the pad portion 61, so that heat generated in the battery pack 51 is transmitted to the user's back and stuffy on the user's back. The occurrence of has been reduced.

  A pair of top straps 61 c extending from the case portion 5 are attached to the shoulder belt 62 at both left and right ends of the pad portion 61, as shown in FIGS. 2 (a), 2 (b), and 5. Is engaged. The user can adjust the gap between the user's back (pad portion 61) and the case portion 5 by adjusting the length of the top strap 61c, and the load of the case portion 5 can be adjusted to the shoulder belt 62. Can be dispersed efficiently. Thereby, it becomes possible to fit the case part 5 to a user's back. In addition, since the center of gravity of the case portion can be brought close to the user, it is possible to reduce the possibility of the user falling over in the back direction. Furthermore, since the load of the case part 5 is efficiently distributed to the shoulder belt 62, it becomes possible to significantly reduce user fatigue.

  The pair of shoulder belts 62 are spanned across the upper and lower portions at both ends of the pad portion 61, and the user passes the shoulder through the space formed by the shoulder belt 62, so that the backpack type power source 1. Can be carried on the back.

  A pair of waist belts 63 extend substantially horizontally from the lower portions of both end portions of the pad portion 61. The front end portions of the pair of waist belts 63 can be engaged with each other. By engaging the front end portions, it is possible to fit the backpack type power source 1 (backrest surface 54) to the user's body. It has become.

  In addition, an auxiliary belt for enabling the left and right shoulder belts 62 to be engaged in the horizontal direction may be provided on the upper portion of the waist belt 63. With such a configuration, the user moves his / her body during use. In addition, it becomes possible to reduce the slip between the back-type power source 1 (back surface 54) and the user's body.

  The pad portion 61 to which the shoulder belt 62 and the waist belt 63 are connected is screwed to a plurality of screw holes 59 (FIGS. 4 and 5) formed in the back contact surface 54.

  In the backpack-type power source 1 according to the present embodiment, the battery pack 51 has a considerable weight, and therefore sufficient attention is required for the engagement between the case portion 5 and the backpack portion 6.

  In the backpack type power supply 1 according to the present embodiment, the pad portion 61 is screwed into the plurality of screw holes 59 formed in the back contact surface 54, so that the connection between the case portion 5 and the backpack portion 6 is prevented from being disconnected. Has been. Further, the structure having the top strap 61c distributes the force necessary for the engagement between the case portion 5 and the backpack portion 6.

  Further, the plurality of screw holes 59 are formed at the center side with respect to both end portions in the left-right direction of the pad portion 61 (backing surface 54).

  According to such a configuration, since both end portions in the left-right direction of the pad portion 61 are not fixed to the case portion 5, the pad portion 61 formed by the non-rigid member can be curved and fit to the user's body. It is possible.

  As shown in FIGS. 2A and 2B, an operation cable 64 connected to the control board 52 extends from the case portion 5, and an operation cable 64 is connected to the distal end of the operation cable 64. Part 65 is connected.

  Here, as shown in FIG. 2A and FIG. 6A, a pocket (cover) 63a is attached to each waist belt 63, and between the pocket 63a and the waist belt 63, A space 63b is formed in which the operation portion 65 and the operation cable 64 can be inserted and an extra portion of the operation cable 64 can be stored.

  According to such a configuration, it is possible to suppress a possibility that an extra portion of the operation cable 64 may be caught on a branch or the like during work by the backpack type power source 1 and a decrease in work efficiency due to the extra portion of the operation cable 64. It becomes possible. Further, since no extra portion of the operation cable 64 is generated regardless of the user's physique, the difference in convenience of the backpack power source 1 due to the physique of the user is eliminated.

  As shown in FIG. 6B, the operation unit 65 has a box shape, and a sub power switch 66, a remaining amount switch 67, a remaining amount display LED 68a, a power LED 68b, and an abnormal LED 68c are formed on the surface thereof. , Provided.

  The user can stop the supply of electric power from the back load type power source 1 to the electric tool 2 by turning off the sub power switch 66, and the remaining amount display LED 68a can be displayed by operating the remaining amount switch 67. The remaining amount of the battery pack 51 can be displayed in five levels.

  As described above, since the operation unit 65 is attached to the waist belt 63 extending from the case unit 5, the battery can be used when the user is carrying the case 5, that is, when working with the electric tool 2. It is easy to check the remaining amount of the pack 51 and the like.

  Further, as shown in FIG. 2B, a storage part 69 for storing the operation part 65 is attached to the waist belt 63.

  In order to insert the space 63b formed between the waist belt 63 and the pocket 63a, it is preferable that the operation unit 65 is in a simple state that is not stored in the storage unit 69 or the like. The operation unit 65 that is not housed in the unit 69 is vulnerable to excessive impacts, more than expected flooding, and the like.

  Therefore, in the present embodiment, the operation unit 65 is stored in the storage unit 69 after passing through the space 63b formed between the waist belt 63 and the pocket 63a. While facilitating the insertion of the 65 into the space 63b, the operation unit 65 is further prevented from being damaged or short-circuited.

  The storage portion 69 is formed with a transmission portion 69a through which the user can visually recognize the remaining amount display LED 68a, the power LED 68b, and the abnormality LED 68c.

  With such a configuration, the user can visually recognize the remaining amount display LED 68a and the like while the remaining amount display LED and the like are held on the waist belt 63.

  Further, as shown in FIG. 6C, the storage portion 69 is configured to be rotatable with its upper portion as a fulcrum.

  With such a configuration, the user can visually recognize the remaining amount display LED 68a and the like in a state where the operation unit 65 is held on the waist belt 63.

  Next, the configuration of the control board 52 accommodated in the case unit 5 will be described with reference to FIG. As shown in FIG. 7, the back-type power source 1 on which the control board 52 is mounted is connected to the charger 4 via the adapter 3 to constitute the charging system A. The back-type power source 1 is connected to the power tool 2 through the same adapter 3.

  The control board 52 includes a battery-side plus terminal 5a and a battery-side minus terminal 5b. The control board 52 includes the main power switch 53, the regulator 521, the switching element 522, and the cutoff circuit 523 described above. A protection IC 524, a thermistor 525, and a battery-side microcomputer 526 are mounted.

  The battery side positive terminal 5a and the battery side negative terminal 5b are connected to the power cable 58, and the battery side positive terminal 5a and the battery side negative terminal 5b are respectively connected to the positive terminal 51a and the negative terminal 51b of the battery pack 51. It is connected. Between the plus terminal 51a and the battery side plus terminal 5a of the battery pack 51, a main power switch 53, a switching element 522, and a cutoff circuit 523 are connected in that order.

  The regulator 521 is connected to a contact point between the main power switch 53 and the switching element 522, transforms the voltage output from the battery pack 51, and supplies it as a drive voltage to the protection IC 524 and the battery-side microcomputer 526.

  The switching element 522 is composed of an FET. The sub-power switch 66 described above is connected to the battery-side microcomputer 526. When the sub-power switch 66 is turned off, the battery-side microcomputer 526 outputs an off signal to the gate of the switching element 522 so that the switching element 522 is turned on. Turn off.

  In such a configuration, the regulator 521 is connected to the current path closer to the battery pack 51 than the switching element 522, so the sub power switch 66 that is mainly used to stop the power supply to the electric tool 2. Even if the (switching element 522) is turned off, the driving power is supplied to the protection IC 524 and the battery-side microcomputer 526.

  However, the back-type power source 1 according to the present embodiment is suitable for an electric tool that is frequently used only in a predetermined season, and is left in a state where only the sub power switch 66 (switching element 522) is turned off. Then, power is continuously supplied to the protection IC 524 and the battery-side microcomputer 526. As a result, the remaining capacity of the battery pack 51 decreases in the next season, and in some cases, the battery pack 51 may be deteriorated due to overdischarge or the like. There is.

  In view of this, in the backpack type power supply 1 according to the present embodiment, the main power switch 53 is provided on the current path closer to the battery pack 51 than the switching element 522, and the regulator 521 has a current path between the main power switch 53 and the switching element 522. It is connected to the.

  With such a configuration, when the back-type power supply 1 is not used for a long time, the main power switch 53 is turned off to cut off the power supply to the protection IC 524 and the battery-side microcomputer 526. The battery pack 51 can be prevented from being deteriorated due to waste or overdischarge.

  In the present embodiment, since the main power switch 53 is composed of a mechanical switch, the entire circuit can be stopped regardless of the sub power switch 66.

  In this embodiment, since a large-capacity battery pack 51 capable of supplying a current of 30 A is employed, the main power switch 53 is also capable of withstanding such a large current.

  As shown in FIG. 3, the main power switch 53 is provided on the side surface of the case unit 5 in the back load type power supply 1 according to the present embodiment. The main power switch 53 is preferably provided at a position where it can be operated not only on the side surface in the present embodiment but also on the lower surface of the case portion 5 even when the user is carrying it. With such a configuration, the user does not prevent the main power switch 53 from being accidentally turned off during work, and the user can turn off the back-type power source 1 when it is necessary to quickly stop all circuits. The power supply and the entire circuit can be stopped while carrying on the back.

  The cutoff circuit 523 is configured by an FET, and based on the control by the battery side microcomputer 526, the current path formed by the battery side positive terminal 5a, the battery pack 51, and the battery side negative terminal 5b is released / cut off. Do.

  The protection IC 524 outputs a charge stop signal to the battery-side microcomputer 526 when it detects full charge of the battery pack 51 during charging, and when it detects overdischarge or overcurrent of the battery pack 51 during discharge. The discharge stop signal is output to the battery-side microcomputer 526.

  The thermistor 525 outputs the temperature of the battery pack 51 to the battery-side microcomputer 526 as a battery temperature signal.

  The battery-side microcomputer 526 causes the cutoff circuit 523 to cut off the current path when a charge stop signal or a discharge stop signal is input from the protection IC 524.

  In addition, since the battery pack 51 may be deteriorated and become unusable when the temperature becomes high, the battery-side microcomputer 526 indicates that the battery temperature signal input from the thermistor 525 indicates a predetermined temperature or more. Even in some cases, the interrupting circuit 523 interrupts the current path.

  In addition, when charging, the charger 4 that does not conform to the standard of the battery pack 51 is connected to the back-type power source 1 so that a voltage or current larger than the standard of the battery pack 51 is supplied from the charger 4 to the battery. Even when the battery pack 51 is supplied, the battery pack 51 may become unusable.

  Accordingly, the battery-side microcomputer 526 detects the voltage and current supplied to the battery pack 51 (voltage / current detection signal), and shuts off even when the voltage or current supplied to the battery pack 51 is greater than or equal to a predetermined value. The circuit 523 interrupts the current path.

  Thus, in the backpack type power supply 1 according to the present embodiment, when the battery pack 51 detects full charge or abnormality, the current path is interrupted on the battery pack 51 side. Therefore, it is possible to reliably stop the supply of power to the battery pack 51 at the time of full charge or abnormality independently in the main body of the back load type power source 1 without depending on the charger 4 connected to the back type power source 1. Therefore, the deterioration of the battery pack 51 and the like are suppressed, and the possibility of being unusable is reduced.

  Next, the configuration of the charger 4 will be described.

  The charger 4 includes a charger-side plus terminal 4a, a charger-side minus terminal 4b, a battery type input terminal 4c, a battery temperature input terminal 4d, a power source 41, and a charger-side microcomputer 42. It is a charger.

  The power source 41 converts AC power from a commercial power source into DC power and outputs it as charging power from the charger side positive terminal 4a and the charger side negative terminal 4b.

  The charger side microcomputer 42 controls the charging voltage and charging current output from the power source 41 based on the battery type signal input to the battery type input terminal 4c and the battery temperature signal input to the battery temperature input terminal 4d. However, the charger side microcomputer 42 does not perform a charging operation when a signal included in the predetermined range is not input to the battery type input terminal 4c and the battery temperature input terminal 4d, that is, the charger side positive terminal. The power supply 41 is controlled so that a voltage is not applied between 4a and the charger side minus terminal 4b.

  Next, the configuration of the adapter 3 will be described.

  The back-type power source 1 is connected to the power tool 2 or the charger 4 via the adapter 3 connected to the power cable 58.

  As shown in FIGS. 7 and 8, the power cable 58 is detachably connected to the back-type power source 1 and the adapter 3 by screwing via connectors 58a and 58b provided at both ends.

  According to such a configuration, even if the power cable 58 is accidentally disconnected during the work, it is possible to easily replace the power cable 58 and resume the work. In addition, since the power cable 58 can be replaced with one having a thickness corresponding to the rated output of the power tool 2, for example, when the power cable 58 is connected to the low-power power tool 2, a thin power cable 58 is provided. It is possible to greatly improve the work efficiency by exchanging them.

  Further, as shown in FIG. 8, the power cable 58 includes connectors 58c and 58d that are connected to each other by screwing. By releasing the connection, the power cable 58 is connected to the back-type power source 1 side and the adapter. It can be separated into three sides.

  According to such a configuration, the adapter 3 can be easily separated from the backpack type power source 1, and therefore, for example, it is possible to prevent an extra weight from being applied to the user during a break.

  As shown in FIGS. 8 and 9, the adapter 3 includes a lateral slide type connection portion 31 connected to the electric tool 2 on the upper surface, and the power cable 58 extends downward from the lower surface. It is connected to the.

  According to such a configuration, the direction in which the force from the power cable 58 is applied to the adapter 3 (vertical direction in FIGS. 8 and 9) and the direction in which the engagement between the adapter 3 and the power tool 2 is released (FIGS. 8 and 8). Since the left and right directions in FIG. 9 are different from each other, the engagement between the adapter 3 and the power tool 2 is suppressed during the operation.

  In particular, in the present embodiment, the direction in which the force from the power cable 58 is applied to the adapter 3 (vertical direction in FIGS. 8 and 9) and the direction in which the engagement between the adapter 3 and the power tool 2 is released (FIGS. 8 and 8). The right and left direction in FIG. 9 is orthogonal to each other.

  According to such a configuration, the vertical force applied from the power cable 58 to the adapter 3 functions as a frictional force with respect to the horizontal force for releasing the engagement between the adapter 3 and the power tool 2. The release of the engagement between the power tool 3 and the power tool 2 is effectively suppressed.

  Returning to FIG. 7, the circuit configuration of the adapter 3 will be described.

  The adapter 3 includes a first adapter side plus terminal 3a, a first adapter side minus terminal 3b, a second adapter side plus terminal 3c, a second adapter side minus terminal 3d, a pseudo battery type output terminal 3e, and a pseudo battery. A temperature output terminal 3f, a discharge stop signal output terminal 3g, and a pseudo signal output means 32 are provided.

  The first adapter side plus terminal 3a and the first adapter side minus terminal 3b are configured to be connectable to the charger side plus terminal 4a and the charger side minus terminal 4b, respectively.

  The second adapter side positive terminal 3c and the second adapter side negative terminal 3d are connected to the battery side positive terminal 5a and the battery side negative terminal 5b via the power cable 58, respectively.

  Moreover, the pseudo battery type output terminal 3e and the pseudo battery temperature output terminal 3f are configured to be connectable to the battery type input terminal 4c and the battery temperature input terminal 4d, respectively.

  The discharge stop signal output terminal 3g can be connected to the discharge stop signal input terminal of the electric tool 2.

  The pseudo signal output means 32 outputs a pseudo signal included in the predetermined range via the pseudo battery type output terminal 3e and the pseudo battery temperature output terminal 3f.

  Here, the back-type power source 1 according to the present embodiment is configured to be able to supply a large current with the large-capacity battery pack 51, but in order to supply a large current, a thick power cable 58 is required. come. On the other hand, since the thick power cable 58 may reduce the working efficiency of the power tool 2, the power cable 58 is desirably slim.

  Therefore, in the present embodiment, the battery type output terminal, the battery temperature output terminal, and the discharge stop signal output terminal are not used for the backpack type power supply 1, and the power cable 58 does not include signal lines corresponding to those terminals. The slim power cable 58 is realized while being able to supply a large current.

  However, since the back-type power supply 1 having such a configuration cannot output a battery type signal and a battery temperature signal, the charger 4 configured to start power supply based on such a signal performs a charging operation. I can not let you.

  Therefore, in the present embodiment, the adapter 3 is connected between the backpack type power supply 1 and the charger 4, and the pseudo signal included in the predetermined range is output from the pseudo signal output means 32 of the adapter 3. 4 is charged.

  On the other hand, since the pseudo signal output from the pseudo signal output means 32 of the adapter 3 does not change even when the battery pack 51 is fully charged or abnormal, the charging operation is stopped on the charger 4 side in such a configuration. I can't.

  Therefore, in the present embodiment, when full charge or the like is detected, the current path is interrupted by the interrupting circuit 523, and charging to the battery pack 51 provided in the main body 1 of the backpack type power supply is stopped.

  As a result, a slim power cable 58 can be realized while supplying a large current, and at the same time, charging of the battery pack 51 can be appropriately stopped when the battery pack 51 is fully charged or abnormal.

  In addition, the electric tool 2 includes a discharge cutoff circuit, and has a conventional configuration in which when the battery pack 51 detects overdischarge or overcurrent, the discharge cutoff circuit interrupts the current path. Moreover, since the adapter 3 of this structure has detected the voltage and the electric current with the microcomputer mounted, when the adapter 3 detects abnormalities, such as an overcurrent and an excessive voltage drop, discharge of the said electric tool 2 is carried out. A signal for interrupting the current path can be sent to the interrupting circuit.

  As described above, in the back load type power source 1 according to the present embodiment, when overdischarge or over current occurs, the current path is interrupted on both the back load type power source 1 side and the power tool 2 side. It is possible to more appropriately suppress the possibility of deterioration or unusability.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the present embodiment, the charger-side microcomputer 42 of the charger 4 has a timer function that counts the time from the start of charging. When the count exceeds a predetermined time, it is determined that the battery is fully charged and the power source 41 Control is performed to stop the charging operation.

  However, in such a configuration, when the battery pack 51 that requires a charging time longer than the predetermined time is connected to the charger 4, the battery pack 51 cannot be fully charged.

  Therefore, in the present embodiment, the adapter 3 is provided with the charger reset means 33, and before the predetermined time has elapsed from the start of charging, the timer reset signal is sent from the charger reset means 33 to the charger side microcomputer 42 of the charger 4. Output to reset the count and continue charging.

  With such a configuration, even when the battery pack 51 that requires a charging time longer than the predetermined time is connected to the charger 4 having the timer function, the battery pack 51 is charged before it is fully charged. Can be prevented from ending.

  However, in this case, since the charger 4 cannot determine full charge, the battery pack 51 may be charged until it is overcharged. However, as described above, the back load type power source 1 according to the present embodiment can determine that the battery pack 51 is fully charged and interrupt the current path. With such a configuration, it is possible to charge the battery pack 51 having various capacities to full charge while preventing the battery pack 51 from being overcharged.

  The power tool according to the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims.

  For example, as shown in FIG. 11, the adapter 3 can be attached (stored) to the backpack power source 1, and when the adapter 3 is attached to the backpack power source 1, the main power switch 53 is turned off. It may be.

  According to such a configuration, it is possible to prevent the main power switch 53 from being forgotten to be turned off at the end of the work, so that the battery pack 51 is prevented from being overdischarged.

  For the same purpose, the main power switch 53 may be turned off when the connector 58a of the power cable 58 is detached from the back-type power source 1.

  In addition, as shown in FIGS. 12A and 12B, the adapter 3 and the waist belt 63 are connected to the waist belt 63 in order to prevent the adapter 3 from interfering with the operation of the user when not connected to the electric power tool 2. An engageable adapter storage member 34 may be provided. 12 (a) and 12 (b), the waist belt 63 is configured to pass through the insertion hole 34a of the adapter storage member 34. However, the configuration is such that the waist belt 63 is simply caught. May be.

  Further, as shown in FIG. 12, by providing the adapter 3 with a winding portion 34b for winding the power cable 58, it is possible to prevent the extra power cable 58 from interfering with the user's operation. .

  Further, as shown in FIGS. 13A and 13B, the accommodating portion 36 that can accommodate the adapter 3 may be attached to the waist belt 63 via the engaging portion 63 c. FIG. 13A is a side view of the accommodating portion 36, and FIG. 13B is a plan view of the accommodating portion 36.

  Further, as shown in FIGS. 14A and 14B, an accommodation portion 37 that can accommodate the adapter 3 may be attached to the lower end of the case portion 5 or the backpack portion 6 in the vicinity thereof.

  In addition, the accommodating part 37 shown to Fig.14 (a) and FIG.14 (b) winds cloth etc. in cylindrical shape, and the closure string 37a is attached to the both ends in the left-right direction. The user is configured to be able to close the open end of the accommodating portion 37 by narrowing the closing string 37a.

  In a state where the backpack type power supply 1 is carried, the user performs the operation of housing the adapter 3 in the housing portion 37 engaged with the case portion 5 with the rear hand. It can be accommodated in the accommodating portion 37.

  Further, as shown in FIG. 15, a remaining amount display LED 68 a, a power LED 68 b, and an abnormality LED 68 c may be provided on the upper surface of the operation unit 65.

  According to such a configuration, the user can check the remaining amount of the battery pack 51 and the like without tilting the operation unit 65.

  Moreover, although the adapter 3 by the said embodiment output the voltage output from the back negative power supply 1 to the electric tool 2 as it is, in order to respond | correspond to the electric tool 2 which has various rated voltages, it transforms in the adapter 3. You may go. In this case, the power cable 58 can be replaced with one having a thickness corresponding to the rated output of the electric tool 2. For example, when the power cable 58 is connected to the low-power electric tool 2, a thin power cable By exchanging with 58, work efficiency can be improved.

  For the same purpose, the back-type power supply 1 may be provided with a voltage conversion circuit. In this case, the voltage conversion circuit is preferably connected to the battery side positive terminal 5a rather than the main power switch 53 in order to prevent waste of power when not in use.

  In the above-described embodiment, the operation unit 65 communicates with the battery-side microcomputer 526 using the flat cable 64. However, the operation unit 65 may perform communication using a curl code or wirelessly.

  In the above embodiment, the operation unit 65 is detachably attached to one waist belt 63 by means of a hook-and-loop fastener, but may be attached by a transparent pocket, a hook, a clip, or the like. It may be attached to.

  In the second embodiment, the charger-side microcomputer 42 determines that the charging operation is stopped when a reset signal is input and that the reset signal is input when the signal is interrupted. Therefore, the charger reset means 33 of the adapter 3 may output or block a signal according to the type of the charger side microcomputer 42.

  In addition, in order to suppress the occurrence of displacement between the pad portion 61 and the backrest surface 54, a horizontally extending recess 55 formed on the backrest surface 54 is formed on the surface of the pad portion 61 that faces the backrest surface 54. A plurality of grooves extending in the vertical direction perpendicular to the convex portions 56 may be formed.

  Further, in the first embodiment, when the battery pack 51 is fully charged or abnormal is detected, the current path is interrupted by the cutoff circuit 523. However, when at least one of the battery pack 51 is fully charged or abnormal is detected, the current path is interrupted. May be.

DESCRIPTION OF SYMBOLS 1 Back type power supply 2 Electric tool 3 Adapter 4 Charger 5 Case part 6 Back part

Claims (4)

A case portion containing a battery pack;
A backpack for carrying the case part on the back;
A cable extending from the case portion;
A cover portion formed on the backpack;
With
The cable is inserted through a space formed between the backpack and the cover, and an extra portion of the cable can be stored in the space. A remaining amount display portion provided at the tip of the cable for displaying the remaining amount of the battery pack;
A storage portion that can be engaged with the backpack and can store the remaining amount display portion;
Further comprising
The backpack type power supply according to claim 1, wherein the remaining amount display unit is housed in the housing unit after being inserted through the space together with the cable. A case portion containing a battery pack;
A backpack for carrying the case part on the back;
A cable extending from the case portion;
A remaining amount display portion provided at the tip of the cable for displaying the remaining amount of the battery pack;
A storage portion that can be engaged with the backpack and can store the remaining amount display portion;
With
The backpack type power supply characterized by the said accommodating part having the permeation | transmission part which can visually recognize the said remaining amount display part. A case portion containing a battery pack;
A backpack for carrying the case part on the back;
A cable extending from the case portion;
A remaining amount display portion provided at the end of the cable for displaying the remaining amount of the battery pack and engaged with the backpack;
With
The backside power supply, wherein the remaining amount portion is rotatable so that a user can visually recognize the case from above when the case portion is carried on the back.

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