JP6320894B2 - Back type power supply - Google Patents

Description

  The present invention relates to a back load type power supply device including a power supply device that supplies electric power to an electric working machine and a harness that is used to carry the power supply device on the back.

  A conventional back-type power supply device related to this is described in Patent Document 1. As shown in FIG. 17, the back-type power supply device 100 described in Patent Document 1 includes a power supply device 102 that supplies electric power charged in a cell to an electric working machine such as a pruning shears or a hedge clipper, and the power supply device 102. And a harness 104 for carrying the back. The harness 104 includes a back plate 105 disposed on the back of the worker, a shoulder belt 106 that holds the back plate 105 on the back of the worker, a waist belt 107, and the like.

JP 2011-216304 A

  In the above-described back load type power supply device 100, the power supply device 102 is generally fixed to the back plate 105 of the harness 104 by a plurality of screws (not shown). For this reason, it takes time and effort to fix the power supply apparatus 102 to the back plate 105 of the harness 104 and to remove it from the back plate 105. Further, since the vertical position cannot be adjusted between the power supply device 102 and the back plate 105 of the harness 104, for example, the upper portion of the power supply device 102 is suspended and supported by a suspension belt (not shown) provided on the upper portion of the shoulder belt 106. When doing so, it is difficult to stretch the suspension belt without loosening.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is that the power supply device can be easily fixed to and detached from the back plate of the harness, and the suspension belt is loosened. It is to be able to stretch without any tension.

  The above-described problems are solved by the inventions of the claims. The invention of claim 1 is a back-type power supply device comprising a power supply device that supplies electric power to an electric working machine and a harness that is used to carry the power supply device on the back. A back plate disposed on the back, and a shoulder belt that holds the back plate on the back of the operator, and one of the back plate of the harness and the front of the power supply unit matched to the back plate Are provided with a shaft and a plurality of connecting pins formed at the tip of the shaft and including a head having a diameter larger than that of the shaft. On the other side of the front surface of the apparatus, a plurality of long holes through which the connection pins are passed are formed at positions corresponding to the plurality of connection pins, and the long hole is one end of the long hole. Formed in the part, the head of the connecting pin can be inserted The insertion portion is formed at the other end of the elongated hole, the head of the connection pin cannot be inserted, the fixing portion through which the shaft portion can be inserted, and the insertion portion and the fixing portion are connected. And a guide portion that is capable of guiding the shaft portion in a radial direction, the head portion being unable to be inserted, so that the weight of the power supply device can be received by the guide portion via the shaft portion of the connecting pin. A configured holding part is provided.

  According to the present invention, the head of each connecting pin is inserted into the corresponding elongated hole insertion portion, the power supply device and the back plate are moved relative to each other, and the shaft portion of the connecting pin passes through the elongated hole guide portion. By moving to the fixing portion, the head of the connecting pin is hooked on the periphery of the elongated hole, and the power supply device is fixed to the back plate. For this reason, compared with the case where a power supply device is fixed to a backplate with a some screw | thread etc., the fixation and removal of a power supply device with respect to a backplate become easy. In addition, the guide portion of the elongated hole is provided with a holding portion that can receive the weight of the power supply device via the shaft portion of the connecting pin. For this reason, a power supply device can be temporarily fixed to a backplate in the state in which the axial part of a connecting pin exists in the position of the holding part of a long hole (guide part). In this state, for example, if the upper part of the power supply device is suspended and supported by the suspension belt provided on the upper part of the shoulder belt, the shaft part of the connecting pin is moved from the holding part of the elongated hole (guide part) to the fixed part after this. By doing so, the suspension belt can be stretched without loosening.

  According to the invention of claim 2, the holding portion provided in the guide portion of the elongated hole is a convex portion configured to narrow the width dimension of the guide portion, and the shaft portion of the connecting pin is the guide portion of the guide portion. The shaft portion of the connecting pin is configured to be able to pass through the convex portion when it receives a predetermined force or more in the direction passing through the convex portion. For this reason, the shaft of the connecting pin is moved by moving the power supply device and the back plate relative to each other by intentionally applying a force from the state in which the shaft portion of the connecting pin is held at the position of the convex portion of the elongated hole (guide portion). The part can pass through the convex part of the elongated hole.

  According to the invention of claim 3, the guide portion of the elongated hole is formed in a substantially arc shape. For this reason, even when the weight of the power supply device is applied to the shaft portion of the connecting pin, the shaft portion of the connecting pin can move relatively slowly along the guide portion of the elongated hole.

  According to the invention of claim 4, the guide portion of the elongated hole includes a vertical guide portion extending in the vertical direction and a horizontal guide portion extending in the horizontal direction, and the horizontal guide portion functions as the holding portion. For this reason, the shaft portion of the connecting pin can be held by the guide portion because the shaft portion of the connecting pin can pass through the lateral guide portion (holding portion) of the guide portion simply by relatively moving the back plate and the power supply device in the horizontal direction. There is no need to consciously apply great force when passing through the club.

  According to the invention of claim 5, a connecting pin is provided on the front surface of the power supply device, a long hole is provided in the back plate of the harness, and an insertion portion is formed at the upper end position in the long hole, A fixed portion is formed at the lower end position. For this reason, the shaft portion of the connecting pin can be moved to the fixing portion of the long hole of the back plate using the weight of the power supply device, and the shaft portion of the connecting pin can be securely held by the fixing portion of the long hole.

  According to the invention of claim 6, the back plate and the power supply device are relatively rotated by rotating the back plate and the power supply device in a state where the heads of the connecting pins are inserted through the insertion portions of the long holes. Each long hole is provided so that it may connect with a power supply device.

  According to the invention of claim 7, a hook of a belt that suspends and supports the electric working machine is hung on the right end portion and the right shoulder belt of the back plate of the harness or the left end portion and the left shoulder belt of the back plate. A hook receiving part is provided. That is, the electric working machine can be suspended and supported by the belt on one side of the harness. For this reason, it is possible to remove the harness from the body while the harness and the electric working machine are connected via the belt.

  According to the present invention, the power supply device can be easily fixed to and detached from the back plate of the harness, and the slack of the suspension belt and the like can be eliminated.

1 is an overall perspective view of a backpack type power supply apparatus according to Embodiment 1 of the present invention. It is the front view which looked at the back board of the harness of the said backpack type power supply device from the front. FIG. 3 is an enlarged view taken along an arrow III in FIG. 2 (a connection pin is omitted). It is a longitudinal cross-sectional view (IV-IV arrow sectional drawing of FIG. 2) showing the middle which fixes a power supply device to the backplate of a harness. It is a front view showing the relationship between the connection pin of the said power supply device, and the long hole of the backplate of a harness. It is a longitudinal cross-sectional view (enlarged exploded view of the VI arrow part of FIG. 4) showing the relationship between the connection pin of the said power supply device, and the long hole of the backplate of a harness. It is a longitudinal cross-sectional view showing the state which fixed the power supply device to the backplate of a harness. It is a front view showing the relationship between the connection pin of the said power supply device, and the long hole of the backplate of a harness. It is a longitudinal cross-sectional view (IX arrow enlarged view of FIG. 7) showing the relationship between the connecting pin of the said power supply device, and the long hole of the backplate of a harness. It is a front view (before fixation) showing the relationship between the connection pin of the power supply device which concerns on the example of a change, and the long hole of the backplate of a harness. It is a front view (after fixation) showing the relationship between the connection pin of the power supply device which concerns on the example 1 of a change, and the long hole of the backplate of a harness. It is a front view showing the relationship between the connection pin of the power supply device which concerns on the example 2 of a change, and the long hole of the backplate of a harness. It is a front view showing the relationship between the connection pin of the power supply device which concerns on the example 3 of a change, and the long hole of the backplate of a harness. It is a front view showing the long hole of the backplate concerning other examples of change. It is a side view showing the hook receiving part etc. of the said harness. It is a perspective view showing a brush cutter and a suspension belt which hangs the brush cutter. It is a model side view of the conventional backpack type power supply device.

[Embodiment 1]
Hereinafter, based on FIG. 1 to FIG. 16, the back load type power supply device 10 according to Embodiment 1 of the present invention will be described. The backpack type power supply device 10 according to the present embodiment is a device that supplies cell power to a brush cutter 50 (see FIG. 16), which is an electric working machine, and is configured to be carried by an operator on the back. Here, the front, rear, left, and right, and the top and bottom shown in the figure correspond to the front, back, left, and right and the top and bottom when the power supply device 20 of the backpack type power supply device 10 is erected (backed state).

<About Outline of Back-Load Type Power Supply Device 10 and Power Supply Device 20>
As shown in FIG. 1, the back-type power supply device 10 includes a power supply device 20 and a harness 30 for carrying the power supply device 20 on the back. The power supply device 20 includes a box-shaped resin case 21 that houses a plurality of cells (not shown) and an electric circuit (not shown) that controls charging and discharging of the cells. Further, the power supply device 20 includes an output cable 23 drawn out from the case 21, and an adapter 24 connected to the power supply connection portion 52 (see FIG. 16) of the brush cutter 50 is provided at the tip of the output cable 23. ing.

  On the front surface 21f of the case 21 of the power supply device 20 (hereinafter referred to as the case front surface 21f), as shown in FIG. A connecting pin 22 used for connecting to the terminal is provided. As shown in FIG. 6, the connecting pin 22 includes a fixing portion 22c embedded in the case 21, a shaft portion 22j protruding from the case front surface 21f, and a disc-shaped head portion 22h provided at the tip of the shaft portion 22j. It consists of and. Here, the projecting dimension of the shaft portion 22j from the case front surface 21f is set to a value larger than the thickness dimension of the back plate 32 of the harness 30 by a certain dimension. That is, the case front surface 21f corresponds to the front surface of the power supply device of the present invention.

  The fixing portion 22c, the shaft portion 22j, and the head portion 22h of the connecting pin 22 are provided coaxially. The shaft portion 22j has a larger diameter than the fixing portion 22c, and the head portion 22h has a larger diameter than the shaft portion 22j. ing. Further, as shown in FIGS. 1 and 2, a receiving portion 21 u on which a hook 38 f of a suspension belt 38 (described later) is hung is provided on the upper portion of the case 21 of the power supply device 20.

<About harness 30>
As shown in FIG. 1, the harness 30 is a backpack for carrying the power supply device 20, and includes a back plate 32 to which a case 21 of the power supply device 20 is fixed, left and right shoulder belts 34, a waist belt 36, Left and right suspension belts 38 are provided. The suspension belt 38 has an upper end fixed to the upper portion of the shoulder belt 34, and a hook 38 f connected to the lower end is hung on the receiving portion 21 u of the case 21 of the power supply device 20. That is, the case 21 of the power supply device 20 is suspended and supported from above by the suspension belt 38 provided on the upper portion of the shoulder belt 34.

<About the back plate 32 of the harness 30>
As shown in FIGS. 2 to 6, the back plate 32 of the harness 30 is a substantially square plate disposed on the back of the worker, and is formed in a shape substantially equal to the case front surface 21 f of the power supply device 20. Further, on the front side of the back plate 32, as shown in FIGS. 2 and 4, a main back pad 34b integrated with the left and right shoulder belts 34, and a lower back pad 36y integrated with the waist belt 36, Are connected. Further, as shown in FIG. 2, the back plate 32 is formed with elongated holes 40 through which the respective connecting pins 22 are inserted at positions corresponding to the connecting pins 22 provided on the case front surface 21f.

  As shown in FIG. 2, the long holes 40 of the back plate 32 are formed by equalizing six long holes 40, and each of the long holes 40 is arranged vertically. As shown in FIG. 3, a substantially circular insertion portion 43 into which the head portion 22 h of the connecting pin 22 of the case 21 can be inserted is formed at the upper end portion of the long hole 40. Further, a substantially semicircular fixing portion 45 into which the head portion 22h of the connecting pin 22 cannot be inserted and the shaft portion 22j can be inserted is formed at the lower end portion of the long hole 40. Furthermore, between the insertion portion 43 and the fixing portion 45 of the long hole 40 is an arcuate hole-shaped guide portion 47 that connects both the portions 43 and 45. As shown in FIG. 8, the guide portion 47 is configured to be able to guide the shaft portion 22 j of the connecting pin 22 in the radial direction, so that the width dimension of the guide portion 47 is slightly narrowed in the middle position of the guide portion 47. The convex portion 47t is formed. The width dimension of the guide part 47 narrowed by the convex part 47t is set to a value slightly smaller than the diameter dimension of the shaft part 22j of the connecting pin 22. Further, the width dimension of the guide part 47 at a position other than the convex part 47t is set to a value substantially equal to the diameter dimension of the shaft part 22j (a value through which the shaft part 22j can be inserted).

  With the above configuration, when the connecting pin 22 of the case 21 is inserted into the insertion portion 43 of the long hole 40 of the back plate 32, the head portion 22h of the connecting pin 22 protrudes to the front side of the back plate 32 and the shaft portion 22j is a long hole. 40. The shaft portion 22j of the connecting pin 22 can be moved downward along the guide portion 47. At this time, the head portion 22 h of the connecting pin 22 engages with the peripheral edge of the guide portion 47 of the elongated hole 40 from the front side of the back plate 32. In this state, when the shaft portion 22j of the connecting pin 22 reaches the position of the convex portion 47t of the elongated hole 40 (guide portion 47), the shaft portion 22j stops at this position. That is, the case 21 is temporarily fixed to the back plate 32. Further, when a force of a predetermined level or more is applied to the shaft portion 22j of the connecting pin 22 in this direction in a direction passing through the convex portion 47t of the elongated hole 40 (guide portion 47), the shaft portion 22j is moved to the elongated hole 40 (guide portion). 47), and moves downward to the position of the fixed portion 45. Here, the predetermined force is set to a value approximately equal to [weight of power supply device 20] / [number of connecting pins 22 (six)].

<About the attachment of the power supply device 20 (case 21) to the back plate 32 of the harness 30>
To attach the case 21 of the power supply device 20 to the back plate 32 of the harness 30, as shown in FIGS. 4 to 6, each connection provided on the case front surface 21 f with respect to each long hole 40 of the back plate 32. The pin 22 is aligned, and the connecting pin 22 is inserted into the insertion portion 43 of the elongated hole 40. Then, the case front surface 21f is brought into surface contact with the back plate 32 (see FIG. 4). In this state, the head 22 h of each connecting pin 22 protrudes to the front side of the back plate 32.

  Next, in a state where the back plate 32 of the harness 30 and the power supply device 20 are raised, the case 21 of the power supply device 20 is displaced downward with respect to the back plate 32 using the weight of the power supply device 20. As a result, the shaft portion 22j of the connecting pin 22 of the case 21 descends along the guide portion 47 of the long hole 40 of the back plate 32 as shown in FIG. At this time, the head portion 22h of the connecting pin 22 is engaged with the peripheral edge of the guide portion 47 from the front side of the back plate 32, so that the connection between the case 21 and the back plate 32 is ensured. When the shaft portion 22j of the connecting pin 22 of the case 21 reaches the position of the convex portion 47t formed in the elongated hole 40 (guide portion 47) of the back plate 32, the power supply device 20 (case 21) for the back plate 32 is obtained. ) Stops moving downward. That is, the power supply device 20 (case 21) is temporarily fixed to the back plate 32.

  In this state, as shown in FIG. 7, the hooks 38f of the left and right suspension belts 38 are respectively hooked on the left and right receiving portions 21u of the case 21, and the lengths of the left and right suspension belts 38 are adjusted so that the left and right suspension belts 38 are stretched. To do. Next, a predetermined force is applied downward to the case 21 so that the shaft portion 22j of the connecting pin 22 of the case 21 can pass through the convex portion 47t of the elongated hole 40 (guide portion 47) of the back plate 32. As a result, as shown in FIGS. 8 and 9, the shaft portion 22 j of the connecting pin 22 of the case 21 passes through the convex portion 47 t of the long hole 40 (guide portion 47) of the back plate 32, and the back plate 32. Case 21 moves downward. Then, in a state where the shaft portion 22j of the connecting pin 22 is engaged with the fixing portion 45 of the elongated hole 40, the downward movement of the case 21 with respect to the back plate 32 is stopped, and the power supply device 20 (case 21) with respect to the back plate 32 of the harness 30 is stopped. ) Installation is completed. In this manner, the case 21 is moved downward from the position where the lengths of the left and right suspension belts 38 are adjusted by the height dimension from the convex portion 47 t of the elongated hole 40 to the fixed portion 45 with respect to the back plate 32. It becomes possible. For this reason, tension is further applied to the left and right suspension belts 38, and the suspension belts 38 are difficult to loosen. That is, the convex portion 47t of the elongated hole 40 (guide portion 47) corresponds to the holding portion of the guide portion of the present invention.

<Advantages of Backpack Type Power Supply Device 10 According to the Present Embodiment>
According to the backpack type power supply device 10 according to the present embodiment, the head portion 22h of each connecting pin 22 of the power supply device 20 (case 21) is inserted into the insertion portion 43 of the corresponding slot 40 of the back plate 32, and the power supply device 20 is inserted. The (case 21) and the back plate 32 are moved relative to each other to move the shaft portion 22j of the connecting pin 22 to the fixing portion 45 via the guide portion 47 of the elongated hole 40. As a result, the head portion 22 h of the connecting pin 22 is hooked on the periphery of the elongated hole 40, and the power supply device 20 (case 21) is fixed to the back plate 32. For this reason, compared with the case where the power supply device 20 (case 21) is fixed to the backplate 32 with a some screw | thread etc., the fixation and removal of the power supply device 20 with respect to the backplate 32 become easy. The guide portion 47 of the elongated hole 40 of the back plate 32 is provided with a convex portion 47t (holding portion) that can receive the weight of the power supply device 20 through the shaft portion 22j of the connecting pin 22. For this reason, the power supply device 20 can be temporarily fixed to the back plate 32 in a state where the shaft portion 22j of the connecting pin 22 is located at the convex portion 47t (holding portion) of the elongated hole 40 (guide portion 47). In this state, if the upper portion of the power supply device 20 (case 21) is suspended and supported by the suspension belt 38 provided on the upper portion of the shoulder belt 34, thereafter, the shaft portion 22j of the connecting pin 22 of the power supply device 20 is attached to the back plate 32. The suspension belt 38 can be stretched without loosening by moving to the fixing portion 45 of the long hole 40.

  Further, since the guide portion 47 of the elongated hole 40 is formed in a substantially circular hole shape, even when the weight of the power supply device 20 is applied to the shaft portion 22j of the connecting pin 22, the shaft portion 22j of the connecting pin 22 is The guide portion 47 of the elongated hole 40 can be moved relatively slowly. Further, since the insertion hole 43 is formed at the upper end position and the fixing section 45 is formed at the lower end position in the long hole 40 of the back plate 32, the shaft portion of the connecting pin 22 is utilized by utilizing the weight of the power supply device 20. 22j is moved to the fixing part 45 of the long hole 40 of the back plate 32, and the shaft part 22j of the connecting pin 22 can be securely held by the fixing part 45 of the long hole 40.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the embodiment, as shown in FIG. 2 and the like, all the long holes 40 formed in the back plate 32 of the harness 30 are formed in the same shape, and the back plate 32 and the power supply device 20 (case 21) are vertically moved. An example in which the elongated hole 40 and the connecting pin 22 are engaged by moving the relative position to each other is shown. However, as shown in FIG. 10, after each connecting pin 22 is inserted into the insertion portion 43 of each elongated hole 40, the back plate 32 and the power supply device 20 (case 21) move around the rotation center C. It is also possible to set the shape of the guide portion (not shown in the figure) of each elongated hole 40 so that the connecting pin 22 and the elongated hole 40 (fixed portion 45) engage with each other by relative rotation. Further, as shown in FIGS. 12 and 13, all the long holes 40 are formed in the same arc shape, and the long holes 40 and the connecting pins are moved while the back plate 32 and the power supply device 20 (case 21) are moved relative to each other in the vertical and horizontal directions. It is also possible to have a configuration in which the motor 22 is engaged.

  Further, as shown at the left end, the center, and the right end in FIG. 14, the guide portion of the long hole 40 can be formed in a lateral T-shape or a bowl shape from the vertical guide portion 47 s and the horizontal guide portion 47 y. Thereby, the weight of the power supply device 20 can be received through the shaft portion 22j of the connecting pin 22 at the position of the lateral guide portion 47y. That is, the lateral guide portion 47y of the guide portion functions as a holding portion for the guide portion.

  Further, as shown in the second from the left and the second from the right in FIG. 14, the guide portion of the long hole 40 is formed only from the vertical guide portion 47 s, and the middle position of the vertical guide portion 47 s or the boundary with the insertion portion 43. It is also possible to form a convex portion 47t that narrows the width dimension of the vertical guide portion 47s at the position. Thereby, the weight of the power supply device 20 can be received through the shaft portion 22j of the connecting pin 22 at the position of the convex portion 47t. That is, the convex portion 47t of the vertical guide portion 47s works as a holding portion for the guide portion.

<Others>
As shown in FIGS. 15 and 16, harness-side hooks 65 and 66 of the belt 60 that suspends and supports the brush cutter 50 are hung on the chest portion of the right end central portion of the back plate 32 of the harness 30 and the right shoulder strap 34. Hook receiving portions 32w and 34w are provided. The belt 60 of the brush cutter 50 is a belt that suspends and supports the brush cutter 50 in a V shape as shown in FIG. As shown in FIG. 15, the belt 60 includes a belt main body 61 whose length can be adjusted, and harness-side hooks 65 and 66 provided at both ends of the belt main body 61 in the longitudinal direction. The belt body 61 is passed through one end side of the connector 62.

  The connector 62 is configured so that one end side and the other end side can be connected to each other and the connection can be released. A brush cutter side hook 63 is provided on the other end side of the connector 62. Therefore, as shown in FIG. 16, with the connector 62 of the belt 60 connected, the brush cutter side hook 63 is hung on the retaining ring 55 of the brush cutter 50, and the harness side hooks 65 and 66 are respectively hook receiving portions of the harness 30. By hanging on 32w, 34w, the brush cutter 50 can be suspended and supported on the right side of the harness 30. Thus, since the brush cutter 50 can be suspended and supported on the right side of the harness 30, the harness 30 (the back-type power supply device 10) can be removed from the body while the harness 30 and the brush cutter 50 are connected by the belt 60. Become. It is also possible to provide hook receiving portions 32 w and 34 w at the left end center portion of the back plate 32 of the harness 30 and the left shoulder belt 34.

  Here, in the present embodiment, the connection pin 22 is provided on the case front surface 21f of the power supply device 20 and the long hole 40 is provided on the back plate 32 of the harness 30, but the long hole 40 is provided on the case front surface 21f. It is also possible to provide the connecting pin 22 on the back plate 32 of the harness 30. In the present embodiment, the brush cutter 50 is exemplified as the electric working machine. Electric tools such as an electric marnoco, electric drill, and electric screwdriver are also included.

10 .... Back-type power supply device 20 .... Power supply device 21 ... Case 21f ... Front of case (front side of power supply device)
22 ... Connection pin 22j ... Shaft 22h ... Head 30 ... Harness 32 ... Back plate 32w ... Hook receiving part 34w ... Hook receiving part 34 ... · Shoulder belt 40 ··· long hole 43 ··· insertion portion 45 ··· fixed portion 47 ··· guide portion 47t ··· convex portion (holding portion)
47y ... Lateral guide part (holding part)
47s ... Vertical guide 50 ... Brush cutter (electric working machine)
60 ... Belt

Claims (7)

A back load type power supply device comprising a power supply device for supplying electric power to an electric working machine, and a harness used to carry the power supply device on its back,
The harness includes a back plate disposed on the back of the operator, and a shoulder belt that holds the back plate on the back of the operator,
On either one of the back plate of the harness and the front surface of the power supply device matched to the back plate, a shaft portion and a head having a larger diameter than the shaft portion are formed at the tip of the shaft portion. A plurality of connecting pins provided are provided in a protruding state,
In either one of the back plate of the harness and the front surface of the power supply device, a plurality of elongated holes through which the connection pins are passed are formed at positions corresponding to the connection pins.
The elongated hole is formed at one end of the elongated hole so that the head of the connecting pin can be inserted therethrough, and the elongated hole is formed at the other end of the elongated hole so that the head of the connecting pin is inserted. A fixing portion that is impossible to insert, and a guide portion that connects the insertion portion and the fixing portion, the head portion of the connecting pin cannot be inserted, and can guide the shaft portion in the radial direction. And the guide portion is provided with a holding portion configured to receive the weight of the power supply device via the shaft portion of the connecting pin. A backpack type power supply device according to claim 1,
The holding portion provided in the guide portion of the elongated hole is a convex portion configured to narrow the width dimension of the guide portion, and the shaft portion of the connection pin passes through the convex portion of the guide portion. A back-type power supply device configured to allow the shaft portion of the connecting pin to pass through the convex portion when receiving a force exceeding a predetermined level. A backpack type power supply device according to claim 2,
A back-type power supply device in which the guide portion of the elongated hole is formed in a substantially arc shape. A backpack type power supply device according to claim 1,
The elongated hole guide portion includes a longitudinal guide portion extending in the longitudinal direction and a lateral guide portion extending in the lateral direction, and the lateral guide portion functions as the holding portion. A back-type power supply device according to any one of claims 1 to 4,
A connecting pin is provided on the front surface of the power supply device, and a long hole is provided on the back plate of the harness,
The back-type power supply device in which the insertion portion is formed at the upper end position and the fixing portion is formed at the lower end position of the elongated hole. A back-type power supply device according to claim 1 or 2,
The back plate and the power supply device are connected by rotating the back plate and the power supply device in a state where the heads of the connection pins are inserted through the insertion portions of the long holes. A back-type power supply device in which each slot is provided. A back-type power supply device according to any one of claims 1 to 6,
A hook receiving portion on which a hook of a belt that suspends and supports the electric working machine is provided on a right end portion and a right shoulder belt of the back plate of the harness, or on a left end portion and a left shoulder belt of the back plate. A back-loaded power supply.

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