JP4416582B2 - Back spraying device - Google Patents

Description

  The present invention relates to a backpack-type spraying device that is used while being carried by a worker and sprays a stored medicine.

  Such a back-type spraying device is used so that an operator carries out the spraying work while walking around the object to be sprayed while carrying the spraying device, so that the power source for driving the spraying device moves the operator. A battery that can be stored in a device for convenience is used. Since such a battery discharges, a battery housing structure that can replace the battery has been proposed (see Patent Documents 1 and 2).

  The storage structure described in Patent Literature 1 includes a battery case provided on a side portion of the sprayer main body and a battery case lid that covers an opening of the battery case. The battery case has a bottomed container shape with an opening formed on the side. A hole is formed in the bottom surface of the battery case, and a cable extending from the inside of the hole extends into the battery case through the hole. A cable-side connector that can be connected to a battery-side connector provided on the battery is provided at the tip of the cable. The battery is housed by being inserted into the battery case in a state where the battery side connector and the cable side connector are connected, and the battery case lid is closed. However, since the storage structure described in Patent Document 1 is troublesome to attach and detach the connectors, a storage structure as described in Patent Document 2 has been proposed.

  The storage structure described in Patent Document 2 includes a storage hole provided in a side portion of the sprayer main body. The accommodation hole is open at one end and extends in a rectangular shape, and the main body side electrodes extend in the front-rear direction on both upper and lower surfaces of the accommodation hole and are exposed in the accommodation hole. The battery inserted into the accommodation hole has a plurality of batteries and a battery holding part that holds the batteries. The battery holding portion is box-shaped, and battery-side electrodes that are electrically connected to the battery and can be joined to the body-side electrode are provided on both the upper and lower surfaces. The battery side electrode is formed by bending an elastically deformable plate-like member into a convex shape. A handle for the operator to hold the battery holding part is provided at one end of the battery holding part, and the battery holding part is inserted into the receiving hole while holding the handle. When the battery holding portion is inserted into the accommodation hole portion, the battery side electrode is pressed into contact with the main body side electrode in an elastically deformed state, and these electrodes are electrically connected.

Japanese Utility Model Publication No. 6-32825 No. 7-19265

  However, in the storage structure described in Patent Document 2, the battery holding portion is locked to the storage hole only by the urging force due to the elastic deformation by the battery-side electrode, and the battery is attached and detached repeatedly. In this case, the battery-side electrode is fatigued to cause elastic deterioration. As a result, there is a risk that the battery will be pulled out of the receiving hole during the work, and when the battery is pulled out, there is a possibility that the power supply to the power unit is cut off and the spraying work is interrupted.

  Moreover, when the handle provided in the battery is damaged, it becomes difficult to remove the battery from the accommodation hole. Therefore, a part of the battery holding part may be protruded from the sprayer main body with the battery inserted in the accommodation hole, but if this is done, there is another object on the protruding part of the battery holding part. Problems such as being caught occur. For this reason, the battery needs to be completely accommodated in the accommodation hole.

  The spray device described in Patent Document 2 is configured such that when the battery is inserted into the housing hole, the power unit is driven, while the throttle opening of the power unit is adjusted by the throttle lever, and the adjustment lever is used. The shutter is configured to adjust the opening degree of the shutter that controls the amount of spatter that flows out of the tank. These levers are arranged near the left waist of the operator with the operator carrying the spray device. For this reason, if the lever is moved up and down with the left hand while the operator's left hand is moved to the vicinity of the left waist, the left arm is burdened and this up / down operation is troublesome. In particular, it is difficult for an operator with low body flexibility, such as an elderly person, to operate these levers while carrying the spraying device on the back, and with the recent aging of agricultural workers, the spraying device has good operability. The provision of

  The present invention has been made in view of such problems, and provides a back-type spray device that ensures battery retention regardless of aging, facilitates battery removal and removal, and has excellent operability such as levers. The purpose is to do.

In order to solve such a problem, the present invention is a backpack-type spraying device that is used on the back of an operator and sprays a medicine accommodated in the sprayer body, and includes a side surface portion (for example, a sprayer body) a housing hole that is open to the left side surface 10a) in the embodiment, is removably inserted inserted into the accommodation hole, the power supply and the ing battery for driving knapsack spray device is inserted into the accommodation hole The battery has a lock mechanism that locks the battery in the receiving hole, a body-side electrode provided in the receiving hole, and a battery-side electrode provided in the battery. And an insertion / extraction portion that protrudes from a side surface portion on one end side of the handle portion and has a smaller cross-sectional area than the handle portion, the receiving hole portion includes an insertion hole portion for inserting and inserting the insertion / extraction portion, and the insertion portion Connected to the other end of the hole and the operator holding the handle, The battery side electrode is provided in the insertion / extraction part, the body side electrode is provided in the insertion hole part, and the battery is inserted into the insertion hole part so that the battery When the side surface portion on one end abuts on the step formed between the insertion hole portion and the insertion hole portion, the battery side electrode and the body side electrode are joined and locked to the accommodation hole portion by the lock mechanism portion. It is characterized by that.

According to the present invention, when a battery serving as a power source for driving the backpack spraying device is inserted into the housing hole, the battery side electrode is joined to the main body side electrode, and the battery is accommodated in the housing hole by the lock mechanism. Locked to the part. For this reason, since the battery is reliably locked in the accommodation hole by the lock mechanism, the battery is reliably locked in the accommodation hole unless the lock mechanism is damaged. For this reason, it is possible to prevent a situation in which the battery is pulled out of the accommodation hole during the spraying operation and the power supply to the power unit is interrupted. Further, according to the present invention, when the insertion / extraction portion is inserted into the insertion hole portion, and the side surface portion on one end side of the handle portion comes into contact with the step portion formed between the insertion hole portion and the insertion / extraction hole portion. By joining the battery side electrode and the main body side electrode, the operator recognizes that the battery has been securely inserted into the receiving hole, and ensures the electrical connection between the battery side electrode and the main body side electrode. Can be recognized. For this reason, workability | operativity of insertion work can be improved. Further, since the handle portion is formed so that the operator can handle it, the attachment / detachment operation of the battery in the accommodation hole portion can be facilitated, and the detached battery can be easily carried.

Further, according to the present invention, the lock mechanism portion can be engaged with the engagement recess provided in one of the handle portion and the insertion / extraction hole portion and the engagement recess provided in either the handle portion or the insertion / extraction hole portion. The locking mechanism portion having the engaging protrusion and the engaging recess and the locking protrusion is arranged so as to face each other vertically, and the engaging recess or the locking protrusion provided on the handle portion. When the pressing operation is performed, the locked state with the locking projection or the engagement recess provided in the insertion / extraction hole is released .

According to the present invention, the locking mechanism portion is vertically arranged oppositely, and when the engaging recess or the locking projection provided in the handle portion is pressed, the locking projection or the locking projection provided in the insertion / extraction hole portion or Since the engagement with the engaging recess is released, the battery cannot be removed without pressing the two locking mechanisms simultaneously, so the battery is not easily removed. The insertion state can be reliably maintained. Also, immediately after the battery is removed, the battery is in the worker's palm, so that the battery can be removed and removed from the operator's hand. Is suppressed, and damage to the battery can be prevented .

Furthermore, the present invention is characterized in that a lid portion that closes the opening in a state where the battery is inserted into the housing hole is provided in the opening of the housing hole that opens in the side surface of the sprayer main body .

According to the present invention, by providing the lid portion at the opening of the accommodation hole , the battery can be protected from external dust, water, etc., and the battery is particularly protected from the chemical sprayed during the spraying operation. be able to. As a result, it is possible to prevent failure of the electrical system that leads to the electrodes provided in the accommodation hole, the electrical components provided around the accommodation hole, and the like .

Further, according to the present invention, the storage hole is provided on the side surface of the worker left hand side of the sprayer main body carried by the operator, and when the sprayer main body is carried by the operator around the storage hole. A drive switch is provided in the sprayer body near the left waist of the worker .

According to the present invention, the drive switch is provided on the sprayer main body near the left waist of the worker when the sprayer main body is carried by the worker, so that the operator can keep the jet tube in the right hand and the drive switch. The battery can be easily attached and detached and the operation of the drive switch can be confirmed .

In the present invention, the drive switch includes a switch unit that can tilt in the front-rear direction when the sprayer body is carried by the operator, and the switch unit is tilted to either one of the front-rear direction. Electric power is supplied to the power unit that sprays the medicine, and the power supply to the power unit is cut off when the power unit is tilted to the other side in the front-rear direction .

According to this invention, the switch part can be tilted in the front-rear direction, and when the switch part is tilted to one side in the front-rear direction, power is supplied to the power part, and either side in the front-rear direction When it is tilted, the power supply to the power unit is cut off, so that the operator carries the spray device and moves the left wrist in the front-rear direction with the left hand of the worker moved around the left waist. The switch part can be operated with. For this reason, the operativity of a drive switch can be improved .

Furthermore, the present invention is characterized in that a protective member protruding outward is provided on the sprayer body below the drive switch .

According to this invention, by providing a protective member protruding outward on the sprayer main body below the drive switch, the sprayer main body is placed on the ground where protrusions such as pebbles are present, or while the spraying device is being transported Even when the sprayer body falls down, it is possible to prevent a situation in which a projection comes into contact with the drive switch or hits another object, and the drive switch can be protected .

Further, the present invention is characterized in that the battery is used for an electric tool .

According to this invention, by using a battery for an electric tool, it is possible to use a battery that can be used in an apparatus other than a backpack type spraying apparatus, and the manufacturing cost of the entire backpack type spraying apparatus including the battery Can be made cheaper .

Further, the present invention is a backpack-type spraying device which is used while being carried on the back of an operator and sprays a medicine accommodated in a sprayer body, and includes a housing hole portion opened in a side surface portion of the sprayer body, and the housing hole. part removably inserted is inserted into a power source and ing battery for driving knapsack spray device, and a locking mechanism for locking the inserted and attached in the accommodation hole portion battery accommodation hole, the accommodation hole A main body side electrode provided, and a battery side electrode provided on the battery. The battery is used for an electric tool, and when the battery is inserted into the accommodation hole, the battery side electrode It joins with a main body side electrode, and is locked to an accommodation hole part by the locking mechanism part.

According to the present invention, when a battery serving as a power source for driving the backpack spraying device is inserted into the housing hole, the battery side electrode is joined to the main body side electrode, and the battery is accommodated in the housing hole by the lock mechanism. Locked to the part. For this reason, since the battery is reliably locked in the accommodation hole by the lock mechanism, the battery is reliably locked in the accommodation hole unless the lock mechanism is damaged. For this reason, it is possible to prevent a situation in which the battery is pulled out of the accommodation hole during the spraying operation and the power supply to the power unit is interrupted. In addition, by using the battery for an electric tool, a battery that can be used in a device other than a back spray device can be used, and the manufacturing cost of the entire back spray device including the battery can be reduced. Can do.

  According to the backside spray device according to the present invention, the lock mechanism portion that locks the battery inserted into the accommodation hole portion into the accommodation hole portion is provided, the lock mechanism portion is disposed vertically opposite, and the switch portion of the drive switch is provided. By enabling the sprayer body to tilt in the front-rear direction when it is carried by the operator, the battery can be held securely regardless of changes over time, and the battery can be removed and removed with good operability. A back spray device can be provided.

  Hereinafter, a preferred embodiment of a backpack type spraying apparatus according to the present invention will be described with reference to FIGS. The backside spray device of this embodiment will be described by taking a backside spray device that sprays liquid as an example. For convenience of explanation, the directions of arrows shown in FIG. 1 (perspective view) will be described below as the front-rear direction and the left-right direction.

  As shown in FIG. 1 and FIG. 2 (perspective view), the back-type spraying device 1 (hereinafter referred to as “spraying device 1”) has a bottomed container-like sprayer main body 10 and a rod-like spray connected to this. It has a tube 60 and a battery 70 inserted into the sprayer main body 10. The spray device 1 is used in such a manner that an operator (not shown) carries the sprayer body 10 on the back and holds the jet tube 60 in the right hand to perform the spraying operation.

  First, the battery 70 inserted into the spray device 1 will be described. As shown in FIG. 3 (perspective view), the battery 70 has a handle portion 71 that can be grasped by an operator, and protrudes from a side surface portion 71 a on one end side of the handle portion 71 and has a smaller cross-sectional area than the handle portion 71. And the inserted / extracted portion 73. As shown in FIG. 4C (front view), the handle portion 71 has a substantially rectangular parallelepiped shape, and has a front and rear non-target shape in which the front side protrudes in a convex shape. The cross-sectional shape of the insertion / extraction part 73 is formed in a long hole extending in the front-rear direction. The position of the center P of the insertion / extraction part 73 is arranged at a position shifted forward from the center Q of the handle part. Battery side electrodes 74 and 75 are respectively attached to the upper and lower surfaces on the distal end side of the insertion / extraction part 73. These battery-side electrodes 74 and 75 are electrically connected to a battery (not shown) housed in at least one of the handle portion 71 and the insertion / extraction portion 73, and the electrode on one side is a + electrode, The other electrode functions as a negative electrode.

  As described above, the grip portion 71 of the battery 70 is formed in a size that allows the operator to grip, so that the battery 70 can be easily attached to and detached from the sprayer main body 10 shown in FIG. The battery 70 can be easily carried. In addition, since the handle portion 71 has a front-rear non-target shape, it is possible to change the orientation of the battery 70 by simply changing the orientation of the battery 70 so that the convex side is the front side. Can be improved.

  On the upper surface portion 71 b and the lower surface portion 71 c of the handle portion 71, a locking projection portion 81 that constitutes a part of the lock mechanism portion 80 is provided. The locking mechanism portion 80 includes the locking projection 81 and an engagement recess 87 that is provided in the receiving hole 11 of the sprayer main body 10 shown in FIG. 3 to be described later and locks the locking projection 81. As shown in FIG. 4A (plan view), the locking projection 81 is formed to protrude outward from the front end portion of the pressing plate portion 82 supported so as to be elastically deformable in the vertical direction. Yes. The locking protrusion 81 moves so as to approach the insertion / extraction part 73 side when the pressing plate part 82 is pressed, and moves away from the insertion / extraction part 73 when the pressing operation of the pressing plate part 82 is released. To return to the original position. These locking projections 81 are arranged so as to face each other.

  As shown in FIG. 1, the sprayer main body 10 to which the battery 70 configured as described above is attached has a backrest 50 at the front lower portion thereof, and a pair of backside negative bands 52 extending in the vertical direction are attached to the front side. Is configured. The operator carries the sprayer main body 10 with his / her back on the backrest 50 so as to hang the pair of backside negative bands 52 on the corresponding shoulders.

  A chemical tank 54 with a bottomed container is built in the upper part of the sprayer main body 10, and a chemical liquid is injected from an injection port opened at the top of the chemical liquid tank 54, and a cap 55 is detachably attached to the injection port. Yes. A chemical | medical solution is the aqueous solution which melt | dissolved the chemical | medical agent for control which controls a pest, a weed, etc., for example. A pump and a motor (not shown) are housed in the lower part of the sprayer main body 10, and the pump operates to suck the chemical liquid, increase the pressure to a constant pressure, and discharge the liquid to the injection tube 60. The pump is driven to rotate by receiving the supply.

  In the lower portion of the left side surface portion 10a of the sprayer main body 10, the above-described accommodation hole portion 11 that opens to the left side surface portion 10a and can accommodate the battery is provided. As shown in FIG. 3, the housing hole 11 is opened in a substantially rectangular shape and extends to the inside of the sprayer main body 10. The housing hole 11 is connected to the tip of the insertion / removal hole 12 and is connected to the inside of the sprayer main body 10. And an insertion hole 14 extending in the direction. The insertion / extraction hole 12 has a size that allows the operator to insert / extract the battery 70 while holding the handle 71 of the battery 70. The cross-sectional shape of the insertion / extraction hole 12 is not limited to a rectangular shape, and may be a circular shape or a polygonal shape. The insertion hole portion 14 is formed in a long hole shape whose cross-sectional shape extends in the front-rear direction, and is similar to the cross-sectional shape of the insertion / extraction portion 73, and the insertion / extraction portion 73 can be inserted therein. Further, the insertion hole portion 14 has a cross-sectional area smaller than the cross-sectional area of the insertion / extraction hole portion 12. For this reason, a step 16 is formed between the insertion hole 14 and the insertion hole 12. The step portion 16 is formed in an annular shape in a side view. The center of the insertion hole portion 14 is shifted to the front side of that of the insertion hole portion 12. This is because the battery 70 can be inserted only when the two battery side electrodes 74 and 75 provided in the battery 73 are oriented in the correct direction. As shown in FIG. 4B (side view), body side electrodes 18 are respectively attached to the upper surface and the lower surface on the distal end side of the insertion hole portion 14. These body side electrodes 18 are electrically connected to a motor.

  When the insertion / extraction portion 73 of the battery 70 is inserted into the insertion hole portion 14 and the side surface portion 71a on the insertion / extraction portion side of the grip portion 71 comes into contact with the stepped portion 16, the main body side electrode 18 has a corresponding battery side electrode 74, 75. It is arranged to be joined. Therefore, the operator can surely recognize that the main body side electrode 18 and the battery side electrodes 74 and 75 are in the joined state by confirming that the gripping portion 71 is in contact with the stepped portion 16. .

  As shown in FIG. 3 again, on the upper surface portion and the lower surface portion of the step portion 16, an engagement concave portion 87 constituting another part of the lock mechanism portion 80 is provided. The engaging recess 87 is disposed so as to open to the center side of the stepped portion 16 and is disposed so as to face each other. The engaging recess 87 is disposed at a position where the corresponding locking protrusion 81 is locked when the battery 70 is inserted into the receiving hole 11. Therefore, a locking mechanism portion 80 including a locking projection portion 81 disposed on the upper side of the battery 70 and an engagement recess portion 87 disposed on the upper side of the step portion 16, and a locking projection disposed on the lower side of the battery 70. The battery 70 cannot be removed unless the two lock mechanism portions 80 and 80 including the lock mechanism portion 80 including the engaging recess 87 disposed below the portion 81 and the step portion 16 are pressed simultaneously. become. As a result, the battery 70 is not easily detached, and the battery 70 can be reliably held. Further, immediately after the battery 70 is removed, the battery 70 is gripped on both the upper and lower surfaces of the battery by the operator's hand, that is, the battery 70 is placed in the operator's palm. As a result, the situation where the battery 70 is dropped from the operator's hand can be suppressed, and the battery can be prevented from being damaged. The battery 70 may be one used for an electric tool or the like. Thus, by making the battery 70 used as an electric tool or the like available as it is, the manufacturing cost of the entire backpack type spraying device including the battery 70 can be reduced.

  The opening portion 11a of the accommodation hole portion 11 is provided with a lid portion 20 that is hinged at the rear end side and is swingable in the front-rear direction, and closes the opening portion 11a. A lock portion 21 is provided at the distal end portion of the lid body portion 20, and when the lid body portion 20 closes the opening 11 a, the lid body portion 20 is locked by the lock portion 21. Since the lock unit 21 has the same configuration as the lock mechanism unit 80 described above, description thereof is omitted. By providing the lid portion 20 in the opening 11a of the accommodation hole portion 11 in this way, the battery 70 can be protected from external dust, water, etc., and the battery 70 is particularly protected from the chemical solution sprayed during the spraying operation. Can be protected. In addition, it is possible to prevent failure of electric parts such as electrodes provided in the housing hole 11 and drive switches described later provided around the housing hole.

  A drive switch 30 is provided at the edge of the front lower portion of the opening 11 a of the accommodation hole 11. The drive switch 30 is disposed so as to be positioned near the left waist of the operator when the sprayer body 10 is carried by the operator. The drive switch 30 is a so-called toggle switch, and includes a switch portion 31 that can tilt in the front-rear direction. The switch unit 31 is configured to supply power to the motor when tilted to the front side in the front-rear direction, and to cut off power supply to the motor when tilted to the rear side in the front-rear direction. For this reason, it becomes possible for the operator to operate the switch unit 31 only by moving the left wrist in the front-rear direction while carrying the sprayer main body 10 and moving the operator's left hand around the left waist. The operability of 30 can be improved. Further, since the drive switch 30 is disposed in the vicinity of the accommodation hole portion 11, maintenance of the drive switch 30 can be performed at the same time as maintenance of the accommodation hole portion 11, thereby improving workability of maintenance work. it can. The relationship between the tilt direction of the switch unit 31 and the power supply is not limited to the above-described content. When the switch unit 31 is tilted to the rear side, electric power is supplied to the motor, and when the switch unit 31 is tilted to the front side. The power supply to the motor may be cut off.

  A protective member 35 that protrudes outward and extends in the front-rear direction is provided at a position near the lower side of the drive switch 30. The protection member 35 has a protruding length that is approximately the same as the protruding length of the switch portion 31 or larger than that of the switch portion 31. For this reason, even when the sprayer main body 10 is placed on the ground where protrusions such as pebbles are present, or when the sprayer main body 10 falls while the spraying device 1 is being transported, the protrusions may come into contact with the drive switch 31. No other object hits, and damage to the drive switch 31 can be prevented beforehand.

The perspective view of the backpack type spraying device concerning one embodiment of the present invention is shown. The perspective view of the sprayer main body with which the battery was mounted | worn is shown. The perspective view of the sprayer main body with no battery attached is shown. FIG. 2A is a plan view of the battery, FIG. 2B is a side view of the battery, and FIG. 2C is a front view of the battery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Back type spraying apparatus 10 Sprayer main body 10a Left side part (side part)
DESCRIPTION OF SYMBOLS 11 Accommodating hole part 11a Opening part 12 Insertion / extraction hole part 14 Insertion hole part 16 Step part 18 Main body side electrode 20 Lid body part 30 Drive switch 31 Switch part 35 Protection member 70 Battery 71 Handle part 73 Insertion / extraction part 74, 75 Battery side electrode 80 Locking mechanism 81 Locking protrusion 87 Engaging recess

Claims (8)

It is a backpack type spraying device that sprays the medicine contained in the sprayer body, carried on the back of the operator,
A receiving hole opened in the side surface of the sprayer body; and
Is removably inserted inserted into the accommodation hole, the power supply and the ing battery for driving the backpack spraying device,
A locking mechanism for locking the battery inserted into the receiving hole to the receiving hole;
A body-side electrode provided in the accommodation hole;
A battery side electrode provided on the battery,
The battery has a handle portion that can be gripped by the operator, and an insertion / extraction portion that protrudes from a side surface portion on one end side of the handle portion and has a smaller cross-sectional area than the handle portion,
The accommodation hole is connected to an insertion hole for inserting and inserting the insertion / extraction part, and an insertion / extraction operation of the handle part while the operator holds the handle part while being connected to the other end of the insertion hole part. With an insertion hole that can be
The battery side electrode is provided in the insertion / extraction part, the body side electrode is provided in the insertion hole part,
In the battery, when the insertion / extraction portion is inserted into the insertion hole portion, a side surface portion on one end side of the handle portion abuts on a step portion formed between the insertion hole portion and the insertion / extraction hole portion. The battery-side electrode and the main body-side electrode are joined together and locked to the receiving hole by the locking mechanism portion. The locking mechanism portion is provided in one of the handle portion and the insertion / extraction hole portion and the other portion of the handle portion and the insertion / extraction hole portion and is locked to the engagement recess portion. With a locking projection possible,
The locking mechanism portion having the engaging recess and the locking projection is arranged to face up and down,
When the engaging recess or the locking protrusion provided in the handle is pressed, the locking state with the locking protrusion or the engaging recess provided in the insertion / extraction hole is released. The back-type spraying device according to claim 1 , wherein The lid part which closes the opening part in the state where the battery was inserted in the accommodation hole part was provided in the opening part of the accommodation hole part which opens to the side part of the sprayer main body, Item 3. A back-spraying spray device according to item 1 or 2 . The accommodation hole is provided on the side of the worker left hand side of the sprayer body carried by the worker,
Claims 1 to 3, characterized in that a drive switch on the sprayer body near the left lumbar of the operator when the sprayer body a periphery of the accommodation hole is piggybacked to the operator The backpack type spraying device according to any one of the above. The drive switch includes a switch portion that can tilt in the front-rear direction when the sprayer body is carried by an operator.
When the switch part is tilted to one side in the front-rear direction, power is supplied to the power part spraying the medicine, and when tilted to the other side in the front-rear direction, the switch part The back spray type spray device according to claim 4 , wherein power supply is cut off. The back spray type spray device according to claim 5 , wherein a protective member protruding outward is provided on the sprayer main body below the drive switch. The backpack type spray device according to any one of claims 1 to 6 , wherein the battery is used for an electric tool. It is a backpack type spraying device that sprays the medicine contained in the sprayer body, which is used on the back of the operator,
A receiving hole opened in the side surface of the sprayer body; and
Is removably inserted inserted into the accommodation hole, the power supply and the ing battery for driving the backpack spraying device,
A locking mechanism for locking the battery inserted into the receiving hole to the receiving hole;
A body-side electrode provided in the accommodation hole;
A battery side electrode provided on the battery,
The battery is used for an electric tool, and when the battery is inserted into the accommodation hole, the battery side electrode is joined to the body side electrode, and the accommodation hole is formed by the lock mechanism. Back spray type spray device characterized by being locked to

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