Rechargeable shear

A rechargeable shear (1) includes: a motor (5) having a rotor (21) that is rotatable relative to a stator (20); a motor housing (4), which houses the motor (5); a grip housing (8) connected to the motor housing (4); a battery-holding housing (9) connected to the grip housing (8); and a shear part (3) disposed forward of the rotor 21 and operably driven by the rotor (21). The motor (5) may be brushless. The shear part (3) may be rotatable relative to the motor housing (4) using a manipulatable ring (85) and a detent system (89, 92-94). A light (48) for illuminating the shear part (3) and a workpiece being cut thereby may be provided on the grip housing (8) or the battery-holding housing (9).

The present application claims priority to Japanese patent application serial number 2018-206793 filed on Nov. 1, 2018, the contents of which are incorporated fully herein by reference.

TECHNICAL FIELD

The present invention generally relates to a rechargeable (cordless) shear that is used to cut a workpiece such as an air-conditioning duct, a roofing material, a cement board, or the like.

BACKGROUND ART

Known electrically-powered shears include a shear part/head (cutting head assembly) that is provided at the tip of a housing and is driven by an electric motor. Such electrically-powered shears can be used to cut materials such as an air-conditioning duct, a roofing material (shingle), a cement board, or the like.

For example, the present Applicant (Makita Corporation) has sold electrically-powered shears under product numbers JS8000 and DJS130 (XSJ01Z). JS8000 is a corded (AC-driven) shear, whereas DJS130 (XSJ01Z) is a cordless shear driven by a rechargeable battery pack. Both JS8000 and DJS130 (XSJ01Z) have brushed motors. DJS130 (XSJ01Z) has a 360 degree swivel shear head.

SUMMARY OF THE INVENTION

It is one non-limiting object of the present teachings to provide a rechargeable shear having improved ergonomics and/or a higher power output.

In one aspect of the present teachings, a rechargeable (cordless) shear preferably comprises: a brushless motor having a stator and a rotor, which is rotatable relative to the stator; a motor housing, which houses the brushless motor; a grip housing, which is connected to the motor housing; a battery-holding housing, which is connected to the grip housing; and a shear part, which is disposed forward of the rotor and performs a shearing operation by being driven by the rotor.

In another aspect of the present teachings, a rechargeable (cordless) shear preferably comprises: a housing; a motor having a stator and a rotor, which is rotatable relative to the stator; and a shear part, which is disposed forward of the rotor and performs a shearing operation by being driven by the rotor. The housing comprises a motor housing, which houses the motor, a grip housing, which is connected to the motor housing, and a battery-holding housing, which is connected to the grip housing. A light for illuminating the shear part is provided on the housing.

The grip housing optionally may have a loop shape that extends in the up-down direction and a lower end of which is located downward of the motor housing. In such an embodiment, the light may be provided on an upper surface of the grip housing.

In the alternative, the battery-holding housing may be provided on a lower end of the grip housing and the light may be provided on an upper surface of the battery-holding housing.

In any of the above-mentioned embodiments, the shear part may be rotatable about a front-rear extending axis relative to the housing and may be provided such that it is capable of being fixed at an arbitrary rotational position relative to the housing, more particularly at a plurality of different rotational positions (corresponding to engaging recesses formed in a manually-rotatable ring) relative to the housing.

Additional objects, aspects, embodiments and advantages of the present disclosure will become apparent upon reading the following detailed description in view of the appended drawings and claims.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the present disclosure will be explained below, with reference to the drawings.

First Embodiment

FIGS. 1 and 2are oblique views that show one representative, non-limiting example of a rechargeable shear1according to the present teachings;FIG. 3is a side view, viewed from the right;FIG. 4is a center longitudinal-cross-sectional view; andFIG. 5is a cross-sectional view taken along line A-A inFIG. 4.

Referring first toFIGS. 1-3, the rechargeable (cordless) shear1of the first embodiment comprises a shear part3, which is configured to perform a shearing (cutting) operation and is located at a front end of a housing2. The shear part3also may be referred to, in an interchangeable manner, as a shear head, a cutting head assembly or scissors. The housing2generally extends in a front-rear direction of the shear1. The housing2comprises: a motor housing4, which houses a brushless motor5; a gear housing6, which is connected to the front of the motor housing4and houses a speed-reducing part7; a grip housing8, which is connected in a loop shape (a D shape) to the rear of the motor housing4and whose lower end protrudes downward of the motor housing4; and a battery-holding housing (battery mount part)9, which is connected to a lower end of the grip housing8. A battery pack10is mounted, by sliding from the front, on the battery-holding housing9. The battery pack10can be removed by pressing in a button10a.

The motor housing4, the grip housing8, and the battery-holding housing9are formed integrally with a main body housing11. More specifically, a pair of (left and right) half housings11a,11bare assembled (joined) by screws12that extend in the left-right direction. The gear housing6comprises an inner housing13(seeFIGS. 4-6), which is housed in a front-end inner part of the main body housing11, and an outer housing14, which is exposed forward of the main body housing11. The gear housing6is assembled onto (joined to) the main body housing11by: securing a rear flange15, which is formed on a front outer circumference of the inner housing13, to a front end of the main body housing11; from the front thereof, overlaying a front flange16, which is formed on a rear end of the outer housing14; and screwing screws17, which are inserted through both of the flanges15,16from the front, into respective screw bosses18, which are provided on an inner circumference of the main body housing11. Ridges19are formed on both the front and rear sides on the left and right side surfaces of the motor housing4and are oriented in an up-down direction. These ridges19protect the motor housing4when the shear1is placed (laid) on its side, such as when it is placed (laid) on the ground.

Referring now toFIGS. 4-6, the brushless motor5is an inner-rotor type that comprises a stator20and a rotor21. The motor5is housed inside the motor housing4and is oriented such that a rotary shaft22, which is provided in the rotor21, extends in the front-rear direction.

The stator20comprises: a stator core23, which is composed of a plurality of layers of steel plates; a front-insulating member24and a rear-insulating member25, which are respectively provided on the front and rear of the stator core23; and coils26, which are wound through the front-insulating member24and the rear-insulating member25and around the stator core23. The stator20is retained by a not-shown retaining part, which is provided on inner surfaces of the half housings11a,11b, on inner sides of ribs27,27, which have a quadrangular shape in side view and extend, opposing one another, to inner surfaces of the half housings11a,11b. Fusing terminals28(FIG. 5), which fuse wires of the coils26, are provided on the front-insulating member24. A three-phase power-supply line29is electrically connected to the fusing terminals28and is routed through openings, which are provided on lower parts of the ribs27. Thereafter, the power-supply line29passes through the interior of a lower-side tilted part30and is connected to a control circuit board61inside a controller60, which is described below. The lower-side tilted part30connects the motor housing4and the battery-holding housing9on a front-lower side of the grip housing8and is tilted such that it is lower in the rear.

The rotor21comprises: a rotary shaft22, which is located at the axial center of the rotor21; a tube-shaped rotor core31, which is disposed around the rotary shaft22and is composed of a plurality of layers of steel plates; and permanent magnets32, which are disposed in the interior of the rotor core31. A sensor circuit board33, on which three rotation-detection devices (not shown) that detect the locations of the permanent magnets32and output rotation-detection signals are installed, is fixed, from the rear, by screws. The sensor circuit board33extends orthogonal to the rotary shaft22. Signal lines (not shown), which output the rotation-detection signals, are connected to a lower end of the sensor circuit board33. These signal lines are also routed through the openings on the lower sides of the ribs27, the same as the power-supply line29, after which they pass through the interior of the lower-side tilted part30and are connected to the control circuit board61.

A rear bearing34axially supports the rear end of the rotary shaft22and is held by rear parts of the ribs27. A fan housing chamber36is defined on the front side of the motor5and inward of the ribs27. The housing chamber36houses a centrifugal fan35, which is for cooling the motor and is mounted on the rotary shaft22forward of the stator20. On the lower side of the fan housing chamber36, a plurality of air-exhaust ports37, (FIG. 5), which are arranged in a circumferential direction, is formed in a lower surface of the motor housing4. On the left and right outer sides of the lower part of the stator20, a plurality of air-suction ports38is formed in the side surfaces of the motor housing4. The air-suction ports38are arranged in a straight line along the front-rear direction.

A front part of the rotary shaft22passes through the ribs27, protrudes forward, and is supported by a front bearing39, which is held by the inner housing13. The front end of the rotary shaft22, which protrudes into the inner housing13, is supported by a sleeve40, which is held by the outer housing14. Between the front bearing39and the sleeve40, a pinion41is formed on the rotary shaft22.

A hollow part45, in which the front and rear are tilted surfaces and the left and right and the upper part are open, is formed on an upper surface of the motor housing4. In the hollow part45, a through hole47, which is oriented in the front-rear direction, is formed in a tilted surface46, which is on the rear side and is located on the upper surface of the grip housing8. A light48is housed inside the through hole47. The light48comprises at least one LED50, which is installed on an LED board49; a lens51covers the front side of the LED(s)50. The light48is housed with a forward-facing attitude such that the lens51faces forward from the through hole47. A front surface of the lens51is tilted downward toward the front, and the light of the LED50can be radiated, above the motor housing4, forward and diagonally upward. A lead wire from the LED board49passes between the ribs27and the rear-side inner surface of the motor housing4and is connected to the control circuit board61.

Rearward of the light48, a grip part (handle)55, which is oriented in the up-down direction, is formed on the grip housing8. A switch56is housed in an upper end of the grip part55. A trigger57protrudes forward from the switch56. A forward/reverse-changing button58of the brushless motor5is provided on an upper side of the switch56. A lock-ON (trigger-lock) button59is provided on a left-side surface of the grip part55rearward of the switch56. The lock-ON button59holds (locks) the trigger57in the pulled-in state so that the user is not required to continuously press the trigger57while performing a cutting (shearing) operation using the shear1.

Downward of the grip part55, a controller60that holds the control circuit board61, whereon a microcontroller, a switching device, and the like are installed, inside a case62is housed, such that it extends in the front-rear direction, in a lower end of the grip housing8. A display operation part63is provided on the control circuit board61and is exposed at (on) an inner bottom surface inside the loop of the grip housing8. The display operation part63is configured to be manually operated to: (i) display the remaining charge of the battery pack10, (ii) display the rotational speed of the brushless motor5, (iii) change the rotational speed of the brushless motor5, and (iv) turn the light48ON and OFF.

In addition, inside the battery-holding housing9downward of the controller60, a terminal block64, to which the battery pack10is electrically connected, is held parallel to the controller60. Mounting parts (a latching groove66that latches an upper end of a hook65, and screw holes67for screw fastening) of the hook65for hanging the shear are respectively provided on the left and right side surfaces of the battery-holding housing9. The hook65can be mounted on either the left or the right side surface.

Turning now to the speed-reducing part7, it includes a spindle70, which is parallel to and located upward of the rotary shaft22. A rear end of the spindle70is supported by a bearing71(a needle bearing) held by the inner housing13. An intermediate portion of the spindle70is supported by a bearing73(a ball bearing) held by a tube part72, which is provided on the front end of the outer housing14. A front end of the spindle70, which passes through the tube part72, protrudes forward. A gear74, which transmits rotation, via an intermediate shaft (not shown), from the pinion41of the rotary shaft22, is fixed to (at) a rear portion of the spindle70.

Forward of the tube part72, an eccentric sleeve75is externally mounted, such that it is integrally rotatable with the spindle70at a location eccentric to the axis line of the spindle70, on the front end of the spindle70. A cam77has a spherical outer surface and is externally mounted, such that it is coaxial and rotatable with the eccentric sleeve75, on the eccentric sleeve75via a bearing76(a needle bearing). Thereby, when the spindle70rotates, the cam77(together with the eccentric sleeve75) moves (rotates) eccentrically about the axis line (center axis or rotational axis) of the spindle70.

A flange78is provided on the front end of the eccentric sleeve75and prevents the eccentric sleeve75and the cam77from slipping forward. A spacer79and a washer80set the forward position of the eccentric sleeve75. The spacer79has a tube shape and is externally mounted on the spindle70forward of the bearing73, and the washer80is disposed forward of the spacer79. The bearing73contacts a step81, which is formed between an intermediate portion of the spindle70having a large diameter and a front-end portion of the spindle70having a small diameter, and is positioned rearward of the bearing73.

The shear part3comprises: a manipulatable (manually-rotatable) ring85, which is rotatably and externally mounted on a base of the tube part72; a tip holder (cutting head)86, which is fixed to a front surface of the manipulatable ring85and has a tube shape that is tapered forward; a pair of (left and right) fixed blades (side blades)87held by the tip holder86; and a movable blade (center blade)88, which is provided such that it is capable of oscillating (pivoting back and forth, i.e. up and down) between the fixed blades87.

As shown inFIG. 6, engaging-recesses89are formed, at prescribed spacings (intervals) in the circumferential direction, in the rear surface of the manipulatable ring85. On the left-side surface of the outer housing14, a cavity90houses: an engaging member (wedge)91, which is capable of moving forward and rearward relative to a rear surface of the manipulatable ring85; a coil spring92, which biases the engaging member91forward; and a lock-release button93. The front side of the engaging member91has an engaging projection (detent)94, which selectively engages with (in) one of the engaging-recesses89of the manipulatable ring85when the engaging projection94is pushed to its advanced (forward-most) position. In the normal state (i.e. when the lock-release button93is not being pressed inwardly), the coil spring92urges the engaging projection94forward into engagement with (in) one of the engaging-recesses89and thereby restricts (blocks) the rotation of the manipulatable ring85relative to the housing2.

The lock-release button93is provided on a lateral side of the shear1and extends inside the cavity90. The lock-release button93is capable of sliding (moving inwardly and outwardly relative to the cavity90) in the left-right direction of the shear1. A projection95is provided on the inner side of the lock-release button93and contacts a tilted guide surface96, which is provided on an outer side of the engaging member91and is tilted toward the right side as it extends in the forward direction.

Because the projection95contacts the rear part of the tilted guide surface96of the engaging member91, which is biased toward the advanced position in the normal state, the lock-release button93is outwardly biased toward a protruding position at which it protrudes from the cavity90toward the left outer side. When the lock-release button93is then pressed inwardly into the cavity90, the engaging member91is caused to retract rearwardly against the biasing of the coil spring92owing to the projection95sliding forward relative to and along the tilted guide surface96. Thereby, the engaging projection94becomes spaced apart (withdraws) from the engaging-recess89, and it becomes possible for the manipulatable ring85to rotate to an arbitrary angle in a rotational direction relative to the housing2. Thereafter, when the manipulatable ring85and thus the shear part3are disposed at a selected angle relative to the housing2and the lock-release button93is released, the manipulatable ring85is again restricted (blocked) from rotating relative to the housing2by the engaging member91, which has once again advanced to its advanced (forward-most) position so that the engaging projection94engages in (with) the closest one of the engaging recesses89.

Thus, the engaging recesses89, the coil spring92, the lock-release button93and engaging projection94function together as a detent system that releaseably locks the rotational position of the shear part3relative to the housing2.

A vertically-extending protective rib97has a height that is higher than the protrusion height of the lock-release button93in the normal state and is disposed on the left-side surface of the outer housing14rearward of the lock-release button93. The protective rib97prevents or reduces the likelihood of the lock-release button93being unintentionally pressed-in, which would permit rotation of the manipulatable ring85relative to the housing2.

The tip holder (cutting head assembly)86will now be described in further detail. The tip holder86has a slit (gap)100, which opens forward in the front-rear direction from the lower surface of the tip holder86. The fixed blades87are fixed by screws102to inner surfaces of both right- and left-side support pieces101that form the slit100. The fixed blades87are tilted upward from the lower side toward the front side of the slit100.

The movable blade88has an intermediate portion portion that is supported in a rotatable manner between the fixed blades87by a bolt104, which passes through the fixed blades87in the left-right direction and spans the support pieces101at the front end of the tip holder86. In addition, the movable blade88has a notch103, which has a semi-circular (spherical) shape and extends forwardly from the rear end of the movable blade88. The notch103mates with the cam77that is provided on the front end of the spindle70. More specifically, the upper and lower inner surfaces of the notch103respectively contact the upper and lower circumferential surfaces of the cam77. Consequently, when the cam77moves (rotates) eccentrically, the movable blade88oscillates (moves) up and down by the same amount of movement of the cam77in the up-down direction. Thus, the shearing (cutting) operation is performed by a tip portion of the movable blade88oscillating (moving) up and down, about the bolt104, between the fixed blades87.

In the rechargeable shear1configured as described above, when the trigger57is pulled, the switch56turns ON so that an ON signal is transmitted from the battery pack10to the control circuit board61of the controller60. The microcontroller of the control circuit board61acquires the rotational state of the rotor21based on detection signals obtained from the rotation-detection devices of the sensor circuit board33and causes the rotor21to rotate by turning the switching device provided on the control circuit board61ON and OFF in accordance with the acquired rotational state, thereby supplying electric current sequentially to the coils26, for each phase, of the stator20.

Thus, when the rotary shaft22rotates together with the rotor21, the spindle70rotates (the rotational speed of which is reduced, compared to the rotational speed of the rotary shaft22, by the pinion41, the intermediate shaft, and the gear74), and the eccentric sleeve75and the cam77are caused to move eccentrically. Consequently, the movable blade88oscillates up and down as described above and the workpiece (material) interposed between the fixed blades87and the movable blade88can be sheared (cut).

At this time, if the light48is turned ON by operating (pressing a button on) the display operation part63, the light radiated from the LED(s)50passes by the motor housing4and the upper side of the gear housing6and irradiates the upper ends of the fixed blades87and the movable blade88and the vicinity along the extension of the upper side thereof. Therefore, the portion of the workpiece (material) that is being sheared (cut) is illuminated and the cutting can be performed easily even in a dark location.

In addition, when it is desired to change the cutting angle, the lock-release button93is pressed, which makes it possible to rotate the tip holder86(and thus the fixed blades87and the movable blade88) together with the manipulatable ring85relative to the housing2. Then, by rotating the manipulatable ring85and re-imposing the restriction on the rotation of the manipulatable ring85by releasing the lock-release button93, the fixed blades87and the movable blade88can be fixed at any arbitrary cutting angle relative to the housing2so that work efficiency can be improved.

In the above-described embodiment, the rechargeable shear1comprises: the brushless motor5having the stator20and the rotor21, which is rotatable relative to the stator20; the motor housing4, which houses the brushless motor5; the grip housing8, which is connected to the motor housing4; the battery-holding housing9, which is connected to the grip housing8; and the shear part3, which is disposed forward of the rotor21and performs the shearing operation by being driven by the rotor21. Therefore, this embodiment provides satisfactory handling characteristics and high power owing to the brushless motor and cordless design.

In addition, the rechargeable shear1of this embodiment comprises: the housing2; the brushless motor5(motor) having the stator20and the rotor21, which is rotatable relative to the stator20; and the shear part3, which is disposed forward of the rotor21and performs the shearing operation by being driven by the rotor21. The housing2comprises the motor housing4, which houses the brushless motor5, the grip housing8, which is connected to the motor housing4, and the battery-holding housing9, which is connected to the grip housing8. The light48for illuminating the shear part3is provided on the housing2. Therefore, in addition to the satisfactory handling characteristics and high power, the portion of the workpiece (material) being sheared by the shear part3is illuminated by the light48, and therefore work efficiency and safety is satisfactory even in a dark location.

Moreover, in the above-described embodiment, the grip housing8has a loop shape extending in the up-down direction and the lower end of the loop shape is located downward of the motor housing4. Therefore, because the light48is provided on the upper surface of the grip housing8, it becomes possible to effectively illuminate the portion of the workpiece being sheared without shadows being formed by the illumination while the shearing (cutting) proceeds along the extension direction of the fixed blades87.

In addition, because the shear part3is rotatable relative to the housing2about a front-rear extending axis, and because the shear part3is provided such that it is capable of being fixed at any arbitrary rotational position, the shearing (cutting) angle of the shear part3can be adjusted (rotated) about the front-rear axis in accordance with the workplace and/or the workpiece, and therefore increased work efficiency can be achieved.

It is noted that the first embodiment described above illustrates a rechargeable shear (also called a “straight shear”) in which the fixed blades and the movable blade are oriented in (along) a straight line, but the present disclosure is not limited thereto. Additional embodiments of the present disclosure are explained below wherein structural elements that are the same as those in the first embodiment are assigned the same reference numbers, and redundant explanation is omitted.

Second Embodiment

In the rechargeable shear1A shown inFIGS. 7-11, the shear part3includes a protruding piece105, which has a longitudinally oriented plate shape that protrudes forward and is integrally formed on the lower side of the fixed blade87on the left side. The movable blade88also protrudes in a longitudinally oriented plate shape (the same as the protruding piece105) on the right side upward of the protruding piece105. A shearing part106is formed by bending tip parts of the protruding piece105and the movable blade88toward the left side, thereby tilting the shearing part106toward the left side such that it is offset from a plane defined by the front, rear, up, and down directions. A front end of the protruding piece105constitutes a latching part107, which protrudes upward facing and guides the workpiece to the shearing part106on the rear side.

In addition, the grip housing8of the second embodiment extends downward from the rear part of the motor housing4, such that the main body housing11has an inverted L shape. The power-supply line29and the signal line of the sensor circuit board33are routed from the opening provided in the upper part of the ribs27, pass, from the rear of the ribs27, through the interior of the grip part55, and are connected to the control circuit board61.

Furthermore, the battery-holding housing9is again provided on the lower end of the grip housing8, similar to the first embodiment. However, the display operation part63and the light48are provided, lined up frontward and rearward, on the upper surface of the battery-holding housing9, which protrudes forward. The light48is provided in a diagonally upward orientation inside a protruding part110, which is provided such that it protrudes from a front-side upper surface of the battery-holding housing9. Therefore, the light emitted from the LED50can irradiate the shearing part106from below.

Thus, in the rechargeable shear1A according to the second embodiment, too, because the brushless motor5is used, the handling characteristics are satisfactory and high power is also obtained. In addition, the shearing angle of the shear part3can be adjusted (rotated) about the central longitudinal axis in accordance with the workplace and/or workpiece, thereby providing improved work efficiency.

Furthermore, because the light emitted from the light48can irradiate the tip of the shear part3from below, the shearing part106can be directly illuminated without hindrance by the housing2in an advantageous manner.

Third Embodiment

In the rechargeable shear1B shown inFIGS. 12-16, the fixed blades87and the movable blade88of the shear part3are arranged in a straight line, the same as in the first embodiment. However, both are formed such that they are elongated in the forward direction, and the shear surface is larger (longer) than in the first embodiment. This design is suited to the cutting of a workpiece that has a relatively thick wall thickness, such as a cement board. Therefore, this embodiment may also be called a “cement shear.”

In addition, instead of a cam, a ball bearing111is externally mounted on the eccentric sleeve75in this embodiment. Therefore, the notch103of the movable blade88mates with the ball bearing111, and the rear end of the movable blade88is capable of oscillating up and down. Other structural elements are the same as those in the first embodiment.

In the rechargeable shear1B according to the third embodiment, too, because the brushless motor5is used, the handling characteristics are satisfactory and high power is also obtained. In addition, because the light48is provided on the upper surface of the grip housing8, the shearing part (cutting head assembly) of the rechargeable shear1B can be effectively illuminated without shadows being formed by the illumination so that the shearing can proceed along the extension direction of the fixed blades87.

Furthermore, because the shearing angle of the shear part3about the axis can be adjusted (rotated) in accordance with the workplace and/or workpiece, improved work efficiency is achievable.

It is noted that the specific structures of the rechargeable shear in each of the embodiments are not limited to the explanation above. For example, in the rechargeable shears according to the first and third embodiments, too, the grip housing having an inverted L shape according to the second embodiment may be used. Furthermore, in the rechargeable shear according to the second embodiment, too, the loop-shaped grip housing according to the first embodiment may be used.

In addition, in each of the embodiments, it is also possible to provide, instead of the grip housing that extends downward, a grip housing that extends rearward from the motor housing along the extension and to provide the battery-holding housing on the rear end thereof. In such an embodiment, the battery pack is slid upward relative to the battery-holding housing or is slid in the left-right direction.

Furthermore, with regard to the arrangement of the light, in the first and third embodiments, the light may be provided on the front surface or the side surface of a lower-side tilted part of the grip housing, and/or the light may be provided on the battery-holding housing. Likewise, in the second embodiment, the light may be provided on the upper surface of the motor housing, the gear housing, or the like. There would be no problem even if the light were provided on a side surface of the housing, and a plurality of lights may be provided.

In addition, in common with each of the embodiments, the controller may be provided inside the grip part, and the front-rear orientation of the brushless motor may be reversed, with the sensor circuit board at the front and the centrifugal fan at the rear. In addition, the brushless motor can also be disposed such that it is oriented in the up-down direction, a diagonal (oblique) direction, or the like relative to the spindle.

EXPLANATION OF THE REFERENCE NUMBERS

11Main body housing

61Control circuit board