CN204566072U - Trigger switch for power tool - Google Patents

Abstract

The utility model provides a trigger switch for an electric tool, which can improve the goodness of the pulling operation and the returning action of the pulling operation part. The trigger switch for an electric tool has a pull operation member that operates an input to a switch main body by pulling, and a lock mechanism that restricts or allows the pull operation of the pull operation member. The locking mechanism has a restricting member that switches states between a restricted state that restricts the pulling operation of the pulling operation member and a retracted state that realizes the pulling operation of the pulling operating member. The pull operation part has a storage space for accommodating the restricting part of the withdrawn state under the situation of the pull operation. Here, the right side sliding contact outer peripheral surface and the left sliding contact outer peripheral surface are provided with a right side convex sliding contact part and a left side sliding contact outer peripheral surface. The side convex sliding contact portion, the right convex sliding contact portion and the left convex sliding contact portion have a shape that is convex toward the inner peripheral surface of the sliding contact, and the sliding and contacting range is set narrow.

Description

Trigger switch for electric tools

technical field

The utility model relates to a trigger switch for an electric tool provided on a tool body of the electric tool, and in detail, relates to a trigger switch for an electric tool having a locking mechanism for double-acting operation.

Background technique

As an electric tool, for example, a portable circular saw is known. Such a portable circular saw is provided with a trigger switch (for example, refer to Patent Document 1 or Patent Document 2). The trigger switch has: a switch main body, which has electrical contact points; and a pull operation part, which is operated by fingers. The toggle operation portion that has been toggled provides an ON input to the switch body, and the switch body sends an ON signal to the control circuit. The pulling operation part is set so that the finger of the holding hand holding the handle of the tool can perform the pulling operation. In addition, when the finger is removed from the snap operation part, the switch main body returns to the normal operation off position (initial position) due to the elastic force of the switch main body itself. The main body of the switch returning to the operation off position does not send an on signal to the control circuit, and the electric tool is in the state of the switch being off. In addition, in such an electric tool, the current may be simply turned on and off by the switch main body without going through the control circuit.

On the other hand, the trigger switch is provided with a lock mechanism that restricts the pulling operation of the pulling operation portion. This lock mechanism is configured to be able to perform a push operation (lockoff operation) which is an operation different from a pull operation of a trigger switch. That is, the lock mechanism has: a restriction member that can abut against the pull operation portion to restrict the pull operation; an urging spring that biases the restriction member so that the restriction member is arranged at a position that can be restricted; and the push operation portion , which switches the restricting member from a restrictive position to a retracted position where a trigger switch can be pulled by a push operation. That is, when the push operation part is pressed, the restriction of the pull operation of the push operation part is released, and the ON input to the trigger switch can be turned on by the pull operation of the push operation part.

Patent Document 1: Publication No. 03-131029 of Shikaihei

Patent Document 2: Publication No. 01-137029 of Shikaihei

However, the restriction member located at the retracted position enters an escape space (inner space) formed in the pull operation portion, thereby avoiding a collision with the pull operation. At this time, the restricting member is in contact with the inner wall surface of the escape space. Specifically, the restricting member relatively moves with respect to the inner wall surface while sliding on the inner wall surface of the escape space during the pull operation of the pull operation portion or during the return operation. Therefore, sliding friction occurs between the inner wall surface and the restricting member. If dust such as cutting chips enters between the friction-generating wall surfaces, such friction tends to increase further. If the friction increases in this way, there is a possibility that the pulling operation and the return operation of the pulling operation part will be deteriorated, so it is desired to reduce such friction as much as possible.

Utility model content

This utility model is completed in view of such a situation, and the problem to be solved by the utility model is: in the trigger switch for an electric tool having a locking mechanism for double-action operation, improve the pull operation of the pull operation part, Returns the goodness of the action.

To solve the above-mentioned problems, the trigger switch for an electric tool according to the present invention adopts the following mechanism. That is, the trigger switch for an electric tool according to the first aspect of the present invention is provided on the tool body of the electric tool, and the trigger switch for the electric tool is characterized by having a pull operation part and a locking mechanism, wherein the pull The operating member is pulled to perform an operation input to the switch main body. The locking mechanism restricts or allows the pulling operation of the pulling operation member. The state is switched between the restricted state of the pull operation and the retreat state allowing the pull operation of the pull operation member, and the pull operation part has the above-mentioned restriction member that accommodates the retract state when the pull operation is performed. In the space structure, the position of the above-mentioned limiting member that slides and contacts the inner peripheral surface of the above-mentioned space structure is set as a sliding contact outer peripheral surface, and the position of the above-mentioned space structure that the above-mentioned sliding contact outer peripheral surface of the above-mentioned limiting member slides and contacts is set. Determined as the sliding contact inner peripheral surface, a convex sliding contact portion is provided on either or both of the above sliding contact outer peripheral surface and the above sliding contact inner peripheral surface, and the convex sliding contact portion has a Form a convex shape, and set the sliding and contacting range narrowly.

According to the trigger switch for an electric tool according to the first aspect, the range in which the sliding contact portion slides and contacts between the sliding contact outer peripheral surface and the sliding contact inner peripheral surface can be narrowed. As a result, even if dust such as cutting chips enters between the sliding contact outer peripheral surface and the sliding contact inner peripheral surface, the dust can be easily removed through the narrow range, thereby suppressing friction between the sliding contact outer peripheral surface and the sliding contact inner peripheral surface. increase. Therefore, according to the trigger switch for an electric tool related to the first utility model, it is possible to form a trigger switch for an electric tool having a locking mechanism for double-action operation, and it is possible to improve the pull operation and return of the pull operation part. goodness of action.

In addition to the trigger switch for an electric tool according to the above-mentioned first aspect, the trigger switch for an electric tool according to the second utility model is characterized in that the convex sliding contact portion is formed so as to cross the direction of the pulling operation. Protruding bumps in the direction of . According to the trigger switch for an electric tool according to the second aspect, the convex sliding contact portion can be provided in a direction intersecting with the pulling operation direction which is easy to slide and make contact. Thereby, the frictional force generated at the position which is easy to slide and come into contact can be reduced.

In addition to the trigger switch for an electric tool according to the first or second aspect, the trigger switch for an electric tool according to a third aspect is characterized in that the restricting member is made of metal. According to the trigger switch for an electric tool according to the third aspect, since the restricting member is made of metal, it is advantageous in terms of wear. Thereby, a highly durable trigger switch for an electric tool can be obtained.

In addition to the trigger switch for an electric tool according to the third aspect, the trigger switch for an electric tool according to the fourth aspect is characterized in that the restricting member is formed by pressing. According to the trigger switch for an electric tool according to the fourth aspect, since the restricting member is formed by press working, the convex sliding contact portion can be easily provided. Thereby, it is possible to obtain a trigger switch for an electric tool which is advantageous in terms of manufacture.

Description of drawings

FIG. 1 is a partially cutaway top view schematically showing a portable circular saw.

FIG. 2 is a plan view schematically showing the interior of the housing of the portable circular saw of FIG. 1 .

Fig. 3 is a plan view showing the appearance of the trigger switch in a side view restricted state.

FIG. 4 is a plan view showing an appearance of the trigger switch of FIG. 3 viewed from above.

Fig. 5 is a plan view showing the appearance of the trigger switch in a retracted state viewed from the side.

FIG. 6 is a plan view showing an appearance of the trigger switch of FIG. 5 viewed from above.

Fig. 7 is a plan view showing the appearance of the trigger switch in a stored state viewed from the side.

FIG. 8 is a plan view showing an appearance of the trigger switch of FIG. 7 viewed from above.

Fig. 9 is a cross-sectional view showing a pull operation member viewed from the arrow (IX)-(IX) of Fig. 7 .

FIG. 10 is a cross-sectional view showing a second embodiment constituting a modified example.

FIG. 11 is a cross-sectional view showing a third embodiment constituting a modified example.

Fig. 12 is a cross-sectional view showing a fourth embodiment constituting a modified example.

FIG. 13 is a cross-sectional view showing a fifth embodiment constituting a modified example.

FIG. 14 is a cross-sectional view illustrating a sixth embodiment constituting a modified example.

FIG. 15 is a cross-sectional view illustrating a seventh embodiment constituting a modified example.

FIG. 16 is a cross-sectional view illustrating an eighth embodiment constituting a modified example.

FIG. 17 is a cross-sectional view illustrating a ninth embodiment constituting a modified example.

Fig. 18 is a cross-sectional view showing a tenth embodiment constituting a modified example.

Fig. 19 is a cross-sectional view showing an eleventh embodiment constituting a modified example.

Fig. 20 is a cross-sectional view showing a twelfth embodiment constituting a modified example.

Explanation of reference signs:

10...portable circular saw (electric tool); 11...tool body; 13...drive unit; 130...motor casing; 15...electric motor; 151...magnetic field generating part (field); 152...armature; 155...motor shaft; 17 ...Reduction gear unit; 18...Output shaft; 20...Saw blade cover; 21...Handle part; 23...Main handle part (main handle); 230...Handle shell; 231...Upper connection part; 235...Rear side connection part; 25...Auxiliary handle; 250...Handle shell; 27...Base; 29...Power cord; 30(30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H, 30I, 30J, 30K)...Trigger switch; 31... Trigger switch main body; 32...switch main body; 320...switch shell; 325...through part; 327...flange body; 33...pull operation parts; 35...operating body; 371…upper side; 40…lock mechanism; 41…press-in operation part; 42…operating body; 43…operating shaft; 45…hook portion; 47…coil spring; 48…cover; 487…inner wall; 51…lock Action part; 52...Space structure part; 53...Notch part; 531...Inner surface; 54...Space peripheral part; 540...Inner peripheral surface; 55...Storage opening; ...shaft; 573...hook; 575...off-preventing flange; 58...hook hole; 61(61K)...restricting member; 610...outer peripheral surface; 63...guide slot; …step differential surface; 69…locking recess; 70…sliding contact outer peripheral surface; 71…right sliding contact outer peripheral surface; 72(72B, 72D, 72F, 72H, 72J)…right convex sliding contact portion; 73( 73B, 73D, 73F, 73H, 73J) ... right contact end; 75 ... left sliding contact outer peripheral surface; 76 (76B, 76D, 76F, 76H, 76J) ... left convex sliding contact part; 77 (77B, 77D, 77F, 77H, 77J)...left contact end; 80...sliding contact inner peripheral surface; 81...right sliding contact inner peripheral surface; 82A, 82C, 82E, 82G, 82I...right convex sliding contact part; 83A, 83C, 83E, 83G, 83I...Right contact end; 85...Left sliding contact inner peripheral surface; 86A, 86C, 86E, 86G, 86I, 86K...Left convex sliding contact part; 87A, 87C, 87E , 87G, 87I, 87K...left contact end; S...storage space.

Detailed ways

[first embodiment]

Hereinafter, various embodiments for implementing the trigger switch for an electric tool according to the present invention will be described with reference to the drawings. First, a first embodiment will be described. The top view of FIG. 1 schematically shows the portable circular saw 10 , and shows the arrangement position of the power cord 29 with a part cut away. The top view of FIG. 2 schematically shows the interior of the portable circular saw 10 of FIG. 1 . In addition, when this portable circular saw 10 is demonstrated, it demonstrates using the direction of front, back, up, down, left, and right prescribed|regulated by the cutting progress direction of a cutter. The portable circular saw 10 shown in FIG. 1 and FIG. 2 corresponds to an electric tool according to the present invention, and an AC power source is used as a power source. This portable circular saw 10 is equipped with a not-shown blade as a saw blade. The portable circular saw 10 is placed on a surface of a cutting material not shown, and is used as a cutting machine that cuts a cutting material while sliding on the surface. The portable circular saw 10 generally includes a tool body 11 to which a saw blade is attached, and a base 27 placed on the surface of the cutter. The tool main body 11 generally includes: a driving unit 13 having a function of driving a cutter; and a handle unit 21 having a function of being operated by a tool user.

The driving unit 13 generally includes an electric motor 15 and a reduction gear unit (not shown). The electric motor 15 and the reduction gear unit are supported by a metal motor case 130 . The electric motor 15 is provided inside the motor housing 130 . The electric motor 15 is constituted by a so-called brush motor. As shown in FIG. 2 , the electric motor 15 has a magnetic field generating portion (field) 151 supported by a motor case 130 and an armature 152 attached to a motor shaft 155 . The magnetic field generating part (field) 151 has a coil (not shown) wound with an electric wire, and is supported by the motor case 130 . The armature 152 has a permanent magnet and is supported by the motor shaft 155 . The motor shaft 155 is supported by the motor housing 130 via appropriate bearings (not shown).

The reduction gear unit has an output shaft 18 to which the saw blade shown in FIG. 1 is attached, and a reduction gear (not shown) supported by the output shaft 18 . The output shaft 18 is supported by the motor housing 130 via appropriate bearings (not shown). The reduction gear meshes with a gear attached to the motor shaft 155 . In this way, the rotational driving force of the motor shaft 155 that performs rotational driving is decelerated by the reduction gear to drive the output shaft 18 to rotate. A part of the output shaft 18 is exposed to the outside. A saw blade (not shown) can be attached to the output shaft 18 . A blade cover 20 is provided on the outer periphery of the output shaft 18 to which the saw blade is attached. The blade cover 20 is integrally combined with the motor housing 130 .

The handle portion 21 roughly includes a main handle portion 23 and a sub handle portion 25 . The main handle portion 23 is formed of a ring-shaped resin handle case 230 . The main handle part 23 is arranged on the upper side and the rear side opposite to the driving part 13 . That is, when the main handle portion 23 is formed, the handle housing 230 is connected and supported by the motor housing 130 by the upper connection portion 231 and the rear connection portion 235 . The upper connection portion 231 is disposed on the upper side opposite to the motor housing 130 . The rear connection portion 235 is disposed on the rear side facing the motor housing 130 . Therefore, the main handle part 23 is arrange|positioned rather than the output shaft 18 on the rear side. The main handle portion 23 is provided so as to incline downward from the front to the rear. Such an inclination of the main handle portion 23 makes it easy for the tool user to push the portable circular saw 10 toward the front side when using the portable circular saw 10 . In addition, the main handle part 23 corresponds to the main body handle which concerns on this invention.

On the other hand, a sub handle part 25 is provided on the front side of the main handle part 23 . The auxiliary handle portion 25 is used to press the saw blade attached to the output shaft 18 toward the lower cutter. Therefore, the sub handle part 25 is arranged on the front side more opposite to the output shaft 18, and selects a shape that is easy to press downward. The sub handle part 25 is also formed of a resin handle case 250 similarly to the main handle part 23 . The auxiliary handle part 25 is also connected and supported by the motor housing 130 . In addition, a power cord 29 is drawn out at the rearmost portion of the handle housing 230 . This power cord is connected to a household power outlet (AC power supply). This power line 29 is electrically connected to a trigger switch 30 described below.

A trigger switch 30 , which will be described later, is attached to an upper portion of the main handle portion 23 . The trigger switch 30 is attached to the handle case 230 so that it can be pulled even when the tool user holds the main handle portion 23 with his hand. More specifically, the trigger switch 30 is arranged in the handle case 230 at a position facing the index finger of the gripping hand when the tool user grips the main handle portion 23 with his hand. Therefore, the toggle operation member 33 of the trigger switch 30 to be toggled is disposed so as to protrude toward the ring-shaped inner peripheral side of the handle housing 230 .

Next, the trigger switch 30 will be described. The top view of FIG. 3 shows the appearance of the trigger switch 30 in a restricted state viewed from the side. The top view of FIG. 4 shows the appearance of the trigger switch 30 of FIG. 3 when viewed from above. The top view of FIG. 5 shows the appearance of the trigger switch 30 viewed from the side in the withdrawn state. The top view of FIG. 6 shows the appearance of the trigger switch 30 of FIG. 5 viewed from a top view. The top view of FIG. 7 shows the appearance of the trigger switch 30 in a stored state viewed from the side. The top view of FIG. 8 shows the appearance of the trigger switch 30 of FIG. 7 viewed from above. The cross-sectional view of FIG. 9 is a cross-sectional view of the pull operation member 33 , showing a view from the (IX)-(IX) cross-sectional plane of FIG. 7 .

In addition, when demonstrating this trigger switch 30, it demonstrates using the direction of front-back, up-down, left-right, and the predetermined|prescribed according to the toggle operation of the trigger switch 30. As shown in FIG. Incidentally, the front, rear, up, down, left, and right directions when describing the trigger switch 30 and the front, rear, up, down, left, and right directions when describing the above-mentioned portable circular saw 10 are shifted from the front and rear directions of the main handle portion 23. The amount of inclination angle is specified in the front, rear, up, and down directions. In addition, the state of the trigger switch 30 ( T1 ) shown in FIG. 3 and FIG. 4 is a locked state in which a pull operation cannot be performed. In this state, a restricting member 61 , which will be described in detail later, is in a restricting state. In addition, the state of the trigger switch 30 ( T2 ) shown in FIG. 5 and FIG. 6 is a lock-off state (retreat state) in which the pull operation can be performed. In this state, the restricting member 61 is in the withdrawn state. In addition, the state of the trigger switch 30 (T3) shown in FIG. 7 and FIG. 8 is the state in which the pull operation was performed. In this state, the restricting member 61 is in the accommodated state.

The trigger switch 30 shown in FIGS. 3 to 8 is an operation switch provided on the tool body 11 of the portable circular saw 10 described above. The trigger switch 30 is a so-called double-action switch that can be operated by sequentially performing two different operation actions when the switch is turned on. In order to realize such a double-action operation switch, the trigger switch 30 has a structure in which a lock mechanism 40 is provided in addition to the structure of a normal trigger switch. That is, the trigger switch 30 generally includes a trigger switch main body 31 and a lock mechanism 40 that restricts operations related to the trigger switch main body 31 . As far as the structure of the trigger switch main body 31 is concerned, it is constituted substantially in the same manner as a general single action (one action) operation trigger switch. The trigger switch main body 31 generally includes a switch main body 32 and a toggle operation member 33 . The switch main body 32 includes a switch case 320 forming an exterior. An electrical contact point (not shown) is provided inside the switch housing 320 in the same manner as a normal switch, and an internal urging spring (not shown) for opening the electrical contact point is provided.

The electrical contact point of the switch main body 32 is kept in a normal state of being opened by the urging force of the internal urging spring unless the cocking operation by the cocking operation member 33 described next is not performed. Conversely, when the pull operation of the pull operation member 33 is performed against the urging force of the internal urging spring, the electrical contact point of the switch main body 32 is in a closed state. In addition, when the electric contact point is in the closed state, electric power is supplied to the electric motor 15 so as to drive the motor shaft 155 to rotate. Conversely, if the electric contact point is in the open state, the electric power supply to the electric motor 15 is cut off, and the rotational drive of the motor shaft 155 is stopped.

The pull operation part 33 is an operation input part, which performs an operation input to make the electrical contact point of the main body 32 in a closed state by pulling a switch. Incidentally, the operation input to make the electric contact point in the closed state is performed by pulling the pulling operation member 33 against the urging force of the internal biasing spring of the switch main body 32 . The pull operation member 33 is configured so that the pull operation can be performed with the index finger or middle finger of the hand holding the main handle portion 23 while the tool user is holding the main handle portion 23 with his hand. The snap operation member 33 roughly includes an operation body 35 and a frame portion 37 . The operating body 35 is set at a position exposed to the outside so that the user of the tool can pull it. As shown in the figure, the operation body 35 is formed in a substantially rectangular shape. The finger hook portion 351 constituting the front outer peripheral surface of the operation body 35 is formed to have an appropriately curved concave shape. The finger hook portion 351 is easily pulled by the index finger or middle finger of the hand holding the main handle portion 23 .

A frame portion 37 is connected to the rear portion of the operation body 35 . The frame portion 37 is formed integrally with the operating body 35 and enters the inside of the switch main body 32 . The rear end portion of the frame portion 37 that enters into the switch main body 32 is configured to act on an electrical contact built in the switch main body 32 . That is, when the operating body 35 is pulled, the frame portion 37 functions to close the electrical contact point. In addition, when the operation body 35 is not pulled, the frame portion 37 receives the urging force of the internal urging spring of the switch main body 32 and returns to the initial state protruding from the inside of the switch main body 32 to the front side. Therefore, the electrical contacts built into the switch body 32 are in an open state.

The trigger switch 30 is provided with a lock mechanism 40 that restricts or permits the pulling operation of the above-mentioned pulling operation member 33 . This lock mechanism 40 is a mechanism for applying a double-action operation to the above-mentioned single-action trigger switch main body 31 . That is, the lock mechanism 40 has a function of restricting or allowing the pulling operation of the pulling operation member 33 . The lock mechanism 40 generally includes a push operation portion 41 and a lock action portion 51 . The push-in operation part 41 is also configured to be exposed to the outside and operated like the operation body 35 of the trigger switch main body 31 . The push operation unit 41 roughly includes an operation body 42 , a coil spring 47 , and a cover 48 . The operating body 42 is a member that receives the pressing operation of the tool operator due to the double action operation. The operating body 42 can be pushed in with the thumb of the hand holding the main handle 23 while the tool user is holding the main handle 23 . The operating body 42 is supported by the switch housing 320 so as to be operable to be pushed in from the left side to the right side. In addition, the switch housing 320 is provided with a penetration portion 325 through which the operating body 42 can pass through appropriately when the operating body 42 is supported.

As shown in FIGS. 4 , 6 , and 8 , the operating body 42 includes an operating shaft 43 protruding outward from the switch housing 320 and a hook 45 integrated with the operating shaft 43 and acting on the lock action portion 51 . The operation shaft 43 has a shaft shape protruding leftward from the switch housing 320 . The inner side constituting one side of the operation shaft 43 enters the through portion 325 of the switch housing 320 . The outer side constituting the other side of the operation shaft 43 protrudes outward from the penetration portion 325 of the switch case 320 . The outer end of the operating shaft 43 is covered with a cover 48 . The cover 48 enables good finger abutment during the push-in operation with the thumb. The inner end of the operation shaft 43 that enters the through portion 325 is connected to the bent hook portion 45 in a hook shape. Therefore, as shown in FIGS. 4 , 6 , and 8 , the hook portion 45 moves integrally with the movement of the operation shaft 43 in the left-right direction. The bent hook portion 45 is hooked to a locking recessed portion 69 of a restriction member 61 described later. Therefore, comparing FIG. 4 , FIG. 6 , and FIG. 8 , it can be seen that the movement of the hook portion 45 and the operation shaft 43 in the left-right direction is integrated, and the restriction member 61 also moves.

In addition, a coil spring 47 is attached to an externally exposed portion of the operation shaft 43 . The coil spring 47 is an urging spring for returning the push-in operation part 41 to the initial position before the push-in. For the coil spring 47 , the left end constituting one end abuts against the flange body 327 fixed to the switch case 320 , and the right end constituting the other end abuts against the inner wall 487 of the cover 48 . In this way, the operation shaft 43 integrated with the cover 48 can always be biased toward the left. In addition, the coil spring 47 arranges the restricting member 61 described below in a restricted state by returning the push-in operation portion 41 to the initial position before the push-in. That is, the coil spring 47 can urge the operation body 42 for interlocking the restricting member 61 toward the left side so that the restricting member 61 is in the restricted state.

Next, the locking action portion 51 will be described. The lock action portion 51 is operated by the above-mentioned push-in operation portion 41 to restrict or allow the pull operation of the pull operation member 33 . The locking action portion 51 roughly includes a space structure portion 52 and a restricting member 61 . The space structure portion 52 is formed as a peripheral wall for forming the storage space S in the pull operation member 33 . The storage space S formed by the space structure portion 52 is provided as a space structure capable of storing the restriction member 61 in the withdrawn state when the trigger switch 30 is pushed. This space structure portion 52 is formed by providing a substantially rectangular cutout portion 53 (storage space S) on the upper portion of the pull operation member 33 . The notch portion 53 has a shape extending in the pulling operation direction of the pulling operation member 33 . In addition, the height in the vertical direction of the cutout portion 53 has a height (length) equal to or greater than the thickness of the regulating member 61 described below.

Specifically, the space structure portion 52 has a space peripheral portion 54 due to the notch portion 53 . The space peripheral portion 54 is provided to form the same plane as the front surface and the side surface of the pull operation member 33 , and to surround the front, left, and right sides with respect to the notch portion 53 . The space peripheral portion 54 has a shape that protrudes upward by one step from the inner surface 531 (the bottom surface of the storage space S) of the notch portion 53 . A storage opening 55 that is flush with the inner surface 531 of the notch 53 is provided at the rear of the space peripheral portion 54 . Therefore, the inner surface 531 of the space structure part 52 and the upper surface 371 of the frame part 37 are connected to the same plane. The storage opening 55 has an opening shape into which the restricting member 61 can enter. The restricting member 61 can enter the storage space S formed by the space structure portion 52 from the storage opening 55 while slidingly contacting the upper surface 371 of the frame portion 37 , and the restricting member 61 can be accommodated in the storage space S.

A rivet member 57 is attached substantially at the center of the space structure portion 52 . As shown in FIG. 9 , this rivet member 57 has a shaft portion 571 , a hook portion 573 , and a detachment preventing flange portion 575 . The shaft portion 571 is set to extend in the vertical direction. The shaft portion 571 is loosely fitted in the long guide hole 63 provided in the restricting member 61 so as to be movable. A hook portion 573 is provided at the lower end portion of the shaft portion 571 . The hook portion 573 fixes the shaft portion 571 to the hook hole 58 provided in the space structure portion 52 . The drop-off prevention flange portion 575 is formed in a circular flat plate shape having a diameter larger than the groove width of the long guide hole 63 . Therefore, the fall-off preventing flange portion 575 restricts fall-off of the shaft portion 571 loosely fitted into the guide elongated hole 63 .

Here, the left side portion of the rear end of the space peripheral portion 54 is set to lock the locking end portion 56 of the restricting member 61 described below. As shown in FIGS. 4 , 6 , and 8 , the locking end portion 56 has a shape capable of locking the stepped surface 661 of the stepped convex portion 66 set on the restricting member 61 . Specifically, the end surface of the locking end portion 56 has an end surface shape that inclines toward the front side as it goes from the inner side (right side) to the outer side (left side). Furthermore, the stepped surface 661 of the restricting member 61 abutting on the locking end portion 56 receives resistance toward the outside (left side) from the locking end portion 56 due to the inclined end surface shape. Therefore, the locking of the locking end portion 56 to the abutting stepped surface 661 is more firmly locked as the force of the abutting force of the stepped surface 661 and the locking end portion 56 increases. Of the inner peripheral surfaces 540 of the space peripheral portion 54 , the left and right inner peripheral surfaces 540 are in contact with the sliding contact outer peripheral surface 70 of the regulating member 61 to be described later while sliding thereon. The inner peripheral surfaces 540 on the left and right sides are set to be in sliding contact with the inner peripheral surfaces 80 which will be described in detail later.

The restricting member 61 will be described. The restricting member 61 is a metal member formed by press working. In addition, this restricting member 61 can perform state switching between the restricting state ( T1 ) shown in FIGS. 3 and 4 and the retracted state ( T2 ) shown in FIGS. 5 and 6 . In addition, the restricting member 61 in the restricting state ( T1 ) restricts the pulling operation of the pulling operation member 33 , and the restricting member 61 in the retracted state ( T2 ) enables (permits) the pulling operation of the pulling operating member 33 . The restricting member 61 is substantially rectangular. The restricting member 61 extends in the front-rear direction that coincides with the pull operation direction of the pull operation member 33 . The guide elongated hole 63 is provided at approximately the center of the restricting member 61 as an elongated hole extending in the pulling operation direction (front-rear direction) of the pulling operation member 33 . As described above, the shaft portion 571 of the rivet member 57 is loosely fitted into the long guide hole 63 . A locking recess 69 is provided at the rear of the restricting member 61 . The locking recessed portion 69 is inserted into and locked by the hook portion 45 of the push-in operation portion 41 .

A stepped convex portion 66 is provided on the left side of the outer peripheral surface 610 of the restricting member 61 . The stepped convex portion 66 is provided so as to protrude leftward from the outer peripheral surface 610 . The front surface of the stepped convex portion 66 is set as a stepped surface 661 . When the restricting member 61 is in the restricting state ( T1 ), as described above, the stepped surface 661 comes into contact with the locking end portion 56 at the rear end of the space peripheral portion 54 . A shape corresponding to the locking end portion 56 is selected for the stepped surface 661 . That is, the stepped surface 661 selects a shape capable of surface-contacting the locking end portion 56 . Specifically, the stepped convex portion 66 also has an end surface shape inclined to the front side as it goes from the inner side (right side) to the outer side (left side) like the locking end portion 56 . Therefore, the stepped surface 661 of the stepped convex portion 66 and the mutually inclined surfaces of the locking end portion 56 of the space peripheral portion 54 are in surface contact with each other. That is, as described above, the locking of the locking end portion 56 to the stepped surface 661 abutting against each other becomes more firmly locked as the force of mutual abutting increases.

The restriction member 61 shown in FIG. 5 and FIG. 6 can perform a pull operation on the pull operation member 33 in the withdrawn state ( T2 ). In addition, in the accommodated state of the restricting member 61 shown in FIGS. 7 and 8 , the snap operation member 33 ( T2 ) can be operated in such a way that the snap operation member 33 ( T3 ) for the snap operation returns to the initial state. effect. During the mutual reciprocating movement between the pulling operation state ( T3 ) of the above-mentioned pulling operation member 33 and the operation of returning to the initial state ( T2 ) of the pulling operation member 33 , the outer peripheral surface 610 of the limiting member is relatively spaced with respect to the space peripheral portion 54 (spatial structure). The inner peripheral surface 540 of the part 52) slides and contacts. That is, on the outer peripheral surface 610 of the restricting member 61 , the sliding outer peripheral surface 70 that slides and contacts the sliding inner peripheral surface 80 of the space peripheral portion 54 (space structure portion 52 ) is provided. The sliding contact outer peripheral surface 70 is set as outer peripheral surfaces 610 on both left and right sides. Specifically, the entire circumference of the surface facing the right side of the outer peripheral surface 610 of the restricting member 61 is set to be in sliding contact with the outer peripheral surface 71 on the right side. In addition, among the outer peripheral surfaces 610 of the restricting member 61 , the outer peripheral surface 610 related to the stepped convex portion 66 is set to be in sliding contact with the outer peripheral surface 75 on the left side. The right sliding contact outer peripheral surface 71 and the left sliding contact outer peripheral surface 75 slide and contact with the sliding contact inner peripheral surface 80 of the space peripheral portion 54 (space structure portion 52 ).

In the first embodiment, the right sliding contact outer peripheral surface 71 and the left sliding contact outer peripheral surface 75 are provided with a right convex sliding contact portion 72 and a left convex sliding contact portion 76 . The above-mentioned right convex sliding contact portion 72 and the left convex sliding contact portion 76 are formed so as to protrude toward the sliding contact inner peripheral surface 80 . Therefore, the range of the sliding contact positions of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 with respect to the sliding contact inner peripheral surfaces 80 becomes narrow. The right convex sliding contact portion 72 and the left convex sliding contact portion 76 are formed with protrusions protruding in the left and right directions intersecting the front and rear directions constituting the pulling operation direction of the pulling operation member 33 . In addition, the right convex sliding contact portion 72 and the left convex sliding contact portion 76 are further formed with protrusions protruding in a direction intersecting with the direction in which the main handle portion 23 extends.

Specifically, as shown in FIG. 9 , the right convex sliding contact portion 72 provided on the right sliding contact outer peripheral surface 71 is formed by having a right contact end portion 73 formed with a direction toward the outside in cross-sectional view ( Right) The sharpened bump. The sharp right contact end portion 73 is in contact with the flat sliding contact inner peripheral surface 80 within a narrow contact range. Such a sharp right contact end portion 73 is in the form of a line extending in the front-rear direction. In addition, as shown in FIG. 9 , the left convex sliding contact part 76 provided on the left sliding contact outer peripheral surface 75 is also formed with a left contact end part 77 formed with a sectional view outward (left side). side) sharpened protrusions. The sharp left contact end portion 77 is also in contact with the flat sliding contact inner peripheral surface 80 within a narrow contact range. Such a sharp left contact end portion 77 also forms a line extending in the front-rear direction. In addition, the sliding contact inner peripheral surface 80 of the first embodiment has a planar shape extending flatly in the up-down, front-back direction.

The sharp right contact end portion 73 and left contact end portion 77 are in line contact rather than surface contact with the planar sliding inner peripheral surface 80 extending flatly in the up-down, front-back direction. Therefore, the state of the restricting member 61 is switched to the retracted state (T2) shown in FIGS. In the case of the shown storage state (T3), the following sliding contact trajectory is formed, that is, the relative movement trajectory of the above-mentioned sharp right contact end portion 73 and left contact end portion 77 relative to the sliding contact inner peripheral surface 80 is in the form of line contact. The moving trajectory is the contact trajectory of the narrow contact range. In addition, the right contact end portion 73 and the left contact end portion 77 that are lines can also be set to properly divide the lines, so as to further narrow the contact range.

The trigger switch 30 according to the first embodiment described above operates as follows. That is, in the states shown in FIGS. 3 and 4 , the restricting member 61 is in the restricting state ( T1 ). In this case, when the pull operation member 33 is to be pulled, the stepped surface 661 of the restricting member 61 comes into contact with the locking end portion 56 of the pull operation member 33 . That is, the pull operation member 33 is in a locked state and cannot be pulled. Here, when the push-in operation part 41 of the lock mechanism 40 is pushed in, the restricting member 61 in the state shown in FIGS. 5 and 6 is brought into the withdrawn state ( T2 ). In this case, the step difference surface 661 of the restricting member 61 does not come into contact with the locking end portion 56 of the pull operation member 33 , and therefore the pull operation member 33 can be pulled. That is, the pull operation member 33 is in a lock-off state where the pull operation can be performed. Here, when the snap operation member 33 is snapped, the restricting member 61 in the state shown in FIG. 7 and FIG. 8 is housed in the storage space S to be in the housed state ( T3 ). In addition, when both the pushing operation of the pushing operation part 41 and the pulling operation of the pulling operation member 33 are stopped, the biasing force of the coil spring 47 and the internal biasing spring of the trigger switch 31 is received. In this way, the restricting member 61 accommodated in the storage space S protrudes from the storage space S, and returns to the restricted state ( T1 ) shown in FIGS. 3 and 4 .

According to the trigger switch 30 of the first embodiment described above, the following effects can be achieved. That is, according to the above-mentioned trigger switch 30, when the pull operation member 33 is pulled or returned, the contact between the sliding contact outer peripheral surface 70 and the left convex sliding contact portion 72 and the left convex sliding contact portion 76 can be reduced. The sliding contact range between the sliding contact inner peripheral surfaces 80 . As a result, even if dust such as cutting chips enters between the sliding contact outer peripheral surface 70 and the sliding contact inner peripheral surface 80 , it is easy to remove the dust using the narrow range, thereby preventing the gap between the sliding contact outer peripheral surface 70 and the sliding contact inner peripheral surface 80 from being broken. increase in friction. Therefore, according to the trigger switch 30 described above, it is possible to form the trigger switch 30 having the locking mechanism 40 for double-action operation, and to improve the quality of the pull operation and return operation of the pull operation member 33 . In addition, according to the trigger switch 30 described above, the right convex sliding contact portion 72 and the left convex sliding contact portion 76 can be provided in a direction intersecting with the pull operation direction which is easy to slide and contact. Accordingly, it is possible to reduce the frictional force generated at the position where sliding contact is easy. In addition, according to the trigger switch 30 described above, since the restricting member 61 is made of metal, it is possible to obtain the trigger switch 30 which is formed favorably in terms of wear and has high durability. In addition, according to the trigger switch 30 described above, since the restricting member 61 is formed by press working, the right convex sliding contact portion 72 and the left convex sliding contact portion 76 can be easily provided. Thereby, the trigger switch 30 which is advantageous in terms of manufacture can be obtained.

[Second Embodiment]

Hereinafter, various modified examples of the trigger switch 30 of the above-mentioned first embodiment will be described. In addition, various modification examples described below are modification examples related to the sliding contact outer peripheral surface 70 and the sliding contact inner peripheral surface 80 of the above-mentioned first embodiment. Therefore, various modifications described below will be described with reference to drawings corresponding to FIG. 9 referred to in the above-mentioned first embodiment. In addition, positions other than the sliding contact outer peripheral surface 70 and the sliding contact inner peripheral surface 80 are configured in the same manner as the trigger switch 30 of the first embodiment described above. Therefore, in the following description of the embodiment, the reference numerals given in the description of the first embodiment will be used and the description will be omitted. That is, the trigger switch 30A shown in the cross-sectional view of FIG. 10 represents the second embodiment constituting a modified example of the first embodiment.

For the trigger switch 30A of the second embodiment, the convex sliding contact portion according to the present invention is provided on the sliding contact inner peripheral surface 80 , but not on the sliding contact outer peripheral surface 70 . As shown in FIG. 10 , the right sliding contact inner peripheral surface 81 and the left sliding contact inner peripheral surface 85 are provided with a right convex sliding contact portion 82A and a left convex sliding contact portion 86A. The above-mentioned right convex sliding contact portion 82A and the left convex sliding contact portion 86A are formed so as to be convex toward the sliding contact outer peripheral surface 70 . Therefore, the range of sliding contact positions between the right convex sliding contact portion 82A and the left convex sliding contact portion 86A relative to the sliding contact outer peripheral surface 70 is narrow. The right convex sliding contact portion 82A and the left convex sliding contact portion 86A are formed with protruding protrusions in the left and right directions intersecting the front and rear directions constituting the pulling operation direction of the pulling operation member 33 . In addition, the above-mentioned right convex sliding contact portion 82A and the left convex sliding contact portion 86A are formed with protruding protrusions in a direction intersecting the direction in which the above-mentioned main handle portion 23 extends.

Specifically, as shown in FIG. 10 , the right convex sliding contact portion 82A provided on the right sliding contact inner peripheral surface 81 is formed with a right contact end portion 83A formed with a (Left) Tapered bumps. This sharp right contact end portion 83A is also in contact with the flat sliding contact outer peripheral surface 70 within a narrow contact range. Such a sharp right contact end portion 83A forms a line extending in the front-rear direction. In addition, as shown in FIG. 10 , the left convex sliding contact portion 86A provided on the left sliding contact inner peripheral surface 85 is also formed with a left contact end portion 87A formed with a right side in cross-sectional view. Pointed bumps. This sharp left contact end portion 87A is also in contact with the flat sliding contact outer peripheral surface 70 within a narrow contact range. Such a sharp left contact end portion 87A also forms a line extending in the front-rear direction. In addition, the sliding contact outer peripheral surface 70 of this second embodiment has a planar shape extending flatly in the up-down, front-back direction.

Such sharp right contact end portion 83A and left contact end portion 87A are in line contact rather than surface contact with the sliding contact outer peripheral surface 70 which is flat and planar in the up-down, front-back direction. Therefore, the relative movement trajectory of the sharp right contact end portion 83A and the left contact end portion 87A with respect to the sliding contact outer peripheral surface 70 is a line contact trajectory, that is, a contact trajectory with a narrow contact range. In addition, the right contact end portion 83A and the left contact end portion 87A that are lines can also be set to properly divide the lines, so as to further narrow the contact range. In addition, in the trigger switch 30A of the second embodiment configured in this way, it is advantageous in that it is provided on the operation body 35 with respect to the pull operation member 33 . In addition, also in the trigger switch 30A of the second embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Third Embodiment]

The trigger switch 30B shown in the cross-sectional view of FIG. 11 represents a third embodiment constituting a modified example of the first embodiment. Compared with the shapes of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment, the right convex sliding contact portion 72B and the left convex sliding contact portion 76 of the third embodiment shown in FIG. The shape of the sliding contact portion 76B differs in the degree of sharpness of the sharpened protrusion. The above-mentioned sharp right contact end portion 73B and left contact end portion 77B are in point contact with the planar sliding contact inner peripheral surface 80 instead of surface contact, so that the movement trajectory is linear. With such a configuration, the peripheral clearance can be increased compared with the shapes of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment described above. Therefore, it is advantageous in expanding the space for removing dust such as cutting chips. In addition, also in the trigger switch 30B of the third embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Fourth Embodiment]

A trigger switch 30C shown in the cross-sectional view of FIG. 12 represents a fourth embodiment constituting a modified example of the second embodiment. Compared with the shapes of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment, the right convex sliding contact portion 82C and the left convex sliding contact portion 86A of the fourth embodiment shown in FIG. The shape of the sliding contact portion 86C differs in the sharpness of the sharpening protrusion. The above-mentioned sharp right contact end portion 83C and left contact end portion 87C are in point contact with the planar sliding contact outer peripheral surface 70 instead of surface contact, so that the locus of movement is linear. With such a configuration, the peripheral clearance can be increased compared with the shape of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment described above. Therefore, it is advantageous in expanding the space for removing dust such as cutting chips. In addition, also in the trigger switch 30C of the fourth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Fifth Embodiment]

A trigger switch 30D shown in the sectional view of FIG. 13 represents a fifth embodiment constituting a modified example of the first embodiment. Compared with the shapes of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment, the right convex sliding contact portion 72D and the left convex sliding contact portion 72D and the left convex sliding contact portion of the fifth embodiment shown in FIG. The shape of the sliding contact portion 76D is different in that the abutting surface is formed in an arc shape. The arc-shaped right contact end portion 73D and the left contact end portion 77D are in point contact with the plane-shaped sliding contact inner peripheral surface 80 instead of surface contact, so that the movement trajectory is linear. With such a configuration, compared with the shape of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment described above, it is easier to make the contact force received by the contact surface in the arc direction. Dispersion on the surface is advantageous in securing rigidity for sliding contact. In addition, also in the trigger switch 30D of the fifth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the first embodiment described above are achieved.

[Sixth Embodiment]

A trigger switch 30E shown in the cross-sectional view of FIG. 14 represents a sixth embodiment constituting a modified example of the second embodiment. Compared with the shapes of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment, the right convex sliding contact portion 82E and the left convex sliding contact portion 86A of the sixth embodiment shown in FIG. The shape of the sliding contact portion 86E differs in that the abutting surface is formed in an arc shape. The arc-shaped right contact end portion 83E and the left contact end portion 87E are in point contact with the planar sliding contact outer peripheral surface 70 instead of surface contact, so that the movement trajectory is linear. With such a configuration, compared with the shape of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment described above, it is easier to make the contact force received by the contact surface in the arc direction. Dispersion on the surface is advantageous in securing rigidity for sliding contact. In addition, also in the trigger switch 30E of the sixth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Seventh Embodiment]

The trigger switch 30F shown in the cross-sectional view of FIG. 15 represents the seventh embodiment constituting a modified example of the fifth embodiment. Compared with the shapes of the right convex sliding contact portion 72D and the left convex sliding contact portion 76D of the fifth embodiment, the right convex sliding contact portion 72F and the left convex sliding contact portion 76D of the seventh embodiment shown in FIG. The shape of the sliding contact portion 76F is different in that the arc shape of the contact surface is narrowed. The small arc-shaped right contact end portion 73F and left contact end portion 77F are in point contact with the planar sliding contact inner peripheral surface 80 instead of surface contact, so that the movement trajectory is linear. With such a configuration, the peripheral clearance can be increased compared with the shape of the right convex sliding contact portion 72D and the left convex sliding contact portion 76D of the fifth embodiment described above. Therefore, it is advantageous in expanding the space for removing dust such as cutting chips. In addition, also in the trigger switch 30F of the seventh embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Eighth Embodiment]

The trigger switch 30G shown in the cross-sectional view of FIG. 16 represents an eighth embodiment constituting a modified example of the sixth embodiment. Compared with the shapes of the right convex sliding contact portion 82E and the left convex sliding contact portion 86E of the sixth embodiment, the right convex sliding contact portion 82G and the left convex sliding contact portion 86E of the eighth embodiment shown in FIG. The shape of the sliding contact portion 86G is different in that the arc shape of the contact surface is narrowed. The small circular arc-shaped right contact end portion 83G and left contact end portion 87G are in point contact with the planar sliding contact outer peripheral surface 70 instead of surface contact, so that the movement trajectory is linear. With such a configuration, the peripheral clearance can be increased compared with the shape of the right convex sliding contact portion 82E and the left convex sliding contact portion 86E in the sixth embodiment described above. Therefore, it is advantageous in expanding the space for removing dust such as cutting chips. In addition, also in the trigger switch 30G of the eighth embodiment configured in this way, substantially the same operation and effect as the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Ninth Embodiment]

A trigger switch 30H shown in the cross-sectional view of FIG. 17 represents a ninth embodiment constituting a modified example of the first embodiment. Compared with the shapes of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment, the right convex sliding contact portion 72H and the left convex sliding contact portion 72H and the left convex sliding contact portion of the ninth embodiment shown in FIG. The shape of the sliding contact portion 76H is different in that it has an inclined surface inclined upward. The right contact end portion 73H and the left contact end portion 77H at the above-mentioned inclined upper end are in point contact with the planar sliding contact inner peripheral surface 80 instead of surface contact, so that the moving locus is linear. With such a configuration, it is possible to increase the clearance on the lower side of the periphery compared with the shapes of the right convex sliding contact portion 72 and the left convex sliding contact portion 76 of the first embodiment described above. Therefore, it is advantageous in that it is expanded so as to leave a drop-off space for dust such as cutting chips on the lower side. In addition, also in the trigger switch 30H of the ninth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Tenth Embodiment]

The trigger switch 30I shown in the cross-sectional view of FIG. 18 represents the tenth embodiment constituting a modified example of the second embodiment. Compared with the shapes of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment, the right convex sliding contact portion 82I and the left convex sliding contact portion 82I and the left convex sliding contact portion of the tenth embodiment shown in FIG. The shape of the sliding contact portion 86I is different in that it has an inclined surface inclined upward. The right contact end portion 83I and the left contact end portion 87I of the inclined upper end are in point contact rather than surface contact with the planar sliding contact outer peripheral surface 70 , so that the trajectory of movement is linear. With such a configuration, it is possible to increase the clearance on the lower side of the periphery compared with the shape of the right convex sliding contact portion 82A and the left convex sliding contact portion 86A of the second embodiment described above. Therefore, it is advantageous in expanding the space for removing dust such as cutting chips to accumulate on the lower side. In addition, also in the trigger switch 30I of the tenth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

[Eleventh Embodiment]

A trigger switch 30J shown in the cross-sectional view of FIG. 19 represents an eleventh embodiment constituting a modified example of the ninth embodiment. Compared with the shapes of the right convex sliding contact portion 72H and the left convex sliding contact portion 76H of the ninth embodiment, the right convex sliding contact portion 72J and the left convex sliding contact portion 76H of the eleventh embodiment shown in FIG. The shape of the convex sliding contact portion 76J is different in that the gap on the lower side is further enlarged. The right contact end portion 73J and the left contact end portion 77J at the above-mentioned inclined upper end are in point contact with the planar sliding contact inner peripheral surface 80 instead of surface contact, so that the moving locus is linear. With such a configuration, compared with the shape of the right convex sliding contact portion 72H and the left convex sliding contact portion 76H of the above-mentioned ninth embodiment, the gap on the lower side of the periphery is further increased, so the gap is further enlarged. It is advantageous in terms of space to remove dust such as cutting chips. In addition, also in the trigger switch 30J of the eleventh embodiment configured in this way, substantially the same operational effect as that of the trigger switch 30 of the above-mentioned first embodiment is achieved.

[Twelfth Embodiment]

The trigger switch 30K shown in the cross-sectional view of FIG. 20 represents a twelfth embodiment constituting a modified example of the eighth embodiment. In the twelfth embodiment shown in FIG. 20 , the shape of the restricting member 61K is different. The restriction member 61K has a shape in which a right side portion of the rivet member 57 is cut away. That is, the restricting member 61K does not make the sliding contact inner peripheral surface 80 of the right side part and the space peripheral part 54 with respect to the rivet member 57, but only makes the left part slide with the space peripheral part 54 with respect to the rivet member 57. The contact inner peripheral surface 80 is in sliding contact. Therefore, compared with the eighth embodiment, the right convex sliding contact portion 82G is not provided, and only the left convex sliding contact portion 86K is provided. In addition, as shown in FIG. 20 , the left convex sliding contact portion 86K provided on the left sliding contact inner peripheral surface 85 is also formed by having a left contact end portion 87A formed with a direction to the right side in cross-sectional view. Pointed bumps. With such a configuration, it is advantageous in that the structure is simpler than the restricting member 61 of the eighth embodiment described above. In addition, also in the trigger switch 30K of the twelfth embodiment configured in this way, substantially the same operational effects as those of the trigger switch 30 of the above-mentioned first embodiment can be achieved.

In addition, in the trigger switch for electric tools which concerns on this invention, it is not limited to the said embodiment, You may change a position suitably, and may comprise. That is, the electric tool according to the present invention is not limited to the portable circular saw 10, and an appropriate electric tool such as an electric drill may be selected. In addition, the lock mechanism which concerns on this invention is not limited to the said lock mechanism 40, You may select an appropriate structure. That is, as long as the locking mechanism according to the present invention has a restricting member capable of switching states between a restricted state for restricting the pulling operation of the pulling operation member and a retracted state for realizing the pulling operation of the pulling operation member, Can. In addition, the convex sliding contact portion according to the present invention may have a convex shape and narrow the range of sliding contact, and an appropriate shape may be selected as in the above modification.

Claims (4)

1. a trigger switch for power tool, it is arranged at the tool body of electric tool,

The feature of described trigger switch for power tool is,

Have and pull functional unit and locking mechanism, wherein, described in pull functional unit by being carried out operation input by pulling to switch main body, that pulls functional unit described in the restriction of described locking mechanism or permission pulls operation,

Described locking mechanism has limiting part, and this limiting part carries out state switching pulling described in restriction between the restriction state pulling operation of functional unit and the backoff state pulling operation pulling functional unit described in allowing,

Described functional unit of pulling has when having been carried out the spatial configuration of the described limiting part receiving described backoff state when pulling operation,

To slide with the inner peripheral surface of described spatial configuration in described limiting part and the position contacted is set as slidingly contacting outer peripheral face,

To slide in described spatial configuration and the position contacted is set as slidingly contacting inner peripheral surface for slidingly contacting outer peripheral face described in described limiting part,

Outer peripheral face is slidingly contacted and the described either one or both slidingly contacted in inner peripheral surface is provided with convex sliding contacting part described, this convex sliding contacting part has and forms protruding shape towards the described inner peripheral surface that slidingly contacts, and will slide and the range set contacted obtains narrow and small.

2. trigger switch for power tool according to claim 1, is characterized in that,

Described convex sliding contacting part is formed as the projection projected upwards in the side intersected with described direction of pulling operation.

3., according to trigger switch for power tool according to claim 1 or claim 2, it is characterized in that,

Described limiting part is metal.

4. trigger switch for power tool according to claim 3, is characterized in that,

Described limiting part is shaped by punch process.