CN219881460U - Hand-held reciprocating saw - Google Patents

Abstract

The utility model relates to a hand-held reciprocating saw, comprising: a saw blade (14); a housing (32) containing a drive (34) and a transmission (36) for transmitting the motion output by the drive to the saw blade (14); and an adjustment knob (44) for adjusting an operating parameter of the reciprocating saw and a power switch (42) for controlling the drive means, wherein the hand held reciprocating saw (100) further comprises an adjustment locking means for controlling the adjustment knob (44), the adjustment locking means being associated with the adjustment knob (44) and having a locked state that inhibits the adjustment knob (44) from being actuated by an operator and an unlocked state that allows the adjustment knob (44) to be actuated by an operator.

Description

Hand-held reciprocating saw

Technical Field

The present utility model relates to a hand held reciprocating saw.

Background

A conventional hand-held reciprocating saw includes a hand-held body, a base plate attached to the body, and a saw blade extending from the body and through an opening formed in the base plate. In use, the base plate of the reciprocating saw is placed on a workpiece, the saw blade is moved in a feed direction and is reciprocated in an extension direction of the saw blade from the body towards the base plate and the workpiece to form a cut in the workpiece located below the base plate. The feed direction is generally defined as the forward direction along the longitudinal direction, and the extension direction is perpendicular to the longitudinal direction.

The hand-held body includes a head portion, a handle portion and a body portion extending from upper and lower ends of the head portion opposite in an extending direction toward a rearward direction opposite to a feeding direction, the head portion, the body portion and the handle portion defining a transverse opening transverse to the reciprocating saw in a transverse direction perpendicular to both the longitudinal direction and the extending direction for an operator's hand to pass through to grasp the handle portion to operate the reciprocating saw. The hand-held body includes a housing, a motor for providing power and a transmission for transmitting motion of the motor to the saw blade are housed within the housing, in a body portion and/or in a head portion of the hand-held body.

The reciprocating saw further includes a power switch for controlling a power supply of the reciprocating saw and an adjustment knob for adjusting an operating parameter of the reciprocating saw. In the event of handling or accident, the adjustment button may be triggered, with the result that incorrect parameter changes or undesired safety hazards occur.

Disclosure of Invention

The object of the utility model is to prevent an adjustment knob from being accidentally triggered or actuated.

To this end, the present utility model provides a hand held reciprocating saw comprising: a saw blade; a housing in which a driving device and a transmission device for transmitting a motion output from the driving device to the saw blade are accommodated; and an adjustment knob for adjusting an operating parameter of the reciprocating saw and a power switch for controlling the drive means, wherein the hand held reciprocating saw further comprises an adjustment lock means for controlling the adjustment knob, the adjustment lock means being associated with the adjustment knob and having a locked state that inhibits actuation of the adjustment knob by an operator and an unlocked state that allows actuation of the adjustment knob by the operator.

In one embodiment, the adjustment locking device includes a lock knob including a lock knob body extending outside the housing to be actuatable by an operator and an engagement portion located inside the housing and configured to engage or disengage the adjustment knob.

In one embodiment, the engagement portion is a portion of the lock knob body within the housing, or in the form of a tab extending from the lock knob body, or in the form of a cantilevered tab extending from the lock knob body.

In one embodiment, the adjustment knob comprises a recess configured to receive the engagement portion, an unactuated initial position of the lock knob providing the locked state, wherein the engagement portion protrudes into the recess, and an actuated position of the lock knob after actuation by an operator providing the unlocked state, wherein the engagement portion is moved out of the recess.

In one embodiment, the lock knob is in the form of a push button and is configured to translate between respective initial and actuated positions; or the lock knob is in the form of a knob and is configured to rotate between respective initial and actuated positions.

In one embodiment, the hand held reciprocating saw further comprises a power lock for controlling a power switch, the power lock being associated with the power switch and having a locked state that inhibits the power switch from being triggered by an operator and an unlocked state that allows the adjustment knob to be actuated by the operator.

In one embodiment, the lock knob is used simultaneously as the power locking device.

In one embodiment, the engagement portion is a first engagement portion, and the lock knob further includes a second engagement portion located inside the housing and configured to engage or disengage the power switch, the second engagement portion being part of the lock knob body, or in the form of a tab extending from the lock knob body, or in the form of a cantilevered tab extending from the lock knob body.

In one embodiment, the power switch includes a second recess configured to receive the second engagement portion, the second engagement portion protruding into the second recess in an initial position of the lock knob, and the second engagement portion being moved out of the second recess in an actuated position of the lock knob.

In one embodiment, the power supply locking device is configured as a further lock knob provided independently of the lock knob and configured identically to the lock knob, wherein the further lock knob is supported by the housing and comprises a further lock knob body extending outside the housing to be actuatable by an operator and a further engagement portion located inside the housing and configured for engagement or disengagement with the power supply switch, the further engagement portion being a portion of the further lock knob body located inside the housing or in the form of a protrusion extending from the further lock knob body or in the form of a cantilever extending protrusion from the further lock knob body.

In one embodiment, the housing includes a head portion and a body portion and a handle portion extending from a lower end and an upper end of the head portion, respectively, in a rearward direction opposite to a feed direction of the saw blade, the head portion, the body portion and the handle portion of the housing defining a through opening allowing a hand of an operator to pass through, the head portion and the handle portion defining an inside corner connection toward the through opening and the head portion defining an outside corner connection opposite to the inside corner connection, wherein the power switch is disposed at the inside corner connection and protrudes into the through opening, the adjustment knob being disposed on the outside corner connection.

A reciprocating saw constructed in accordance with the present utility model includes an adjustment knob for adjusting an operating parameter of the reciprocating saw and a power switch for controlling the drive means, and further includes an adjustment lockout means for controlling the adjustment knob, the adjustment lockout means being associated with the adjustment knob and having a locked state in which the adjustment knob is inhibited from being actuated by an operator and an unlocked state in which the adjustment knob is permitted to be actuated by the operator. The setting of the adjustment locking means can effectively prevent the adjustment knob from being accidentally triggered or actuated. Preferably, the reciprocating saw further comprises a power lock for controlling the power switch, the power lock being associated with the power switch and having a locked state in which the power switch is inhibited from being actuated by an operator and an unlocked state in which the power switch is permitted to be actuated by the operator. The provision of the power lock is effective to prevent accidental triggering or actuation of the power switch. The power locking means and the adjustment locking means may be provided by the same button or knob, or may be provided as two separate buttons or knobs.

Drawings

FIG. 1 is a simplified elevation view of a reciprocating saw constructed in accordance with the principles of the present utility model.

FIG. 2 is an enlarged illustration of a portion of a side view of the reciprocating saw of FIG. 1.

Detailed Description

The reciprocating saw of the present utility model is described below with reference to the accompanying drawings. Fig. 1 and 2 illustrate a portion of a front view and a side view of a reciprocating saw 100.

In general, the reciprocating saw 100 includes a hand-held body 10, a base plate 12 attached to the hand-held body 10, and a saw blade 14 extending from the hand-held body 10 in an extending direction toward the base plate 12. The base plate 12 is formed with an opening (not shown in the drawing) that allows the saw blade 14 to pass therethrough so that it can perform a reciprocating motion in the extending direction, the opening being elongated in the feeding direction F so that the saw blade 14 can move/feed in the feeding direction F. The base plate 12 has a generally horizontal bottom surface so that the reciprocating saw 100 is placed on a workpiece to be sawn during operation.

In the illustration, the feed direction F is a forward direction along the longitudinal direction, and the saw blade 14 extends from the hand-held body 10 toward the base plate 12 along a vertical direction V (also referred to herein as an "extending direction") perpendicular to the longitudinal direction and has a thickness in a transverse direction (i.e., a direction perpendicular to the drawing page) perpendicular to both the longitudinal direction and the vertical direction V. In the illustrated embodiment, the vertical direction V may be a vertical direction, such that the blade 14 extends in a vertical blade extension plane defined by the longitudinal direction and the vertical direction, with the kerf formed in the workpiece by the blade 14 also being in the vertical plane, i.e., perpendicular to the bottom surface of the base plate 12 of the reciprocating saw 100 or the surface of the workpiece. It will be appreciated that when the operator manually manipulates the hand-held body 10 away from a vertical plane (e.g., pivots an angle about a longitudinal direction), the cut made in the workpiece by the saw blade 14 is oblique to the plane of the workpiece. In the present description, with reference to fig. 1, the directional terms "front" and "rear" are relative to the longitudinal direction, and the directional terms "upper" and "lower" are relative to the vertical direction V.

Referring again to fig. 1, the hand-held body 10 includes a head portion 22, a body portion 24 and a handle portion 26, the body portion 24 and the handle portion 26 extending rearward in the longitudinal direction opposite to the feed direction F from opposite ends (upper end 22a and lower end 22 b) of the head portion 22 in the vertical direction V, respectively. In the illustrated embodiment, the handle portion 26 first extends rearwardly from the upper end 22a of the head portion 22 in a longitudinal direction or generally in a longitudinal direction (e.g., slightly inclined to the longitudinal direction as illustrated), then extends downwardly in a vertical direction V or generally in a vertical direction V (e.g., slightly inclined to the vertical direction V as illustrated), and is connected to the body portion 24, thereby forming a through opening 25 extending through the reciprocating saw 100 in a transverse direction. The through opening 25 is defined by the head portion 22, the body portion 24 and the handle portion 26. It is contemplated that the handle portion 26 may not be connected to the body portion 24 and the through opening 25 may be rearwardly open.

The hand-held body 10 includes a housing 32, the housing 32 being formed of two halves 32a and 32b (see fig. 2). A drive 34 (e.g., a motor) and a transmission 36 for providing power are disposed within the housing 32 in an interior space defined by the two halves 32a and 32 b. Specifically, the drive device 34 is disposed in the body portion 24, and the transmission device 36 is disposed in the body portion 24 and/or the head portion 22.

As mentioned above, the saw blade 14 extends in a saw blade plane defined by a longitudinal direction and a vertical direction V, with a saw tooth (front) side 13 facing the feed direction and an opposite saw back (rear) side 15.

In order to achieve the sawing function of the saw blade 14 described above, the saw blade 14 needs to perform a reciprocating movement in the vertical direction V. To this end, the reciprocating saw 100 includes a reciprocating linear motion device 40 with the saw blade 14 coupled to the reciprocating linear motion device 40 by a tool holder 50. The driving force of the driving means is transmitted to the reciprocating rectilinear motion device 40 via the transmission means 36, so that the reciprocating rectilinear motion device 40 and the tool holder 50 reciprocate in the vertical direction V together with the attached saw blade 14.

In order to achieve the above-described sawing function of the saw blade 14, the saw blade 14 needs to be moved in the feed direction F. To this end, the reciprocating saw 100 includes a wobble device 60, the wobble device 60 including a member, such as a roller, that abuts against the back side 15 of the saw blade 14. The oscillating device 60 is configured to be pivotable relative to the body portion 24 about an axis extending in the transverse direction while the saw blade 14 reciprocates in the vertical direction V to push against the saw blade 14 in the feed direction F to increase the depth of the cut made in the workpiece by the saw blade 14.

Thus, during operation of the reciprocating saw 100, the saw blade 14 performs a combined reciprocating motion in the vertical direction V and translational motion in the feed direction F for the purpose of forming a cut in a workpiece located below the base plate 12. The complex linear motion device 40, the tool holder 50 and the oscillating device 60 are not important to the present utility model and will not be described in detail here.

The hand-held body 10 includes a power switch 42 for controlling the power supply and an adjustment knob 44 for adjusting an operating parameter of the reciprocating saw (e.g., an operating parameter of a motor, a moving parameter of a saw blade, etc.), both the power switch 42 and the adjustment knob 44 being supported by the housing 32 and arranged to be accessible and conveniently operated by the operator's hand holding the handle portion 26.

Specifically, as shown, the junction of the head portion 22 and the handle portion 26 defines an inner corner connection 52 and an opposite outer corner connection 54 (i.e., a corner that faces upward in the vertical direction V and toward the forward or feed direction F in the longitudinal direction) that face the through opening 25. The power switch 42 is disposed at the inside corner connection 52 and protrudes from the interior of the housing 32 into the through opening 25 or is disposed on the handle portion 26 adjacent the head portion 22. The adjustment knob 44 is disposed in the inside and outside corner connection 54 of the housing 32. The operator's fingers of the hand holding the handle portion 26 are able to access the adjustment knob 44 within the housing 32 through a knob opening 45 formed in the housing 32. In the illustrated embodiment, the knob opening 45 is located at the upper end 22a of the head 22 of the housing 32, open toward both the feed direction F and the upward direction of the vertical direction V for easy access by an operator.

The adjustment knob 44 is disposed inside the housing 32 to rotate about an axis extending in the lateral direction when operated by an operator, or in a plane defined by the vertical direction V and the feed direction F.

In the illustrated embodiment, the adjustment knob 44 is mounted to a circuit board 46 in any suitable manner, and the circuit board 46 itself is mounted or secured to the housing 32 in a mechanical manner known in the art, such as to ribs 48 projecting from the housing 32 inwardly of the reciprocating saw 100. The circuit board 46 may contain or be secured with any electrical components necessary for the operational control of the reciprocating saw 100. Alternatively, the adjustment knob 44 may be mechanically fixed directly to the housing 32 and electrically connected to a circuit board mounted elsewhere by conductive elements (e.g., wires).

As shown in fig. 2, the knob opening 45 exposing the adjustment knob 44 is formed by symmetrical cutouts 45a and 45b formed at opposite positions on the two halves 32a and 32b of the housing 32, respectively, i.e., the knob opening 45 is centrally disposed in the lateral direction with the housing 32 of the reciprocating saw 100 or symmetrically disposed with respect to the longitudinal center plane P. Alternatively, it is contemplated that the knob opening 45 need not be centrally disposed in the lateral direction, but may be formed on either half 32a or 32b, in order to accommodate the operating habits of different operators; or the knob opening 45 may be opened only toward the feed direction F or only toward the upward direction of the vertical direction V.

Returning to fig. 1, for ease of comfortable and easy manipulation by the fingers of the hand of the operator holding the handle portion 26, the minimum distance d of the outer surface of the outer Zhou Ju housing 32 of the adjustment knob 44 may be set to be about one tenth of the diameter of an adult's finger (e.g., thumb), such as between 1mm and 5mm, preferably about 2mm. The distance between the centre of the adjustment knob 44 in the longitudinal direction and in the vertical direction V to the uppermost point of the through opening 25 in the vertical direction V (shown in fig. 1 as point O or as a straight line passing through this point and extending in the transverse direction) is denoted by a and b, respectively, which may be smaller than the length of an adult finger (e.g. thumb) and larger than half the length of the finger (e.g. thumb), for example a and b may be between 20mm and 50mm, preferably between 15mm and 35 mm. This may ensure comfort of operation by the operator.

The adjustment knob of the reciprocating saw is provided at the corner of the upper end of the head portion, which allows the operator's hand holding the handle portion to comfortably and conveniently reach and operate both the power switch and the adjustment knob without the need for the other hand to operate the adjustment knob. This greatly increases the flexibility of the operator to operate the reciprocating saw, providing a user experience.

The reciprocating saw of the present utility model further includes: an adjustment locking device for controlling the adjustment knob 44, the adjustment locking device may have a locked state that locks the adjustment knob 44 to prohibit the adjustment knob 44 from being actuated by an operator and an unlocked state that unlocks the adjustment knob 44 to allow the adjustment knob 44 to be actuated by the operator; and a power lock device for controlling the power switch 42, the power lock device may have a locked state that locks the power switch 42 to prohibit the power switch 42 from being actuated by an operator, and an unlocked state that unlocks the power switch 42 to allow the power switch 42 to be actuated by the operator.

In the illustrated example, the function of the adjustment locking means for the adjustment knob 44 and the function of the power locking means for the power switch 42 are implemented by the same lock knob 70. When the lock knob 70 is in the initial position not actuated by the operator, it engages both the power switch 42 and the adjustment knob 44 and locks both the power switch 42 and the adjustment knob 44 from being actuated by the operator; when the lock knob 70 is in the actuated position actuated by the operator, it is disengaged from both the power switch 42 and the adjustment knob 44 to unlock both the power switch 42 and the adjustment knob 44, enabling both to be actuated by the operator.

The lock knob 70 is supported by the housing 32 (e.g., the half 32a or 32 b) and extends from the interior of the housing 32 to the exterior of the half 32b for manipulation by an operator. In the illustrated example, the lock knob 70 is in the form of a push button, and when the operator presses the lock knob 70, the lock knob 70 is translationally switched from an initial position to an actuated position in a moving direction (e.g., the illustrated lateral direction). When the operator releases the lock knob 70, a return spring (not shown) disposed within the housing 32 translationally switches the lock knob 70 from the actuated position back to the initial position.

As one exemplary configuration, referring to the schematic of fig. 1, the lock knob 70 may include a lock knob body 62 extending from the interior of the housing of the reciprocating saw to the exterior of the housing of the reciprocating saw for operator operation, a first tab 74 extending from the lock knob body 62 and configured for engagement or disengagement with the power switch 42, and a second tab 76 extending from the lock knob body 62 and configured for engagement or disengagement with the adjustment knob 44. Accordingly, the power switch 42 and the adjustment knob 44 have a first recess 84 adapted to receive the first tab 74 and a second recess 86 adapted to receive the second tab 76, respectively.

When the lock knob 70 is in the unactuated initial position, the first tab 74 extends into the first recess 84 to inhibit the power switch 42 from being activated by an operator, and the second tab 76 extends into the second recess 86 to inhibit the adjustment knob 44 from being actuated by an operator. When the lock knob 70 is switched from the initial position to the actuated position by being pressed inward in the moving direction (the direction from the outside of the housing toward the inside of the housing), the first protrusion 74 and the second protrusion 76 are moved out of the first recess 84 and the second recess 86, respectively, while unlocking the power switch 42 and the adjustment knob 44.

In the illustrated exemplary structure, the lock knob 70 may include first and second arms 64 and 66 extending from the lock knob body 62 transverse to the direction of movement of the lock knob 70, with first and second protrusions 74 and 76 extending from free ends of the first and second arms 64 and 66, respectively, toward the power switch 42 and the adjustment knob 44 transverse to the first and second arms 64 and 66. Alternatively, one skilled in the art can contemplate any other structure that performs the same function, such as the first tab 74 and the second tab 76 each extending directly from the knob body 62, and such as the first tab 74 and the second tab 76 both extending from the same cantilever arm from the knob body 62. One or both of the first and second protrusions 74, 76 may be integrally formed with the knob body 62 or may be provided separately from the knob body 62.

In the above description with reference to the drawings, the action of the first and second projections 74 and 76 of the lock knob 70 with the power switch 42 and the adjustment knob 44 is achieved by a mechanical arrangement of projections and recesses, alternatively any mechanical arrangement capable of achieving the same function is envisaged by a person skilled in the art.

Although an example in which the adjustment locking means for the adjustment knob 44 and the power locking means for the power switch 42 are implemented by the same lock knob 70 is illustrated in fig. 1, it will be understood by those skilled in the art that both may be configured as two lock knobs independent of each other.

For example, the lock knob 70 includes only the first protrusion 74 and thus serves as a power locking device, or includes only the second protrusion 76 and thus serves as an adjustment locking device. The other locking means may be configured and structured similarly to the lock knob 70 or may differ from the lock knob 70 in some features where the functionality described above is provided, e.g. the lock knob 70 is a push button and the other locking means is a knob, and further e.g. the engagement portion of the lock knob 70 protrudes from the free end of a cantilever arm protruding from the push button body and the engagement portion of the other locking means protrudes directly from the push button body.

Providing each of the power switch 42 and the adjustment knob 44 with a locking function such that only the power switch 42 and the adjustment knob 44 are accidentally touched and cannot be actuated without actuating or unlocking the corresponding lock knob in advance, effectively avoiding a dangerous situation in which the power switch 42 and the adjustment knob 44 are accidentally actuated.

It will be appreciated by persons skilled in the art that the utility model is not limited to the specific embodiments described above with reference to the accompanying drawings. Various modifications, adaptations and combinations of the features of the described embodiments may occur to one skilled in the art without departing from the scope of the utility model as defined in the appended claims.

Claims (11)

1. A hand held reciprocating saw (100), comprising:

a saw blade (14);

a housing (32) containing a drive (34) and a transmission (36) for transmitting the motion output by the drive to the saw blade (14); and

an adjustment knob (44) for adjusting an operating parameter of the reciprocating saw and a power switch (42) for controlling the drive means,

characterized in that the hand-held reciprocating saw (100) further comprises an adjustment locking device for controlling an adjustment knob (44), the adjustment locking device being associated with the adjustment knob (44) and having a locked state prohibiting the adjustment knob (44) from being actuated by an operator and an unlocked state allowing the adjustment knob (44) to be actuated by an operator.

2. The hand-held reciprocating saw (100) of claim 1, wherein the adjustment locking device includes a lock knob (70) including a lock knob body (62) extending outside of the housing (32) to be actuatable by an operator and an engagement portion located inside the housing (32) and configured for engagement or disengagement with the adjustment knob (44).

3. The hand held reciprocating saw (100) of claim 2, wherein the engagement portion is a portion of the lock button body (62) located within the housing (32), or in the form of a tab extending from the lock button body (62), or in the form of a cantilevered tab extending from the lock button body (62).

4. The hand-held reciprocating saw (100) of claim 3, wherein the adjustment knob (44) includes a recess configured to receive the engagement portion, an unactuated initial position of the lock knob (70) providing the locked state wherein the engagement portion protrudes into the recess, and an actuated position of the lock knob (70) after actuation by an operator providing the unlocked state wherein the engagement portion is moved out of the recess.

5. The hand-held reciprocating saw (100) of claim 4, wherein the lock knob (70) is in the form of a push button and is configured to translate between respective initial and actuated positions; or the lock knob (70) is in the form of a knob and is configured to rotate between respective initial and actuated positions.

6. The hand-held reciprocating saw (100) of any one of claims 2-5, further comprising a power locking device for controlling a power switch (42), the power locking device being associated with the power switch (42) and having a locked state that inhibits the power switch (42) from being triggered by an operator and an unlocked state that allows the adjustment knob (44) to be actuated by an operator.

7. The hand-held reciprocating saw (100) of claim 6, wherein the lock knob (70) simultaneously functions as the power lock.

8. The hand-held reciprocating saw (100) of claim 7, wherein the engagement portion is a first engagement portion, the lock knob (70) further comprising a second engagement portion located inside the housing (32) and configured to engage or disengage the power switch (42), the second engagement portion being a portion of the lock knob body (62), or in the form of a tab extending from the lock knob body (62), or in the form of a cantilevered tab extending from the lock knob body (62).

9. The hand-held reciprocating saw (100) of claim 8, wherein the power switch (42) includes a second recess configured to receive the second engagement portion, the second engagement portion protruding into the second recess in an initial position of the lock knob (70), and the second engagement portion being moved out of the second recess in an actuated position of the lock knob (70).

10. The hand-held reciprocating saw (100) according to claim 6, wherein the power supply locking device is configured as a further lock button provided independently of the lock button (70) and of the same construction as the lock button (70),

wherein the further lock knob is supported by the housing (32) and comprises a further lock knob body extending outside the housing to be actuatable by an operator and a further engagement portion inside the housing and configured for engagement or disengagement with the power switch (42), the further engagement portion being a portion of the further lock knob body inside the housing, or in the form of a projection extending from the further lock knob body, or in the form of a projection extending from a cantilever extending from the further lock knob body.

11. The hand held reciprocating saw (100) according to any one of claims 7-10, wherein the housing (32) comprises a head portion (22) and a body portion (24) and a handle portion (26) extending from a lower end and an upper end of the head portion, respectively, in a rearward direction opposite to a feed direction of the saw blade, the head portion, the body portion and the handle portion of the housing defining a through opening (25) allowing a hand of an operator to pass through, the head portion and the handle portion defining an inner corner connection (52) towards the through opening (25) and the head portion defining an outer corner connection (54) opposite to the inner corner connection,

wherein the power switch (42) is disposed at the inner corner connection and protrudes into the through opening, and the adjustment knob (44) is disposed on the outer corner connection (54).