Portable saw

Abstract

Portable saw includes: a saw blade (10); a handle (20), wherein a receiving cavity is provided on the handle (20) in which a sliding block (30) is slidably arranged, and wherein a release opening is provided at one end of the receiving cavity through which an end portion of the saw blade (10) passes and is fixedly connected to the sliding block (30); a locking device (40) comprising a connecting rod (41) and a trigger handle (42), one end of the connecting rod (41) being connected to the sliding block (30), one end portion of the trigger handle (42) being pivotally connected to the other end of the connecting rod (41), a strip-shaped through-hole (21) being provided on a side wall of the receiving cavity, the connecting rod (41) being guided through the strip-shaped through-hole (21) and being slidable in the strip-shaped through-hole (21), a pressing part (421) being arranged on an end of the trigger handle (42) approaching the connecting rod (41), the pressing part (421) being arranged eccentrically relative to a pivot connection center between the connecting rod (41) and the trigger handle (42), and the trigger handle (42) being pressed in such a way relative to the Connecting rod (41) is rotatable,until the pressing part (421) rests against the handle (20) so that a side wall of the receiving cavity is clamped between the pressing part (421) and the sliding block (30) to limit the sliding of the sliding block (30), and wherein the release handle (42) is rotatable relative to the connecting rod (41) in the pulled state until the pressing part (421) is separated from the handle (20) to release the limitation for the sliding block (30), , characterized by that the connecting rod (41) is a square rod element, so that the rotation of the connecting rod (41) is limited in the strip-shaped through hole (21).

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of hand tools, in particular to a portable saw. STATE OF THE ART

[0002] The traditional saw design involves a saw blade mounted on a bracket. This design is bulky and inconvenient to carry and store. Furthermore, the saw blade is constantly exposed, which can easily lead to accidental injuries, thus creating hidden safety risks.

[0003] The prior art discloses a telescopic saw with a saw blade mounted telescopically on the handle. This saw has a smaller volume and is convenient to carry and store. When not in use, the saw blade can be retracted into the handle, thus preventing accidental misuse from causing injury. However, such telescopic saws have a relatively complex locking structure, making operation inconvenient.

[0004] DE 102011012190 A1 discloses a handsaw with two differently shaped areas along the length of the saw blade and a two-part handle.

[0005] DE 202006003049 U1 discloses a hand saw, comprising a handle having a working end, a guide formed in the handle and open to the front at least at the working end of the handle, a saw blade displaceably arranged in the guide, and a fixing device for fixing the saw blade in positions relative to the guide in which the saw blade protrudes to different extents from the working end of the handle.

[0006] US 2013 / 0055573 A1 discloses a tool, such as a saw or a knife, having a hollow handle and a blade element which can be moved alternately into a storage position or a use position, wherein the blade element is surrounded and protected by the handle in the storage position and protrudes from the handle as an extension of the handle in the use position, wherein the blade element can be locked by locking means with respect to the handle either into the storage position or into the use position.

[0007] CN 202726186 U discloses a novel retractable blade saw. The saw comprises a handle, a saw blade, an adjusting nut used to lock the saw blade, and a saw blade sliding block used to drive the saw blade to slide. The handle comprises a first handle body and a second handle body combined in a clamping operation, a guide through groove passing through one body, disposed on at least one of the first handle body and the second handle body, and the adjusting nut passes through the guide through groove, is connected to the saw blade sliding block, and is in coupling fit with the saw blade sliding block. CONTENT OF THE PRESENT INVENTION

[0008] The present invention aims to solve at least one of the technical problems of the prior art. To this end, the present invention provides a portable saw with a retractable saw blade and convenient operation.

[0009] A portable saw in an embodiment according to a first aspect of the present invention, comprising: a saw blade; a handle, wherein a receiving cavity is provided on the handle, in which a sliding block is slidably arranged, and wherein a release opening is provided at one end of the receiving cavity, through which an end portion of the saw blade is firmly connected to the sliding block; a locking device comprising a connecting rod and a trigger handle, wherein one end of the connecting rod is connected to the sliding block, and wherein an end portion of the trigger handle is pivotally connected to the other end of the connecting rod, and wherein a strip-shaped through-hole is provided on a side wall of the receiving cavity, and wherein the connecting rod is passed through the strip-shaped through-hole and is slidable in the strip-shaped through-hole,and wherein a pressing part is arranged at an end of the trigger handle nearer the connecting rod, and wherein the pressing part is arranged eccentrically relative to the joint center between the connecting rod and the trigger handle, and wherein the trigger handle, in the pressed state, is rotatable relative to the connecting rod until the pressing part abuts the handle, so that the side wall of the receiving cavity is clamped between the pressing part and the sliding block to limit the sliding of the sliding block, and wherein the trigger handle, in the pulled state, is rotatable relative to the connecting rod until the pressing part is separated from the handle to release the limitation for the sliding block.

[0010] The portable saw in the present embodiment of the present invention has at least the following advantages: in use, only the trigger handle needs to be pushed or pulled to restrict the sliding of the sliding block or to release the restriction for the sliding block, thereby locking the saw blade or releasing the lock for the saw blade; the saw has a simple structure and convenient operation, and locking or unlocking the saw blade can be quickly realized.

[0011] In some embodiments of the present invention, the contact surface of the pressing part is a flat surface, and the handle is provided with a flat surface at a position where the handle abuts the pressing part when the saw blade is fully extended. When the pressing part is matingly abutted against the handle, the release handle will not rotate relative to the connecting rod due to external factors such as vibrations, which is beneficial for improving the reliability and stability of the locking device.

[0012] In some embodiments of the present invention, the handle is provided with a step to limit the pressing part when the saw blade is fully extended. When the pressing part is matingly seated against the handle, a limit for the pressing part can be formed to prevent the trigger handle from rotating relative to the connecting rod due to external factors such as vibrations, thereby further improving the reliability and stability of the locking device.

[0013] In some embodiments of the present invention, the trigger handle is provided with a first arcuate surface at the end near the connecting rod to facilitate rotation of the trigger handle relative to the connecting rod.

[0014] In some embodiments of the present invention, a suspension structure for suspending the handle is arranged on the handle, wherein after receiving the saw blade in the receiving cavity, the handle can be suspended from the waist of the user, thereby facilitating carrying.

[0015] In some embodiments of the present invention, the suspension structure comprises an elastic tongue bent from a rod body so that one end of the elastic tongue has two pivot shafts offset upwards and downwards, a C-shaped notch is provided on the handle, and two offset pivot holes corresponding to the two pivot shafts are provided on the handle at the C-shaped notch, and the elastic tongue is rotatably arranged on the C-shaped notch by a fitting between the pivot shafts and the pivot holes and can form a lock at the C-shaped notch.When the elastic buckle tongue is pressed, it can rotate and release the lock at the C-shaped notch; when the elastic buckle tongue is pressed and rotates, the rotation center of the elastic buckle tongue is located at the axis of one of the pivot shafts, while the other pivot shaft is limited by a pivot hole matching with the pivot shaft, whereby the two pivot shafts are offset to the left and right and generate an elastic deformation force; when the elastic buckle tongue is no longer pressed, it can be restored under the action of the elastic deformation force generated by the left and right offset of the two pivot shafts.

[0016] In some embodiments of the present invention, an end of the connecting rod connected to the sliding block is provided with a limiting part, wherein a counterbore is provided on the sliding block, and wherein the connecting rod passes through the counterbore and can be coupled to the sliding block through the limiting part. When the pressing part is matingly engaged with the handle, the sliding block can be clamped between the limiting part and an inner side wall of the receiving cavity to limit the sliding of the sliding block.

[0017] According to the invention, the connecting rod is a square rod member to limit the rotation of the connecting rod in the strip-shaped through hole and thus limit the rotation of the slide block, thereby preventing fluctuation of the saw blade to improve operation stability.

[0018] In some embodiments of the present invention, a second arcuate surface is provided on both sides of the sliding block, wherein the inner side wall of the receiving cavity is formed in an arcuate shape corresponding to the second arcuate surfaces so as to facilitate the sliding block to slide in the receiving cavity. SHORT DESCRIPTION OF THE DRAWING

[0019] In connection with the figures, the embodiment is explained in more detail below so that the above-described and / or added aspects and advantages of the present invention are expressed and easily understood. Fig. 1 shows a schematic structural view of a saw blade in an extended state in one embodiment of the present invention. Fig. 2 shows a schematic structural view of a saw blade in a received state in an embodiment of the present invention. Fig. 3 shows a schematic structural view from a further viewing angle according to Fig. 1. Fig. 4 shows an enlarged view of point B according to Fig. 3. Fig. 5 shows a schematic exploded view of a sliding block and a locking device in an embodiment of the present invention. Fig. 6 shows a schematic structural view of an elastic buckle tongue in an embodiment of the present invention. Fig. Figure 7 shows an enlarged view of point A according to Fig. 1. List of reference symbols 10 saw blades 20 Handle 21 Strip-shaped through hole 22 steps 23 C-shaped notch 24 swivel hole 30 sliding block 31 Counterbore 32 Second arched surface 40 Locking device 41 Connecting rod 411 boundary part 42 release handle 421 Pressed part 422 First arched area 50 Elastic buckle tongue 51 Swivel shaft DETAILED DESCRIPTION

[0020] The embodiment of the present invention is explained in more detail below. All examples of the embodiment are illustrated in figures, with the same or similar reference numerals from beginning to end representing the same or similar elements or elements with the same or similar function. The embodiments illustrated in the figures are exemplary, serve only to explain the present invention, and should not be construed as limiting the present invention.

[0021] It should be noted that the directional and positional explanations, such as the directional or positional relationships indicated by "top," "bottom," "front," "back," "left," "right," etc., are based on the directional or positional relationships illustrated in the figures. They serve only to explain the present invention and to facilitate explanation. They do not show or imply that the illustrated devices or elements have specific directions or should be constructed and operated in specific directions. Therefore, they should not be understood as limiting the present invention.

[0022] In the explanation of the present invention, "the first", "the second", etc. are used only to distinguish technical features, and they cannot be understood to instruct or imply the relative importance, or to imply the number of instructed technical features, or to imply the subsequent relationship of instructed technical features.

[0023] Unless clearly defined, in the explanation of the present invention, the words such as "arranging", "assembling", "connecting", etc. are understood in a broad sense, and those skilled in the art can appropriately define the specific meaning of the above words in the present invention in conjunction with the detailed content of the technical solution.

[0024] With reference to the Fig. 1 and Fig. 2, the portable saw in one embodiment of the present invention comprises a saw blade 10, a handle 20 and a locking device 40.

[0025] A receiving cavity (not shown) is provided on the handle 20, in which a sliding block 30 is slidably arranged, and a release opening (not shown) is provided at one end of the receiving cavity, through which an end portion of the saw blade 10 is firmly connected to the sliding block 30. The locking device 40 comprises a connecting rod 41 and a release handle 42, and one end of the connecting rod 41 is connected to the sliding block 30, and one end portion of the release handle 42 is pivotally connected to the other end of the connecting rod 41. A strip-shaped through-hole 21 is provided on a side wall of the receiving cavity, and the connecting rod 41 is guided through the strip-shaped through-hole 21 and is slidable in the strip-shaped through-hole 21.and wherein a pressing part 421 is arranged at an end of the trigger handle 42 approaching the connecting rod 41, and wherein the pressing part 421 is arranged eccentrically relative to the joint center between the connecting rod 41 and the trigger handle 42, and wherein the trigger handle 42, in the pressed state, is rotatable relative to the connecting rod 41 until the pressing part 421 abuts the handle 20, so that the side wall of the receiving cavity is clamped between the pressing part 421 and the sliding block 30 to limit the sliding of the sliding block 30, and wherein the trigger handle 42, in the pulled state, is rotatable relative to the connecting rod 41 until the pressing part 421 is separated from the handle 20 to release the limitation for the sliding block 30.

[0026] During use, only the release handle 42 should be pushed or pulled to limit the sliding of the sliding block 30 or to release the limitation for the sliding block 30, thereby locking the saw blade 10 or releasing the lock for the saw blade 10; the saw has a simple structure and convenient operation, and locking or unlocking of the saw blade 10 can be quickly realized.

[0027] With reference to the Fig. 3 and Fig. 4, in some embodiments, the abutment surface of the pressing part 421 is a flat surface, and the handle 20 is provided with a flat surface at a position where the handle 20 abuts the pressing part 421 when the saw blade 10 is fully extended. When the pressing part 421 matingly abuts the handle 20, the trigger handle 42 will not rotate relative to the connecting rod 41 due to external factors such as vibrations, which is beneficial for improving the reliability and stability of the locking device 40.

[0028] It should be noted that in some embodiments, the contact surface of the pressing part may further be an arcuate surface, with a corresponding recess being provided on the handle at a location mating with the pressing part 421, whereby the trigger handle will not rotate relative to the connecting rod 41 due to external factors such as vibrations.

[0029] With reference to the Fig. 3 and Fig. 4, in some embodiments, the handle 20 is provided with a stair step 22 for limiting the pressing part 421 when the saw blade 10 is fully extended. When the pressing part 421 is matingly engaged with the handle 20, a limit for the pressing part 421 can be formed to prevent the trigger handle 42 from rotating relative to the connecting rod 41 due to external factors such as vibrations, thereby further improving the reliability and stability of the locking device 40.

[0030] With reference to the Fig. 4 and Fig. 5, in some embodiments, the trigger handle 42 is provided with a first arcuate surface 422 at the end near the connecting rod 41 to facilitate the trigger handle 42 rotating relative to the connecting rod 41.

[0031] With reference to the Fig. 1 and Fig. 2, in some embodiments, a suspension structure for suspending the handle 20 is arranged on the handle 20, wherein after receiving the saw blade 10 in the receiving cavity, the handle 20 can be suspended from the waist of the user, thereby facilitating carrying.

[0032] With reference to Fig. 1, Fig. 2, Fig. 6 and Fig. 7, in some embodiments, the suspension structure includes an elastic tongue 50 bent from a rod body such that one end of the elastic tongue 50 has two upwardly and downwardly offset pivot shafts 51, a C-shaped notch 23 is provided on the handle 20, and two offset pivot holes 24 corresponding to the two pivot shafts 51 are provided on the handle 20 at the C-shaped notch 23, and the elastic tongue 50 is rotatably arranged on the C-shaped notch 23 by a mating between the pivot shafts 51 and the pivot holes 24 and can form a lock on the C-shaped notch 23.When the elastic buckle tongue 50 is pressed, it can rotate and release the lock at the C-shaped notch 23; when the elastic buckle tongue 50 is pressed and rotates, the rotation center of the elastic buckle tongue 50 is located at the axis of one of the pivot shafts 51, while the other pivot shaft 51 is restricted by a pivot hole 24 mating with the pivot shaft 51, whereby the two pivot shafts 51 are offset to the left and right and generate an elastic deformation force; when the elastic buckle tongue 50 is no longer pressed, it can be restored under the action of the elastic deformation force generated by the left and right offset of the two pivot shafts 51.

[0033] It should be noted that in some embodiments, the elastic buckle tongue can further achieve the return function by the spring force of the torsion spring, of course, the suspension structure can also be another structure, such as a key ring structure, it is not limited here.

[0034] With reference to the Fig. 5, in some embodiments, an end of the connecting rod 41 connected to the sliding block 30 is provided with a limiting part 411, wherein a counterbore 31 is provided on the sliding block 30, and wherein the connecting rod 41 is passed through the counterbore 31 and can be coupled to the sliding block 30 through the limiting part 411. When the pressing part 421 is matingly abutted against the handle 20, the sliding block 30 can be clamped between the limiting part 411 and an inner side wall of the receiving cavity to limit the sliding of the sliding block 30.

[0035] It should be noted that in some embodiments, the limiting member 411 may be either a limiting block formed integrally with the connecting rod 41 or a nut forming a threaded connection with the connecting rod 41, but is not limited here.

[0036] With reference to the Fig. 5, in some embodiments, the connecting rod 41 is a square rod member to limit the rotation of the connecting rod 41 in the strip-shaped through hole 21 and thus limit the rotation of the sliding block 30, thereby preventing fluctuation of the saw blade 10 to improve operational stability.

[0037] With reference to the Fig.5, in some embodiments, second arcuate surfaces 32 are provided on both sides of the sliding block 30, wherein the inner side wall of the receiving cavity is arcuately shaped corresponding to the second arcuate surface 32 to facilitate the sliding block 30 sliding in the receiving cavity.

[0038] When, in the explanation of this specification, reference is made to the explanation of the reference terms such as "one embodiment," "some embodiments," "example," "detailed example," or "some examples," etc., it means that the detailed features, structures, materials, or properties described in connection with the embodiment or example will be included in at least one embodiment or example of the present invention. In this specification, the exemplification of the above technical terms does not necessarily refer to the same embodiment or example. Furthermore, the described detailed features, structures, materials, or properties may be combined in any one or more embodiments or examples in any appropriate manner.

[0039] Although the embodiments of the present invention are shown and explained, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

[1] Portable saw includes: a saw blade (10); a handle (20), wherein a receiving cavity is provided on the handle (20) in which a sliding block (30) is slidably arranged, and wherein a release opening is provided at one end of the receiving cavity through which an end portion of the saw blade (10) passes and is firmly connected to the sliding block (30); a locking device (40) comprising a connecting rod (41) and a trigger handle (42), one end of the connecting rod (41) being connected to the sliding block (30), one end portion of the trigger handle (42) being pivotally connected to the other end of the connecting rod (41), a strip-shaped through-hole (21) being provided on a side wall of the receiving cavity, the connecting rod (41) being guided through the strip-shaped through-hole (21) and being slidable in the strip-shaped through-hole (21), a pressing part (421) being arranged on an end of the trigger handle (42) approaching the connecting rod (41), the pressing part (421) being arranged eccentrically relative to a pivot connection center between the connecting rod (41) and the trigger handle (42), and the trigger handle (42) in the pressed state being pivotally mounted relative to the Connecting rod (41) is rotatable,until the pressing part (421) rests against the handle (20) so that a side wall of the receiving cavity is clamped between the pressing part (421) and the sliding block (30) to limit the sliding of the sliding block (30), and wherein the release handle (42) is rotatable relative to the connecting rod (41) in the pulled state until the pressing part (421) is separated from the handle (20) to release the limitation for the sliding block (30), characterized by , that the connecting rod (41) is a square rod element, so that the rotation of the connecting rod (41) is limited in the strip-shaped through hole (21). [2] Portable saw according to claim 1, characterized bythat a contact surface of the pressing part (421) is a flat surface, wherein the handle (20) is provided with a flat surface at a position at which the handle (20) rests against the pressing part (421) when the saw blade (10) protrudes completely. [3] Portable saw according to claim 1 or 2, characterized by that the handle (20) is provided with a step (22) for limiting the pressing part (421) when the saw blade (10) protrudes completely. [4] Portable saw according to one of the preceding claims, characterized by that the trigger handle (42) is provided with a first arcuate surface (422) at one end near the connecting rod (41). [5] Portable saw according to one of the preceding claims, characterized by that a suspension structure for suspending the handle (20) is arranged on the handle (20). [6] Portable saw according to claim 5, characterized byin that the suspension structure comprises an elastic buckle tongue (50) which is formed by bending a rod body such that one end of the elastic buckle tongue (50) has two pivot shafts (51) offset upwards and downwards, wherein a C-shaped notch (23) is provided on the handle (20), and wherein two offset pivot holes (24) corresponding to the two pivot shafts (51) are provided on the handle (20) and at the position of the C-shaped notch (23), and wherein the elastic buckle tongue (50) is rotatably arranged on the C-shaped notch (23) by a fitting between the pivot shafts (51) and the pivot holes (24) and can form a lock on the C-shaped notch (23). [7] Portable saw according to one of the preceding claims, characterized bythat an end of the connecting rod (41) connected to the sliding block (30) is provided with a limiting part (411), wherein a counterbore (31) is provided on the sliding block (30), and wherein the connecting rod (41) is guided through the counterbore (31) and can be coupled to the sliding block (30) by the limiting part (411). [8] Portable saw according to one of the preceding claims, characterized by that second arcuate surfaces (32) are provided on both sides of the sliding block (30), wherein an inner side wall of the receiving cavity is formed in an arcuate shape corresponding to the second arcuate surfaces (32).

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